Mold part for insert molding, mold for insert molding, and method for manufacturing insert resin molded product

Abstract

To make it difficult for deformation of an insert part to occur and to enhance an effect of suppressing an occurrence of burrs.SOLUTION: A mold part 10 for insert molding is formed of a plurality of elastic parts 11 arranged circumferentially within a mold with a spacing between adjacent parts increasing from one end side to the other end side, and is equipped with a tapered tubular part 22 that increases in diameter from one end side to the other end side. The tubular part 22 elastically contacts an outer circumference of an insert part inserted into the tubular part 22 at an annular part where the elastic parts 11 elastically deform in a radial direction at one end side and the adjacent elastic parts 11 are close to or abut against each other, and elastically holds the insert part in the radial direction throughout its circumferential direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an insert molding die part, an insert molding die, and a method for manufacturing an insert resin molded product, which are used in so-called insert molding dies, in which an insert part is attached into an injection molding die and the insert part is integrated with resin within the injection molding die to form a resin molded product. In particular, the present invention relates to an insert molding die part, an insert molding die, and a method for manufacturing an insert resin molded product, which are capable of suppressing the occurrence of burrs. [Background technology]

[0002] Insert molding is a technique in which an insert part is inserted into an open injection molding die, and then the die is closed and resin is injected to fill the area around the insert part inside the die, molding the insert part and resin together (composite molding). Here, when insert molding a resin molded product (composite part) that is an integrated insert part and resin, a gap may occur between the insert part and the mold due to the dimensional tolerance of the insert part, i.e., the variation in dimensional accuracy, and resin may flow into the gap, resulting in burrs. This can lead to problems such as a poor yield of molded products and a decrease in molding cycle and productivity of molded products due to the need for extra work to remove burrs after molding. On the other hand, it is difficult to control the dimensional tolerance of the insert part, and the cost is high.

[0003] For example, Patent Document 1 discloses an injection molding die having a slide core that moves toward an insert part when the die is closed, a pressure-receiving wall portion provided on the back side of the slide core, and a wedge-shaped member that enters between the slide core and the pressure-receiving wall portion when the die is closed to press the slide core against the insert part, the wedge-shaped member being attached so as to be movable relative to the die in the die-closing die-opening direction and being elastically biased in the protruding direction by a biasing means such as a spring. According to the description of Patent Document 1, since the wedge-shaped member is attached so as to be movable relative to the die in the die-closing die-opening direction and is elastically biased in the protruding direction by a biasing means such as a spring, the slide core moves according to the amount of intrusion of the wedge-shaped member, and always presses the metal fitting with a substantially constant force, even when the dimension of the insert part is below a set value or above a set value. Therefore, it is said that it is possible to prevent burrs from being generated and deformation of the insert part from occurring. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-36296 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technology of Patent Document 1, since the insert part is biased only in a fixed direction, it is difficult to fully absorb the variation in the overall dimensions and shape of the insert part, and the effect of preventing burrs is low. In addition, since a strong force is generated in the wedge-shaped member by a spring or the like, an excessive load is always applied to the insert part due to a strong holding force in a fixed direction, and depending on the material of the part and the state of the injected resin, there is a risk that the insert part may be deformed or displaced.

[0006] Therefore, an object of the present invention is to provide a mold part for insert molding, a mold for insert molding, and a method for manufacturing an insert resin molded product that is less likely to cause deformation of the insert part and can improve the effect of suppressing the occurrence of burrs. [Means for solving the problem]

[0007] The insert molding die part of the invention of claim 1 is formed of a plurality of elastic parts arranged circumferentially within the die with the spacing between adjacent parts increasing from one end side to the other end side, and is equipped with a tapered tubular part which increases in diameter from the one end side to the other end side, and the tubular part elastically holds the insert part in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part inserted into the tubular part at an annular part where the elastic parts elastically deform radially at the one end side and adjacent elastic parts are close to or abutting each other.

[0008] The multiple elastic portions are arranged circumferentially, i.e., cylindrically, within the mold, with the spacing between adjacent elastic portions expanding from one end side in the longitudinal direction to the opposite end side, forming a tapered cylindrical portion whose diameter expands from one end side to the other end side. Each elastic portion may have elastic force and be elastically deformed by an external force, and may be formed, for example, in the shape of a leaf spring.

[0009] The cylindrical portion is formed by a plurality of elastic parts arranged in the circumferential direction in the mold, and the intervals between adjacent elastic parts are gradually increased from one end side to the other end side, so that the annular diameter of the one end side of the plurality of elastic parts arranged in the circumferential direction is wider than that of the other end side on the opposite side, forming a tapered shape with a larger diameter from one end side to the other end side. The cylindrical portion may be formed by arranging independent elastic parts in the circumferential direction, i.e., in a cylindrical shape, in the mold, with each elastic part being made of an independent member, or the elastic parts may be connected to each other at their end sides and molded integrally. Although it is strictly speaking an inverse tapered shape when viewed from the direction from one end side to the other end side, it will be simply expressed as a tapered shape here.

[0010] The above-mentioned tubular portion elastically holds the insert part in the radial direction over its entire circumferential direction by elastically deforming the elastic portion in the radial direction at the one end side and elastically contacting the outer peripheral surface of the insert part inserted into the tubular portion at the annular portion where adjacent elastic portions are close to or abutting each other, meaning that an external force applied to the tubular portion elastically deforms the multiple elastic portions in the radial direction, and the elastic deformation causes adjacent elastic portions to be close to or abutting each other at the annular portion, where the multiple elastic portions elastically contact in the radial direction over the entire circumferential direction of the insert part, thereby elastically holding the insert part. The external force applied to the tubular portion may be any external force that can change the distance between adjacent elastic portions through elastic deformation of the elastic portions, thereby reducing or increasing the diameter of the tubular portion. For example, the diameter of the tubular portion can be freely deformed by an external force applied to the tubular portion from the outside by movement toward one or both axial directions of the tubular portion, such as clamping a mold, the movement of a hydraulic cylinder, or a spring, or by an external force applied to the tubular portion from the inside by movement toward one axial direction of the tubular portion of an insert inserted into the tubular portion or a shaft portion on which the insert is attached. Note that the annular portion in which adjacent elastic portions are close to or in contact with each other does not require that the elastic portions be in strict contact with each other, but rather means that a clearance (e.g., 0.1 mm or less, preferably 0.08 mm or less, more preferably 0.05 mm or less) sufficient to prevent resin leakage between adjacent elastic portions is acceptable, and it is sufficient that the multiple elastic portions are approximately continuous in the circumferential direction. Furthermore, the above-mentioned radial direction does not require the insert part to be cylindrical, columnar, etc., but if the insert part is, for example, angular, etc., it means the direction from the periphery toward the central position, and can be understood in a broad sense.

[0011] Each of the elastic portions of the insert molding die part of the invention of claim 2 has a curved leaf spring shape with the one end side formed thin, and an external force applied to the tubular portion causes the one end side to bend radially, making it easy to elastically deform the one end side.

[0012] The insert molding die of the invention of claim 3 is an insert molding die having a fixed side die and a movable side die, and is formed of a plurality of elastic parts arranged circumferentially within the fixed side die or the movable side die with the spacing between adjacent parts increasing from one end side to the other end side, and is equipped with a tapered tubular part that increases in diameter from the one end side to the other end side, and the tubular part elastically holds the insert part in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part inserted into the tubular part at an annular part where the elastic parts elastically deform in the radial direction at the one end side and adjacent elastic parts are close to or abutting each other.

[0013] The multiple elastic portions are arranged circumferentially, i.e., cylindrically, within the mold, with the spacing between adjacent elastic portions expanding from one end side in the longitudinal direction to the opposite end side, forming a tapered cylindrical portion whose diameter expands from one end side to the other end side. Each elastic portion may have elastic force and be elastically deformed by an external force, and may be formed, for example, in the shape of a leaf spring.

[0014] The cylindrical portion is formed by a plurality of elastic parts arranged in the circumferential direction in the mold, and the intervals between adjacent elastic parts are gradually increased from one end side to the other end side, so that the annular diameter of the one end side of the plurality of elastic parts arranged in the circumferential direction is wider than that of the other end side on the opposite side, forming a tapered shape with a larger diameter from one end side to the other end side. The cylindrical portion may be formed by arranging independent elastic parts in the circumferential direction, i.e., in a cylindrical shape, in the mold, with each elastic part being made of an independent member, or the elastic parts may be connected to each other at their end sides and molded integrally. Although it is strictly speaking an inverse tapered shape when viewed from the direction from one end side to the other end side, it will be simply expressed as a tapered shape here.

[0015] The above-mentioned tubular portion elastically holds the insert part in the radial direction over its entire circumferential direction by elastically deforming the elastic portion in the radial direction at the one end side and elastically contacting the outer peripheral surface of the insert part inserted into the tubular portion at the annular portion where adjacent elastic portions are close to or abutting each other, meaning that an external force applied to the tubular portion elastically deforms the multiple elastic portions in the radial direction, and the elastic deformation causes adjacent elastic portions to be close to or abutting each other at the annular portion, where the multiple elastic portions elastically contact in the radial direction over the entire circumferential direction of the insert part, thereby elastically holding the insert part. The external force applied to the tubular portion may be any external force that can change the distance between adjacent elastic portions through elastic deformation of the elastic portions, thereby reducing or increasing the diameter of the tubular portion. For example, the diameter of the tubular portion can be freely deformed by an external force applied to the tubular portion from the outside by movement toward one or both axial directions of the tubular portion, such as clamping a mold, the movement of a hydraulic cylinder, or a spring, or by an external force applied to the tubular portion from the inside by movement toward one axial direction of the tubular portion of an insert inserted into the tubular portion or a shaft portion on which the insert is attached. Note that the annular portion in which adjacent elastic portions are close to or in contact with each other does not require that the elastic portions be in strict contact with each other, but rather means that a clearance (e.g., 0.1 mm or less, preferably 0.08 mm or less, more preferably 0.05 mm or less) sufficient to prevent resin leakage between adjacent elastic portions is acceptable, and it is sufficient that the multiple elastic portions are approximately continuous in the circumferential direction. Furthermore, the above-mentioned radial direction does not require the insert part to be cylindrical, columnar, etc., but if the insert part is, for example, angular, etc., it means the direction from the periphery toward the central position, and can be understood in a broad sense.

[0016] The insert molding die of the invention according to claim 4 further comprises a shaft portion that is passed through the inside of the cylindrical portion and positions the insert part. The shank is intended to position the insert part to be inserted into the tubular part formed by the multiple elastic parts, and may be, for example, a shank into which the insert part is inserted through a hole in the insert part, a shank configured to hold the insert part around itself, or a shank into which the insert part fits.

[0017] The cylindrical portion of the insert molding die of the invention of claim 5 elastically holds the insert part inserted into the cylindrical portion in the radial direction around its entire circumference by the multiple elastic portions elastically deforming in the radial contraction direction of the cylindrical portion due to an external force applied from the outside, or by the multiple elastic portions elastically deforming in the radial expansion direction of the cylindrical portion due to an external force applied from the inside.

[0018] The external force applied from outside the tubular portion may be any external force that reduces the distance between adjacent elastic portions due to the elastic deformation of each elastic portion, thereby deforming the tubular portion in a radially reducing direction. For example, an external force applied to one or both axial sides of the tubular portion by clamping a mold, a hydraulic cylinder, the movement of a spring, etc., causes the tubular portion to elastically deform in a radially reducing direction from the outside of the tube. Furthermore, the external force applied from the inside of the tubular portion may be an external force that expands the gap between adjacent elastic portions due to the elastic deformation of each elastic portion, thereby deforming the tubular portion in the radially expanding direction; for example, an external force applied from the inside of the tubular portion causes an insert part inserted into the tubular portion or a shaft portion to which it is attached to move toward one axial side of the tubular portion, thereby elastically deforming the tubular portion in the radially expanding direction.

[0019] The manufacturing method of the insert resin molded product of the invention of claim 6 includes, in an insert molding mold part mounting step, arranging a tapered tubular part in a fixed mold or a movable mold, the tapered tubular part being formed of a plurality of elastic parts arranged in the circumferential direction with the spacing between adjacent elastic parts increasing from one end side to the other end side, and increasing in diameter from the one end side to the other end side; and, in an insert part holding step, applying an external force from the outside to the tubular part, the one end side of the plurality of elastic parts in the tubular part elastically deforms in a diameter reducing direction, and adjacent elastic parts come into elastic contact with an outer circumferential surface of the insert part inserted into the tubular part at an annular part where the elastic parts are close to or abut against each other. The insert part is elastically held in the radial direction over its entire circumferential direction, or when an external force is applied from the inside to the tubular part, the one end sides of the multiple elastic parts in the tubular part elastically deform in the radial expansion direction so that adjacent elastic parts are close to or abutting each other at annular parts where they elastically contact the outer peripheral surface of the insert part inserted into the tubular part, thereby elastically holding the insert part in the radial direction over its entire circumferential direction, and in the molding process to form an insert resin molded product, resin is filled into the cavity in which the insert part is positioned when the fixed side mold and the movable side mold are clamped, and the insert part and the resin are molded integrally.

[0020] The multiple elastic portions are arranged circumferentially, i.e., cylindrically, within the mold, with the spacing between adjacent elastic portions expanding from one end side in the longitudinal direction to the opposite end side, forming a tapered cylindrical portion whose diameter expands from one end side to the other end side. Each elastic portion may have elastic force and be elastically deformed by an external force, and may be formed, for example, in the shape of a leaf spring.

[0021] The cylindrical portion is formed by a plurality of elastic parts arranged in the circumferential direction in the mold, and the intervals between adjacent elastic parts are gradually increased from one end side to the other end side, so that the annular diameter of the one end side of the plurality of elastic parts arranged in the circumferential direction is wider than that of the other end side on the opposite side, forming a tapered shape with a larger diameter from one end side to the other end side. The cylindrical portion may be formed by arranging independent elastic parts in the circumferential direction, i.e., in a cylindrical shape, in the mold, with each elastic part being made of an independent member, or the elastic parts may be connected to each other at their end sides and molded integrally. Although it is strictly speaking an inverse tapered shape when viewed from the direction from one end side to the other end side, it will be simply expressed as a tapered shape here.

[0022] When an external force is applied to the tubular portion from the outside, the one end sides of the multiple elastic parts in the tubular portion elastically deform in the radial contraction direction, and adjacent elastic parts are brought into close proximity or abutment at the annular portion where they elastically contact the outer peripheral surface of the insert part inserted into the tubular portion, thereby elastically holding the insert part in the radial direction over its entire circumferential direction means that an external force applied to the tubular portion from the outside causes the multiple elastic parts to elastically deform in the radial contraction direction, and adjacent elastic parts are brought into close proximity or abutment at the annular portion where they elastically contact in the radial direction over the entire circumferential direction of the insert part, thereby elastically holding the insert part. The external force applied from outside the tubular portion may be any external force that reduces the distance between adjacent elastic portions due to the elastic deformation of each elastic portion, thereby deforming the tubular portion in a radially reducing direction. For example, an external force applied to one or both axial sides of the tubular portion by clamping a mold, a hydraulic cylinder, the movement of a spring, etc., causes the tubular portion to elastically deform in a radially reducing direction from the outside of the tube.

[0023] Furthermore, when an external force is applied to the cylindrical portion from the inside, the one end sides of the multiple elastic portions in the cylindrical portion elastically deform in the radial expansion direction, and adjacent elastic portions are close to or abutting each other at the annular portion where they come into elastic contact with the outer peripheral surface of the insert part inserted into the cylindrical portion, thereby elastically holding the insert part in the radial direction throughout its circumferential direction means that an external force applied to the cylindrical portion from the inside causes the multiple elastic portions to elastically deform in the radial expansion direction, and adjacent elastic portions are close to or abutting each other at the annular portion where they come into elastic contact in the radial direction throughout the circumferential direction of the insert part, thereby elastically holding the insert part. The external force applied from the inside of the tubular portion may be an external force that expands the gap between adjacent elastic portions due to the elastic deformation of each elastic portion, thereby deforming the tubular portion in the radially expanding direction; for example, an external force applied from the inside of the tubular portion causes an insert part inserted into the tubular portion or a shaft portion to which it is attached to move toward one axial direction of the tubular portion, thereby elastically deforming the tubular portion in the radially expanding direction. Note that the annular portion in which adjacent elastic portions are close to or in contact with each other does not require that the elastic portions be in strict contact with each other, but rather means that a clearance (e.g., 0.1 mm or less, preferably 0.08 mm or less, more preferably 0.05 mm or less) sufficient to prevent resin leakage between adjacent elastic portions is acceptable, and it is sufficient that the multiple elastic portions are approximately continuous in the circumferential direction. Furthermore, the above-mentioned radial direction does not require the insert part to be cylindrical, columnar, etc., but if the insert part is, for example, angular, etc., it means the direction from the periphery toward the central position, and can be understood in a broad sense. Effect of the Invention

[0024] According to the invention of claim 1, the mold part for insert molding is formed of a plurality of elastic parts arranged circumferentially within the mold with the spacing between adjacent elastic parts increasing from one end side to the other end side, and is equipped with a tapered tubular part that increases in diameter from the one end side to the other end side, and the tubular part elastically holds the insert part in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part inserted into the tubular part at an annular part where the elastic parts elastically deform radially at the one end side and the adjacent elastic parts are close to or abutting each other due to the elastic deformation. Therefore, according to the insert molding mold part of the invention of claim 1, when an external force is applied to a tapered tubular part formed by arranging multiple elastic parts in a circumferential direction within a mold with the spacing between adjacent elastic parts expanding from one end side to the other end side, the spacing between adjacent elastic parts in the circumferential direction changes due to elastic deformation of one end side of the multiple elastic parts forming the tubular part, causing the tubular part to shrink or expand in diameter, and the multiple elastic parts elastically contact the outer peripheral surface of the insert part inserted into the tubular part at the annular part where adjacent elastic parts are close to or abutting each other, thereby elastically holding the insert part inserted into the tubular part in the radial direction over its entire circumferential direction.

[0025] Therefore, since the multiple elastic parts are in elastic contact with the entire circumferential direction of the insert part in the radial direction at the annular part where adjacent elastic parts are close to or in contact with each other, and are in close contact with the entire circumferential direction of the insert part, even if the dimensional accuracy of the insert part varies, the effect of suppressing the occurrence of resin burrs during insert molding can be improved. Furthermore, since the annular part elastically holds the insert part in the radial direction with respect to the entire circumferential direction, and the insert part is not biased in a fixed direction, deformation of the insert part is unlikely to occur. Thus, according to the insert molding die part of the invention of claim 1, deformation of the insert part is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0026] According to the insert molding die part of the invention of claim 2, the elastic part has a curved leaf spring shape with the one end side formed thin, so that the one end side is easily bent in the radial direction, and the adhesiveness that elastically holds the insert part can be improved. Therefore, in addition to the effect of claim 1, the occurrence of burrs can be further suppressed.

[0027] According to the invention of claim 3, the insert molding die has a fixed side die and a movable side die, and is formed of a plurality of elastic parts arranged circumferentially within the fixed side die or the movable side die with the spacing between adjacent elastic parts increasing from one end side to the other end side, and is equipped with a tapered tubular part that increases in diameter from the one end side to the other end side, and the tubular part elastically holds the insert part in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part inserted into the tubular part at an annular part where the elastic parts elastically deform radially at the one end side and the adjacent elastic parts are close to or abutting each other due to the elastic deformation. Therefore, according to the insert molding die of the invention of claim 3, when an external force is applied to a tapered tubular portion formed by arranging multiple elastic portions in the circumferential direction within the die with the spacing between adjacent elastic portions expanding from one end side to the other end side, the spacing between adjacent elastic portions in the circumferential direction changes due to elastic deformation of one end side of the multiple elastic portions forming the tubular portion, causing the tubular portion to shrink or expand in diameter, and the multiple elastic portions elastically contact the outer peripheral surface of the insert part inserted into the tubular portion at the annular portion where the elastic portions are close to or abutting each other, thereby elastically holding the insert part inserted into the tubular portion in the radial direction over the entire circumferential direction.

[0028] Therefore, since the multiple elastic parts are in elastic contact with the entire circumferential direction of the insert part in the radial direction at the annular part where adjacent elastic parts are close to or in contact with each other, and are in close contact with the entire circumferential direction of the insert part, even if the dimensional accuracy of the insert part varies, the effect of suppressing the occurrence of resin burrs during insert molding can be improved. Furthermore, since the annular part elastically holds the insert part in the radial direction with respect to the entire circumferential direction, and the insert part is not biased in a fixed direction, deformation of the insert part is unlikely to occur. Thus, according to the insert molding die of the invention as set forth in claim 3, deformation of the insert part is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0029] According to the insert molding die of the invention of claim 4, further comprising an axial portion that is passed through the cylindrical portion to position the insert part, thereby making it possible to easily position the insert part in addition to the effect of claim 3.

[0030] According to the insert molding die of the invention of claim 5, the tubular portion elastically holds the insert part in the radial direction over its entire circumferential direction by the elastic portion elastically deforming in the radial contraction direction of the tubular portion due to an external force applied from the outside, or by the elastic portion elastically deforming in the radial expansion direction of the tubular portion due to an external force applied from the inside, thereby making it possible to easily insert the insert part into the tubular portion, in addition to the effect described in claim 3.

[0031] According to the manufacturing method of the insert resin molded product of the invention of claim 6, in the insert molding mold part mounting step, a tapered tubular part expanding in diameter from one end side to the other end side, which is formed by a plurality of elastic parts arranged in the circumferential direction with the adjacent elastic parts expanding from one end side to the other end side, is disposed in a fixed side mold or a movable side mold, and in the insert part holding step, an external force is applied from the outside to the tubular part, whereby the one end side of the plurality of elastic parts in the tubular part elastically deforms in the diameter contraction direction, and the adjacent elastic parts are brought into close proximity or abutment with each other due to the elastic deformation, and elastically contact the outer circumferential surface of the insert part inserted into the tubular part at an annular part. Alternatively, when an external force is applied from the inside to the cylindrical portion, one end side of the multiple elastic portions in the cylindrical portion elastically deforms in the radial expansion direction, and the elastic deformation causes adjacent elastic portions to come into close proximity or abut against each other at annular portions, thereby elastically contacting the outer peripheral surface of the insert part inserted into the cylindrical portion, thereby elastically holding the insert part in the radial direction over its entire circumferential direction.In the molding process, resin is filled into the cavity formed between the fixed side mold and the movable side mold in a clamped state, in which the insert part is positioned, and the insert part and the resin are molded integrally to form an insert resin molded product.

[0032] Therefore, when an external force is applied to a tapered tubular section formed by arranging multiple elastic sections circumferentially within a fixed side mold or a movable side mold with the spacing between adjacent elastic sections expanding from one end side to the other end side, the spacing between adjacent elastic sections in the circumferential direction changes due to elastic deformation on one end side of the multiple elastic sections forming the tubular section, causing the tubular section to shrink or expand in diameter, and the multiple elastic sections elastically contact the outer peripheral surface of the insert part inserted into the tubular section at the annular section where the elastic sections are close to or abutting each other, thereby elastically holding the insert part inserted into the tubular section in the radial direction throughout its entire circumferential direction.

[0033] Therefore, since the multiple elastic parts are in elastic contact with the entire circumferential direction of the insert part in the radial direction at the annular part where adjacent elastic parts are close to or in contact with each other, and are in close contact with the entire circumferential direction of the insert part, even if the dimensional accuracy of the insert part varies, the effect of suppressing the occurrence of resin burrs during insert molding can be improved. Furthermore, since the annular part elastically holds the insert part in the radial direction with respect to the entire circumferential direction, and the insert part is not biased in a fixed direction, deformation of the insert part is unlikely to occur. In addition, the tubular portion elastically holds the insert part inserted into the tubular portion in the radial direction around its entire circumference by each elastic part elastically deforming in the radial contraction direction of the tubular portion due to an external force applied from the outside, or by each elastic part elastically deforming in the radial expansion direction of the tubular portion due to an external force applied from the inside, thereby facilitating the insertion of the insert part into the tubular portion. Thus, according to the method for producing an insert resin molded product of the invention as set forth in claim 6, deformation of the insert part is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced. [Brief description of the drawings]

[0034] [Figure 1] FIG. 1 is a perspective view illustrating a state in which a die component for insert molding according to a first embodiment of the present invention is placed in a die. FIG. [Diagram 2] FIG. 2(a) is an explanatory diagram illustrating the insert molding mold part according to embodiment 1 of the present invention when placed in a mold, as viewed from the front in the initial state before the insert part is inserted, and FIG. 2(b) is an explanatory diagram illustrating the insert molding mold part according to embodiment 1 of the present invention when placed in a mold, as viewed from the front in the state after the insert part has been inserted and the mold is clamped. [Diagram 3]FIG. 3(a) illustrates the insert molding mold part according to embodiment 1 of the present invention when placed in a mold, and is an explanatory view corresponding to the end view taken along section line AA in FIG. 2(a) in the initial state before the insert part is inserted, and an explanatory view seen from the side. FIG. 3(b) illustrates the insert molding mold part according to embodiment 1 of the present invention when placed in a mold, and is an explanatory view corresponding to the end view taken along section line BB in FIG. 2(b) in the state after the insert part has been inserted and the mold is clamped, and is an explanatory view seen from the side. [Figure 4] FIG. 4(a) is an explanatory diagram illustrating the state in which an insert molding die part is attached to an insert molding die according to embodiment 1 of the present invention, and FIG. 4(b) is an enlarged explanatory diagram of a key part illustrating the state of the insert molding die part attached to the insert molding die according to embodiment 1 of the present invention before the insert part is inserted. [Diagram 5] FIG. 5(a) is an explanatory diagram illustrating a state in which an insert part is attached to an insert molding die part of an insert molding die according to embodiment 1 of the present invention, and FIG. 5(b) is an enlarged explanatory diagram of a key part illustrating a state in which an insert part is inserted into an insert molding die part in an insert molding die according to embodiment 1 of the present invention. [Figure 6] FIG. 6(a) is an explanatory diagram illustrating a state in which an insert part is attached to an insert molding die part of an insert molding die according to embodiment 1 of the present invention and the die is clamped, and FIG. 6(b) is an enlarged explanatory diagram of a key part illustrating a state in which an insert part is inserted into an insert molding die part of an insert molding die according to embodiment 1 of the present invention and the insert part is elastically held by clamping. [Figure 7] FIG. 7(a) is an explanatory diagram illustrating the state in which resin has been filled into the cavity in the insert molding die according to embodiment 1 of the present invention, and FIG. 7(b) is an enlarged explanatory diagram of the main parts illustrating the state in which resin has been formed around the insert part that is elastically held by the insert molding die parts in the insert molding die according to embodiment 1 of the present invention. [Figure 8]FIG. 8(a) is an explanatory diagram illustrating the state in which the insert molding die according to embodiment 1 of the present invention is opened after molding, and FIG. 8(b) is an enlarged explanatory diagram of a key part illustrating the state in which the insert molding die according to embodiment 1 of the present invention is opened after molding of the resin filled around the insert part elastically held by the insert molding die parts. [Figure 9] FIG. 9(a) is an explanatory diagram illustrating the state in which an insert resin molded product is removed (released) from an insert molding die according to embodiment 1 of the present invention, and FIG. 9(b) is an enlarged explanatory diagram of a key part illustrating the state in which an insert resin molded product is removed (released) from the die on the mounting side of the insert molding die part according to embodiment 1 of the present invention. [Figure 10] FIG. 10 is a perspective view illustrating a state in which a die component for insert molding according to the first modification of the first embodiment of the present invention is placed in a die. [Figure 11] FIG. 11(a) is an enlarged explanatory view of a main part explaining the state in which a shaft portion is being inserted into a cylindrical portion of a mold part for insert molding in an insert molding die according to embodiment 2 of the present invention; FIG. 11(b) is an enlarged explanatory view of a main part explaining the state in which a small-diameter end side of a cylindrical portion of a mold part for insert molding in an insert molding die according to embodiment 2 of the present invention is expanded in diameter by inserting a large-diameter shaft portion of a shaft portion; and FIG. 11(c) is an enlarged explanatory view of a main part explaining the state in which a small-diameter end side of a cylindrical portion of a mold part for insert molding in an insert molding die according to embodiment 2 of the present invention is expanded in diameter by inserting a large-diameter shaft portion of a shaft portion. FIG. 11(d) is an enlarged explanatory diagram of essential parts illustrating a state in which an insert part is attached to the small diameter shaft part of the shaft part in an insert molding die part relating to embodiment 2 of the present invention, where the insert part attached to the shaft part of the insert molding die part is inserted into the small diameter end side of the cylindrical part and elastically held by the cylindrical part, and FIG. 11(e) is an enlarged explanatory diagram of essential parts illustrating a state in which resin has been formed around the insert part elastically held by the cylindrical part of the insert molding die part in the insert molding die part relating to embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each embodiment and variant example, the same symbols and the same reference characters denote the same or corresponding functional parts, and the same symbols and the same reference characters in each embodiment and variant example denote functional parts common to those embodiments and variant examples, so duplicate detailed explanations will be omitted here.

[0036] [Embodiment 1] First, an insert molding die component 10 according to a first embodiment of the present invention will be described with reference to FIGS. The insert molding die part 10 according to this embodiment 1 is intended to elastically hold an insert part 50 made of metal, ceramic, synthetic resin, etc. in the radial direction throughout its circumferential direction within an insert molding die 100 (hereinafter sometimes simply referred to as "die 100"), and is equipped with a plurality of elastic parts 11 arranged circumferentially, i.e., in a cylindrical (annular) shape within the die 100 to form a tubular portion 22, and an axis part 31 arranged on a virtual axis O (hereinafter simply referred to as "axis O") of the tubular portion 22 formed by the plurality of elastic parts 11 within the die 100. In the first embodiment, an example will be described in which a cylindrical insert part 50 having a through hole 51 at the center, such as a collar member, is molded integrally with resin 60.

[0037] Each elastic portion 11 has a substantially constant width but a gradually thinner thickness toward the tip of one end in the length direction, and is formed of a metal (such as spring steel) with a curved end, and has a substantially leaf spring shape. The multiple elastic portions 11 forming the tubular portion 22 in this embodiment 1 are not integrally molded, but are made of mutually independent members molded separately. In this embodiment 1, each elastic portion 11 has the same size and shape. In this embodiment 1, the elastic portion 11 is formed so that one end side in the longitudinal direction is thin and the other end side on the opposite side is thick, and the movement of the other end side is restricted by a positioning means or the like (not shown) within the mold 100.

[0038] The shaft portion 31 positions the insert part 50 at a predetermined position, which is inserted into the small-diameter end side of the tubular portion 22 formed by arranging multiple elastic portions 11 circumferentially, i.e., in a cylindrical (annular) shape, within the mold 100.The shaft portion 31 is arranged coaxially with the axis O of the tubular portion 22 formed by the multiple elastic portions 11, and holds the insert part 50 by inserting it into the through hole 51 of the insert part 50, which has a through hole 51 of a collar member or the like.

[0039] The shaft portion 31 has, for example, a substantially circular cross-sectional outer shape, a small diameter shaft portion 31a on one end side that is inserted into the through hole 51 of the insert part 50, and a large diameter shaft portion 31b that is continuous with the small diameter shaft portion 31a and has a larger diameter than the small diameter shaft portion 31a, and forms a step surface 32 at the boundary between the small diameter shaft portion 31a and the large diameter shaft portion 31b. In the first embodiment, a magnet such as a magnet (not shown) is provided on the step surface 32 side of the large diameter shaft portion 31b of the shaft portion 31 to improve the accuracy of positioning the insert part 50.

[0040] Next, an insert molding die (injection molding die) 100 to which the insert molding die part 10 having the plurality of elastic portions 11 and the shaft portion 31 is attached will be described. As shown in Figures 4 to 9, an insert molding die 100 for manufacturing an insert resin molded product 700 by injection molding is composed of a fixed side die 200 and a movable side die 300. By closing (clamping) the fixed side die 200 and the movable side die 300, a cavity (hollow portion) 400 that constitutes a molding die corresponding to the shape of the insert resin molded product 700 is formed, and injected resin 60 is molded within this cavity 400. By opening (opening) the fixed side die 200 and the movable side die 300, the insert resin molded product 700 molded within the cavity 400 can be removed. In addition, examples of materials used for the insert molding die 100 include mechanical structural carbon steel (S45C, S50C, S55C, etc.), chromium molybdenum steel (SCM4, etc.), carbon tool steel (SK7, etc.), die steel (SKD4, SKD5, SKD6, SKD61, etc.), and high-speed steel (SKH2, etc.).

[0041] The fixed mold 200 is the side that is fixed to the injection molding apparatus, and generally has a fixed attachment plate 211 and a fixed mold plate (also called a cavity plate, a fixed main plate, or a female mold) 212. The fixed-side mounting plate 211 is attached to a fixed platen (not shown) which is fixed on the base of the injection molding machine. A locating ring (not shown) for positioning corresponding to an opening formed in the center of the fixed platen can be attached to the fixed-side mounting plate 211 with a tightening bolt or the like, and by aligning the locating ring, which has a hole formed in the center, with the opening in the center of the fixed platen, the nozzle N of the injection machine and a flow passage such as a sprue provided in the fixed-side mold 200 can be aligned with high precision. The fixed-side mold plate 212 has a recess, and forms a cavity 400 between itself and the movable-side mold plate 312 . Inside the fixed mold 200, there are provided passages, such as sprues, runners, gates, etc., that guide the molten thermoplastic resin or thermosetting resin 60 injected from the injection nozzle N of the injection machine to the cavity 400.

[0042] The movable side mold 300 is the side that is attached to a movable platen (not shown) of the mold clamping device of the injection molding apparatus, and is capable of moving forward and backward relative to the fixed side mold 200, and is composed of a movable side mounting plate 311, a spacer block 313, an ejector plate 314, an ejector pin 316, a movable side mold plate 312, etc.

[0043] The movable side mounting plate 311 is connected to a movable platen of an injection molding machine, and has an ejector hole in the center through which an ejector rod 321 passes. The spacer block 313 is attached between the movable mounting plate 311 and the movable mold plate 312 to form a space for ejection by the ejector plate 314 and the ejector pins 316 .

[0044] The ejector plate 314 is disposed in a space defined by a spacer block 313 disposed between the movable attachment plate 311 and the movable mold plate 312, and moves forward and backward toward the movable mold plate 312 side. The ejector pin 316 is fixed to the ejector plate 314 and protrudes from the ejector plate 314. One or more ejector pins 316 are provided and are inserted into holes drilled through the movable-side mold plate 312 and the insert 312A fitted therein, so that the ejector plate 314 is pushed out (advancement) by the ejector rod 321 to push out the insert resin molded product 700 remaining on the parting surface (PL surface) of the movable-side mold plate 312.

[0045] The movable-side mold plate 312 has a protrusion into which a nest 312A is fitted as necessary, and forms a cavity 400 between itself and the fixed-side mold plate 212. The movable-side mold plate 312 is fixed via a spacer block 313 to a movable-side attachment plate 311 which is attached to the movable platen of the injection molding device. A return pin 317 is inserted into the movable mold plate 312, one end of which is fixed to the ejector plate 314. A return spring 318 is attached around the return pin 317 to bias the ejector plate 314 in a direction to move backward, and the repulsive force of the return spring 318 allows the ejector plate 314 to move away from the movable mold plate 312 and return to its original position after the insert resin molded product 700 is ejected by the ejector pin 316. After the insert resin molded product 700 is molded, the fixed mold 200 and the movable mold 300 are opened, and the insert resin molded product 700 remaining on the cavity wall surface side of the movable mold plate 312 can be ejected by the ejector pin 316 via the ejector plate 314 by utilizing the operation of the ejector rod 321 of the injection molding device, and can be removed from the mold 100. That is, the insert resin molded product 700 remaining on the cavity wall surface on the movable mold 300 side of the parting surface, which is the dividing surface between the fixed mold plate 212 and the movable mold plate 312, is ejected and removed by an ejection mechanism consisting of the ejector plate 314, the ejector pin 316, and the return pin 317. After the insert resin molded product 700 is released and removed from the mold, the ejector rod 321 of the injection molding device is retracted, and the ejector pin 316 is retracted in the axial direction by the repulsive force of the return spring 318, returning to the original position before ejection. Then, the mold is clamped again to start the next injection molding.

[0046] The fixed side mold 200 and the movable side mold 300 are aligned by having multiple (e.g., four) guide pins 215 fixed to the fixed side mold 200 side or the movable side mold 300 side fitted into multiple guide bushes (guide bearings) 216 provided on the movable side mold plate 312 side of the movable side mold 300 or the fixed mold plate 212 side of the fixed side mold 200, which guide the sliding when the molds are closed. Furthermore, the fixed mold 200 and the movable mold 300 are connected by a tension link 219 that limits the mold opening stroke between the fixed mold plate 212 and the movable mold plate 312 when the molds are opened.

[0047] In the insert molding die 100 of the first embodiment, the insert molding die part 10 is mounted inside the movable-side mold plate 312 of the movable-side mold 300 or inside the insert 312A fitted therein. That is, in the present embodiment 1, the multiple elastic parts 11 of the insert molding die part 10 are arranged in the circumferential direction, i.e., in a cylindrical (annular) shape, in the movable-side mold plate 312 of the die 100 to form the tubular part 22. For example, a positioning means (not shown) having recesses or holes into which the end sides of the elastic parts 11 of the insert molding die part 10 are inserted and fitted is provided on the movable-side mold plate 312 or the nest 312A, and the multiple elastic parts 11 of the insert molding die part 10 are positioned by the positioning means so that their movement is restricted within the die 100 and arranged in the circumferential direction, thereby forming the tubular part 22.

[0048] 1, 2(a) and 3(a), in the present embodiment 1, a plurality of elastic parts 11 are arranged in the circumferential direction so that the interval between adjacent elastic parts 11 gradually increases from one end side to the other end side to form a substantially truncated cone-shaped cylindrical part 22. That is, by arranging a plurality of elastic parts 11 in the circumferential direction so that the interval between adjacent elastic parts 11 is wider at the thicker other end side (base end side) than at the thinner curved one end side (tip end side), a substantially truncated cone-shaped cylindrical part 22 is formed in the mold 100 in a tapered shape that increases in diameter from one end side to the other end side.

[0049] Thus, in this embodiment 1, a plurality of elastic portions 11 having a leaf spring shape are arranged in the circumferential direction with the spacing between adjacent portions gradually increasing from one end side, which is thin and curved toward the tip side, toward the opposite end side, thereby forming a cylindrical portion 22 having an approximately truncated cone shape and being mounted within the movable side mold plate 312.

[0050] In particular, in this embodiment 1, in the initial state in which multiple elastic portions 11 are arranged in the mold 100 in a circumferential direction, i.e., in a cylindrical (annular) shape, to form a tubular portion 22, the multiple elastic portions 11 forming the tubular portion 22 are arranged with a small gap between adjacent elastic portions 11, even at the tips of their thin, curved one end side, as shown in Figures 2(a) and 3(a). As described below, when an insert part 50 is inserted into the inside (inside the cylinder) of the smaller diameter end side (smaller diameter annular side) of the tubular portion 22, and an external force is applied from the outside (outside the cylinder) to the tubular portion 22 in the mold 100 by, for example, clamping the mold 100, as shown in Figures 2(b), 3(b), and 6(b), the thin and curved one end side of each elastic portion 11 bends, the smaller diameter one end side of the tubular portion 22 contracts in diameter, and adjacent elastic portions 11 at the smaller diameter one end side of the tubular portion 22 come close to or come into contact with each other to form annular portions 21, and the multiple elastic portions 11 at the annular portions 21 that are close to or come into contact with each other at the smaller diameter one end side of the tubular portion 22 elastically contact the outer peripheral surface of the insert part 50, thereby elastically holding (elastically holding) the insert part 50 in its entire circumferential direction. Here, the annular portion 21 in which adjacent elastic portions 11 are close to or abutting each other does not require that the elastic portions 11 be in strict contact with each other. In order to reduce the load caused by contact between the elastic portions 11, a clearance (e.g., 0.1 mm or less, preferably 0.08 mm or less, and more preferably 0.05 mm or less) sufficient to prevent resin from leaking between adjacent elastic portions 11 is permitted, and it is sufficient for the annular portion 21 to be approximately continuous in the circumferential direction with multiple elastic portions 11.

[0051] Furthermore, in the first embodiment, the shaft portion 31 is passed through the inside (inside the cylinder) of the cylindrical portion 22 formed in the mold 100 by arranging a plurality of elastic portions 11 in the circumferential direction. The shaft portion 31 of the first embodiment has a small diameter shaft portion 31a formed on one end side in the axial direction (length direction), and a large diameter shaft portion 31b continuous therewith and having a larger diameter than the small diameter shaft portion 31a. The shaft portion 31 is disposed in a cylinder such that the small diameter shaft portion 31a side corresponds to the small diameter end side of the cylindrical portion 22 and the large diameter shaft portion 31b side corresponds to the large diameter other end side of the cylindrical portion 22, and is passed through the cylindrical portion 22 such that a part of the small diameter shaft portion 31a close to the large diameter shaft portion 31b is positioned inside the cylinder on the small diameter end side of the cylindrical portion 22, but the remaining part of the small diameter shaft portion 31a on the opposite side to the large diameter shaft portion 31b side is positioned outside the cylinder on the small diameter end side of the cylindrical portion 22. The shaft portion 31 is disposed on the axis O of the cylindrical portion 22, and is positioned and disposed in the movable side mold plate 312 by a positioning means (not shown) or the like.

[0052] Then, the insert part 50 is attached to the small diameter shaft portion 31a of the shaft portion 31 that is passed through the inside of the cylindrical portion 22, and the insert part 50 is inserted into the cylinder on the small diameter one end side of the cylindrical portion 22. At this time, in the present embodiment 1, as shown in Figures 3, 5, etc., the insert part 50 is fitted around the small diameter shaft portion 31a, and the insert part 50 is passed through the shaft portion 31 until one axial end face of the insert part 50 abuts against the step surface 32 at the boundary between the small diameter shaft portion 31a and the large diameter shaft portion 31b, thereby positioning the insert part 50 inside the cylinder (inside the annular shape) on the small diameter one end side of the cylindrical portion 22. Note that, in the mold 100, the axis O direction of the cylindrical portion 22 is the same direction as the mold clamping direction, and the shaft portion 31 is disposed with its axial direction coinciding with the mold clamping direction.

[0053] Thus, in the present embodiment 1, a cylindrical portion 22 is formed by disposing a plurality of elastic portions 11 in the circumferential direction in the mold 100 with the mutual spacing between adjacent elastic portions gradually increasing from one end (tip end) side toward the other end (base end) side, and further, a shaft portion 31 is passed through the inside of the cylindrical portion 22 on its axis O. At this time, these mold parts 10 for insert molding are disposed in a position facing the cavity 400 side in the movable-side mold plate 312 of the movable-side mold 300. In addition, in the mold 100, the plurality of elastic portions 11 and the shaft portion 31 are held by a positioning means (not shown) or the like.

[0054] That is, as a process for mounting the insert molding mold parts, as shown in FIG. 4, a plurality of elastic parts 11 are arranged circumferentially within the mold 100 so that the spacing between adjacent parts gradually increases from one end side to the other end side, thereby forming a tapered tubular part 22 whose diameter increases from one end side to the other end side, and further, a shaft part 31 is passed inside the tubular part 22 on its axis O, thereby mounting the insert molding mold part 10 having the plurality of elastic parts 11 forming the tubular part 22 and the shaft part 31 passing inside the tubular part 22.

[0055] Then, in the insert part insertion step, the insert molding die 100 to which the insert molding die part 10 is attached in the insert molding die part attachment step is inserted into the cylinder at the small-diameter end side of the cylindrical part 22 by attaching (outside fitting) the insert part 50 to the one end side of the shaft part 31 through the through hole 51 of the insert part 50, as shown in FIG. 5. In this insert part insertion step, when the insert part 50 is attached to the shaft part 31 and inserted into the one end side, which is the small-diameter annular side of the cylindrical part 22, the fixed side die 200 and the movable side die 300 are separated from each other and the mold is opened. The attachment of the insert part 50 at this time can be performed by a person or a robot.

[0056] That is, in the insert part insertion process, the tapered tubular portion 22 is formed in the movable side mold plate 312 of the movable side mold 300 and is composed of a plurality of elastic portions 11 arranged in the circumferential direction with the spacing between adjacent portions gradually increasing from one end side to the opposite end side. The tapered tubular portion 22 is made of a thin, curved elastic portion 11 and is formed in the movable side mold plate 312 of the movable side mold 300. The insert part 50 is attached to one axial end side (small diameter shaft portion 31a) of the shaft portion 31 that passes through the inside of the tapered tubular portion 22, and the insert part 50 is inserted into the tube at the small diameter end side of the tubular portion 22 from the small diameter end side of the tubular portion 22 to the large diameter end side on the opposite side. At this time, in the present embodiment 1, the insert part 50 is positioned by inserting the insert part 50 into the cylinder on the small diameter end side of the cylindrical part 22 until one end face (tip face) of the insert part 50, which is one end side in the axial direction, is abutted against the step surface 32 of the shaft part 31. That is, in the present embodiment 1, the shaft part 31 is inserted into the cylindrical part 22 so that the step surface 32 between the small diameter shaft part 31a and the large diameter shaft part 31b of the shaft part 31 is positioned inside the cylinder on the small diameter end side of the cylindrical part 22, and the insert part 50 is fitted into the shaft part 31 until it abuts against the step surface 32 of the shaft part 31 and is fitted externally to the shaft part 31, so that the insert part 50 is positioned in a state inserted into the small diameter side cylinder of the cylindrical part 22 formed by the multiple elastic parts 11. Note that by providing a magnet such as a magnet (not shown) on the large diameter shaft part 31b on the step surface 32 side of the shaft part 31, the positioning accuracy of the metal insert part 50 can be improved.

[0057] Here, in the first embodiment, in the initial state of the cylindrical portion 22 formed of the multiple elastic portions 11, the minimum diameter (inner diameter) r1 (see FIG. 4(b)) of the discontinuous annular shape at one end of the small diameter side of the cylindrical portion 22 is set to be maximum, and the maximum dimensional tolerance R of the maximum outer diameter R (see FIG. 4(b)) of the circular cross section at one end of the axial direction on the insertion side of the insert part 50 into the cylindrical portion 22 is set to be maximum. max The diameter is set slightly larger than (r1>R max). That is, in the present embodiment 1, even if the insert part 50 is inserted into the cylinder on the small-diameter end side of the cylindrical part 22, before an external force is applied from both directions in the axial line O direction of the cylindrical part 22 by clamping the mold 100 or the like, the cylindrical part 22 does not undergo elastic deformation, and the annular minimum diameter (inner diameter) r1 of the small-diameter end of the cylindrical part 22 remains maximum, and as shown in FIG. 2(a) and FIG. 3(a), the interval between adjacent elastic parts 11 does not change even at the tip of the small-diameter end side of the cylindrical part 22, and a small gap is formed between the adjacent elastic parts 11. Therefore, it is easy to insert the axial end side of the insert part 50 into the cylinder on the small-diameter end side of the cylindrical part 22 from the small-diameter end side of the cylindrical part 22 toward the opposite large-diameter other end side. In addition, by arranging adjacent elastic parts 11 with a gap between them at the tip of one end side which is thin and curved in the initial state, even when the diameter of one end side of the elastic parts 11 is reduced, load is unlikely to be applied to each other.

[0058] Then, the insert part 50 is fitted onto the small diameter shaft portion 31a, which is one axial end side of the shaft portion 31 arranged on the axis O of the tubular portion 22, and one axial end side of the insert part 50 is inserted into the small diameter tube on the one end side of the tubular portion 22 formed by the multiple elastic portions 11. In this state, as an insert part holding process, an external force is applied to the tubular portion 22 in the same direction as the axis O of the tubular portion 22, i.e., in the mold clamping direction. As shown in Figures 2(b), 3(b) and 6, the multiple elastic portions 11 forming the tubular portion 22 bend and elastically contact the outer peripheral surface of the insert part 50, elastically holding the insert part 50 in the radial direction throughout its entire circumferential direction.

[0059] In the present embodiment 1, by clamping the fixed-side mold 200 and the movable-side mold 300, an external force is applied from the outside (outside the cylinder) to the cylindrical portion 22 in the movable-side mold 300 in the same direction as the axis O direction of the cylindrical portion 22, so that the thin and curved one end side of each elastic portion 11 forming the cylindrical portion 22 is bent, the annular portion on the small-diameter one end side of the cylindrical portion 22 is elastically deformed in the diameter-reducing direction, and the adjacent elastic portions 11 arranged in the circumferential direction on the small-diameter one end side of the cylindrical portion 22 approach or abut each other to form the annular portion 21. Then, in the annular portion 21 formed by the plurality of elastic portions 11 approaching or abutting each other on the small-diameter one end side of the cylindrical portion 22, the plurality of elastic portions 11 elastically contact the outer periphery of the insert part 50 inserted on the small-diameter one end side of the cylindrical portion 22, and elastically hold the insert part 50 in the radial direction over its entire circumferential direction. As shown in FIG. 6, the portion of the insert part 50 that is not inserted into the cylindrical portion 22 is exposed in the cavity 400 formed between the fixed mold 200 and the movable mold 300 by mold clamping.

[0060] That is, in this embodiment 1, when the fixed side mold 200 and the movable side mold 300 are clamped, one end side of each elastic portion 11 forming the tubular portion 22 is in the shape of a thin, curved, elastic leaf spring, so that due to the external force applied in the mold clamping direction when the fixed side mold 200 and the movable side mold 300 are clamped, that is, due to the external force applied in the same direction as the axis O direction of the tubular portion 22, the thin, curved one end side of each elastic portion 11 forming the tubular portion 22 bends, and the smaller diameter one end side of the tubular portion 22 elastically deforms in the diameter reduction direction, and adjacent elastic portions 11 arranged in the circumferential direction at the smaller diameter one end side of the tubular portion 22 come close to or come into contact with each other to form the annular portion 21. Then, multiple elastic portions 11, which are close to or abutting each other to form an annular portion 21 at the smaller diameter end side of the tubular portion 22, elastically contact the entire circumference (outer surface) of the insert part 50 inserted into the tube on the smaller diameter side of the tubular portion 22, and elastically hold the insert part 50.

[0061] More specifically, in the initial state, as shown in Figures 2(a) and 3(a), the multiple elastic portions 11 forming the tubular portion 22 are arranged in the mold 100 such that their curved, thin end sides are slightly spaced from each other in the circumferential direction to form discontinuous, small-diameter rings, and the spacing between them gradually increases from the one end side to the other end side. At this time, the minimum diameter (inner diameter) r1 (see FIG. 4(b)) of the discontinuous circular shape at one end of the small diameter side of the cylindrical portion 22 is set to be maximum, and the maximum dimensional tolerance R of the maximum outer diameter R (see FIG. 4(b)) of the cross-sectional circle at one end of the axial direction on the insertion side of the insert part 50 into the cylindrical portion 22 is set to be maximum. max It is set slightly larger than the Furthermore, even when the insert part 50 is inserted into the tube at the smaller diameter end of the tubular portion 22, no elastic deformation of the tubular portion 22 occurs before external forces are applied from both directions in the axial direction O of the tubular portion 22 by clamping the mold 100, etc., and the annular minimum diameter (inner diameter) r1 of the smaller diameter end of the tubular portion 22 remains at its maximum, and even at the tip of the smaller diameter end of the tubular portion 22, the distance between adjacent elastic portions 11 does not change, and a small gap is formed between adjacent elastic portions 11.

[0062] In this state, that is, with the insert part 50 inserted into the cylinder on the small-diameter end side of the cylindrical part 22, the fixed-side mold 200 and the movable-side mold 300 are clamped, and an external force in the clamping direction generated by clamping the fixed-side mold 200 and the movable-side mold 300, that is, an external force in the same direction as the axis O direction of the cylindrical part 22, is applied to the cylindrical part 22, as shown in Figs. 2(b), 3(b) and 6, at the end side forming the small-diameter ring of the cylindrical part 22, the curved end side formed in a thin thickness of each elastic part 11 is bent, and the elastic parts 11 arranged in the circumferential direction at the end side on the small-diameter side of the cylindrical part 22 are reduced in diameter in a direction narrowing the intervals between each other, and the adjacent elastic parts 11 come close to each other or come into contact with each other to form the ring part 21. Note that, here, the minimum value R of the dimensional tolerance of the maximum outer diameter R (see Fig. 4(b)) of the insert part 50 is min The elastic portions 11 are designed to abut against each other when the minimum value R minIn larger ones, adjacent elastic portions 11 are close to each other with a clearance (for example, 0.1 mm or less, preferably 0.08 mm or less, more preferably 0.05 mm or less) that does not allow resin to leak between adjacent elastic portions 11. Then, at the smaller diameter end side of the cylindrical portion 22, the multiple elastic portions 11 abut or come into close contact with each other at the annular portions 21, which are in close proximity to each other, and elastically contact (press against) the outer circumferential surface of the insert part 50 inserted into the smaller diameter side of the cylindrical portion 22. As a result, the entire circumferential direction of the insert part 50 is elastically held in the radial direction by the multiple elastic portions 11 that form the cylindrical portion 22.

[0063] In this insert part holding process, the multiple elastic parts 11 arranged around the insert part 50 are brought into close contact with the entire outer periphery of the insert part 50, so that the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction around its entire periphery. In the subsequent molding process, as shown in FIG. 7, resin 60 is injected toward the cavity 400 formed between the fixed side mold 200 and the movable side mold 300 of the insert molding die 100, and the cavity 400 between the fixed side mold 200 and the movable side mold 300 is filled with the resin 60, so that the resin 60 flows around the outer periphery of the insert part 50 exposed within the cavity 400, and as the resin 60 solidifies, the insert part 50 and the resin 60 are molded integrally to form an insert resin molded product 700.

[0064] That is, the fixed-side mold 200 and the movable-side mold 300 are clamped, and the multiple elastic portions 11 elastically contact the outer peripheral surface of the insert part 50 at the annular portion 21 that is close to or abuts each other in the circumferential direction at one end side of the small diameter side of the tubular portion 22 formed by the multiple elastic portions 11 in the mold 100, and the insert part 50 is elastically held in its entire circumferential direction by the multiple elastic portions 11 at the annular portion 21 on the small diameter end side of the tubular portion 22. In this state, resin 60 is injected from the nozzle N of the injector set on the fixed-side mounting plate 211 side of the fixed-side mold 200, and the resin 60 passes through flow paths such as a sprue, runner, and gate formed in the fixed-side mold 200 to fill the cavity 400, and the resin 60 flows around the outer periphery of the insert part 50 exposed in the cavity 400. The resin 60 solidifies, and an insert resin molded product 700 in which the insert part 50 and the resin 60 are integrated is formed.

[0065] In the first embodiment, the shaft portion 31 is inserted into the through hole 51 of the insert part 50 up to the position of the other axial end face exposed to the cavity 400 in the insert part 50, so that the resin 60 does not enter the through hole 51 of the insert part 50. At this time, the elastic portions 11 of the tubular portion 22 that elastically hold the insert part 50 in the radial direction over its entire circumferential direction are held in the movable mold 300 by a positioning means (not shown) as described above, so that even if the injection pressure of the resin 60 or the holding pressure is applied, the elastic portions 11 that form the tubular portion 22 are unlikely to shift in position. Furthermore, the insert part 50 is fitted onto the shaft portion 31 arranged on the axis O of the tubular portion 22 and is radially tightened and held in place by multiple elastic portions 11 around its entire circumferential direction, so that even when the injection pressure and holding pressure of the resin 60 are applied, misalignment is unlikely to occur.

[0066] In this embodiment 1, adjacent elastic portions 11 are located close to or in contact with each other at the smaller diameter end of the tubular portion 22 within the mold 100, forming an annular portion 21, whereby the elastic portions 11 elastically contact the outer peripheral surface of the axial end of the insert part 50 around its entire circumference, and the annular portion 21 elastically holds the insert part 50 in the radial direction around its entire circumference, thereby preventing resin 60 from flowing around the outer periphery of the axial end of the insert part 50. In other words, in this embodiment 1, when an external force due to mold clamping is applied to the tubular portion 22, the multiple elastic portions 11 elastically deform in the diameter reduction direction at one end side of the smaller diameter side of the tubular portion 22, so that adjacent elastic portions 11 approach or abut each other to form a substantially continuous annular portion 21, and in the annular portion 21, the multiple elastic portions 11 elastically contact the entire circumference of the outer circumferential surface on the axial end side of the insert part 50, thereby elastically maintaining the insert part 50 in the radial direction from the entire circumferential direction.Therefore, the elastic deformation of the multiple elastic portions 11 forming the tubular portion 22 allows the multiple elastic portions 11 to be tightly adhered to the entire circumferential direction of the insert part 50 in accordance with the outer diameter of the insert part 50. Therefore, even if there is variation in the dimensional accuracy of the insert part 50, the variation is absorbed, and adjacent elastic parts 11 are close to or in contact with each other to tightly adhere multiple elastic parts 11 to the entire outer periphery of the insert part 50 in the substantially continuous annular part 21, which prevents the resin 60 from entering the outer periphery of one axial end side of the insert part 50 and leaking (overflowing) to the movable side mold plate 312 side (the insert 312A side). Therefore, the occurrence of burrs can be suppressed.

[0067] As a result, the insert resin molded product 700 can have a high-quality appearance. In addition, since the burden of removing burrs after molding can be reduced, the insert resin molded product 700 has a good molding cycle and high productivity. In addition, the insert resin molded product 700 can be prevented from having a deteriorated function due to burrs. For example, when burrs (resin) penetrate, partial pressure (resin pressure) is applied to the insert part 50, which may cause deformation of the insert part 50, but this can be prevented. In addition, for example, when a collar member is used as the insert part 50 and a fastening member such as a bolt is inserted into the collar member of the insert resin molded product 700 to make a product, if burrs remain at the axial end of the collar member, when a shaft-shaped fastening member such as a bolt is attached to the collar member and fastened to another member, creep may occur due to the burrs, reducing the axial force of the bolt, and the function of the insert resin molded product 700 and the value of the product may be reduced. In contrast, in the first embodiment, burrs can be prevented, so that the deteriorated function of the insert resin molded product 700 due to the burrs can be prevented. Furthermore, by inserting the threaded portion of a bolt or the like into the collar member and tightening the bolt or the like in this manner, the bottom surface of the head of the bolt or the like abuts against the collar member and the tightening force of the bolt or the like can be received by the collar member, thereby preventing damage to the insert resin molded product 700 which is fixed to the object to be attached.

[0068] In particular, the elastic deformation of the multiple elastic parts 11 arranged over the entire circumferential direction of the insert part 50 causes adjacent elastic parts 11 to approach or come into contact with each other, and the multiple elastic parts 11 are in elastic contact from the entire circumferential direction of the insert part 50 in the radial direction in the annular part 21 that is approximately continuous in the circumferential direction. Therefore, even if there is variation in the dimensions and shape of the insert part 50, the variation is absorbed and no gap is generated between the entire circumferential direction of the insert part 50 and the movable side mold plate 312 (inserted part 312A) side. In addition, excessive load is not applied in a certain direction. Therefore, deformation of the insert part 50 can be suppressed. In addition, since the multiple elastic parts 11 are elastically held in contact with each other in the radial direction from the outer circumferential surface of the insert part 50 by the elastic deformation, even if there is a shift in the mold clamping of the mold 100 or a mold clamping failure, the insert part 50 is unlikely to be deformed.

[0069] Furthermore, in the present embodiment 1, the one end side of the plurality of elastic parts 11 forming the cylindrical part 22 is bent by clamping the mold 100, and elastically contacts the outer peripheral surface of the insert part 50, wrapping and holding the entire circumferential direction of the insert part 50. As shown in Fig. 8, when the mold 100 is opened and the clamping force is released, the elastic deformation of the one end side of the cylindrical part 22 that elastically holds the insert part 50 returns to its original state, and the interval between the one end sides of the elastic parts 11 expands to the original state (initial state) where a slight gap is generated between them, and the holding of the insert part 50 by the plurality of elastic parts 11 is released, so that the insert resin molded product 700 can be easily released from the mold. Note that the insert resin molded product 700 remaining on the movable side mold plate 312 (inserted part 312A) side in Fig. 8 is ejected by the ejector pin 316 via the ejector plate 314 by utilizing the operation of the ejector rod 321 of the injection molding device, as shown in Fig. 9. After the insert resin molded product 700 is released and removed from the mold, the ejector rod 321 of the injection molding device is retracted, and the ejector pin 316 is retracted axially by the repulsive force of the return spring 318, returning it to its original position before ejection.

[0070] Thus, in the present embodiment 1, the multiple elastic parts 11 of the insert molding die part 10 are arranged in the circumferential direction, i.e., in a cylindrical (annular) shape, so that the spacing between adjacent elastic parts 11 gradually increases from one end side to the other end side on the opposite side, and the tapered cylindrical part 22 is formed. The insert part 50 is fitted onto the shaft part 31 arranged on the axis O of the cylindrical part 22, and the insert part 50 is inserted into the small-diameter cylinder formed at the thin and curved one end side of the multiple elastic parts 11 in the cylindrical part 22. When the mold 100 is closed in this state, the external force applied in the mold closing direction by the mold closing, i.e., the external force in the same direction as the axis O direction of the tubular portion 22, causes the thin, curved one end side of the elastic portion 11 forming the small-diameter, discontinuous annular side of the tubular portion 22 to bend toward the radially inward direction of the tubular portion 22, causing the tubular portion 22 to elastically deform in the diameter-reducing direction, and multiple elastic portions 11 adjacent to each other in the circumferential direction come close to or abut against each other to form a circumferentially approximately continuous annular portion 21, and in the annular portion 21 of the tubular portion 22, the multiple elastic portions 11 elastically contact the outer peripheral surface of the insert part 50, and elastically hold the insert part 50 in the radial direction throughout its entire circumferential direction.

[0071] Therefore, even if the insert part 50 has variations due to dimensional accuracy, the multiple elastic parts 11 forming the cylindrical part 22 contact the outer peripheral surface of the insert part 50 without any gaps due to elastic deformation in response to the outer diameter dimension of the insert part 50, so that it is difficult to generate a small gap between the movable side mold plate 312 side and the insert part 50. That is, the small-diameter annular side of the cylindrical part 22 is reduced in diameter in the radial direction due to elastic deformation of the multiple elastic parts 11 forming the cylindrical part 22, and the insert part 50 is fastened from the entire outer peripheral direction toward the radial direction by the substantially continuous annular part 21 formed by the multiple elastic parts 11 adjacent to each other in the circumferential direction, and the multiple elastic parts 11 are brought into close contact with the entire circumferential direction of the insert part 50, so that it is difficult to generate a gap between the movable side mold plate 312 side and the insert part 50. Therefore, it is possible to enhance the effect of suppressing the generation of burrs. In addition, the multiple elastic portions 11 elastically hold the insert part 50 by wrapping around the entire circumferential direction, and as a result, partial pressure is not easily applied and the pressure is dispersed, making it difficult for elastic marks to be left on the insert part 50 and reducing the risk of compromising the design of the exposed surface of the insert part 50, and the insert part 50 can be firmly held and fixed without being damaged.

[0072] In particular, since each elastic portion 11 in the present embodiment 1 has a curved end portion with a thin thickness, the end portion is easily deflected in the diameter-reducing direction by an external force, and the adhesion to the outer circumferential surface of the insert part 50 can be improved. Therefore, the occurrence of burrs can be further suppressed.

[0073] In addition, in the above-mentioned embodiment 1, the small-diameter end side of the tubular portion 22 formed by arranging multiple elastic portions 11 in the circumferential direction within the mold 100 elastically deforms in the diameter-reducing direction due to an external force applied from the outside, thereby elastically holding and tightening the insert part 50 inserted into the small-diameter end side of the tubular portion 22 in the radial direction over the entire circumferential direction.Before an external force is applied from the outside, the diameter of the one end side of the tubular portion 22 is expanded, making it easy to insert the insert part 50 into the tubular portion 22.

[0074] In addition, in the present embodiment 1, the insert part 50 is fitted onto the shaft part 31 that is passed through the cylindrical part 22 and disposed on the axis O of the cylindrical part 22, so that the positioning of the insert part 50 can be easily performed. In particular, the axial end of the shaft part 31 that is passed through the cylindrical part 22 consisting of a plurality of elastic parts 11 arranged in the circumferential direction is inserted into the through hole 51 of the cylindrical (hollow) insert part 50, and the end face on one axial side of the insert part 50 is abutted (butted) against the step surface 32 of the shaft part 31, and the positioning is performed by a magnet such as a magnet, so that the cylindrical part 22 and the insert part 50 are concentric, and the insert part 50 that is disposed in the cylinder on the small diameter side that is one end side of the cylindrical part 22 can be accurately positioned, and the positioning accuracy of the insert part 50 that is elastically held in the radial direction from the entire circumferential direction by the plurality of elastic parts 11 that form the cylindrical part 22 can be improved. Therefore, even when the resin 60 is injected, the insert part 50 is unlikely to shift in position, allowing the insert part 50 to be stably elastically held by the cylindrical part 22, and deformation of the insert part 50 due to the injection pressure can be prevented. This prevents the insert part 50 from shifting in position and deforming, and further enhances the effect of suppressing the occurrence of burrs. Furthermore, if the shaft part 31 is disposed on the axis O of the cylindrical part 22 in the mold 100 and passes through the through hole 51 formed in the insert part 50, it can be easily manufactured and the part cost can be kept low.

[0075] In this way, since it is difficult to cause the insert part 50 to shift in position, the multiple elastic parts 11 can be precisely brought into contact with the outer peripheral surface of the insert part 50 without any gaps, and the multiple elastic parts 11 can be elastically contacted in the radial direction approximately uniformly over the entire circumferential direction of the insert part 50, making it difficult to cause partial load. Furthermore, by inserting the shaft part 31 into the through hole 51 of the insert part 50, it is possible to counteract external pressure, and deformation and crushing of the insert part 50 can be prevented even when a large injection pressure or the like is applied to the insert part 50. Therefore, it is possible to enhance the effect of preventing deformation of the insert part 50 and preventing burrs from occurring.

[0076] As described above, the insert molding mold part 10 of the above-mentioned embodiment 1 is formed of a plurality of elastic parts 11 arranged circumferentially within the mold 100 with the spacing between adjacent parts increasing from one end side to the other end side, and is provided with a tapered tubular part 22 that increases in diameter from one end side to the other end side, and the tubular part 22 elastically contacts the outer peripheral surface of the insert part 50 inserted into the tubular part 22 at an annular part 21 where the plurality of elastic parts 11 elastically deform radially at one end side and adjacent elastic parts 11 are close to or abut against each other, thereby elastically holding the insert part 50 in the radial direction over its entire circumferential direction.

[0077] According to the insert molding mold part 10 of the above embodiment 1, the tapered tubular part 22 is formed of a plurality of elastic parts 11 arranged circumferentially within the mold 100 with the spacing between adjacent parts increasing from one end side to the other end side. When an external force is applied from the outside by mold clamping or the like to the tapered tubular part 22 which increases in diameter from one end side to the other end side, one end side of the plurality of elastic parts 11 elastically deforms toward the radial inside of the tubular part 22 (in the direction of reducing diameter), and adjacent elastic parts 11 approach and come into contact with each other to form annular part 21, and the plurality of elastic parts 11 at the annular part 21 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular part 22, and elastically maintains the insert part 50 in the radial direction for the entire circumferential direction.

[0078] In other words, a plurality of elastic portions 11 are arranged circumferentially within the mold 100 with the spacing between them increasing from one end side to the other end side to form a tubular portion 22, and when an external force is applied to the tubular portion 22 from the outside, the spacing between adjacent elastic portions 11 in the circumferential direction changes due to elastic deformation of the plurality of elastic portions 11 at the smaller diameter end side of the tubular portion 22, and the tubular portion 22 reduces in diameter, causing adjacent elastic portions 11 to approach or abut against each other to form a ring-shaped portion 21 that is approximately continuous in the circumferential direction, and the plurality of elastic portions 11 elastically contact the outer peripheral surface of the insert part 50 at the ring-shaped portion 21, where the plurality of elastic portions 11 are in close proximity to or abutting each other, so that the insert part 50 is elastically held in the radial direction throughout its entire circumferential direction by the ring-shaped portion 21 in which the plurality of elastic portions 11 are in close proximity to or abutting each other.

[0079] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes the adjacent elastic parts 11 to approach or abut against each other, and the multiple elastic parts 50 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if the dimensional accuracy of the insert part 50 varies, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby improving the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, according to the insert molding die component 10 of the first embodiment, deformation of the insert component 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0080] In particular, in the above-mentioned embodiment 1, the one end side of the smaller diameter side of the tubular portion 22 formed by the circumferential arrangement of multiple elastic portions 11 within the mold 100 is bent and elastically deformed in the diameter reduction direction of the tubular portion 22 due to an external force applied from the outside, i.e., an external force in the same direction as the axis O of the tubular portion 22 applied by clamping the mold 100, etc., so that one end side of the multiple elastic portions 11 bends and elastically deforms in the diameter reduction direction of the tubular portion 22, whereby one end sides of adjacent elastic portions 11 in the circumferential direction come close to or abut each other to form a ring-shaped portion 21 that is approximately continuous in the circumferential direction, and the insert part 50 in which the multiple elastic portions 11 are inserted into the one end side of the tubular portion 22 is elastically held in the radial direction throughout the entire circumferential direction.

[0081] That is, according to the insert molding die part 10 of the first embodiment, the insert part 50 is inserted into the small-diameter end of the cylindrical part 22 formed by arranging the multiple elastic parts 11 in the die 100 with the mutual intervals between adjacent elastic parts 11 expanded from one end side to the other end side, and when an external force is applied in the same direction as the axis O direction of the cylindrical part 22 by clamping the die 100 in this state, the multiple elastic parts 11 forming the cylindrical part 22 are elastically deformed in the diameter-reducing direction, and the adjacent elastic parts 11 approach and abut each other to form the annular part 21, and the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction throughout the entire circumferential direction in the annular part 21. Therefore, the insert part 50 can be easily inserted into the small-diameter cylindrical inner side of the cylindrical part 22.

[0082] According to the insert molding die part 10 of the first embodiment, each elastic part 11 has one end side formed thin and curved leaf spring shape, and one end side of each elastic part 11 in the cylindrical part 22 is easily bent and elastically deformed in the diameter reduction direction by an external force applied from the outside of the cylindrical part 22 in the same direction as the axis O direction of the cylindrical part 22. That is, one end side (tip side) of each elastic part 11 in the cylindrical part 22 is easily bent and elastically deformed by an external force applied in the same direction as the axis O direction of the cylindrical part 22, and the adhesion to the insert part 50 can be improved. Therefore, the effect of suppressing the generation of burrs can be further improved.

[0083] Furthermore, according to the insert molding die part 10 of the above-mentioned embodiment 1, since the shaft part 31 is provided to pass through the cylindrical part 22 formed by the multiple elastic parts 11 in the die 100 and to position the insert part 50 inserted into the small-diameter end side of the cylindrical part 22, the positioning accuracy of the insert part 50 is improved, and even when the resin 60 is injected toward the cavity 400, the position of the insert part 50 is unlikely to be shifted, and the multiple elastic parts 11 can stably hold the elasticity of the insert part 50, and deformation of the insert part 50 due to the injection pressure can be prevented. That is, the shaft part 31, which is disposed on the axis O of the cylindrical part 22 in the die 100 and passed through the through hole 51 formed in the insert part 50, guides the insert part 50 into the cylinder on the small-diameter side of the cylindrical part 22, and improves the positioning accuracy of the insert part 50. Therefore, the positioning and deformation of the insert part 50 can be prevented, and the effect of suppressing the occurrence of burrs can be further improved. In particular, the shaft portion 31 that is disposed on the axis O of the cylindrical portion 22 inside the mold 100 and passes through the through hole 51 formed in the insert part 50 can be easily manufactured and requires low component costs.

[0084] Moreover, the insert molding die 100 of the above-mentioned embodiment 1 is an insert molding die 100 having a fixed side die 200 and a movable side die 300, and forming a cavity 400 between the fixed side die 200 and the movable side die 300 by clamping, and is formed by a plurality of elastic parts 11 arranged in the circumferential direction within the fixed side die 200 or the movable side die 300, with the spacing between adjacent parts expanding from one end side toward the opposite other end side, and is provided with a tapered tubular part 22 that expands in diameter from one end side toward the other end side, and the tubular part 22 has an annular part 21 where the plurality of elastic parts 11 elastically deform in the radial direction at its one end side and adjacent elastic parts 11 are close to or abut against each other, whereby the plurality of elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular part 22, and elastically holds the insert part 50 in the radial direction over its entire circumferential direction.

[0085] According to the insert molding die 100 of the above embodiment 1, the tapered tubular portion 22 is formed of a plurality of elastic portions 11 arranged circumferentially within the fixed side die 200 or the movable side die 300 with the spacing between adjacent portions expanding from one end side to the other end side, and when an external force is applied from the outside by mold clamping or the like to the tapered tubular portion 22 which expands in diameter from one end side to the other end side, one end side of the plurality of elastic portions 11 elastically deforms toward the radial inside of the tubular portion 22 (in the direction of reducing diameter), and adjacent elastic portions 11 approach and come into contact with each other to form annular portion 21, and the plurality of elastic portions 11 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular portion 22 at the annular portion 21, and elastically maintains the insert part 50 in the radial direction for the entire circumferential direction.

[0086] In other words, a plurality of elastic portions 11 are arranged in a mold 100 with the spacing between adjacent elastic portions 11 expanding from one end side to the other end side to form a tubular portion 22, and when an external force is applied to the tubular portion 22 from the outside, the spacing between adjacent elastic portions 11 in the circumferential direction changes due to elastic deformation of the plurality of elastic portions 11 at the smaller diameter end side of the tubular portion 22, and the diameter of the tubular portion 22 decreases, causing adjacent elastic portions 11 to approach or abut each other to form a ring-shaped portion 21 that is approximately continuous in the circumferential direction, and the plurality of elastic portions 11 elastically contact the outer peripheral surface of the insert part 50 at the ring-shaped portion 21, where the plurality of elastic portions 11 are adjacent to or abutting each other, so that the insert part 50 is elastically held in the radial direction throughout its entire circumferential direction by the ring-shaped portion 21 in which the plurality of elastic portions 11 are adjacent to or abutting each other.

[0087] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, according to the insert molding die 100 of the first embodiment, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0088] In particular, in the above-mentioned embodiment 1, the one end side of the smaller diameter side of the tubular portion 22 formed by the circumferential arrangement of multiple elastic portions 11 within the fixed side mold 200 or the movable side mold 300 is bent and elastically deformed in the diameter reduction direction of the tubular portion 22 due to an external force applied from the outside, i.e., an external force in the same direction as the axis O direction of the tubular portion 22 applied by clamping the fixed side mold 200 and the movable side mold 300, etc., so that one end sides of adjacent elastic portions 11 in the circumferential direction approach or abut each other to form an annular portion 21, and the insert part 50 in which the multiple elastic portions 11 are inserted into the one end side of the tubular portion 22 is elastically held in the radial direction throughout its entire circumferential direction.

[0089] That is, according to the insert molding die 100 of the first embodiment, the insert part 50 is inserted into the small-diameter end of the cylindrical part 22 formed by arranging the multiple elastic parts 11 in the fixed die 200 or the movable die 300 with the mutual intervals expanded from one end side to the other end side, and when an external force is applied in the same direction as the axis O direction of the cylindrical part 22 by clamping the fixed die 200 and the movable die 300 in this state, the multiple elastic parts 11 forming the cylindrical part 22 are elastically deformed in the diameter reduction direction, and the adjacent elastic parts 11 approach and abut each other to form a ring-shaped part 21 that is approximately continuous in the circumferential direction, and the multiple elastic parts 11 in the ring-shaped part 21 elastically hold the insert part 50 in the radial direction throughout the entire circumferential direction. Therefore, the insert part 50 can be easily inserted into the small-diameter cylindrical inner side of the cylindrical part 22.

[0090] According to the insert molding die 100 of the first embodiment, each elastic portion 11 has one end portion thereof formed thin and curved in the shape of a leaf spring, and one end portion of each elastic portion 11 in the cylindrical portion 22 is easily bent in the radial contraction direction and elastically deformed by an external force applied from the outside of the cylindrical portion 22 in the same direction as the axis O direction of the cylindrical portion 22. That is, one end portion (tip end portion) of each elastic portion 11 in the cylindrical portion 22 is easily bent and elastically deformed by an external force applied in the same direction as the axis O direction of the cylindrical portion 22, and the adhesion to the insert part 50 can be improved. Therefore, the effect of suppressing the generation of burrs can be further improved.

[0091] Furthermore, according to the insert molding die 100 of the first embodiment, the shaft portion 31 is provided to pass through the cylindrical portion 22 formed by the multiple elastic portions 11 and to position the insert part 50 inserted into the small-diameter end side of the cylindrical portion 22. This improves the positioning accuracy of the insert part 50, and even when the resin 60 is injected toward the cavity 400, the insert part 50 is unlikely to shift in position, making it possible to stably hold the elasticity of the insert part 50 by the multiple elastic portions 11, and also to prevent the insert part 50 from being deformed by the injection pressure. That is, the shaft portion 31 is disposed on the axis O of the cylindrical portion 22 in the die 100 and passed through the through hole 51 formed in the insert part 50, which guides the insert part 50 into the small-diameter side of the cylindrical portion 22, thereby improving the positioning accuracy of the insert part 50. This prevents the insert part 50 from being shifted in position and deformed, and further improves the effect of suppressing the generation of burrs. In particular, the shaft portion 31 that is disposed on the axis O of the cylindrical portion 22 inside the mold 100 and passes through the through hole 51 formed in the insert part 50 can be easily manufactured and requires low component costs.

[0092] The above description of the first embodiment has been given of a process for mounting a tapered cylindrical portion 22, which is formed of a plurality of elastic portions 11 arranged in the circumferential direction with the spacing between adjacent elastic portions 11 increasing from one end side to the other end side, in a fixed mold 200 or a movable mold 300; and a process for elastically deforming the plurality of elastic portions 11 in the diameter reducing direction at one end side of the cylindrical portion 22 by applying an external force from the outside to the cylindrical portion 22 into which the insert part 50 has been inserted, so that adjacent elastic portions 11 approach or abut against each other. This can also be regarded as an invention of a manufacturing method for an insert resin molded product 700, which includes an insert part holding process in which the insert part 50 is elastically held in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part 50 inserted into the tubular part 22 with the abutting annular part 21, and a molding process in which resin 60 is injected into a cavity 400 formed between the fixed side mold 200 and the movable side mold 300 in a mold clamped state and in which the insert part 50 is disposed, and the insert part 50 and the resin 60 are molded integrally to form the insert resin molded product 700.

[0093] According to the manufacturing method of the insert resin molded product 700 of the first embodiment, in the insert molding mold part mounting step, the multiple elastic parts 11 are arranged in the fixed mold 200 or the movable mold 300 in the circumferential direction with the mutual spacing between adjacent elastic parts 11 expanded from one end side toward the other end side to form the cylindrical part 22, and in the insert part holding step, the insert part 50 is inserted into the cylinder at one end side of the smaller diameter side of the cylindrical part 22 formed by the multiple elastic parts 11, and in this state, when an external force is applied from the outside to the cylindrical part 22, that is, the fixed mold 200 and When an external force is applied in the same direction as the axis O of the tubular portion 22 by clamping the movable mold 300, etc., the multiple elastic portions 11 forming the tubular portion 22 have elasticity, so that one end side of the multiple elastic portions 11 elastically deforms toward the radially inward direction of the tubular portion 22 (in the direction of reducing the diameter), and adjacent elastic portions 11 approach and come into contact with each other to form a ring-shaped portion 21 that is approximately continuous in the circumferential direction, and the multiple elastic portions 11 at the ring-shaped portion 21 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular portion 22, and elastically maintain the insert part 50 in the radial direction for the entire circumferential direction.

[0094] That is, the multiple elastic parts 11 are arranged in the mold 100 with the mutual intervals between adjacent elastic parts 11 expanded from one end side to the other end side to form the cylindrical part 22, and when an external force is applied to the cylindrical part 22, the intervals between adjacent elastic parts 11 change due to the elastic deformation of the multiple elastic parts 11 at the small-diameter one end side of the cylindrical part 22, the diameter of the cylindrical part 22 is reduced, and the adjacent elastic parts 11 approach or abut each other to form a ring-shaped part 21 that is approximately continuous in the circumferential direction, and the multiple elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 in the ring-shaped part 21, so that the insert part 50 is elastically held in the radial direction throughout its entire circumferential direction by the ring-shaped part 21 in which the multiple elastic parts 11 are adjacent or abutted. Then, in this state, in the molding process, the insert part 50 and the resin 60 are molded integrally to form the insert resin molded product 700.

[0095] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer periphery of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, according to the method for manufacturing the insert resin molded product 700 of the first embodiment, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0096] In particular, according to the manufacturing method of the insert resin molded product 700 of the first embodiment, the insert part 50 is inserted into the small-diameter end of the cylindrical part 22 formed by arranging the multiple elastic parts 11 in the fixed mold 200 or the movable mold 300 with the mutual intervals between them expanded from one end side to the other end side, and when an external force is applied in the same direction as the axis O direction of the cylindrical part 22 by clamping the fixed mold 200 and the movable mold 300 in this state, the multiple elastic parts 11 forming the cylindrical part 22 are elastically deformed in the diameter reduction direction, and the adjacent elastic parts 11 approach and abut each other to form the annular part 21, and the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction throughout the entire circumferential direction in the annular part 21. Therefore, the insert part 50 can be easily inserted into the small-diameter cylindrical inner side of the cylindrical part 22.

[0097] Furthermore, the description of the above embodiment 1 can also be considered as an invention of an insert molding method in which a plurality of elastic portions 11 are arranged in the fixed side mold 200 or the movable side mold 300 with the spacing between adjacent elastic portions 11 expanded from one end side toward the opposite other end side to form a tapered tubular portion 22 expanding in diameter from one end side toward the other end side, and an external force is applied from the outside to the tubular portion 22 into which the insert part 50 is inserted, whereby the adjacent elastic portions 11 are brought into close proximity or abutment with each other due to elastic deformation of the plurality of elastic portions 11 in the diameter-reducing direction on one end side of the tubular portion 22 to form an annular portion 21 that elastically contacts the insert part 50 inserted into the tubular portion 22 and elastically holds the insert part 50 in the radial direction over its entire circumferential direction, and in this state, a resin 60 is injected toward a cavity 400 formed between the clamped fixed side mold 200 and the movable side mold 300 in which the insert part 50 is arranged, thereby integrally molding the insert part 50 and the resin 60.

[0098] According to the insert molding method of the above-mentioned embodiment 1, when an insert part 50 is inserted into the tube of a tubular part 22 formed by a plurality of elastic parts 11 arranged in a mold 100 with the spacing between adjacent parts expanded from one end side toward the other end side, and an external force is applied to the tubular part 22 from the outside, that is, when an external force is applied in the same direction as the axis O direction of the tubular part 22 by clamping the fixed side mold 200 and the movable side mold 300, etc., the plurality of elastic parts 11 forming the tubular part 22 have elasticity, so that one end side of the plurality of elastic parts 11 elastically deforms toward the radial inside of the tubular part 22 (in the direction of reducing diameter), and adjacent elastic parts 11 approach and abut against each other to form an annular part 21, and the plurality of elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular part 22 at the annular part 21, and elastically maintains the insert part 50 in the radial direction for the entire circumferential direction.

[0099] That is, the multiple elastic parts 11 are arranged in the mold 100 with the mutual intervals between adjacent elastic parts 11 expanded from one end side to the other end side to form the cylindrical part 22, and when an external force is applied to the cylindrical part 22, the intervals between adjacent elastic parts 11 change due to the elastic deformation of the multiple elastic parts 11 at the small-diameter one end side of the cylindrical part 22, the diameter of the cylindrical part 22 is reduced, and the adjacent elastic parts 11 approach or abut each other to form a ring-shaped part 21 that is approximately continuous in the circumferential direction, and the multiple elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 in the ring-shaped part 21, so that the insert part 50 is elastically held in the radial direction throughout its entire circumferential direction by the ring-shaped part 21 in which the multiple elastic parts 11 approach or abut each other. In this state, the resin 60 is filled in the cavity 400 in which the insert part 50 is arranged, and the insert part 50 and the resin 60 are molded integrally with each other.

[0100] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, according to the insert molding method of the first embodiment, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0101] In particular, according to the insert molding method of the first embodiment, the insert part 50 is inserted into the small-diameter end of the cylindrical part 22 formed by arranging the multiple elastic parts 11 in the fixed mold 200 or the movable mold 300 with the mutual intervals between adjacent parts expanded from one end side to the other end side, and when an external force is applied in the same direction as the axis O direction of the cylindrical part 22 by clamping the fixed mold 200 and the movable mold 300 in this state, the multiple elastic parts 11 forming the cylindrical part 22 are elastically deformed in the diameter reduction direction, and the adjacent elastic parts 11 approach and abut each other to form the annular part 21, and the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction throughout the entire circumferential direction in the annular part 21. Therefore, the insert part 50 can be easily inserted into the small-diameter inner side of the cylindrical part 22.

[0102] 4 to 9, the tubular portion 22 is formed by mounting a plurality of elastic portions 11 to the nest 312A of the movable-side mold plate 312 of the movable-side mold 300, but when the present invention is implemented, the elastic portions 11 forming the tubular portion 22 may be mounted directly to the movable-side mold plate 312 not provided with the nest 312A, or may be mounted on the fixed-side mold plate 212 side of the fixed-side mold 200. Also, in the above-mentioned embodiment 1, in the initial state in which the plurality of elastic portions 11 are disposed in the mold 100 to form the tubular portion 22, adjacent elastic portions 11 are disposed with a slight gap between each other at the tips of the curved one end side, but when the present invention is implemented, adjacent elastic portions 11 may be disposed in contact with each other at the tips of the curved one end side in the initial state.

[0103] Here, in the above-mentioned first embodiment, a plurality of elastic portions 11, which are mutually independent parts, are arranged in the circumferential direction, i.e., in a cylindrical (annular) shape, with the spacing between adjacent elastic portions 11 expanded from one end side to the other end side within the mold 100, thereby forming the cylindrical portion 22 having a substantially truncated cone shape that forms a tapered shape. In this manner, the cylindrical portion 22 is formed by arranging the mutually independent elastic portions 11 in the circumferential direction within the mold 100, which makes it easy to mold the cylindrical portion 22.

[0104] However, when implementing the present invention, it is also possible to use a cylindrical portion 22A that is integrally molded. That is, as a first modification, as shown in Fig. 10, a cylindrical portion 22A may be used that is composed of a plurality of elastic portions 11 each having a thin, curved leaf spring shape at one end side, and an integral annular portion 25 in which the other end side opposite to the thin end side of the elastic portions 11 is integrated with each other. The tubular portion 22A of the first modified example is formed by, for example, dividing the side of a member molded into an approximately truncated cone shape into several parts in the circumferential direction by slit processing or the like, in which slits V that gradually become wider from one end to the other end are formed at predetermined intervals in the circumferential direction to form a plurality of elastic portions 11, thereby widening the spacing between adjacent elastic portions 11 from one end side to the other end side, and an integral annular portion 25 formed on the other end side of the plurality of elastic portions 11.

[0105] This cylindrical portion 22A has a plurality of elastic portions 11 formed by gradually increasing the slit width of the slit V from one end side to the other end side, and the adjacent elastic portions 11 are formed with an increased distance from one end side to the other end side, and the cylindrical portion 22A has a generally truncated cone shape with a tapered shape with an increased diameter from one end side to the other end side. That is, although an integral annular portion 25 is formed on the other end side, the portion from the integral annular portion 25 side to the one end side is formed of a plurality of separated (divided) elastic portions 11. Note that, even in the first modification, each elastic portion 11 has the same size and shape. The cylindrical portion 22A thus molded integrally is then attached to the mold 100, and the multiple elastic portions 11 of the cylindrical portion 22A elastically hold the insert part 50 in the radial direction over its entire circumferential direction.

[0106] In the above-mentioned first embodiment, the cylindrical portion 22 is formed by arranging a plurality of elastic portions 11, which are independent members, in the circumferential direction, i.e., in a cylindrical (annular) shape, in the mold 100, whereas in the first modification, the cylindrical portion 22A is integrally formed by a plurality of elastic portions 11 formed by increasing the spacing between adjacent elastic portions 11 from one end side toward the other end side, and an integral annular portion 25 connecting the other end sides of the plurality of elastic portions 11, and is attached to the mold 100. Note that when the cylindrical portion 22A of the first modification is attached to the mold 100, its movement is restricted and it is positioned within the mold 100 by a positioning means or the like.

[0107] The cylindrical portion 22A integrally molded into a substantially truncated cone shape by the multiple elastic portions 11 and the integral annular portion 25 has the same functions and effects as the cylindrical portion 22 of the above-mentioned first embodiment. When the cylindrical portion 22A is placed in the movable-side mold 300 and an insert part 50 is inserted into the cylindrical portion 22A and an external force is applied to the cylindrical portion 22A from the outside, that is, when an external force is applied in the same direction as the axis O direction of the cylindrical portion 22A by clamping the fixed-side mold 200 and the movable-side mold 300, Because the multiple elastic portions 11 forming the tubular portion 22A are elastic, one end side of the multiple elastic portions 11, which are separated from each other, elastically deforms toward the radial inside of the tubular portion 22A (in the radial reduction direction), and adjacent elastic portions 11 approach and come into contact with each other to form annular portions 21, and the multiple elastic portions 11 at the annular portion 21 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular portion 22A, and elastically maintain the insert part 50 in the radial direction for the entire circumferential direction.

[0108] That is, also in the first modified example, the shaft portion 31 is passed through the tubular portion 22A mounted in the movable side mold 300, the insert part 50 is externally fitted onto the shaft portion 31, and the insert part 50 is inserted into the smaller diameter tube on the opposite side to the integral annular portion 25 of the tubular portion 22A. At this time, as in the above-described first embodiment, in the initial state in which the cylindrical portion 22A having the multiple elastic portions 11 is mounted in the movable-side mold 300, the minimum diameter (inner diameter) r1 (see FIG. 4(b)) of the discontinuous annular shape on the smaller diameter side opposite the integral annular portion 25 of the cylindrical portion 22A is set to be maximum, and the maximum dimensional tolerance R of the maximum outer diameter R (see FIG. 4(b)) of the cross-sectional circle on the axial one end side on the insertion side of the insert part 50 into the cylindrical portion 22A is set to be maximum. max The diameter is set slightly larger than (r1>R max). That is, even in the first modification, even if the insert part 50 is inserted into the cylinder on the small-diameter end side of the cylindrical part 22A, before an external force is applied from both directions in the axial line O direction of the cylindrical part 22A by clamping the mold 100 or the like, the cylindrical part 22A does not undergo elastic deformation, the annular minimum diameter (inner diameter) r1 of the small-diameter end of the cylindrical part 22A remains maximum, the interval between the adjacent elastic parts 11 on the small-diameter end side of the cylindrical part 22A does not change, and a small gap is formed between the adjacent elastic parts 11. Therefore, it is easy to insert the axial end side of the insert part 50 into the cylinder on the small-diameter end side of the cylindrical part 22A from the small-diameter end side of the cylindrical part 22A toward the integral annular part 25 on the opposite side.

[0109] Then, when the movable mold 300 and the fixed mold 200 are clamped with the insert part 50 inserted into the tube on the smaller diameter side opposite the integral annular portion 25 of the tubular portion 22A, an external force is applied to the tubular portion 22A from the outside in the same direction as the axial direction of the tubular portion 22A, causing one end side of each elastic portion 11 on the side opposite the integral annular portion 25 of the tubular portion 22A to bend and elastically deform in the diameter reduction direction of the tubular portion 22A, and at the one end side opposite the integral annular portion 25 of the tubular portion 22A, the adjacent elastic portions 11 become close to each other and come into contact with each other to form an annular portion 21 that is approximately continuous in the circumferential direction, and the multiple elastic portions 11 in the annular portion 21 elastically contact the outer peripheral surface of the insert part 50 inserted into the tube on the smaller diameter side opposite the integral annular portion 25 of the tubular portion 22A, elastically holding the entire circumferential direction in the radial direction.

[0110] In other words, the tubular portion 22A also has a plurality of elastic portions 11 that are thin and curved at one end side and have a leaf spring shape, and the distance between adjacent elastic portions 11 gradually increases from one end side toward the integral annular portion 25 at the other end side. Due to the external force in the mold clamping direction generated by mold clamping, the thin and curved one end side of each elastic portion 11 bends, bringing the distance between adjacent elastic portions 11 closer and elastically deforming in the diameter-reducing direction of the tubular portion 22A, so that adjacent elastic portions 11 come close to or abut against each other to form an annular portion 21 that is approximately continuous in the circumferential direction, and the multiple elastic portions 11 in the annular portion 21 elastically hold the insert part 50 in the radial direction throughout the entire circumferential direction.

[0111] Thus, similarly to the above-mentioned embodiment 1, the tubular portion 22A of the modified example 1 also surrounds the outer periphery of the insert part 50 and elastically holds the insert part 50 in a radial direction from its entire circumferential direction by elastically deforming the thin, curved end side of the multiple elastic portions 11 in the radial direction, so that even if there is variation in the dimensions and shape of the insert part 50, the variation is absorbed and gaps are unlikely to occur between the entire circumferential direction of the insert part 50 and the mold 100 side, and since excessive load is not applied in a certain direction, deformation of the insert part 50 can also be suppressed.

[0112] In this way, the insert molding mold part 10 of the first modified example is formed of a plurality of elastic parts 11 formed in the circumferential direction by widening the spacing between adjacent elastic parts 11 from one end side to the other end side, and an integral annular part 25 which integrates the other end sides of the elastic parts 11, and is provided with a tapered tubular part 22A which widens in diameter from one end side to the other end side. When an external force is applied to the tubular part 22A from the outside, for example, an external force in the mold closing direction due to mold closing, the plurality of elastic parts 11 elastically deform in the radial direction at one end side of the tubular part 22A, whereby the plurality of elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular part 22A at the annular part 21 where adjacent elastic parts 11 are close to or abutting each other, and the insert part 50 is elastically held in the radial direction over its entire circumferential direction.

[0113] That is, the insert molding mold part 10 relating to the above-mentioned modified example 1 is also formed of a plurality of elastic parts 11 arranged circumferentially within the mold 100 with the spacing between adjacent parts increasing from one end side to the other end side, and is provided with a tapered tubular part 22A which increases in diameter from one end side to the other end side, and the tubular part 22 has an annular part 21 where the plurality of elastic parts 11 elastically deform radially at its one end side and adjacent elastic parts 11 are close to or abut against each other, whereby the plurality of elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular part 22A, thereby elastically holding the insert part 50 in the radial direction over its entire circumferential direction.

[0114] The insert molding die 100 according to the first modification is an insert molding die 100 having a fixed side die 200 and a movable side die 300, and forming a cavity 400 between the fixed side die 200 and the movable side die 300 by clamping the die. The insert molding die 100 is formed by a plurality of elastic parts 11 formed in the circumferential direction with the spacing between adjacent elastic parts 11 expanded from one end side toward the other end side, and an integral annular part 25 formed by integrating the other end sides of the elastic parts 11. The insert molding die 100 according to the first modification is disposed in the fixed side die 200 or the movable side die 300, and is formed by a plurality of elastic parts 11 formed in the circumferential direction with the spacing between adjacent elastic parts 11 expanded from one end side toward the other end side. When an external force is applied to the tubular portion 22A from the outside, for example, an external force in the clamping direction due to mold clamping, the multiple elastic portions 11 at one end side of the tubular portion 22A elastically deform in the radial direction, whereby adjacent elastic portions 11 are close to or abut against each other at annular portion 21, causing the multiple elastic portions 11 to elastically contact the outer peripheral surface of the insert part 50 inserted into the tubular portion 22A, and the insert part 50 is elastically held in the radial direction over its entire circumferential direction.

[0115] Furthermore, the manufacturing method of the insert resin molded product 700 according to the first modification includes a step of mounting a die part for insert molding in which a tapered cylindrical part 22A, which is formed of a plurality of elastic parts 11 formed in the circumferential direction with the spacing between adjacent parts increased from one end side toward the other end side and an integral annular part 25 formed by integrating the other end sides of the elastic parts 11 and which expands in diameter from one end side toward the other end side, is placed in the fixed die 200 or the movable die 300; and a step of applying an external force from the outside to the cylindrical part 22A into which the insert part 50 has been inserted, whereby the plurality of elastic parts 11 are bent at one end side of the cylindrical part 22A. The method includes an insert part holding process in which the insert part 50 is elastically held in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part 50 inserted into the tubular part 22A with an annular part 21 that is approximately continuous in the circumferential direction and is formed by elastically deforming in the diameter reduction direction and bringing adjacent elastic parts 11 close to or abutting each other, and a molding process in which resin 60 is injected into a cavity 400 in which the insert part 50 is disposed, which is formed between the fixed side mold 200 and the movable side mold 300 in a clamped state, and the insert part 50 and the resin 60 are molded integrally to form an insert resin molded product 700.

[0116] In addition, the insert molding method according to the first modification includes disposing a tapered cylindrical portion 22A, which is formed by a plurality of elastic portions 11 formed in the circumferential direction with the spacing between adjacent elastic portions 11 expanding from one end side toward the other end side and an integral annular portion 25 formed by integrating the other end sides of the elastic portions 11, in a fixed-side mold 200 or a movable-side mold 300 and expanding in diameter from one end side toward the other end side, and applying an external force from the outside to the cylindrical portion 22A into which the insert part 50 is inserted, thereby forming a plurality of elastic portions 11 at one end side of the cylindrical portion 22A. The elastic portions 11 elastically deform in the diameter reduction direction, and adjacent elastic portions 11 come into close proximity or abutment with each other at the annular portion 21, thereby elastically contacting the outer peripheral surface of the insert part 50 inserted into the tubular portion 22A, thereby elastically holding the insert part 50 in the radial direction over its entire circumferential direction, and in this state, resin 60 is injected toward a cavity 400 formed between the clamped fixed side mold 200 and movable side mold 300, in which the insert part 50 is positioned, and the insert part 50 and the resin 60 are molded integrally.

[0117] In this variant 1, a tapered tubular portion 22A is arranged in a mold 100, the tapered tubular portion 22A consisting of a plurality of elastic portions 11 formed in the circumferential direction with the spacing between adjacent elastic portions 11 widening from one end side to the other end side and an integral annular portion 25 formed by integrating the other end sides of the elastic portions 11. The tapered tubular portion 22A widens in diameter from one end side to the other end side. Then, when an insert part 50 is inserted into the tube at one end side opposite the integral annular part 25 side of the tubular part 22A, and an external force is applied to the tubular part 22A from the outside, that is, when an external force is applied to the tubular part 22A from the outside in the same direction as its axial direction by mold clamping or the like, the spacing between adjacent elastic parts 11 changes due to elastic deformation of the multiple elastic parts 11 at the small-diameter one end side of the tubular part 22A, and the tubular part 22A reduces in diameter, causing adjacent elastic parts 11 to approach or come into contact with each other, thereby forming an annular part 21 that is approximately continuous in the circumferential direction, and the multiple elastic parts 11 in the annular part 21 elastically contact the outer peripheral surface of the insert part 50 inserted into the tube at one end side opposite the integral annular part 25 side of the tubular part 22A, and the insert part 50 is elastically held in the radial direction over its entire circumferential direction.

[0118] As a result, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22A causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact in the radial direction with respect to the entire outer circumferential direction of the insert part 50, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 forming the annular part 21 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Therefore, also in the first modification, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0119] In the above-mentioned embodiment 1 and modification 1, the one end side of the cylindrical parts 22, 22A is elastically deformed in the diameter-reducing direction by the external force caused by clamping the fixed side mold 200 and the movable side mold 300, and the insert part 50 is elastically held in the radial direction over its entire circumferential direction. However, in the case of implementing the present invention, the means for applying the external force to the cylindrical parts 22, 22A is not limited to the above, as long as the one end side of the cylindrical part 22 is elastically deformed in the diameter-reducing direction by applying an external force to the cylindrical parts 22, 22A from the outside, and the insert part 50 is elastically held in the radial direction over its entire circumferential direction. For example, the one end side of the cylindrical part 22 may be elastically deformed in the diameter-reducing direction by applying an external force to the cylindrical parts 22, 22A from the outside by a hydraulic cylinder, a spring movement, a driving means, or the like, and the insert part 50 may be elastically held in the radial direction over its entire circumferential direction.

[0120] [Embodiment 2] Second Embodiment Next, an insert molding die 100 according to a second embodiment of the present invention will be described with reference to FIG. In the above-described Embodiment 1, in the insert molding die 100, an external force applied in the same direction as the axial direction of the cylindrical portion 22 by clamping the movable die 300 and the fixed die 200, that is, an external force applied from both sides in the axial direction of the cylindrical portion 22 causes each elastic portion 11 to bend and deform in the diameter-reducing direction at the smaller-diameter end portion side where the insert component 50 is inserted in the cylindrical portion 22, so that adjacent elastic portions 11 approach or contact each other to form an annular portion 21 that is substantially continuous in the circumferential direction. At the annular portion 21, a plurality of elastic portions 11 elastically hold the entire periphery of the insert component 50 in the radial direction.

[0121] In contrast, in the second embodiment, as shown in Fig. 11(a), a shaft portion 31 is passed through the inside of the cylindrical portion 22 formed by a plurality of elastic portions 11. As shown in Fig. 11(b), the large-diameter shaft portion 31b of the shaft portion 31 is brought into contact with the annular inner surface on the smaller-diameter end portion side of the cylindrical portion 22, and the annular side on the smaller-diameter end portion side of the cylindrical portion 22 is expanded radially inward to outward by the large-diameter shaft portion 31b of the shaft portion 31. That is, since the diameter r2 of the large-diameter shaft portion 31b of the shaft portion 31 is set larger than the minimum diameter (inner diameter) r1 of the annular shape on the smaller-diameter end portion side of the cylindrical portion 22 (r1 < r2), as shown in Fig. 11(a), the shaft portion 31 is inserted into the inside of the cylindrical portion 22 from the larger-diameter other end portion side of the cylindrical portion 22 toward the smaller-diameter end portion side. As shown in Fig. 11(b), by pushing the large-diameter shaft portion 31b of the shaft portion 31 into the annular shape on the smaller-diameter end portion side of the cylindrical portion 22 in the direction of one side of the axis O of the cylindrical portion 22, each elastic portion 11 elastically deforms and the annular side on the smaller-diameter end portion side of the cylindrical portion 22 expands in diameter.

[0122] 11(c), in a state in which the annular inner diameter of the small diameter one end side of the cylindrical portion 22 is expanded by contact with the large diameter shaft portion 31b of the shaft portion 31 and expanded by the elastic deformation of each elastic portion 11, the insert part 50 is fitted onto the small diameter shaft portion 31a which is the axial one end side of the shaft portion 31 and positioned. Thereafter, as shown in FIG. 11(d), by drawing the shaft portion 31 toward the other side of the axis O direction of the cylindrical portion 22, that is, by moving the shaft portion 31 in a direction in which the insert part 50 is inserted into the annular side of the small diameter one end side of the cylindrical portion 22, the axial one end side of the insert part 50 is inserted into the annular side of the small diameter one end side of the cylindrical portion 22.

[0123] At this time, in the initial state in which the multiple elastic portions 11 are arranged in the circumferential direction in the mold 100 to form the cylindrical portion 11, the annular minimum diameter (inner diameter) r1 on the small-diameter one end side of the cylindrical portion 22 is the minimum value R of the dimensional tolerance of the outermost diameter R of the insert part 50. min Even if it is set as follows (r1≦R min ), the diameter r2 of the large diameter shaft portion 31b of the shaft portion 31 is the maximum value R of the dimensional tolerance of the outermost diameter R of the insert part 50. max By setting it larger than (r2>R max ), when one end side of the insert part 50 in the axial direction is inserted into the annular side of the small diameter end side of the cylindrical part 22, the annular side of the small diameter end side of the cylindrical part 22, which has been expanded by the large diameter shaft part 31b of the shaft part 31, is deformed in the direction of reducing the diameter, but the minimum diameter (inner diameter) r1 of the annular side of the small diameter end side of the cylindrical part 22 in the initial state is smaller than the minimum value R of the dimensional tolerance of the outermost diameter R of the insert part 50. min It is set as follows (r1≦R min ), when the insert part 50 is inserted, the annular side of the smaller diameter end of the tubular portion 22 is in an expanded diameter state or initial state with adjacent elastic portions 11 in close proximity to or in contact with each other in the annular portion 21, and the multiple elastic portions 11 forming the annular portion 21 elastically contact the outer peripheral surface of the insert part 50, elastically maintaining the entire circumferential direction in the radial direction.

[0124] That is, in the first embodiment described above, the insert part 50 is inserted by external forces from both directions in the same axial direction of the cylindrical part 22 applied to the cylindrical part 22 by mold clamping or the like of the mold 100. A plurality of elastic parts 11 are bent and reduced in diameter on the smaller-diameter end side of the cylindrical part 22, so that the adjacent elastic parts 11 approach and contact each other to form an annular part 21. In the annular part 21, the plurality of elastic parts 11 elastically hold the insert part 50 in the radial direction over the entire circumference thereof.

[0125] In contrast, in the second embodiment, a large-diameter shaft part 31b (r1 < r2) of a shaft part 31 set to be larger in diameter than the minimum diameter (inner diameter) r1 is pushed into one direction side in the same direction in the axial direction of the cylindrical part 22 toward the annular side on the smaller-diameter end side of the cylindrical part 22, and a plurality of elastic parts 11 are elastically deformed in the diameter-expanding direction from the inner side (inside the cylinder) to the outside by an external force from the inner side. With the annular side on the smaller-diameter end side of the cylindrical part 22 expanded in diameter, the shaft part 31 with the insert part 50 mounted is pulled toward the other direction side in the same direction in the axial direction of the cylindrical part 22, so that the insert part 50 is inserted into the annular side on the smaller-diameter end side of the cylindrical part 22. At this time, although the annular side on the smaller-diameter end side of the cylindrical part 22 that has been expanded by the large-diameter shaft part 31b of the shaft part 31 is elastically deformed in the diameter-reducing direction, the minimum diameter (inner diameter) r1 of the annular shape on the smaller-diameter end side of the cylindrical part 22 in the initial state is the minimum value R of the dimensional tolerance of the outermost diameter R of the insert part 50 min is set to be less than or equal to the following (r1 ≦ R min ). Thus, the annular side on the smaller-diameter end side of the cylindrical part 22 is in an expanded-diameter state or an initial state, and the insert part 50 is inserted into the inside of the cylinder on the annular side on the smaller-diameter end side of the cylindrical part 22. A plurality of elastic parts 11 are bent by an external force from the inner side (inside the cylinder), and the adjacent elastic parts 11 approach and contact each other to form an annular part 21 that is substantially continuous in the circumferential direction. At the annular part 21, the plurality of elastic parts 11 elastically contact the outer peripheral surface of the insert part 50 and elastically hold the insert part 50 in the radial direction over the entire circumference thereof.

[0126] In this manner, in the above-described first embodiment, with the insert part 50 inserted into the annular portion on the small-diameter end side of the cylindrical part 22, the external force applied from the outside of the cylindrical part 22 on both axial sides thereof by clamping the mold 100 or the like bends the multiple elastic parts 11 that form the cylindrical part 22, thereby reducing the diameter of the annular side on the small-diameter end side of the cylindrical part 22 from the outside to the inside in the radial direction, and causing the multiple elastic parts 11 to elastically contact the insert part 50. In contrast, in the present embodiment, In the case of 2, when the shaft portion 31 and the insert part 50 attached thereto are inserted into the tube at the smaller diameter end side of the tubular portion 22, an external force is applied to the tubular portion 22 from the inside (inside the tube) due to an external force on one side in the direction of the axis O of the tubular portion 22, which deflects the multiple elastic parts 11 that form the tubular portion 22, and the annular side at the smaller diameter end side of the tubular portion 22 expands radially from the inside to the outside, causing the multiple elastic parts 11 to elastically contact the insert part 50. However, since the other configurations are similar to those of the first embodiment, a detailed description thereof will be omitted here, and only the differences will be described.

[0127] In this embodiment 2, too, the shaft portion 31 is passed through the tubular portion 22 formed by the multiple elastic portions 11, but in this embodiment 2, the diameter r2 of the large diameter shaft portion 31b of the shaft portion 31 is set to be larger than the annular diameter r1 of the small diameter one end side of the tubular portion 22 in the initial state formed by the multiple elastic portions 11 (r2>r1). In this embodiment 2, as shown in Figures 11(a) and 11(b), the shaft portion 31 is inserted into the tubular portion 22 from its larger diameter other end side toward its smaller diameter one end side. When the large diameter shaft portion 31b of the shaft portion 31 is pushed into the tube at the smaller diameter one end side of the tubular portion 22, the large diameter shaft portion 31b of the shaft portion 31 comes into contact with the multiple elastic portions 11 from the inner surface on the annular side of the smaller diameter one end side of the tubular portion 22 due to an external force, whereby the multiple elastic portions 11 forming the tubular portion 22 are elastically deformed, the distance between adjacent elastic portions 11 increases, and the annular side at the smaller diameter one end side of the tubular portion 22 expands in diameter.

[0128] Then, with the annular side of the small diameter end of the tubular portion 22 expanded in diameter by the large diameter shaft portion 31b of the shaft portion 31, the insert part 50 is fitted around the small diameter shaft portion 31a of the shaft portion 31, as shown in Figure 11 (c), and the insert part 50 is passed through the shaft portion 31 until the axial end face of the insert part 50 abuts the step surface 32 between the small diameter shaft portion 31a and the large diameter shaft portion 31b, thereby positioning the insert part 50 just before the small diameter end of the tubular portion 22. That is, in this embodiment 2, the shaft portion 31 is passed through the tubular portion 22 so that the step surface 32 between the small diameter shaft portion 31a and the large diameter shaft portion 31b of the shaft portion 31 is located within the annular space of the small diameter end of the tubular portion 22 or in front of the small diameter end of the tubular portion 22, and the insert part 50 is passed through the shaft portion 31 up to a position where it abuts against the step surface 32 of the shaft portion 31, thereby being positioned in front of the small diameter end side of the tubular portion 22.

[0129] Next, with the insert part 50 positioned just before the annular part on the small diameter side of the cylindrical part 22, as shown in FIG. 11(d), the shaft part 31 is moved toward the other side in the direction of the axis O of the cylindrical part 22, and the insert part 50 attached to the small diameter shaft part 31a, which is the one axial end side of the shaft part 31, is inserted into the cylinder on the small diameter end side of the cylindrical part 22. In the initial state (FIG. 11(a)) in which the multiple elastic parts 11 are arranged in the circumferential direction within the mold 100 to form the cylindrical part 22, the minimum diameter (inner diameter) r1 of the annular part on the small diameter end side of the cylindrical part 22 becomes equal to or smaller than the minimum value R of the dimensional tolerance of the outermost diameter R of the insert part 50. min Even if it is set as follows (r1≦R min ), the diameter r2 of the large diameter shaft portion 31b of the shaft portion 31 is the maximum value R of the dimensional tolerance of the outermost diameter R of the insert part 50. max By setting it larger than (r2>R max >R min≧r1), the annular side of the smaller diameter end of the tubular portion 22 elastically deforms in the diameter reducing direction, but due to the insertion of the insert part 50, the annular side of the smaller diameter end of the tubular portion 22 is in an expanded diameter state or in its initial state, and the multiple elastic portions 11 on the annular side of the smaller diameter end of the tubular portion 22 bend so that adjacent elastic portions 11 in the circumferential direction are close to or abut each other in the annular portion 21, where the multiple elastic portions 11 elastically contact the outer peripheral surface of the insert part 50 inserted on the annular side of the smaller diameter end of the tubular portion 22, and the insert part 50 is elastically held in the radial direction around its entire periphery.

[0130] That is, in the second embodiment, in the initial state, the minimum diameter (inner diameter) r1 of the small diameter annular portion of the cylindrical portion 22 is minimum, and when the large diameter shaft portion 31b of the shaft portion 31 is inserted into the small diameter annular side of the cylindrical portion 22, the diameter is expanded to a maximum, and when the insert part 50 is inserted, the minimum diameter (inner diameter) r1 of the small diameter annular portion of the cylindrical portion 22 in the initial state is equal to the minimum value R of the dimensional tolerance of the maximum outer diameter R of one end of the insert part 50 in the length direction. min By setting it as follows (r1≦R min ), the cylindrical portion 22 is in an expanded state of diameter equal to or larger than the small annular minimum diameter (inner diameter) r1 in the initial state, and adjacent elastic portions 11 at the small-diameter end side of the cylindrical portion 22 are brought into close proximity or abutment with each other due to elastic deformation of the multiple elastic portions 11, so that the annular portion 21 elastically contacts the outer peripheral surface of the insert part 50, thereby elastically holding the insert part 50 in the radial direction over its entire periphery. Note that, here, the minimum value R of the dimensional tolerance of the maximum outer diameter R of the insert part 50 is min The elastic portions 11 are designed to abut against each other when the minimum value R min In larger ones, adjacent elastic portions 11 are close to each other with a clearance (for example, 0.1 mm or less, preferably 0.08 mm or less, more preferably 0.05 mm or less) that does not allow resin to leak between adjacent elastic portions 11.

[0131] In the second embodiment, the minimum diameter (inner diameter) r1 of the small annular shape of the cylindrical portion 22 in the initial state is equal to the minimum value R of the dimensional tolerance of the maximum outer diameter R of one end portion in the length direction of the insert part 50. min The following diameters are set (r1≦R min) is also set such that the diameter r2 of the large diameter shaft portion 31b of the shaft portion 31 is set to be larger than the annular diameter r1 of the small diameter one end side of the cylindrical portion 22 in the initial state formed by the multiple elastic portions 11 (r2>r1), and the maximum value R of the dimensional tolerance of the outermost diameter R of the insert part 50 is max Because it is set larger than r2 (r max >R min ≧r1), when the small diameter annular side of the tubular portion 22 is expanded by the insertion of the large diameter shaft portion 31b of the shaft portion 31, the insert part 50 abuts against the step surface 32 between the small diameter shaft portion 31a and the large diameter shaft portion 31b of the shaft portion 31 by the axial movement of the shaft portion 31, and is inserted into the small diameter annular side of the tubular portion 22, so that the insert part 50 can be easily inserted into the small diameter annular side of the tubular portion 22.

[0132] In the second embodiment, in the initial state in which the insert molding die part 10 is mounted in the die 100 so that the multiple elastic parts 11 are arranged in the circumferential direction, that is, in a cylindrical (annular) shape in the die 100 to form the cylindrical part 22, the multiple elastic parts 11 forming the cylindrical part 22 may be arranged (close to each other) with a slight gap between adjacent elastic parts 11 at the tip of the thin one end side, or may be abutted. In any case, when the insert part 50 is inserted into the cylinder at the small-diameter one end side of the cylindrical part 22, the adjacent elastic parts 11 are close to each other or abutted to each other at the small-diameter one end side of the cylindrical part 22 to form a substantially continuous annular part 21 in the circumferential direction, and the multiple elastic parts 11 may elastically hold the insert part 50 in the entire circumferential direction at the annular part 21.

[0133] In addition, in the above-mentioned embodiment 1, in the initial state in which the insert molding mold part 10 is mounted in the mold 100 so that the multiple elastic parts 11 are arranged circumferentially, i.e., in a cylindrical (annular) shape, within the mold 100 to form the tubular part 22, the multiple elastic parts 11 forming the tubular part 22 are arranged at the tips of their thin one end sides with a slight gap between adjacent elastic parts 11, and the minimum diameter r1 of the smaller diameter annular side of the tubular part 22 is set to a maximum. Then, when the insert part 50 is inserted into the small-diameter annular side of the tubular part 22, and an external force is applied from both sides in the same direction as the axial direction of the tubular part 22 to the tubular part 22 from the outside by clamping the mold 100, etc., the elastic part 11 on the annular side of the small-diameter one end side of the tubular part 22 into which the insert part 50 is inserted bends and elastically deforms in the diameter reduction direction, and adjacent elastic parts 11 are close to or in contact with each other in the circumferentially approximately continuous annular part 21, so that the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction from its entire periphery.

[0134] In contrast, in this embodiment 2, in the initial state in which the insert molding mold part 10 is mounted in the mold 100 so that multiple elastic portions 11 are arranged circumferentially, i.e., in a cylindrical (annular) shape, within the mold 100 to form the tubular portion 22, the multiple elastic portions 11 forming the tubular portion 22 are arranged at their thin end sides with a slight gap between adjacent elastic portions 11 (close to each other) or in contact with each other, but the minimum diameter r1 of the smaller diameter annular side of the tubular portion 22 is set to a minimum. When the large diameter shaft portion 31b of the shaft portion 31 is inserted into the small diameter annular side of the tubular portion 22, the minimum diameter r1 becomes maximum, and when the insert part 50 attached to the shaft portion 31 is pulled into the small diameter annular side of the tubular portion 22, the diameter of the small diameter annular side of the tubular portion 22 decreases, but is still in an expanded state that is equal to or greater than the small diameter annular minimum diameter (inner diameter) r1 of the tubular portion 22 in the initial state, and the elastic deformation of the elastic portions 11 in the expanding direction on the annular side of the small diameter one end side of the tubular portion 22 into which the insert part 50 is inserted brings adjacent elastic portions 11 into close proximity or abutting each other at the annular portion 21, where the multiple elastic portions 11 elastically hold the insert part 50 in a radial direction from its entire periphery.

[0135] Thus, in the second embodiment, in the mold 100, the shaft portion 31 is passed through the cylindrical portion 22 formed by arranging a plurality of elastic portions 11 in the circumferential direction, i.e., in a cylindrical (annular) shape, and the large-diameter shaft portion 31b of the shaft portion 31 is inserted into the inner surface of the small-diameter annular side of the cylindrical portion 22, and the small-diameter annular side of the cylindrical portion 22 is expanded in diameter by contacting the outer periphery of the large-diameter shaft portion 31b. In this state, the insert part 50 is passed through the shaft portion 31 until one end face in the axial direction of the insert part 50 abuts against the step surface 32 of the shaft portion 31, and is positioned. Then, in a state in which the large-diameter shaft portion 31b of the shaft portion 31 is in contact with the inner surface of the small-diameter annular side of the cylindrical portion 22, the shaft portion 31 is pulled to the other side of the axis O direction of the cylindrical portion 22, so that the maximum value R of the dimensional tolerance of the maximum outer diameter R is smaller than the diameter r2 of the large-diameter shaft portion 31b of the shaft portion 31. max When the insert part 50, which has a slightly smaller diameter, is inserted into the small-diameter annular side of the cylindrical part 22, the annular part on the small-diameter one end side of the cylindrical part 22 is reduced in diameter. However, the minimum diameter (inner diameter) r1 of the small-diameter annular part of the cylindrical part 22 in the initial state is smaller than the minimum value R of the dimensional tolerance of the maximum outer diameter R of the insert part 50 at one end in the length direction. min The following diameters are set (r1≦R min ) At the annular side of the small-diameter end of the tubular portion 22 into which the insert part 50 is inserted, the elastic deformation of the elastic parts 11 in the radial expansion direction causes adjacent elastic parts 11 to come close to or abut against each other at the annular part 21, which elastically contacts the outer peripheral surface of the insert part 50, and the insert part 50 is elastically held in the radial direction from its entire periphery.

[0136] Then, with the insert part 50 attached and elastically held by the multiple elastic parts 11 that form the tubular portion 22 within the mold 100, the fixed side mold 200 and the movable side mold 300 are clamped as shown in Figure 11 (e), and resin 60 is injected from the nozzle N of the injection machine set on the fixed side mounting plate 211 side of the fixed side mold 200, filling the cavity 400 through flow paths such as the sprue, runner, gate, etc. formed in the fixed side mold 200, and the resin 60 also flows around the insert part 50 exposed in the cavity 400 and solidifies, forming an insert resin molded product 700 in which the insert part 50 and resin 60 are integrated.

[0137] In the above-described second embodiment, before the large-diameter shaft portion 31b of the shaft portion 31 is inserted into the small-diameter side of the cylindrical portion 22, the minimum diameter r1 of the small-diameter annular side of the cylindrical portion 22 is smaller than the minimum value R of the dimensional tolerance of the outermost diameter R of one end of the insert part 50 on the axial insertion side. min The diameter r2 of the large-diameter shaft portion 31b of the shaft portion 31 is set to be smaller than the maximum dimensional tolerance of the outermost diameter R of the insert part 50. max Because it is set larger than (r2>R max >R min ≧r1), in a state in which the large diameter shaft portion 31b of the shaft portion 31 is inserted into the small diameter side of the cylindrical portion 22 and in contact with the inner surface, the small diameter annular side of the cylindrical portion 22 is expanded in diameter, and the insert part 50, which is attached concentrically with the shaft portion 31 by abutting against the step surface 32 of the shaft portion 31, can be easily inserted into the small diameter annular side of the cylindrical portion 22. Then, when the insert part 50 is inserted into the small diameter annular side of the cylindrical portion 22 by the movement of the shaft portion 31 in a state in which the small diameter annular side of the cylindrical portion 22 is expanded in diameter by the large diameter shaft portion 31b of the shaft portion 31, the small diameter annular side of the cylindrical portion 22 is reduced in diameter, but the minimum diameter r1 of the small diameter annular side of the cylindrical portion 22 is smaller than the minimum value R of the dimensional tolerance of the outermost diameter R of one end of the axial insertion side of the insert part 50. min By setting it as follows, the smaller diameter annular side of the tubular portion 22 is in an expanded diameter state or initial state, and adjacent elastic portions 11 on the annular side of the smaller diameter one end side of the tubular portion 22 are brought close to or into contact with each other due to elastic deformation of the elastic portions 11 in the expanding diameter direction, and the multiple elastic portions 11 elastically contact the outer peripheral surface of the insert part 50, and elastically hold the insert part 50 in the radial direction from its entire periphery.

[0138] Therefore, even in the above-mentioned embodiment 2, the elasticity of the elastic portion 11 on the small-diameter annular side of the tubular portion 22 arranged around the entire circumferential direction of the insert part 50 is maintained in the radial direction from the entire circumferential direction of the insert part 50, so that even if there is variation in the dimensions and shape of the insert part 50, the variation is absorbed and gaps are unlikely to occur between the entire circumferential direction of the insert part 50 and the mold 100 side, and since excessive load is not applied in a certain direction, deformation of the insert part 50 can also be suppressed.

[0139] That is, the elastic deformation of the multiple elastic parts 11 arranged in the entire circumferential direction of the insert part 50 causes the multiple elastic parts 11 to elastically contact the entire circumferential direction of the insert part 50 in the radial direction and to adhere closely to the entire circumferential direction of the insert part 50, so even if there is variation in the size and shape of the insert part 50, the variation is absorbed and no gap is generated between the entire circumferential direction of the insert part 50 and the movable side mold plate 312 (inserted part 312A) side. In addition, since no excessive load is applied in a certain direction, deformation of the insert part 50 can be suppressed. Furthermore, since the multiple elastic parts 11 elastically contact and hold the insert part 50 in the radial direction from the outer circumferential surface thereof due to the elastic deformation of the multiple elastic parts 11, even if there is a misalignment or malfunction in the mold clamping of the mold 100, deformation of the insert part 50 is unlikely to occur. According to the insert molding mold part 10 of the above-mentioned embodiment 2, the multiple elastic parts 11 which are arranged circumferentially within the mold 100 to form the tubular part 22 have their small diameter annular side expanded in diameter by an external force applied from the inside (inside the tube) of the tubular part 22 when the large diameter shaft part 31b of the shaft part 31 or the insert part 50 is inserted into the tube of the tubular part 22, making it easy to insert the insert part 50 therein.

[0140] As explained above, the insert molding mold part 10 of the above-mentioned embodiment 2 is also formed of a plurality of elastic parts 11 arranged circumferentially within the mold 100 with the spacing between adjacent parts increasing from one end side to the other end side, and is provided with a tapered tubular part 22 that increases in diameter from one end side to the other end side, and the tubular part 22 elastically contacts the outer peripheral surface of the insert part 50 inserted into the tubular part 22 at an annular part 21 where the plurality of elastic parts 11 elastically deform radially at one end side and adjacent elastic parts 11 are close to or abut against each other, thereby elastically holding the insert part 50 in the radial direction over its entire circumferential direction.

[0141] According to the insert molding mold part 10 of the above-mentioned embodiment 2, the tapered tubular part 22 is formed of a plurality of elastic parts 11 arranged circumferentially within the mold 100 with the spacing between adjacent parts increasing from one end side to the other end side, and when an external force is applied to the tubular part 22 from the inside by inserting the insert part 50 attached to the shaft part 31 into the tubular part 22, the one end sides of the plurality of elastic parts 11 elastically deform in the expanding direction radially outward of the tubular part 22, causing adjacent elastic parts 11 to approach or come into contact with each other, forming an annular part 21 which is elastically held in contact with the entire circumferential direction of the insert part 50 in the radial direction.

[0142] In the above-mentioned embodiment 2, the multiple elastic portions 11 are arranged circumferentially within the mold 100 with the spacing between them increasing from one end side to the other end side to form the tubular portion 22, and when an external force is applied to the tubular portion 22 from the inside, that is, when the large-diameter shaft portion 31b of the shaft portion 31 is inserted into the annular space on the small-diameter one end side of the tubular portion 22 formed by the multiple elastic portions 11, the insert part 50 is inserted in a state in which the small-diameter one end side of the tubular portion 22 is expanded in diameter, and although the small-diameter one end side of the tubular portion 22 reduces in diameter, the multiple elastic portions 11 elastically deform in the expanding diameter direction at the small-diameter one end side of the tubular portion 22 compared to the initial state, and adjacent elastic portions 11 are close to or abutting each other at the annular portion 21, which elastically holds the insert part 50 in a radial direction relative to the entire circumferential direction.

[0143] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, also in the insert molding die component 10 of the second embodiment, deformation of the insert component 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0144] In particular, in the above-mentioned embodiment 2, the large diameter shaft portion 31b of the shaft portion 31 is inserted into the annular space on the small diameter end side of the tubular portion 22 formed by a plurality of elastic portions 11, thereby expanding the diameter of the small diameter end side of the tubular portion 22 and inserting the insert part 50 therein, thereby making it easy to insert the insert part 50 into the small diameter annular side of the tubular portion 22. That is, according to the insert molding die part 10 of the second embodiment, the multiple elastic parts 11 are arranged in the die 100 with the mutual spacing between adjacent elastic parts 11 expanded from one end side to the other end side, and the large-diameter shaft part 31b of the shaft part 31 is inserted into the small-diameter one end side of the cylindrical part 22 formed by the elastic deformation of the multiple elastic parts 11 in the diameter expanding direction by an external force applied from the inside of the cylindrical part 22, and the insert part 50 is inserted therein, and although the multiple elastic parts 11 are reduced in diameter by the insertion of the insert part 50, the multiple elastic parts 11 are elastically deformed in the diameter expanding direction at the small-diameter one end side of the cylindrical part 22 compared to the initial state, and the adjacent elastic parts 11 are close to or abutting each other at the annular part 21, which elastically holds the multiple elastic parts 11 in the radial direction relative to the entire circumferential direction of the insert part 50. Therefore, the insert part 50 can be easily inserted into the small-diameter cylindrical inner side of the cylindrical part 22.

[0145] Also in the above-mentioned second embodiment, each elastic part 11 has one end side formed thin and curved leaf spring shape, and one end side of each elastic part 11 in the cylindrical part 22 is easily bent and elastically deformed in the radial expansion direction by an external force applied from inside the cylindrical part 22. That is, when the shaft part 31 and the insert part 50 are inserted into the cylindrical part 22, an external force is applied in the same direction as the axis O direction, and the one end side (tip side) of each elastic part 11 in the cylindrical part 22 is easily bent and elastically deformed, and the adhesion to the insert part 50 can be improved. Therefore, the effect of suppressing the generation of burrs can be further improved.

[0146] Furthermore, in the above-mentioned second embodiment, the shaft portion 31 is provided to pass through the cylindrical portion 22 formed by the multiple elastic portions 11 in the mold 100 and to position the insert part 50 inserted into the small-diameter end side of the cylindrical portion 22. This improves the positioning accuracy of the insert part 50, and even when the resin 60 is injected toward the cavity 400, the insert part 50 is unlikely to shift in position, making it possible to stably hold the elasticity of the insert part 50 by the multiple elastic portions 11, and also to prevent the insert part 50 from being deformed by the injection pressure. That is, the shaft portion 31 is disposed on the axis O of the cylindrical portion 22 in the mold 100 and passed through the through hole 51 formed in the insert part 50, which guides the insert part 50 into the small-diameter side of the cylindrical portion 22, thereby improving the positioning accuracy of the insert part 50. This prevents the insert part 50 from being shifted in position and deformed, and further improves the effect of suppressing the generation of burrs. In particular, the shaft portion 31 that is disposed on the axis O of the cylindrical portion 22 inside the mold 100 and passes through the through hole 51 formed in the insert part 50 can be easily manufactured and the parts cost can be kept low. In addition, the shaft portion 31 passes through the cylindrical portion 22 and applies an external force from the inside to elastically deform the cylindrical portion 22 in the radially expanding direction, thereby functioning as a part that facilitates the insertion of the insert part 50.

[0147] The insert molding die 100 of the above-mentioned embodiment 2 has a fixed side die 200 and a movable side die 300, and is an insert molding die 100 that forms a cavity 400 between the fixed side die 200 and the movable side die 300 by clamping, and is formed by a plurality of elastic parts 11 arranged circumferentially within the fixed side die 200 or the movable side die 300, with the spacing between adjacent parts expanding from one end side toward the opposite other end side, and is equipped with a tapered tubular part 22 that expands in diameter from one end side toward the other end side, and the tubular part 22 elastically contacts the outer peripheral surface of the insert part 50 inserted into the tubular part 22 at the annular part 21 where the plurality of elastic parts 11 elastically deform in the radial direction at one end side and adjacent elastic parts 11 are close to or abut against each other, and elastically holds the insert part 50 in the radial direction over its entire circumferential direction.

[0148] According to the insert molding die 100 of the above-mentioned embodiment 2, the tapered tubular portion 22 is formed of a plurality of elastic portions 11 arranged circumferentially within the fixed side die 200 or the movable side die 300 with the spacing between adjacent elastic portions increasing from one end side to the other end side, and when an external force is applied to the tubular portion 22 from the inside by inserting the insert part 50 attached to the shaft portion 31 into the tubular portion 22, one end sides of the plurality of elastic portions 11 elastically deform in the expanding direction toward the radially outward side of the tubular portion 22, so that adjacent elastic portions 11 are close to or abut against each other at the annular portion 21, where the plurality of elastic portions 11 are elastically held in contact with each other in the radial direction relative to the entire circumferential direction of the insert part 50.

[0149] In the above-mentioned embodiment 2, the multiple elastic portions 11 are arranged circumferentially within the mold 100 with the spacing between them expanding from one end side to the other end side to form the tubular portion 22, and when an external force is applied to the tubular portion 22 from the inside, that is, when the large-diameter shaft portion 31b of the shaft portion 31 is inserted into the annular space on the small-diameter one end side of the tubular portion 22 formed by the multiple elastic portions 11, the insert part 50 is inserted in a state in which the small-diameter one end side of the tubular portion 22 is expanded in diameter, the small-diameter one end side of the tubular portion 22 reduces in diameter, but the multiple elastic portions 11 elastically deform in the expanding diameter direction at the small-diameter one end side of the tubular portion 22 compared to the initial state, and the multiple elastic portions 11 are elastically held in contact with the entire circumferential direction of the insert part 50 at the annular portion 21 where adjacent elastic portions 11 are close to or abut against each other.

[0150] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, also in the insert molding die 100 of the second embodiment, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0151] Moreover, the above-mentioned second embodiment includes a step of mounting a tapered cylindrical portion 22, which is formed of a plurality of elastic portions 11 arranged in the circumferential direction with the spacing between adjacent elastic portions 11 increasing from one end side to the other end side, in a fixed mold 200 or a movable mold 300; and a step of applying an external force from the inside to the cylindrical portion 22 into which the insert part 50 has been inserted, whereby the plurality of elastic portions 11 are elastically deformed in the diameter increasing direction at one end side of the cylindrical portion 22, so that adjacent elastic portions 11 approach or abut against each other. This can also be regarded as an invention of a manufacturing method for an insert resin molded product 700, which includes an insert part holding process in which the insert part 50 is elastically held in the radial direction over its entire circumferential direction by elastically contacting the outer peripheral surface of the insert part 50 inserted into the tubular part 22 with the abutting annular part 21, and a molding process in which resin 60 is injected into a cavity 400 formed between the fixed side mold 200 and the movable side mold 300 in a mold clamped state and in which the insert part 50 is disposed, and the insert part 50 and the resin 60 are molded integrally to form the insert resin molded product 700.

[0152] According to the manufacturing method of the insert resin molded product 700 of the second embodiment, in the insert molding mold part mounting step, the multiple elastic parts 11 are arranged in the fixed mold 200 or the movable mold 300 in the circumferential direction while widening the mutual intervals between adjacent elastic parts 11 from one end side toward the other end side to form the cylindrical part 22, and in the insert part holding step, the insert part 50 is inserted into the cylinder on the one end side of the smaller diameter side of the cylindrical part 22 formed by the multiple elastic parts 11, and in this state, when an external force is applied from the inside to the cylindrical part 22, In other words, when the large diameter shaft portion 31b of the shaft portion 31 is inserted into the annular space on the smaller diameter end side of the tubular portion 22 formed by the multiple elastic portions 11, and the insert part 50 is inserted in a state in which the smaller diameter end side of the tubular portion 22 is expanded in diameter, the smaller diameter end side of the tubular portion 22 reduces in diameter, but the multiple elastic portions 11 elastically deform in the expanding direction at the smaller diameter end side of the tubular portion 22 compared to the initial state, and the multiple elastic portions 11 are elastically held in contact with or in contact with each other in the annular portion 21 relative to the entire circumferential direction of the insert part 50 in the radial direction.

[0153] That is, the multiple elastic parts 11 are arranged in the mold 100 with the mutual spacing between adjacent elastic parts 11 expanded from one end side to the other end side to form the cylindrical part 22, and when an external force is applied to the cylindrical part 22, the spacing between adjacent elastic parts 11 changes due to elastic deformation of the multiple elastic parts 11 at the small-diameter one end side of the cylindrical part 22, and the cylindrical part 22 expands in diameter, and the multiple elastic parts 11 elastically contact the outer circumferential surface of the insert part 50 at the annular part 21 where the adjacent elastic parts 11 are close to or in contact with each other, so that the insert part 50 is elastically held in the radial direction over its entire circumferential direction by the annular part 21 formed by the multiple elastic parts 11 being close to or in contact with each other. Then, in this state, in the molding process, the insert part 50 and the resin 60 are molded integrally to form the insert resin molded product 700.

[0154] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, also in the method for manufacturing the insert resin molded product 700 according to the second embodiment, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0155] Furthermore, the above-mentioned embodiment 2 can also be regarded as an invention of an insert molding method in which a plurality of elastic portions 11 are arranged in the fixed side mold 200 or the movable side mold 300 with the spacing between adjacent elastic portions 11 expanding from one end side toward the opposite other end side to form a tapered tubular portion 22 expanding in diameter from one end side toward the other end side, and an external force is applied from the inside to the tubular portion 22 into which the insert part 50 is inserted, whereby the elastic deformation of the plurality of elastic portions 11 in the diameter-reducing direction on one end side of the tubular portion 22 causes adjacent elastic portions 11 to come into elastic contact with the insert part 50 inserted into the tubular portion 22 at the annular portion 21 where they are close to or abut each other, thereby elastically holding the insert part 50 in the radial direction over its entire circumferential direction, and in this state, a resin 60 is injected toward a cavity 400 formed between the clamped fixed side mold 200 and the movable side mold 300 in which the insert part 50 is arranged, thereby integrally molding the insert part 50 and the resin 60.

[0156] According to the insert molding method of the second embodiment, in the insert molding die part mounting step, the multiple elastic parts 11 are arranged in the fixed die 200 or the movable die 300 in the circumferential direction while widening the mutual intervals between adjacent elastic parts 11 from one end side toward the other end side to form the cylindrical part 22, and in the insert part holding step, the insert part 50 is inserted into the cylinder at one end side of the smaller diameter side of the cylindrical part 22 formed by the multiple elastic parts 11, and in this state, when an external force is applied from the inside to the cylindrical part 22, that is, the multiple elastic parts 11 are inserted into the cylinder at one end side of the smaller diameter side of the cylindrical part 22 formed by the multiple elastic parts 11, When the large diameter shaft portion 31b of the shaft portion 31 is inserted into the annular space at the smaller diameter end side of the tubular portion 22, which is formed by multiple elastic portions 11, and the insert part 50 is inserted in a state in which the smaller diameter end side of the tubular portion 22 is expanded in diameter, the smaller diameter end side of the tubular portion 22 reduces in diameter, but the multiple elastic portions 11 at the smaller diameter end side of the tubular portion 22 elastically deform in the expanding diameter direction from the initial state, and the multiple elastic portions 11 are elastically held in contact with or in contact with each other in the annular portion 21 relative to the entire circumferential direction of the insert part 50.

[0157] That is, the multiple elastic parts 11 are arranged in the mold 100 with the mutual intervals between adjacent elastic parts 11 expanded from one end side to the other end side to form the cylindrical part 22, and when an external force is applied to the cylindrical part 22, the intervals between adjacent elastic parts 11 change due to the elastic deformation of the multiple elastic parts 11 at the small-diameter one end side of the cylindrical part 22, and the cylindrical part 22 expands in diameter, and the multiple elastic parts 11 elastically contact the outer circumferential surface of the insert part 50 at the annular part 21 where the multiple elastic parts 11 are close to or in contact with each other, so that the insert part 50 is elastically held in the radial direction over its entire circumferential direction by the annular part 21 where the multiple elastic parts 11 are close to or in contact with each other. In this state, the cavity 400 in which the insert part 50 is arranged is filled with resin 60, and the insert part 50 and the resin 60 are molded integrally with each other.

[0158] Therefore, the elastic deformation of the elastic parts 11 at the small-diameter end side of the cylindrical part 22 causes adjacent elastic parts 11 to approach or abut against each other at the annular part 21, whereby the multiple elastic parts 11 are elastically held in contact with the entire outer circumferential direction of the insert part 50 in the radial direction, so that even if there is variation in the dimensional accuracy of the insert part 50, the multiple elastic parts 11 can be brought into close contact with the entire circumferential direction of the insert part 50, thereby enhancing the effect of suppressing the generation of burrs in the resin 60 during insert molding. Furthermore, since the multiple elastic parts 11 elastically hold the insert part 50 in the radial direction with respect to the entire circumferential direction, and the insert part 50 is not biased in a fixed direction, deformation of the insert part 50 is unlikely to occur. Thus, in the insert molding method according to the second embodiment, deformation of the insert part 50 is less likely to occur, and the effect of suppressing the occurrence of burrs can be enhanced.

[0159] In the above embodiments 1 and 2 and variant 1, examples have been described in which the insert part 50 is a cylindrical collar member. However, when implementing the present invention, the insert part 50 may be a metal fitting such as a washer or a nut. In addition, the cylindrical portion 22 is described as being substantially truncated cone-shaped in order to elastically hold the cylindrical insert part 50, but when implementing the present invention, the shape of the insert part 50 is not limited to cylindrical or columnar, and for example, the insert part 50 may be elastically held by the cylindrical portion 22 in a square tube, a square column, or a rectangular parallelepiped shape. In this case, by making the width of each elastic portion 11 different or by making the interval between adjacent elastic portions 11 from one end side to the other end different, even if the insert part 50 is square tube, square column, rectangular parallelepiped, or the like, the one end side of the cylindrical portion 22 can be elastically held by elastically contacting the entire periphery, and the cylindrical portion 22 can be, for example, substantially truncated pyramid-shaped. In addition, the number of elastic portions 11 is not limited. Furthermore, the elastic portion 11, the cylindrical portion 22, and the shaft portion 31 as the insert molding mold parts 10 are not limited to being made of metal as long as they have a certain level of heat resistance, and can also be made of ceramic, rubber, resin, etc.

[0160] In carrying out the present invention, the configuration, material, size, connection relationship, manufacturing method, etc. of the insert molding die parts and other parts of the insert molding die are not limited to those in the above-mentioned embodiment. Furthermore, the above-mentioned numerical ranges are not strict and are, of course, approximate values ​​including errors due to measurement, etc., and errors of several tens of percent are not denied. Furthermore, the numerical values ​​given in the embodiment of the present invention do not indicate critical values, but indicate appropriate values ​​suitable for carrying out the invention, so even if the above numerical values ​​are slightly changed, the implementation of the invention is not denied. [Explanation of symbols]

[0161] 10. Insert molding die parts 11 Elastic part 21 Circular section 22, 22A Cylindrical part 31 Shaft 100 Insert molding mold 200 Fixed side mold 300 Movable side mold

Claims

1. The tapered cylindrical portion is formed by a plurality of elastic portions arranged in a circumferential direction in a mold with the spacing between adjacent elastic portions increasing from one end side to the other end side, and the tapered cylindrical portion increases in diameter from the one end side to the other end side, The cylindrical portion is a mold part for insert molding, characterized in that the elastic portion elastically deforms in the radial direction at the one end side and adjacent elastic portions are close to or abut each other at an annular portion where they elastically contact the outer peripheral surface of the insert part inserted into the cylindrical portion, thereby elastically holding the insert part in the radial direction over its entire circumferential direction.

2. 2. The mold part for insert molding according to claim 1, wherein the elastic portion has a curved leaf spring shape with the one end side being formed to be thin.

3. A mold for insert molding having a fixed mold and a movable mold, The tapered cylindrical portion is formed by a plurality of elastic portions arranged in a circumferential direction in the fixed mold or the movable mold with the spacing between adjacent elastic portions increasing from one end side to the other end side, and the tapered cylindrical portion increases in diameter from the one end side to the other end side, The cylindrical portion elastically holds the insert part in the radial direction over its entire circumferential direction by elastically deforming in the radial direction at the one end side of the elastic portion and elastically contacting the outer peripheral surface of the insert part inserted into the cylindrical portion at an annular portion where adjacent elastic portions are close to or abutting each other.

4. 4. The mold for insert molding according to claim 3, further comprising a shaft portion that is passed through the cylindrical portion and positions the insert part.

5. The insert molding die according to claim 3, characterized in that the cylindrical portion elastically holds the insert part in the radial direction around its entire circumferential direction by the multiple elastic portions elastically deforming in a radial contraction direction due to an external force applied from the outside, or by the multiple elastic portions elastically deforming in a radial expansion direction due to an external force applied from the inside.

6. a step of mounting a die component for insert molding in which a tapered cylindrical portion having a diameter increasing from one end side to the other end side, the tapered cylindrical portion being formed of a plurality of elastic portions arranged in a circumferential direction with the spacing between adjacent elastic portions increasing from one end side to the other end side, is disposed in a fixed die or a movable die; an insert part holding process in which an external force is applied from the outside to the cylindrical part, so that the elastic part is elastically deformed in a diameter contraction direction at the one end side of the cylindrical part, and adjacent elastic parts are brought into close proximity or abutment with each other at an annular part where they come into elastic contact with the outer circumferential surface of the insert part inserted into the cylindrical part, thereby elastically holding the insert part in the radial direction over the entire circumferential direction; or an external force is applied from the inside to the cylindrical part, so that the elastic part is elastically deformed in a diameter expansion direction at the one end side of the cylindrical part, and adjacent elastic parts are brought into close proximity or abutment with each other at an annular part where they come into elastic contact with the outer circumferential surface of the insert part inserted into the cylindrical part, thereby elastically holding the insert part in the radial direction over the entire circumferential direction; a molding process of filling a cavity formed between the fixed mold and the movable mold in a mold-clamped state, in which the insert part is disposed, with resin, and integrally molding the insert part and the resin to form an insert resin molded product; A method for producing an insert resin molded product, comprising:

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