Insert-molded article manufacturing method, insert-molding mold, and insert-molded article

Abstract

The present application aims to provide an insert-molded article manufacturing method, an insert-molding mold, and an insert-molded article, which can properly assemble a metal collar to a resin molded portion. The insert-molded article manufacturing method includes: an insert placement process (step S1) of disposing a metal collar (10) including a cylindrical portion (11) in a first mold (100) in a manner that an axis (CL1) of the cylindrical portion (11) is along a mold clamping direction; a mold clamping process (step S2) of clamping a second mold (200) including a pressing protrusion (215) that abuts against and presses an end surface (11a) of the cylindrical portion (11) to the first mold (100), thereby forming a locking protrusion (15) on an outer periphery (outer peripheral surface 11d) of the cylindrical portion (11) by the pressing protrusion (215); and a molding process (step S3) of filling a resin to a cavity (250) formed around the cylindrical portion (11) by the first mold (100) and the second mold (200) clamped in the mold clamping process (step S2).

Description

Technical Field

[0001] This invention relates to a method for manufacturing insert molding parts, a mold for insert molding, and insert molding parts. Background Technology

[0002] As a technology related to conventional insert molding manufacturing methods, insert molding molds, and insert molding parts, for example, Patent Document 1 discloses an insert molding manufacturing method, insert molding mold, and insert molding part in which, after a collar made of a metal material with deformable portions formed at both ends is placed in a molding mold, the upper mold and the lower mold are brought close together to flatten the deformable portions, and molding is performed in a state where the flat surface formed by the flattened deformable portions is in close contact with the upper mold or the lower mold.

[0003] Existing technical documents Patent documents

[0004] Patent Document 1: Japanese Patent Application Publication No. 2004-42561 Summary of the Invention

[0005] The technical problem that the invention aims to solve

[0006] However, such a method for manufacturing insert molding parts, the mold for insert molding, and the insert molding parts themselves may be configured such that the outer periphery of the metal collar is knurled, making it difficult for them to detach from the resin molding part. Furthermore, there is room for further improvement regarding the structure of assembling the metal collar into the resin molding part.

[0007] The present invention was made in view of the above circumstances, and its object is to provide a method for manufacturing an insert molding part capable of properly assembling a metal collar into a resin molding part, an insert molding mold, and an insert molding part.

[0008] Technical solutions for solving technical problems

[0009] To achieve the above objectives, the insert molding method of the present invention includes: an insert placement step, in which a metal collar including a cylindrical portion is disposed in a first mold such that the axis of the cylindrical portion is along a mold closing direction; a mold closing step, in which a second mold including a pressing protrusion that abuts against and presses against the end face of the cylindrical portion is closed with the first mold, thereby forming a locking protrusion on the outer periphery of the cylindrical portion by means of the pressing protrusion; and a molding step, in which resin is filled into a cavity formed around the cylindrical portion by means of the first mold and the second mold closed in the mold closing step.

[0010] To achieve the above objectives, the insert forming mold of the present invention includes: a first mold, comprising: a first mold including a mounting surface and a first cavity forming surface adjacent to the mounting surface, the mounting surface being a surface on which one end face of the metal collar, including the cylindrical portion, is mounted along the mold closing direction along the axis of the cylindrical portion; a second mold including an insertion portion, a collar end face abutment surface, a pressing protrusion, and a second cavity forming surface, the insertion portion being formed in a columnar shape and inserted into the inner side of the cylindrical portion, the collar end face abutment surface being disposed radially outward of the insertion portion and abutting against the end face of the other side of the metal collar, the pressing protrusion protruding from the collar end face abutment surface and abutting against the end face of the other side of the cylindrical portion for pressing, the second cavity forming surface being adjacent to the collar end face abutment surface; the first cavity forming surface being shallower than the mounting surface, and the second cavity forming surface being shallower than the collar end face abutment surface.

[0011] To achieve the above objectives, the insert molding member of the present invention comprises: a metal collar including a cylindrical portion; a resin molding portion on which the metal collar is assembled; the cylindrical portion having: a recess recessed from an end face side and an outer peripheral face side of the cylindrical portion; and a locking protrusion protruding from the recess toward the radially outer side of the cylindrical portion and biting into the resin molding portion.

[0012] Invention Effects

[0013] The insert molding method, insert molding mold, and insert molding part of the present invention have the effect of properly assembling a metal collar into a resin molding part. Attached Figure Description

[0014] Figure 1 This is a perspective view of the insert molding part as shown in the embodiment, viewed from above.

[0015] Figure 2 This is a perspective view of the insert molding part as shown in the embodiment, viewed from below.

[0016] Figure 3 yes Figure 1 Section III-III.

[0017] Figure 4 yes Figure 1 Section IV-IV.

[0018] Figure 5 This is a perspective view showing a metal collar assembled on an insert molding component according to an embodiment.

[0019] Figure 6 This indicates that the first mold and the second mold of the insert molding mold in the embodiment are separated, and a metal collar is disposed on the first mold, which is equivalent to... Figure 1A cross-sectional view of section III-III.

[0020] Figure 7 This is a perspective view of the metal collar support portion of the first mold in the embodiment.

[0021] Figure 8 This is a perspective view of the insert component of the second mold in the embodiment.

[0022] Figure 9 This is a perspective view showing the insertion portion forming a recess and an insert component of the second mold according to the embodiment.

[0023] Figure 10 This is a flowchart illustrating an embodiment of a method for manufacturing an insert molding part.

[0024] Figure 11 This indicates the state in which the insert molding mold of the embodiment is closed to form a cavity, equivalent to... Figure 1 A cross-sectional view of section III-III.

[0025] Figure 12 This indicates the state in which the insert molding mold of the embodiment is closed to form a cavity, equivalent to... Figure 1 A cross-sectional view of section IV-IV.

[0026] Explanation of reference numerals in the attached figures

[0027] 1: Insert molding parts; 10: Metal collar; 11: Cylindrical section (tube section); 11a: End face; 11b: End face; 11c: Inner circumferential surface; 11d: outer peripheral surface; 12: Flange portion; 15: Locking protrusion; 16: concave part; 20: Resin molding section; 50: Molds for insert forming; 100: First mold; 101a: First cavity forming surface; 111: Placement surface; 200: Second mold; 202: Insert component; 210: Insertion section; 215: Press the protrusion; 231: Collar end face contact surface; 232: Second cavity forming surface; 250: Cavity; CL1: Axis; CL2: Axis; D1: Mold closing direction. Detailed Implementation

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to these embodiments. Furthermore, the constituent elements in the following embodiments include elements that can and are easily substituted by those skilled in the art, or substantially the same elements.

[0029] [Implementation Method] Figures 1-4 The insert molding member 1 shown in this embodiment can be, for example, a protector assembled into a wiring harness in a vehicle such as an automobile. Here, the wiring harness, for example, is a bundled assembly of multiple wiring components used for power supply and signal communication for connection between various devices mounted in the vehicle, and the multiple wiring components are connected to each device using connectors or the like. The wiring component is, for example, an insulated wire formed by bundling multiple bare metal wires with conductive cores and covering them with an insulating sheath. The wiring component may also be formed by bundling multiple insulated wires. The protector, as the insert molding member 1, protects the wiring components that are internally routed and is fixed to the vehicle, restricting the wiring path of the wiring components.

[0030] The protector, which is an insert molding member 1, includes a metal collar 10 and a resin molding portion 20 that forms the main body of the protector to which the metal collar 10 is assembled. The metal collar 10 is made of, for example, a conductive metal material and is formed in a generally cylindrical shape around an axis CL1. The metal collar 10 includes a cylindrical portion 11 (cylindrical portion) formed in a generally cylindrical shape and a flange portion 12 formed on the outer periphery of the cylindrical portion 11 at one end in the direction of the axis CL1.

[0031] Furthermore, in the following description, one side of the metal collar 10 in the direction of the axis CL1 will be referred to as the lower side, and the other side will be referred to as the upper side.

[0032] Although not shown, the insert molding 1, for example, contacts the round terminal of the grounding terminal with the upper end face 11a of the cylindrical portion 11 of the metal collar 10, and the lower end face 11b (the lower surface 12b of the flange portion 12) contacts the vehicle body, etc., by inserting a bolt through the cylindrical portion 11 and fixing it to the vehicle body, etc., together with the grounding terminal. Thus, the grounding terminal is electrically connected to the vehicle body, etc., via the metal collar 10. The end faces 11a and 11b (the lower surface 12b of the flange portion 12) of the cylindrical portion 11 are formed as flat surfaces.

[0033] like Figures 3-5As shown, the upper end face 11a of the cylindrical portion 11 of the metal collar 10 is a generally annular flat surface. Four locking protrusions 15 are provided at equal intervals around the axis CL1 of the metal collar 10 on the outer peripheral surface 11d (i.e., the outer periphery of the cylindrical portion 11) on the end face 11a side of the cylindrical portion 11. The locking protrusions 15 protrude from the lower side (bottom side) of the recess 16 recessed from the end face 11a side and the outer peripheral surface 11d side of the cylindrical portion 11 toward the radially outer side of the cylindrical portion 11 (in other words, the outer side in a direction orthogonally intersecting the axis CL1).

[0034] In addition, such as Figure 2 and Figure 4 As shown, the upper surface 12a of the flange portion 12 of the metal collar 10 abuts against the lower surface 21 of the resin molding portion 20. The flange portion 12 protrudes from the lower surface 21 of the resin molding portion 20. The flange portion 12 prevents the metal collar 10 from falling upward.

[0035] like Figure 6 As shown, the insert molding die 50 for manufacturing the insert molded part 1 has a first die 100 and a second die 200. For example, the insert molding die 50 can have the first die 100 positioned on the lower fixed side of a vertical injection molding apparatus, and the second die 200 positioned on the upper movable side. The first die 100 and the second die 200 are brought close together to close, and separated to open. Specifically, the second die 200 moves from the upper side to the lower side to close, as shown in the mold closing direction D1, and opens by moving to the opposite side of the mold closing direction D1, i.e., from the lower side to the upper side.

[0036] The first mold 100 has a first mold body 101 and a metal collar support portion 110 disposed on the first mold body 101. The upper surface of the first mold body 101 is formed into a flat surface, becoming a first cavity forming surface 101a. The metal collar support portion 110 and the insertion portion of the second mold 200 (described later) form a recess 203 and an insert member 202, which are concentrically arranged. The metal collar support portion 110 supports the metal collar 10, which includes a cylindrical portion 11. The metal collar support portion 110 is disposed on the first cavity forming surface 101a of the first mold body 101.

[0037] Specifically, such as Figure 6 and Figure 7As shown, the metal collar support portion 110 has a mounting surface 111 that abuts against the lower end face 11b (lower surface 12b of the flange portion 12) of the cylindrical portion 11 of the metal collar 10. The mounting surface 111 is formed as the bottom surface of an annular groove. A collar support post 112, which is formed as a thin cylindrical shape, is formed on the inner side of the mounting surface 111. The collar support post 112 is inserted into the cylindrical portion 11 from the lower side of the metal collar 10. The outer peripheral surface 112a of the collar support post 112 abuts against the inner peripheral surface 11c of the metal collar 10. In addition, the annular peripheral surface 111a, which is erected on the outer edge of the mounting surface 111, abuts against the outer peripheral surface 12c of the flange portion 12 of the metal collar 10. Therefore, the movement of the metal collar 10 in the direction horizontal relative to the first cavity forming surface 101a is restricted by the metal collar support portion 110.

[0038] In addition, such as Figure 6 As shown, the distance from the first cavity forming surface 101a to the mounting surface 111 (i.e., the depth of the mounting surface 111) is equal to the thickness of the flange portion 12 of the metal collar 10. In other words, the first cavity forming surface 101a is formed to be shallower than the mounting surface 111. In addition, the first cavity forming surface 101a is disposed adjacent to the mounting surface 111 on the radially outer side of the mounting surface 111.

[0039] like Figure 6 As shown, the second mold 200 includes a second mold body 201 and an insert component 202 detachably disposed on the second mold body 201. The insert component 202 includes an insertion portion 210 for inserting into the cylindrical portion 11 of the metal collar 10. More specifically, as Figure 8 As shown, the insert member 202 has a generally cylindrical insert member body 220 formed in a columnar shape. The insertion portion 210 is formed as a thin, generally cylindrical, columnar shape protruding from the lower surface 220a of one side (lower side) of the insert member body 220. The thickness of the insertion portion 210 in the vertical direction is formed to be sufficiently thin compared to the thickness of the insert member body 220 in the vertical direction. The axis of the insertion portion 210 is concentric with the axis of the insert member body 220. The diameter of the insertion portion 210 is smaller than the diameter of the insert member body 220. Therefore, around the base 211 of the insertion portion 210, the lower surface 220a of the insert member 202 (which is also the lower surface of the insert member body 220) is exposed in an annular shape. The portion of the lower surface 220a that is exposed in an annular shape is the collar end face abutment surface 231.

[0040] The insert component 202 is provided with pressing protrusions 215 that protrude downward from the collar end face abutment surface 231. Four pressing protrusions 215 are equally spaced around the axis CL2 of the insert component 202 on the outer side of the insertion portion 210. The pressing protrusions 215 protrude from the collar end face abutment surface 231. In this embodiment, the pressing protrusions 215 are provided along the outer edge of the collar end face abutment surface 231 of the insert component 202. Therefore, the radially outer surface of the pressing protrusions 215 is continuous with the outer peripheral surface of the insert component body 220.

[0041] Furthermore, when viewed from the axis CL2, the pressing protrusion 215 is formed in an arc shape along the outer edge of the circular collar end face abutment surface 231 (i.e., the outer edge of the end face 11a of the cylindrical portion 11 of the metal collar 10). Thus, in the mold closing process (step S2) described later, the entire lower surface of the pressing protrusion 215 can be pressed against the outer edge of the end face 11a of the cylindrical portion 11, and the entire pressing protrusion 215 can be used to form the locking protrusion 15.

[0042] Back Figure 6 The lower surface of the second mold body 201 is formed into a flat surface, becoming the cavity surface 201a. A circular through-hole 201b is provided in the second mold body 201 to facilitate the assembly of the insert component 202. The insert component 202 is easily assembled and disassembled into the mounting hole 201b. Figure 6 and Figure 9 As shown, a circular insertion recess 203 is provided on the lower side of the mounting hole 201b, formed concavely from the cavity surface 201a. The insertion recess 203 is concentrically arranged with the mounting hole 201b. The diameter of the insertion recess 203 is larger than that of the mounting hole 201b.

[0043] In the recess 203 formed in the insertion portion, a second annular cavity forming surface 232 is formed adjacent to the collar end face abutment surface 231 at a position radially outward from the collar end face abutment surface 231 of the insert member 202. The cavity 250 includes the second cavity forming surface 232. The second cavity forming surface 232 is formed as a flat surface. The second cavity forming surface 232 is formed to be slightly shallower than the collar end face abutment surface 231 of the insert member 202. The second cavity forming surface 232 is formed to be shallower than the collar end face abutment surface 231 to the extent that the end face 11a on the upper side of the molded metal collar 10 slightly protrudes from the upper surface 22 of the resin molding portion 20.

[0044] The first mold 100 and the second mold 200 each have a parting surface (not shown). The first mold 100 and the second mold 200 are brought close together so that their parting surfaces abut each other to close the mold. By closing the first mold 100 and the second mold 200, a cavity 250 (see reference) is formed around the cylindrical portion 11 of the metal collar 10 as a closed space using the cavity forming surfaces, including the first cavity forming surface 101a of the first mold 100, the cavity surface 201a of the second mold 200, and the second cavity forming surface 232. Figure 11 and Figure 12 ).

[0045] like Figure 10 As shown, the method for manufacturing an insert molding part 1 using an insert molding mold 50 includes an insert placement process (step S1), a mold closing process (step S2), and a molding process (step S3).

[0046] Insert placement process (step S1): as follows Figure 6 As shown, in the insert placement process (step S1), the insert forming mold 50 is opened, and the metal collar 10 is positioned in the first mold 100 with the axis CL1 of the cylindrical portion 11 along the mold closing direction D1. Specifically, the metal collar 10 is positioned in the metal collar support portion 110 of the first mold 100 with the flange portion 12 facing the first mold 100. At this time, the lower surface 12b of the flange portion 12 abuts against the mounting surface 111 of the metal collar support portion 110, and the collar support post 112 is inserted into the inner circumferential surface 11c of the cylindrical portion 11 of the metal collar 10. In addition, the upper surface 12a of the flange portion 12 of the metal collar 10 is configured to be substantially continuous with the first cavity forming surface 101a of the first mold 100.

[0047] Mold closing process (step S2): In the mold closing process (step S2), after the insert placement process (step S1), the second mold 200 is moved in the mold closing direction D1, as follows. Figure 11 and Figure 12 As shown, the first mold 100 and the second mold 200 are closed. By closing the first mold 100 and the second mold 200, the insertion portion 210 of the second mold 200 is inserted into the inner circumferential surface 11c of the cylindrical portion 11 of the metal collar 10. At this time, the pressing protrusion 215 of the second mold 200 abuts against the end face 11a of the cylindrical portion 11 of the metal collar 10 to press it down. The pressing protrusion 215 abuts against the outer edge portion of the end face 11a. When the first mold 100 and the second mold 200 abut against each other to complete the mold closing, the pressing protrusion 215 forms a locking protrusion 15 and a recess 16 in the cylindrical portion 11 of the metal collar 10. When the mold closing is complete, the collar end face abutting surface 231 abuts against the end face 11a of the cylindrical portion 11.

[0048] That is, in the mold closing process (step S2), the insertion part 210 is inserted into the inner side of the cylindrical part 11 by closing the first mold 100 and the second mold 200, and a plurality of four locking protrusions 15 are formed by the multiple pressing protrusions 215. In addition, in the mold closing process (step S2), the pressing protrusions 215 press the outer periphery of the end face 11a of the cylindrical part 11 to form a recess 16, and the locking protrusions 15 are formed protruding from the recess 16. Then, in the mold closing process (step S2), the first mold 100 and the second mold 200 are closed, and the collar end face abutment surface 231 abuts against the end face 11a of the cylindrical part 11.

[0049] Molding process (step S3): as follows Figure 11 and Figure 12 As shown, in the molding process (step S3), resin is filled into the cavity 250 formed around the cylindrical portion 11 by closing the mold 50 for insert molding through the mold closing process (step S2).

[0050] After the molding process (step S3) is completed, the second mold 200 is raised to open the first mold 100 and the second mold 200, and the molded insert part 1 is taken out from the first mold 100. In this way, by using the insert molding mold 50, the insert part 1 can be obtained.

[0051] The above-described method for manufacturing an insert molding part includes: an insert placement process (step S1), in which a metal collar 10 including a cylindrical portion 11 is disposed in a first mold 100 with the axis CL1 of the cylindrical portion 11 along the mold closing direction D1; a mold closing process (step S2), in which a second mold 200 including a pressing protrusion 215 that abuts against and presses against the end face 11a of the cylindrical portion 11 is closed with the first mold 100, thereby forming a locking protrusion 15 on the outer periphery (outer peripheral surface 11d) of the cylindrical portion 11 by means of the pressing protrusion 215; and a molding process (step S3), in which resin is filled into a cavity 250 formed around the cylindrical portion 11 by means of the first mold 100 and the second mold 200 that are closed in the mold closing process (step S2).

[0052] Therefore, the insert molding member 1 allows the locking protrusion 15 protruding from the cylindrical portion 11 of the metal collar 10 to engage with the resin molding portion 20, thereby assembling the metal collar 10 onto the resin molding portion 20. Thus, the metal collar 10 achieves reliable vertical anti-detachment by engaging with the resin molding portion 20 through the locking protrusion 15. For example, as a protector for a wiring harness installation in a vehicle, the insert molding member 1 is mounted on a wire harness, and the metal collar 10 is fastened to the vehicle body along with the grounding terminal using bolts. In this case, the insert molding member 1 can also reduce the likelihood of the metal collar 10 easily detaching from the resin molding portion 20 due to bolt tightening, vibrations during vehicle operation, etc. Thus, according to the insert molding member manufacturing method of this embodiment, the metal collar 10 can be properly assembled onto the resin molding portion 20.

[0053] That is, according to this embodiment, even if a metal collar with a known form, such as having a cylindrical portion 11 and a flange portion 12, is used for insert molding assembled into the resin molding portion 20, it is possible to obtain an insert molding part 1 that prevents the metal collar 10 from falling off the resin molding portion 20. Therefore, it is not necessary to perform additional processing such as knurling on the metal collar.

[0054] Furthermore, the second mold 200 includes an insertion portion 210 formed in a cylindrical shape and inserted into the inner side of the cylindrical portion 11. Multiple pressing protrusions 215 are spaced apart on the outer side of the insertion portion 210 around the axis CL2 (i.e., axis CL1). In the mold closing process (step S2), the insertion portion 210 is inserted into the inner side of the cylindrical portion 11 by closing the first mold 100 and the second mold 200, and multiple locking protrusions 15 are formed by the multiple pressing protrusions 215. Thus, the insertion portion 210 is inserted into the cylindrical portion 11, restricting its movement in a direction parallel to the plane orthogonal to the axis CL1, thereby positioning the metal collar 10. Specifically, the upper side of the cylindrical portion 11 is positioned. Furthermore, the multiple pressing protrusions 215 abut against the cylindrical portion 11 of the positioned metal collar 10 and press, forming multiple locking protrusions 15. The cylindrical portion 11 is supported by the insertion portion 210, so the pressing protrusion 215 reliably presses the end face 11a.

[0055] Furthermore, the metal collar 10 includes a flange portion 12 formed on the outer periphery of the cylindrical portion 11. During the insert placement process (step S1), the metal collar 10 is positioned with the flange portion 12 facing the first mold 100. Thus, the flange portion 12 can be used to prevent the metal collar 10 assembled in the resin molding portion 20 from falling off to one side.

[0056] Furthermore, the pressing protrusion 215 is configured to press against the outer periphery of the end face 11a of the cylindrical portion 11. In the mold closing process (step S2), the pressing protrusion 215 presses against the outer periphery of the end face 11a of the cylindrical portion 11 to form a recess 16, and a locking protrusion 15 protrudes from the recess 16. Thus, for example, the locking protrusion 15 can be formed by cutting the cylindrical portion 11 from the outer periphery of the end face 11a of the cylindrical portion 11 through the pressing protrusion 215. In other words, the locking protrusion 15 can be formed like a chip. Therefore, since the force applied to the pressing protrusion 215 can be reduced, the life of the mold (insert member 202) can be further extended.

[0057] Furthermore, the second mold 200 has a collar end face abutment surface 231 that abuts against the end face 11a of the cylindrical portion 11, and a second cavity forming surface 232 adjacent to the collar end face abutment surface 231 and forming a cavity 250. The second cavity forming surface 232 is formed shallower than the collar end face abutment surface 231. A pressing protrusion 215 protrudes from the collar end face abutment surface 231. In the mold closing process (step S2), the collar end face abutment surface 231 abuts against the end face 11a of the cylindrical portion 11 by closing the first mold 100 and the second mold 200. In the molding process (step S3), resin is filled into the cavity 250 including the second cavity forming surface 232. As a result, the end face 11a of the cylindrical portion 11 can protrude from the upper surface 22 of the resin molding portion 20, for example, so that the grounding terminal can reliably abut against the end face 11a.

[0058] Additionally, the insert forming mold 50 includes: a first mold 100, which includes a mounting surface 111 and a first cavity forming surface 101a adjacent to the mounting surface 111, the mounting surface 111 being a surface on which one side, i.e., the lower end face (lower surface 12b), of the metal collar 10, including the cylindrical portion 11, is mounted along the mold closing direction D1 with the axis CL1 of the cylindrical portion 11 of the cylindrical portion 11 as the axis CL1; and a second mold 200, which includes an insertion portion 210 formed in a columnar shape and inserted into the inner side of the cylindrical portion 11, and is provided with... The insert 231 is located radially outside the insertion portion 210 and abuts against the end face 11a of the metal collar on the other side, i.e., the upper side. A pressing protrusion 215 protrudes from the collar end face abutment surface 231 and abuts against the end face 11a of the cylindrical portion 11 for pressing. A second cavity forming surface 232 is adjacent to the collar end face abutment surface 231. The first cavity forming surface 101a is formed shallower than the mounting surface 111, and the second cavity forming surface 232 is formed shallower than the collar end face abutment surface 231. Thus, using the molding die 50, the locking protrusion 15 can be manufactured to engage with the resin molding portion 20 in a biting manner, and the metal collar 10 can be reliably assembled into the insert molding member 1 of the resin molding portion 20 in a manner where its upper and lower ends are reliably exposed.

[0059] Furthermore, the second mold 200 includes: an insert component 202, which includes an insertion portion 210, a collar end face abutment surface 231, and a pressing protrusion 215; and a second mold body 201, which is detachably provided with the insert component 202 and includes a second cavity forming surface 232. Therefore, if the pressing protrusion 215 wears out, it can be replaced with a new insert component 202 without having to remanufacture the entire second mold 200.

[0060] Furthermore, the insert molding 1 includes: a metal collar 10, which includes a cylindrical portion 11; and a resin molding portion 20 on which the metal collar 10 is assembled. The cylindrical portion 11 has: a recess 16 recessed from the end face 11a side and the outer peripheral surface 11d side of the cylindrical portion 11; and a locking protrusion 15 protruding from the recess 16 toward the radially outer side of the cylindrical portion 11 and engaging with the resin molding portion 20. Thus, by locking the locking protrusion 15 into the resin molding portion 20, detachment in the axial CL1 direction is prevented, and the insert molding 1 can be made such that the metal collar 10 is properly assembled into the resin molding portion 20.

[0061] It should be noted that the insert molding method, insert molding mold and insert molding part of the above embodiments of the present invention are not limited to the above embodiments, and various modifications can be made within the scope of the claims.

[0062] In the above description, the metal collar 10 is provided with a flange portion 12, but a metal collar without a flange portion 12 (i.e., only having a cylindrical portion 11) may also be used. Furthermore, the metal collar 10 is formed in a generally cylindrical shape in this embodiment, including the cylindrical portion 11, but a generally cylindrical metal collar, such as one formed in a generally square cylindrical shape, may also be used. One or more locking protrusions 15 may be provided. In this embodiment, the insert member 202 is formed to be easily detachable from the second mold 200 and to facilitate replacement of the insert member 202, but the insertion portion 210, the collar end face abutment surface 231, and the pressing protrusion 215 may also be directly provided on the second mold body 201 of the second mold 200.

[0063] The insert molding method, insert molding die, and insert molding part of this embodiment can be configured by appropriately combining the constituent elements of the embodiments and variations described above.

Claims

1. A method for manufacturing an insert molding part, characterized in that, include: In the insert placement process, a metal collar including a cylindrical portion is placed in the first mold with the axis of the cylindrical portion along the mold closing direction; In the mold closing process, a second mold, including a pressing protrusion that abuts against and presses against the end face of the cylindrical part, is closed with the first mold, thereby using the pressing protrusion to form a locking protrusion on the outer periphery of the cylindrical part; In the molding process, resin is filled into the cavity formed around the cylindrical portion using the first mold and the second mold that are closed in the molding process.

2. The method for manufacturing an insert molding part according to claim 1, characterized in that, The second mold includes an insertion portion formed in a columnar shape and inserted into the inner side of the cylindrical portion. The pressing protrusions are provided in multiple spaces around the axis on the outer side of the insertion part. In the mold closing process, the insertion part is inserted into the inner side of the cylindrical part by closing the first mold and the second mold, and a plurality of locking protrusions are formed by the plurality of pressing protrusions.

3. The method for manufacturing an insert molding part according to claim 1, characterized in that, The metal collar includes a flange formed on the outer periphery of the cylindrical portion. In the insert placement process, the metal collar is configured such that the flange faces the first mold side.

4. The method for manufacturing an insert molding part according to claim 1, characterized in that, The pressing protrusion is configured to abut against the outer periphery of the end face of the cylinder for pressing. In the mold closing process, the outer periphery of the end face of the cylindrical part is pressed by the pressing protrusion to form a recess, and the locking protrusion protrudes from the recess.

5. The method for manufacturing an insert molding part according to any one of claims 1 to 4, characterized in that, The second mold has: a collar end face abutting surface that abuts against the end face of the cylindrical portion; and a second cavity forming surface that is adjacent to the collar end face abutting surface and forms the cavity. The second cavity forming surface is shallower than the abutting surface of the collar end face. The pressing protrusion is formed from the abutment surface of the collar end face. In the mold-closing process, the first mold and the second mold are closed together, causing the end face of the collar to abut against the end face of the cylindrical portion. In the molding process, the resin is filled into the cavity including the second cavity forming surface.

6. A mold for insert forming, characterized in that, include: A first mold includes a mounting surface and a first cavity forming surface adjacent to the mounting surface, the mounting surface being a surface on one end face of a metal collar, the axis of which is along the mold closing direction. The second mold includes an insertion part, a collar end face abutment surface, a pressing protrusion, and a second cavity forming surface. The insertion part is formed in a column shape and inserted into the inner side of the cylindrical part. The collar end face abutment surface is disposed on the radially outer side of the insertion part and abuts against the end face of the other side of the metal collar. The pressing protrusion protrudes from the collar end face abutment surface and abuts against the end face of the other side of the cylindrical part to press. The second cavity forming surface is adjacent to the collar end face abutment surface. The first cavity forming surface is shallower than the mounting surface. The second cavity forming surface is shallower than the abutting surface of the collar end face.

7. The insert forming mold according to claim 6, characterized in that, The second mold has: an insert component, which includes the insertion part, the collar end face abutment surface and the pressing protrusion; and a second mold body, which is detachably provided with the insert component and includes the second cavity forming surface.

8. An insert molding, characterized in that, have: A metal collar, comprising a cylindrical portion; A resin molding section, on which the metal collar is assembled; The cylindrical portion has a recess that is recessed from the end face side and the outer peripheral face side of the cylindrical portion; A locking protrusion protrudes radially outward from the recess toward the outer side of the cylindrical portion and engages with the resin molding portion.

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