Mold, casting manufacturing device, casting manufacturing method, and casting

Abstract

A mold (20) is provided with: a mold body (25) provided with a fixed mold (30) and a movable mold (40) that can approach or separate from the fixed mold (30); a molding space (60) which is partitioned by the fixed mold (30) and the movable mold (40) and in which a pipe (100) can be disposed; an injection port (65) capable of injecting the molten metal material (120) into the molding space (60); a holding section (42) that holds both ends of the tube (100); and a protruding member (70) that restricts movement of the tube (100) within the molding space (60) when the molten metal material (120) is injected into the molding space (60).

Description

Technical Field

[0001] This invention relates to molds, casting manufacturing apparatus, casting manufacturing methods, and castings. Background Technology

[0002] Traditionally, a method called inlay casting has been used in the manufacture of castings. For example, in castings manufactured by inlay casting, a tube (e.g., a hollow tube) pre-fabricated and manufactured separately from the casting itself is assembled. More specifically, in inlay casting, a hollow tube is pre-placed within a mold used to manufacture the casting, and then molten metal, such as aluminum alloy, is poured into the mold. This produces a casting with the hollow tube assembled within it. Examples of castings with assembled hollow tubes include the housing of a drive motor.

[0003] For example, Patent Document 1 discloses a method for manufacturing a casting in which a smart core filled with a filling material is inserted into a mold having a cavity, and after molten metal is injected into the cavity, the filling material inside the smart core is removed.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-124743 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in Patent Document 1, molten metal is injected into the mold cavity while the smart core is positioned there, which could cause the smart core to shift within the cavity. Depending on the shape of the smart core, the molten metal may deform as it flows into the cavity, potentially preventing the manufacture of the desired casting.

[0009] The present invention was made in view of this purpose, and its object is to provide a casting obtained by placing a pipe in a predetermined position, a mold for manufacturing the casting, a casting manufacturing apparatus, and a method for manufacturing the casting.

[0010] Methods for solving problems

[0011] The mold of the present invention comprises: a mold body having a fixed mold and a movable mold, the movable mold being able to move closer to or separate from the fixed mold; a molding space being divided at least by the fixed mold and the movable mold and capable of arranging a tube; an injection port being capable of injecting molten metal material into the molding space; a holding portion being for holding both ends of the tube; and a limiting member being for limiting the movement of the tube within the molding space when the molten metal material is injected into the molding space.

[0012] The mold of the present invention includes a limiting member that restricts the movement of a tube within the molding space when molten metal is injected into the molding space. According to this method, the tube can be held at a predetermined position within the molding space by the limiting member, thus enabling the manufacture of castings in which the tube is precisely positioned.

[0013] The casting manufacturing apparatus of the present invention comprises: A mold comprising a fixed mold, a movable mold, a molding space, an injection port, a retaining portion, and a limiting member, wherein the movable mold is capable of approaching or separating relative to the fixed mold; the molding space is divided at least by the fixed mold and the movable mold and is capable of housing a tube; the injection port is capable of injecting molten metal material into the molding space; the retaining portion holds both ends of the tube; and the limiting member restricts the movement of the tube within the molding space when the molten metal material is injected into the molding space. A metal material conveying device injects the molten metal material from the injection port into the forming space.

[0014] The mold of the casting manufacturing apparatus of the present invention includes a limiting member that restricts the movement of a tube within the molding space when molten metal is injected into the molding space. According to this method, when molten metal is injected into the molding space from the injection port by the metal material conveying device, the limiting member can keep the tube at a predetermined position within the molding space, thus enabling the manufacture of castings in which the tube is precisely positioned.

[0015] The manufacturing method of the present invention is a method for manufacturing a casting, the casting comprising a tube and a metal material for casting the tube, wherein the manufacturing method of the casting includes the following steps: a preparation step, wherein a mold is prepared, the mold comprising a fixed mold, a movable mold, a forming space, an injection port, a holding part, and a limiting member, the movable mold being able to move closer to or separate from the fixed mold, the forming space being divided at least by the fixed mold and the movable mold and capable of arranging the tube, the injection port being capable of injecting molten metal material into the forming space, the holding part holding both ends of the tube, and the limiting member... The process involves: a process of restricting the movement of the tube within the molding space when molten metal is injected into the molding space; a configuration process where the retaining part holds the tube in contact with the restricting member and positions the tube within the molding space; a mold closing process where the movable mold is brought close to the fixed mold to close the mold; a filling process where the molten metal is injected into the molding space from the injection port, thereby filling the molding space with the molten metal; and a demolding process where the movable mold is separated from the fixed mold to open the mold and remove the casting.

[0016] According to the manufacturing method of the present invention, in the placement step, the retaining part holds the tube in contact with the limiting member, and the tube is placed in the molding space. According to this method, in the filling step, when molten metal material is injected into the molding space from the injection port and the molding space is filled with molten metal material, the movement of the tube within the molding space is restricted by the limiting member. Therefore, the tube can be kept at a predetermined position in the molding space, and a casting with the tube precisely placed in the predetermined position can be manufactured.

[0017] The casting of the present invention comprises: a tube; and a metal material for casting the tube, the tube comprising: a first end; a second end; and a middle portion located between the first end and the second end, the first end and the second end protruding outward from the metal material, and a portion of the middle portion protruding outward from the metal material.

[0018] According to the casting of the present invention, a portion of the middle section of the tube is exposed to the outside from the metal material. This improves the heat dissipation of solvents and the like passing through the tube. Furthermore, the other portion of the middle section is not exposed to the outside from the metal material and is therefore protected by it. Thus, by exposing a portion of the middle section to the outside from the metal material, an optimal casting suitable for the intended use and operating environment can be provided.

[0019] Another casting of the present invention comprises: a tube; and a metal material for casting the tube, the tube having: a first end; a second end, arranged in a predetermined direction with the first end; and a middle portion located between the first end and the second end, the middle portion being formed in a spiral shape extending along the predetermined direction, and the metal material having an inner circumferential surface located radially inward of the middle portion and a recessed portion recessed from the inner circumferential surface toward the radial direction when viewed from the predetermined direction.

[0020] According to another casting of the present invention, when viewed from a predetermined direction, the metal material has an inner circumferential surface located radially inward than the central portion and a recessed portion extending radially outward from the inner circumferential surface. In this manner, the surface area of ​​the inner circumferential surface of the metal material is increased, and cooling performance is improved.

[0021] Invention Effects

[0022] According to the present invention, it is possible to provide a casting obtained by placing a pipe in a predetermined position, a mold for manufacturing the casting, a casting manufacturing apparatus, and a method for manufacturing the casting. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the casting manufacturing apparatus according to the first embodiment.

[0024] Figure 2It is a schematic 3D diagram representing a hollow tube.

[0025] Figure 3A It is a perspective view schematically representing the casting of the first embodiment.

[0026] Figure 3B This is a schematic side view of the casting according to the first embodiment.

[0027] Figure 4 This is a perspective view of the movable model of the first embodiment.

[0028] Figure 5 This is a perspective view showing the state in which the movable mold in the first embodiment is fitted with a hollow tube.

[0029] Figure 6 This is a perspective view showing the state in which the fixed mold of the first embodiment is equipped with a hollow tube.

[0030] Figure 7 This is a perspective view showing the state in which the core of the first embodiment is configured with a hollow tube.

[0031] Figure 8 This is a perspective view showing the state in which a sliding core is inserted into the middle part of the hollow tube in the first embodiment.

[0032] Figure 9 This is a perspective view of the sliding core according to the first embodiment.

[0033] Figure 10 It is a side view showing the positional relationship between the protruding components, protrusions, and hollow tubes when the hollow tube is arranged in the molding space.

[0034] Figure 11 It is a flowchart illustrating the manufacturing method of the casting.

[0035] Figure 12 This is a three-dimensional view of the sliding core of the modified example.

[0036] Figure 13 This is a side view showing a modified example of the positional relationship between the protruding member, the protrusion, and the hollow tube when the hollow tube is arranged in the molding space.

[0037] Figure 14 It is a three-dimensional drawing schematically representing a modified example of a casting.

[0038] Figure 15 This is a schematic diagram of the casting manufacturing apparatus according to the second embodiment.

[0039] Figure 16 This is a perspective view schematically representing the casting of the second embodiment.

[0040] Figure 17This is a perspective view of the movable mold according to the second embodiment.

[0041] Figure 18 This is a perspective view showing the state in which the movable mold in the second embodiment is fitted with a hollow tube.

[0042] Figure 19 This is a perspective view showing the state in which the fixed mold in the second embodiment is equipped with a hollow tube.

[0043] Figure 20 This is a perspective view showing the state in which the core of the second embodiment is configured with a hollow tube.

[0044] Figure 21 It is a side view showing the positional relationship between the grooves, protrusions, and hollow tubes when the hollow tube is arranged in the molding space.

[0045] Figure 22 This is a front view showing the positional relationship between the movable side protruding member and the hollow tube in the first modified example.

[0046] Figure 23 This is a top view showing the positional relationship between the movable side protruding member and the hollow tube in the second modified example.

[0047] Figure 24 This is a three-dimensional view of the movable mold of the first modified example.

[0048] Figure 25 This is a three-dimensional view of the movable mold of the second variation. Detailed Implementation

[0049] Hereinafter, embodiments of the casting manufacturing apparatus of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments described herein are not intended to specifically limit the present invention. Furthermore, components and parts that perform the same function will be labeled with the same reference numerals, and repeated descriptions will be omitted or simplified where appropriate.

[0050] <First Implementation Method>

[0051] Figure 1 This is a schematic diagram of the casting manufacturing apparatus 10 according to this embodiment. The casting manufacturing apparatus 10 is an apparatus that uses die casting, that is, a casting method under high speed and high pressure (so-called high pressure casting). Here, the high pressure is, for example, 20 MPa to 100 MPa. The casting manufacturing apparatus 10 manufactures a hollow tube 100 (see reference). Figure 2 ) and the metal material 120 for inserting the hollow tube 100 (refer to Figure 3A Casting 140 (refer to) Figure 3AThe casting manufacturing apparatus 10 includes a mold 20, a filling material conveying device 80, and a metal material conveying device 90. Here, the direction in which the movable mold 40 moves relative to the fixed mold 30 (described later) is designated as the first direction D1, the direction orthogonal to the first direction D1 when viewed from above is designated as the second direction D2, and the vertical direction is designated as the third direction D3. The second direction D2 is an example of a defined direction. However, the above directions are merely directions determined for ease of explanation and do not limit the arrangement of the mold 20 or the present invention in any way.

[0052] The hollow tube 100 is formed of a metal with high thermal conductivity (e.g., an aluminum alloy). The hollow tube 100 is an example of a tube. The cross-section of the hollow tube 100 is circular. However, the cross-section of the hollow tube 100 is not limited to a circle; for example, it can also be elliptical. Figure 2 As shown, the hollow tube 100 has a straight first end 102, a straight second end 106 parallel to the first end 102, and an intermediate portion 110 located between the first end 102 and the second end 106. The first end 102, the second end 106, and the intermediate portion 110 are integrally formed. The first end 102 has an inlet 103 for injecting an incompressible fluid. The second end 106 has an outlet 107 for discharging an incompressible fluid. The first end 102 and the second end 106 have the same length from the intermediate portion 110, but they may also be different. The first end 102 and the second end 106 are arranged in a second direction D2. The first end 102 and the second end 106 extend from the intermediate portion 110 in the same direction. That is, the inlet 103 and the outlet 107 open in the same direction. Alternatively, the inlet 103 and the outlet 107 may open in different directions. The intermediate portion 110 is formed in a spiral shape extending along the second direction D2. The middle portion 110 has multiple curved portions 112 that are bent into an arc shape. The curved portions 112 are arranged in the second direction D2. When the hollow tube 100 is embedded in the metal material 120, the curved portions 112 are covered by the metal material 120 and do not expose to the outside. Figure 5 As shown, the intermediate portion 110 has a plurality of locking portions 113 arranged in the second direction D2. The locking portions 113 are part of the curved portion 112. Furthermore, the shape of the intermediate portion 110 is not limited to a spiral shape.

[0053] like Figure 3AAs shown, casting 140 includes a hollow tube 100 and a metal material 120 for inlaying the hollow tube 100. The hollow tube 100 is integral with the metal material 120. A portion of the first end 102, a portion of the second end 106, and the entirety of the intermediate portion 110 (i.e., the entirety of the bend 112) of the hollow tube 100 are covered by the metal material 120. A portion of the first end 102, including the inlet 103, and a portion of the second end 106, including the outlet 107, are exposed to the outside from the metal material 120. The metal material 120 is, for example, the same metal as the hollow tube 100. Alternatively, the metal material 120 and the hollow tube 100 may be different metals. Figure 3A and Figure 3B As shown, when viewed from the second direction D2, the metal material 120 has an inner peripheral surface 122 located radially inward of the intermediate portion 110, an outer peripheral surface 123 located radially outward of the intermediate portion 110, and a recess 124 recessed radially outward from the inner peripheral surface 122. The recess 124 extends along the second direction D2. The end of the recess 124 in the inner peripheral surface 122 in the second direction D2 opens towards the second direction D2. Furthermore, the recess 124 may also open towards the second direction D2 at the other end of the inner peripheral surface 122 in the same way. The recesses 124 are provided at equal intervals in the circumferential direction of the inner peripheral surface 122. Here, the metal material 120 has three recesses 124, but the number of recesses 124 is not limited to three. Furthermore, a portion of the intermediate portion 110 may also be exposed to the outside in the recess 124. The casting 140 can be used, for example, as a housing for a drive motor.

[0054] like Figure 1 As shown, mold 20 includes mold body 25. Mold body 25 includes fixed mold 30, movable mold 40 capable of approaching or separating relative to fixed mold 30, core 50 at least partially located between fixed mold 30 and movable mold 40, and sliding core 150 at least partially located between fixed mold 30 and movable mold 40. A cavity portion 31 for forming a portion of casting 140 is formed in fixed mold 30 (see reference). Figure 6 A core 41 for forming a part of the casting 140 is formed in the movable mold 40 (see reference). Figure 4 The core 50 is a component that slides in the third direction D3. The sliding core 150 is a component that slides in the second direction D2. The sliding core 150 is formed in a cylindrical shape (including a hollow cylinder and a solid cylinder). The sliding core 150 extends along the second direction D2. The sliding core 150 is inserted into the middle portion 110 (inside the spiral portion) of the hollow tube 100.

[0055] like Figure 1 As shown, the mold 20 has a molding space 60 capable of arranging the hollow tube 100 (see also...). Figure 10 The forming space 60 is the space where the hollow tube 100 is arranged. The forming space 60 is the space where molten metal material (molten metal) is injected. The forming space 60 is the space for forming the casting 140. When the movable mold 40, the core 50, and the sliding core 150 are brought close to the fixed mold 30 to close the mold 20, the forming space 60 is formed by the movable mold 40, the fixed mold 30, the core 50, and the sliding core 150 (see also...). Figure 10 The molding space 60 is divided by a fixed mold 30, a movable mold 40, a core 50, and a sliding core 150. Alternatively, if the mold body 25 does not have a core 50 and a sliding core 150, the molding space 60 is divided by the fixed mold 30 and the movable mold 40.

[0056] The mold 20 has a holding portion 42 for holding both ends (i.e., the first end 102 and the second end 106) of the hollow tube 100 (see reference). Figure 4 ).like Figure 5 As shown, the movable mold 40 has a first holding portion 42A for holding the first end portion 102 of the hollow tube 100 (see also...). Figure 4 ) and the second retaining part 42B of the second end 106 of the hollow tube 100 (also refer to Figure 4 The first retaining portion 42A and the second retaining portion 42B are through holes formed in the movable mold 40. The first retaining portion 42A and the second retaining portion 42B connect the inner surface 40A and the outer surface 40B of the movable mold 40 (see reference). Figure 1 The hollow tube 100 is connected to the molding space 60. When the hollow tube 100 is positioned in the molding space 60 (i.e., when the hollow tube 100 is installed in the movable mold 40), the first end 102 is inserted into the first holding portion 42A, and the second end 106 is inserted into the second holding portion 42B. Thus, the hollow tube 100 is held in the movable mold 40. With the first end 102 inserted into the first holding portion 42A, the injection port 103 is exposed to the outside of the movable mold 40 (see reference). Figure 1 With the second end 106 inserted into the second retaining part 42B, the discharge port 107 is exposed to the outside of the movable mold 40 (see reference). Figure 1 In addition, such as Figure 10 As shown, in this embodiment, the first holding portion 42A and the second holding portion 42B are provided on the movable mold 40, but they can also be provided on the fixed mold 30. Furthermore, when the hollow tube 100 is disposed in the molding space 60 (i.e., the hollow tube is installed in the movable mold 40), the middle portion 110 of the hollow tube 100 does not contact the inner surface 40A of the movable mold 40, the inner surface 30A of the fixed mold 30, and the inner surface 50A of the core 50.

[0057] The mold 20 includes a plurality of protruding members 70 that restrict the movement of the hollow tube 100 within the molding space 60 when molten metal is injected into the molding space 60. The protruding members 70 are configured to restrict the movement of the middle portion 110 of the hollow tube 100 in the second direction D2. The protruding members 70 are also configured to restrict the movement of the middle portion 110 of the hollow tube 100 in a direction intersecting the second direction D2 (e.g., a direction orthogonal to the second direction D2, such as the radial direction of the middle portion 110) (e.g., radially outward movement). The protruding members 70 protrude from the inner surface of the mold body 25 toward the molding space 60. The protruding members 70 are an example of restricting members. Figure 10 As shown, the protruding member 70 includes a fixed mold side protruding member 71 disposed on the fixed mold 30, a movable mold side protruding member 72 disposed on the movable mold 40, and a core side protruding member 73 disposed on the core 50.

[0058] like Figure 4 As shown, a movable mold side protrusion member 72 is provided on the movable mold 40. The movable mold side protrusion member 72 is integrally formed with the movable mold 40. Alternatively, the movable mold side protrusion member 72 can also be formed separately from the movable mold 40. That is, the movable mold side protrusion member 72 can also be provided in a detachable manner on the mold body 25 (here, the movable mold 40). The movable mold side protrusion member 72 protrudes from the inner surface 40A of the movable mold 40 toward the molding space 60. The movable mold side protrusion member 72 protrudes from the inner surface 40A of the movable mold 40 toward the fixed mold 30. The movable mold side protrusion member 72 extends along a first direction D1. The movable mold side protrusion member 72 is located below the first holding portion 42A and the second holding portion 42B. Furthermore, the movable mold side protrusion member 72 can also be located above the first holding portion 42A and the second holding portion 42B. The movable mold side protrusion members 72 are arranged in a straight line along a second direction D2. The spacing between adjacent movable mold-side protruding members 72 in the second direction D2 is the same as the spacing between adjacent curved portions 112 of the hollow tube 100 in the second direction D2. For example... Figure 5As shown, the plurality of movable mold-side protruding members 72 are configured such that when the hollow tube 100 is placed in the molding space 60 (i.e., when the hollow tube 100 is installed in the movable mold 40), they are respectively located between adjacent locking portions 113. The movable mold-side protruding members 72 are configured to contact the hollow tube 100 (more specifically, the locking portion 113). In this embodiment, five movable mold-side protruding members 72 are provided in the movable mold 40, but the number of movable mold-side protruding members 72 is not limited to five. The amount of protrusion (length in the first direction D1) of the plurality of movable mold-side protruding members 72 from the inner surface 40A of the movable mold 40 is the same as that of each other. In addition, the amount of protrusion of the plurality of movable mold-side protruding members 72 from the inner surface 40A of the movable mold 40 may also be different from each other. For example, the amount by which a portion of the movable mold-side protruding members 72 protrudes from the inner surface 40A of the movable mold 40 may differ from the amount by which another portion of the movable mold-side protruding members 72 protrudes from the inner surface 40A of the movable mold 40. Figure 4 As shown, the movable mold-side protruding member 72 has: a cylindrical main body portion 72A extending from the inner surface 40A of the movable mold 40 along a first direction D1; and a tapered portion 72B extending from the end of the main body portion 72A along the first direction D1, with its diameter decreasing towards the end. That is, the tapered portion 72B is formed to taper towards the end. Furthermore, the movable mold-side protruding member 72 may have only the main body portion 72A or only the tapered portion 72B. In adjacent movable mold-side protruding members 72, the spacing at the end sides is wider than the spacing at the root sides. Furthermore, in adjacent movable mold-side protruding members 72, the spacing at the end sides and the spacing at the root sides may also be the same.

[0059] like Figure 6As shown, a fixed mold side protrusion 71 is provided on the fixed mold 30. The fixed mold side protrusion 71 is integrally formed with the fixed mold 30. Alternatively, the fixed mold side protrusion 71 can be formed separately from the fixed mold 30. That is, the fixed mold side protrusion 71 can also be provided on the mold body 25 (here, the fixed mold 30) in a detachable manner. The fixed mold side protrusion 71 protrudes from the inner surface 30A of the fixed mold 30 toward the molding space 60. Furthermore, the inner surface 30A is opposite to the inner surface 40A of the movable mold 40. The fixed mold side protrusion 71 protrudes from the inner surface 30A of the fixed mold 30 toward the movable mold 40. The fixed mold side protrusion 71 extends along a first direction D1. The fixed mold side protrusion 71 is arranged in a straight line along a second direction D2. The spacing between adjacent fixed mold side protrusions 71 in the second direction D2 is the same as the spacing between adjacent bends 112 of the hollow tube 100 in the second direction D2. Multiple mold-side protruding members 71 are configured to be located between adjacent locking portions 113 when the hollow tube 100 is positioned in the molding space 60 (i.e., when the mold 20 is closed). The mold-side protruding members 71 are configured to contact the hollow tube 100 (more specifically, the locking portion 113). In this embodiment, five mold-side protruding members 71 are provided in the fixed mold 30, but the number of mold-side protruding members 71 is not limited to five. The amount of protrusion (length in the first direction D1) of the multiple mold-side protruding members 71 from the inner surface 30A of the fixed mold 30 is the same for each other. Alternatively, the amount of protrusion from the inner surface 30A of the fixed mold 30 may also be different for each other. For example, the amount of protrusion from the inner surface 30A of the fixed mold 30 by a portion of the multiple fixed mold side protrusion members 71 may differ from the amount of protrusion from the inner surface 30A of the fixed mold 30 by another portion of the multiple fixed mold side protrusion members 71. The fixed mold side protrusion member 71 has: a cylindrical main body portion 71A extending from the inner surface 30A of the fixed mold 30 along a first direction D1; and a tapered portion 71B extending from the end of the main body portion 71A along the first direction D1, with its diameter decreasing towards the end. That is, the tapered portion 71B is formed to taper towards the end. Furthermore, the fixed mold side protrusion member 71 may have only the main body portion 71A or only the tapered portion 71B. In adjacent fixed mold side protrusion members 71, the spacing at the end sides is wider than the spacing at the root sides. Moreover, in adjacent fixed mold side protrusion members 71, the spacing at the end sides and the spacing at the root sides may also be the same.

[0060] like Figure 7As shown, a core-side protruding member 73 is provided on the core 50. The core-side protruding member 73 is integrally formed with the core 50. Alternatively, the core-side protruding member 73 can be formed separately from the core 50. That is, the core-side protruding member 73 can also be provided in a detachable manner on the mold body 25 (here, the core 50). The core-side protruding member 73 protrudes from the inner surface 50A of the core 50 toward the molding space 60. Furthermore, the inner surface 50A is orthogonal to the inner surface 40A of the movable mold 40 and the inner surface 30A of the fixed mold 30. The core-side protruding member 73 protrudes downward from the inner surface 50A of the core 50. The core-side protruding member 73 extends along a third direction D3. The core-side protruding members 73 are arranged in a straight line along a second direction D2. The spacing between adjacent core-side protruding members 73 in the second direction D2 is the same as the spacing between adjacent bends 112 of the hollow tube 100 in the second direction D2. Multiple core-side protruding members 73 are configured to be located between adjacent locking portions 113 when the hollow tube 100 is positioned in the molding space 60 (i.e., when the mold 20 is closed). The core-side protruding members 73 are configured to contact the hollow tube 100 (more specifically, the locking portion 113) when the hollow tube 100 is positioned in the molding space 60 (i.e., when the mold 20 is closed). In this embodiment, six core-side protruding members 73 are provided in the core 50, but the number of core-side protruding members 73 is not limited to six. The amount of protrusion (the length of the third direction D3) of the multiple core-side protruding members 73 from the inner surface 50A of the core 50 is the same for each other. Alternatively, the amount of protrusion of the multiple core-side protruding members 73 from the inner surface 50A of the core 50 may also be different for each other. For example, the amount of protrusion from the inner surface 50A of the core 50 of a portion of the multiple core-side protruding members 73 may differ from the amount of protrusion from the inner surface 50A of the core 50 of another portion of the multiple core-side protruding members 73. The core-side protruding member 73 has: a cylindrical main body portion 73A extending from the inner surface 50A of the core 50 along a third direction D3; and a tapered portion 73B extending from the end of the main body portion 73A along a third direction D3, with its diameter decreasing towards the end. That is, the tapered portion 73B is formed to taper towards the end. Furthermore, the core-side protruding member 73 may have only the main body portion 73A or only the tapered portion 73B. In adjacent core-side protruding members 73, the spacing at the end sides is wider than the spacing at the root sides. Furthermore, in adjacent core-side protruding members 73, the spacing at the end sides and the spacing at the root sides may also be the same.

[0061] like Figure 1As shown, the mold 20 has a plurality of protrusions 152 that restrict the movement of the hollow tube 100 within the molding space 60 when molten metal is injected into the molding space 60. The protrusions 152 are configured to restrict the movement of the middle portion 110 of the hollow tube 100 in a direction intersecting the second direction D2 (e.g., a direction orthogonal to the second direction D2, such as the radial direction of the middle portion 110) (e.g., radially inward). The protrusions 152 are configured to contact the middle portion 110. During the insertion of the sliding core 150 into the middle portion 110 of the hollow tube 100, a gap is formed between the outer diameter end of the protrusion 152 and the inner circumferential surface of the middle portion 110, allowing the sliding core 150 to be inserted. Furthermore, when the insertion of the sliding core 150 into the middle portion 110 is complete, the outer diameter end of the protrusion 152 contacts the inner circumferential surface of the middle portion 110. Furthermore, even after the sliding core 150 has been fully inserted into the inner side of the intermediate portion 110, the outer diameter end of the protrusion 152 may not contact the inner circumferential surface of the intermediate portion 110. That is, even after the sliding core 150 has been fully inserted into the inner side of the intermediate portion 110, a small gap may be formed between the outer diameter end of the protrusion 152 and the inner circumferential surface of the intermediate portion 110. This gap is preferably configured such that, when the intermediate portion 110 moves radially, it prevents the outer diameter end of the protrusion 152 from contacting the inner circumferential surface of the intermediate portion 110 and thus prevents it from moving radially inward. Figure 9 As shown, protrusions 152 are formed on the outer peripheral surface 150S of the sliding core 150. The protrusions 152 extend along the second direction D2. The protrusions 152 are formed separately from each other in the circumferential direction of the outer peripheral surface 150S. The protrusions 152 are provided at equal intervals in the circumferential direction of the outer peripheral surface 150S. Here, the sliding core 150 has three protrusions 152, but the number of protrusions 152 is not limited to three. Figure 8 and Figure 10 As shown, the protrusion 152 protrudes toward the central portion 110. The protrusion 152 is an example of a limiting member.

[0062] like Figure 10As shown, with the hollow tube 100 positioned in the molding space 60, the movable mold-side protrusion 72, the fixed mold-side protrusion 71, and the core-side protrusion 73 are located between adjacent locked portions 113 of the hollow tube 100, thus restricting the movement of the hollow tube 100 (particularly the radially outward movement of the middle portion 110 and its movement in the second direction D2). Furthermore, with the hollow tube 100 positioned in the molding space 60, the protrusion 152 is located radially inward than the middle portion 110, thus restricting the radially inward movement of the middle portion 110. With the hollow tube 100 positioned in the molding space 60, the movable mold-side protrusion 72, the fixed mold-side protrusion 71, the core-side protrusion 73, and the protrusion 152 can hold the middle portion 110 of the hollow tube 100 in a predetermined position. In this embodiment, the core-side protruding member 73 is located above the center of the third direction D3 of the hollow tube 100 and at the center of the first direction D1 of the hollow tube 100. The movable mold-side protruding member 72 is located below the center of the third direction D3 of the hollow tube 100 and closer to the first end 102 than the center of the first direction D1 of the hollow tube 100. The fixed mold-side protruding member 71 is located below the center of the third direction D3 of the hollow tube 100 and on the side opposite to the first end 102 than the center of the first direction D1 of the hollow tube 110. Furthermore, when viewed from the centerline 110C of the hollow tube 110, the ends of the movable mold-side protruding member 72, the fixed mold-side protruding member 71, and the core-side protruding member 73 are located closer to the centerline 110C of the hollow tube 110 than the centerline 100C along the spiral direction of the hollow tube 100. Therefore, by means of the protruding member 70, the movement of the hollow tube 100 within the molding space 60 can be reliably restricted, and the hollow tube 100 can be more reliably positioned at a predetermined location within the molding space 60. Furthermore, when viewed from the centerline 110C of the intermediate portion 110, at least a portion of the ends of the movable mold-side protruding member 72 and the fixed mold-side protruding member 71 are located closer to the centerline 110C of the intermediate portion 110 than the inner diameter periphery 100I of the hollow tube 100. Therefore, by means of the protruding member 70, the movement of the hollow tube 100 within the molding space 60 can be further restricted reliably, and the hollow tube 100 can be more reliably positioned at a predetermined location within the molding space 60. Moreover, it is not necessary for all the ends of the movable mold-side protruding member 72, the fixed mold-side protruding member 71, and the core-side protruding member 73 to be in the aforementioned relationship; at least a portion is sufficient. Furthermore, with the sliding core 150 inserted into the intermediate portion 110, at least a portion of the protrusion 152 is configured to face the second outlet 62 and the third outlet 63. Here, for example, the protrusion 152A is configured to face the second outlet 62 and the third outlet 63.With the sliding core 150 inserted into the intermediate portion 110, when viewed from the second direction D2, the protrusion 152 is located between the protruding members 70 in the circumferential direction of the intermediate portion 110. For example, the protrusion 152A is located between the fixed mold-side protruding member 71 and the movable mold-side protruding member 72 in the circumferential direction of the intermediate portion 110. The fixed mold-side protruding member 71 is an example of a first protruding member, and the movable mold-side protruding member 72 is an example of a second protruding member. Furthermore, with the sliding core 150 inserted into the intermediate portion 110, the protrusion 152 can contact the intermediate portion 110, but the outer peripheral surface 150S of the sliding core 150 does not contact the intermediate portion 110.

[0063] The mold 20 has an injection port 65 (see reference) for injecting molten metal material into the molding space 60. Figure 4 and Figure 6 When the movable mold 40 is brought close to the fixed mold 30 to close the mold 20, the injection port 65 is formed by the movable mold 40 and the fixed mold 30. That is, the injection port 65 is located at the boundary between the movable mold 40 and the fixed mold 30. The injection port 65 is formed by the movable mold side injection port 65A formed in the movable mold 40 (see reference). Figure 4 ) and the fixed mold side injection port 65B formed in the fixed mold 30 (refer to Figure 6 The movable mold side injection port 65A is formed in the movable mold 40, and makes surface contact with the contact surface 30C of the fixed mold 30. The fixed mold side injection port 65B is formed in the fixed mold 30, and makes surface contact with the contact surface 40C of the movable mold 40. The injection port 65 opens downwards.

[0064] The mold 20 has a flow path 68 that connects the injection port 65 to the molding space 60 (see reference). Figure 4 and Figure 6 When the movable mold 40 is brought close to the fixed mold 30 to close the mold 20, the flow path 68 is formed by the movable mold 40 and the fixed mold 30. That is, the flow path 68 is located at the boundary between the movable mold 40 and the fixed mold 30. The flow path 68 is formed by the movable mold side flow path 68A formed in the movable mold 40 (see...). Figure 4 ) and the fixed mold side flow path 68B formed in the fixed mold 30 (refer to Figure 6 (Divide). For example Figure 4 As shown, the flow path 68 includes a first outlet 61, a second outlet 62, and a third outlet 63 that discharge molten metal material toward the molding space 60. The first outlet 61, second outlet 62, and third outlet 63 communicate with the injection port 65. The first outlet 61 is located above the movable mold-side protruding member 72. The second outlet 62 and third outlet 63 are located below the movable mold-side protruding member 72. The first outlet 61 is formed by the movable mold-side first outlet 61A (refer to...) on the movable mold 40. Figure 4 ) and the first outlet 61B formed on the fixed mold side of the fixed mold 30 (refer to Figure 6 The second outlet 62 is divided by the second outlet 62A formed on the movable mold side of the movable mold 40 (refer to...). Figure 4 ) and the second outlet 62B formed on the fixed mold side of the fixed mold 30 (refer to Figure 6 The third row outlet 63 is divided by the third row outlet 63A formed on the movable mold side of the movable mold 40 (refer to...). Figure 4 ) and the third outlet 63B formed on the fixed mold side of the fixed mold 30 (refer to Figure 6 The movable mold side flow path 68A, the movable mold side first outlet 61A, the movable mold side second outlet 62A, and the movable mold side third outlet 63A are formed on the contact surface 40C of the movable mold 40. The fixed mold side flow path 68B, the fixed mold side first outlet 61B, the fixed mold side second outlet 62B, and the fixed mold side third outlet 63B are formed on the contact surface 30C of the fixed mold 30.

[0065] like Figure 1 As shown, the filler delivery device 80 is a separate device from the mold 20. The filler delivery device 80 is a device for injecting an incompressible fluid into the injection port 103 of the hollow tube 100. The filler delivery device 80 is also a device for recovering the incompressible fluid by discharging it from the outlet 107 of the hollow tube 100. The incompressible fluid is not particularly limited as long as it is a fluid that, when filled inside the hollow tube 100, suppresses deformation of the hollow tube 100 even when a load is applied to it. Examples of incompressible fluids include oil (e.g., working oil). The filler delivery device 80 is installed in the molding space 60 of the mold 20 (see reference 60). Figure 1 The hollow tube 100 is configured with an inlet 103 and an outlet 107. The filler delivery device 80 includes a delivery section 82 for discharging incompressible fluid and a recovery section 84 for recovering incompressible fluid. The delivery section 82 and the recovery section 84 are, for example, flexible hoses with pressure resistance and heat resistance. The delivery section 82 is installed at the first end 102 of the hollow tube 100. The delivery section 82 communicates with the inlet 103 of the first end 102. The recovery section 84 is installed at the second end 106 of the hollow tube 100. The recovery section 84 communicates with the outlet 107 of the second end 106. Furthermore, the method of installing the delivery section 82 at the first end 102 and the method of installing the recovery section 84 at the second end 106 are not particularly limited. For example, they can be installed and removed using a connector (quick connector) or the like. In addition, the filler delivery device 80 can also fill the hollow tube 100 with solid materials such as sand instead of incompressible fluid.

[0066] like Figure 1As shown, the metal material delivery device 90 is a separate device from the mold 20. The metal material delivery device 90 is a device that injects molten metal material (molten liquid) from the injection port 65 of the mold 20 into the molding space 60. The metal material delivery device 90 is, for example, an injection device capable of applying a specified pressure to the molten liquid and injecting the molten liquid at a specified injection speed.

[0067] Next, the manufacturing method of casting 140 will be explained. Figure 11 This is a flowchart illustrating the manufacturing method of casting 140 (hereinafter referred to as the manufacturing method). For example... Figure 11 As shown, the manufacturing method includes a preparation step (step S10), a configuration step (step S20), a mold closing step (step S30), a fluid filling step (step S40), a filling step (step S50), a discharge step (step S60), and a demolding step (step S70). Here, as... Figure 1 As shown, casting 140 is manufactured using a casting manufacturing apparatus 10 equipped with a mold 20, a filling material conveying device 80, and a metal material conveying device 90 (see reference). Figure 3A ).

[0068] First, in the preparation process (step S10), such as Figure 1 As shown, a mold 20 is prepared. More specifically, the mold 20 includes: a fixed mold 30; a movable mold 40 capable of approaching or separating relative to the fixed mold 30; a core 50; a sliding core 150; a molding space 60 divided by the fixed mold 30, the movable mold 40, the core 50, and the sliding core 150 and capable of arranging the hollow tube 100; an injection port 65 capable of injecting molten metal material into the molding space 60; a first holding portion 42A and a second holding portion 42B respectively holding a first end 102 and a second end 106 of the hollow tube 100; and a protruding member 70 restricting the movement of the hollow tube 100 within the molding space 60 when molten metal material is injected into the molding space 60.

[0069] Next, in the configuration process (step S20), the hollow tube 100 is configured in the molding space 60. More specifically, the hollow tube 100 is in contact with the protruding member 70 (here, the locking part 113 of the hollow tube 100 is in contact with the movable mold side protruding member 72), the first holding part 42A of the movable mold 40 holds the first end 102 of the hollow tube 100, and the second holding part 42B of the movable mold 40 holds the second end 106, thereby installing the hollow tube 100 onto the movable mold 40.

[0070] Next, in the mold closing process (step S30), the movable mold 40, core 50, and sliding core 150 are brought close to the fixed mold 30 to close the mold 20. Thus, the forming space 60 of the molded casting 140 is divided by the cavity portion 31 of the fixed mold 30, the core portion 41 of the movable mold 40, the core 50, and the sliding core 150. With the mold 20 closed, the middle portion 110 of the hollow tube 100 contacts the movable mold-side protruding member 72, the fixed mold-side protruding member 71, and the core-side protruding member 73, thus restricting the movement of the middle portion 110. Furthermore, since the sliding core 150 is inserted into the middle portion 110, the radially inward movement of the middle portion 110 is restricted by the protrusion 152 of the sliding core 150.

[0071] Next, in the fluid filling process (step S40), an incompressible fluid (e.g., oil) is injected through the injection port 103 of the first end 102, filling the hollow tube 100 with the incompressible fluid. More specifically, the conveying part 82 of the filler conveying device 80 is installed to the first end 102 of the hollow tube 100 via a quick connector or the like, and the recovery part 84 of the filler conveying device 80 is installed to the second end 106 of the hollow tube 100 via a quick connector or the like. Then, the incompressible fluid is filled into the hollow tube 100 from the filler conveying device 80 through the injection port 103. After the filling of the incompressible fluid into the hollow tube 100 is completed, the filler conveying device 80 can be removed from the hollow tube 100, or it can remain installed. In this embodiment, the fluid filling process (step S40) is performed after the mold closing process (step S30), but the mold closing process (step S30) can also be performed after the fluid filling process (step S40).

[0072] Next, in the filling process (step S50), molten metal material is injected from the injection port 65 of the mold 20 into the forming space 60 formed by the movable mold 40, the fixed mold 30, the core 50, and the sliding core 150, thereby filling the forming space 60 with molten metal material. For example, aluminum alloy can be used as a metal material. Then, the molten metal material (molten liquid) is cooled and solidified within the mold 20. Here, cooling in this specification refers to cooling used to solidify the molten liquid.

[0073] Next, in the discharge process (step S60), the incompressible fluid filling the hollow tube 100 is discharged from the discharge port 107 of the second end 106 of the casting 140. More specifically, the incompressible fluid is discharged from the discharge port 107 of the second end 106 of the hollow tube 100 toward the filler conveying device 80 by driving the filler conveying device 80. The incompressible fluid discharged from the discharge port 107 is recycled back to the filler conveying device 80. Then, after the incompressible fluid is discharged from the hollow tube 100, the filler conveying device 80 is removed from the hollow tube 100. The discharge process (step S60) is performed with the casting 140 disposed in the mold 20. Furthermore, the discharge process (step S60) can be performed after the molten metal in the mold 20 has completely solidified, or it can be performed midway through the solidification process. That is, the discharge of incompressible fluid can begin after the curing time (the time required for cooling to solidify the melt) has elapsed, or it can begin before the curing time has elapsed.

[0074] Next, in the demolding process (step S70), the movable mold 40, core 50, and sliding core 150 are separated from the fixed mold 30 to open the mold 20. At this time, the formed casting 140 is fixed to the movable mold 40. Then, a core pin (not shown) is pressed against the casting 140 fixed to the movable mold 40, and the casting 140 after the incompressible fluid discharged from the hollow tube 100 is removed from the movable mold 40. In this way, a casting 140 having a hollow tube 100 and a metal material 120 for inserting the hollow tube 100 is formed.

[0075] As described above, the mold 20 of this embodiment includes a protruding member 70 that restricts the movement of the hollow tube 100 within the molding space 60 when molten metal material is injected into the molding space 60. According to this method, the hollow tube 100 can be held in a predetermined position within the molding space 60 by means of the protruding member 70, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined location.

[0076] In the mold 20 of this embodiment, the protruding member 70 may also be integrally formed with the mold body 25. According to the above method, the protruding member 70 will not be offset relative to the mold body 25, so it is possible to manufacture a casting 140 in which the hollow tube 100 is precisely positioned in a specified position.

[0077] In the mold 20 of this embodiment, the protruding member 70 protrudes from the inner surface of the mold body 25 toward the molding space 60. According to the above method, by bringing the protruding member 70 into contact with the hollow tube 100, the movement of the hollow tube 100 can be easily restricted.

[0078] In the mold 20 of this embodiment, the plurality of protruding members 70 may be arranged such that when the hollow tube 100 is disposed in the molding space 60, they are respectively located between adjacent locking portions 113. According to the above method, the movement of the locking portions 113 in a predetermined direction (here, the second direction D2) can be more reliably restricted, and therefore it is possible to manufacture a casting 140 in which the hollow tube 100 is precisely disposed in a predetermined position.

[0079] In the mold 20 of this embodiment, the protrusions of the plurality of protruding members 70 from the inner surface of the mold body 25 (e.g., the inner surface 40A of the movable mold 40) may be the same. According to the above method, the protruding members 70 can be easily formed.

[0080] In the mold 20 of this embodiment, the amount of protrusion of a portion of the protruding members 70 from the inner surface of the mold body 25 (e.g., the inner surface 40A of the movable mold 40) may differ from the amount of protrusion of another portion of the protruding members 70 from the inner surface of the mold body 25 (e.g., the inner surface 40A of the movable mold 40). According to the above method, various protruding members 70 can be used to fit the shape of the hollow tube 100.

[0081] In the mold 20 of this embodiment, the spacing between the ends of adjacent protruding members 70 may be wider than the spacing between the roots. According to the above method, when the hollow tube 100 is arranged in the molding space 60, the locking portion 113 of the hollow tube 100 can be easily arranged between adjacent protruding members 70.

[0082] In the mold 20 of this embodiment, a portion of the plurality of protruding members 70 may be disposed on a first inner surface (e.g., the inner surface 30A of the fixed mold 30), and another portion of the plurality of protruding members 70 may be disposed on a second inner surface (e.g., the inner surface 40A of the movable mold 40). According to the above method, even if the flow of the molten metal material injected into the molding space 60 becomes complicated, the hollow tube 100 is restricted from moving from different angles by the protruding members 70, thus the movement of the hollow tube 100 can be more reliably restricted.

[0083] In the mold 20 of this embodiment, a portion of the plurality of protruding members 70 may be disposed on the inner surface 30A of the fixed mold 30, and another portion of the plurality of protruding members 70 may be disposed on the inner surface 40A of the movable mold 40. According to the above method, for example, by simply mounting the hollow tube 100 to the movable mold 40, the movement of the hollow tube 100 can be restricted by the protruding members 70 of the movable mold 40 and the fixed mold 30.

[0084] In the mold 20 of this embodiment, a portion of a plurality of protruding members 70 may be provided on the inner surface 50A of the core 50. According to the above method, for example, by simply mounting the hollow tube 100 to the movable mold 40, the movement of the hollow tube 100 can be more reliably restricted by the protruding members 70 of the movable mold 40, the fixed mold 30, and the core 50.

[0085] In the mold 20 of this embodiment, the protruding member 70 may also be detachably provided on the mold body 25. According to the above method, the shape of the protruding member 70 can be easily changed according to the shape of the hollow tube 100. Furthermore, since the protruding member 70 is a different component from the mold body 25, the mold body 25 is easily formed. And, in the event of damage to the protruding member 70, it can be easily replaced.

[0086] In the mold 20 of this embodiment, the protruding member 70 is configured to restrict the movement of the middle portion 110 of the hollow tube 100 in the second direction D2. According to the above method, the position of the middle portion 110 of the hollow tube 100 can be maintained in the second direction D2, so it is possible to manufacture a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined position.

[0087] In the mold 20 of this embodiment, the middle portion 110 is formed in a spiral shape extending along the second direction D2. According to the above method, although the spiral-shaped middle portion 110 is easy to move in the second direction D2 when the molten metal material flows into the molding space 60, since the movement of the middle portion 110 in the second direction D2 is restricted by the protruding member 70, it is possible to manufacture a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined position.

[0088] In the mold 20 of this embodiment, the protruding member 70 protrudes from the inner surface of the mold body 25 toward the hollow tube 100, and at least the end portion (e.g., the tapered portion 71B) of the protruding member 70 is formed to taper in diameter toward the end. According to this method, the position of the middle portion 110 of the hollow tube 100 can be maintained more reliably, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined location. Furthermore, it is easier to position the middle portion 110 of the hollow tube 100 between the protruding members 70 arranged in the second direction D2, improving the workability of mounting the hollow tube 100 onto the mold 20.

[0089] In the mold 20 of this embodiment, the protruding member 70 and the protrusion 152 are configured to restrict the movement of the intermediate portion 110 in a direction intersecting the second direction D2. According to this configuration, the position of the intermediate portion 110 of the hollow tube 100 can be maintained radially, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned at a predetermined location. Furthermore, the protruding member 70 and the protrusion 152 are configured to restrict the movement of the intermediate portion 110 in a direction orthogonal to the second direction D2.

[0090] In the mold 20 of this embodiment, a protrusion 152 is formed on the outer peripheral surface 150S of the sliding core 150 and protrudes toward the middle portion 110. According to the above method, even if the middle portion 110 of the hollow tube 100 is to be moved radially inward, the position of the middle portion 110 can be maintained radially by the protrusion 152 protruding toward the middle portion 110. Therefore, it is possible to manufacture a casting 140 in which the hollow tube 100 is positioned with high precision in a predetermined position.

[0091] In the mold 20 of this embodiment, the protrusion 152 extends along the second direction D2. According to the above method, the position of the middle portion 110 can be maintained within a larger range in the second direction D2, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined location.

[0092] In the mold 20 of this embodiment, with the sliding core 150 inserted into the intermediate portion 110, at least a portion of the protrusion 152 is configured to face the second outlet 62 and the third outlet 63. According to this method, due to the force of the molten metal material flowing into the molding space 60 via the second outlet 62 and the third outlet 63, the intermediate portion 110 can easily move radially. However, the protrusion 152 restricts the radial movement of the intermediate portion 110, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned according to a predetermined location.

[0093] In the mold 20 of this embodiment, the sliding core 150 is formed in a cylindrical shape, and a plurality of protrusions 152 that are separated from each other in the circumferential direction are formed on the outer peripheral surface 150S of the sliding core 150. According to the above method, the position of the middle part 110 can be maintained over a larger range in the circumferential direction, and thus it is possible to manufacture a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined position.

[0094] In the mold 20 of this embodiment, with the sliding core 150 inserted into the intermediate portion 110, when viewed from the second direction D2, the protrusion 152A is located between the fixed mold-side protrusion 71 and the movable mold-side protrusion 72 in the circumferential direction of the intermediate portion 110. According to this method, the position of the intermediate portion 110 can be maintained over a larger range in the circumferential direction by means of the protrusion 152A, the fixed mold-side protrusion 71, and the movable mold-side protrusion 72, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned in a predetermined location.

[0095] Furthermore, according to the manufacturing method of this embodiment, in the placement step (step S20), the holding part 42 holds the hollow tube 100 in contact with the protruding member 70, and the hollow tube 100 is placed in the molding space 60. According to the above method, in the filling step (step S50), when molten metal material is injected into the molding space 60 from the injection port 65 and the molding space 60 is filled with molten metal material, the movement of the hollow tube 100 within the molding space 60 is restricted by the protruding member 70. Therefore, the hollow tube 100 can be held at a predetermined position in the molding space 60, and a casting 140 with the hollow tube 100 precisely positioned at a predetermined location can be manufactured.

[0096] The manufacturing method of this embodiment may also include a fluid filling step (step S40) before the filling step (step S50), in which an incompressible fluid is injected from the first end 102 of the hollow tube 100 to fill the hollow tube 100 with incompressible fluid. According to the above method, when the hollow tube 100 is positioned in the molding space 60 and incompressible fluid is filled into it, the incompressible fluid will not scatter or leak into the molding space 60 when the hollow tube 100 is positioned in the molding space 60.

[0097] The manufacturing method of this embodiment may also include a discharge step (step S60) before the demolding step (step S70), in which the incompressible fluid filling the hollow tube 100 is discharged. According to the above method, when the casting 140 is removed from the mold 20, the incompressible fluid is discharged from the hollow tube 100, so that the incompressible fluid does not scatter to the outside when the casting 140 is removed from the mold 20.

[0098] In the casting 140 of this embodiment, when viewed from the second direction D2, the metal material 120 has an inner peripheral surface 122 located radially inward of the intermediate portion 110 and a recess 124 recessed radially outward from the inner peripheral surface 122. According to the above method, the surface area of ​​the inner peripheral surface 122 of the metal material 120 is increased, thus improving cooling performance.

[0099] In the casting 140 of this embodiment, the recess 124 extends along the second direction D2. According to the above method, the surface area of ​​the inner circumferential surface 122 of the metal material 120 becomes larger, thus further improving cooling performance.

[0100] In the casting 140 of this embodiment, the end of the recess 124 in the inner peripheral surface 122 in the second direction D2 opens towards the second direction D2. According to the above method, the surface area of ​​the inner peripheral surface 122 of the metal material 120 becomes larger, thus further improving cooling performance.

[0101] In the casting 140 of this embodiment, the end of the recess 124 on the other side of the second direction D2 in the inner peripheral surface 122 may open towards the second direction D2. According to the above method, the surface area of ​​the inner peripheral surface 122 of the metal material 120 becomes larger, thus further improving the cooling performance.

[0102] Figure 12 This is a perspective view of the sliding core 170 in a modified example. (See attached image.) Figure 12 As shown, the sliding core 170 has four protrusions 152. The four protrusions 152 are evenly spaced in the circumferential direction of the outer peripheral surface 150S. Except for including the four protrusions 152, the sliding core 170 has the same structure as the sliding core 150. (As shown...) Figure 13 As shown, with the sliding core 170 inserted into the intermediate portion 110, when viewed from the second direction D2, the protrusion 152 is positioned opposite to the protruding member 70. Here, for example, the protrusion 152B is positioned opposite at least a portion of the core-side protruding member 73. When the casting 140 is manufactured using the sliding core 170, the metal material 120 has four recesses 124.

[0103] In the mold 20 of this embodiment, with the sliding core 170 inserted into the intermediate portion 110, when viewed from the second direction D2, the protrusion 152B is positioned opposite at least a portion of the core-side protruding member 73. According to the above solution, the position of the intermediate portion 110 can be maintained over a larger circumferential range by means of the protrusion 152B and the core-side protruding member 73, thus enabling the manufacture of a casting 140 in which the hollow tube 100 is precisely positioned according to a predetermined location.

[0104] Figure 14 This is a three-dimensional view of casting 180, a modified example. (For example...) Figure 14As shown, the metal material 120 has a plurality of recesses 184 recessed from the inner peripheral surface 122 toward the radially outer side. The plurality of recesses 184 are arranged in a second direction D2. The recesses 184 are circular when viewed radially. Furthermore, the shape of the recesses 184 is not limited to a circle, but may also be rectangular or elliptical, etc. The recesses 184 are formed to expand in diameter from the radially outer side toward the radially inner side. Additionally, a portion of the intermediate portion 110 may also be exposed to the outside of the recesses 184. Additionally, the metal material 120 has a plurality of other recesses 194 recessed from the outer peripheral surface 123 toward the radially inner side. The plurality of other recesses 194 are arranged in a second direction D2. The other recesses 194 are circular when viewed radially. Furthermore, the shape of the other recesses 194 is not limited to a circle, but may also be rectangular, elliptical, etc. The other recesses 194 are formed to expand in diameter from the radially inner side toward the radially outer side. Additionally, a portion of the intermediate portion 110 may also be exposed to the outside of the other recesses 194.

[0105] In the casting 180 of this embodiment, the metal material 120 has a plurality of recesses 184 arranged in the second direction D2. According to the above method, the surface area of ​​the inner peripheral surface 122 of the metal material 120 becomes larger, thus further improving the cooling performance.

[0106] In the casting 180 of this embodiment, the recess 184 is formed as a circle when viewed from a direction extending along a straight line orthogonal to the second direction D2 and passing through the center of the recess 184. According to the above method, for example, compared to the case where the recess 184 is formed as a rectangle, even though the recess 184 is formed on the surface of the casting 180, it is possible to suppress the breakage of the casting 180.

[0107] In the casting 180 of this embodiment, the recess 184 is formed such that its diameter increases from the radially outer side toward the radially inner side. According to the above method, the recess 184 increases in diameter as it approaches the surface side of the metal material 120. That is, it decreases in diameter as it approaches the depth of the recess 184, thus making it easy to inspect the condition of the recess 184 during final inspection, etc.

[0108] <Second Implementation Method>

[0109] Figure 15 This is a schematic diagram of the casting manufacturing apparatus 210 according to this embodiment. The casting manufacturing apparatus 210 manufactures castings having a hollow tube 100 (see reference). Figure 2 ) and casting 540 of metal material 120 for inserting the hollow tube 100 (refer to Figure 16 (A device.) Figure 15 As shown, the casting manufacturing apparatus 210 includes a mold 220, a filling material conveying device 80, and a metal material conveying device 90.

[0110] like Figure 16As shown, casting 540 includes a hollow tube 100 and a metal material 120 for inserting the hollow tube 100. The hollow tube 100 is integral with the metal material 120. A portion of the first end 102, a portion of the second end 106, and a portion of the intermediate portion 110 (i.e., a portion of the bend 112) of the hollow tube 100 are covered by the metal material 120. A portion of the first end 102 including the inlet 103, a portion of the second end 106 including the outlet 107, and a portion of the intermediate portion 110 are exposed to the outside from the metal material 120. The intermediate portion 110 has a plurality of exposed portions 114 that are exposed to the outside from the metal material 120 and arranged in a second direction D2. The exposed portions 114 are the bend 112 (see reference 120). Figure 3A The exposed portion 114 is part of the locked portion 113 (see reference). Figure 3A It is part of ( ). Casting 540 can be used, for example, as a housing for a drive motor.

[0111] like Figure 15 As shown, mold 220 includes mold body 225. Mold body 225 includes fixed mold 230, movable mold 240 that can be brought close to or separated from fixed mold 230, core 250 located at least partially between fixed mold 230 and movable mold 240, and sliding core 150 located at least partially between fixed mold 230 and movable mold 240.

[0112] The mold 220 has a plurality of grooves 270 (see reference) that restrict the movement of the hollow tube 100 within the molding space 60 when molten metal is injected into the molding space 60. Figure 21 A groove 270 is formed on the inner surface of the mold body 225. The groove 270 is an example of a limiting member. The depth of the groove 270 is approximately the same as the radius (half the outer diameter) of the hollow tube 100. Furthermore, the depth of the groove 270 can be shallower or deeper than the radius of the hollow tube 100, as long as it can limit the movement of the locking portion 113 disposed in the groove 270. All grooves 270 can have the same depth or different depths. Figure 21 As shown, the groove 270 includes a fixed mold side groove 271 disposed on the fixed mold 230, a movable mold side groove 272 disposed on the movable mold 240, and a core side groove 273 disposed on the core 250. The depths of the fixed mold side groove 271, the movable mold side groove 272, and the core side groove 273 can be the same, different, or partially the same and partially different.

[0113] like Figure 17As shown, a movable mold side groove 272 is provided in the movable mold 240. A portion of the middle portion 110 of the hollow tube 100 is disposed in the movable mold side groove 272. The movable mold side groove 272 is formed to clamp the hollow tube 100. The movable mold side groove 272 is formed on the inner surface 40A of the movable mold 240. The movable mold side groove 272 extends along the third direction D3. The cross-section of the movable mold side groove 272 is semi-circular. The movable mold side groove 272 is located below the first holding portion 42A and the second holding portion 42B. The movable mold side groove 272 has a plurality of locking grooves 272A for the locking portion 113 of the hollow tube 100 to be inserted when the hollow tube 100 is disposed in the molding space 60. The plurality of locking grooves 272A are arranged at equal intervals in the second direction D2. The spacing between adjacent locking grooves 272A is the same as the spacing between adjacent bends 112 of the hollow tube 100. The cross-section of the locking groove 272A is semi-circular. Figure 18 As shown, multiple locking slots 272A are configured to contact the hollow tube 100 (more specifically, the locked portion 113). The locking slots 272A are formed to clamp the locked portion 113. In this embodiment, five locking slots 272A are provided in the movable mold 240, but the number of locking slots 272A is not limited to five. The lengths of the third-direction D3 of the multiple locking slots 272A are the same. However, the lengths of the third-direction D3 of the multiple locking slots 272A may also be different. For example, the length of the third-direction D3 of a portion of the multiple locking slots 272A may differ from the length of the third-direction D3 of another portion of the multiple locking slots 272A.

[0114] like Figure 19As shown, a fixed mold side groove 271 is provided in the fixed mold 230. A portion of the middle portion 110 of the hollow tube 100 is disposed in the fixed mold side groove 271. The fixed mold side groove 271 is formed to clamp the hollow tube 100. The fixed mold side groove 271 is formed on the inner surface 30A of the fixed mold 230. The fixed mold side groove 271 extends along a third direction D3. The cross-section of the fixed mold side groove 271 is semi-circular. The fixed mold side groove 271 has a plurality of locking grooves 271A for the locking portion 113 of the hollow tube 100 to be inserted when the hollow tube 100 is disposed in the molding space 60. The plurality of locking grooves 271A are arranged at equal intervals in the second direction D2. The spacing between adjacent locking grooves 271A is the same as the spacing between adjacent bends 112 of the hollow tube 100. The cross-section of the locking grooves 271A is semi-circular. Multiple locking slots 271A are configured to contact the hollow tube 100 (more specifically, the locked portion 113). The locking slots 271A are formed to clamp the locked portion 113. In this embodiment, five locking slots 271A are provided in the fixed mold 230, but the number of locking slots 271A is not limited to five. The third-direction D3 lengths of the multiple locking slots 271A are the same as each other. Furthermore, the third-direction D3 lengths of the multiple locking slots 271A may also be different from each other. For example, the third-direction D3 length of a portion of the multiple locking slots 271A may be different from the third-direction D3 length of another portion of the multiple locking slots 271A. When the mold 220 is closed, the locking slots 272A of the movable mold side groove 272 (refer to...) Figure 17 It is continuous with the locking groove 271A of the fixed mold side groove 271.

[0115] like Figure 20As shown, a core-side groove 273 is provided in the core 250. A portion of the middle portion 110 of the hollow tube 100 is disposed in the core-side groove 273. The core-side groove 273 is formed to clamp the hollow tube 100. The core-side groove 273 is formed on the inner surface 50A of the core 250. The core-side groove 273 extends along a first direction D1. The cross-section of the core-side groove 273 is semi-circular. The core-side groove 273 has a plurality of locking grooves 273A for the locking portion 113 of the hollow tube 100 to be inserted when the hollow tube 100 is disposed in the molding space 60. The plurality of locking grooves 273A are arranged at equal intervals in a second direction D2. The spacing between adjacent locking grooves 273A is the same as the spacing between adjacent bends 112 of the hollow tube 100. The cross-section of the locking grooves 273A is semi-circular. Multiple locking slots 273A are configured to contact the hollow tube 100 (more specifically, the locked portion 113). The locking slots 273A are formed to clamp the locked portion 113. In this embodiment, five locking slots 273A are provided in the core 250, but the number of locking slots 273A is not limited to five. The lengths of the first direction D1 of the multiple locking slots 273A are the same. Alternatively, the lengths of the first direction D1 of the multiple locking slots 273A may be different. For example, the length of the first direction D1 of a portion of the multiple locking slots 273A may differ from the length of the first direction D1 of another portion of the multiple locking slots 273A.

[0116] like Figure 21As shown, when the hollow tube 100 is positioned in the molding space 60, the movable mold-side groove 272, the fixed mold-side groove 271, and the core-side groove 273 clamp the locking portion 113 of the hollow tube 100, thus restricting the movement of the hollow tube 100 (particularly the radially outward movement of the middle portion 110 and the movement in the second direction D2). With the hollow tube 100 positioned in the molding space 60, the locking portion 113 of the hollow tube 100 is embedded in the locking groove 272A of the movable mold-side groove 272, the locking groove 271A of the fixed mold-side groove 271, and the locking groove 273A of the core-side groove 273, thus holding the middle portion 110 of the hollow tube 100 in a predetermined position. In this embodiment, the core-side groove 273 is located above the center of the middle portion 110 in the third direction D3 and at the center of the middle portion 110 in the first direction D1. The movable mold side groove 272 is located below the center of the third direction D3 of the hollow tube 100 and closer to the first end 102 than the center of the first direction D1 of the hollow tube 110. The fixed mold side groove 271 is located below the center of the third direction D3 of the hollow tube 100 and closer to the side opposite to the first end 102 than the center of the first direction D1 of the hollow tube 110. Furthermore, when viewed from the centerline 110C of the hollow tube 110 (i.e., from the second direction D2), the inner surface 30A of the fixed mold 30, the inner surface 40A of the movable mold 40, and the inner surface 50A of the core 50 overlap with the centerline 100C of the hollow tube 100. Therefore, the groove 270 reliably restricts the movement of the hollow tube 100 within the molding space 60, and more reliably keeps the hollow tube 100 at a predetermined position within the molding space 60. Furthermore, when viewed from the centerline 110C of the intermediate portion 110, the inner surface 30A of the fixed mold 30, the inner surface 40A of the movable mold 40, and the inner surface 50A of the core 50 can also be located closer to the centerline 110C of the intermediate portion 110 than the centerline 100C of the hollow tube 100. In this case, the groove 270 can further reliably restrict the movement of the hollow tube 100 within the molding space 60, and can further reliably keep the hollow tube 100 at a predetermined position in the molding space 60. Moreover, the inner surface 30A of the fixed mold 30, the inner surface 40A of the movable mold 40, and the inner surface 50A of the core 50 do not need to all be in the aforementioned relationship; at least a portion of them need to be.

[0117] In the mold 220 of this embodiment, a groove 270 is formed on the inner surface of the mold body 225. According to the above method, by arranging the hollow tube 100 in the groove 270, the movement of the hollow tube 100 can be easily restricted.

[0118] In the mold 220 of this embodiment, the groove 270 can also be formed to clamp the hollow tube 100. According to the above method, the hollow tube 100 is clamped by the groove 270, thus the movement of the hollow tube 100 can be more reliably restricted.

[0119] In the mold 220 of this embodiment, the groove 270 has a plurality of locking slots 271A, 272A, and 273A arranged in a predetermined direction for the locking part 113 to be inserted when the hollow tube 100 is disposed in the molding space 60. According to the above method, the movement of the locking part 113 in the predetermined direction (e.g., the second direction D2) can be more reliably restricted, and therefore it is possible to manufacture a casting 540 in which the hollow tube 100 is precisely disposed in the predetermined position.

[0120] In the mold 220 of this embodiment, the hollow tube 100 may have a circular cross-section, and the groove 270 may have a semi-circular cross-section. According to the above method, the hollow tube 100 can be easily positioned in the groove 270.

[0121] In the casting 540 of this embodiment, a portion of the middle section 110 of the hollow tube 100, that is, the portion that contacts the bottom of the groove 270, is exposed to the outside from the metal material 120. According to this method, heat dissipation through the solvent or the like within the hollow tube 100 is improved. Furthermore, another portion of the middle section 110 is not exposed to the outside from the metal material 120 and is therefore protected by the metal material 120. Thus, by exposing a portion of the middle section 110 to the outside from the metal material 120, a casting 540 optimally suited to the intended use and operating environment can be provided.

[0122] In the casting 540 of this embodiment, the intermediate portion 110 has a plurality of exposed portions 114 that protrude from the metal material 120 to the outside and are arranged in a predetermined direction (here, the second direction D2). According to the above method, since the plurality of exposed portions 114 protrude from the metal material 120 to the outside, the heat dissipation of solvents and the like passing through the hollow tube 100 is further improved.

[0123] In the casting 540 of this embodiment, the middle portion 110 may be formed in a spiral shape and have a curved portion 112 that is bent into an arc shape, with a portion of the curved portion 112 exposed to the outside from the metal material 120. According to the above method, the heat dissipation of solvents and the like passing through the hollow tube 100 is improved.

[0124] In the casting 540 of this embodiment, the middle portion 110 may have a plurality of curved portions 112 arranged in a predetermined direction. According to the above method, the plurality of curved portions 112 are exposed to the outside from the metal material 120, thereby further improving the heat dissipation of solvents and the like passing through the hollow tube 100.

[0125] In the casting 540 of this embodiment, a portion of the middle portion 110 may be exposed to the outside of the recess 124. According to the above method, the heat dissipation of solvents and the like passing through the hollow tube 100 is further improved.

[0126] The preferred embodiments of the present invention have been described above. However, the above embodiments are merely illustrative, and the present invention can be implemented in various other ways.

[0127] In the first embodiment described above, the fixed mold 30, the movable mold 40, and the core 50 are provided with protruding members 70, but this is not a limitation. For example, either the fixed mold 30 or the movable mold 40 may be provided with the protruding member 70, and either the fixed mold 30 or the movable mold 40 may be provided with a groove 270. Alternatively, the core 50 may be provided with a groove 270 instead of the protruding member 70. According to the above method, the movement of the hollow tube 100 can be more reliably restricted.

[0128] In the second embodiment described above, grooves 270 are formed in the fixed mold 230, the movable mold 240, and the core 250, but this is not a limitation. For example, either the fixed mold 230 or the movable mold 240 may have a protruding member 70, and the groove 270 may be formed in the other of the fixed mold 230 and the movable mold 240. Alternatively, the core 250 may have a protruding member 70 instead of a groove 270. According to the above method, the movement of the hollow tube 100 can be more reliably restricted.

[0129] In the first embodiment described above, the mold 20 includes a core 50, but the mold 20 may also not include a core 50. Furthermore, in the second embodiment described above, the mold 220 includes a core 250, but the mold 220 may also not include a core 250.

[0130] In the first embodiment described above, the protruding member 70 includes a fixed mold side protruding member 71 disposed on the fixed mold 30, a movable mold side protruding member 72 disposed on the movable mold 40, and a core side protruding member 73 disposed on the core 50, but is not limited to these. The protruding member 70 may have at least one of the fixed mold side protruding member 71, the movable mold side protruding member 72, and the core side protruding member 73.

[0131] In the first embodiment described above, the movable mold-side protruding members 72 are arranged in a straight line along the second direction D2, but this is not a limitation. For example, as... Figure 22As shown, the movable mold side protrusion 72 can also be staggered along the third direction D3. Furthermore, the fixed mold side protrusion 71 is not limited to being arranged in a straight line along the second direction D2, but can also be staggered along the third direction D3. Additionally, the core side protrusion 73 is not limited to being arranged in a straight line along the second direction D2, but can also be staggered along the first direction D1.

[0132] In the first embodiment described above, when the hollow tube 100 is disposed in the molding space 60, a plurality of movable mold-side protruding members 72 are arranged such that they are respectively located between adjacent locked portions 113, but this is not a limitation. Figure 23 As shown, the movable mold side protrusion member 72 can also be arranged in a part that is not adjacent to the locked part 113 (e.g., the position that clamps the first end 102, the position that clamps the second end 106).

[0133] In the above-described embodiment, the injection port 65 is divided by a movable mold-side injection port 65A formed on the movable mold 40 and a fixed mold-side injection port 65B formed on the fixed mold 30, but is not limited thereto. For example, the injection port 65 may also be formed by the movable mold 40, the fixed mold 30, and the core 50, and in addition to the movable mold-side injection port 65A and the fixed mold-side injection port 65B, it may also be divided by a core-side injection port formed on the core 50.

[0134] In the above embodiment, when the hollow tube 100 is disposed in the molding space 60 (i.e., the hollow tube is installed in the movable mold 40), the middle part 110 of the hollow tube 100 does not contact the inner surface 40A of the movable mold 40, the inner surface 30A of the fixed mold 30, and the inner surface 50A of the core 50, but a part of the middle part 110 may contact a part of the inner surface 40A, the inner surface 30A, and the inner surface 50A.

[0135] In the above embodiments, when the hollow tube 100 is disposed in the molding space 60 (i.e., the hollow tube is installed in the movable mold 40), all the protruding members 70 are in contact with the hollow tube 100. However, when hollow tubes with different shapes and diameters are used in the same mold 20, the protruding members 70 in contact with the hollow tube may also be different depending on the type of hollow tube. That is, some of the protruding members 70 may not be in contact with the hollow tube.

[0136] In the above embodiment, the hollow tube 100 has a central portion 110 formed in a spiral shape, but the shape of the hollow tube 100 is not limited to this. For example, as Figure 24As shown, the intermediate portion 110 can also be a wavy shape extending in a predetermined direction (here, the second direction D2). In this case, the manufactured casting becomes a flat plate. According to the above method, although the wavy intermediate portion 110 is prone to move in the second direction D2 when the molten metal flows into the forming space 60, since the movement of the intermediate portion 110 in the second direction D2 is restricted by the protruding member 70, it is possible to manufacture a casting in which the hollow tube 100 is precisely positioned in a predetermined location. Figure 24 As shown, the movable mold 340 may also have the same protruding member 70 as the movable mold 40 of the first embodiment. In this case, the protrusion of the protruding member 70 from the inner surface 40A is such that the middle portion 110 of the hollow tube 100 is located on the inner surface 40A side closer than the end of the protruding member 70. Furthermore, as... Figure 25 As shown, the same groove 270 as the movable mold 240 in the second embodiment can also be formed in the movable mold 440.

[0137] In the above embodiment, molten metal material is injected into the molding space 60 while the hollow tube 100 is filled with an incompressible fluid, but this is not a limitation. For example, molten metal material can also be injected into the molding space 60 while the hollow tube 100 is not filled with an incompressible fluid (i.e., the hollow tube 100 is hollow), and the molding space 60 can be filled with molten metal material.

[0138] In the above embodiment, a hollow tube 100 is used as an example of a tube, but a solid tube can also be used. When using a solid tube, for example, the hollow tube 100 is arranged in a solid state with a filler such as salt or an incompressible fluid inside. For example, in the manufacturing method of the above embodiment, the fluid filling step (step S40) is performed after the arrangement step (step S20), but the fluid filling step (step S40) can also be performed before the arrangement step (step S20). That is, the hollow tube 100 can be filled with, for example, a filler before being arranged in the molding space 60, and the solid hollow tube 100 filled with the filler is arranged in the molding space 60. In this case, the filler inside the hollow tube 100 can be discharged before the casting 140 is removed from the mold 20, or it can be discharged after the casting 140 is removed from the mold 20.

[0139] In addition, as other specific methods of the technology disclosed herein, the methods described in the following items can be cited.

[0140] Item 1: A casting manufacturing apparatus includes a mold comprising a fixed mold and a movable mold that can approach or separate from the fixed mold, and is configured to place a tube in a forming space formed by the movable mold and the fixed mold, the tube having: a first straight portion having a first opening formed at one end; a second straight portion having a second opening formed at the other end and parallel to the first straight portion; and a main body portion located between the first straight portion and the second straight portion, the fixed mold or the movable mold having: a first holding portion for inserting into and holding the first straight portion; and a second holding portion for inserting into and holding the second straight portion.

[0141] According to the above method, the first straight section and the second straight section are parallel to each other. The fixed mold or the movable mold has a first holding section for inserting and holding the first straight section and a second holding section for inserting and holding the second straight section, thus improving the workability of installing the tube into the fixed mold or the movable mold. Furthermore, before installing the tube into the fixed mold or the movable mold, an incompressible fluid can be filled into the tube, or the tube can be installed into the fixed mold or the movable mold in a hollow state without filling it with an incompressible fluid. Here, the first holding section and the second holding section can also be provided in the same mold, and the first straight section and the second straight section can be installed in the same mold. By providing the first holding section and the second holding section in the same mold, and installing the first straight section and the second straight section in the same mold, the workability of installing the tube into the mold is further improved.

[0142] Label Explanation

[0143] 10 Casting Manufacturing Equipment

[0144] 20 molds

[0145] 25 Mold body

[0146] 30 Fixed mold

[0147] 40 movable molds

[0148] 42. Holding section

[0149] Type 50 core

[0150] 60 Molding Space

[0151] 65 Injection Entry

[0152] 70. Protruding components (restrictive components)

[0153] 71 Fixed mold side protruding component

[0154] 72. Protruding component on the side of the movable mold

[0155] Type 73 core side protruding component

[0156] 80 Filler conveying device

[0157] 90 Metal Material Conveying Device

[0158] 100 Hollow Tubes (Pipes)

[0159] 102 First end

[0160] 106 Second end

[0161] 110 Middle section

[0162] 112 Bend

[0163] 113 Fixed Department

[0164] 120 Metallic Materials

[0165] 122 Inner circumferential surface

[0166] 124 recess

[0167] 140 castings

[0168] 150 Sliding Core

[0169] 150S outer perimeter

[0170] 152 Protrusion (Restricting Member)

[0171] 270 Groove (Restricting Member)

Claims

1. A mold, comprising: The mold body comprises a fixed mold and a movable mold, wherein the movable mold is capable of moving closer to or separating from the fixed mold; The molding space is divided by at least the fixed mold and the movable mold and is capable of accommodating tubes; The injection port allows molten metal material to be injected into the molding space; The retaining part holds both ends of the tube; and A limiting member restricts the movement of the tube within the molding space when the molten metal material is injected into the molding space.

2. The mold according to claim 1, wherein, The limiting member is integrally formed with the mold body.

3. The mold according to claim 1 or 2, wherein, The limiting member is a protruding member that extends from the inner surface of the mold body toward the molding space.

4. The mold according to claim 3, wherein, The mold has multiple protruding components. The tube has a first end, a second end, and a middle portion, wherein the second end and the first end are arranged in a predetermined direction, and the middle portion is located between the first end and the second end. The intermediate portion has a plurality of locking portions, which are arranged in the predetermined direction. The plurality of protruding members are configured to be located between adjacent locked portions when the tube is disposed in the forming space.

5. The mold according to claim 4, wherein, The amount of protrusion from the inner surface of the mold body of the plurality of protruding members is the same for each other.

6. The mold according to claim 4, wherein, The amount by which a portion of the protruding members protrude from the inner surface of the mold body differs from the amount by which another portion of the protruding members protrude from the inner surface of the mold body.

7. The mold according to claim 4, wherein, In adjacent protruding members, the spacing on the end side is wider than the spacing on the root side.

8. The mold according to claim 1, wherein, The limiting member is a groove formed on the inner surface of the mold body.

9. The mold according to claim 8, wherein, The groove is formed to clamp the tube.

10. The mold according to claim 8, wherein, The tube has a first end, a second end, and a middle portion, wherein the second end and the first end are arranged in a predetermined direction, and the middle portion is located between the first end and the second end. The intermediate portion has a plurality of locking portions, which are arranged in the predetermined direction. The groove has a plurality of locking slots, which are arranged in the predetermined direction for the locked portion to be embedded when the tube is disposed in the forming space.

11. The mold according to any one of claims 8 to 10, wherein, The cross-section of the tube is circular. The groove has a semi-circular cross-section.

12. The mold according to claim 1 or 2, wherein, The mold has multiple of the aforementioned limiting components. The mold body has a first inner surface and a second inner surface opposite to the first inner surface. A portion of the plurality of said limiting members is disposed on the first inner surface. Another portion of the plurality of said limiting members is disposed on the second inner surface.

13. The mold according to claim 1 or 2, wherein, The mold has multiple of the aforementioned limiting components. A portion of each of the aforementioned limiting members is disposed on the inner surface of the fixed mold. Another portion of the plurality of the limiting members is disposed on the inner surface of the movable mold.

14. The mold according to claim 13, wherein, The mold body has a core, and at least a portion of the core is located between the fixed mold and the movable mold. The molding space is divided by at least the fixed mold, the movable mold, and the core. A portion of the plurality of the limiting members is disposed on the inner surface of the core.

15. The mold according to claim 1, wherein, The limiting member is disposed on the mold body in a detachable manner.

16. The mold according to claim 1, wherein, The fixed mold and the movable mold are respectively provided with the limiting member. The limiting member disposed on the fixed mold is a protruding member that protrudes from the inner surface of the fixed mold toward the molding space. The limiting member provided on the movable mold is a groove formed on the inner surface of the movable mold.

17. The mold according to claim 1, wherein, The fixed mold and the movable mold are respectively provided with the limiting member. The limiting member provided in the fixed mold is a groove formed on the inner surface of the fixed mold. The limiting member disposed on the movable mold is a protruding member that protrudes from the inner surface of the movable mold toward the molding space.

18. The mold according to claim 1, wherein, The tube has a first end, a second end, and a middle portion, wherein the second end and the first end are arranged in a predetermined direction, and the middle portion is located between the first end and the second end. The limiting member is configured to restrict the movement of the intermediate part in the specified direction.

19. The mold according to claim 18, wherein, The middle portion is formed in a spiral shape extending along the specified direction.

20. The mold according to claim 18, wherein, The middle portion is formed as a wavy line extending along the specified direction.

21. The mold according to claim 18, wherein, At least the end portion of the limiting member is formed to taper in diameter as it moves toward the end.

22. The mold according to claim 1, wherein, The tube has a first end, a second end, and a middle portion, wherein the second end and the first end are arranged in a predetermined direction, and the middle portion is located between the first end and the second end. The middle portion is formed in a spiral shape extending along the specified direction. The limiting member is configured to restrict the movement of the middle portion in a direction intersecting the predetermined direction.

23. The mold according to claim 22, wherein, The limiting member is configured to restrict the movement of the middle portion in a direction orthogonal to the specified direction.

24. The mold according to claim 22, wherein, The limiting member protrudes from the inner surface of the mold body toward the tube. At least the end portion of the limiting member is formed to taper in diameter as it moves toward the end.

25. The mold according to claim 22, wherein, The mold body has a sliding core, which extends along the predetermined direction and is inserted into the middle portion. The molding space is divided by at least the fixed mold, the movable mold, and the sliding core. The limiting member includes a protrusion formed on the outer peripheral surface of the sliding core and protruding toward the middle portion.

26. The mold according to claim 25, wherein, The protrusion extends in the prescribed direction.

27. The mold according to claim 25, wherein, The mold has a discharge port that communicates with the injection port and discharges molten metal material into the molding space. With the sliding core inserted into the middle portion, at least a portion of the protrusion is configured to face the outlet.

28. The mold according to claim 25, wherein, The sliding core is formed in a cylindrical shape. A plurality of protrusions, which are circumferentially separated from each other, are formed on the outer peripheral surface of the sliding core.

29. The mold according to claim 25, wherein, The limiting member includes a protruding member that protrudes from the inner surface of the mold body toward the molding space. The protruding member is configured to restrict the movement of the intermediate portion in the prescribed direction. With the sliding core inserted into the middle portion, when viewed from the predetermined direction, the protrusion is positioned opposite at least a portion of the protruding member.

30. The mold according to claim 25, wherein, The limiting member includes a first protruding member and a second protruding member, which protrude from the inner surface of the mold body toward the molding space. The first protruding member and the second protruding member are configured to protrude toward different circumferential portions of the intermediate portion, and restrict the movement of the intermediate portion in the predetermined direction. With the sliding core inserted into the middle portion, when viewed from the predetermined direction, the protrusion is located between the first protruding member and the second protruding member in the circumferential direction of the middle portion.

31. A casting manufacturing apparatus, comprising: A mold comprising a fixed mold, a movable mold, a molding space, an injection port, a retaining portion, and a limiting member, wherein the movable mold is capable of approaching or separating relative to the fixed mold; the molding space is divided at least by the fixed mold and the movable mold and is capable of housing a tube; the injection port is capable of injecting molten metal material into the molding space; the retaining portion holds both ends of the tube; and the limiting member restricts the movement of the tube within the molding space when the molten metal material is injected into the molding space. A metal material conveying device injects the molten metal material from the injection port into the forming space.

32. A manufacturing method for a casting, the casting comprising a tube and a metal material for casting the tube, wherein, The manufacturing method of the casting includes the following steps: The preparation process includes preparing a mold, which comprises a fixed mold, a movable mold, a molding space, an injection port, a holding part, and a limiting member. The movable mold can move closer to or separate from the fixed mold. The molding space is divided by at least the fixed mold and the movable mold and can accommodate the tube. The injection port can inject molten metal material into the molding space. The holding part holds both ends of the tube. The limiting member restricts the movement of the tube within the molding space when the molten metal material is injected into the molding space. In the configuration process, the retaining part holds the tube in contact with the limiting member, and the tube is positioned in the forming space; In the mold closing process, the movable mold is brought close to the fixed mold to close the mold. In the filling process, molten metal material is injected from the injection port into the molding space, and the molding space is filled with molten metal material. and The demolding process involves separating the movable mold from the fixed mold to open the mold and remove the casting.

33. The manufacturing method according to claim 32, wherein, Prior to the filling process, a fluid filling process is also included, in which an incompressible fluid is injected from one end of the tube to fill the tube with incompressible fluid.

34. The manufacturing method according to claim 33, wherein, Prior to the demolding process, a discharge process is also included, in which the incompressible fluid filling the tube is discharged.

35. The manufacturing method according to claim 32, wherein, The tube is a hollow tube. In the configuration process, the holding part holds the hollow tube and the hollow tube is configured in the molding space.

36. A casting, wherein, The casting has the following features: pipe; and Metal material is used to inlay and cast the tube. The tube has: First end; The second end; and The middle part is located between the first end and the second end. The first end and the second end protrude outward from the metal material. A portion of the middle section is exposed to the outside from the metal material.

37. The casting according to claim 36, wherein, The first end and the second end are arranged in a predetermined direction. The middle portion has multiple exposed portions that extend outward from the metal material and are arranged in the prescribed direction.

38. The casting according to claim 36, wherein, The middle portion is formed in a spiral shape and has a curved portion that is bent into an arc shape. A portion of the curved section is exposed to the outside from the metal material.

39. The casting according to claim 38, wherein, The first end and the second end are arranged in a predetermined direction. The intermediate portion has a plurality of curved portions arranged in the prescribed direction.

40. The casting according to claim 36, wherein, A recess is formed on the surface of the metal material. A portion of the middle section is exposed to the outside of the recess.

41. A casting, wherein, The casting has the following features: pipe; and Metal material is used to inlay and cast the tube. The tube has: First end; The second end is arranged in a predetermined direction with the first end; and The middle part is located between the first end and the second end. The middle portion is formed in a spiral shape extending along the specified direction. When viewed from the specified direction, the metal material has an inner circumferential surface located radially inward from the middle portion and a recessed portion extending radially outward from the inner circumferential surface.

42. The casting according to claim 41, wherein, The recess extends along the specified direction.

43. The casting according to claim 42, wherein, The recess opens in the specified direction at one end of the inner circumferential surface.

44. The casting according to claim 43, wherein, The recess opens in the specified direction at the end opposite to the specified end of the inner circumferential surface.

45. The casting according to claim 41, wherein, The metallic material has a plurality of said recesses, which are arranged in the prescribed direction.

46. ​​The casting according to claim 45, wherein, The recess is circular when viewed from a direction extending from a straight line orthogonal to the specified direction and passing through the center of the recess.

47. The casting according to claim 46, wherein, The recess is formed such that its diameter increases from the outer side of the radial direction toward the inner side of the radial direction.

48. The casting according to claim 41, wherein, When viewed from the specified direction, the metal material has an outer peripheral surface located radially outward from the middle portion and other recesses recessed inward from the outer peripheral surface toward the radial direction.

49. The casting according to claim 48, wherein, The metallic material has a plurality of the other recesses arranged in the prescribed direction.

50. The casting according to claim 49, wherein, The other recesses are circular when viewed from a direction extending from a straight line orthogonal to the specified direction and passing through the center of the other recesses.

51. The casting according to claim 50, wherein, The other recesses are formed to increase in diameter as they expand from the inner side of the radial direction toward the outer side of the radial direction.

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