Casting manufacturing methods, casting manufacturing equipment and molds

Abstract

The manufacturing method includes: a preparation step, preparing a mold (20) comprising a fixed mold (30) and a movable mold (40); a configuration step, configuring a tube (100) in the mold (20) such that an injection port (103) and an outlet port (107) are exposed to the outside from the mold (20); a mold closing step, closing the mold (20); a first filling step, injecting an incompressible fluid from the injection port (103) to fill the third flow path (111) of the main body (110) of the tube (100) with an incompressible fluid; a second filling step, filling the molding space (50) formed by the movable mold (40) and the fixed mold (30) with molten metal material; a discharge step, discharging the incompressible fluid filled into the third flow path (111) from the outlet port (107); and a removal step, opening the mold (20) by removing the movable mold (40) from the fixed mold (30) and removing the casting (140) from which the incompressible fluid has been discharged from the third flow path (111).

Description

Technical Field

[0001] This invention relates to a method for manufacturing castings, an apparatus for manufacturing castings, and a mold. 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, pre-made tubes, which are separate from the casting itself, are assembled. More specifically, in inlay casting, tubes are 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 assembled tubes. Examples of castings with assembled 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 forming a cavity, molten metal is injected into the cavity, and then 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, after the casting with the assembled smart core is removed from the mold, the filler material inside the tubular tube is removed. That is, after the casting is removed from the mold, it needs to be placed into a device for removing the filler. Therefore, the manufacturing time of the casting may be longer.

[0009] The present invention was made in view of the above-mentioned problems, and its object is to provide a method for manufacturing castings and an apparatus for manufacturing castings capable of efficiently removing incompressible fluids filled into tubes assembled in castings.

[0010] Methods for solving problems

[0011] The present invention relates to a method for manufacturing a casting, the casting comprising: a tube having an inlet for injecting an incompressible fluid, an outlet for discharging the incompressible fluid, and a flow path located between the inlet and the outlet for the flow of the incompressible fluid; and a metal material for casting the tube. The manufacturing method includes: a preparation step of preparing a mold comprising a fixed mold and a movable mold capable of approaching or moving away from the fixed mold; a configuration step of arranging the tube within the mold such that the inlet and the outlet are exposed to the outside of the mold; a mold closing step of closing the mold by bringing the movable mold close to the fixed mold; a first filling step of injecting the incompressible fluid from the inlet and filling the flow path with the incompressible fluid; a second filling step of filling the molding space formed by the movable mold and the fixed mold with molten metal material; a discharge step of discharging the incompressible fluid filled into the flow path from the outlet; and a removal step of opening the mold by moving the movable mold away from the fixed mold and removing the casting from which the incompressible fluid has been discharged from the flow path.

[0012] According to the manufacturing method of the present invention, an incompressible fluid is injected through an injection port while the tube is positioned in the mold. After molten metal material is filled into the molding space, the incompressible fluid is discharged through a discharge port while the tube is still positioned in the mold. In this way, the incompressible fluid filling the flow path of the tube is discharged through the discharge port while the casting is still in the mold, thus eliminating the need for a device for removing the incompressible fluid and reducing the manufacturing time of the casting. Furthermore, when the casting is removed from the mold while the flow path of the tube is filled with incompressible fluid, the incompressible fluid may scatter outwards from the injection port or discharge port of the tube. However, according to the above manufacturing method, the incompressible fluid is discharged when the casting is removed from the mold, thus preventing the incompressible fluid from scattering outwards.

[0013] Furthermore, the casting manufacturing apparatus of the present invention includes: a mold comprising a fixed mold and a movable mold capable of approaching or moving away from the fixed mold, the mold being configured such that, when a tube having a first straight portion, a second straight portion, and a main body portion is disposed in a molding space formed by the movable mold and the fixed mold, an injection port and an outlet are exposed to the outside, the first straight portion having an injection port for injecting an incompressible fluid, the second straight portion having an outlet for discharging an incompressible fluid, and the main body portion being located between the first straight portion and the second straight portion and having a flow path for the flow of the incompressible fluid; and a fluid conveying device installed to the injection port and the outlet of the tube disposed in the molding space, for injecting an incompressible fluid from the injection port and discharging an incompressible fluid from the outlet.

[0014] According to the casting manufacturing apparatus of the present invention, a fluid delivery device installed at the inlet and outlet of a pipe arranged in the molding space injects an incompressible fluid from the inlet and discharges the incompressible fluid from the outlet. Thus, with the pipe positioned within the mold, the incompressible fluid can be discharged from the outlet, eliminating the need for a device to remove the incompressible fluid and reducing the casting manufacturing time. Furthermore, the relative positional relationship between the fluid delivery device and the mold remains unchanged when injecting and discharging the incompressible fluid, enabling highly precise injection and discharge of the incompressible fluid.

[0015] Furthermore, the mold of the present invention includes a fixed mold and a movable mold that can approach or move away from the fixed mold, and is configured such that a tube having a first straight portion, a second straight portion, and a main body portion is disposed in a molding space formed by the movable mold and the fixed mold. The first straight portion has an injection port for injecting an incompressible fluid, the second straight portion has an outlet for discharging an incompressible fluid and is parallel to the first straight portion, and the main body portion is located between the first straight portion and the second straight portion and has a flow path for the incompressible fluid to flow through. The fixed mold or the movable mold includes 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, and is configured such that, in the state where the first straight portion of the tube is held by the first holding portion and the second straight portion is held by the second holding portion, the main body portion of the tube does not contact the fixed mold and the movable mold.

[0016] According to the mold of the present invention, the tube body is configured such that, with the first straight portion of the tube held by the first holding portion and the second straight portion held by the second holding portion, the tube body does not contact the fixed mold and the movable mold. Therefore, when molten metal material is filled into the molding space, the metal material is integrally cast into the tube body. That is, in the manufactured casting, the tube body is not exposed to the outside.

[0017] Invention Effects

[0018] According to the present invention, a method for manufacturing castings and an apparatus for manufacturing castings are provided, which can efficiently remove incompressible fluids filled into tubes assembled in the castings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a casting manufacturing apparatus according to one embodiment.

[0020] Figure 2 This is a schematic perspective view of a tube according to one embodiment.

[0021] Figure 3This is a schematic perspective view of a casting according to one embodiment.

[0022] Figure 4 This is a perspective view of a fixed mold according to one embodiment.

[0023] Figure 5 This is a side view showing the state in which a fixed mold holds a tube according to one embodiment.

[0024] Figure 6 This is a flowchart illustrating a method for manufacturing a casting according to one embodiment.

[0025] Figure 7 This is a cross-sectional view showing the closed state of a mold according to one embodiment.

[0026] Figure 8 This is a side view showing the fluid transport device according to one embodiment connected to a pipe held in a fixed mold.

[0027] Figure 9 This is a cross-sectional view showing a state in which a casting has been manufactured in a mold according to one embodiment.

[0028] Figure 10 This is a schematic side view illustrating a state in which the movable mold is separated from the fixed mold and the mold is opened according to one embodiment. Detailed Implementation

[0029] Hereinafter, embodiments of the casting manufacturing apparatus according to 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.

[0030] 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, i.e., a casting method under high speed and high pressure. Here, the high pressure is, for example, 20 MPa to 100 MPa. The casting manufacturing apparatus 10 manufactures parts with tubes 100 (see reference 100). Figure 2 ) and casting 140 of metal material 120 of inlaid tube 100 (refer to Figure 3 The casting manufacturing apparatus 10 includes a mold 20 and a fluid conveying device 80.

[0031] Tube 100 is formed of a metal with high thermal conductivity (e.g., an aluminum alloy). For example... Figure 2As shown, the pipe 100 has a first straight portion 102, a second straight portion 106 parallel to the first straight portion 102, and a main body portion 110 located between the first straight portion 102 and the second straight portion 106. The first straight portion 102, the second straight portion 106, and the main body portion 110 are integrally formed. The first straight portion 102 has an inlet 103 for injecting an incompressible fluid and a first flow path 104 communicating with the inlet 103 and through which the incompressible fluid flows. The second straight portion 106 has an outlet 107 for discharging an incompressible fluid and a second flow path 108 communicating with the outlet 107 and through which the incompressible fluid flows. The first straight portion 102 and the second straight portion 106 have the same length from the main body portion 110, but they may be different. The first straight portion 102 and the second straight portion 106 extend from the main body portion 110 in the same direction. That is, the inlet 103 and the outlet 107 open in the same direction. The main body portion 110 has a third flow path 111 for the flow of incompressible fluid. The third flow path 111 is connected to the first flow path 104 and the second flow path 108. That is, the third flow path 111 is connected to the inlet 103 and the outlet 107. The third flow path 111 is an example of a flow path. The main body 110 is formed in a spiral shape. However, the shape of the main body 110 is not limited to a spiral shape.

[0032] like Figure 3 As shown, casting 140 includes a tube 100 and a metal material 120 for inlaying the tube 100. The tube 100 is integral with the metal material 120. A portion of the first straight section 102, a portion of the second straight section 106, and the entire body 110 of the tube 100 are covered by the metal material 120. A portion of the first straight section 102, including an inlet 103, and a portion of the second straight section 106, including an outlet 107, are exposed to the outside from the metal material 120. The metal material 120 is, for example, the same metal as the tube 100. Alternatively, the metal material 120 and the tube 100 may be different metals. Casting 140 can be used, for example, as a housing for a drive motor.

[0033] like Figure 1 As shown, mold 20 includes a fixed mold 30 and a movable mold 40 that can access or exit the fixed mold 30. A cavity 31 for forming a portion of casting 140 is formed in the fixed mold 30 (see reference). Figure 7 The fixed mold 30 has a recess 30M that is recessed from the outer surface 30F (the surface opposite to the movable mold 40) toward the cavity 31. A core 41 for forming another part of the casting 140 is formed in the movable mold 40 (see reference). Figure 7 When the movable mold 40 approaches the fixed mold 30 and closes the mold 20, a molding space 50 is formed by the movable mold 40 and the fixed mold 30 (see reference). Figure 7 A tube 100 is provided in the molding space 50. The molding space 50 is divided by a cavity 31 and a core 41.

[0034] like Figure 4 As shown, the fixed mold 30 includes a first retaining portion 32 of a first straight portion 102 of a retaining tube 100 and a second retaining portion 36 of a second straight portion 106 of a retaining tube 100. The first retaining portion 32 and the second retaining portion 36 are through holes formed in the fixed mold 30. The first retaining portion 32 and the second retaining portion 36 communicate with the recess 30M.

[0035] like Figure 5 As shown, the first straight portion 102 is inserted into the first holding portion 32. The inner diameter of the first holding portion 32 and the outer diameter of the first straight portion 102 are set such that, with the first straight portion 102 inserted into the first holding portion 32, the first straight portion 102 is held in the first holding portion 32 without any wobbling between the first straight portion 102 and the first holding portion 32. The inner diameter of the first holding portion 32 is approximately the same as the outer diameter of the first straight portion 102. The length of the first holding portion 32 in the longitudinal direction is set such that, with the first straight portion 102 held in the first holding portion 32, the first straight portion 102 protrudes outward from the mold 20 (here, the fixed mold 30). The length of the first holding portion 32 in the longitudinal direction is shorter than the length of the first straight portion 102 in the longitudinal direction. With the first straight portion 102 inserted into the first holding portion 32 (i.e., when the tube 100 is disposed in the molding space 50), a portion of the first straight portion 102 protrudes outward from the mold 20 (here, the fixed mold 30). That is, the injection port 103 is exposed to the outside of the fixed mold 30. The injection port 103 is located inside the recess 30M of the fixed mold 30. Alternatively, the injection port 103 may be located outside the recess 30M.

[0036] like Figure 5As shown, the second straight section 106 is inserted into the second holding section 36. The inner diameter of the second holding section 36 and the outer diameter of the second straight section 106 are set such that, when the second straight section 106 is inserted into the second holding section 36, the second straight section 106 is held in the second holding section 36 without any wobbling between the second straight section 106 and the second holding section 36. The inner diameter of the second holding section 36 is approximately the same as the outer diameter of the second straight section 106. The length of the second holding section 36 in the longitudinal direction is set such that, when the second straight section 106 is held in the second holding section 36, the second straight section 106 protrudes outward from the mold 20 (here, the fixed mold 30). The length of the second holding section 36 in the longitudinal direction is shorter than the length of the second straight section 106 in the longitudinal direction. When the second straight section 106 is inserted into the second holding section 36 (i.e., when the tube 100 is disposed in the molding space 50), a portion of the second straight section 106 protrudes outward from the mold 20 (here, the fixed mold 30). That is, the outlet 107 is exposed to the outside of the fixed mold 30. The outlet 107 is located within the recess 30M of the fixed mold 30. Alternatively, the outlet 107 may be located further outward than the recess 30M. It should be noted that the first straight portion 102 and the second straight portion 106 may not be exposed to the outside of the mold 20 (here, the fixed mold 30). In this case, for example, incompressible fluid may be injected into the inlet 103 of the tube 100 via the first retaining portion 32 and discharged from the outlet 107 of the tube 100 via the second retaining portion 36.

[0037] like Figure 5 As shown, with the first straight portion 102 of the tube 100 held in the first holding portion 32 and the second straight portion 106 held in the second holding portion 36, the tube 100 is held in the fixed mold 30. That is, the tube 100 is held in the fixed mold 30 only by the first holding portion 32 and the second holding portion 36. With the first straight portion 102 of the tube 100 held in the first holding portion 32 and the second straight portion 106 held in the second holding portion 36, the main body portion 110 of the tube 100 does not contact the fixed mold 30 and the movable mold 40 (see reference). Figure 7 In other words, a gap is provided between the main body 110 of the tube 100 and the fixed mold 30 and the movable mold 40. That is, the tube 100 is held in the fixed mold 30 with the main body 110 suspended in the air. Furthermore, in this embodiment, the first holding part 32 and the second holding part 36 are provided in the fixed mold 30, but they may also be provided in the movable mold 40.

[0038] like Figure 1As shown, the fixed mold 30 includes a first pressing portion 38 that presses down on the first straight portion 102 of the tube 100 from the side, and a second pressing portion 39 that presses down on the second straight portion 106 of the tube 100 from the side. The first pressing portion 38 and the second pressing portion 39 are, for example, rod-shaped components. The first pressing portion 38 is configured to be received in and move within a first receiving hole 32H formed in the fixed mold 30. The first receiving hole 32H extends in a direction intersecting (e.g., orthogonal) to the first holding portion 32. The second pressing portion 39 is configured to be received in and move within a second receiving hole 36H formed in the fixed mold 30. The second receiving hole 36H extends in a direction intersecting (e.g., orthogonal) to the second holding portion 36. The first pressing portion 38 and the second pressing portion 39 are configured to press down on the first straight portion 102 and the second straight portion 106 from the side, respectively, after the tube 100 is filled with an incompressible fluid. Furthermore, the first pressing part 38 and the second pressing part 39 can also be configured to press the first straight section 102 and the second straight section 106 from the side, respectively, before filling the tube 100 with incompressible fluid. The first pressing part 38 and the second pressing part 39 are controlled to move by, for example, a solenoid (not shown). The first pressing part 38 fixes the first straight section 102 in a predetermined position by pressing it from the side. The second pressing part 39 fixes the second straight section 106 in a predetermined position by pressing it from the side. In this embodiment, the first pressing part 38 and the second pressing part 39 are provided in the fixed mold 30, but if the movable mold 40 is provided with the first holding part 32 and the second holding part 36, they can also be provided in the movable mold 40. Alternatively, only at least one of the first pressing part 38 and the second pressing part 39 may be provided.

[0039] like Figure 7 As shown, the mold 20 includes a sliding portion 35. The sliding portion 35 is part of the fixed mold 30. The sliding portion 35 is a component that is inserted into the spiral portion of the main body 110 of the tube 100 disposed in the molding space 50. The sliding portion 35 has a cylindrical shape. The sliding portion 35 does not contact the main body 110. The sliding portion 35 is configured to be movable relative to the tube 100.

[0040] like Figure 1 As shown, the fluid delivery device 80 is a separate device from the mold 20. The fluid delivery device 80 is a device for injecting an incompressible fluid into the inlet 103 of the pipe 100. The fluid delivery device 80 is also a device for discharging and recovering the incompressible fluid from the outlet 107 of the pipe 100. The incompressible fluid is not particularly limited to any fluid that, by filling the interior of the pipe 100, suppresses deformation of the pipe 100 even when a load is applied. An example of an incompressible fluid is oil (e.g., working oil). The fluid delivery device 80 is installed in the molding space 50 of the mold 20 (see reference 100). Figure 7 The pipe 100 is configured with an inlet 103 and an outlet 107. The fluid conveying device 80 includes a conveying section 82 for discharging incompressible fluid and a recovery section 84 for recovering incompressible fluid. The conveying section 82 and the recovery section 84 are, for example, flexible hoses with pressure resistance and heat resistance. The conveying section 82 is installed on the first straight section 102 of the pipe 100. The conveying section 82 communicates with the inlet 103 of the first straight section 102. The recovery section 84 is installed on the second straight section 106 of the pipe 100. The recovery section 84 communicates with the outlet 107 of the second straight section 106. Furthermore, the method of installing the conveying section 82 on the first straight section 102 and the method of installing the recovery section 84 on the second straight section 106 are not particularly limited. For example, they can also be installed and removed using a connector (one-touch joint) or the like.

[0041] Next, the manufacturing method of the casting 140 of this embodiment will be described. Figure 6 This is a flowchart illustrating a method for manufacturing casting 140 (hereinafter referred to as the manufacturing method). Figure 6 As shown, the manufacturing method includes a preparation step (step S10), a configuration step (step S20), a mold closing step (step S30), a first filling step (step S40), a second filling step (step S50), an ejection step (step S60), and a disassembly step (step S70). Here, as... Figure 1 As shown, casting 140 is manufactured using a casting manufacturing apparatus 10 equipped with a mold 20 and a fluid conveying device 80 (see reference). Figure 3 Additionally, in Figures 7-10 In this context, the direction in which the movable mold 40 moves relative to the fixed mold 30 is defined as the mold movement direction P, the direction in which the movable mold 40 approaches the fixed mold 30 is defined as P1, and the direction in which the movable mold 40 moves away from the fixed mold 30 is defined as P2.

[0042] First, in the preparation process (step S10), such as Figure 1 As shown, a mold 20 is prepared, comprising a fixed mold 30 and a movable mold 40 that can approach or move away from the fixed mold 30.

[0043] Next, in the configuration process (step S20), the tube 100 is configured within the mold 20. More specifically, as... Figure 5 As shown, the first straight portion 102 of the tube 100 is inserted into the first holding portion 32 of the fixed mold 30 and held therein, and the second straight portion 106 of the tube 100 is inserted into the second holding portion 36 of the fixed mold 30 and held therein. Thus, the injection port 103 of the first straight portion 102 and the discharge port 107 of the second straight portion 106 are exposed to the outside of the mold 20 (here, the fixed mold 30) (see reference). Figure 1 ).

[0044] Next, in the mold closing process (step S30), as follows: Figure 7 As shown, the movable mold 40 is brought close to the fixed mold 30, thus closing the mold 20. That is, the movable mold 40 is moved towards... Figure 7 The movable mold 40 moves in the direction of arrow P1, closing the fixed mold 30. Thus, the molding space 50 of the molded casting 140 is divided by the cavity 31 of the fixed mold 30 and the core 41 of the movable mold 40. Furthermore, before bringing the movable mold 40 close to the fixed mold 30, the sliding portion 35 of the mold 20 (also see...) Figure 1 The tube 100 is moved and positioned within the main body 110 of the tube 100. When the mold 20 is closed, the main body 110 of the tube 100 does not contact the fixed mold 30 or the movable mold 40. Only the first straight portion 102 and the second straight portion 106 of the tube 100 contact the mold 20 (here, the fixed mold 30).

[0045] Next, in the first filling process (step S40), an incompressible fluid (e.g., oil) is injected through the injection port 103 of the first straight section 102 to fill the third flow path 111 of the main body section 110 with the incompressible fluid. More specifically, as Figure 8 As shown, the conveying section 82 of the fluid conveying device 80 is installed on the first straight section 102 of the pipe 100 via a one-touch connector or the like, and the recovery section 84 of the fluid conveying device 80 is installed on the second straight section 106 of the pipe 100 via a one-touch connector or the like. Furthermore, incompressible fluid is filled into the first flow path 104, the second flow path 108, and the third flow path 111 of the pipe 100 from the fluid conveying device 80 via the injection port 103. After the incompressible fluid filling is completed, the fluid conveying device 80 can be removed from the pipe 100 or left installed. Additionally, after the incompressible fluid filling is completed, the first pressing part 38 presses the first straight section 102 of the pipe 100 from the side, and the second pressing part 39 presses the second straight section 106 of the pipe 100 from the side, thereby fixing the first straight section 102 and the second straight section 106 in a predetermined position. In addition, in this embodiment, the first filling process (step S40) is performed after the mold closing process (step S30), but the mold closing process (step S30) may also be performed after the first filling process (step S40).

[0046] Next, in the second filling step S50, molten metal material is filled into the molding space 50 formed by the movable mold 40 and the fixed mold 30. For example, an aluminum alloy can be used as the metal material. Furthermore, the molten metal material (molten liquid) is filled into the molding space 50 through an injection port (not shown) provided in the fixed mold 30. 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.

[0047] Next, in the discharge process (step S60), incompressible fluid filling the third flow path 111 of the main body 110 is discharged from the discharge port 107 of the second straight section 106 of the casting 140. More specifically, as Figure 9 As shown, the fluid conveying device 80 is driven to discharge incompressible fluid from the outlet 107 of the second straight section 106 of the pipe 100 to the fluid conveying device 80. The incompressible fluid discharged from the outlet 107 is recovered by the fluid conveying device 80. After the incompressible fluid is discharged from the pipe 100, the fluid conveying device 80 is removed from the pipe 100. The discharge process (step S60) is performed with the casting 140 disposed in the mold 20. It should be noted that the discharge process (step S60) can be performed after the molten liquid in the mold 20 has completely solidified, or it can be performed midway through the solidification process. That is, the discharge of the incompressible fluid can begin after the solidification time (the time required for cooling to solidify the molten liquid) has elapsed, or it can begin before the solidification time has elapsed.

[0048] Next, in the removal process (step S70), as follows: Figure 10 As shown, the movable mold 40 is moved away from the fixed mold 30 to open the mold 20. That is, the movable mold 40 is moved towards... Figure 10 The movable mold 40 moves in the direction of arrow P2, causing it to move away from the fixed mold 30. At this time, the formed casting 140 is fixed to the movable mold 40. Furthermore, a core pin (not shown) is pressed against the casting 140 fixed to the movable mold 40, and the casting 140 from which incompressible fluid has been discharged from the third flow path 111 of the main body 110 of the pipe 100 is removed from the movable mold 40. Thus, the casting 140, comprising the pipe 100 and the metal material 120 of the inlaid pipe 100, is molded.

[0049] As described above, according to the manufacturing method of this embodiment, an incompressible fluid is injected through the injection port 103 while the tube 100 is disposed in the mold 20. After molten metal material is filled into the molding space 50, the incompressible fluid is discharged from the discharge port 107 while the tube 100 is disposed within the mold 20. Thus, with the casting 140 present within the mold 20, the incompressible fluid filling the third flow path 111 of the main body 110 of the tube 100 is discharged from the discharge port 107. Therefore, it is unnecessary to install the casting 140 in a device for removing the incompressible fluid, thereby shortening the manufacturing time of the casting 140. Furthermore, when the casting 140 is removed from the mold 20 while the third flow path 111 of the main body 110 of the tube 100 is filled with incompressible fluid, the incompressible fluid may scatter outwards from the injection port 103 or the discharge port 107 of the tube 100. However, according to the above manufacturing method, when the casting 140 is removed from the mold 20, the incompressible fluid is discharged, so the incompressible fluid will not fly outward.

[0050] Furthermore, according to the casting manufacturing apparatus 10 of this embodiment, the fluid delivery device 80, installed at the injection port 103 and the discharge port 107 of the pipe 100 disposed in the molding space 50, injects incompressible fluid from the injection port 103 and discharges incompressible fluid from the discharge port 107. Thus, with the pipe 100 disposed within the mold 20, the incompressible fluid can be discharged from the discharge port 107 of the pipe 100, eliminating the need for a device for removing the incompressible fluid and shortening the manufacturing time of the casting 140. Additionally, the relative positional relationship between the fluid delivery device 80 and the mold 20 remains unchanged when the incompressible fluid is injected from the injection port 103 and discharged from the discharge port 107, enabling highly precise injection and discharge of the incompressible fluid.

[0051] Furthermore, according to the mold 20 of this embodiment, the main body 110 of the tube 100 is not in contact with the fixed mold 30 and the movable mold 40 when the first straight portion 102 of the tube 100 is held by the first holding portion 32 and the second straight portion 106 is held by the second holding portion 36. Therefore, when molten metal material is filled into the molding space 50, the metal material will be embedded in the entire main body 110 of the tube 100. That is, in the manufactured casting 140, the main body 110 of the tube 100 is not exposed to the outside.

[0052] In the mold 20 of this embodiment, the lengths of the first holding portion 32 and the second holding portion 36 are set such that, with the first straight portion 102 of the tube 100 held by the first holding portion 32 and the second straight portion 106 held by the second holding portion 36, the first straight portion 102 and the second straight portion 106 protrude from the mold 20 to the outside. According to the above method, the fluid conveying device 80 can be easily installed on the first straight portion 102 and the second straight portion 106 that protrude from the mold 20 to the outside.

[0053] In the mold 20 of this embodiment, the fixing mold 30, which includes a first holding portion 32 and a second holding portion 36, has a first pressing portion 38 that presses the first straight portion 102 from the side and a second pressing portion 39 that presses the second straight portion 106 from the side. According to the above method, the first straight portion 102 and / or the second straight portion 106 of the tube 100 can be fixed in a predetermined position.

[0054] 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.

[0055] Explanation of reference numerals in the attached figures

[0056] 10 Casting Manufacturing Equipment

[0057] 20 molds

[0058] 30 fixed mold

[0059] 32 First Maintenance Section

[0060] 36 Second Maintenance Section

[0061] 38 First pressing part

[0062] 39 Second pressing part

[0063] 40 movable models

[0064] 50 molding space

[0065] 80 fluid transport device

[0066] 82 Conveying Department

[0067] 84 Recycling Department

[0068] 100 tubes

[0069] 102 First Straight Section

[0070] 103 Injection Port

[0071] 104 first flow path

[0072] 106 Second Straight Section

[0073] 107 discharge outlet

[0074] 108 Second Flow Path

[0075] 110 Main Body

[0076] 111 Third flow path (flow path)

[0077] 120 Metal Materials

[0078] 140 castings.

Claims

1. A manufacturing method for manufacturing castings, The casting has the following features: The tube has an inlet for injecting an incompressible fluid, an outlet for discharging an incompressible fluid, and a flow path located between the inlet and the outlet for allowing the incompressible fluid to flow. as well as Metal material, inlaid in the tube, The manufacturing method includes: The preparation process involves preparing a mold that includes a fixed mold and a movable mold that can approach or move away from the fixed mold. The configuration process involves configuring the tube within the mold; The mold closing process involves bringing the movable mold close to the fixed mold to close the mold. The first filling step involves injecting incompressible fluid into the injection port to fill the flow path with incompressible fluid. The second filling process involves filling the molding space formed by the movable mold and the fixed mold with molten metal material. The discharge process involves discharging the incompressible fluid filling the flow path from the discharge port; and The removal process involves moving the movable mold away from the fixed mold to open the mold, and removing the casting from the flow path where incompressible fluid has been discharged.

2. A casting manufacturing apparatus, comprising: A mold, comprising a fixed mold and a movable mold capable of approaching or moving away from the fixed mold, the mold being configured such that a tube having a first straight portion, a second straight portion, and a main body is disposed within a molding space formed by the movable mold and the fixed mold, the first straight portion having an inlet for injecting an incompressible fluid, the second straight portion having an outlet for discharging the incompressible fluid, and the main body being located between the first straight portion and the second straight portion and having a flow path for the incompressible fluid to pass through; and A fluid delivery device is installed at the inlet and outlet of the tube disposed in the molding space, for injecting incompressible fluid from the inlet and discharging incompressible fluid from the outlet. The mold includes: a first holding portion for inserting and holding the first straight portion, and a second holding portion for inserting and holding the second straight portion. The fixed mold or the movable mold having the first holding portion and the second holding portion has at least one of a first pressing portion and a second pressing portion. The first pressing portion is received in a first receiving hole extending in a direction intersecting the first holding portion and moves within the first receiving hole to press the first straight portion from the side. The second pressing portion is received in a second receiving hole extending in a direction intersecting the second holding portion and moves within the second receiving hole to press the second straight portion from the side.

3. A mold comprising a fixed mold and a movable mold accessible to or away from the fixed mold, the mold being configured such that a tube having a first straight portion, a second straight portion, and a helical body portion is disposed in a molding space formed by the movable mold and the fixed mold, the first straight portion having an inlet for injecting an incompressible fluid, the second straight portion having an outlet for discharging an incompressible fluid and being parallel to the first straight portion, the body portion being located between the first straight portion and the second straight portion and having a flow path for the incompressible fluid to pass through. The mold includes: a first holding portion for inserting and holding the first straight portion, and a second holding portion for inserting and holding the second straight portion. When the first straight section is held by the first holding section and the second straight section is held by the second holding section, when viewed from the axial direction of the spiral shape, the reverse extension lines of the first straight section and the reverse extension lines of the second straight section both cross the main body.

4. The mold according to claim 3, wherein, The first retaining part and the second retaining part are disposed in the fixed mold or the movable mold.

5. The mold according to claim 3, wherein, When the first straight portion of the tube is held by the first holding portion and the second straight portion is held by the second holding portion, a gap is formed between the main body portion of the tube and the fixed mold and the movable mold.

6. The mold according to claim 3, wherein, The lengths of the first retaining portion and the second retaining portion are set such that, in the state where the first straight portion of the tube is held by the first retaining portion and the second straight portion is held by the second retaining portion, the first straight portion and the second straight portion are exposed to the outside from the mold.

7. The mold according to any one of claims 3 to 6, wherein, The fixed mold or the movable mold having the first holding portion and the second holding portion has at least one of a first pressing portion that presses the first straight portion from the side and a second pressing portion that presses the second straight portion from the side.

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