Disc rotor manufacturing method

Abstract

To manufacture a disc rotor using a latent heat storage material, which has small volumetric change even when it undergoes a phase change, in a sliding part.SOLUTION: A disc rotor manufacturing method comprises: a molding process (S100) for producing a compression molded body by compressing a powder mixture containing a latent heat storage material and metal powder; an arrangement process (S200) for arranging the compression molded body in a mold for casting a disc rotor so that the compression molded body is supported by contacting a support surface, which is a part of an inner surface of a corresponding portion corresponding to a sliding part, and the site of the corresponding portion other than the support surface is separated from the compression molded body; and an injection process (S300) for pouring molten metal into the mold in which the compression molded body is arranged.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a method for manufacturing a disk rotor. [Background technology]

[0002] Patent Document 1 discloses a technology in which a latent heat storage material is embedded inside the disc rotor as a measure against heat generated during braking. This latent heat storage material changes to a solid phase except when the temperature is high, and to a liquid phase when the temperature is high. The disc rotor of Patent Document 1 has a volume change absorption mechanism to absorb the volume change that accompanies the phase change of the latent heat storage material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2011 / 125231 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, if a latent heat storage material that undergoes a large volume change due to a phase change is used, the structure becomes complicated and the cost increases. In response to this, it is possible to use a latent heat storage material that undergoes a small volume change due to a phase change in the sliding portion of the disk rotor. However, the use of a latent heat storage material that undergoes a small volume change due to a phase change in the sliding portion of the disk rotor has not been fully considered. An object of one aspect of the present disclosure is to provide a method for manufacturing a disk rotor in which a sliding portion uses a latent heat storage material that undergoes a small volumetric change even when it undergoes a phase change. [Means for solving the problem]

[0005] In order to solve the above problems, a disc rotor manufacturing method according to one embodiment of the present disclosure is a manufacturing method for a disc rotor having a sliding part that can slide against a friction material, and includes a molding process of creating a compression molded body by compressing a mixed powder containing a latent heat storage material and a metal powder, a placement process of placing the compression molded body in the disc rotor casting mold so that a support surface that is a part of the inner surface of a corresponding part of the disc rotor casting mold that corresponds to the sliding part abuts against the compression molded body, and the corresponding part other than the support surface is separated from the compression molded body, and an injection process of pouring molten metal into the disc rotor casting mold in which the compression molded body has been placed by the placement process. In addition, in order to solve the above problems, a manufacturing method of a disc rotor according to another embodiment of the present disclosure is a manufacturing method of a disc rotor including a molding step of compressing a mixed powder containing a latent heat storage material and a metal powder to create a compression molded body, an attachment step of attaching the compression molded body to a core, an arrangement step of placing the core to which the compression molded body is attached inside a mold for casting a disc rotor, and an injection step of pouring molten metal between the core to which the compression molded body is attached and the mold for casting a disc rotor, wherein in the attachment step, the compression molded body is attached to the core with a portion of the compression molded body protruding toward the inner surface of the mold for casting a disc rotor, and in the arrangement step, the compression molded body is positioned in the mold for casting a disc rotor by the portion of the compression molded body protruding from the core. Effect of the Invention

[0006] According to one aspect of the present disclosure, it is possible to manufacture a disk rotor in which a latent heat storage material that undergoes a small volume change even when it undergoes a phase change is used in a sliding portion. [Brief description of the drawings]

[0007] [Figure 1] 1A to 1C are diagrams illustrating an example of a disk rotor manufactured by the disk rotor manufacturing method according to a first embodiment of the present disclosure. [Diagram 2]1 is a diagram showing an example of a configuration of a metal composite material used in a compression-molded body of a disk rotor manufactured by the disk rotor manufacturing method according to the first embodiment of the present disclosure. FIG. [Diagram 3] 4 is a flowchart illustrating a disk rotor manufacturing method according to the first embodiment of the present disclosure. [Figure 4] 2 is a schematic diagram used to explain a molding step included in the disk rotor manufacturing method according to the first embodiment of the present disclosure. FIG. [Diagram 5] 2 is a schematic diagram used to explain an arrangement step included in the disk rotor manufacturing method according to the first embodiment of the present disclosure. FIG. [Figure 6] 11A to 11C are diagrams illustrating an example of a disk rotor manufactured by a disk rotor manufacturing method according to a second embodiment of the present disclosure. [Figure 7] 11 is a schematic diagram used to explain an arrangement step included in a disk rotor manufacturing method according to a second embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Embodiment 1] (Disc rotor) Fig. 1 is a diagram showing an example of a disc rotor manufactured by a disc rotor manufacturing method according to embodiment 1 of the present disclosure. The disc rotor 1 shown in Fig. 1 is a ventilated disc type disc rotor. Fig. 1(a) shows a plan view of the ventilated disc type disc rotor manufactured by the disc rotor manufacturing method according to embodiment 1 of the present disclosure. Fig. 1(b) is a schematic diagram showing the AA cross section of the disc rotor shown in (a).

[0009] A disc rotor 1 shown in Fig. 1 is disposed, for example, on a wheel of a vehicle (not shown) and rotates integrally with the wheel. As shown in Fig. 1(a), the disc rotor 1 has a sliding portion 10 and a hat portion 11. The sliding portion 10 has sliding surfaces 10a and 10b. The sliding surfaces 10a and 10b are, for example, circular.

[0010] When the disc rotor 1 is placed on a wheel of a vehicle (not shown), the sliding surfaces 10a and 10b come into frictional contact with a friction member of a caliper provided on the wheel, generating a braking force on the wheel. The hat portion 11 is a mounting portion for mounting on the wheel of the vehicle. As shown in FIG. 1(b), the hat portion 11 has a cylindrical shape and protrudes from the sliding surface 10a. The hat portion 11 has a hole 12 through which the rotation shaft of the wheel of the vehicle passes.

[0011] The hat portion 11 of the disc rotor 1 is made of, for example, cast iron. The sliding part 10 of the disk rotor 1 has a surface base 14 made of cast iron, for example, and a compression molded body 13 encapsulated in the surface base 14. The compression molded body 13 is made of a metal composite material that has a latent heat storage capacity and has a small volume change even when the solid phase changes to liquid phase even when the temperature becomes high during use of the disk rotor 1. The disk rotor 1 may be heated to nearly 800 degrees due to the sliding of the friction member of the caliper against the sliding part 10. The metal composite material used for the compression molded body 13 contains a dispersed latent heat storage material that has a small volume change even when the solid phase changes to liquid phase within the temperature range estimated to be reached by the sliding of the friction member of the caliper against the sliding part 10, that is, the operating temperature range of the disk rotor. As such a latent heat storage material, h-MEPCM (Micro-Encapsulated Phase Change Material manufactured by Hokkaido University) is considered.

[0012] FIG. 2 is a diagram showing an example of a metal composite material used in the compression molded body of the disk rotor manufactured by the disk rotor manufacturing method according to the first embodiment of the present disclosure. The compression molded body 13 shown in FIG. 2 has a structure in which a latent heat storage material particle-wetness improving particle composite 130, which is a composite of a latent heat storage material granule 131 and a wetting improving particle 132, is dispersed in cast iron (metal matrix) 134. In the latent heat storage material particle-wetness improving particle composite 130, the wetting improving particle 132 is bonded (fixed) to the surface of the latent heat storage material particle granule 131 via a binder 133. The granule 131 may be, for example, an alloy-based PCM (Phase Change Material) such as an Al-Si alloy. The binder 133 may be, for example, a phenolic resin.

[0013] As shown in FIG. 1, the compression molded body 13 is smaller than the sliding part 10 of the disk rotor 1. The compression molded body 13 has a parallel surface 13c parallel to the sliding surfaces 10a and 10b of the sliding part 10. The parallel surface 13c has a disk shape with a hole in the center. As shown in FIG. 1(b), the compression molded body 13 has a protrusion 13a protruding from the parallel surface 13c parallel to the sliding surface 10a of the sliding part 10. The compression molded body 13 has a protrusion 13b protruding from the parallel surface 13c parallel to the sliding surface 10b of the sliding part 10.

[0014] 1(a), the protrusion 13a is exposed from the surface matrix 14 in a plan view. On the other hand, the parallel surface 13c is not exposed from the surface matrix 14 in a plan view. The protrusion 13a is part of a ring concentric with the sliding surface 10a, and does not surround the entire circumference of the hat portion 11 in a plan view. Similarly, the protrusion 13b is exposed from the surface matrix 14 in a plan view. On the other hand, the parallel surface 13c is not exposed from the surface matrix 14 in a plan view. Although not shown in Fig. 1(a), the protrusion 13b is part of a ring concentric with the sliding surface 10b, and does not surround the entire circumference of the hat portion 11 in a plan view. The protrusions 13a and 13b are provided at a position close to the hat portion 11. More specifically, they are preferably provided at a position where they do not slide against a friction member (not shown) of a caliper when the disc rotor 1 is placed on a vehicle wheel.

[0015] 3 is a flowchart illustrating a disk rotor manufacturing method according to the first embodiment of the present disclosure. As shown in FIG. 3, the disk rotor manufacturing method according to the first embodiment of the present disclosure includes a molding step S100, a placement step S200, an injection step S300, and an acquisition step S400.

[0016] (molding process) In the molding step S100, a compression-molded body 13 is produced by compressing a mixed powder containing a latent heat storage material and a metal powder. 4 is a schematic diagram used to explain the molding process included in the disk rotor manufacturing method according to the first embodiment of the present disclosure. In the molding process S100, a mixed powder containing a latent heat storage material and a metal powder is compressed to produce a compression molded body 13. Specifically, a mixed powder containing h-MEPCM and cast iron powder is placed between dies 31a and 31b, and pressure is applied to the mixed powder by the dies 31a and 31b. At this time, dies 32a and 32b are placed on the side surfaces of the dies 31a and 31b. Pressure is applied to the dies 32a and 32b to prevent the mixed powder from ejecting from between the dies 31a and 31b.

[0017] (Placement process) 5 is a schematic diagram used to explain the arrangement step included in the disk rotor manufacturing method according to the first embodiment of the present disclosure. The mold 51 shown in FIG. 5 has an upper main mold 51a and a lower main mold 51b. The upper main mold 51a has an inlet 51c. The lower main mold 51b has a step 51d at a position where the core 52 is arranged. Between the upper main mold 51a and the lower main mold 51b, there are a first portion 51e which is a portion corresponding to the sliding portion 10 of the disk rotor 1, and a second portion 51f which corresponds to the hat portion 11 of the disk rotor 1. The first portion 51e is an example of a corresponding portion.

[0018] The core 52 has a portion 52b for forming the hole 12 of the disc rotor 1. The portion 52b has, for example, a cylindrical shape centered on the central axis 52a. The portion 52b of the core 52 is located on the portion 52c of the core 52. The portion 52c has a cylindrical shape centered on the central axis 52a and extends from the bottom surface of the step 51d of the lower main mold 51b to the bottom surface of the portion 52b. The portion 52c is formed so that no gap is generated between the portion 52c and the step 51d. An arm portion 52d extends radially from the side surface of the portion 52c of the core 52. When the core 52 is placed on the step 51d of the lower main mold 51b, the upper surface 60 of the arm portion 52d faces the inner surface of the upper main mold 51a, and the lower surface 61 of the arm portion 52d faces the inner surface of the lower main mold 51b.

[0019] In the arrangement step S200, the compression molded body 13 is arranged inside the mold 51. In the arrangement step S200 of the first embodiment, an attachment step is performed to attach the compression molded body 13 to the arm portion 52d of the core 52. In the example of FIG. 5, the compression molded body 13 having the protrusion 13a is attached to the upper surface 60 of the arm portion 52d of the core 52, and the compression molded body 13 having the protrusion 13b is attached to the lower surface 61 of the arm portion 52d of the core 52. As described above, the compression molded body 13 has a disk shape with a hole in the center. The portion 52c of the core 52 has the same shape as the hole 13d in the center of the compression molded body 13. Therefore, the compression molded body 13 attached to the arm portion 52d of the core 52 does not shift in position in the radial direction of the portion 52c of the core 52.

[0020] In the arrangement step S200, the core 52 with the compression molded body 13 attached to the arm 52d is arranged on the step 51d of the lower main mold 51b. At this time, the protrusion 13a of the compression molded body 13 abuts against the inner surface of the upper main mold 51a, and the protrusion 13b abuts against the inner surface of the lower main mold 51b. As a result, the compression molded body 13 having the protrusion 13a is sandwiched between the upper main mold 51a and the arm 52d, and the compression molded body 13 having the protrusion 13b is sandwiched between the lower main mold 51b and the arm 52d. As a result, the compression molded body 13 attached to the arm 52d of the core 52 does not shift in position in the axial direction of the core 52 parallel to the central axis 52a.

[0021] When core 52 with compression molded body 13 attached to arm portion 52d is placed on step 51d of lower main mold 51b, compression molded body 13, except for protrusions 13a and 13b, is separated from the inner surface of mold 51. Therefore, a gap 70 is secured between core 52 with compression molded body 13 attached and upper main mold 51a, and a gap 71 is secured between core 52 with compression molded body 13 attached and lower main mold 51b.

[0022] In the pouring step S300, molten metal such as cast iron is poured into the inlet 51c of the upper main mold 51a. The molten metal poured into the inlet 51c flows into the gaps 70 and 71. The molten metal that has flowed into the gaps 70 and 71 forms the surface base 14. In this way, the disk rotor 1 is cast.

[0023] 1(a), in a plan view, the protrusions 13a and 13b of the compression molded body 13 do not entirely surround the portion 52c of the core 52. Therefore, the molten metal poured from the inlet 51c flows into the space between the protrusion 13a and the portion 52c of the core 52, between the protrusion 13b and the portion 52c of the core 52, and into the second portion 51f.

[0024] (Acquisition process) In the obtaining step S400, the cast disc rotor 1 is obtained from the mold 51. At this time, at least the core 52 is crushed.

[0025] [Embodiment 2] Other embodiments of the present disclosure will be described below. For convenience of explanation, the same reference numerals will be given to members having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0026] FIG. 6 is a diagram showing an example of a disk rotor manufactured by a disk rotor manufacturing method according to the second embodiment of the present disclosure. The disk rotor 2 shown in FIG. 6 is a solid disk type disk rotor. As shown in FIG. 6, the disk rotor 2 has a sliding portion 20 and a hat portion 11. The sliding portion 20 has sliding surfaces 20a and 20b. The sliding surfaces 20a and 20b are, for example, circular. The sliding portion 20 of the disk rotor 2 has a surface base 24 formed of, for example, cast iron, and a compression molded body 23 contained in the surface base 24. The compression molded body 23 of the second embodiment is different from the compression molded body 13 of the first embodiment in that it does not have the protrusions 13a and 13b. The compression molded body 23 is parallel to the sliding surfaces 20a and 20b of the sliding portion 20 and has a disk shape with a hole in the center. The compression molded body 23 is made of a metal composite material that does not easily change from a solid phase to a liquid phase, has a small volume change due to phase change, and has latent heat storage capacity even when the disk rotor 2 is heated to high temperatures during use. For example, the compression molded body 23 is made of a metal composite material in which h-MEPCM (Micro-Encapsulated Phase Change Material made by Hokkaido University) is dispersed in cast iron. As shown in FIG. 6, in the sliding portion 20 of the disk rotor 2, a portion 23a (hereinafter, exposed portion 23a) of the compression molded body 23 is exposed at an edge portion 24a of a surface base 24 on the sliding surface 20a side.

[0027] Fig. 7 is a schematic diagram used to explain an arrangement step included in a disc rotor manufacturing method according to embodiment 2 of the present disclosure. Fig. 7(a) shows a mold 80 used in manufacturing a disc rotor 2. Fig. 7(b) is a schematic diagram showing a BB cross section of Fig. 7(a). The mold 80 shown in Fig. 7(a) has an upper main mold 81a and a lower main mold 81b. Unlike the lower main mold 51b of the mold 51, the lower main mold 81b of the mold 80 does not have a core 52 arranged therein.

[0028] Between the upper main mold 81a and the lower main mold 81b, there are a first portion 81c which is a portion corresponding to the sliding portion 20 of the disc rotor 2, and a second portion 81d which corresponds to the hat portion 11 of the disc rotor 2. The first portion 81c is an example of a corresponding portion. As shown in (a) of Fig. 7, the lower main mold 81b of the mold 80 has a support portion 81e on a part of the outer edge of the first portion 81c.

[0029] In the arrangement step S200, the compression molded body 23 is arranged on the support portion 81e of the lower main mold 81b. As shown in FIG. 7B, the compression molded body 23 has a hole 23b in the center. When the compression molded body 23 is arranged on the support portion 81e of the lower main mold 81b, the edge of the hole 23b of the compression molded body 23 abuts against the lower main mold 81b. As shown in FIG. 7A, when the compression molded body 23 is arranged on the support portion 81e of the lower main mold 81b, the portion of the compression molded body 23 other than the edge of the hole 23b is separated from the inner surface of the mold 80.

[0030] 7(b), the lower main mold 81b has a plurality of support portions 81e. A gap 82 is provided between each of the support portions 81e. In the pouring step S300, the molten metal flows through the gaps 82 into the first portion 81c and the second portion 81d of the mold 80. In FIG. 7, an inlet for introducing the molten metal into the mold 80 is not shown.

[0031] [Modifications] In the disk rotor manufacturing method according to the first embodiment, the compression molded body 13 having the protrusions 13a and 13b is created in the molding step S100, and the compression molded body 13 is placed inside the mold 51 so that the protrusions 13a and 13b abut against the inner surface of the mold 51 in the placement step S200. However, the method of manufacturing a ventilated disk type disk rotor by the disk rotor manufacturing method according to one embodiment of the present disclosure is not limited to the method according to the first embodiment. For example, the compression molded body 13 may not be provided with the protrusions 13a, and the protrusions may be protruding from a part of the inner surface of the upper main mold 51a and abut against the parallel surface 13c of the compression molded body 13. Also, the compression molded body 13 may not be provided with the protrusions 13b, and the protrusions may be protruding from a part of the inner surface of the lower main mold 51b and abut against the parallel surface 13c of the compression molded body 13 to support the compression molded body 13.

[0032] In the disk rotor manufacturing method according to the above-mentioned embodiment 2, a plurality of support parts 81e are provided on the lower main mold 81b, and the compression molded body 23 is placed on the support parts 81e in the placement step S200. However, the method of manufacturing a solid disk type disk rotor by the disk rotor manufacturing method according to an embodiment of the present disclosure is not limited to the method according to embodiment 2. For example, the support parts 81e may not be provided on the lower main mold 81b, and protrusions may be protruded from the compression molded body 23 toward each of the upper main mold 81a and the lower main mold 81b, and may be brought into contact with each of the upper main mold 81a and the lower main mold 81b.

[0033] 〔summary〕 A disc rotor manufacturing method according to one embodiment of the present disclosure is a manufacturing method for a disc rotor having a sliding part capable of sliding against a friction material, and includes a molding step of creating a compression molded body by compressing a mixed powder containing a latent heat storage material and a metal powder, a placement step of placing the compression molded body in the disc rotor casting mold so that a support surface, which is part of the inner surface of a corresponding portion of the disc rotor casting mold that corresponds to the sliding part, abuts against the compression molded body and the corresponding portion is spaced apart from the support surface, and an injection step of pouring molten metal into the disc rotor casting mold in which the compression molded body has been placed by the placement step. The present disclosure relates to a method for manufacturing a disk rotor in which a latent heat storage material that undergoes a small volumetric change even when it undergoes a phase change is used in a sliding portion. A material containing a latent heat storage material may be used in the sliding part of the disk rotor as a countermeasure against heat generated during braking. If a part containing a latent heat storage material is provided in the sliding part, friction may cause the shell to crack and the latent heat storage material to melt, causing the core material to leak out onto the friction surface, resulting in a decrease in the friction coefficient of the sliding part. If a volume change absorption mechanism is provided to absorb the volume change caused by the phase change of the latent heat storage material in order to solve this problem, the structure of the sliding part becomes complicated. In the manufacturing method of the disk rotor according to one embodiment of the present disclosure, a latent heat storage material that undergoes a small volume change even when it undergoes a phase change within the operating temperature range of the disk rotor is used, and thus a complicated structure such as a volume change absorption mechanism is not required. A disc rotor may have a hat portion in addition to the sliding portion. The hat portion is a portion for mounting the disc rotor to a mounting target such as a vehicle. If the latent heat storage material is present in the metal matrix of the hat portion, the strength tends to be lower than when the latent heat storage material is not present. Therefore, forming the hat portion from a material containing the latent heat storage material is problematic in terms of strength and cost. In a manufacturing method of a disc rotor according to one aspect of the present disclosure, a compression molded body containing the latent heat storage material is made smaller than the sliding portion, and the compression molded body is supported by a part of the inner surface of a corresponding portion of a mold for casting the disc rotor that corresponds to the sliding portion, thereby manufacturing a disc rotor in which the latent heat storage material is not present except in the sliding portion. Therefore, according to the above embodiment, it is possible to manufacture a disk rotor in which a latent heat storage material that undergoes a small volume change even when it undergoes a phase change is used in the sliding portion.

[0034] In a disc rotor manufacturing method according to one aspect of the present disclosure, the placement process includes attaching the compression molded body produced by the molding process to a core, placing the core with the compression molded body attached in the disc rotor casting mold, supporting the compression molded body by the support surface and the core, and placing the compression molded body in the disc rotor casting mold so that the compression molded body is separated from everything except the support surface. According to the above embodiment, even when a core is used to manufacture a disk rotor, the disk rotor can be manufactured using a latent heat storage material, which undergoes only a small volumetric change even when it undergoes a phase change, in the sliding portion.

[0035] A disc rotor manufacturing method according to one aspect of the present disclosure includes a molding step of compressing a mixed powder containing a latent heat storage material and a metal powder to create a compression molded body, an attachment step of attaching the compression molded body to a core, an arrangement step of placing the core with the compression molded body attached inside a disc rotor casting mold, and an injection step of pouring molten metal between the core with the compression molded body attached and the disc rotor casting mold, wherein in the attachment step, the compression molded body is attached to the core with a portion of the compression molded body protruding toward the inner surface of the disc rotor casting mold, and in the arrangement step, the compression molded body is positioned in the disc rotor casting mold by the portion of the compression molded body protruding from the core. The present disclosure relates to a method for manufacturing a disc rotor in which a compression molded body containing a latent heat storage material is integrated with a disc rotor body. Here, in order to integrate the compression molded body with the disk rotor body, it is conceivable to place a core with the compression molded body attached inside a mold for casting the disk rotor, and pour molten metal between the core with the compression molded body attached and the mold for casting the disk rotor. However, such a method for manufacturing a disk rotor has not been fully studied. Therefore, the inventors have studied the above-mentioned method for manufacturing a disk rotor. The inventors have found a problem that the compression molded body is displaced relative to the core when pouring the molten metal as described above. In contrast, in the present disclosure, a part of the compression molded body is protruded from the core, and the compression molded body is positioned in the mold for casting the disc rotor by this protruding part. This makes it possible to prevent the compression molded body from being displaced from the core when the molten metal is poured, and to accurately position the compression molded body in the disc rotor body.

[0036] [Additional Notes] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. [Explanation of symbols]

[0037] 1, 2 disc rotor 10, 20 Sliding part 10a, 10b, 20a sliding surface 11 Hat Club 13, 23 Compression molded body 13a, 13b protrusions 51a, 81a Upper main type 51b, 81b Lower main type 51, 80 Mold 52 Core 81e Support part S100 molding process S200 placement process S300 injection process

Claims

1. A method for manufacturing a disk rotor having a sliding portion capable of sliding against a friction material, comprising the steps of: A molding process for producing a compression molded body by compressing a mixed powder containing a latent heat storage material and a metal powder; a placement step of placing the compression molded body in the mold for casting the disk rotor such that a support surface, which is a part of an inner surface of a corresponding portion of the mold for casting the disk rotor, that corresponds to the sliding portion is abutted against the compression molded body, and the corresponding portion other than the support surface is spaced from the compression molded body; a pouring step of pouring molten metal into the disk rotor casting mold in which the compression molded body has been placed in the placing step.

2. The placing step includes: The compression molded body produced by the molding step is attached to a core, The core to which the compression molded body is attached is placed in the mold for casting the disk rotor. The compression molded body is supported by the support surface and the core, 2. The method for manufacturing a disk rotor according to claim 1, wherein the compression molded body is placed in the mold for casting the disk rotor so that the compression molded body is separated from surfaces other than the support surface.

3. A molding process of compressing a mixed powder containing a latent heat storage material and a metal powder to prepare a compression molded body; a mounting step of mounting the compression molded body to a core; a placement step of placing the core to which the compression molded body is attached inside a mold for casting a disk rotor; and an injection step of pouring molten metal between the core to which the compression molded body is attached and the mold for casting the disk rotor, In the attaching step, the compression molded body is attached to the core in a state in which a portion of the compression molded body protrudes toward an inner surface of the disk rotor casting mold, The method for manufacturing a disk rotor, wherein in the positioning step, the compression molded body is positioned in the mold for casting the disk rotor by a portion of the compression molded body protruding from the core.

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