Mold for integrally molding a resin layer on a metal core of a steering of a moving body, and method for manufacturing a steering of a moving body having a resin layer integrally molded on a metal core

Abstract

To provide a mold for integrally molding a resin layer on a core metal of a steering capable of suppressing the lowering of a tactile feeling caused by the cut mark of a gate.SOLUTION: A mold for integrally molding a resin layer on a core metal of a steering of a moving body includes a hub core metal part connected to a rotating shaft of the moving body, a spoke core metal part connected to the hub core metal part and serving as a skeleton of a spoke of the steering, and a rim core metal part connected to the spoke and serving as a skeleton of a rim gripped by an occupant of the moving body, and the mold includes a spoke molding part for integrally molding the resin layer on the spoke core metal part, a rim molding part for integrally molding the resin layer on the rim core metal part, and a gate for pouring a resin material into the mold, the gate being provided in the spoke molding part out of the spoke molding part and the rim molding part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a mold for integrally molding a resin layer onto a core bar of a steering wheel for a moving body, and a method for manufacturing a steering wheel for a moving body in which a resin layer is integrally molded onto a core bar. [Background technology]

[0002] Patent Document 1 discloses a mold for integrally molding a resin layer onto a core metal of a steering wheel. In such a mold, a gate for injecting resin material is provided on the outer peripheral surface of the ring portion of the steering wheel that is gripped by the occupant. When molding of the resin is completed, a gate residue is formed at the position of the gate. The gate residue is resin that has hardened according to the shape of the gate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-207159 Summary of the Invention [Problem to be solved by the invention]

[0004] Because the ring portion is gripped by the occupant, gate residue adhering to the ring portion must be cut off along the shape of the ring portion. The cut-off marks of the gate residue may deteriorate the tactile sensation of the occupant gripping the steering wheel. This problem is common to steering wheels with grip portions of any shape other than a ring. [Means for solving the problem]

[0005] The present disclosure can be realized in the following forms.

[0006] (1) According to one aspect of the present disclosure, there is provided a mold for integrally molding a resin layer onto a core metal of a steering wheel of a moving body, wherein the core metal has a hub core metal portion that connects to a rotational shaft of the moving body, a spoke core metal portion that connects to the hub core metal portion and forms the framework of spokes of the steering wheel, and a rim core metal portion that connects to the spokes and forms the framework of a rim that is gripped by a passenger of the moving body, and the mold includes spoke molding portions for integrally molding the resin layer onto the spoke core metal portions, a rim molding portion for integrally molding the resin layer onto the rim core metal portion, and a gate for pouring resin material into the mold, the gate being provided in the spoke molding portion out of the spoke molding portions and the rim molding portion. With this mold, the gate is provided in the spoke molding portion of the spoke molding portion, rather than the rim molding portion, so any traces of the gate residue are left on the spokes of the steering wheel. Compared to the rim, the spokes are less likely to come into contact with the driver's hands. This prevents the steering wheel from feeling worse due to traces of the gate residue. (2) The mold of the above aspect may further include a vent for discharging air from the mold, the vent being provided in the spoke molding portion out of the spoke molding portion and the rim molding portion. With this mold, the vent is provided in the spoke molding portion of the spoke molding portion, and therefore the cutout marks of the vent residue are formed on the spokes of the steering wheel. The spokes are less likely to come into contact with the driver's hands than the rim. This prevents the steering wheel from feeling worse due to the cutout marks of the vent residue. (3) In the mold of the above form, the spoke core portion includes a first core portion and a second core portion that are arranged symmetrically with respect to the hub core portion when the core is viewed from the front, the spoke molding portion includes a first molding portion for integrally molding the resin layer onto the first core portion and a second molding portion for integrally molding the resin layer onto the second core portion, and the gate may be provided in the first molding portion and the vent may be provided in the second molding portion. In this mold, the gate is provided in the first molding section and the vent is provided in the second molding section, so the gate and vent are located symmetrically to each other. This reduces the bias in the resin material supplied into the mold compared to when the gate and vent are located asymmetrically, and suppresses variations in the quality of the resin layer from one section to another. (4) In the mold of the above form, a runner may be further provided which is connected to the gate and is a flow path through which the resin material passes, and the runner may have a cross section provided in the upper mold of the mold and which passes above the rim molding section. With this type of mold, the runner has a cross section that is located in the upper mold and passes above the rim molding section, so compared to a configuration in which the cross section is located in the lower mold and passes below the rim molding section, it is possible to prevent the release agent contained in the resin material from accumulating within the cross section. (5) In the mold of the above aspect, a protrusion may be provided in the crossing portion for forming a notch in a gate residue formed by hardening the resin in the crossing portion. According to this type of mold, a protrusion is provided within the cross section, so that when the mold is opened, the gate residue within the cross section can be easily cut using the notch formed by the protrusion. (6) According to another aspect of the present disclosure, there is provided a mold for integrally molding a resin layer onto a core metal of a steering wheel of a vehicle, wherein the core metal has a mount core metal portion that is the skeleton of a mount portion to which a decorative member of the steering wheel is attached, and a rim core metal portion that is connected to the mount core metal portion and is the skeleton of a rim that is gripped by an occupant of the vehicle, and the mold includes a mount molding portion for integrally molding the resin layer onto the mount core metal portion, a rim molding portion for integrally molding the resin layer onto the rim core metal portion, and a gate for pouring a resin material into the mold, the gate being provided on the mount molding portion out of the mount molding portion and the rim molding portion. According to this type of mold, the gate is provided in the mount molding portion of the mount molding portion and the rim molding portion, and therefore, the cut-out marks of the gate residue are formed in the mount portion of the steering wheel. The mount portion is covered and concealed by the decorative member attached. Therefore, the mount portion is less likely to come into contact with the occupant's hands compared to the rim. This prevents the steering wheel from feeling worsened by the cut-out marks of the gate residue. Furthermore, because the mount portion is covered and concealed by the decorative member, it is possible to prevent the design from being impaired by the cut-out marks of the gate residue. (7) The mold of the above aspect may further include a vent for discharging air from the mold, the vent being provided in the mount molding portion out of the mount molding portion and the rim molding portion. According to this type of mold, the vent is provided in the mount molding portion of the mount molding portion, and therefore the cut-out marks of the vent residue are formed in the mount portion of the steering wheel. The mount portion is covered and concealed by the decorative member attached. Therefore, the mount portion is less likely to come into contact with the occupant's hands compared to the rim. This prevents the steering wheel from feeling worsened by the cut-out marks of the vent residue. Furthermore, because the mount portion is covered and concealed by the decorative member, it is possible to prevent the design from being impaired by the cut-out marks of the vent residue.

[0007] The present disclosure can be realized in various forms, such as a method for manufacturing a steering wheel using a mold, or a steering wheel manufactured using a mold. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a mold according to one embodiment of the present disclosure. [Figure 2] FIG. 1 is a perspective view of a molded product in which a resin layer is integrally molded. [Figure 3] FIG. 2 is a cross-sectional view taken along line III-III in FIG. [Figure 4] 10A to 10C are process diagrams illustrating a method for manufacturing a vehicle steering wheel in which a resin layer is integrally molded with a core metal. [Figure 5] FIG. 10 is a front view of a molded product produced by the mold of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] A. First embodiment: <Overall structure> FIG. 1 is a perspective view showing a schematic configuration of a mold 100 according to one embodiment of the present disclosure. FIG. 2 is a perspective view of a molded product 200 in which a resin layer is integrally molded. FIG. 1 shows the mold 100 with a core CM disposed therein. The mold 100 is used to integrally mold a resin layer onto the core CM of a vehicle steering wheel SR. The steering wheel SR in this embodiment includes a hub SR1 that connects to the vehicle's rotating shaft, an annular rim SR2 that is gripped by a vehicle occupant, and a pair of spokes SRL and SRR that connect the hub SR1 and the rim SR2. The steering wheel SR in this embodiment is a circular handle. The core CM is the framework of the steering wheel SR and is made of metal. The core CM includes a hub core portion CM1 that serves as the framework of the hub SR1, a rim core portion CM2 that serves as the framework of the rim SR2, and spoke core portions CM3 that serve as the framework of the spokes SRL and SRR. In this embodiment, the spoke core portion CM3 includes a first core portion CML and a second core portion CMR that are symmetrically positioned relative to the hub core portion CM1 when the core portion CM is viewed from the front. In other words, the first core portion CML and the second core portion CMR are symmetrically positioned relative to each other with respect to a plane that includes the rotation axis and an axis parallel to the front-to-rear direction of the vehicle when the steering wheel SR is attached to the vehicle and the vehicle is traveling straight. Similarly, the spokes SRL and SRR, each having a resin layer formed on the first core portion CML and the second core portion CMR, are also symmetrically positioned relative to each other.

[0010] The X-axis, Y-axis, and Z-axis shown in the figure are axes that indicate directions that intersect with each other. In the following, the direction facing the arrow is referred to as the + direction, and the direction opposite to the + direction is referred to as the - direction.

[0011] <Configuration of mold 100> As shown in FIG. 1, the mold 100 includes a lower mold 110 and an upper mold 120. The core CM is placed in the lower mold 110, and then the upper mold 120 is placed on top of it. With the lower mold 110 and the upper mold 120 placed on top of each other, a resin material is introduced into the mold 100, and a resin layer is integrally molded with the core CM. In this embodiment, no resin layer is provided on the hub core portion CM1. Therefore, when the core CM is placed in the mold 100, the hub core portion CM1 is exposed to the outside. The mold 100 includes a spoke molding portion 150, a rim molding portion 155, a runner 160, a gate 165, and a vent 170.

[0012] The spoke molding section 150 is a flow path for integrally molding a resin layer onto the spoke core member portion CM3. The spoke core member CM3 is disposed inside the spoke molding section 150. In this embodiment, the spoke molding section 150 has a first molding section 150L for integrally molding a resin layer onto the first core member portion CML, and a second molding section 150R for integrally molding a resin layer onto the second core member CMR. When the core member CM is placed in the mold 100, the first molding section 150L and the second molding section 150R are positioned symmetrically to each other with respect to the hub core member portion CM1.

[0013] The rim molding portion 155 is a flow path for integrally molding a resin layer onto the rim core metal portion CM2. The rim core metal portion CM2 is arranged inside the rim molding portion 155. The rim molding portion 155 has an annular external shape. The rim molding portion 155 is connected to the first molding portion 150L and the second molding portion 150R.

[0014] The runner 160 is a flow path for supplying the resin material from the injection device 1. The resin material heated by the injection device 1 is supplied via the runner 160. The runner 160 has a tubular shape. The runner 160 passes over the rim molding section 155 and connects to a gate 165 provided in the first molding section 150L. Details of the runner 160 will be described later.

[0015] The gate 165 is a supply port for pouring the resin material into the mold 100. The gate 165 is connected to the runner 160. Of the spoke molding portion 150 and the rim molding portion 155, the gate 165 is provided in the spoke molding portion 150. In this embodiment, the gate 165 is provided in the first molding portion 150L. Specifically, the gate 165 is provided at the end of the first molding portion 150L that is closer to the rim core portion CM2.

[0016] The vent 170 is a hole for discharging air from within the mold 100. The gate 165 is provided in the spoke molding section 150, out of the spoke molding section 150 and the rim molding section 155. In this embodiment, the vent 170 is provided in the second molding section 150R. Specifically, the vent 170 is provided at the end of the second molding section 150R closer to the rim core section CM2. The gate 165 and the vent 170 can also be said to be provided in positions symmetrical to each other with respect to the hub core section CM1. The resin material is supplied through the gate 165 and passes through the first molding section 150L, ​​the rim molding section 155, and the second molding section 150R in this order while forcing out air from within the mold 100. The resin material branches in the +Y direction and the -Y direction at the connection between the first molding section 150L and the rim molding section 155 as it passes through the rim molding section 155. The air pushed out at this time is discharged from the mold 100 via the vent 170.

[0017] <Removal of gate residue 210 and vent residue 220> The molded product 200 shown in FIG. 2 is formed by hardening the resin poured into the mold 100 shown in FIG. 1. A resin layer is molded on the core metal CM, and a gate residue 210 and a vent residue 220 are also formed. The gate residue 210 is the hardened resin material in the runner 160 and the gate 165. The vent residue 220 is the hardened resin material discharged together with air from the vent 170. Both the gate residue 210 and the vent residue 220 have a tubular external shape. The gate residue 210 and the vent residue 220 are cut off from the base using nippers or the like.

[0018] <Detailed configuration of Runner 160> FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. As shown in FIG. 3, the runner 160 has a supply portion 161 and a crossing portion 162. The supply portion 161 is a flow path provided on the parting line PL, which is the joint between the upper mold 120 and the lower mold 110. The crossing portion 162 is connected to the supply portion 161 and is a flow path that crosses above (in the +Z direction) the rim forming portion 155. The crossing portion 162 is provided in the upper mold 120 and is a V-shaped flow path in the cross section taken along line III-III. The crossing portion 162 also has a protrusion 163 that protrudes toward the rim forming portion 155. As shown in FIG. 2, the protrusion 163 forms a notch 211 in the gate residue 210 that follows the shape of the protrusion 163.

[0019] According to the mold 100 of the first embodiment described above, the gate 165 is provided in the spoke molding portion 150, out of the spoke molding portion 150 and the rim molding portion 155. Therefore, the removal marks of the gate residue 210 are left on the spokes SRL. The spokes SRL are less likely to be touched by the occupant than the rim SR2. Therefore, the deterioration of the tactile feel of the steering wheel SR can be suppressed compared to when the removal marks of the gate residue 210 are left on the rim SR2. Furthermore, if a decorative member such as a bezel is disposed on the spokes SRL, the removal marks can be covered by the decorative member. This suppresses a deterioration in the design and also eliminates the process of smoothing the removal marks.

[0020] Furthermore, according to the mold 100 of the first embodiment, the vent 170 is provided in the spoke molding portion 150, out of the spoke molding portion 150 and the rim molding portion 155. Therefore, the cutting marks of the vent residue 220 are generated on the spokes SRR. The spokes SRR are less likely to be touched by the occupant than the rim SR2. Therefore, the deterioration of the tactile feel of the steering wheel SR can be suppressed compared to when the cutting marks of the vent residue 220 are generated on the rim SR2. Furthermore, if a decorative member such as a bezel is disposed on the spokes SRR, the cutting marks can be covered by the decorative member. This suppresses a deterioration in the design and also eliminates the process of smoothing the cutting marks.

[0021] Furthermore, according to the mold 100 of the first embodiment, the spoke molding section 150 includes a first molding section 150L and a second molding section 150R that are positioned symmetrically to each other, and the gate 165 is provided in the first molding section 150L and the vent 170 is provided in the second molding section 150R. This reduces the bias of the resin material poured into the mold 100 compared to a configuration in which the gate 165 and the vent 170 are provided in asymmetric positions. This makes it possible to suppress variations in the quality of the resin layer from section to section.

[0022] Furthermore, according to the mold 100 of the first embodiment, the runner 160 has a crossing portion 162 that is provided in the upper mold 120 and passes above the rim molding portion 155, so that the release agent contained in the resin material can be prevented from accumulating within the crossing portion 162 compared to when the crossing portion 162 is provided in the lower mold 110 and passes below the rim molding portion 155.

[0023] Furthermore, according to the mold 100 of the first embodiment, a protrusion 163 for forming a notch 211 in the gate residue 210 is provided in the crossing portion 162, so that the gate residue 210 can be cut using the notch 211 when the mold 100 is opened. Specifically, as shown in FIG. 3 , the protrusion 163 is located in the upper mold 120, so that when the lower mold 110 and the upper mold 120 are separated for mold opening, it is necessary to cut the gate residue 210 in the crossing portion 162. By forming the notch 211 in the gate residue 210 as in this embodiment, the gate residue 210 can be easily cut.

[0024] B. Manufacturing method of a steering wheel SR for a vehicle in which a resin layer is integrally molded onto a core metal CM: 4 is a process diagram of a method for manufacturing a steering wheel SR for a vehicle in which a resin layer is integrally molded with a core metal CM (hereinafter referred to as a manufacturing method for the steering SR). The manufacturing method for the steering wheel SR is performed as one of the processes for manufacturing a vehicle.

[0025] As shown in FIG. 4, in the preparation step (step S105), a core CM, a resin material, and a mold 100 are prepared. The core CM in this embodiment is an annular handlebar having the hub core portion CM1, rim core portion CM2, and spoke core portions CM3 described above and shown in FIGS. 1 and 2. The resin material includes a main material, a hardener, and a mold release agent. The main material is, for example, polyol. The hardener is, for example, isocyanate. The main material, hardener, and mold release agent may be any material used in resin injection molding. The resin material may also include any pigment. The mold 100 in this embodiment has a spoke molding portion 150, a rim molding portion 155, and a gate 165 shown in FIG. 1. Of the spoke molding portion 150 and the rim molding portion 155, the gate 165 is provided in the spoke molding portion 150.

[0026] 4, in the arrangement step (step S110), the core CM is arranged in the mold 100. Specifically, the core CM is arranged in the lower mold 110, and the upper mold 120 and the lower mold 110 are overlapped.

[0027] In the injection process (step S115), resin material is injected into the mold 100. The resin material is heated and melted by the injection device 1 shown in FIG. 1 and injected into the mold 100 via the runner 160 and gate 165. The resin material passes through the first molding section 150L, ​​the rim molding section 155, and the second molding section 150R in this order. When the interiors of the spoke molding sections 150 and the rim molding section 155 are filled with resin material, excess resin material is discharged to the outside of the mold 100 through the vent 170.

[0028] As shown in Fig. 4, in the mold opening step (step S120), the upper mold 120 and the lower mold 110 of the mold 100 are opened, and the molded product 200 is removed. Although the molded product 200 shown in Fig. 2 shows a state before the gate residue 210 is cut, in reality, the gate residue 210 is cut with the notch 211 as the boundary.

[0029] As shown in Fig. 4, in the removal step (step S125), the gate residue 210 is removed from the molded product 200. Specifically, the tubular gate residue 210 shown in Fig. 2 is cut off at the base of the connection portion with the spoke SRL. At this time, the cutting is performed so that the cut mark is as small as possible. Furthermore, if a vent residue 220 is present, it may be cut off in this step in the same way as the gate residue 210.

[0030] The steering wheel SR manufactured through the above-described series of steps is then fitted with decorative members such as an illumination device and a bezel.

[0031] C. Second embodiment: FIG. 5 is a front view of a molded product 200c manufactured using the mold of the second embodiment. While the molded product 200 manufactured using the mold 100 of the first embodiment was a circular steering wheel SR, the steering wheel SRc of the second embodiment is a so-called irregular steering wheel having a butterfly-shaped external shape. The configurations not described below are the same as those of the first embodiment, and therefore will not be described again. As shown in FIG. 5, the steering wheel SRc of the second embodiment includes a hub SR1c, a rim SR2c, and a mount SR4.

[0032] The hub SR1c is connected to the rotation shaft of the vehicle and is located at the center of the steering wheel SRc. In this embodiment, a resin layer is not integrally molded with the hub SR1c, so the hub core metal portion CM1c as the skeleton is exposed to the outside.

[0033] The rims SR2c are gripped by a driver of the vehicle. One rim SR2c is provided on each side in FIG. 5. The rims SR2c have an L-shaped exterior. The rims SR2c are manufactured by integrally molding a resin layer onto a rim core metal portion CM2c, which serves as a framework. The pair of rims SR2c are connected to the upper side of the hub SR1c in FIG. 5.

[0034] A decorative member is attached to the mount portion SR4. A "decorative member" is a member attached to the steering wheel SRc to improve its design or functionality, such as a pad, garnish, cover, or illumination device. In FIG. 5, the mount portion SR4 is hatched. The mount portion SR4 is located at the portion connecting the hub SR1c and the rim SR2c, and at the portion connecting the pair of rims SR2c together. The mount portion SR4 is manufactured by integrally molding a resin layer onto the mount core metal portion CM4, which serves as the framework. The mount portion SR4 is provided with engagement structures such as protrusions and holes for attaching the decorative member.

[0035] The mold used to manufacture the steering wheel SRc described above includes a rim molding portion for integrally molding the resin layer onto the rim core metal portion CM2c, and a mount molding portion for integrally molding the resin layer onto the mount core metal portion CM4. The gate for pouring the resin material into the mold is provided in the mount molding portion of the rim molding portion and the mount molding portion. Therefore, the gate residue is formed while being connected to the mount portion SR4, and the removal trace of the gate residue is left on the mount portion SR4.

[0036] Furthermore, the vent for discharging air from the mold is provided in the mount molding part of the rim molding part and the mount molding part. Therefore, the vent residue is formed while being connected to the mount part SR4, just like the gate residue, and the cut-out trace of the vent residue is formed in the mount part SR4.

[0037] According to the mold of the second embodiment described above, the gate is provided in the mount molding portion of the mount molding portion and the rim molding portion, so the removal marks of the gate residue are generated in the mount portion SR4. Since a decorative member is attached to the mount portion SR4, the removal marks can be covered and concealed by the decorative member. This prevents the removal marks of the gate residue from deteriorating the tactile feel of the steering wheel SRc and reducing its design.

[0038] Furthermore, with the mold of the second embodiment, the vent is provided in the mount molding portion of the rim molding portion, and therefore the removal marks of the vent residue are left on the mount portion SR4. A decorative member is attached to the mount portion SR4, and the removal marks can be concealed by the decorative member. This prevents the removal marks of the vent residue from deteriorating the tactile feel of the steering wheel SRc and reducing its design.

[0039] D. Other Embodiments: (D1) In the first embodiment, the steering wheel SR has an annular external shape, but the present disclosure is not limited to this. The steering wheel SR may be a handle with an irregular shape, such as a D-shape or a butterfly shape. Also, in the second embodiment, the steering wheel SRc is a handle with an irregular butterfly shape, but the present disclosure is not limited to this. The steering wheel SRc may have an annular external shape. In other words, the steering wheels SR and SRc in the present disclosure may be handles with any shape.

[0040] (D2) In the first embodiment, the protrusion 163 may be realized by providing any blade within the crossing portion 162.

[0041] (D3) In the second embodiment, the steering wheel SRc does not include the spokes SRL and SRR, but the present disclosure is not limited to this. The steering wheel SRc may include the spokes SRL and SRR.

[0042] (D4) In each of the above embodiments, the steering SR, SRc may be provided on any moving body other than a vehicle. Such moving bodies include, for example, ships, airplanes, spacecraft, so-called flying cars, etc. Furthermore, the moving body does not necessarily have to be a moving object, but may also be an object that realizes virtual movement, such as a simulator.

[0043] The present disclosure is not limited to the above-described embodiments and can be realized in various configurations without departing from the spirit thereof. For example, the technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention section can be appropriately replaced or combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0044] 1...injection unit, 100...mold, 110...lower mold, 120...upper mold, 150...spoke molding section, 150L...first molding section, 150R...second molding section, 155...rim molding section, 160...runner, 161...supply section, 162...cross section, 163...projection section, 165...gate, 170...vent, 200, 200c...molded product, 210...gate residue, 211...notch, 220...vent residue, CM...core, CM1, CM1c...hub core, CM2, CM2c...rim core, CM3...spoke core, CM4...mount core, CML...first core, CMR...second core, PL...parting line, SR, SRc...steering, SR1, SR1c...hub, SR2, SR2c...rim, SRL, SRR...spoke, SR4...mount

Claims

1. A mold for integrally molding a resin layer onto a core metal of a steering of a moving body, the core metal has a hub core metal portion connected to a rotation shaft of the moving body, a spoke core metal portion connected to the hub core metal portion and serving as a framework for spokes of the steering, and a rim core metal portion connected to the spokes and serving as a framework for a rim to be gripped by a rider of the moving body, The mold is a spoke molding section for integrally molding the resin layer onto the spoke core; a rim molding portion for integrally molding the resin layer with the rim core metal portion; a gate for pouring a resin material into the mold, the gate being provided in the spoke molding portion of the spoke molding portion and the rim molding portion; A mold comprising:

2. The mold according to claim 1, The mold further comprises a vent for discharging air from the mold, the vent being provided in the spoke molding portion out of the spoke molding portion and the rim molding portion.

3. The mold according to claim 2, the spoke core portions include a first core portion and a second core portion that are provided at positions symmetrical to each other with respect to the hub core portion when the core portion is viewed from the front, the spoke molding portion includes a first molding portion for integrally molding the resin layer with the first core portion, and a second molding portion for integrally molding the resin layer with the second core portion, the gate is provided in the first molding portion, The vent is provided in the second molding portion. Mold.

4. The mold according to any one of claims 1 to 3, a runner connected to the gate and serving as a flow path through which the resin material passes; The runner has a crossing portion provided in an upper mold of the mold and passing above the rim molding portion. Mold.

5. The mold according to claim 4, The mold has a protrusion provided within the crossing portion for forming a notch in the gate residue formed by hardening the resin within the crossing portion.

6. A mold for integrally molding a resin layer onto a core metal of a steering of a moving body, the core metal includes a mount core metal portion that is a framework of a mount portion to which a decorative member of the steering wheel is attached, and a rim core metal portion that is a framework of a rim that is connected to the mount core metal portion and is gripped by an occupant of the vehicle, The mold is a mount molding portion for integrally molding the resin layer on the mount core metal portion; a rim molding portion for integrally molding the resin layer with the rim core metal portion; a gate for pouring a resin material into the mold, the gate being provided in the mount molding portion of the mount molding portion and the rim molding portion; A mold comprising:

7. The mold according to claim 6, The mold further comprises a vent for discharging air from the mold, the vent being provided in the mount molding portion out of the mount molding portion and the rim molding portion.

8. A method for manufacturing a steering wheel for a moving body in which a resin layer is integrally molded on a core metal, comprising: a preparation step of preparing a mold having a core metal, a resin material, a spoke molding portion, and a rim molding portion, wherein a gate is provided in the spoke molding portion of the rim molding portion; a placement step of placing the core metal in the mold; an injection step of injecting the resin material into the mold; a mold opening step of opening the mold and removing the molded product; a removal step of removing gate residue from the molded product; A method for manufacturing a steering wheel comprising:

Images