JP7095546B2 - Molding equipment - Google Patents

Description

The techniques disclosed herein relate to molding dies and molding equipment.

Conventionally, a molding mold provided with a heat medium flow path is known (Patent Document 1 below). Patent Document 1 describes a configuration in which a heat medium flow path (cooling circuit) is formed inside the nest and the molding die can be cooled. In such a cooling circuit, for example, a heat medium flow path is configured by making a hole inside the mold, and the mold can be cooled by circulating the heat medium through the heat medium flow path. It has become.

Japanese Patent No. 6020822

It is difficult to make the heat medium flow path into a complicated shape by the method of forming the heat medium flow path by making a hole in the inside of the molding die. For this reason, when the molded surface has a complicated shape, it becomes difficult to make the heat medium flow path follow the shape of the molded surface, and the molded surface has a portion near and a portion far from the heat medium flow path. It ends up. As a result, temperature unevenness may occur on the molded surface, and the quality of the molded product may deteriorate. Further, since it is difficult for heat to be transferred to the portion of the molding surface far from the heat medium flow path, it takes time to reach a desired temperature, which increases the molding time.

The technique disclosed in the present specification has been completed based on the above circumstances, and is a molding die having a heat medium flow path having a shape that imitates the shape of a molding surface, and such a molding die. It is an object of the present invention to provide a molding apparatus provided.

As a means for solving the above-mentioned problems, the technique disclosed in the present specification is to form a mold main body portion having a molded surface and a groove portion formed on an outer surface of the mold main body portion which is different from the molded surface. A plate-shaped portion having a fitted plate shape is provided, and a part of the inner surface of the groove portion has a shape that follows the shape of the molded surface, and the part of the inner surface and the plate-shaped portion have a shape. It is characterized in that a heat medium flow path through which a heat medium can be circulated is configured by the outer surface.

By forming the heat medium flow path by a part of the inner surface having a shape that follows the shape of the molding surface, it is possible to form the heat medium flow path that has a shape that follows the shape of the molding surface. By flowing a heating medium or a cooling medium through such a heat medium flow path, the molded surface can be heated or cooled evenly. Then, in the above configuration, the heat medium flow path can be configured by fitting the plate-shaped portion after forming the groove portion. Before fitting the plate-shaped portion, a machining tool or the like can be inserted into the groove through the opening of the groove, so that the inner surface of the groove can be easily machined into a shape that follows the shape of the molded surface. can do. Therefore, it is possible to easily form a heat medium flow path having a shape that follows the shape of the molded surface.

Further, the molded surface has a stepped portion, the groove portion is opened on the side opposite to the molded surface, and the heat medium flow path is the bottom surface of the groove portion and the bottom surface of the plate-shaped portion. The bottom surface of the groove portion may have a groove-side step portion that follows the shape of the step portion. By forming the groove side step portion on the bottom surface of the groove portion, it is possible to form a heat medium flow path having a shape that imitates the step portion of the molded surface. Since a tool or the like can be inserted into the bottom surface of the groove portion from the opening side of the groove portion, a step portion on the groove portion side can be easily formed.

Further, the groove portion is opened on the side opposite to the molding surface, and a plate-shaped portion side groove portion is formed at a portion of the plate-shaped portion facing the side surface of the groove portion, and the heat medium flow path is formed. A first flow path formed by a bottom surface of the groove portion and a facing surface facing the bottom surface in the plate-shaped portion, and a second flow path formed by the side surface of the groove portion and the inner surface of the plate-shaped portion side groove portion. , Can be. By forming a groove portion (plate-shaped portion side groove portion) in the plate-shaped portion, a second flow path different from the first flow path can be formed by the inner surface of the plate-shaped portion side groove portion. Therefore, two flow paths (first flow path and second flow path) can be formed by one plate-shaped portion.

Further, the heat medium flow path extends in the vertical direction, and the molding die is connected to the upper end side flow path connected to the upper end of the heat medium flow path and the lower end of the heat medium flow path. The lower end side flow path has an opening opened upward, and the lower end side flow path has an opening opened downward. Can be. The heat medium can be supplied to the opening opened upward, and the heat medium can be discharged from the opening opened downward. By doing so, since the heat medium can flow from the upper side to the lower side, the heat medium can flow more smoothly inside the heat medium flow path. Therefore, the molded surface can be heated or cooled more quickly.

Further, the mold main body portion and the plate-shaped portion may be made of the same material. By using the same material for the mold body and the plate-shaped part, the volume change (thermal expansion rate and heat shrinkage rate) due to the temperature change when the heat medium flows through the heat medium flow path can be made the same. can. As a result, for example, the plate-shaped portion contracts as compared with the mold main body portion, and a gap is generated between the plate-shaped portion and the mold main body portion, or the plate-shaped portion expands as compared with the mold main body portion and the mold is formed. It is possible to suppress the situation where stress acts on the main body.

Further, a plurality of the heat medium flow paths may be arranged along the molding surface. By arranging a plurality of heat medium flow paths that follow the shape of the molding surface along the molding surface, the molding surface can be heated (or cooled) evenly in the two-dimensional direction (plane direction).

Further, the molding apparatus disclosed by the present specification includes the molding die and a distributor for distributing the heat medium to each of the plurality of heat medium flow paths included in the molding die, and is an outlet of the distributor. It is possible that a plurality of outlet-side passages constituting the above-mentioned distributor are provided at equal intervals on the circumference centered on the central axis of the inlet-side passage constituting the inlet of the distributor. Each distance from the inlet side passage of the distributor to each outlet side passage of the distributor can be made closer. As a result, the flow rate of the heat medium supplied to the plurality of heat medium channels after being distributed by the distributor can be made more uniform, and the molded surface can be heated or cooled more uniformly.

According to the present invention, it is possible to provide a molding die provided with a heat medium flow path having a shape following the shape of a molding surface, and a molding apparatus provided with such a molding die.

The figure which shows the molding apparatus which concerns on Embodiment 1. A cross-sectional view showing a molding die provided in the molding apparatus of FIG. Cross-sectional view showing a plurality of heat medium flow paths in a molding die Cross-sectional view showing a cross section different from FIG. 2 in the molding die. Sectional view showing the first flow path and the second flow path (corresponding to the view cut by the VV line in FIG. 3). Exploded view showing the mold body and plate-shaped members Cross-sectional view showing the inlet side manifold 21 (corresponding to the view cut by the VII-VII line in FIG. 8). A view of the manifold body of the inlet side manifold 21 as viewed from the inlet side. Cross-sectional view showing the inlet side manifold 22 (corresponding to the view cut by the IX-IX line in FIG. 10) A view of the manifold body of the inlet side manifold 22 as viewed from above. Cross-sectional view showing the molding die of the comparative example Sectional drawing which shows the molding mold which concerns on Embodiment 2.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 11. In this embodiment, a molding apparatus 10 for manufacturing a trim board 12 (interior material for a vehicle) is illustrated. The trim board 12 is, for example, a resin molded product made of a synthetic resin (for example, a thermoplastic resin such as polypropylene) and manufactured by injection molding. As shown in FIGS. 1 and 2, the molding apparatus 10 may supply a heat medium (for example, hot water or cold water) to the molds 29 and 30 and the plurality of heat medium flow paths 31 included in the mold 30. A possible supply device 11, inlet-side manifolds 21 and 22 (distributors) that distribute the heat medium supplied from the supply device 11 to each of the plurality of heat medium flow paths 31, and discharge from the plurality of heat medium flow paths 31. It is provided with outlet-side manifolds 23 and 24 for collecting the heat medium and sending it to the supply device 11. In each figure, the arrangement direction of the plurality of heat medium flow paths 31 is the X-axis direction, the closing direction of the molding dies 29 and 30 is the Y-axis direction, and the vertical direction is the Z-axis direction.

As shown in FIGS. 2 and 3, the molding die 29 has a molding surface 29A that imitates one of the front and back surfaces of the trim board 12, and the molding die 30 has a molding surface 29A on the front and back surfaces of the trim board 12. It has a molded surface 30A that imitates the other surface. The molding dies 29 and 30 are provided so as to be openable and closable by a drive device (not shown). In the state where the molding dies 29 and 30 are closed, the molding space S1 is formed between the molding surface 29A and the molding surface 30A as shown in FIG. Further, the molding apparatus 10 includes an injection apparatus (not shown) for injecting the molten resin into the molding space S1.

As shown in FIGS. 2 and 3, the molding die 30 has a mold main body portion 32 having a molding surface 30A, a plurality of plate-shaped portions 34, and a plate-shaped portion 34 from the side opposite to the mold main body portion 32. It is provided with a receiving plate 39 (not shown in FIG. 3) in contact with the receiving plate 39. As shown in FIG. 3, a plurality of groove portions 33 are formed on the surface 32A (the outer surface of the mold body 32 that is different from the molding surface) opposite to the molding surface 30A in the mold body 32. The plate-shaped portion 34 is arranged so that the plate thickness direction coincides with the X-axis direction, and is fitted to the groove portion 33. The mold body portion 32 and the plate-shaped portion 34 are made of metal such as steel, and are made of the same material. The molding die 30 has a plurality of heat medium flow paths 31 capable of circulating a heat medium, and the heat medium flow path 31 provides a space between the mold main body portion 32 and the plate-shaped portion 34. It is composed of things.

As shown in FIG. 2, the molded surface 30A has a plurality of stepped portions (for example, stepped portions 35A and 35B) corresponding to the surface shape of the trim board 12. As shown in FIG. 3, the groove portion 33 is opened on the side opposite to the molding surface 30A (lower side in FIG. 3), and the bottom surface 33A (a part of the inner surface of the groove portion) of the groove portion 33 is as shown in FIG. In addition, it has a shape that follows the shape of the molding surface 30A. That is, the bottom surface 33A has a plurality of groove-side step portions (for example, groove-side step portions 36A, 36B) that follow the shape of the plurality of step portions (for example, the step portions 35A and 35B) of the molding surface 30A. The heat medium flow path 31 is composed of a bottom surface 33A of the groove 33 and a facing surface 34A (outer surface of the plate-shaped portion) facing the bottom surface 33A of the plate-shaped portion 34. That is, the heat medium flow path 31 is a space provided between the bottom surface 33A and the facing surface 34A.

As shown in FIG. 6, when the heat medium flow path 31 is formed, after the groove 33 is formed on the molding surface 30A, the plate is viewed from the opening side (right side in FIG. 6) of the groove 33 with respect to the groove 33. The shaped portion 34 is fitted. Further, after the plate-shaped portion 34 is fitted to the groove portion 33, the plate-shaped portion 34 is covered with the receiving plate 39 (see FIG. 2) from the opening side of the groove portion 33.

As shown in FIGS. 1 and 2, the heat medium flow path 31 extends in the vertical direction. Further, the molding die 30 has an upper end side flow path 41 connected to the upper end of the heat medium flow path 31, and a lower end side flow path 42 connected to the lower end of the heat medium flow path 31. The upper end side flow path 41 is composed of through holes formed over both the plate-shaped portion 34 and the receiving plate 39, and extends upward from the upper end of the heat medium flow path 31 toward the receiving plate 39. It is extended. The upper end side flow path 41 has an opening 41A (first opening) opened upward, and this opening 41A is an inlet for a heat medium in the molding die 30. The lower end side flow path 42 is composed of through holes formed over both the plate-shaped portion 34 and the receiving plate 39, and extends downward from the lower end of the heat medium flow path 31 toward the receiving plate 39. It is extended. The lower end side flow path 42 has an opening 42A (second opening) opened downward, and this opening 42A is an outlet for the heat medium in the molding die 30.

Further, at the boundary between the plate-shaped portion 34 and the receiving plate 39, O-rings 43 are arranged around the upper end side flow path 41 and the lower end side flow path 42, respectively. As a result, it is possible to prevent the heat medium flowing through the heat medium flow path 31 from leaking to the outside of the molding die 30 from the boundary (gap) between the plate-shaped portion 34 and the receiving plate 39. Further, as shown in FIG. 3, an O-ring 45 is interposed between the side surface of the groove 33 and the plate-shaped portion 34. As a result, it is possible to prevent the heat medium flowing through the heat medium flow path 31 from leaking to the outside of the molding die 30 from the boundary (gap) between the mold main body portion 32 and the plate-shaped portion 34.

As shown in FIGS. 1 and 2, in the present embodiment, the heat medium flow path 31 is along the X-axis direction (direction along the molding surface 30A and orthogonal to the extension direction of the heat medium flow path 31). Multiple lines are lined up. The plurality of heat medium flow paths 31 are arranged at equal intervals in the X-axis direction, for example. 2 and 4 are cross-sectional views of the molding die 30 cut along a line along the Z-axis direction, and each shows a different cross section. As shown in FIGS. 2 and 4, the shape of the heat medium flow path 31 follows the shape of the molding surface 30A of the portion where the heat medium flow path 31 is arranged. That is, each of the plurality of heat medium flow paths 31 has a different shape.

Further, as shown in FIG. 3, the molding surface 30A extends so as to rise toward the molding die 29 side (upper side in FIG. 3) at the peripheral end portion 30B, and the heat medium flow adjacent to the peripheral end portion 30B. The path 31 (referred to as a heat medium flow path 31A in the following description) has a first flow path 51 composed of a bottom surface 33A and a facing surface 34A, and a second flow path 52. In the plate-shaped portion 34 constituting the heat medium flow path 31A, a plate-shaped portion side groove portion 34B (groove portion on the plate-shaped portion side) is formed at a position facing the side surface 33B of the groove portion 33, and the second flow path 52 Is composed of a side surface 33B of the groove portion 33 (a part of the inner surface of the groove portion) and an inner surface of the plate-shaped portion side groove portion 34B (outer surface of the plate-shaped portion 34). As shown in FIG. 5, for example, the second flow path 52 extends from the first flow path 51 in a branched manner. Although not shown, the outlet of the second flow path 52 merges with the first flow path 51. That is, the heat medium flow path 31A is composed of only the first flow path 51 on the inlet side (upper end side flow path 41 side), and is composed of the first flow path 51 and the second flow path 52 in the middle thereof, and is an outlet. On the side (lower end side flow path 42), only the first flow path 51 is configured.

Next, the supply device 11 for supplying the thermal refrigerant to the molding die 30 will be described. As shown in FIG. 1, the supply device 11 includes a cold water supply unit 13, a hot water supply unit 14, an air supply unit 15, and a valve 16. The inlet side manifold 21 and the outlet side manifold 24 are connected to the supply units 13, 14 and 15 via a valve 16. The chilled water supply unit 13 includes a pump, a cooling device, and the like (not shown), and is configured to be able to supply chilled water (heat refrigerant) to the heat medium flow path 31. The hot water supply unit 14 includes a pump, a heating device, and the like (not shown), and is configured to be able to supply hot water (heat refrigerant) to the heat medium flow path 31. The air supply unit 15 has a configuration capable of supplying air to the heat medium flow path 31.

By switching the valve 16, it is possible to selectively supply either cold water, hot water, or air from each of the supply units 13, 14, and 15 to each heat medium flow path 31. The hot refrigerant (cold water or hot water) supplied to the heat medium flow path 31 flows from the upper part to the lower part of the heat medium flow path 31, so that the molded surface 30A can be cooled or heated. The heat refrigerant discharged from the outlet (opening 42A) of the heat medium flow path 31 returns to the supply device 11, is cooled (or heated) again, and then is sent to the heat medium flow path 31. There is.

Further, by supplying air to the heat medium flow path 31, cold water or hot water remaining in the heat medium flow path 31 can be discharged to the outside of the heat medium flow path 31. In the present embodiment, after heating the molding surface 30A by supplying hot water to the heat medium flow path 31, the molten resin is injected into the molding space S1 (see FIG. 2), and then the heat medium flow path 31 is used. The molded surface 30A is cooled by supplying cold water. By supplying air to the heat medium flow path 31 before supplying cold water to the heat medium flow path 31, the hot water remaining in the heat medium flow path 31 can be reliably discharged to the outside of the heat medium flow path 31. It is possible to cool the molded surface 30A more effectively with cold water.

In the molding apparatus 10, the supply device 11, the inlet side manifolds 21 and 22, the molding die 30 (heat medium flow path 31), and the outlet side manifolds 23 and 24 are circulated and connected in this order. As shown in FIG. 1, in the present embodiment, the case where the molding die 30 has 24 heat medium flow paths 31 is illustrated, but the number of heat medium flow paths 31 can be appropriately changed. .. In the inlet side manifold 21, the fluid (either cold water, hot water, or air) supplied from the supply device 11 via the hose 17 is distributed to the four hoses 18. The four inlet-side manifolds 22 are provided on each of the four hoses 18. In the inlet side manifold 22, the fluid supplied from the hose 18 is distributed to the six heat medium flow paths 31 via each hose 19. The four hoses 18 are set so that their total lengths are the same, and by aligning the total lengths of the four hoses 18, they are supplied to each inlet side manifold 22 (and by extension, each heat medium flow path 31). The difference in the flow rate of the fluid to be formed can be reduced. In the four hoses 18, the smaller the distance between the inlet-side manifold 21 and the inlet-side manifold 22, the larger the number of turns.

The outlet side manifold 23 is connected to the six heat medium flow paths 31 via hoses 25 and 26. A regulating valve 53 for adjusting the pressure is provided between the hose 25 and the hose 26. By adjusting the pressure on the outlet side of each heat medium flow path 31 by each adjustment valve 53, the discharge time when the heat medium is discharged from each heat medium flow path 31 can be made substantially the same. In the outlet side manifold 23, the fluid discharged from the six heat medium flow paths 31 is collected and supplied to the outlet side manifold 24 via the hose 27. In the outlet side manifold 24, the fluids supplied from the four outlet side manifolds 23 are collected and supplied to the supply device 11 via the hose 28. The four hoses 27 are set so that their total lengths are the same, and the smaller the distance between the outlet side manifold 23 and the outlet side manifold 24, the larger the number of turns.

As shown in FIGS. 7 and 8, the inlet-side manifold 21 includes a manifold main body 21A which is a metal block, an inlet-side passage 61, four outlet-side passages 62, and two connection paths 63. Have. The connecting path 63 connects the entrance side passage 61 and the two exit side passages 62. The entrance side passage 61, the exit side passage 62, and the connection path 63 can be formed by making a hole in the manifold main body portion 21A. A hose 17 is connected to the inlet side passage 61, and a hose 18 is connected to the outlet side passage 62. As shown in FIG. 8, the exit-side passages 62 constituting the exit of the inlet-side manifold 21 are equidistantly spaced on the circumference R1 centered on the central axis L1 of the inlet-side passage 61 constituting the inlet of the inlet-side manifold 21. There are four in. Although not shown, the outlet side manifold 24 has a configuration in which the inlet and outlet of the fluid are reversed from those of the inlet side manifold 21.

As shown in FIGS. 9 and 10, the inlet-side manifold 22 includes a manifold body 22A which is a metal block, an inlet-side passage 71, six outlet-side passages 72, and three connection paths 73. Have. The connecting path 73 connects the entrance side passage 71 and the two exit side passages 72. The entrance side passage 71, the exit side passage 72, and the connection path 73 can be formed by making a hole in the manifold main body portion 22A. The inlet side passage 71 is bent in an L shape, is connected to the hose 18 at one end 71A thereof, and communicates with the connection path 73 at the other end 72A. A hose 19 is connected to the outlet side passage 72. As shown in FIG. 10, the outlet-side passage 72 constituting the outlet of the inlet-side manifold 22 has a circumference centered on the central axis L2 of the other end 72A of the inlet-side passage 71 constituting the inlet of the inlet-side manifold 22. Six are provided on R2 at equal intervals. Although not shown, the outlet side manifold 23 has a configuration in which the inlet and outlet of the fluid are reversed from those of the inlet side manifold 22.

Next, the effect of this embodiment will be described. In the present embodiment, by forming the heat medium flow path 31 with the bottom surface 33A having a shape that follows the shape of the molding surface 30A, it is possible to form the heat medium flow path 31 that has a shape that follows the shape of the molding surface 30A. .. By flowing a heat medium through such a heat medium flow path 31, the molded surface 30A can be heated or cooled evenly. Then, in the present embodiment, as shown in FIG. 6, the heat medium flow path 31 can be configured by fitting the plate-shaped portion 34 after forming the groove portion 33. In the state before the plate-shaped portion 34 is fitted, a machining tool or the like can be inserted into the groove portion 33 from the opening of the groove portion 33, so that the bottom surface 33A of the groove portion 33 has the shape of the molding surface 30A. It can be easily processed into a shape that follows. Therefore, it is possible to easily form the heat medium flow path 31 having a shape that follows the shape of the molding surface 30A.

Further, the molding surface 30A has a stepped portion 35A, the groove portion 33 is opened on the opposite side to the molding surface 30A, and the heat medium flow path 31 is formed in the bottom surface 33A of the groove portion 33 and the plate-shaped portion 34. It is composed of a facing surface 34A facing the bottom surface 33A, and the bottom surface 33A of the groove portion 33 has a groove portion side step portion 36A that follows the shape of the step portion 35A. By forming the groove side step portion 36A on the bottom surface 33A of the groove portion 33, it is possible to form the heat medium flow path 31 having a shape that imitates the step portion 35A of the molding surface 30A. That is, it is possible to form the heat medium flow path 31 that imitates the molding surface 30A having a complicated shape such as having the stepped portion 35A. Further, since the bottom surface 33A of the groove portion 33 can be inserted with a tool or the like from the opening side of the groove portion 33, the groove portion side step portion 36A can be easily formed.

As a molding die having a heat medium flow path, as shown in the molding die 1 of FIG. 11, a hole portion 2A penetrating in the Z-axis direction and a plurality of hole portions 2B communicating with the hole portion 2A are formed. It is known that the heat medium flow path 2 is configured by forming the respective in 1 and inserting the partition member 2C into the hole 2B. In FIG. 11, the flow of the fluid in the heat medium flow path 2 is shown by the arrow A1. When the heat medium flow path 2 is composed of holes, it is difficult to make the heat medium flow path 2 into a complicated shape because the holes are linear, and the holes 2B are formed on the molded surface 30A. A place far from and near a place is formed, which causes uneven heating or uneven cooling. According to the present embodiment, since the tool or the like can be inserted from the opening side of the groove 33, the heat medium flow path 31 having a complicated shape can be easily formed.

Further, the groove portion 33 is opened on the side opposite to the molding surface 30A, and the plate-shaped portion side groove portion 34B is formed at a portion of the plate-shaped portion 34 facing the side surface 33B of the groove portion 33, and the heat medium flow path 31 is formed. Is composed of a first flow path 51 composed of a bottom surface 33A of the groove portion 33 and a facing surface 34A facing the bottom surface 33A in the plate-shaped portion 34, and an inner surface of the side surface 33B of the groove portion 33 and the plate-shaped portion side groove portion 34B. It has a second flow path 52 and. By forming the plate-shaped portion side groove portion 34B in the plate-shaped portion 34, a second flow path 52 different from the first flow path 51 can be formed by the inner surface of the plate-shaped portion side groove portion 34B. Therefore, two flow paths (first flow path 51 and second flow path 52) can be formed by one plate-shaped portion 34.

Further, the heat medium flow path 31 extends in the vertical direction, and the molding die 30 is connected to the upper end side flow path 41 connected to the upper end of the heat medium flow path 31 and the lower end of the heat medium flow path 31. The lower end side flow path 42 has an opening 41A opened upward, and the lower end side flow path 42 has an opening 42A opened downward. Have. A heat medium can be supplied to the opening 41A opened upward, and the heat medium can be discharged from the opening 42A opened downward. By doing so, since the heat medium can be flowed from the upper side to the lower side, the heat medium can be flowed more smoothly inside the heat medium flow path 31. Therefore, the molded surface 30A can be heated or cooled more quickly.

Further, the mold main body portion 32 and the plate-shaped portion 34 are made of the same material. By using the same material for the mold body 32 and the plate-shaped portion 34, the volume change (thermal expansion rate and heat shrinkage rate) due to the temperature change when the heat medium flows through the heat medium flow path 31 becomes the same. can do. As a result, for example, the plate-shaped portion 34 contracts as compared with the mold main body portion 32, and a gap is generated between the plate-shaped portion 34 and the mold main body portion 32, or the plate-shaped portion 34 is compared with the mold main body portion 32. It is possible to suppress the situation where the mold expands and stress acts on the mold body 32.

In this embodiment, the plate-shaped portion 34 and the mold main body portion 32 are rapidly cooled because the hot water is flowed through the heat medium flow path 31 and then the cold water is flowed. Since the mold body portion 32 and the plate-shaped portion 34 are made of the same material, when the plate-shaped portion 34 and the mold-shaped portion 32 are rapidly cooled, there is a problem due to a temperature change between the plate-shaped portion 34 and the mold-shaped portion 32. It is possible to suppress the situation that occurs.

Further, a plurality of heat medium flow paths 31 are arranged along the molding surface 30A. By arranging a plurality of heat medium flow paths 31 that follow the shape of the molding surface 30A along the molding surface 30A, the molding surface 30A can be heated (or cooled) evenly in the two-dimensional direction (plane direction).

Further, the outlet side passage 62 including the molding die 30 and the inlet side manifold 21 for distributing the heat medium to each of the plurality of heat medium flow paths 31 included in the molding die 30 and constituting the outlet of the inlet side manifold 21 is provided. , A plurality of the inlet-side passages 61 constituting the inlet of the inlet-side manifold 21 are provided at equal intervals on the circumference centered on the central axis L1. By doing so, each distance from the inlet side passage 61 of the inlet side manifold 21 to each outlet side passage 62 of the inlet side manifold 21 can be set to a closer value. As a result, the flow rate of the heat medium supplied to the plurality of inlet-side manifolds 22 (and thus the plurality of heat medium flow paths 31) after being distributed by the inlet-side manifold 21 can be made more uniform, and the molded surface 30A can be formed. It becomes possible to heat or cool more uniformly.

Regarding the inlet-side manifold 22, a plurality of outlet-side passages 72 are provided at equal intervals on the circumference R2 centered on the central axis L2 of the other end 72A of the inlet-side passage 71 constituting the inlet of the inlet-side manifold 22. (6) are provided. Therefore, the flow rate of the heat medium supplied to the plurality of heat medium flow paths 31 after being distributed by the inlet side manifold 22 can be made more uniform, and the molded surface 30A can be heated or cooled more uniformly. It will be possible.

Further, as a configuration for forming a heat medium flow path that imitates the shape of the molding surface 30A, for example, a block-shaped core mold having a surface having a shape that imitates the entire surface of the molding surface 30A is formed on the surface opposite to the molding surface 30A. It is conceivable to fit into the recess formed in 32A to form a heat medium flow path between the bottom surface of the recess and the surface of the core type. However, in such a configuration, the recess (block-shaped recess) for fitting the core mold becomes large, and there is a concern that the strength of the molding mold may decrease. In the present embodiment, since the heat medium flow path 31 can be formed by forming the plurality of groove portions 33 in the molding die 30, the strength of the molding die 30 is lowered as compared with the configuration using the block-shaped core mold. Can be suppressed. Therefore, the configuration of the present embodiment is particularly suitable for being applied to a molding mold that requires a wide molding surface 30A, such as an interior material for a vehicle (interior material for a vehicle).

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG. The same parts as those in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted. In the molding die 130 of the present embodiment, the mold main body 132 is divided and configured by two members (first mold constituent member 132A and second mold constituent member 132B). The groove portion 133A is formed in the first type constituent member 132A, and the groove portion 133B is formed in the second type constituent member 132B. A plate-shaped portion 134A is fitted in the groove portion 133A, and a plate-shaped portion 134B is fitted in the groove portion 133B. The heat medium flow path 131 includes an inlet side flow path 131A composed of a bottom surface of the groove portion 133A and an outer surface of the plate-shaped portion 134A, and an outlet side flow path 131B composed of a bottom surface of the groove portion 133B and an outer surface of the plate-shaped portion 134B. , Have. As described above, one heat medium flow path 131 may be composed of two plate-shaped portions 134A and 134B. In addition, one heat medium flow path may be composed of three or more plate-shaped portions. When the mold main body 132 is divided and configured by two members (first mold constituent member 132A, second mold constituent member 132B), an O-ring 145 may be arranged between the two members 132A and 132B. preferable. As a result, it is possible to prevent the heat medium flowing through the heat medium flow path 131 from leaking to the outside of the molding die 130 from between the two members 132A and 132B.

<Other embodiments>
The present invention is not limited to the embodiments described above and the drawings, and for example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the trim board 12 is exemplified as a resin molded product, but the present invention is not limited thereto. The resin molded body may be a component of a door trim other than the trim board 12, or may be a vehicle interior material (instrument panel, luggage trim, package tray, etc.) other than the door trim. Further, the resin molded product may be an interior material (interior material for a vehicle) mounted on a vehicle other than a vehicle, or may be a member other than the interior material.
(2) In the above embodiment, a molding mold for molding a resin molded product by injection molding is exemplified, but the present invention is not limited to this. The configuration exemplified in the above embodiment can be applied to, for example, a molding die (press die) for molding a resin molded product by press molding instead of injection molding. The heat medium supplied from the supply device to the heat medium flow path is not limited to liquid (hot water or cold water), and may be a gas. Further, only one of the heating medium and the cooling heat medium may be supplied to the heat medium flow path.

10 ... Molding device, 21 and 22 ... Inlet side manifold (distributor), 30 ... Molding mold, 30A ... Molding surface, 31 ... Heat medium flow path, 32 ... Mold main body, 32A ... Surface opposite to the molding surface (The outer surface of the mold body, which is different from the molded surface), 33 ... Groove, 33A ... Bottom surface (part of the inner surface of the groove), 33B ... Side of the groove, 34 ... Plate-shaped part, 34A ... Facing surface (plate) Outer surface of the shaped portion), 34B ... Plate-shaped portion side groove portion, 35A, 35B ... Stepped portion, 36A, 36B ... Groove side stepped portion, 41 ... Upper end side flow path, 41A ... Upper end side flow path opening (first opening) Part), 42 ... Lower end side passage, 42A ... Lower end side flow path opening (second opening), 51 ... First flow path, 52 ... Second flow path, 61 ... Inlet side passage, 62 ... Exit side Passage, L1 ... Central axis of entrance side passage

Claims (5)

A mold main body portion having a molding surface and a plate-shaped plate-shaped portion fitted in a groove portion formed on a surface different from the molding surface on the outer surface of the mold main body portion are provided, and an inner surface of the groove portion is provided. A part of the above has a shape that follows the shape of the molded surface, and a plurality of heat medium flow paths through which the heat medium can flow are formed by the part of the inner surface and the outer surface of the plate-shaped portion. Molds that are arranged side by side along the molding surface and
A distributor for distributing the heat medium to each of the plurality of the heat medium flow paths is provided.
A plurality of outlet-side passages constituting the outlet of the distributor are formed at equal intervals on the circumference centered on the central axis of the inlet-side passages constituting the inlet of the distributor. The molded surface has a stepped portion and has a stepped portion.
The groove portion is opened on the side opposite to the molding surface, and the groove portion is opened.
The heat medium flow path is composed of a bottom surface of the groove portion and a facing surface of the plate-shaped portion facing the bottom surface.
The molding apparatus according to claim 1, wherein the bottom surface of the groove portion has a groove portion side step portion that follows the shape of the step portion. The groove portion is opened on the side opposite to the molding surface, and the groove portion is opened.
A plate-shaped gutter is formed at a portion of the plate-shaped portion facing the side surface of the groove.
The heat medium flow path is
A first flow path formed by a bottom surface of the groove portion and a facing surface facing the bottom surface of the plate-shaped portion,
The molding apparatus according to claim 1 or 2, further comprising a second flow path formed by the side surface of the groove portion and the inner surface of the plate-shaped gutter portion. The heat medium flow path extends in the vertical direction and extends.
The molding mold has an upper end side flow path connected to the upper end of the heat medium flow path and a lower end side flow path connected to the lower end of the heat medium flow path.
The upper end side flow path has a first opening opened upward, and has a first opening.
The molding apparatus according to any one of claims 1 to 3, wherein the lower end side flow path has a second opening opened downward. The molding apparatus according to any one of claims 1 to 4, wherein the mold body portion and the plate-shaped portion are made of the same material.

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