JP2020082505A - Mold manufacturing method, molding mold, and vehicle interior material manufacturing method - Google Patents

Abstract

To form suitably fine irregularities on a mold.SOLUTION: A manufacturing method of molding a mold 1 for molding a vehicle interior material includes: a mold forming process for forming a main body mold 11 having an interior material molding part 12 which is a portion which is recessed from a mold surface 10A and which molds a vehicle interior material, and a recess 13 which is a portion which is not a portion for molding the vehicle interior material and which is arranged outside of inner surface of the interior material molding part 12 and is depressed from the mold surface 10A, and a box-like mold 30 configured to be able to be taken in and out of the recess 13 and opened on the mold surface; and a concavo-convex forming step of forming fine concavo-convex 41, 43 on surfaces 12A, 31A on the mold surface 10A side in the main body mold 11 and the box-like mold 30. The concavo-convex forming step includes a confirming step of taking out the box-like mold 30 from the recess 13 and confirming a formation mode of the fine concavo-convex 43 in the box-like mold 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to a molding die manufacturing method, a molding die, and a vehicle interior material manufacturing method.

Conventionally, a method described in Patent Document 1 is known as a method for manufacturing a mold. In Patent Document 1, in a method of manufacturing a mold having a fine concavo-convex pattern, a liquid is landed on a base material to form a master mold having a desired concavo-convex pattern, and a mother mold forming step. And a die manufacturing step of electrochemically depositing a predetermined metal on the mother die by an electroforming process to manufacture a die having a mirror image relationship with the mother die. A method of making a mold is disclosed.

JP 2004-114379 A

However, in the method for manufacturing a molding die (mold) disclosed in Patent Document 1, for example, in order to confirm the formation mode of fine irregularities in the molding die, it is necessary to convey the molding die body for inspection. is there. In that case, it takes time and cost to accurately form fine irregularities on the mold.

The present invention has been completed based on the above circumstances, and an object thereof is to suitably form fine irregularities on a molding die.

The present invention is a method of manufacturing a molding die for molding a vehicle interior material,
The interior material molding portion which is recessed from the mold surface and which is the portion for molding the vehicle interior material, and the portion which is not the portion for molding the vehicle interior material, and which is arranged inside and outside the surface of the interior material molding portion. A mold forming step of forming a main body mold having a recessed part that is recessed from the mold surface, and a box-shaped mold that is configured to be able to be put in and taken out from the recessed part and that is open to the mold surface.
In the main body mold and the box-shaped mold, including an unevenness forming step of forming fine unevenness on the surface of the mold surface side,
The concavo-convex forming step includes a confirmation step of taking out the box-shaped mold from the concave part and confirming a mode of forming the fine concavo-convex in the box-shaped mold.

According to such a method for manufacturing a mold, in the concavo-convex forming step, the box-shaped mold is taken out from the concave portion and the formation mode of the fine concavo-convex is confirmed, so that the fine pattern in the main body die is not directly confirmed. It is possible to estimate the formation mode of the unevenness. If the fine irregularities formed in the box-shaped mold do not have the desired roughness or gloss, for the fine irregularities formed on the mold surface side of the main body mold, the conditions such as the time relating to the formation are appropriately set. By adjusting, the roughness, gloss, etc. can be adjusted to a desired aspect.

In the mold forming step, the surface of the box-shaped mold on the mold surface side may be formed as a slope inclined from the mold surface.

When molding a vehicle interior material having a desired outer shape with a molding die, depending on the depth of depression from the die surface, it may not be possible to accurately form fine irregularities on the die surface side. However, according to the method for manufacturing a mold as described above, since the surface of the box-shaped mold on the mold surface side is formed as a slope inclined from the mold surface, it is formed on the surface of the mold surface side in the unevenness forming step. By checking the fine irregularities formed, it is possible to estimate the relationship between the depth of depression from the mold surface and the mode of forming the fine irregularities. As a result, it is possible to improve the estimation accuracy of the formation mode of the fine irregularities in the main body mold.

Further, the present invention is a molding die for molding a vehicle interior material,
The interior material molding portion which is recessed from the mold surface and which is the portion for molding the vehicle interior material, and the portion which is not the portion for molding the vehicle interior material, and which is arranged inside and outside the surface of the interior material molding portion. A main body mold having a recessed part that is recessed from the mold surface;
With a box-shaped mold that is configured to be able to be taken in and out of the recess and has an opening on the mold surface,
The main body mold and the box-shaped mold are characterized in that fine irregularities are formed on the surface on the mold surface side.

According to such a molding die, it is possible to take out the box-shaped mold from the concave portion and confirm the formation of the fine irregularities. Therefore, when manufacturing the molding die, it is possible to make a fine pattern in the main body mold without directly confirming the main body mold. It is possible to estimate the formation mode of the unevenness.

In the above configuration, the surface of the box-shaped mold on the mold surface side may be an inclined surface inclined from the mold surface.

According to such a molding die, the surface of the box-shaped die on the die surface side forms an inclined surface inclined from the die surface, and therefore, by confirming the fine irregularities formed on the die surface side, It is possible to estimate the relationship between the depth of depression from the surface and the mode of forming fine irregularities. As a result, it is possible to improve the estimation accuracy of the formation mode of the fine irregularities in the main body mold.

In the above configuration, the main body mold having a plurality of the recesses arranged on the inside and outside of the surface of the interior material molding portion,
The plurality of box-shaped molds configured to be able to be taken in and out of the plurality of recesses can be provided.

According to such a molding die, when the molding die is manufactured, the step of confirming the fine irregularities of the box-shaped die can be repeated a plurality of times, so that the fine irregularities of the main body die are accurately formed. be able to. In addition, it is conceivable that if the interior material for a vehicle is molded with a molding die many times, fine irregularities are deteriorated. According to the molding die as described above, the box-shaped molds are taken out one by one from the plurality of recesses at every predetermined number of moldings of the vehicle interior material, and the deterioration of the fine irregularities in the box-shaped mold is confirmed. You can This makes it possible to estimate the relationship between the number of times the vehicle interior material is molded and the degree of deterioration of fine irregularities.

Also, including a molding step of molding the vehicle interior material using the molding die described above,
The molding step may be a method of manufacturing a vehicle interior material that supplies resin to each of the main body mold and the box-shaped mold.

According to such a method for producing a vehicle interior material, it is possible to produce a vehicle interior material having fine irregularities. Also, of the base material, by checking only the fine irregularities formed on the cut end formed by the box-shaped mold, the roughness and gloss of the fine irregularities formed on the interior material molded by the main body mold, etc. Can be estimated.

According to the present invention, it becomes possible to preferably form fine irregularities on the molding die.

A perspective view showing a molding die (lower die) according to the first embodiment. Sectional view of molding die (lower die) (section taken along line II-II in FIG. 1) Explanatory drawing which expanded the bottom of the box-shaped mold The figure which shows the aspect which performs a plating process to a shaping die. The figure which shows the aspect which shape|molds a base material with a shaping die. Enlarged view of a part of the molded substrate A perspective view showing a molding die (lower die) according to Embodiment 2.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a molding die 1 for molding a vehicle interior material (vehicle interior material) is exemplified. As shown in FIG. 1, the molding die 1 (lower die 10) has a rectangular parallelepiped shape for convenience, and its longitudinal direction is the X direction, its lateral direction is the Y direction, and the direction orthogonal to these XY planes is the same. Each part will be described as the Z direction.

As shown in FIG. 5, the molding die 1 is disposed above in the Z direction, and is used to mold the base material 60 from the surface side that is the back surface (the surface outside the vehicle interior) of the interior material (vehicle interior material) 61. It has a mold 20 and a lower mold 10 that is disposed below in the Z direction so as to face the upper mold 20 and molds the base material 60 from the surface side of the interior material 61 (the surface on the vehicle interior side). .. The upper mold 20 is a movable mold that can be moved in the vertical direction with respect to the lower mold 10 by a drive device (not shown) (for example, an electric motor, an air cylinder, a hydraulic cylinder, or the like). In FIG. 5, the upper mold 20 is moved downward with respect to the lower mold 10 to close the mold.

As the mold 1, for example, a mold containing iron as a main component and containing carbon, silicon, manganese, phosphorus, sulfur and the like can be adopted. The base material 60 is, for example, a thermoplastic resin that is injected between an upper mold 20 and a lower mold 10 that are closed by an injection device (not shown).

As shown in FIG. 1, the lower mold 10 includes a main body mold 11 that occupies most of the lower mold 10 and a box-shaped box-shaped mold 30 that can be inserted into and removed from a recess 13 of the main body mold 11 described later. .. The main body mold 11 is arranged inside the surface thereof and is recessed downward from the mold surface 10A which is the upper surface in the Z direction, and the inside and outside of the interior material molding part 12 (the main body mold 11). And a concave portion 13 which is arranged on the corner side in FIG.

As shown in FIG. 5, the interior material molding portion 12 is a portion for molding the interior material 61 from the base material 60. On the other hand, the recess 13 is a portion that is not a portion where the interior material 61 is molded from the base material 60, and is a portion where the cut end portion 62 that is separated from the interior material 61 is molded. That is, the base material 60 is molded into the interior material 61 by the upper die 20 and the interior material molding portion 12, and the cut end portion 62 separated from the interior material 61 by the upper die 20 and the recess 13. More specifically, a method of manufacturing the interior material 61 described later will be described.

As shown in FIG. 1 and FIG. 5, the recessed portion 13 is formed such that the recessed portion 13 moves downward in the Z-axis direction toward the outside of the interior material molding portion 12 (toward the end portion side of the main body die 11 in the X-axis direction). It has a shape recessed from the surface 10A and has a rectangular shape in a plan view. The box-shaped mold 30 is configured to be able to be taken in and out of the recess 13, and has a box shape opened on the mold surface 10A (upper side in the Z-axis direction). That is, the box-shaped mold 30 has a shape that conforms to the shape of the wall surface formed by the recess 13 and can fit in the recess 13.

The box-shaped mold 30 has a bottom surface portion 31 that constitutes the bottom surface thereof. The bottom surface portion 31 is inclined downward in the Z-axis direction as it goes toward the inside and outside of the interior material molding portion 12. Therefore, the surface 31A of the bottom surface portion 31 on the mold surface 10A side is an inclined surface inclined downward from the mold surface 10A in the Z-axis direction.

As shown in FIG. 2, in the interior material molding portion 12 of the main body die 11 and the bottom surface portion 31 of the box-shaped die 30, a surface on the die surface 10A side (as shown in FIG. Fine concavities and convexities 41 and 43 are formed on the surfaces 12A and 31A which are formed from the inner surface side. The fine concavities and convexities 41 and 43 are made of, for example, chromium and are plating layers having an average protrusion diameter of several micrometers. When the base material 60 is molded, the shapes of the fine concavities and convexities 41 and 43 are transferred to the surface of the base material 60 that is the surface on the vehicle interior side.

As shown in FIG. 3, the fine unevenness 43 formed on the surface 31A of the bottom surface portion 31 is formed in a lower portion of the bottom surface portion 31 from the mold surface 10A side (lower in the Z-axis direction. The more the part is formed), the rougher the irregularities are formed.

Subsequently, a method for manufacturing the molding die 1 will be described with reference to FIGS. 1 to 6. The manufacturing method of the molding die 1 is roughly classified into a mold forming step of forming a main body mold 11 having an interior material molding portion 12 and a recess 13, and a box-shaped mold 30, and an interior material molding portion of the main body mold 11. 12 and the bottom surface portion 31 of the box-shaped mold 30 include a concavo-convex forming step of forming fine concavities and convexities 41 and 43 on the surfaces 12A and 31A on the mold surface 10A side.

In the mold forming step, a block-shaped steel material is cut to form a main body mold 11 having an interior material molding portion 12 and a recess 13 which are recessed from the mold surface 10A. Then, a box-shaped mold 30 having a shape that follows the shape of the wall surface formed by the concave portion 13 and that can fit in the concave portion 13 is formed. That is, the surface 31A of the box-shaped mold 30 on the mold surface 10A side is formed as a slope inclined from the mold surface 10A.

In the unevenness forming step, for example, as shown in FIG. 4, the lower mold 10 (hereinafter, the lower mold 10 of the molding mold 1 will be described) is dipped in a plating bath 51 containing chromic acid and sulfuric acid as main components to form a negative electrode. Is used as the molding die 1, the positive electrode is the electrode 52, and the lower die 10 is plated by connecting to the power source 53. As a result, chromium ions in the plating bath 51 are reduced and deposited as a plating layer on the mold surface 10A of the lower mold 10. Then, in the interior material molding portion 12 of the main body die 11 and the bottom surface portion 31 of the box-shaped die 30, fine irregularities 41 and 43 made of the plating layer are formed on the surfaces 12A and 31A on the die surface 10A side. It

Here, during the plating process, the box-shaped mold 30 is taken out from the recess 13 (see FIG. 1), and the formation mode of the fine irregularities 43 in the box-shaped mold 30 is confirmed (confirmation step). In this confirmation step, it is confirmed whether or not the fine unevenness 43 formed on the box-shaped mold 30 has a desired roughness or gloss. As a result of confirmation, if the formation of the plating layer is insufficient, the above plating treatment is repeated to form the plating layer again. On the other hand, when the plating layer is excessively formed, the plating layer is melted by setting the electrode in the above plating treatment to the reverse electrode. In this way, the mode of forming the fine irregularities 41 (plating layer) on the main body mold 11 is adjusted. When the formation of the plating layer has a desired roughness or gloss, the lower mold 10 is taken out of the plating bath 51 and heated to cure the mold surface 10A, whereby the main mold 11 having the fine irregularities 41 is formed. (Molding die 1) is obtained. Note that the box-shaped mold 30 may be returned to the recess 13 after confirming the formation of the fine irregularities 43.

Next, a method of manufacturing the interior material 61 will be described. As shown in FIG. 5, the upper mold 20 is brought close to the lower mold 10 at a predetermined pressure to close the mold, and a thermoplastic resin is injected between the upper mold 20 and the lower mold 10 from an injection device (not shown). (That is, by supplying resin to each of the main body mold 11 and the box-shaped mold 30), the base material 60 is molded. Then, the base material 60 that follows the uneven shape formed by the upper mold 20 and the lower mold 10 is molded. At this time, as the base material 60, the interior material 61 is molded by the upper die 20 and the interior material molding portion 12, and the cut end portion 62 separated from the interior material 61 by the upper die 20 and the recess 13 is molded. The interior material 61 is, for example, a door trim attached to a vehicle door panel.

Further, the interior material molding portion 12 of the main body mold 11 and the bottom surface portion 31 of the box-shaped mold 30 have surfaces 12A, 31A on the mold surface 10A side on the surfaces of the interior material 61 and the cut-out portion 62 on the vehicle interior side. The shapes of the fine concavities and convexities 41 and 43 (see FIGS. 2 and 3) formed on the are transferred. Then, the interior material 61 and the piece 62 are cooled and removed from the mold 1. Then, the manufacturing of the interior material 61 is completed.

As shown in FIG. 6, the shape of the fine irregularities 43 (see FIG. 3) formed on the box-shaped die 30 is transferred to the surface of the cut end portion 62, which is obtained when the interior material 61 is manufactured, on the vehicle interior side. Thereby, the fine unevenness 63 is formed. Here, the roughness and gloss of the fine irregularities 63 are confirmed. As a result, the relationship between the fine irregularities formed on the interior material 61 and the fine irregularities 41 and 43 formed on the surface of the main body mold 11 and the box-shaped mold 30 on the mold surface 10A side, such as roughness and gloss, is shown. Can be estimated.

Then, the effect of this embodiment is explained. The present invention is a method of manufacturing a molding die 1 (lower mold 10) for molding an interior material 61, which is a portion which is recessed from the mold surface 10A and which molds the interior material 61 and the interior material 61. A main body mold 11 having a concave portion 13 which is a portion which is not a portion to be molded and which is arranged inside and outside the surface of the interior material molding portion 12 and which is concave from the mold surface 10A; A mold forming step of forming a box-shaped mold 30 having an opening on the mold surface 10A, and a concavo-convex pattern for forming fine concavities and convexities 41 and 43 on the surfaces 12A and 31A on the mold surface 10A side in the main mold 11 and the box-shaped mold 30. The forming step includes a forming step, and the uneven forming step includes a confirming step of taking out the box-shaped mold 30 from the recess 13 and confirming the formation mode of the fine unevenness 43 in the box-shaped mold 30.

According to the method for manufacturing the molding die 1 as described above, the box-shaped die 30 is taken out from the recess 13 in the concavo-convex forming step and the formation mode of the fine concavo-convex 43 is confirmed. It is possible to estimate the formation mode of the fine irregularities 41 in the main body mold 11. When the fine irregularities 43 formed on the box-shaped die 30 do not have desired roughness or gloss, the fine irregularities 41 formed on the surface of the main body die 11 on the die surface 10A side need to have the same time, etc. By appropriately adjusting the conditions, the roughness, gloss, etc. can be adjusted to a desired aspect.

In the mold forming step, the surface 31A of the box-shaped mold 30 on the mold surface 10A side is formed as an inclined surface inclined from the mold surface 10A.

When molding the interior material 61 having a desired outer shape with the molding die 1, depending on the depth recessed from the mold surface 10A (distance from the mold surface 10A), the fine irregularities 41 are formed on the surfaces 12A and 31A on the mold surface 10A side. , 43 may not be formed accurately. However, according to the method for manufacturing the molding die 1 as described above, the surface 31A on the die surface 10A side of the box-shaped die 30 is formed as an inclined surface that is inclined downward from the die surface 10A. By confirming the fine irregularities 43 formed on the surface 31A on the mold surface 10A side, it is possible to estimate the relationship between the depth of depression from the mold surface 10A and the formation mode of the fine irregularities 43. As a result, it is possible to improve the estimation accuracy of the formation mode of the fine irregularities 41 in the main body mold 11.

Further, in the present embodiment, in the molding die 1 that molds the interior material 61, the interior material molding portion 12 that is a portion that is recessed from the mold surface 10A and that molds the interior material 61 and the portion that molds the interior material 61. A main body mold 11 having a concave portion 13 which is a non-existing portion and which is arranged inside and outside the interior material molding portion 12 and is concave from the mold surface 10A; In the main body mold 11 and the box-shaped mold 30, fine irregularities 41 and 43 are formed on the surfaces 12A and 31A on the mold surface 10A side.

According to such a molding die 1, it is possible to take out the box-shaped die 30 from the concave portion 13 and confirm the formation of the fine irregularities 43. Therefore, when the molding die 1 is manufactured, the main body die 11 should be directly checked. Instead, it is possible to estimate the formation mode of the fine irregularities 41 in the main body mold 11.

Further, in the above configuration, the surface 31A of the box-shaped mold 30 on the mold surface 10A side is an inclined surface inclined from the mold surface 10A.

According to such a mold 1, the surface 31A on the mold surface 10A side of the box-shaped mold 30 forms a slope inclined from the mold surface 10A, and therefore, the fine unevenness formed on the surface 31A on the mold surface 10A side. By checking 43, it is possible to estimate the relationship between the depth of depression from the mold surface 10A and the form of the fine irregularities 41 and 43. As a result, the accuracy of estimating the formation mode of the fine irregularities 41 and 43 in the main body mold 11 can be improved.

Further, it includes a molding step of molding the interior material 61 using the molding die 1 described above, and in the molding step, the interior material 61 for supplying the resin to each of the main body mold 11 and the box-shaped mold 30 is manufactured. ..

According to such a method of manufacturing the interior material 61, the interior material 61 having fine irregularities can be manufactured. Further, by confirming the fine irregularities 63 formed on the cut end portion 62 formed by the box-shaped die 30 in the base material 60, the fine irregularities formed on the interior material 61 formed by the main body die 11 are confirmed. It is possible to estimate the relations such as roughness and gloss.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, a forming die 101 having a lower die configuration different from that of the first embodiment and a manufacturing method thereof will be exemplified. In the present embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the duplicated description of the structure, action and effect will be omitted.

The lower mold 110 occupies most of the main mold 111, and a plurality of box-shaped molds 130A, 130B configured to be able to be taken in and out from a plurality of recesses 113A, 113B, 113C, 113D of the main mold 111 described later. , 130C, 130D. The main body mold 111 is disposed inside the surface thereof, and is an interior material molding portion 12 recessed downward from a mold surface 110A which is an upper surface in the Z direction, and an interior surface outside of the interior material molding portion 12, It has a plurality of recesses 113A, 113B, 113C, 113D which are arranged in parallel in the Y-axis direction at a predetermined interval and are recessed downward from the mold surface 110A. Note that FIG. 7 shows the lower mold 110 in which a plurality of box-shaped molds 130A, 130B, 130C, and 130D are fitted in the plurality of recesses 113A, 113B, 113C, and 113D, respectively.

Next, a method for manufacturing the molding die 101 will be described. In the unevenness forming step, one of the plurality of box-shaped molds 130A, 130B, 130C, 130D is taken out from the plurality of recesses 113A, 113B, 113C, 113D during the plating process, and The formation of fine irregularities is confirmed (confirmation step). As a result of confirmation, if the formation of the plating layer is insufficient, the above plating treatment is repeated to form the plating layer again. On the other hand, when the plating layer is excessively formed, the plating layer is melted by setting the electrode in the above plating treatment as the reverse electrode.

Then, one box-shaped mold different from the box-shaped mold taken out earlier is taken out, and formation of fine irregularities in the taken-out box-shaped mold is confirmed. Then, the above steps are repeated until the fine irregularities in a desired state are obtained. In this way, the mode of forming the fine irregularities (plating layer) on the main body mold 111 is adjusted a plurality of times.

Then, the effect of this embodiment is explained. The molding die 101 according to the present embodiment includes a main body mold 111 having a plurality of concave portions 113A, 113B, 113C, 113D arranged on the inside and outside of the interior material molding portion 12, and a plurality of concave portions 113A, 113B, 113C, 113D. A plurality of box-shaped molds 130A, 130B, 130C, and 130D that can be taken in and out are provided.

According to such a molding die 101, when the molding die 101 is manufactured, the step of confirming the fine irregularities of the box-shaped dies 130A, 130B, 130C, and 130D can be repeated a plurality of times. The fine irregularities in 111 can be accurately formed. Further, it is conceivable that if the interior material is molded with the molding die 101 many times, fine irregularities are deteriorated. According to the molding die 101 as described above, the box-shaped molds 130A, 130B, 130C, and 130D are taken out one by one from the plurality of recesses 113A, 113B, 113C, and 113D at a predetermined number of times for molding the interior material to form a box-shaped mold. It is possible to confirm the degree of deterioration of fine irregularities in the molds 130A, 130B, 130C, and 130D. This makes it possible to estimate the relationship between the number of times the interior material is molded and the degree of deterioration of fine irregularities.

<Other Embodiments>
The present invention is not limited to the embodiments described above and the drawings. For example, the following embodiments are also included in the technical scope of the present invention, and within the scope not departing from the gist other than the following. Can be variously modified and implemented.

(1) Besides the above-described embodiment, the configuration of the fine irregularities can be changed as appropriate. In the above embodiment, the fine unevenness is the plating layer made of chromium, but the present invention is not limited to this. For example, the fine irregularities may be a plating layer made of iron, silver, or another metal.

(2) In addition to the above-described embodiment, the unevenness forming process can be appropriately changed. In the above-described embodiment, the fine unevenness is formed by performing the plating process in the unevenness forming step, but the present invention is not limited to this. For example, in the unevenness forming step, fine unevenness may be formed by sandblasting or chemical etching.

(3) In addition to the above embodiment, the box-shaped structure can be changed as appropriate. In the above embodiment, the box-shaped mold has the inclined bottom surface, but the invention is not limited to this. For example, the box-shaped mold may have a planar bottom surface (that forms a plane parallel to the mold surface).

(4) The vehicle interior material exemplified in the above embodiment is not limited to the vehicle interior material, and may be provided in various vehicles. For example, the vehicle interior material can be applied to vehicles such as trains and amusement vehicles as ground vehicles, airplanes and helicopters as flying vehicles, and ships and submersible vehicles as offshore and undersea vehicles. Further, the vehicle interior material is not limited to the door trim.

1, 101... Mold, 10, 110... Lower mold, 10A... Mold surface, 11... Main body mold, 12... Interior material molding part, 13... Recess, 20... Upper mold, 30... Box mold, 31... Bottom part , 41, 43... Fine irregularities, 60... Base material, 61... Interior material (vehicle interior material)

Claims (6)

A method for manufacturing a molding die for molding an interior material for a vehicle, comprising:
The interior material molding portion which is recessed from the mold surface and which is the portion for molding the vehicle interior material, and the portion which is not the portion for molding the vehicle interior material, and which is arranged inside and outside the surface of the interior material molding portion. A mold forming step of forming a main body mold having a recessed part that is recessed from the mold surface, and a box-shaped mold that is configured to be able to be put in and taken out from the recessed part and that is open to the mold surface.
In the main body mold and the box-shaped mold, including an unevenness forming step of forming fine unevenness on the surface of the mold surface side,
The unevenness forming step includes a confirmation step of taking out the box-shaped mold from the recessed portion and confirming a formation mode of the fine unevenness in the box-shaped mold. The method of manufacturing a molding die according to claim 1, wherein, in the die forming step, a surface of the box-shaped die on the die surface side is formed as an inclined surface inclined from the die surface. A molding die for molding interior materials for vehicles,
The interior material molding portion which is recessed from the mold surface and which is the portion for molding the vehicle interior material, and the portion which is not the portion for molding the vehicle interior material, and which is arranged inside and outside the surface of the interior material molding portion. A main body mold having a recessed part that is recessed from the mold surface;
With a box-shaped mold that is configured to be able to be taken in and out of the recess and has an opening on the mold surface,
A forming die, wherein in the main body die and the box-like die, fine irregularities are formed on a surface on the die surface side. The molding die according to claim 3, wherein a surface of the box-shaped die on the die surface side is an inclined surface inclined from the die surface. The main body mold having a plurality of the recesses arranged inside and outside the surface of the interior material molding portion,
The molding die according to claim 3 or 4, further comprising: a plurality of the box-shaped dies configured to be able to be taken in and out of the plurality of recesses. A molding step of molding the interior material for a vehicle using the molding die according to any one of claims 3 to 5,
In the molding step, a resin is supplied to each of the main body mold and the box-shaped mold, and a method for manufacturing a vehicle interior material.

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