JP7072318B2 - Mold and how to modify the mold - Google Patents

Description

The present invention relates to a mold for molding a molded product having a first surface and a second surface that is inclined without being orthogonal to the first surface, and a method for modifying the mold.

For example, Patent Document 1 discloses a seal structure for an automobile back door that opens and closes a door opening formed in a rear portion of a vehicle body. Generally, the back door includes an inner panel provided on the vehicle interior side and an outer panel provided on the outside of the vehicle. Further, on the surface of the inner panel of the back door (the surface on the vehicle interior side), a sealing surface is formed at a portion where the sealing member (weather strip) attached to the peripheral edge of the door opening abuts. When closed, the sealing surface abuts on the sealing member to seal the door opening.

As the inner panel and outer panel constituting the back door, resin or metal molded products are used. Such a molded product is manufactured, for example, by molding a molten material of resin or metal using a mold, and examples of the molding method include injection molding (injection molding) and die casting molding.

Japanese Unexamined Patent Publication No. 2004-322865

When a molded product is molded using a mold, the mold may be reworked by performing a finishing process of scraping the molded surface of the mold so that predetermined dimensional accuracy and surface accuracy can be obtained. At this time, depending on the shape of the molded product, the molded surface of the mold may be scraped, so that the dimensions of the surface of the molded product corresponding to the molded surface may change and the design specifications may not be satisfied.

FIG. 7 shows an example of the cross-sectional shape of the inner panel 100 constituting the conventional back door. The inner panel 100 shown in FIG. 7 is adjacent to the first surface 11 serving as a sealing surface and the first surface 11 on the surface on the front side of the vehicle (the surface on the vehicle interior side) with respect to the first surface. It has a second surface 12 that is not orthogonal and is inclined. When molding such an inner panel 100, as shown in FIG. 8, the first molding surface 21 and the second molding surface 22 for molding the first surface 11 and the second surface 12 of the inner panel 100, respectively. The mold 200 having the above is used. The first molding surface 21 and the second molding surface 22 of the mold 200 have a second molding surface 22 so as to correspond to the first surface 11 and the second surface 12 of the inner panel 100. It is an inclined surface that is not orthogonal to the molding surface 21.

The first surface 11 to be the sealing surface is required to have high surface accuracy (position, area, etc. of the sealing surface) from the viewpoint of enhancing the adhesion to the sealing member and ensuring the sealing property. Therefore, when the inner panel 100 having the first surface 11 such as the sealing surface, which requires high surface accuracy, is molded by using the mold 200, the first surface 11 of the molded inner panel 100 is inspected closely. The mold 200 may be reworked by performing a finishing process of scraping the first molding surface 21 of the mold 200 until a predetermined surface accuracy is obtained. Here, when the second forming surface 22 is inclined with respect to the first forming surface 21, when the first forming surface 21 is finished and reworked as shown in FIG. 8, the first forming surface 21 is formed. The molding surface 21 of the above moves in the vertical direction (the depth direction of the mold 200). In FIG. 8, the molded surface of the mold 200 after the rework is shown by a two-dot chain line, and the inner panel 100 molded after the rework is shown by a dotted line, and the hatching of the mold 200 is omitted for convenience of explanation. At this time, since the position P1 of the _one end portion on the second molding surface 22 side of the first molding surface 21 is displaced along the inclination direction of the second molding surface 22, the first molding surface 21 Not only does the position of the change, but the dimension length D ₁ becomes shorter. Therefore, the seal width Ws of the first surface 11 of the inner panel 100 is reduced, the seal area is reduced, and the sealability with the seal member may be deteriorated. Of course, if the position of the first molding surface 21 is inappropriate, the position of the first surface 11 that becomes the sealing surface is also inappropriate, and if the position of the sealing surface is far from the sealing member, the sealing property is deteriorated. If the position of the sealing surface is close to the sealing member, the back door may not be closed properly.

Further, the portion of the surface of the inner panel 100 that can be seen from the vehicle interior side may be a grained surface having grain in order to improve the appearance. For example, when the second surface 12 of the inner panel 100 is a grained surface, the second molded surface 22 of the mold 200 is textured to form a grain, and the grain of the second molded surface 22 is transferred. A textured surface is formed on the second surface 12. As shown in FIG. 8, when the first forming surface 21 is finished and reworked, the second forming surface 22 is extended, and the embossing range Ae of the second forming surface 22 is added accordingly. It is necessary to redo the processing. Therefore, since it is necessary to redo the embossing after reworking the mold 200, the manufacturing lead time of the mold 200 becomes long and the manufacturing cost also increases. Therefore, it is conceivable to perform embossing on the second molding surface 22 after the reworking of the mold 200 is completed, but in that case, the accuracy may be lowered due to the wrinkling, and the reworking may be performed again. There is a risk that it will be needed. Therefore, it is desirable that the graining of the second molding surface 22 be performed before the mold 200 is reworked.

One of an object of the present invention is to provide a mold capable of suppressing a decrease in the size of a molded surface due to reworking the mold and shortening a lead time for producing the mold, and a method for modifying the mold.

The mold according to one aspect of the present invention is
A mold for molding a molded product having a first surface and a second surface that is inclined without being orthogonal to the first surface.
A first molded surface for molding the first surface of the molded product, and
A second molded surface for molding the second surface of the molded product, and
It has a finish adjusting surface that is interposed between the first molding surface and the second molding surface and is orthogonal to the first molding surface.

The method for modifying the mold according to one aspect of the present invention is as follows.
A method for modifying a mold for molding a molded product having a first surface and a second surface that is inclined without being orthogonal to the first surface.
It has a first molding surface for molding the first surface of the molded product and a second molding surface for molding the second surface of the molded product, and also has the first molding surface and the second molding surface. A step of preparing the mold having a finish adjusting surface that is interposed between the molding surface and orthogonal to the first molding surface.
It has a step of repairing the mold by performing a finishing process for scraping the first molding surface.

According to the above-mentioned mold, a finish adjusting surface orthogonal to the first molding surface is provided between the first molding surface and the second molding surface, and this finish adjusting surface is the first molding surface. It is a vertical surface extending vertically from one end side. Therefore, when the first molding surface is finished and reworked, the first molding surface moves in the depth direction of the mold, and one end of the first molding surface on the second molding surface side. The position of the portion will be displaced in the vertical direction along the finish adjustment surface. Therefore, even if the second molding surface is inclined, the position of one end of the first molding surface is not displaced along the inclination direction of the second molding surface when the mold is reworked, and the second molding surface is not displaced. It is possible to suppress the shortening of the dimensional length of the molded surface of 1. That is, it is possible to suppress the dimensional reduction of the first molded surface due to the reworking of the mold, and when the first surface of the molded product is used as the sealing surface, the sealing width (sealing area) is unlikely to decrease. Further, when the second molded surface is textured to make the second surface of the molded product a textured surface, the finish adjusting surface is formed, so that the first molded surface is finished. However, the dimensional length of the second molded surface does not change, and the grain range does not change. Therefore, since it is not necessary to re-texture after reworking the die, the die manufacturing lead time can be shortened and the manufacturing cost can be reduced. Furthermore, even if the mold is reworked, the grain range does not change. Therefore, by performing the graining of the second molding surface before the mold is reworked, it is not necessary to rework the mold again. It is easy to secure a sufficient period for making the mold.

According to the above-mentioned mold modification method, the first molding is performed by preparing a mold having a finish adjusting surface orthogonal to the first molding surface between the first molding surface and the second molding surface. In the process of finishing the surface and reworking the mold, the position of one end of the first forming surface on the side of the second forming surface 22 is displaced in the vertical direction along the finishing adjusting surface. Therefore, even if the second molding surface is inclined, the position of one end of the first molding surface is not displaced along the inclination direction of the second molding surface when the mold is reworked, and the second molding surface is not displaced. It is possible to suppress the shortening of the dimensional length of the molded surface of 1. That is, it is possible to suppress the dimensional reduction of the first molded surface due to the reworking of the mold. Further, when the second molded surface is textured to make the second surface of the molded product the textured surface, the finish adjusting surface is formed in advance in the mold to form the first molded surface. Even if the finishing process is performed, the dimensional length of the second molded surface does not change, and the grain range does not change. Therefore, since it is not necessary to re-texture after reworking the die, the die manufacturing lead time can be shortened and the manufacturing cost can be reduced. Furthermore, even if the mold is reworked, the grain range does not change. Therefore, by performing the graining of the second molding surface before the mold is reworked, it is not necessary to rework the mold again. It is easy to secure a sufficient period for making the mold.

Therefore, the above-mentioned mold and the method of modifying the mold can suppress the dimensional reduction of the molded surface due to the reworking of the mold, and can shorten the lead time for manufacturing the mold.

FIG. 3 is a schematic front view of an inner panel of an automobile back door according to the first embodiment as viewed from the passenger compartment side. It is a schematic cross-sectional view which shows the cross section cut by the line II-II of FIG. It is a schematic enlarged sectional view which shows the main part of the mold which concerns on Embodiment 1. FIG. It is a schematic enlarged sectional view which shows the state after the reworking of the mold which concerns on Embodiment 1. FIG. It is a schematic cross-sectional view which shows the cross section cut by the VV line of FIG. It is a schematic enlarged sectional view which shows the main part of the mold which concerns on Embodiment 2. FIG. It is a schematic sectional drawing which shows an example of the inner panel of a conventional back door. It is a schematic enlarged sectional view which shows the main part of the mold which forms the inner panel of a conventional back door.

Specific examples of the mold according to the embodiment of the present invention and the method of modifying the mold will be described with reference to the drawings. The same reference numerals in the figure indicate the same names. In the drawings, the front of the vehicle is FR, the rear of the vehicle is RR, the left side of the vehicle is LH, the right side of the vehicle is RH, the upper part of the vehicle is UP, and the lower part of the vehicle is LW.

[Embodiment 1]
The mold 2 according to the first embodiment will be described with reference to FIGS. 1 to 4. The mold 2 shown in FIG. 3 has a first surface 11 and a second surface 12, and forms a molded product in which the second surface 12 is inclined without being orthogonal to the first surface 11. (In FIG. 3, the hatching of the mold 2 is omitted for convenience of explanation). In the present embodiment, the case where the molded product is the inner panel 1 (see FIG. 1) constituting the back door for an automobile is illustrated. One of the features of the mold 2 is that it has a first molding surface 21 and a second molding surface 22 for molding the first surface 11 and the second surface 12 of the inner panel 1, respectively, and also has a first molding. The point is that the finish adjusting surface 251 orthogonal to the first forming surface 21 is provided between the surface 21 and the second forming surface 22.

<Inner panel>
The inner panel 1 shown in FIG. 1 is a member constituting the passenger compartment side of a back door that opens and closes a door opening formed at the rear portion of a vehicle body (not shown), and a window to which a window glass (not shown) is attached to the upper portion thereof. The opening 10 is provided. A weather strip (not shown), which is a sealing member, is attached to the peripheral edge of the door opening of the vehicle body. As shown in FIG. 2, the inner panel 1 has a first surface 11 on the surface on the FR side (the surface on the vehicle interior side) and one end side of the first surface 11 with respect to the first surface 11. It has a second surface 12 that is not orthogonal and is inclined. FIG. 2 shows a cross section (II-II line cross section) of the right side portion of the inner panel 1 shown in FIG. In the case of the inner panel 1 shown in FIG. 2, the second surface 12 is provided on the inner side in the vehicle width direction (LH side in FIG. 2) of the first surface 11 and the opposite side (outer side in the vehicle width direction in FIG. 2; RH in FIG. 2). On the side), it has a third surface 13 adjacent to the first surface 11. That is, the second surface 12 and the third surface 13 are provided so as to be adjacent to each other on both sides of the first surface 11. Of the surface of the inner panel 1, the first surface 11 is a portion to which the weather strip abuts and is a sealing surface (in FIG. 1, the first surface 11 is hatched for the sake of clarity. ing). On the other hand, the second surface 12 is a portion that can be seen from the vehicle interior side, and is a textured surface in order to improve the appearance. The third surface 13 is a normal surface without grain. In this example, the inner panel 1 is a molded product of a resin such as polypropylene (PP), and is molded by injection molding the resin.

As shown in FIG. 2, the inner panel 1 has a stepped portion 15 that is convex in a direction orthogonal to the first surface 11 at the intersection between the first surface 11 and the second surface 12. Is formed. In this example, the surface connected to the first surface 11 of the stepped portion 15 is the vertical surface 151.

<Mold>
In this example, the mold 2 shown in FIG. 3 is an injection molding mold for injection molding the above-mentioned inner panel 1, and the resin is cooled and solidified by filling the mold 2 with a molten resin material. Inner panel 1 made of plastic is molded. In FIG. 3, only the lower mold 2 for molding the front surface of the inner panel 1 is shown, and the upper mold for molding the back surface (outer surface of the vehicle) on the RR side of the inner panel 1 is shown. not.

(Molding surface)
As shown in FIG. 3, the mold 2 has a first molding surface 21 for molding the first surface 11 of the inner panel 1 and a second surface of the inner panel 1 as molding surfaces for molding the inner panel 1. It has a second molding surface 22 for molding 12. The first molding surface 21 and the second molding surface 22 correspond to the first surface 11 and the second surface 12 of the inner panel 1, respectively, and the second molding is performed with respect to the first molding surface 21. The surface 22 is tilted without being orthogonal to each other. In the case of the mold 2 shown in this example, the mold 2 has a third forming surface 23 for forming the third surface 13 of the inner panel 1, and the second forming surface 22 and the third forming surface 23 are second. It is provided so as to be adjacent to each other on both sides of the molding surface 21 of 1. Since high surface accuracy is required for the first surface 11 of the inner panel 1 to be a sealing surface, the first forming surface 21 for forming the first surface 11 has a predetermined surface accuracy (sealing surface position). ) Is applied to the surface to make it a finished surface. On the other hand, the second molded surface 22 for molding the second surface 12 of the inner panel 1 to be the textured surface is a textured surface that has been textured, and the texture is formed over the entire length thereof. .. The third molded surface 23 for molding the third surface 13 of the inner panel 1 is not subjected to surface treatment such as embossing.

(Finish adjustment surface)
As shown in FIG. 3, the mold 2 of the first embodiment has a concave portion with respect to the first forming surface 21 at the intersection between the first forming surface 21 and the second forming surface 22. It has a groove portion 25, and a step portion 15 is formed on the inner panel 1 corresponding to the groove portion 25. In the first embodiment, the finish adjusting surface 251 is provided in the groove portion 25. The finish adjusting surface 251 shown in FIG. 3 is composed of one wall surface (side surface) of the groove portion 25 connected to the first forming surface 21, and is formed so as to be orthogonal to or substantially orthogonal to the first forming surface 21. There is. That is, the finish adjustment surface 251 is a vertical surface extending in the vertical direction from one end side of the first molding surface 21, and one end portion of the first molding surface 21 on the second molding surface 22 side is the finish adjustment surface 251. It is connected to. Further, the other wall surface 252 of the groove portion 25 connected to the second molding surface 22 is formed so as to be continuous with the second molding surface 22 and to be inclined at the same inclination angle as the second molding surface 22. In this example, the wall surface 252 of the groove 25 constitutes a part of the second molding surface 22. Then, grain processing is performed from the second molding surface 22 to the vicinity of the apex of the groove bottom of the groove portion 25, and the grain is formed on the second molding surface 22 including the wall surface 252 of the groove portion 25. The grained area Ae on which the grain is formed extends below the intersection of the extension line of the first forming surface 21 and the second forming surface 22 before the finishing process. In this example, the parting position Pe of the grain range Ae is set near the apex of the groove bottom of the groove portion 25.

In the mold 2 of the first embodiment, the mold 2 is repaired by performing a finishing process for scraping the first molding surface 21. The reworking of the mold 2 will be described mainly with reference to FIG. In FIG. 4, the first molding surface 21 before reworking is shown by a two-dot chain line, and the hatching of the mold 2 is omitted for convenience of explanation. As shown in FIG. 4, when the first molding surface 21 is finished and reworked, the first molding surface 21 moves in the vertical direction (the depth direction of the mold 2). At this time, by having the finish adjustment surface 251 interposed between the first molding surface 21 and the second molding surface 22, the position P1 of _one end of the first molding surface 21 is the finish adjustment surface 251. Will be displaced vertically along. Therefore, it is possible to prevent the dimensional length D ₁ of the first molding surface 21 from becoming shorter when the mold 2 is reworked. As a result, it is possible to prevent the dimensional length of the first surface 11 of the inner panel 1 formed by the first forming surface 21 from being shortened, and the seal of the first surface 11 (see FIG. 3) to be a sealing surface can be suppressed. The width Ws is unlikely to decrease.

Further, since the finish adjusting surface 251 is formed, even if the first forming surface 21 is finished, the dimensional length of the second forming surface 22 may fluctuate as shown in FIG. No, the parting position Pe of the grain range Ae does not change. Since the finishing process of the first forming surface 21 does not affect the second forming surface 22 or the wall surface 252 of the groove portion 25, the grain range Ae may change even after the finishing process of the first forming surface 21. not.

"effect"
The mold 2 of the first embodiment has the following effects.
By having the finish adjusting surface 251 orthogonal to the first forming surface 21 between the first forming surface 21 and the second forming surface 22, as described above, the first forming by reworking the mold 2 It is possible to suppress the dimensional reduction of the surface 21. Therefore, even if the mold 2 is reworked, the sealing width Ws of the first surface 11 which is the sealing surface is unlikely to decrease, so that the sealing property is unlikely to be deteriorated due to the decrease in the sealing area, and the sealing property can be ensured. Further, even if the first molding surface 21 is finished, the grain range Ae does not change, so that it is not necessary to redo the grain processing after reworking the mold 2, the manufacturing lead time of the mold 2 can be shortened, and the manufacturing cost can be shortened. Can also be reduced. Further, by performing the embossing before the reworking of the mold 2, it is not necessary to rework the mold 2 again, and it is easy to secure a sufficient period for making the mold 2.

<How to fix the mold>
An example of the above-mentioned modification method of the mold 2 will be described. The method of modifying the mold 2 includes, for example, the following steps.
1. 1. A preparatory step for preparing a mold in which a finish adjusting surface 251 orthogonal to the first molding surface 21 is formed in advance between the first molding surface 21 and the second molding surface 22 of the mold 2 (see FIG. 3). ..
2. 2. A reworking step (see FIG. 4) in which the first molding surface 21 is finished and the mold 2 is reworked.
Hereinafter, each step will be described in detail.

(Preparation process)
As shown in FIG. 3, the preparatory steps include a first forming surface 21 for forming the first surface 11 of the inner panel 1 and a second forming surface 22 for forming the second surface 12 of the inner panel 1. This is a step of preparing a mold 2 having a finish adjusting surface 251 interposed between the first forming surface 21 and the second forming surface 22 and orthogonal to the first forming surface 21. In the example shown in FIG. 3, the mold 2 has a groove 25 formed at the intersection of the first molding surface 21 and the second molding surface 22 so as to be concave with respect to the first molding surface 21. The length (depth of the groove 25) of the finish adjusting surface 251 before the reworking process may be, for example, 5 mm or more and 15 mm or less.

In this example, before the reworking process, the second molding surface 22 is subjected to grain processing to form a grain on the mold 2. Specifically, grain processing is performed from the second molding surface 22 to the apex of the groove bottom of the groove portion 25 to continuously form grain from the second molding surface 22 to the wall surface 252 of the groove portion 25. The grain processing may be performed by a known method, and examples thereof include etching with an etching agent.

(Repair process)
As shown in FIG. 4, the reworking step is a step of reworking the mold 2 by performing a finishing process for scraping the first molding surface 21. In this step, finishing is performed once or more until the first molded surface 21 has a predetermined surface accuracy (seal surface position). The finishing process may be performed by a known method, and examples of the finishing process include grinding and polishing.

In the reworking process, the first molding surface 21 moves in the depth direction of the mold 2 due to the finishing process. At this time, by having the finish adjustment surface 251 interposed between the first molding surface 21 and the second molding surface 22, the position P1 of _one end of the first molding surface 21 is the finish adjustment surface 251. Will be displaced along. Therefore, it is possible to prevent the dimensional length D ₁ of the first molding surface 21 from becoming shorter when the mold 2 is reworked.

Further, by forming the finish adjusting surface 251 in advance, the dimensional length of the second forming surface 22 does not change even if the first forming surface 21 is finished, and the grain range Ae. Since the parting position Pe does not change, the grain range Ae does not change.

"effect"
The modification method of the mold 2 of the first embodiment has the following effects.
As described above, by preparing the mold 2 having the finish adjusting surface 251 orthogonal to the first molding surface 21 between the first molding surface 21 and the second molding surface 22, the mold 2 can be formed. It is possible to suppress the dimensional reduction of the first molded surface 21 due to reworking. Further, even if the first molding surface 21 is finished, the grain range Ae does not change, so that it is not necessary to redo the graining after the mold 2 is reworked, and the manufacturing lead time of the mold 2 can be shortened. The cost can also be reduced. Further, by performing the embossing before the reworking of the mold 2, it is not necessary to rework the mold 2 again, and it is easy to secure a sufficient period for making the mold 2.

In the above-described first embodiment, the groove 25 is provided at the intersection of the first molding surface 21 and the second molding surface 22, and the finish adjusting surface 251 is provided in the groove 25. A groove portion that is concave with respect to the first molding surface 21 may also be provided at the intersection of the molding surface 21 and the third molding surface 23. Similar to the second forming surface 22, when the third forming surface 23 is inclined with respect to the first forming surface 21, the intersection of the first forming surface 21 and the third forming surface 23 is also formed. By providing the groove portion, a finish adjusting surface orthogonal to the first forming surface 21 can be provided between the first forming surface 21 and the third forming surface 23. As a result, it is possible to avoid the dimensional reduction of the first molding surface 21 due to the reworking of the mold 2. Therefore, the seal width Ws of the first surface 11 which is the seal surface does not decrease. Further, as in the case of the second forming surface 22, when the third forming surface 23 is subjected to the embossing, by providing the groove portion, it becomes unnecessary to re-embed after the die 2 is reworked, and the die is formed. The production lead time of 2 can be shortened.

In the above-described first embodiment, the cross-sectional shape of the groove 25 formed in the mold 2 is U-shaped as shown in FIG. 3, but the finish adjusting surface 251 is formed by the wall surface of the groove 25. The cross-sectional shape of the groove portion 25 may be, for example, V-shaped. In the case of a V shape, the finish adjusting surface 251 does not become a vertical surface (see FIG. 3) orthogonal to the first forming surface 21, but becomes an inclined surface not orthogonal to the first forming surface 21. In this case, when the first molded surface 21 is finished and reworked, even if the dimensional length D ₁ (see FIG. 4) of the first molded surface 21 becomes long, it does not decrease. not. That is, since it is possible to suppress the dimensional reduction of the first molding surface 21 due to the reworking of the mold 2, even if the mold 2 is reworked, the sealing width Ws of the first surface 11 to be the sealing surface is unlikely to decrease.

[Embodiment 2]
The mold 2 according to the second embodiment will be described with reference to FIGS. 5 and 6, focusing on the differences from the first embodiment. In FIG. 6, the hatching of the mold 2 is omitted for convenience of explanation.

<Inner panel>
The inner panel 1 shown in FIG. 5 shows a cross section (VV line cross section) of the upper portion of the inner panel 1 shown in FIG. In the case of the inner panel 1 shown in FIG. 5, the second surface 12 is provided on the lower side (LW side in FIG. 5) of the first surface 11, and the third surface 13 is provided on the upper side (UP side in FIG. 5). Is provided. Then, similarly to the inner panel 1 of the first embodiment described with reference to FIG. 2, the second surface 12 is inclined without being orthogonal to the first surface 11, and the first surface 11 is a sealing surface. , The second surface 12 is a textured surface. In the inner panel 1 shown in FIG. 5, a stepped surface is formed between the first surface 11 and the second surface 12, and the stepped surface becomes a vertical surface 151 orthogonal to the first surface 11. ing.

<Mold>
The mold 2 shown in FIG. 6 has a first molding surface 21 for molding the first surface 11, the second surface 12, and the third surface 13 of the inner panel 1 as a molding surface for molding the inner panel 1. , Has a second molding surface 22 and a third molding surface 23. Then, similarly to the mold 2 of the first embodiment described with reference to FIG. 3, the second molding surface 22 is tilted without being orthogonal to the first molding surface 21. Further, the first molded surface 21 is a finished surface that has been finished, and the second molded surface 22 is a textured surface that has been textured. A grain is formed on the second molding surface 22 over the entire length thereof.

(Finish adjustment surface)
As shown in FIG. 6, in the mold 2 of the second embodiment, a step is formed between the first forming surface 21 and the second forming surface 22, and the finish adjustment orthogonal to the first forming surface 21 is formed. A surface 251 is provided. The finish adjustment surface 251 is a vertical surface extending in the vertical direction from one end side of the first molding surface 21, and one end of the first molding surface 21 is connected to the finish adjustment surface 251. The parting position Pe of the grain range Ae formed on the second forming surface 22 is set near the intersection of the second forming surface 22 and the finish adjusting surface 251.

The reworking of the mold 2 in the second embodiment will be described. In the mold 2 of the second embodiment, the mold 2 is repaired by temporarily overlaying the first molding surface 21 and then performing a finishing process. In FIG. 6, the first molded surface 21 and the first surface 11 after the rework are shown by solid lines, and the first molded surface 21 and the first surface 11 before the rework (before overlaying) are shown by the alternate long and short dash line, respectively. It is shown by the dotted line. As shown in FIG. 6, when the first molding surface 21 is built up before the finishing process, the overlaying direction at one end of the first molding surface 21 is along the finish adjusting surface 251. The position P1 of _one end of the first forming surface 21 is displaced in the vertical direction along the finish adjusting surface 251. Therefore, it is possible to prevent the dimension length D ₁ of the first molding surface 21 from being shortened during overlaying, and even if the first molding surface 21 is finished and reworked after overlaying, it is not possible to overlay. It is possible to prevent the _first molding surface 21 from becoming shorter than the dimensional length D1. Further, since the finish adjusting surface 251 is interposed between the first forming surface 21 and the second forming surface 22, even if the first forming surface 21 is finished, as shown in FIG. 6, The dimensional length of the second forming surface 22 does not change, and the parting position Pe of the grain range Ae does not change. Since the finishing process of the first forming surface 21 does not affect the second forming surface 22, the grain range Ae does not change even after the finishing process of the first forming surface 21.

In the method of modifying the mold 2 of the second embodiment, as shown in FIG. 6, in the reworking step, the first molding surface 21 is overlaid and then the finishing process is performed.

The above-mentioned modification method of the mold 2 and the mold 2 of the second embodiment has the same effect as that of the first embodiment.

The present invention is not limited to these examples, but is shown by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. For example, in the first embodiment, an injection molding die in which a molten resin is filled in a mold and an inner panel (molded product) made of resin is injection-molded has been described, but the present invention is not limited to this, and iron, aluminum alloy, etc. It may be an injection molding die or a die casting die for forming a metal inner panel by filling the mold with the molten metal of the above. Further, the molded product may be an outer panel of a back door for an automobile, or may be a side door for an automobile arranged on a side portion of a vehicle body, not limited to the back door.

The mold of the present invention and the method for modifying the mold can be used for a mold for molding various molded products such as an automobile panel, and particularly preferably used for a mold for molding a molded product having a sealing surface. can.

1,100 inner panel (molded product)
2,200 mold 10 window opening 11 first surface (seal surface)
12 Second surface (textured surface)
13 3rd surface 15 Steps 151 Vertical surface 21 1st forming surface 22 2nd forming surface 23 3rd forming surface 25 Grooves 251 Finish adjustment surface 252 Wall surface

Claims (2)

A mold for molding a molded product having a first surface and a second surface that is inclined without being orthogonal to the first surface.
A first molded surface for molding the first surface of the molded product, and
A second molded surface for molding the second surface of the molded product, and
It has a groove or a step provided between the first molding surface and the second molding surface.
A finish adjusting surface is provided on a part of the surface constituting the groove or the step .
The finish adjusting surface is a surface orthogonal to the first molding surface and connected to the first molding surface.
Mold. A method for modifying a mold for molding a molded product having a first surface and a second surface that is inclined without being orthogonal to the first surface.
It has a first molding surface for molding the first surface of the molded product and a second molding surface for molding the second surface of the molded product, and also has the first molding surface and the second molding surface. The step of preparing the mold having a groove or a step provided between the molding surface and the molding surface.
It has a step of repairing the mold by performing a finishing process of scraping the first molding surface.
A finish adjusting surface is provided on a part of the surface constituting the groove or the step .
The finish adjusting surface is a surface orthogonal to the first molding surface and connected to the first molding surface.
How to fix the mold.

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