阅读说明：本技术 模型部件及模型部件的制造方法 (Mold member and method for manufacturing mold member ) 是由 西村悠纪 山上笃史 望月时道 志田健二 原章 于 2019-10-30 设计创作，主要内容包括：本发明提供以稳定的品质实施了渐变的模型部件及模型部件的制造方法。模型部件具有：第1层,其由第1颜色的第1材料形成；以及第2层,其以覆盖所述第1层的至少一部分的方式形成,并由与所述第1颜色不同的第2颜色的第2材料形成,所述第2层构成为包含能够观察确认所述第1层的第1部分以及与所述第1部分连续且无法观察确认所述第1层的第2部分。(The invention provides a mold component with stable quality and a method for manufacturing the mold component. The model member has: a 1 st layer formed from a 1 st material of a 1 st color; and a 2 nd layer formed of a 2 nd material having a 2 nd color different from the 1 st color so as to cover at least a part of the 1 st layer, wherein the 2 nd layer includes a 1 st portion which enables the 1 st layer to be visually confirmed and a 2 nd portion which is continuous with the 1 st portion and from which the 1 st layer cannot be visually confirmed.)

1. A mold part, the mold part having:

a 1 st layer formed from a 1 st material of a 1 st color; and

a 2 nd layer formed so as to cover at least a part of the 1 st layer and formed of a 2 nd material of a 2 nd color different from the 1 st color, wherein,

the 2 nd layer includes a 1 st portion which enables the observation of the 1 st layer and a 2 nd portion which is continuous with the 1 st portion and from which the 1 st layer cannot be observed.

2. The model part of claim 1,

the 2 nd layer includes portions of different thicknesses at portion 1.

3. Model part according to claim 1 or 2,

the transparency of the 1 st color is lower than the transparency of the 2 nd color.

4. Model part according to claim 3,

the 2 nd color is translucent.

5. Model part according to claim 3,

the 1 st color is opaque and the 2 nd color is translucent.

6. Model part according to claim 3,

the 1 st color is translucent and the 2 nd color is translucent.

7. Model part according to any one of claims 1 to 6,

the layer 1 is connected to a 1 st runner made of the 1 st material, and the 1 st runner is used as a connecting member with another mold member when the mold member is combined with the other mold member to form a finished product.

8. Model part according to claim 7,

the 1 st runner used as the connecting means is exposed to the surface of the 2 nd layer.

9. Model part according to any one of claims 1 to 8, wherein,

the 1 st material is polystyrene, and the 2 nd material is general-purpose polystyrene.

10. A method of manufacturing a model part, wherein,

the method for manufacturing the model component comprises the following steps:

a 1 st step of molding a 1 st layer using a 1 st material of a 1 st color;

a 2 nd step of forming a 2 nd layer by using a 2 nd material of a 2 nd color different from the 1 st color so as to cover at least a part of the 1 st layer; and

a 3 rd step of forming a 3 rd layer by using the 2 nd material of the 2 nd color so as to cover at least a part of a surface of the 1 st layer opposite to the surface on which the 2 nd layer is formed,

in the 2 nd step, the 2 nd layer is molded in a state where the surface on the opposite side of the 1 st layer is supported,

in the 3 rd step, the 3 rd layer is molded in a state where the 2 nd layer is supported,

at least one of the 2 nd layer and the 3 rd layer is molded so as to include a 1 st portion where the 1 st layer can be observed and confirmed and a 2 nd portion which is continuous with the 1 st portion and where the 1 st layer cannot be observed and confirmed.

11. The manufacturing method of model member according to claim 10,

in the 2 nd step, the opposite side surface of the 1 st layer is supported by a molding die used in the 1 st step for molding the 1 st layer,

in the 3 rd step, the 2 nd layer is supported by the molding die used in the 2 nd step for molding the 2 nd layer.

Technical Field

The present invention relates to a mold member and a method of manufacturing the mold member.

Background

When coloring a part (also referred to as a part) of an assembly model called a so-called plastic model (japanese: プラモデル, registered trademark), for example, a toy face, painting is performed by one-by-one human hand and painting is performed by a sprayer using a mask having openings at colored portions (see patent document 1). Further, it has been proposed to automate coating using a color device including a plurality of printers and conveyors (see patent document 2).

Patent document 1: japanese examined patent publication (Kokoku) No. 3-34226

Patent document 2: japanese laid-open patent publication No. 8-47585

Disclosure of Invention

Problems to be solved by the invention

However, it is skilled to perform gradation such that the color is thickened stepwise, and it is difficult to stabilize the quality. Further, when a color device for painting is used, there is a problem that additional equipment investment and equipment size increase.

Accordingly, an object of the present invention is to provide a mold member having a stable quality and a method for manufacturing the same.

Means for solving the problems

The invention of the model component has:

a 1 st layer formed from a 1 st material of a 1 st color; and

a 2 nd layer formed so as to cover at least a part of the 1 st layer and formed of a 2 nd material of a 2 nd color different from the 1 st color,

the 2 nd layer includes a 1 st portion which enables the observation of the 1 st layer and a 2 nd portion which is continuous with the 1 st portion and from which the 1 st layer cannot be observed.

The invention of the method for manufacturing a mold member includes:

a 1 st step of molding a 1 st layer using a 1 st material of a 1 st color;

a 2 nd step of forming a 2 nd layer by using a 2 nd material of a 2 nd color different from the 1 st color so as to cover at least a part of the 1 st layer; and

a 3 rd step of forming a 3 rd layer by using the 2 nd material of the 2 nd color so as to cover at least a part of a surface of the 1 st layer opposite to the surface on which the 2 nd layer is formed,

in the 2 nd step, the 2 nd layer is molded in a state where the surface on the opposite side of the 1 st layer is supported,

in the 3 rd step, the 3 rd layer is molded in a state where the 2 nd layer is supported,

at least one of the 2 nd layer and the 3 rd layer is molded so as to include a 1 st portion where the 1 st layer can be observed and confirmed and a 2 nd portion which is continuous with the 1 st portion and where the 1 st layer cannot be observed and confirmed.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention can provide a mold member having a stable quality and a method for manufacturing the same.

Drawings

Fig. 1 is a flowchart showing an example of a method for manufacturing a mold member according to an embodiment of the present invention.

Fig. 2 is a diagram for explaining a molded product produced by the method for producing a mold member according to the embodiment of the invention.

Fig. 3 is a diagram for explaining the structure of a model member according to the embodiment of the invention.

Fig. 4 is a diagram for explaining a cross-sectional structure of a mold member according to an embodiment of the invention.

Detailed Description

Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings. In the drawings, the same reference numerals denote the same elements. In the drawings, the vertical and horizontal directions on the paper surface are the vertical and horizontal directions of the member (or component) of the present embodiment, and are used in the description of the present specification. In the embodiments described below, polystyrene is exemplified as the molding material, but the present invention is not limited thereto, and the use of other materials (thermoplastic resins such as polyethylene and ABS, thermosetting resins, metals, and the like) is not excluded.

First, a method of manufacturing a mold member according to an embodiment of the invention will be described with reference to a flowchart of fig. 1. In S101, primary molding for forming a primary molding layer constituting a skeleton portion of a model member is performed. As a molding material (raw material) of the primary molded layer, opaque Polystyrene (PS) or reinforced polystyrene (KPS) can be used. Next, in S102, secondary molding for forming a secondary molding layer on the surface of the primary molding layer so as to cover the half surface of the primary molding layer is performed. As the molding material of the secondary molding layer, for example, transparent or translucent general-purpose polystyrene (GPPS) can be used. Next, in S103, three-time molding for forming a three-time molded layer in a manner to cover the primary molded layer at the remaining portion of the surface of the primary molded layer is performed. The secondary molded layer and the tertiary molded layer form the outer surface (skin portion) of the mold member, but are formed so that the primary molded layer formed on the lower side is different in color transmission degree in accordance with the thickness of the secondary molded layer and the thickness of the tertiary molded layer.

In the above-described steps, the molding material constituting the primary molding layer has an opaque color (for example, blue, green, another color such as a solid color, a metallic color, a pearlescent color, etc.) or a transparent (including translucent) color (for example, blue, green, another color), and the molding material of the secondary molding layer and the molding material of the tertiary molding layer have a transparent or translucent color. For example, in the case where the model member constitutes a part of the hair of a doll, the secondary molded layer and the tertiary molded layer constituting the surface are transparent white (translucent white), whereas the primary molded layer can be made to be thick blue, thick green, or the like. The color of the secondary molding layer and the color of the tertiary molding layer may be the same as the color of the primary molding layer, or may be similar to or opposite to each other. In the present embodiment, by forming the primary molded layer, the secondary molded layer, and the tertiary molded layer from the molding materials of different colors and forming the secondary molded layer and the tertiary molded layer using the transparent raw material or the translucent raw material in this manner, gradation can be expressed so that the primary molded layer of different colors located below the secondary molded layer and the tertiary molded layer is seen therethrough.

The material of the molding material of each molding layer can be a common material because the primary molding layer, the secondary molding layer, and the tertiary molding layer are joined and integrated with each other. In the above examples, PS, KPS, and GPPS have different properties, but a common material is used as polystyrene. For example, ABS resin, Polyethylene (PE), or the like may be used in common in addition to polystyrene. Further, materials of different materials may be used for some layers.

The method of manufacturing the mold member including the three-stage molding process described above can be performed using, for example, a multicolor molding apparatus. In each molding step, a mold corresponding to the step is used. Specifically, the molding material is poured into a runner groove of a molding die and a molding space (cavity) for molding each member to form a molded product, and the molded product is taken out from the molding die after cooling. Molded articles produced by primary molding and secondary molding are each subjected to secondary molding or tertiary molding by being attached to a molding die in the next molding step. Since a molding method using a multicolor molding apparatus is known per se, a more detailed description thereof will be omitted.

Further, although the case where the primary molded layer is molded by performing the molding step once has been described above, the primary molded layer may be divided according to the thickness of the primary molded layer to be molded and the primary molding may be performed twice. In this case, the molding step is performed in four stages. By molding the primary molding layer twice, it is possible to reduce the dishing and the deformation at the time of molding and to produce a molded article having a uniform appearance.

Next, the molding steps from the primary molded layer to the tertiary molded layer will be described with reference to fig. 2, in accordance with the molding method of fig. 1 corresponding to the present embodiment. Fig. 2 is a sectional view of the molding die and the molded object in the molding process. Fig. 2 (a) and 2 (B) correspond to the one-shot molding of S101. As shown in fig. 2 a, a molding die 201 and a molding die 202 (a male die and a female die, and the male die and the female die may be distributed in reverse) have a film cavity 203 corresponding to a primary molded layer to be molded, and a molding material is flowed into the film cavity 203 through a main runner and a sub-runner (not shown) to form a component.

Then, as shown in fig. 2 (B), a mold 204 is produced by one-shot molding using a molding die 201 and a molding die 202. The molding object 204 comprises a main runner, a secondary runner and a primary molding layer. The molded product 204 is formed of Polystyrene (PS). The main runner is formed so as to surround the periphery of the member, and the member is connected to the main runner via the sub-runner, and is thereby fixed to the main runner. Also, the main runner and the sub-runner correspond to grooves for flowing the molding material into the film cavities 203 in the molding dies 201 and 202. In the primary molding in S101, the molding material is flowed from the main runner grooves of the molding die 201 and the molding die 202 into the film cavity 203 through the sub-runner groove, and after all the film cavity, the main runner groove, and the sub-runner groove are filled with the molding material, the molding material is cooled to produce the molded product 204 including the primary molded layer.

Next, in the secondary molding in S102, a secondary molding layer is formed so as to cover the upper side of the primary molding layer. Fig. 2 (C) and 2 (D) correspond to the secondary molding of S102. As shown in fig. 2 (C), a cavity 212 corresponding to an after-molding layer to be formed in the after-molding is formed between the molding die 211 and the molded object 204, and the molding material is flowed into the cavity 212 through a main runner and an auxiliary runner (not shown). As a result, as shown in fig. 2 (D), a molded product 213 including a secondary molded layer is formed, and at least a part of the primary molded layer is covered with General Purpose Polystyrene (GPPS). The molding 213 includes a main runner, a sub-runner, and a secondary molding layer. In the present embodiment, the secondary molding layer is formed by forming GPPS on the upper surface of the primary molding layer through the sub-runner from the main runner. At this time, since the lower side of the primary molded layer is supported by the molding die 202, the molded object 213 can be accurately formed so that the thickness of the secondary molded layer becomes a desired thickness without changing the position of the molded object 204.

In the secondary molding in S102, after the molded object 204 is fixed to the inside of the molding die 211 and the molding die 202, the molding material (GPPS) is flowed into the film cavity 212 from the main runner groove via the sub-runner groove, and after all of the film cavity 212, the main runner groove, and the sub-runner groove are filled with the molding material, the molded object 213 can be formed on the upper surface of the molded object 204 by cooling.

Next, in the third molding in S103, a third molding layer is formed so as to cover the remaining surface of the first molding layer. Fig. 2 (E) and 2 (F) correspond to the three-shot molding in S103. The molding 223 is formed by covering the surface of the molding 204 on which the molding 213 is not formed with the molding material. In the tertiary molding, the molding die 211 used for the secondary molding is disposed on the lower side, and the molding die 221 is disposed on the upper side, and the molding die 221 forms the film cavity 222 between itself and the molded object 204. Thus, the position of the molded product 204 on which the molded product 213 is formed is fixed by the molding die 211, and the size of the cavity 222 can be prevented from varying during the three molding operations. In this way, after the molded object 204 on which the molded object 213 is formed is fixed inside the molding die 221 and the molding die 211, the molding material (GPPS) is flowed into the film cavity 222 from the main runner groove via the sub-runner groove, and after all the film cavity, the main runner groove, and the sub-runner groove are filled with the molding material, the molded object 223 can be formed on the surface of the molded object 204 by cooling. From above, the mold member can be molded.

In the present embodiment, the molding layer covering the primary molding layer is formed in two steps, but if the molding layer is to be formed in a single forming step, the molded article 203 is placed in the cavity of the molding die while being supported only by the runner. When the molding material is fed in this state, the position of the molding material 203 is varied by the pressure of the molding material, and the sizes of the cavities 212 and 222 are varied, and as a result, the thickness of the secondary molding layer and the thickness of the tertiary molding layer may not be a predetermined thickness. If the thickness varies, a desired color tone cannot be obtained in the appearance of the finished molded part, and this affects the yield. In contrast, by forming the molding layer covering the primary molding layer in two steps, the yield can be improved.

Next, an example of the structure of the mold member manufactured by the manufacturing method of fig. 1 and 2 will be described with reference to fig. 3. Fig. 3 (a) is a diagram showing an example of a model member 300 as a part of hair of a doll toy, which is manufactured by a molding process corresponding to the present embodiment. The outer surface 303 of the mold member 300 is constituted by the secondary molding layer and the tertiary molding layer, and a part of the primary molding layer covered with the secondary molding layer and the tertiary molding layer is exposed to the outside as the connecting portion 301 and the runner 302. In particular, runner 302 is exposed to the surfaces of the secondary and tertiary mold layers. The connection portion 301 and the runner 302 function as a connection member for connecting to another member.

Fig. 3 (B) is a separated view of the mold member 300 separated into a plurality of molded layers. Fig. 3 (B) shows a case where the one-shot molding is performed in two times. That is, the primary molded layer is composed of the 1 st molded layer 311 and the 2 nd molded layer 312, the secondary molded layer is composed of the 3 rd molded layer 313, and the tertiary molded layer is composed of the 4 th molded layer 314. The 1 st and 2 nd molding layers 311 and 312 form a skeleton portion of the mold member, and the 3 rd and 4 th molding layers 313 and 314 form a skin portion of the mold member. Hereinafter, for the sake of brevity, the 1 st and 2 nd molding layers 311 and 312 are collectively referred to as "skeleton portions", and the 3 rd and 4 th molding layers 313 and 314 are collectively referred to as "skin portions". In fig. 3 (B), the surface of the skeleton portion is configured such that the entire skeleton is filled with the molding material without any gap, but may be formed in a comb-like or lattice-like shape including gaps between members.

In the present embodiment, the outer skin portion is formed so as to cover the skeleton portion, and the surface of the outer skin portion is formed with irregularities, and the thickness is adjusted by the irregularities. The skin portion is a molded layer forming a surface of the mold part 200, and has a surface corresponding to a desired outer shape of the mold. The model member 200 is a part of the hair of the doll, and thus represents the hairstyle using the surface shape of the outer skin portion.

When the shape of the outer surface of the skeleton portion and the shape of the outer surface of the skin portion are compared, the structure includes a portion having a similar shape and a portion having a non-similar shape. The similarly shaped portions maintain the thickness of the skin portion at a prescribed value. On the other hand, the portions of dissimilar shape are formed to have a different thickness from the portions of similar shape, and the color of the skeleton portion visually recognizable from the outside through the skin portion changes in accordance with the change in thickness. For example, in the case where the skin portion is formed of a translucent (e.g., transparent white) raw material and the skeleton portion is formed of a blue raw material, the blue color of the skeleton portion appears to be clouded through the transparent white skin portion. At this time, since the thickness of the skin portion is kept constant at the portions of similar shape, the degree of white turbidity of the color that can be seen through the translucent skin portion of the skeleton portion is constant. However, if the thickness of the outer skin portion is further increased, the degree of white turbidity becomes strong, and only the color of the outer skin portion is observed in a portion where the skeleton portion does not exist. When the thickness of the outer skin portion is reduced, the degree of white turbidity becomes weak and blue becomes dark, and therefore, the shade can be changed by changing the thickness. Further, since the outer shape of the skeleton portion is configured to be tapered at the tip end, the hair can be made to appear in a color gradually changing from white-turbid blue to white. In the present embodiment, the portion where the skeleton portion (color of the skeleton portion) can be observed from the skin portion and the portion where the skeleton portion (color of the skeleton portion) cannot be observed without including the skeleton portion are continuously molded, whereby gradation due to a change in color can be expressed. Here, in the case where the skin portion is obtained by joining two or more molded layers, at least one molded layer may have the above-described structure.

Next, a cross-sectional structure of the mold member 300 according to the present embodiment will be described. Fig. 4 (a) is a cross-sectional view exemplarily showing a cross-section of a portion where the thickness of the skin portion is maintained at a predetermined value in the model member 300 of fig. 3 (a). As shown in the sectional view of fig. 4 (a), the outer skin portion constituting the outer surface of the mold member 300 has a thickness D1, and the entire thickness is uniform. In the thus-configured portion, the color is kept uniform when the model member 300 is viewed from the outside. On the other hand, fig. 4 (B) is a cross-sectional view exemplarily showing a section of the model member 300 of fig. 3 (a) in which the thickness of the skin portion is varied. As shown in the sectional view of fig. 4 (B), a part of the skin portion constituting the outer surface of the model member 300 has a thickness D1, and the other parts have thicknesses D2 and D3, and the thickness is D1 < D2 < D3. In the portion configured as described above, the larger the thickness, the greater the degree of color mixture of the color of the skin portion with respect to the color of the skeleton portion, and the greater the change in color when the model member 300 is viewed from the outside. For example, in the case where the skin portion is formed of a transparent white raw material, the greater the thickness, the greater the degree of white turbidity, and the lighter the color tone of the skeleton portion at D2 is than the color tone of the skeleton portion at D1, and the lighter the color tone of the skeleton portion at D3 is than the color tone of the skeleton portion at D2.

By changing the thickness of the skin portion locally or entirely in this manner, the color when the model member 300 is viewed from the outside can be made different. At this time, in the portion where the thickness of the skin portion becomes continuously thick, the degree of color mixture of the color of the skin portion with respect to the color of the skeleton portion becomes gradually larger, and therefore the color gradually becomes lighter from the portion where the color of the skeleton portion is seen through most intensely, and changes to the color of the skin portion itself, and therefore, the observer can observe the gradation on the surface of the model member 300.

The appearance of the gradation can be different depending on the manner in which the thickness of the skin portion is changed. For example, by making the degree of change in thickness steep or gentle, the manner of change from a darker color to a lighter color is made different, and thus different gradation expressions can be realized. Also, the thickness may be varied in the direction of decrease. This also enables a change from a lighter color to a darker color.

As described above, according to the present embodiment, it is possible to provide a mold member in which gradation is performed with stable quality, and a method for manufacturing the same.