JP6561191B1 - Model part and method for manufacturing model part - Google Patents

Abstract

The present invention provides a model part having gradation with stable quality and a manufacturing method thereof. A first layer formed of a first material of a first color and a second layer formed to cover at least a part of the first layer, the first layer A second component made of a second material of a second color different from the color of the first component, wherein the second layer includes a first portion where the first layer is visually recognized; , And a second portion that is continuous with the first portion and in which the first layer is not visually recognized. [Selection] Figure 1

Description

  The present invention relates to a model part and a method for manufacturing the model part.

  Parts of assembly models (also called parts) called so-called plastic models (registered trademarks), for example, when coloring the face of a toy, paint it with one hand at one place, or place it in a colored place Painting with a spray using a mask provided with an opening is performed (see Patent Document 1). Moreover, what automated the coating using the coloring apparatus provided with the some printing machine and the conveyor is also proposed (refer patent document 2).

No. 3-34226 JP-A-8-47585

  However, skill is required to apply gradation that gradually increases the color, and it is difficult to stabilize the quality. In addition, when using a coloring device for painting, there are problems of additional equipment investment and an increase in equipment size.

  Therefore, an object of the present invention is to provide a model part with gradation and stable quality, and a manufacturing method thereof.

The invention of model parts
A first layer formed of a first material of a first color;
A second layer formed to cover at least a portion of the first layer, the second layer being made of a second material having a second color different from the first color. And
The second layer is configured to include a first portion where the first layer is visually recognized, and a second portion which is continuous with the first portion and where the first layer is not visually recognized .
The first layer is connected to a first runner formed of the first material, and the first runner is configured when the model part is combined with another model part to form a finished product. Used as a connecting member to the other model parts.

The invention of the manufacturing method of model parts
A first step of forming a first layer using a first material of a first color;
A second step of forming the second layer using a second material of a second color different from the first color so as to cover at least a part of the first layer;
A third layer is formed using the second material of the second color so as to cover at least a part of the surface of the first layer opposite to the surface on which the second layer is formed. And a third step of
In the second step, the second layer is molded in a state where the opposite surface of the first layer is supported,
In the third step, the third layer is molded in a state where the second layer is supported,
At least one of the second layer and the third layer includes a first portion in which the first layer is visually recognized, and a second portion in which the first layer is not visually recognized, continuous with the first portion. The portion is formed to include.

  ADVANTAGE OF THE INVENTION According to this invention, the model components by which gradation was given with the stable quality and its manufacturing method can be provided.

It is a flowchart which shows an example of the manufacturing method of the model components corresponding to embodiment of invention. It is a figure for demonstrating the molded article produced according to the manufacturing method of the model components corresponding to embodiment of invention. It is a figure for demonstrating the structure of the model components corresponding to embodiment of invention. It is a figure for demonstrating the cross-section of the model components corresponding to embodiment of invention.

  Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings. In each figure, the same reference numerals indicate the same elements. In each figure, the up, down, left, and right directions on the paper surface are used as the up, down, left, and right directions of the component (or part) in the present embodiment for the description in the text. In the embodiment described below, polystyrene is exemplified as a molding material in the embodiments described below, but the present invention is not limited to this, and the use of other materials (a thermoplastic resin such as polyethylene and ABS, a thermosetting resin, and a metal) is used. Is not to be excluded.

  First, the manufacturing method of the model components corresponding to embodiment of invention is demonstrated according to the flowchart of FIG. In S101, primary molding is performed to form a primary molding layer constituting the skeleton portion of the model part. As the molding material (raw material) of the primary molding layer, opaque polystyrene (PS) or reinforced polystyrene (KPS) can be used. Next, in S102, secondary molding for forming the 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 for the secondary molding layer, for example, transparent or translucent general-purpose polystyrene (GPPS) can be used. In subsequent S103, tertiary molding is performed to form a tertiary molding layer on the remaining portion of the surface of the primary molding layer so as to cover the primary molding layer. The secondary molding layer and the tertiary molding layer will form the outer surface (skin portion) of the model part, but depending on the thickness of the secondary molding layer and the tertiary molding layer, The next molding layer is formed so that the color is transparent.

  In the above process, the molding material constituting the primary molding layer is an opaque color (for example, blue, green, other colors such as solid color, metallic color, pearl color, etc.) or transparent (including translucent) ) (For example, blue, green, other colors), the molding material of the secondary molding layer and the tertiary molding layer has a transparent or translucent color. For example, when the model part constitutes a doll's hair part, the secondary molding layer and the tertiary molding layer constituting the surface are clear white (translucent white), whereas the primary molding layer is It can be dark blue or dark green. The color of the secondary molding layer and the tertiary molding layer and the color of the primary molding layer may be similar colors, or may be similar or opposite colors. In the present embodiment, the primary molding layer, the secondary molding layer, and the tertiary molding layer are thus formed of molding materials of different colors, and the secondary molding layer and the tertiary molding layer are made of a clear material, or By using a semi-transparent material, gradation can be expressed by allowing the primary molding layer under the different color to be seen through.

  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 combined and integrated with each other. In the above example, although PS, KPS, and GPPS have different properties, a common material is used as polystyrene. In addition to polystyrene, for example, ABS resin or polyethylene (PE) may be used in common. Moreover, you may use the raw material of a different material for a one part layer.

  The manufacturing method of the model part which consists of said 3 steps | paragraphs of shaping | molding processes can be implemented, for example using a multi-color molding apparatus. In each molding process, a molding die corresponding to the process is used. Specifically, a molding material is made to flow into a runner groove of the molding die and a molding space (cavity) for molding each part to form a molding, and after cooling, the molding is taken out from the molding die. About the molded object produced by primary shaping | molding and secondary shaping | molding, it attaches to the shaping | molding die of a next shaping | molding process, respectively, and secondary shaping | molding or tertiary shaping | molding is performed. Since the molding method itself using a multicolor molding apparatus is known, a more detailed description is omitted.

  In the above description, the case where the primary molding layer is molded by performing the molding process once has been described. However, the primary molding layer is divided into primary moldings according to the thickness of the primary molding layer to be molded. May be performed twice. In this case, the molding process to be performed is four stages. By molding the primary molding layer in two steps, it is possible to reduce molding depressions and distortions and to create a molded article having a uniform appearance.

  Next, with reference to FIG. 2, the molding procedure from the primary molding layer to the tertiary molding layer will be described according to the molding method of FIG. 1 corresponding to the present embodiment. FIG. 2 is a cross-sectional view of the mold and the molded product in the molding process. 2A and 2B correspond to the primary molding in S101. As shown in FIG. 2A, the mold (male mold 201 and female mold 202, male mold and female mold assignment may be reversed) corresponds to the primary molding layer to be molded. A cavity 203 is provided, and a molding material is introduced into the cavity 203 through a main runner and a sub runner (not shown) to form a part.

  Then, as shown in FIG. 2B, a molded product 204 is produced in the primary molding using the male mold 201 and the female mold 202. The molding 204 includes a main runner, a sub runner, and a primary molding layer. The molded product 204 is made of polystyrene (PS). The main runner is formed so as to surround the periphery of the component, and the component is fixed to the main runner by being connected to the main runner via the auxiliary runner. The main runner and the sub runner correspond to grooves for allowing the molding material to flow into the cavities 203 in the molds 201 and 202. In the primary molding of S101, the molding material is caused to flow into the cavity 203 from the main runner groove of the molds 201 and 202 through the secondary runner groove, and the cavity, the main runner groove, and the secondary runner groove are filled with the molding material. Then, the molded product 204 including the primary molded layer can be produced by cooling.

  Next, in the secondary molding of S102, a secondary molding layer is formed so as to cover the upper side of the primary molding layer. 2C and 2D correspond to the secondary forming in S102. As shown in FIG. 2C, a cavity 212 corresponding to the secondary molding layer to be formed in the secondary molding is formed between the molding die 211 and the molded product 204, and the cavity 212 is not in contact with the cavity 212. The molding material is allowed to flow through the illustrated main runner and auxiliary runner. Thereby, as shown in FIG. 2D, a molded product 213 including a secondary molding layer is formed, and at least a part of the primary molding layer is covered with general-purpose polystyrene (GPPS). The molded product 213 includes a main runner, a secondary runner, and a secondary molding layer. In the present embodiment, the secondary molded layer is formed by forming GPPS on the upper surface of the primary molded layer from the main runner via the sub runner. At this time, since the lower side of the primary molding layer is supported by the molding die 202, the molding 213 is placed so that the thickness of the secondary molding layer becomes a desired thickness without changing the position of the molding 204. It becomes possible to form accurately.

  In the secondary molding of S102, after the molded product 204 is fixed inside the molds 211 and 202, a molding material (GPPS) is caused to flow into the cavity 213 from the main runner groove through the auxiliary runner groove, and the cavity 213, The molded product 213 can be formed on the upper surface of the molded product 204 by filling all the runner grooves and the auxiliary runner grooves with the molding material and then cooling.

  Next, in the tertiary molding of S103, the tertiary molding layer is formed so as to cover the remaining surface of the primary molding layer. 2 (E) and 2 (F) correspond to the tertiary molding in S103. The molded product 223 is formed by covering the surface of the molded product 204 where the molded product 213 is not formed with a molding material. In the tertiary molding, the molding die 211 used in the secondary molding is arranged on the lower side, and the molding die 221 that forms the cavity 222 with the molding 204 is arranged on the upper side. Accordingly, the position of the molded product 204 on which the molded product 213 is formed by the molding die 211 is fixed, and it is possible to prevent the cavity 222 from changing in size in the tertiary molding. In this way, after fixing the molded product 204 formed with the molded product 213 to the inside of the molds 221 and 211, the molding material (GPPS) is caused to flow into the cavity 222 from the main runner groove through the auxiliary runner groove, The molded product 223 can be formed on the surface of the molded product 204 by filling the cavity, the main runner groove, and the auxiliary runner groove with the molding material and then cooling. As described above, the model part can be formed.

  In the present embodiment, the molding layer covering the primary molding layer is formed in two steps. However, if the molding layer is to be formed in one forming process, the molding 203 is placed in the cavity of the molding die. It will be placed in a state supported only by the runner. When the molding material flows in this state, the size of the cavities 212 and 222 changes due to the position of the molded product 203 being changed by the pressure, and as a result, the thicknesses of the secondary molding layer and the tertiary molding layer are changed. There is a risk that will not be the thickness that was planned. If the thickness varies, a desired color cannot be obtained in the appearance of the completed model part, which affects the yield. On the other hand, the yield can be improved by forming the molding layer covering the primary molding layer in two steps.

  Next, an example of the structure of a model part manufactured according to the manufacturing method of FIGS. 1 and 2 will be described with reference to FIG. FIG. 3A is a diagram showing an example of a model component 300 as a part of the hair of a doll toy produced by a molding process corresponding to the present embodiment. The outer surface 303 of the model part 300 is composed of a secondary molding layer and a tertiary molding layer, and a part of the primary molding layer covered with the secondary molding layer and the tertiary molding layer is a connection portion 301 and a runner 302. As exposed on the outside. In particular, the runner 302 is exposed on the surfaces of the secondary molding layer and the tertiary molding layer. The connection part 301 and the runner 302 function as a connection member for connecting to other components.

  FIG. 3B is a separation view in which the model component 300 is separated into a plurality of molding layers. FIG. 3B shows a case where primary molding is performed in two steps. That is, the primary molding layer is composed of the first molding layer 311 and the second molding layer 312, the secondary molding layer is composed of the third molding layer 313, and the tertiary molding layer is composed of the fourth molding layer 314. Is done. The first molding layer 311 and the second molding layer 312 form a skeleton part of the model part, and the third molding layer 313 and the fourth molding layer 314 form a skin part of the model part. Hereinafter, for the sake of simplicity, the first molding layer 311 and the second molding layer 312 are collectively referred to as a “frame portion”, and the third molding layer 313 and the fourth molding layer 314 are collectively referred to as an “outer skin portion”. Further, in FIG. 3B, the surface of the skeleton portion has a structure in which the entire skeleton is filled with a molding material without a gap. However, a comb-like or lattice-like structure including a gap between members may be used.

  In this embodiment, the outer skin part is formed so as to cover the skeleton part, and irregularities are formed on the surface thereof, and the thickness is adjusted by the irregularities. The outer skin part is a molding layer that forms the surface of the model component 200 and has a surface corresponding to the desired outer shape of the model. Since the model part 200 is a part of the hair of the doll toy, the hairstyle is expressed by the surface shape of the outer skin part.

  Comparing the shapes of the outer surfaces of the skeleton part and the outer skin part, it is configured to include a part that is similar to each other and a part that is not similar to each other. In the similar-shaped part, the thickness of the outer skin part is kept at a predetermined value. On the other hand, the non-similar part is formed to have a thickness different from that of the similar part, and the color of the skeleton part that can be visually recognized from the outside through the outer skin part according to the change in thickness. Change. For example, when the outer skin part is formed of a translucent (for example, clear white) material and the skeleton part is formed of a blue material, the blue color of the skeleton part may appear cloudy through the clear white outer skin part. Become. At this time, since the thickness of the outer skin portion is kept constant in the similar-shaped portion, the degree of cloudiness of the color of the skeleton portion seen through the translucent outer skin portion is constant. However, as the thickness of the outer skin portion increases, the degree of white turbidity increases and the color of only the outer skin portion is recognized in the portion where the skeleton portion does not exist. Further, when the thickness of the outer skin portion is reduced, the degree of white turbidity becomes weaker and the blue color becomes darker. Therefore, the shade can be changed by changing the thickness. Furthermore, by configuring the outer shape of the skeleton portion to be tapered, it is possible to express a state in which the color of the hair gradually changes from cloudy blue to white. Further, in the present embodiment, by molding so that the part where the skeleton part (color) is visible from the outer skin part and the part where the skeleton part is not included and the skeleton part (color) is not visible are continuous. Can express gradation by color change. Here, when an outer skin part is obtained by uniting two or more molding layers, at least one should just have the composition concerned.

  Next, the cross-sectional structure of the model component 300 corresponding to this embodiment will be described. FIG. 4A is a cross-sectional view exemplarily showing a cross section of a portion of the model component 300 in FIG. 3A where the thickness of the outer skin portion is maintained at a predetermined value. As shown in the cross-sectional view of FIG. 4A, the outer skin portion constituting the outer surface of the model component 300 has a thickness D1, and the overall thickness is uniform. In the portion configured as described above, the hue when the model component 300 is viewed from the outside is kept uniform. On the other hand, FIG. 4B is a cross-sectional view exemplarily showing a cross section of a portion of the model component 300 in FIG. As shown in the cross-sectional view of FIG. 4B, a part of the outer skin part constituting the outer surface of the model component 300 has a thickness D1, while the other parts have thicknesses D2 and D3. The thickness is D1 <D2 <D3. In the portion configured in this manner, the greater the thickness, the greater the degree of color mixing of the outer skin color with respect to the skeleton color, and the greater the change in hue when the model component 300 is viewed from the outside. . For example, when the outer skin portion is formed of a clear white material, the degree of cloudiness increases as the thickness increases, and the color of the skeleton portion is lighter in D2 than D1 and in D3 than D2.

  In this way, by changing the thickness of the outer skin partly or entirely, it is possible to change the hue when the model component 300 is viewed from the outside. At this time, in the portion where the thickness of the outer skin portion is continuously increased, the degree of color mixture of the outer skin portion color with respect to the color of the skeleton portion gradually increases, so from the location where the color of the skeleton portion can be seen through most darkly, Since the color gradually fades and changes to the color of the outer skin part, the observer can observe the gradation on the surface of the model part 300.

  The appearance of the gradation can be varied depending on the difference in how the thickness of the outer skin changes. For example, depending on whether the degree of change in thickness is steep or gradual, the way of changing from a dark color to a light color differs, so that different gradation expressions can be realized. Moreover, you may change in the direction which reduces thickness. As a result, the color can be changed from a light color to a dark color.

  As described above, according to the present embodiment, it is possible to provide a model part with gradation with stable quality and a manufacturing method thereof.

Claims (10)

A first layer formed of a first material of a first color;
A second layer formed to cover at least a part of the first layer, the second layer being made of a second material having a second color different from the first color. Model parts,
The second layer is configured to include a first portion where the first layer is visually recognized, and a second portion which is continuous with the first portion and where the first layer is not visually recognized .
The first layer is connected to a first runner formed of the first material, and the first runner is configured when the model part is combined with another model part to form a finished product. A model component used as a connecting member to the other model component.   The model component according to claim 1, wherein the second layer includes a portion having a different thickness in the first portion.   The model part according to claim 1, wherein the transparency of the first color is lower than the transparency of the second color.   The model component according to claim 3, wherein the second color is translucent.   The model component according to claim 3, wherein the first color is opaque and the second color is translucent.   The model component according to claim 3, wherein the first color is translucent and the second color is translucent. The model part according to any one of claims 1 to 6, wherein the first runner used as the connection member is exposed on a surface of the second layer. The model part according to any one of claims 1 to 7 , wherein the first material is polystyrene (PS), and the second material is general-purpose polystyrene (GPPS). A method of manufacturing a model part,
A first step of forming a first layer using a first material of a first color;
A second step of forming the second layer using a second material of a second color different from the first color so as to cover at least a part of the first layer;
A third layer is formed using the second material of the second color so as to cover at least a part of the surface of the first layer opposite to the surface on which the second layer is formed. And a third step of
In the second step, the second layer is molded in a state where the opposite surface of the first layer is supported,
In the third step, the third layer is molded in a state where the second layer is supported,
At least one of the second layer and the third layer includes a first portion in which the first layer is visually recognized, and a second portion in which the first layer is not visually recognized, continuous with the first portion. The method of manufacturing a model part is formed so as to include In the second step, the opposite surface of the first layer is supported using the mold used to mold the first layer in the first step,
10. The model component according to claim 9 , wherein in the third step, the second layer is supported by using a mold used to mold the second layer in the second step. Production method.