JP6539364B1 - Model parts and manufacturing method of model parts - Google Patents

Abstract

[PROBLEMS] To provide a model part to which gradation is applied with stable quality and a method of manufacturing the same.
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 comprising And a second layer made of a second material of a second color different from the color of the first color, wherein the second layer is an area where at least a portion of the second layer is thinner than another portion. Model parts characterized by including.
[Selected figure] Figure 1

Description

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

  Parts of the assembly model (also called parts) called so-called plastic model (registered trademark), for example, when coloring the face of a toy, one place, one hand, coloring with human hand, or coloring Coating with a spray is performed using a mask provided with an opening (see Patent Document 1). Moreover, what automated coating using the coloring apparatus provided with the several printing machine and the conveyor is also proposed (refer patent document 2).

Japanese Utility Model Application Publication No. 3-34226 JP-A-8-47585

  However, it is difficult to stabilize the quality because it requires skill to apply gradation in which colors gradually become darker. Moreover, when using the coloring apparatus for coating, there also exists a problem that additional installation investment and an installation become large.

  Then, an object of this invention is to provide the model component in which the gradation was given by the stable quality, and its manufacturing method.

The present invention for solving the above problems is a model part, and
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 of a second color different from the first color Model parts,
The second layer viewed contains at least a portion of the thickness is thinner than the other partial regions,
The region is formed to include a portion thinner than a first thickness which allows the first color to pass through the second material and be visible from the outside of the model part.
The model part is a runner for fixing the model part and the second layer on the surface constituting the appearance of the finished product when the model part is combined with other model parts to constitute a finished product. Connect and
The first layer is connected to the runner on a surface that does not constitute the appearance of the finished product when the model component constitutes the finished product .

  According to the present invention, it is possible to provide a model part to which gradation is applied with stable quality and a method of manufacturing the same.

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 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. It is a figure for demonstrating the molded object produced according to the manufacturing method of the model components corresponding to embodiment of invention.

  Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings. In the drawings, the same reference numerals indicate the same elements. Further, in each drawing, the upper, lower, left, and right directions with respect to the sheet are used as the upper, lower, left, and right directions of parts (or parts) in this embodiment in the description in the text. The present invention exemplifies polystyrene as a molding material in the embodiments described below, but is not limited thereto, and uses of other materials (polyethylene, thermoplastic resin such as ABS, thermosetting resin, metal, etc.) Does not exclude

  First, a method of manufacturing a model part corresponding to an embodiment of the invention will be described according to the flowchart of FIG. In S101, primary molding is performed to form a primary molding layer that constitutes the skeleton of the model part. As a molding material (material) of the primary molding layer, reinforced polystyrene (KPS) can be used. Next, in S102, secondary molding is performed on the upper side of the primary molding layer to form a secondary molding layer so as to cover the primary molding layer. For example, general purpose polystyrene (GPPS) or high impact polystyrene (HIPS) can be used as a molding material for the secondary molding layer. In the subsequent S103, tertiary forming is performed on the upper side of the secondary forming layer to form a tertiary forming layer so as to cover the secondary forming layer. The molding material for the third molding layer can use the same KPS as the first molding layer. Although the third molding layer will form the outer surface of the model part, its thickness is partially different, and the portion formed thin has the color of the second molding layer formed on the lower side. It is formed to be thin enough to be transparent.

  In the above process, the molding materials constituting the primary molding layer and the tertiary molding layer have the same kind and color. On the other hand, the molding material of the secondary molding layer is at least different in color as compared with the molding materials of the primary molding layer and the tertiary molding layer. The secondary molded layer can be a color having a higher concentration than the primary molded layer and the tertiary molded layer. For example, when the model part constitutes the face or body part of a doll, the tertiary molded layer constituting the surface has a skin color, whereas the secondary molded layer has a dark skin color or a dark orange color, It can be dark pink etc. The color of the tertiary molding layer and the color of the secondary molding layer may be similar or may be similar or opposite to each other. In this embodiment, the third molding layer and the second molding layer are thus formed of molding materials of different colors, and the third molding layer is thinly formed thereon, and the second molding of a different color thereunder is formed By making the layer visible, it is possible to express gradations.

  Moreover, about the material of the molding material of each shaping | molding layer, in order to combine and integrate a primary shaping | molding layer, a secondary shaping | molding layer, and a tertiary shaping | molding layer mutually, it can be set as a common material. In the above example, the difference is in the properties of KPS, GPPS, HIPS, but a common material is used as polystyrene. Besides polystyrene, for example, ABS resin, polyethylene (PE) or the like may be commonly used. Further, materials of different materials may be used for some layers.

  The method for producing a model part consisting of the above three steps of molding steps can be carried out using, for example, a multicolor molding apparatus. In each molding process, a mold corresponding to the process is used. Specifically, a molding material is made to flow into a runner groove of a 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 molding and secondary molding, secondary molding or tertiary molding is performed by being attached to the molding die of the next molding process, respectively. Since the molding method itself using a multicolor molding apparatus is known, more detailed description is omitted.

  FIG. 2 is a view for explaining an example of the structure of a model part manufactured according to the manufacturing method of FIG. FIG. 2A is a view showing an example of a model component 200 as a part of the body of the doll toy, which is produced by the three-step molding process corresponding to the present embodiment. FIG. 2 (B) is a separation view in which the model part 200 is separated from the primary molding layer into the tertiary molding layer. As shown in FIG. 2 (B), the primary molded layer 201 forms a skeleton of the body. This frame has a comb-like or lattice-like structure including gaps between members, but the structure is merely an example, and the entire frame may be filled with a molding material without gaps.

  The secondary molded layer 202 is formed so as to cover the primary molded layer 201, and has irregularities formed on the surface thereof, and the thickness of the tertiary molded layer 203 is adjusted by the irregularities. The tertiary molded layer 203 is a molded layer that forms the surface of the model, and has a surface according to the desired outer shape of the model. Since the model part 200 is a part of the torso of the doll toy, the surface shape of the tertiary molded layer expresses the lines of the abdominal muscle, waist waist and the like.

  When the secondary molding layer 202 and the tertiary molding layer 203 are compared, the secondary molding layer 202 is a portion having a similar shape (a shape obtained by reducing the tertiary molding layer 203) of the tertiary molding layer 203 and a portion having no similarity. And is configured to include. The thickness of the tertiary molded layer 203 is maintained at a predetermined value in the similar shaped part of the secondary molded layer 202. On the other hand, the portion which is not similar is raised (formed convex) than the portion which is similar, whereby the tertiary molded layer 203 is formed thinner than a predetermined value. Here, the predetermined value corresponds to the thinnest thickness among the thicknesses of the tertiary molded layer which make the secondary molded layer not visible from the outside through the tertiary molded layer.

  Next, the cross-sectional structure of the model component 200 corresponding to the present embodiment will be described. FIG. 3A is a cross-sectional view exemplarily showing the A-B cross section of the model part 200 of FIG. As shown in the cross-sectional view of FIG. 3A, it can be seen that the thickness of the tertiary molded layer 203 that constitutes the outermost surface of the model part 200 differs depending on the location of the model part 200. For example, when the thicknesses D1, D2, and D3 are compared, D1> D2 ≒ D3. Here, D1 is assumed to have the smallest thickness (corresponding to the thickness of the predetermined value described above) in the region where the secondary molding layer 202 can not be seen through from the surface of the tertiary molding layer 203. Further, D2 and D3 each have the thickness of the thinnest portion in a region where the secondary molding layer 202 can be seen through from the surface of the tertiary molding layer 203. D2 and D3 may be thinner than the thickness of the predetermined value of D1.

  In the present embodiment, the numerical values of D1, D2 and D3 can be D1 = d1 (for example, 1 millimeter) and D2 = D3 = d2 (for example, 0.5 millimeter). However, this is merely an example, and the values d1 and d2 may be smaller or larger depending on the property (transparency) of the material to be used. Alternatively, if it is desired to change the degree of transparency of the ground depending on the place, the thinnest value in the area may be set to a different value. For example, D2 may be 0.5 mm, and D3 may be 0.7 mm.

  By forming the third molded layer 203 partially thin in this manner, the color of the second molded layer 202 located inside the third molded layer 203 can be observed from the outside of the model component 200. It becomes possible. FIG. 3B is a view for explaining the case where the color of the secondary molded layer 202 can be observed from the outside of the model part 200 through the tertiary molded layer 203. As shown in FIG. 3B, the transmission region 204 is formed at a position where the thickness of the tertiary molded layer 203 is thin.

  At this time, the thickness of the tertiary molded layer 203 changes from d2 at the thinnest value to d1 at which the base is seen through and the transmission region 204 is the thickest at the thinnest value and the color of the secondary molded layer 202 at the base is The observer gradually observes the gradation on the surface of the model part 200 because the color gradually fades from the part where it is seen through to the color of the tertiary molded layer 203 itself.

  The appearance of the gradation can be made different depending on how the change from d2 to d1 is made. For example, different gradation expressions can be realized because the way of changing from dark color to light color is different depending on whether the degree of change in thickness is made steep or gentle. For example, when it is desired to partially produce a dark color, the change from d2 to d1 may be made steep. On the other hand, when it is desired to make the transition from the dark color to the light color to the material color of the tertiary molded layer 203, the change from d2 to d1 is made gentle. For example, in a circular area centered at a position where thickness d2 is assumed, the thickness is increased in the radial direction from the center, and it is assumed that the thickness d1 is obtained at the position of radius r from the center. When r is increased, the change becomes gentle, and when the radius r is decreased, the change becomes steep.

  Further, although the value of d1 is fixedly determined in the case of the same molding material, the value of d2 can be variable, so the value of d2 may be changed according to the gradation mode to be expressed. If the color to be expressed may be lighter than the deepest value in the area where the gradation is to be added, for example, the value of d2 can be 0.7 mm instead of 0.5 mm.

  Next, with reference to FIG. 4, according to the molding method of FIG. 1 corresponding to the present embodiment, the configuration of a molded product formed by sequentially molding the first to third molded layers will be described. FIG. 4A is a view showing an example of a molded product 400 molded by primary molding. FIG. 4B is a view showing an example of a molded product 410 molded by secondary molding. FIG. 4C is a view showing an example of a molded product 420 molded by tertiary molding.

  In the primary molding of S101 of FIG. 1, a molded article 400 is first produced. The molding 400 is composed of a main runner 401, a secondary runner 402, and a part 403. Molding 400 is formed of reinforced polystyrene (KPS). The main runner 401 is formed to surround the periphery of the part 403, and the part 201 is fixed to the main runner 401 by being connected to the main runner 401 via the secondary runner 402. The main runners 401 and the secondary runners 402 correspond to grooves for flowing the molding material into the cavity corresponding to the part 403 in the first molding die (generally composed of a male die and a female die) not shown. . In the primary molding of S101, a molding material (KPS) is made to flow from the main runner groove of the first mold via the secondary runner groove into the cavity corresponding to the part 403, and the cavity, the primary runner groove and the secondary runner groove After filling all of the molding material with the molding material, the molding 400 can be produced by cooling.

  Next, in the secondary molding of S102, a molded article 410 is produced. Molding 410 is formed by covering molding 400 at least in part with general purpose polystyrene (GPPS) or high impact polystyrene (HIPS). The molded product 410 is composed of a main runner 411, a secondary runner 412, and a part 413 in addition to the molded product 400. In the present embodiment, the component 413 is formed by forming GPPS or HPPS on the surface of the component 403 from the main runner 411 via the secondary runner 412. The main runner 411 is fixed to the main runner 401 by connecting with the secondary runner 402. Further, the part 413 is fixed to the main runner 401 via the main runner 411 by being connected to the main runner 411 via the secondary runner 412.

  As with the main runner 401 and the like, the main runner 411 and the secondary runner 412 correspond to grooves for flowing the molding material into the cavity corresponding to the part 413 in the second molding die (not shown). In the secondary forming of S102, after the formed product 400 is fixed in the second forming die, the forming material (in the cavity corresponding to the part 413 from the main runner groove of the second forming die through the sub runner groove) A molded article 410 can be produced by flowing in GPPS or HIPS), filling the molding material in all the cavities, the main runner grooves and the secondary runner grooves, and then cooling.

  In addition, when performing secondary shaping | molding, the runner groove | channel is arrange | positioned only in the upper and lower sides of the components 413. FIG. This is due to the following reasons. First, the part 413 is a part of the doll's body, and the upper and lower parts are configured to be connected with other parts. Therefore, the upper and lower surfaces corresponding to the connecting surface are not exposed to the surface of the finished doll toy. On the other hand, the side is the doll's body itself and will be exposed on the surface of the finished doll toy. At that time, if the connection with the secondary runner remains on the side, the appearance of the finished product will be affected. Therefore, when the molded product 410 is molded by secondary molding, the runner grooves are arranged so as to supply the molding material from a direction that does not affect the appearance of the finished product.

  Next, in the third molding of S103, a molding 420 is produced. Molding 420 is formed by covering molding 410 at least in part with KPS. The molded product 420 is composed of a main runner 421, a secondary runner 422, and a part 423 in addition to the molded product 410. Although the surface of the molding 420 is covered with KPS, at least the exposed part of the finished doll toy should be covered with KPS, and the entire molding 420 needs to be covered with KPS. Absent.

  The main runner 421 is formed to surround the periphery of the part 423. Although the circumference is surrounded in FIG. 4C, the main runner 421 may be provided only on the left side or the right side. The part 423 is connected to the main runner 421 via the secondary runner 422. In FIG. 4C, since the molding 420 is viewed from the front side, the connection between the secondary runner 422 and the part 423 is hidden behind the secondary runner 402 and there is a portion that is not shown. The secondary runner 422 and the part 423 are connected on the back side of the secondary runner 402. Further, the secondary runner 422 is connected to the primary runner 401 or the secondary runner 402, and the component 423 is fixed to the primary runner 401 by the connection.

  As with the main runner 401 and the like, the main runner 421 and the secondary runner 422 correspond to grooves for flowing the molding material (KPS) into the cavity corresponding to the part 423 in the third molding die (not shown). . In the third molding of S103, after the molding 410 is fixed in the third molding die, the molding material is placed in the cavity corresponding to the part 423 from the main runner groove of the third molding die through the sub runner groove. A molding 420 can be produced by inflowing, filling the molding material in all of the cavity, the main runner groove and the secondary runner groove, and then cooling.

  Thus, the molded product 420 can be molded. As shown in FIG. 4C, it is all KPS secondary runners that are connected to the side of the molded object 420, and no GPPS or HPPS secondary runners are present on the side, and it is up and down Only exists. Therefore, the connection surface with the runner of GPPS or HPPS material does not remain on the torso surface of the finished doll toy.

  In the above description of the embodiment, the method of performing secondary forming and tertiary forming after first forming a part corresponding to the skeleton of the part by primary forming has been described. However, embodiments of the invention are not limited to this procedure. For example, the primary molding may be omitted and the secondary molding may be started at places where there is no need to produce a skeletal part.

  It is considered that it is necessary to produce a skeleton in the case of producing a part which can not expose the material of secondary molding on the surface, such as the body described in the above embodiment. For example, in the case of a doll toy, parts such as the torso, arms, and legs are assumed to be exposed on the surface, and for such parts, a skeleton is made to ensure fixation to the runner. If a frame is not prepared for such a part, the main runner and the secondary runner are formed only by the secondary molding layer produced in secondary molding, and the part before tertiary molding is a secondary produced in secondary molding Only the runner will be connected to the main runner. In the secondary molding layer, since the injection direction of the molding material is limited so that the connection portion of the runner is not exposed on the surface of the doll toy, the connection to the main runner becomes weak, and the injection pressure at the time of molding the tertiary molding material May not stand. Moreover, when not producing a frame | skeleton, components will be connected in the left-right direction of the main runner by the secondary runner produced in tertiary molding. In this case, the third molding layer produced in the third molding is thin, and the connecting portion of the part and the secondary runner is relatively weak in order to make the connecting portion as thin as possible without leaving a connection mark on the part surface. As it becomes a thing, it becomes difficult to fix a molding to a runner certainly. On the other hand, when the skeleton is produced by primary molding, the connection portion between the part and the secondary runner penetrates the secondary molding layer and the tertiary molding layer to secure the connection of the parts. , Can increase the strength of the connection part. In this case, if the molding materials constituting the primary molding layer and the tertiary molding layer are made to have the same color as in this embodiment, the connection portion between the part of the skeleton formed by the primary molding and the secondary runner. Since it becomes difficult to stand out because the same color penetrates the third molding layer, it is preferable in improving the appearance of the finished product.

  For the above reasons, it is desirable to perform primary molding on parts where exposure of the secondary molding layer on the finished product surface is to be avoided. On the other hand, parts that are exposed on the surface but are not exposed because they are covered and hidden by other parts, such as the face of a doll toy, can be concealed by the hair parts at the end. The primary molding may be omitted and the secondary molding may be started. Moreover, even if it is an arm or a torso, in the case where a part not exposed to the surface is included by separately attaching a decorative item, it is possible to secure the connection with the runner in the part hidden by the decorative item. Next molding may be omitted.

  Further, although the case where the color of the material used in the secondary molding is one color has been described, materials of a plurality of colors may be overlapped and used. For example, although the above-mentioned embodiment explained the case where the color of the tertiary molding layer which forms the surface of a doll toy is skin color, and the color of the secondary molding layer is orange or pink, in order to give shading, A black layer may be further formed under the secondary molding layer. At that time, by adjusting the thickness of the layer in the same manner as the above embodiment, it is possible to adjust the way of giving shading.

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

Claims (9)

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 of a second color different from the first color Model parts,
The second layer viewed contains at least a portion of the thickness is thinner than the other partial regions,
The region is formed to include a portion thinner than a first thickness which allows the first color to pass through the second material and be visible from the outside of the model part.
The model part is a runner for fixing the model part and the second layer on the surface constituting the appearance of the finished product when the model part is combined with other model parts to constitute a finished product. Connect and
The model part characterized in that the first layer is connected to a runner on a surface which does not constitute the appearance of the finished product when the model component constitutes the finished product .   The model part according to claim 1, wherein the density of the first color is higher than the density of the second color.   The model part according to claim 1, wherein the first color and the second color are colors having a similar color relationship, a similar color relationship, or an opposite color relationship with each other. The second layer, in the region, from the first thickness thinner second thickness than, the preceding claims, characterized in that it is formed to vary the first thickness The model part described in any one of 3 . The model part according to claim 4 , wherein the second thickness is a half thickness of the first thickness. The model part according to any one of claims 1 to 5 , further comprising a third layer made of the second material covered with the first layer. The model part is a runner for fixing the model part and the third layer in a plane constituting an appearance of the finished product when the model part is combined with another model part to constitute a finished product. The model part according to claim 6 , further comprising: A method of manufacturing model parts,
Forming a first layer using a first material of a first color;
Forming a 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;
In the second step, the second layer is formed so as to include a region in which at least a portion of the thickness is thinner than the other portions,
The region is formed to include a portion thinner than a first thickness which allows the first color to pass through the second material and be visible from the outside of the model part.
In the first step, when the model part is combined with another model part to constitute a finished product, the first material is a direction corresponding to the surface of the model component which does not constitute the appearance of the finished product. Provided
In the second step, when the model part is combined with another model part to constitute a finished product, the second process is performed from the direction including the direction corresponding to the surface of the model component which constitutes the appearance of the finished product. the manufacturing method of the material is provided, characterized in Rukoto. The method further includes a third step of forming a third layer of the second material before the first step,
In the first step, the first layer is formed to cover the third layer,
In the third step, when the model part is combined with another model part to constitute a finished product, the second process is performed from the direction including the direction corresponding to the surface of the model component which constitutes the appearance of the finished product. A method according to claim 8 , wherein the material of is provided.