JPH09164536A - Manufacture of colored multilayered structure of surface of silicone rubber human body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the manufacturing of the replica of some part of a human body in color tone with more natural than ever by a method wherein a multilayered structure is formed by piling up liquid silicone rubbers classified by color, which are charged to predetermined positions in a press tool and hardened, in order of color. SOLUTION: First of all, matrix press tools on the back side of a hand and the palm side of a hand formed as the original form of the shape of a finger are formed. A layer 1 representing a nail, a pinkish layer 2 within the nail, a layer 3 representing the lunula of the nail and a reddish layer 4 at the tip of the nail are charged in the press tools. A layer 5 representing the tan, drying-up and the like of the skin, a layer 6 representing the whole redness intrinsic to the finger, layers 7 and 8 emphasizing the redness at the joint part and the side surface part of the finger are charged in the press tools. Next, layers 9 and 10 representing the fundamental flesh tint and the running of skin veins, layers 11 and 14 representing skin lines and palm side veins and a layer 15 covering the whole deepest part are charged in the press tools. A liquid silicone rubber representing the flesh tint layer 9 is filled in the remaining gap and hardened so as to unload a replica.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a multi-layer structure in which a copy of a part of a human body such as a finger made of silicone rubber has a more natural color tone than conventional products. .

[0002]

2. Description of the Related Art Conventionally, a technique for producing a replica of a part of a human body using silicone rubber or the like has already been established as a medical technique. After coloring with a coloring material and adding a catalyst, a part of the human body having a normal shape is modeled in advance, and a part of the human body is further modified to make the shape of the human body surface faithful. After filling the plaster mother die press die made for the reproduced prototype, closing the mold and hardening it by applying pressure, remove burrs etc. of the duplicate, and color it as necessary. It was an attempt to reproduce a natural color tone, but in addition to expressing the shape of the duplicated product, expressing a natural color tone requires a high level of technology and depends on the skill and feeling of the operator. It was

[0003]

According to this conventional method, the silicone rubber which is partially colored appropriately at the time of press molding is sectioned and inserted into the press die without relying on the superficial coloring applied to the duplicate. Therefore, even if an attempt is made to express the color tone, it takes about 3 to 24 hours for the liquid silicone rubber mixed with the catalyst to cure at room temperature. Therefore, before the silicone rubber is cured in the press mold. There was a case where the portion moved from the intended portion or a portion raised to a certain thickness was drip and deviated from a predetermined position. Further, since the press die is closed and pressure is applied to cure the color, the pressure sometimes causes the color to shift to an unexpected position. Especially for the reproduction of the natural feeling of duplicated hands and fingers,
It is not possible to express with the basic skin color that is similar to existing toys and other molded products with surface coloring of nails, but it is important to express color tone with layers that are accurately color-coded. Is. However, in order to form a multi-layered structure with layers that are accurately color-coded according to the conventional method, the layer filled in at a predetermined position loses fluidity and is cured to some extent so that the next layer can be stacked. Until
Although it is necessary to wait for curing while correcting the dripping, it is practically impossible because it takes a huge amount of time to perform it on all layers. The present invention is made to eliminate these drawbacks.

[0004]

A liquid silicone rubber is set so that it loses its fluidity within a few minutes after mixing at room temperature by a catalyst and is cured within a few minutes. It is color-coded and filled into a predetermined position in the press die. Then, while being cured, the layers are stacked in order of color to form a multilayer structure. It is a method for producing a color-coded multilayer structure of a body surface of a silicone rubber human body, which comprises the above production method.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a process for producing a duplicate of a finger according to the present invention will be described with reference to the drawings. First, the tenoko side shown in FIG. And, the state where the mother die press die on the Tenohira side shown in FIG.
As shown in the figure, the cross section of the side surface is as shown in FIG. Then, the liquid silicone rubber to be used is preliminarily subjected to the predetermined coloring required for each of the following layers. Then, the liquid silicone rubber loses its fluidity within a few minutes after being mixed with a catalyst at room temperature, and is set to cure in a few minutes. . On the Tenoko side, it is as follows. (A) As shown in FIG. 5, a milky white anti-transparent layer (1) having almost the same thickness as a living body with respect to the portion showing the shape of the nail on the surface of the mold press die on the Tenoko side. Fill in. (B) Next, as shown in FIG. 6, a pinkish layer (2) inside the nail was formed one layer deep in the same mother die press type layer (1) expressing the nail, as viewed from the epidermis side. ) And a white layer (3) near the base of the nail representing the half moon of the nail. (C) Next, as shown in FIG. 7, a layer (1) expressing the nail, a pinkish layer (2) inside the nail, and a half moon of the nail of the mother-mother press type are expressed. The layer (3) is completely covered and the reddish layer (4) of the fingertip is filled in rather than the color of the entire Tenoko side. (D) Next, as shown in FIG. 8, in the surface layer other than the layer (1) expressing the nail and the reddish layer (4) of the fingertip portion of the same mother press type, Fill with a layer (5) that is very light brown and expresses sunburn and dryness on the skin. (E) Next, as shown in FIG. 9, the skin is deeper than the epidermis side of the layer (5) expressing the above-mentioned sunburn and dryness of the skin of the same mother type press type, and the skin Exclude the fingertips by covering the layer (5) expressing sunburn, dryness, etc.
A layer (6) expressing redness due to whole blood is filled. (F) Next, as shown in FIG. 10, the layer (6) expressing the reddishness due to the whole blood of the same mother type press type is partially deeper, and the joint part of the finger hand is Layers (8) and (8) that adjust the redness of the side parts so that the color of the side parts that shift from the Tenoko side to the Tenohira side of the same color as the layers (7) and (7) that emphasize redness gradually shift Fill in. (G) Next, as shown in FIG. 11, a layer (5) expressing the above-mentioned sunburn and dryness of the skin of the same mother type press type, a layer (6) expressing redness due to the whole blood, It is at the deepest part of the layers (7) (7) that emphasize the redness of the joints of the fingers and the layers (8) (8) that adjust the redness of the sides, and are generally called, Irojiro, Asagro, A layer that expresses the basic skin color of a human being by mixing an appropriate amount of red, shortly carved fibers, which expresses individual or racial skin color differences such as yellow and mimics the presence of capillaries there. Fill in (9). (H) Next, as shown in FIG. 12, the layer (9) expressing the basic skin color of the mother-mother press type was partially deeper in the layer and bluish under the skin. A streak-like layer (10) representing the running of cutaneous veins is filled. As described above, the color-coded layers are sequentially filled in the mother die press die on the Tenoko side in the above-described order, and the layers are stacked while curing each layer to form a multilayer structure. Further, on the Tenohira side, the following is performed. (L) As shown in FIG. 13, the surface of the mold press die on the tenohira side has a ridge that indicates a primary wrinkle called a skin line caused by flexion of the finger joints, which is more than the color of the entire tenohira side. It is reddish brown and runs linearly. In order to make it clear, a layer expressing the skin line (1
1) Fill (11). (N) Next, as shown in FIG. 14, a layer expressing the redness of the fingertip portion, which is on the surface layer of the mother press type and has a thickness gradually decreasing from the fingertip to almost the central portion. (12) and a layer (13) that is less reddish than the fingertip portion is inserted from the center portion of the surface layer, which is uneven, to the base of the finger. (L) Next, as shown in FIG. 15, the running of the palm-side vein of a translucent purple skin vein running so as to cross the deep portion near each skin line in the mother mold press die is expressed. Layer (1
4) Fill (14) and (14). (2) Next, as shown in FIG. 16, the layers (11) and (11) expressing the skin line, the layer (12) expressing the redness of the fingertip, and the finger in the same mother die press die. A layer that suppresses redness from the apex (13), a layer that expresses the running of the volar vein (14)
(14) A layer that covers the entire deepest part on the Tenohila side with a color that is a deepest part of (14) and is a mixture of anti-transparent skin color with a little redness (1
Fill in 5). As described above, the color-coded layers are sequentially filled in the mother die press die on the side of Tenohira in the order as described above, and the layers are stacked while curing each layer to form a multilayer structure. And finally, with respect to the deepest part on both the tenohira side and the tenoko side, which remains in the state where both mother die press dies are combined,
The liquid silicone rubber used in the layer (9) for expressing the basic skin color is sufficiently filled in both of the mother die press molds, the molds are closed and cured, and then the molds are opened to show in FIG. Take out the duplicated product, and take bb ', cc', d on FIG.
The cross section taken along the line d'is shown in FIGS. 18, 19 and 20.

[0006]

[Examples] The silicone rubber used was KE1300T from Shin-Etsu Chemical Co., Ltd. and CL, a fast-acting curing agent from Shin-Etsu Chemical Co., Ltd.
A-4 and a curing accelerator X-93-405 are used. This silicone rubber called KE1300T is originally
Although it is an industrial molding silicone rubber that cures at room temperature and has high dimensional accuracy, it is a two-component type, the curing reaction type is an addition type, it does not produce reaction by-products, and it can be colored with a coloring agent. Also, it has almost the same properties as medical silicone rubber for face and body prostheses (sill skin by Tackray) and can be used as a material for molded articles. 10% of the specified amount of CLA-4 for this KE1300T
The time required for curing when mixed with is 8 hours at 25 ° C according to the manufacturer's announced value, but it can be cured by further adjusting the amount of X-93-405 for the purpose of promoting curing. The time can be reduced to a few minutes. FIG. 21 shows the time until the fluidity disappears after mixing due to the difference of 10% of the specified amount of CLA-4 and further added X-93-405 to KE1300T, and the results are summarized in the table. It is a thing. Such a rapid curing reaction is not usually required for industrial molding silicone rubbers, but it is often used for silicone rubber-based impression materials for taking a precise dental mold in dentistry.
The present invention uses the rapid curing reaction as described above to arbitrarily set the curing time of the liquid silicone rubber that can be used as the material for the molded article. Then, as shown in FIG. 21, X-
Increasing the addition amount of 93-405 shortens the time until the fluidity suddenly disappears. In order for the liquid silicone rubber containing the catalyst to be completely cured, it takes about 1 to 3 times longer than the time required for the liquid silicone rubber to have no fluidity after mixing, but at a predetermined position in the press mold. The filling operation of the liquid silicone rubber can be performed only while the liquid silicone rubber has fluidity. Therefore, in the meantime, the filling operation is finished at a predetermined position in the press die, and while the curing is advanced to some extent, the next operation is performed after waiting for the next layer to be stacked. As described above, the present invention loses fluidity within a few minutes after mixing at room temperature with a catalyst for a curing time that originally required several hours or more for a room temperature curable liquid silicone rubber that has been colored in advance,
The liquid silicone rubber is set so that it cures in a few minutes. It is color-coded and filled into a predetermined position in the press die. After that, the multilayer structure is formed by sequentially stacking the layers in color order while curing the layers one by one with the mold kept open. The manufacturing process of the duplicated finger made by using the above-mentioned structure is as follows. The mother mold press mold used is a model of a living body directly modified and modified, and the prototype made of wax etc. is reproduced as a female mold, and even the surface features of the living body are detailed. Use what you can express. The material used for the surface of the mold is
Gypsum is generally used in the medical field, but resins such as epoxy, polyester, and urethane which have a certain degree of mechanical strength and dimensional stability may be used. The shape of the mother die press die is divided into two planes. The die die press die shown in FIG. 1 and the tenohira die die die shown in FIG. 2 are shown in FIG. 3 when both die die press molds are combined. The cross section of the side surface is as shown in FIG. First, a mold release agent such as petrolatum is applied to the surface of the mother die press mold of gypsum so that the silicone rubber does not adhere to it. Next, a liquid silicone rubber that is colored in a predetermined manner with a coloring agent, which is necessary for each layer constituting the multilayer structure shown below, is prepared.
The liquid silicone rubber is set so that it loses fluidity within a few minutes after mixing with a catalyst at room temperature and then cures within a few minutes, but if the time until fluidity disappears after mixing is set to 10 minutes, press The liquid silicone rubber filled in a predetermined position in the mold is prone to liquid sagging, which makes it difficult to achieve the original purpose of the invention, and if the time until the fluidity is lost is set to 1 minute, the operating time However, there is a possibility that the resin will not be sufficiently secured and will be cured during the filling operation. Therefore, in this example, the time until the fluidity disappeared after mixing was basically about 5 minutes (X-93-405 was changed to KE
Addition of about 6% with respect to -1300T). Then, the layers are filled in the following order while being cured one by one. On the Tenoko side, it is as follows. (A) As shown in FIG. 5, a milky white anti-transparent layer (1) having almost the same thickness as a living body with respect to the portion showing the shape of the nail on the surface of the mold press die on the Tenoko side. Fill in. Since this layer is on the surface and has a dish shape that is constricted with many layers, it can be easily distinguished and filled. (B) Next, as shown in FIG. 6, a pinkish layer (2) inside the nail was formed one layer deep in the same mother die press type layer (1) expressing the nail, as viewed from the epidermis side. ) And a white layer (3) near the base of the nail representing the half moon of the nail. The pinkish layer (2) inside the nail and the layer (3) expressing the half moon of the nail completely cover the layer (1) expressing the nail, but be careful not to protrude. To enter. (C) Next, as shown in FIG. 7, a layer (1) expressing the nail, a pinkish layer (2) inside the nail, and a half moon of the nail of the mother-mother press type are expressed. The layer (3) is completely covered and the reddish layer (4) of the fingertip is filled in rather than the color of the entire Tenoko side. (D) Next, as shown in FIG. 8, in the surface layer other than the layer (1) expressing the nail and the reddish layer (4) of the fingertip portion of the same mother press type, Fill with a layer (5) that is very light brown and expresses sunburn and dryness on the skin. Instead of using a spatula for filling, take a small amount of liquid silicone rubber on the operator's fingertips and spread it out like a thin line. (E) Next, as shown in FIG. 9, the skin is deeper than the epidermis side of the layer (5) expressing the above-mentioned sunburn and dryness of the skin of the same mother type press type, and the skin Exclude the fingertips by covering the layer (5) expressing sunburn, dryness, etc.
A layer (6) expressing redness due to whole blood is filled.
This layer is not so thick as the pinkish layer (2) inside the nail, but since it is thin, it is also spread evenly with the fingertips without using a spatula or the like. (F) Next, as shown in FIG. 10, the layer (6) expressing the reddishness due to the whole blood of the same mother type press type is partially deeper, and the joint part of the finger hand is Layers (8) and (8) that adjust the redness of the side surface are added so that the color of the side surface that shifts from the Tenoko side to the Tenohira side of the same color as the layers (7) and (7) that emphasize redness gradually shifts. To enter. Since the layers (8) and (8) for adjusting the redness of the side surface portion are on the side surface portion, the curing speed should be set a little early so as to be careful of the liquid dripping after the filling. (G) Next, as shown in FIG. 11, a layer (5) expressing the above-mentioned sunburn and dryness of the skin of the same mother type press type, a layer (6) expressing redness due to the whole blood, It is at the deepest part of the layers (7) (7) that emphasize the redness of the joints of the fingers and the layers (8) (8) that adjust the redness of the sides, and are generally called, Irojiro, Asagro, A layer that expresses the basic skin color of a human being by mixing an appropriate amount of red, shortly carved fibers, which expresses individual or racial skin color differences such as yellow and mimics the presence of capillaries there. Fill in (9). This layer is divided into two parts and filled as described later. (H) Next, as shown in FIG. 12, the layer (9) expressing the basic skin color of the mother-mother press type was partially deeper in the layer and bluish under the skin. A streak-like layer (10) representing the running of cutaneous veins is filled. As described above, the color-coded layers are sequentially filled in the mother die press die on the Tenoko side in the above-described order, and the layers are stacked while curing each layer to form a multilayer structure. Further, on the Tenohira side, the following is performed. (L) As shown in FIG. 13, the surface of the mold press die on the tenohira side has a ridge that indicates a primary wrinkle called a skin line caused by flexion of the finger joints, which is more than the color of the entire tenohira side. It is reddish brown and runs linearly. In order to make it clear, a layer expressing the skin line (1
1) Fill (11). This layer expresses wrinkles that appear due to flexion of each joint. When the joint is extended, it becomes reddish-brown and when it is bent, it becomes dark brown. If the degree of flexion is further increased, the wrinkles themselves become deeper and it is not necessary to color-code them. Therefore, the liquid silicone rubber is colored and filled in consideration of the characteristics of the living body. When filling, set the curing speed to a low level so that it does not drip, and use bamboo skewers to quickly fill it into thin strips so that it overlaps the skin lines on the surface of the mother die press die. . (N) Next, as shown in FIG. 14, a layer expressing the redness of the fingertip portion, which is on the surface layer of the mother press type and has a thickness gradually decreasing from the fingertip to almost the central portion. (12) and a layer (13) that is less reddish than the fingertip portion is inserted from the center portion of the surface layer, which is uneven, to the base of the finger. The concavo-convex shape of this layer is given by tapping it with the tip of a tooth brush or the like immediately before the fluidity disappears after filling this layer. (L) Next, as shown in FIG. 15, the running of the palm-side vein of a translucent purple skin vein running so as to cross the deep portion near each skin line in the mother mold press die is expressed. Layer (1
4) Fill (14) and (14). Similarly to the layer (11) expressing the skin line, the layer (14) expressing the running of the palm side vein also observes the characteristics of the living body well to determine the number, position and the like. (2) Next, as shown in FIG. 16, the layers (11) and (11) expressing the skin line, the layer (12) expressing the redness of the fingertip, and the finger in the same mother die press die. A layer that suppresses redness from the apex (13), a layer that expresses the running of the volar vein (14)
(14) A layer that covers the entire deepest part on the Tenohila side with a color that is a deepest part of (14) and is a mixture of anti-transparent skin color with a little redness (1
Fill in 5). As described above, the color-coded layers are sequentially filled in the above-mentioned master die of the tenohira side in the order as described above, and the layers are stacked while curing each layer to form a multilayer structure. And finally, the liquid silicone rubber used in the layer (9) that expresses a basic skin color to the deepest portions on both the Tenohira side and the Tenoko side where the two mold dies remain in a combined state. Are fully filled in both of the mother die press molds and the molds are closed and cured. In this operation, a sufficient operation time is allowed without particularly increasing the curing speed. As a result, the mother die press die is completely filled with the liquid silicone rubber. The layer (10) expressing the running of the skin veins is a layer expressing the basic skin color as shown in FIG. 18 by the layer (9) expressing the basic skin color, which is divided and filled. (9)
Will exist inside. Then open the mold and first
The duplicated product shown in Fig. 7 is taken out, and burrs and the like are removed to complete. Then, bb ', cc', dd 'in FIG. 17 thereof.
The cross section taken along the line is as shown in FIG. 18, FIG. 19 and FIG. As described above, this example was conducted in summer, but in winter, the curing rate does not become slow as the room temperature decreases, so it is expected that the addition amount of X-93-405 needs to be set to a large amount. Note that it is not necessary to wait for the complete curing in the filling operation of each layer. This is because stacking the next layer on top of the fully cured layer can significantly reduce the adhesion between layers, resulting in delamination between layers in the finished replica.

[0007]

[Effect] The replica of the finger manufactured as described above has, for example, a nail having a semitransparent and constant thickness of a healthy pink color and a white half moon, and a sunburned skin, by appropriate coloring of each layer. Through the color of the veins, partial penetration of the color of blood flowing through the capillaries to the skin epidermis, redness of each joint part of the Tenoko side finger (fushishi of the finger), and from the inside The difference in the individual skin tones reflected and the reddishness of the capillaries, which is full of life, are subtly expressed through the epidermis, and the overall color tone is felt as a natural and lively skin color. If this method is used, the part intentionally colored by the operator does not accidentally shift. The curing speed may also be adjusted according to the size of the product to be manufactured, the degree of difficulty due to the difference in the parts of the human body, and the skill of the manufacturer. The change in color tone in each living body is also expressed by changing the coloring of some layers. For example, the difference in color tone due to sunburn of the skin in summer and winter is expressed by changing the thickness of the layer (5) that expresses sunburn and dryness of the skin, and it has a bluish complexion with a bloody tone and a hot reddish tinge. The difference in flesh color can be obtained by changing the density of the layer (6) that expresses the overall redness and the amount of fibers in the layer (9) that expresses the basic flesh color so that individual skin conditions can be more closely followed. Can be expressed in In the same way, duplicates of hands, feet and their fingers can be made, and can be applied to other parts requiring clear color coding, such as breast and areola. Also, for other body surfaces that do not require clear color coding,
A layer that expresses the sunburn and dryness of the skin (5), a layer that expresses the overall redness (6), a layer that emphasizes the redness of the joints of the fingers (7), which is used for the color expression on the side of Tenoko, and is basically By forming a multi-layered structure with a layer (9) that expresses a smooth skin color and a layer (10) that expresses the travel of skin veins, it is possible to express an unprecedented beautiful color tone. Therefore, if this method is introduced into medical-use silicone rubber, its safety to the human body is confirmed, and legal approval is obtained, it should contribute to the advancement of medical technology. In addition, this multilayer structure has a thickness from the surface layer
With a few millimeters, it is possible to express a sufficiently beautiful color tone. Therefore, in order to reduce the weight, the inside can be made hollow, and it is also possible to use the voids to put in mechanical structures having joint functions, and if they can be electrically controlled, future It can fully respond to technological progress. In addition, if industrial silicone rubber can be used to produce mass-produced products with an industrial press mold that has mechanical strength, it will be possible to make realistic human body reproductions that have never existed before, and can be applied to the manufacture of mannequin dolls, toys, and accessories. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a mother die pressing die (tenoko side) for producing an embodiment using the present invention.

FIG. 2 is a perspective view of a mother die press die (tenohira side) for producing an embodiment using the present invention.

FIG. 3 is a perspective view in a state where two mother die press dies on the Tenoko side and the Tenohira side are combined.

4 is a sectional view taken along line aa 'in FIG.

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG.

FIG. 13

FIG. 14

FIG.

FIG. 16 is a plan view showing a manufacturing process in a mother die press die of an embodiment using the present invention.

FIG. 17 is a perspective view of an embodiment using the present invention.

FIG. 18 is a sectional view taken along line bb ′ of FIG. 17.

FIG. 19 is a sectional view taken along the line cc ′ in FIG.

20 is a sectional view taken along the line dd 'in FIG.

FIG. 21 is a table showing changes in the time until the fluidity of the molding silicone rubber used in the examples disappears.

[Explanation of symbols]

 1 Layer that expresses nails 2 Pinkish layer inside nails 3 Layer that represents half-moon of nails 4 Layer that is reddish at fingertips 5 Layer that represents sunburn and dryness of skin 6 Whole blood Layer that expresses redness due to 7 Layer that emphasizes redness of finger joints 8 Layer that adjusts redness on the side 9 Layer that expresses basic skin color 10 Layer that expresses skin veins 11 Layer that expresses skin lines 12 Layer that expresses redness of fingertips 13 Layer that suppresses redness from fingertips 14 Layer that represents running of volar vein 15 Layer that covers the entire deepest part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B32B 25/20 B32B 25/20 // B29K 83:00

Claims (1)

[Claims] 1. A liquid silicone rubber, which is set so that it loses its fluidity within a few minutes after mixing with a catalyst at room temperature and cures within a few minutes, is color-coded and filled into a predetermined position in a press mold. Then, a method for producing a multi-layered color-coded body surface of a silicone rubber human body, characterized in that the multi-layered structure is formed by stacking in order of color while curing.