JP4088273B2 - Manufacturing method of lacquer products - Google Patents

Description

  The present invention relates to a method of manufacturing a lacquer product, particularly a lacquer product having a surface engraved.

  As a lacquer decoration method, the dry lacquer method has been known for a long time. The dry-drying lacquer method is often used for Buddha statues that have a hollow inside, and the classic method is to dry a model made of clay and then use cloth with lacquer on the surface of the clay. Is repeated several times to obtain a molded product having a predetermined thickness. Then, the clay inside is taken out, and the surface of the molded product is coated with black lacquer material, followed by surface polishing.

  Such a dedrying method has been applied to craft decorations and the like after various improvements have been made to materials and methods. However, this dry-drying lacquer method has a drawback that it is not suitable for a prototype with fine sculpture. That is, when creating a female mold from a prototype, it is difficult to remove the female mold from the prototype easily and without damage. For example, when a release agent is applied to a portion that becomes the back of the female mold, the release agent is applied thickly. However, the engraving becomes unclear, and conversely, if the release agent is applied thinly, it cannot be easily removed. For this reason, the precision of engraving must be suppressed.

  On the other hand, recently, a method using a gypsum mold as the female mold has been performed. In this method, after pouring gypsum around the original mold loaded in the outer frame, molding the gypsum mold, applying a release agent to this gypsum mold, and applying and applying a base lacquer material and cloth on it. Form. After this lamination is dried and solidified, the plaster mold is removed and black lacquer material or vermilion lacquer material is applied to the surface of the base lacquer material. Various releasing agents such as paraffin, petrolatum, sodium alginate, vegetable oil and the like are used (Non-patent Document 1).

"Study on Japanese Lacquer Works" by Goichi Sawaguchi, Art Publishing Co., Ltd., published July 10, 1945

  However, even with this method, there are still difficulties in reproducing the sculpted prototype as a lacquer product. That is, as described above, depending on the application amount of the release agent, there is a problem that unevenness of fine engraving becomes unclear, and even if fine powder is applied to improve the detachability, fine powder on the surface of the molded product There are problems such as formation of micropores due to, mixing of microbubbles, and cracks and fine line patterns due to these. Furthermore, this gypsum mold method requires the work of applying surface lacquer material such as black lacquer material or vermilion lacquer material to the surface of the base lacquer material of the semi-finished product after leaving the gypsum mold. There are problems such as increase in cost and cost.

  The technique of applying lacquer material directly to wood carving is also known, but when applying lacquer material to the uneven parts of the sculpture, especially when adjusting the viscosity of the lacquer material so that uneven coating and dripping do not occur Therefore, there is a problem that the price of the product is expensive, and a rebellion caused by drying occurs.

  The present invention has been proposed to solve the above-described problems. That is, the present invention manufactures a lacquer product that can express concavo-convex irregularities of a lacquer product that has conventionally been difficult to express at low cost, efficiently, and beautifully, such as a decorative product engraved. Is to provide a method.

The means of the present invention for solving the above problems is to apply a lacquer material to a female mold molded from an original mold with irregularities engraved on the surface, dry and solidify the lacquer material, and then remove the female mold. In the manufacturing method of lacquer products to be molded,
A first step of molding a female mold from an original mold with an elastic material having water repellency;
A second step of coating the female mold with a high-viscosity surface lacquer material that is a surface layer of a lacquer product;
A third step of coating wears base lacquer material to the surface lacquer material,
A fourth step of applying a back lacquer material to be the back layer of the lacquer product to the base lacquer material applied in the third step;
It is characterized by having.

The lacquer product in the present invention is not particularly limited, but is effective for engraved small articles, such as brooches, pendants, cufflinks and other accessories, sliding door nails, tiles and other furniture accessories. Such as decorations such as wall hangings and photo stands. In addition, lacquer products such as containers and boxes may be used. Moreover, a prototype is a modeled object that is the original shape of a product obtained by processing a material such as wood or gypsum, and a modeled object whose surface is engraved is suitable for the manufacturing method of the present invention.

  Examples of the water-repellent elastic material include silicon rubber, silica rubber, and fluorine rubber. Among them, silicon rubber that is available at a relatively low cost and excellent in moldability and durability is preferable. By using such a water-repellent elastic material for the female mold, even if the lacquer material is directly applied to the female mold, the female mold has good detachability and it is necessary to apply a release agent. No, or just apply thinly.

  The surface lacquer material applied in the second step is a lacquer material that appears on the surface of the product, such as black lacquer material, red lacquer material, and color lacquer material obtained by mixing a pigment with lacquer material. This surface lacquer material has a high viscosity. The reason is that since the female mold has water repellency, the lacquer material does not uniformly adhere to the female mold at normal viscosity. The viscosity of the surface lacquer material is adjusted according to the unevenness precision of the lacquer product used and the weather conditions of the day.

  The base lacquer material in the third step is applied as a connection with the surface lacquer material, the back lacquer material described later, and the core material. For example, raw lacquer material mixed with glue, ground powder, etc. is used. The

The back lacquer material in the fourth step is the same lacquer material as the surface lacquer material, but the type and color of the lacquer material may be changed from the surface lacquer material. Moreover, since a back surface lacquer material does not contact a female type | mold, the lacquer material of normal viscosity can also be used.

On the other hand, the manufacturing method of the lacquer product of the present invention is
In the manufacturing method of the lacquer product, after applying the lacquer material to the female mold molded from the original mold with engraved irregularities on the surface, drying and solidifying the lacquer material, the female mold is detached and molded,
A first step of molding a female mold from an original mold with an elastic material having water repellency;
A second step of coating the female mold with a high-viscosity surface lacquer material to be a surface layer of a lacquer product;
A third step of applying a base lacquer to the surface lacquer;
A fourth step of depositing a core on the underlying lacquer material,
A fifth step of applying a back lacquer material to be the back layer of the lacquer product to the core material deposited in the fourth step;
It is characterized by having.

  The core material in the fourth step is attached to make a thick layer according to the size and thickness of the product, for example, linen, gypsum rust, cotton rust, wood pieces, engraved lacquer, cotton engraved lacquer Cloth engraving lacquer.

The female mold may be created directly from the prototype created by a designer or the like, but it is preferable to create a template prototype once from the prototype. That is, the present invention is characterized in that it is a template prototype created from the following steps (a) to (c) as a pre-step of the first step.
(A) a step of molding a female mold from an original mold with an elastic material having water repellency;
(B) A step of injecting a high-viscosity lacquer material mixed with a hardener into the female mold, and drying and solidifying the lacquer material molded product,
(C) polishing the lacquer molded product,
By molding a new female mold from such a template prototype, fine scratches and deposits that are inevitably generated on the surface of the first prototype are not transferred to the final lacquer product, resulting in a more beautiful surface shape. The lacquer product you have can be manufactured.

According to the inventions of claims 1 to 4 described above, unevenness that has been engraved on the surface of a lacquer product that has conventionally been difficult to express, such as engraved ornaments, at low cost and efficiently The effect that can be expressed beautifully.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In this embodiment, a pendant will be described as an example of a lacquer product.

(1) Creation of template prototype FIG. 1 shows an original prototype 1 of a pendant modeled by a designer or the like. Here, for the sake of simplicity, an example is shown in which the H-shaped engraving part 2 is engraved on the surface of a piece of wood that has been processed into a disk shape. Are shaped into various forms.

  In the present invention, first, a template prototype is created from the prototype 1 as a pre-process. That is, as shown in FIG. 2, a cylindrical outer frame 3 is placed so as to surround the prototype 1 placed on the flat plate 4 and so that the prototype 1 is located at the center. Thereafter, a predetermined amount of soft silicon rubber (vulcanized rubber) 5 is loaded inside the outer frame 3 and pressed by the pressing plate 6 from above. After the silicon rubber 5 is cured, the silicon rubber 5 with the original mold 1 loaded is pulled out from the bottom opening of the outer frame 3 and the original mold 1 is removed. As shown in FIG. 3, the shape of the original mold 1 is transferred. A female mold 7 made of silicone rubber is molded. Concavities and convexities of the engraving portion 2 of the prototype 1 are transferred to the surface recess 8 of the female die 7.

  Next, as shown in FIG. 4, a female die 7 with the surface recess 8 facing upward is inserted into the outer frame 3, and a high-viscosity lacquer material 9 mixed with a hardener is poured into the entire surface recess 8. The pressure plate 6 is pressed. The reason why the mixture of the lacquer material and the curing material having a high viscosity is used here is because the drying time is shortened, the hardness as a prototype, and the detachability from the female mold 7 are taken into consideration. After the lacquer material 9 is dried and solidified, the female mold 7 is pulled out from the outer frame 3, and the lacquer material 9 molded by the female mold 7 is removed. The entire surface of the molded product is polished with an abrasive or a file to remove fine convex portions on the surface or engraving. The molded product created in this way becomes the template prototype 10. The overall shape of the template prototype 10 is the same as that of the prototype 1 shown in FIG.

(2) Creation of female mold The female mold 11 made of silicon rubber shown in FIG. Since this production method is the same as that of the silicon rubber female die 7 described above, description thereof is omitted here.

(3) Creation of product First, surface lacquer material 13 such as a black lacquer material, a red lacquer material, or a colored lacquer material having a high viscosity is applied to the entire surface of the surface recess 12 of the female mold 11. At that time, it should be sufficiently applied also to the narrow part of the concavo-convex part to be the engraving part 2. Conventionally, since the lacquer material is applied from the surface side of the product, delicate care such as adjusting the coating amount was necessary so that the unevenness was not crushed in the engraving portion 2 or the like. Even if there is some unevenness, since only the surface in contact with the female surface recess 12 appears as the surface, it can be applied more roughly than in the prior art.

  Then, the surface lacquer material 13 is dried and solidified. Lacquer material is dried and solidified under moderate humidity and temperature conditions by the action of an enzyme called laccase contained in lacquer material. Usually, the temperature is 20-30 ° C. and the humidity is 65-80% RH. It is performed in an environment maintained in conditions.

  After the surface lacquer material 13 is dried and solidified, a base lacquer material 14 to be connected is applied to the surface and dried and solidified by the same method as described above. Depending on the size, thickness, and the like of the product, a core material (not shown) such as linen is attached to the surface of the base lacquer material 14 and then dried and solidified as described above. Thereafter, the back lacquer material 15 is applied to the surface of the base lacquer material 14 or the core material, and the back lacquer material 15 is dried and solidified.

  Finally, the product 20 is removed from the female mold 11, and the entire surface coated with the lacquer material is polished to give a gloss finish peculiar to the lacquer material. In the lacquer product thus obtained, the original form shown in FIG. 1 is accurately reproduced, and the lacquer material is beautifully applied to the entire surface.

It is the perspective view which showed the prototype used in the embodiment of the present invention. It is the cross-sectional schematic for demonstrating the female type | mold preparation in the front process of this invention. It is the cross-sectional schematic of the female type | mold created by the front process of this invention. It is the cross-sectional schematic for creating the model prototype in the pre-process of this invention. It is the cross-sectional schematic for demonstrating the manufacturing method of the lacquer product of this invention.

Explanation of symbols

1 and 10 are prototypes (model prototypes)
2 is an engraving portion 3, an outer frame 4, a flat plate 5, silicon rubber 6, a pressing plate 7, a female mold 8, a female mold 9, a lacquer material 11 in which a hardener is mixed, and a female mold 12 made from a template prototype is female. Mold recess 13 is surface lacquer 14 is base lacquer 15 is back lacquer

Claims (4)

In the method of manufacturing a lacquer product, after applying a lacquer material to a female mold molded from an original pattern with irregularities engraved on the surface, drying and solidifying the lacquer material, the female mold is detached and molded,
A first step of molding a female mold from an original mold with an elastic material having water repellency;
A second step of coating the female mold with a high-viscosity surface lacquer material that is a surface layer of a lacquer product;
A third step of coating wears base lacquer material to the surface lacquer material,
A fourth step of applying a back lacquer material to be the back layer of the lacquer product to the base lacquer material applied in the third step;
The manufacturing method of the lacquer product characterized by having. In the method of manufacturing a lacquer product, after applying a lacquer material to a female mold molded from an original pattern with irregularities engraved on the surface, drying and solidifying the lacquer material, the female mold is detached and molded,
A first step of molding a female mold from an original mold with an elastic material having water repellency;
A second step of coating the female mold with a high-viscosity surface lacquer material that is a surface layer of a lacquer product;
A third step of applying a base lacquer to the surface lacquer;
A fourth step of depositing a core on the underlying lacquer material,
A fifth step of applying a back lacquer material to be the back layer of the lacquer product to the core material deposited in the fourth step;
The manufacturing method of the lacquer product characterized by having. The prototype of the first step, as a pre-step of the first step, the following (a) ~ The process of claim 1 or claim 2, characterized in that a template prototype created from the (c) Manufacturing method of lacquer products.
(A) a step of molding a female mold from an original mold with an elastic material having water repellency;
(B) A step of injecting a high-viscosity lacquer material mixed with a curing material into the female mold and drying and solidifying the lacquer material molded product,
(C) polishing the lacquer molded product, The lacquer product manufacturing method according to any one of claims 1 to 3 , wherein the female mold is silicon rubber.

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