JPH0327913A - Mold for resin molding - Google Patents

Abstract

PURPOSE:To manufacture a durable mold for resin molding for manufacture a resin molded product of superior texture and strength by forming a recessed and projected pattern distinguishable visually on a recessed and projected molded surface and constituting said recessed and projected mold surface of a cured material of curable substance layer composed of an aggregate and a binder. CONSTITUTION:As a recessed and projected pattern with visually distinguishable recesses and projections is formed on a curing substance layer 2 constituting a recessed and projected mold surface 3 fixed to a mold 1 in the polymerized state by a master 4 having a recessed and projected surface with recesses and projections formed reversely to the recesses and projections of the recessed and projecting mold surface 3 to be formed, the depth of the recessed sections and height of the projected sections on the recessed and projecting mold surface 3 can be set easily and freely. The recessed and projecting mold surface 3 is not constituted simply of resin, but is constituted of a cured material of a curing substance layer 2 formed with an aggregate and a binder, and a mold of superior durability available for use under high pressure can be provided. Thus, a mold for molding to be able to mold a resin molded product with recessed and projected pattern of superior texture and high strength can be manufactured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a resin molding mold used for manufacturing various resin-shaped articles, and a method for manufacturing the same. A resin mold with a concave-convex mold surface for displaying a mold, that is, a resin mold that can produce a resin mold with a pattern of convexes and convexities on the surface, as well as a method for manufacturing the resin mold, as well as an engraving of the specification (contents). (no change). [Prior Art] Conventionally, as shown in FIG. 3, an uneven mold surface (3) was formed by etching the surface of a mold (1).

[Problem that the invention seeks to solve]

However, in this conventional method, since the unevenness is formed by etching the mold, all the heights of the convex parts on the mold surface are the same, and as a result, the depth of the concave parts of the pattern applied to the resin molded product is all the same. As a result, the resin or molded product cannot have sufficient texture.

An object of the present invention is to provide a mold for resin molding that can produce resin molded products with excellent texture.

It is an object of the second invention to provide a method for easily manufacturing a molding die capable of manufacturing a resin molded product with excellent texture and with a high yield.

[Means to solve the problem]

The characteristic structure of the resin molding mold according to the present invention is that the uneven mold surface is formed with a curable material layer that is hardened and adhered to the mold in a polymerized state. The effects of this are as follows.

[For production]

The curable material layer, which is adhered to the mold in a polymerized state and forms a concave-convex mold surface, has a concave-convex surface of the master, which has a concavo-convex surface whose concavities and convexities are reversed from the concave-convex mold surface to be formed. By turning it into a fluid state and polymerizing it in layers, it is possible to reliably and accurately mold the unevenness of the master uneven surface.
The depth of the recesses and the height of the projections on the uneven mold surface can be freely set.

〔Effect of the invention〕

Therefore, it has become possible to provide a mold for resin molding that can produce a resin molded article having a concavo-convex pattern with a rich variety of concavities and convexities and excellent texture.

[Means for Solving the Problem] The feature of the method for producing a resin mold according to the second invention is that a pattern of unevenness is formed using a hardening material layer that is hardened and adhered to the mold in a polymerized state. A method of manufacturing a resin mold having an uneven mold surface for imposing a shape. The method involves layering a curable material in a fluid state on an uneven surface, curing the curable material in this state, and then peeling off the flexible master to create a curable material layer with an uneven mold surface. The effects of this are as follows.

[For production]

1. Since a flexible master is used as the master for forming the uneven mold surface on the curable material layer, the master is superimposed on the curable material layer in a fluid state that is superimposed on the mold, or
When stacking the master on which the curable material layer in a fluid state is stacked on the mold, the master or the master with the curable material layer is gradually stacked from one end. By expelling the air in the hardening material layer, it is possible to make the hardening material layer completely free of air bubbles. When peeling off the master, by gradually peeling off from one end of the master, there is no need to apply unreasonable force to the curable material layer that would crush the irregularities as a result of this peeling.

〔Effect of the invention〕

Therefore, it has been possible to provide a method that can economically produce a mold that can produce a molded resin product with excellent texture, with good workability, and with a high yield and less defective products.

〔Example〕

This is a mold for producing a molded resin product with a pattern of unevenness, as shown in FIG.
1), an uneven mold surface (3) for forming the uneven pattern;
) fixes the shaped ceramic layer (2) in a polymerized state.

Next, a method for manufacturing the mold for a certain shape will be explained step by step.

■ As shown in Figure 2 (a), the surface of the mold {1} where the ceramic layer (2) is polymerized and fixed is covered with the ceramic layer {2}.
} is treated with a paste etc. to give it an uneven shape that is easy to adhere to, and then a fluidized ceramic (Sins etc.) is applied to this treated surface.
is applied in the form of a film to form the third/safety protection layer (at), while the uneven mold surface (3) to be shaped is formed into a flexible sheet-like material having an uneven surface (4a) in which the unevenness is reversed. Master (
4) A fluidized ceramic (A
A'sOaSIOL+, etc.) is applied in a film form to form a second daceramic layer (a4).

■ As shown in FIG. 2 (b), a fluidized ceramic (such as Sins) is applied in a film form to the first ceramic layer (a1) to form a second ceramic layer (a1),
A fluidized ceramic (such as Sins) is applied to the third ceramic layer (a4) to form a third ceramic layer (a3).

■ As shown in Figure 2 (c), each of the above-mentioned Sewomikku layers (
al) - (am). (as) and (a4) are cured, the ceramic layer (as) is heated so that the second ceramic layer (a1) and the third ceramic layer (a3) are in contact with each other.
．． Gradually stack the master (4) with (am) on top of each other from one end side, and when the tlrIII ceramic layer (a4) has hardened to the extent that it does not lose its shape, gradually peel off the master {4} from the one end side. , harden the ceramic,
Sewomink layer (2) with a four-layer structure having an uneven mold surface (3)
) is formed in a fixed state in the mold (1).

The standard thickness of the ceramic layer (2) is about 200μ.

[Another example]

■ Use resin as the curable substance.

■ Use resin containing aggregate as the hardening substance.

■ Ceramic containing metal etc. is used as the hardening substance.

■ A mixture of resin and ceramic is used as the hardening substance.

■ Use a hard material as the master (4).

■ The curable material layer (2) with the uneven mold surface (3) is fixed to the mold (1), and the surface of the mold (1) is coated with a curable material in a fluid state. The master (4) is superimposed on the coated curable material layer {2) and a mold is made, and then the master (4) is peeled off and prepared.

■ After forming the uneven mold surface (3) into a curable material layer (2) using the master (4), this uneven mold surface (3) is attached to the mold {3} using an adhesive or the like. Fix with adhesive.

[Brief explanation of drawings]

Figures 1 and 2 show examples; Figure 1 is a sectional view; Figure 2 is a sectional view;
Figures (a), (b), and (c) are manufacturing process diagrams. FIG. 3 is a sectional view showing a conventional example. (1)... Mold, (2)... Curable material layer, (3)... Uneven mold surface, (4)...
...Flexibility master (4a) ...Uneven surface. Figure 1

Claims (1)

[Claims] 1. An uneven mold surface (3) for forming a pattern with unevenness
A resin molding mold comprising: the uneven mold surface (3);
A mold for resin molding, comprising a curable material layer (2) which is cured and adhered to the mold (1) in a polymerized state. 2. The mold for resin molding according to claim 1, wherein the curable material layer (2) is a ceramic layer.