JPH0126851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a decorative body with high decorative properties, which is particularly suitable for use as window materials, optical ceiling materials, etc. The purpose is to obtain.

Such a structure of the present invention is such that a thermosetting synthetic resin liquid is poured onto the first flexible mold, a second flexible mold is placed on the resin liquid, and then the first flexible mold/thermosetting resin liquid is poured onto the first flexible mold. A laminate consisting of a thermosetting synthetic resin liquid/second flexible mold is placed between male and female hard molds with irregularities formed therein, and shaped by the pressure of the male and female hard molds, and then the thermosetting synthetic resin liquid is cured. In the method for manufacturing a decorative body, a male and female hard mold with no radial wrinkle pattern engraved on its inner surface is used as the male and female hard mold, and a first flexible mold and/or a second flexible mold with low elongation is used. By using a flexible mold, the concave central part and/or
Or, it is characterized by forming a wrinkle pattern radially around the convex tip.

The method of the present invention will be explained in detail below. In the present invention, as the flexible mold with low elongation used as the first and/or second flexible mold, a film-like material with low elongation such as polyester film, cellophane, fluorine film, etc. is used. These film-like materials may be used as they are with a smooth surface, or may be mechanically wrinkled to provide many irregular and disorderly uneven surfaces, or regular uneven surfaces may be formed using an embossing roll or the like. May be used as a surface. This flexible mold with low elongation is used for the first and second
Although it is preferable to use it for both flexible molds, it is also possible to use only the first or second flexible mold. In this case, the other flexible mold is, for example, a rubber having a removable synthetic resin layer as the outermost layer. Even something with stretch, such as a sheet, is acceptable.

Next, a step-by-step explanation will be given. The first flexible mold described above is placed on a horizontal receiving plate such as a steel plate or a decorative board, and then a thermosetting synthetic resin liquid is poured onto the first flexible mold.
The thermosetting synthetic resin liquid used here is:
Unsaturated polyester resin, epoxy resin, epoxy acrylate resin, etc. can be used. A curing accelerator, catalyst, pigment, dye, etc. are added to these thermosetting synthetic resin liquids as necessary. Here, when pouring the thermosetting synthetic resin liquid onto the first flexible mold, a glass fiber reinforcing material such as glass cloth is poured in order to increase the strength of the finished decorative body. It may also be embedded in a synthetic resin liquid.
Furthermore, natural and/or artificial decorative elements may be embedded alone or in combination with the reinforcing material in order to provide decorative variation to the decorative body.

Next, the second flexible mold is placed on top of the thermosetting synthetic resin liquid. Then, the laminate consisting of the first flexible mold/thermosetting synthetic resin liquid/second flexible mold is removed from the receiving plate and placed between a pair of male and female hard molds, and is pressed against the hard molds. Twist and shape. (Note that the thermosetting synthetic resin liquid in the laminate before shaping may proceed to harden and become gel-like, but it must not be completely cured.) During this shaping, at least one of the Since the surface is covered with a flexible mold with little elongation, the flexible mold does not conform to the shape of the hard mold to be pressed, and the pressing force acts concentrated on the convex portion of the hard mold. Therefore, a flexible mold with little elongation around the convex portion cannot follow the shape of the rigid mold, and irregular radial wrinkles form around the area where the pressing force is concentrated.

Although there are no particular restrictions on the male and female hard molds used here, it is better to use metal or synthetic resin molds that have a concave or square concave shape with sharply tapered irregularities to prevent wrinkles. Good penetration and preferred. Next, the thermosetting synthetic resin liquid formed while being held between the first and second flexible molds is either cured at room temperature or heated while being held between the male and female hard molds, or is removed from the mold. After being cured to a state where it does not lose its shape, it is removed from the male and female hard molds and cured at room temperature or by heating.

Conventionally, in order to obtain such a wrinkle pattern, the desired wrinkle pattern was carved into the inner surface of the mold itself.
The wrinkle pattern was faithfully formed by injecting synthetic resin into such a mold, or by vacuum forming or press forming.

However, carving the subtle wrinkles into the mold was time-consuming and costly, and was not profitable, and it also had the disadvantage that only a fixed wrinkle pattern could be obtained, which lacked interest. As described above, by using flexible molds with low elongation as the first flexible mold and/or the second flexible mold, the present invention enables the use of inexpensive male and female hard molds without creating wrinkle patterns on the male and female hard molds. Subtle radial wrinkles can be obtained, and the wrinkles can be created not in a fixed pattern but in random and interesting wrinkles.

Example A bank-like square frame is provided on an iron plate, and a mechanically wrinkled cellophane, which is a first flexible mold with little elongation, is placed thereon. Next, a light-transmitting thermosetting synthetic resin liquid having the following blending ratio is poured onto the cellophane.

Composition: Unsaturated polyester resin 100 parts by weight 6% Cobalt naphthenate 1 part by weight Methyl ethyl ketone peroxide 1 part by weight Colorant 0.5 part by weight Next, as a reinforcing material, a light-transmitting thermosetting synthetic resin having almost the same optical refractive index as the light-transmitting thermosetting synthetic resin was used. A glass fiber mat is embedded in the thermosetting synthetic resin liquid, and another cellophane, which is the same as the first flexible mold and has less elongation, is placed on top of it, and the thermosetting synthetic resin liquid and the second Eliminate the air trapped between the cellophane and the flexible mold in step 2. The thermosetting synthetic resin liquid is lifted from the next iron plate while being sandwiched between the first and second flexible molds, and placed between a pair of male and female rigid metal molds each having a large number of rectangular pyramid shapes. A load of /cm ² was applied for 50 minutes to form the sample. Subsequently, the male and female hard molds were heated to 100°C and heated for 1 hour. Next, the load on the male and female hard molds was removed, the molds were opened, the shaped molded body was taken out, unnecessary parts around the periphery were cut off, and the covered first
The second flexible mold was then peeled off from the thermosetting synthetic resin to obtain a light-transmitting decorative body. This decorative body has irregularities shaped by the square pyramid shape of male and female hard molds, and the irregularities have beautiful radial wrinkles and are random, so it has an extremely high decorative effect. It was hot.

Claims (1)

[Claims] 1. After pouring a thermosetting synthetic resin liquid onto the first flexible mold and placing a second flexible mold on top of the resin liquid, this first flexible mold/thermosetting synthetic resin liquid/first The laminate made of the flexible molds No. 2 is placed between the male and female hard molds each having an uneven shape, and is shaped by the pressure of the male and female hard molds, and then the thermosetting synthetic resin liquid is cured. In the manufacturing method, a male and female hard mold having no radial wrinkle pattern engraved on its inner surface is used as the male and female hard mold, and a first flexible mold and/or
Or a decorative body having a radial wrinkle pattern, characterized in that the wrinkle pattern is formed radially around a concave center portion and/or a convex tip portion by using a flexible mold with low elongation as a second flexible mold. manufacturing method.