JPH01241500A - Production of precious metal composit form - Google Patents

Abstract

PURPOSE:To obtain an inexpensive, highly decorative form with a noble appearance due to a combination of the tone of a precious metal and the texture of a resin, by coating a precious metal plate with a transparent resin to obtain a composite plate, and hot-or cold-forming the composite plate. CONSTITUTION:A plulality of Au plates and Pt plates 2 are prepared as precious metal plate blanks, are then superposed on each other alternately in the order of Au and Pt, and are fed into a diffusion welder, in which degassing, heating and pressurizing are conducted to obtain a laminate 3. The laminate 3 is subjected to repeated hot rolling and cold rolling to obtain a laminate 5. The laminate 5 has a golden color on both sides thereof. One side of the laminate 5 is irradiated with a laser beam from a yttrium-aluminum-garnet laser generator 6, whereby the first layer (Au) is removed in the form of a groove, and the second layer is exposed. With the irradiating position varied, a pattern is marked on the surface of the laminate 5. The laminate 5 is then cut to a desired size, is sandwiched between two transparent acrylic resin plates 7, and the sandwich is heated and worked by a hot press to obtain a composite plate. The composite plate 8 is subjected to thermocompression forming to obtain a pen stand.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention provides a precious metal composite molded article that is highly decorative, can be produced at low cost, and is suitable for use as souvenirs, gifts, and daily necessities. Regarding manufacturing methods.

"Prior Art" Conventionally, when pictograms are applied to plastic products, they are usually colored with paint. In addition, when adding value by making a metallic color appear on the product, chemical plating is applied to the plastic, or electrochemical plating is applied on top of the chemical plating. When a pattern is applied by plating, the area other than the pattern is covered with a shielding film, and only the pattern area is plated.

"Problem to be Solved by the Invention" However, in the conventional technology described above, even if a pattern is applied to the resin surface by metal plating or coloring, the material feel of the resin itself is lost, and the three-dimensional appearance is not achieved. It becomes dull and uninteresting. In addition, since the paint or plating is attached to the surface, there is a concern that it will peel off after long-term use, and it does not look good as a decorative item and does not suit the recent trend toward luxury.

"Means for Solving the Problems" In order to solve the above problems, the present invention covers a noble metal plate with a transparent resin to form a composite plate, and then heats or cold coats the composite plate. It is designed to be molded. When a pattern is to be applied, the pattern may be applied to the noble metal plate itself by an appropriate method, or the pattern may be applied to the resin. An appropriate molding method may be adopted depending on the properties of the resin. For example, in the case of thermosetting resin, when covering precious metals, the curing reaction is stopped midway,7 and the composite plate is heated in a mold or molded into a mold and then heated to finally harden. let In the case of thermoplastic resin, it may be formed into summer plywood and then molded while heating.

One way to add a pattern to a precious metal plate is to construct the precious metal plate by laminating multiple materials with different colors, and then irradiate the surface with a laser beam to make the four inner layers come out and mark the pattern. suitable.

``Function J'' In this method of manufacturing a precious metal composite molded body, the composite plate is constructed by covering the outside of the precious metal plate with resin, and when this resin is molded hot or cold, the precious metal inside is removed. It deforms plastically as the resin deforms.The precious metal itself is not in direct contact with processing tools such as molds, and its movement is not restricted, so the strain rate does not increase and it does not break during molding. In a molded object processed in this way, the precious metal plate can be seen through the transparent resin layer, so the color tone of the precious metal and the texture of the resin combine to create an elegant appearance. By making the resin layer as thin as possible and making the resin layer thick, it is possible to obtain a molded article that is inexpensive and highly decorative.

"Example" Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a brush holder manufactured by this manufacturing method. The manufacturing method will be explained below.

First, as shown in Figure 2, as a precious metal plate material, width: 50m+++X length = 6011IIi x thickness 0
Au plate 1 (A
After preparing 10 sheets of PT plate 2 (Pt: 99.99 wt%) and 9 sheets of PT board 2 (Pt: 99.99 wt%) as the same white material, degreasing them, stacking them alternately in the order of Au and Pt, and diffusion welding. It is charged into a machine, deaerated, heated, and pressurized until it reaches a thickness of 8.
The laminated body 3 has a thickness of 6 mm (see FIG. 3). Subsequently, hot rolling and cold rolling are repeated using rolls 4 to obtain a 25 μm thick laminate (precious metal plate) 5 (see Fig. 4).
.

The exterior color of this laminate 5 is golden yellow on both sides. When one side is irradiated with a laser beam from a YAG (yttrium-aluminum-garnet) laser generator 6,
The first layer (Au) on the surface is removed in a groove shape, the second layer is exposed, and when the irradiation position is changed, a pattern is marked on the surface (see FIGS. 5 and 6). For example, by combining the generator 6 with a suitable control device, it is possible to input a figure and then mark it as a pattern or character. By changing the intensity of the irradiation, the depth of the unevenness that forms the pattern can be adjusted as appropriate.
In this example, two types of precious metals are stacked to form the structure 1. However, it is also possible to create a rough color tone by providing many layers of three or more types of gold decoys.

The laminated board 5 marked with this pattern was cut to a diameter of 170 mm, and then sandwiched between two transparent acrylic boards (!) 7 of the same size and 3 mm thick, heated to 180°C, and pressed with ten-node pressure; summer plywood 8 (see Figure 7).

In order to form this composite plate 8 into a brush holder, it was heated to 140°C in an electric heating furnace and pressure-molded to form a brush holder with a diameter of 6 (1+ m) and a height of 100 III 11. Puff polishing was performed to eliminate rough skin.The surface of this brush holder is golden yellow, and a three-dimensional white pattern appears on the surface.Although most of the brush holder is made of resin 7, it is also decoratively elegant. , has high commercial value.Furthermore, even when used as a brush holder, the resin 7 and the internal laminate 5 are protected mechanically or chemically, so it is durable and retains its value for a long time.

Note that although the above embodiment is an example in which a pattern is applied to a noble metal plate using a laser beam, other methods such as plating or coloring may be used. Further, a pattern may be attached to the temporary acrylic material, or there may be no pattern at all. Further, in the above example, the noble metal plates are laminated, but a single plate may be used, and the plate thickness may be thicker or thinner.

"Effects of the Invention" As described above, the present invention covers a noble metal plate with a transparent resin to form a composite plate, and then performs hot or cold molding on this composite plate. Therefore, various molded bodies can be constructed by molding resin using a noble metal plate as a core.

Since the precious metal plate is visible through the transparent resin layer, the color tone of the precious metal and the texture of the resin combine to create an elegant appearance.

By making the noble metal plate as thin as possible and making the resin layer as thick as possible, it is possible to obtain a molded article that is both inexpensive and highly decorative.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention. Figure 1 is a diagram of a manufactured brush holder, Figure 2 is a diagram showing the process of stacking the material plates, and Figure 3 is a diagram showing the stacking process. Figure 4 is a diagram of the plates being diffusion bonded, Figure 4 is a diagram of rolling them, Figure 5 is a diagram of irradiation with a laser beam, Figure 6 is a partially broken and enlarged diagram,
FIG. 7 is a sectional view of the composite plate. ■, 2... Material board, 5... Laminated board (precious metal plate), 7... Tree III, 8... Composite board.

Claims (1)

[Claims] A composite plate is formed by coating a precious metal plate with a transparent resin,
A method for producing a precious metal composite molded body, which is characterized by subjecting this composite plate to hot or cold molding.