JPS5923693B2 - Molding method for laminate products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a paper-based phenolic resin laminate molded product or a glass cloth-based epoxy resin laminate molded product.

These paper-based phenolic resin laminate molded products or glass cloth-based epoxy resin laminate molded products are produced by inserting a molding material between heating plates for heating and pressing and molding under high temperature and high pressure. ing.

In FIG. 1, 1 is a hot plate for heating and pressurizing, 2 is a presser plate, 3 is a paper or rubber cushion, 4 is a mirror plate, 5 is a molding material, and 6 is a feed plate for transfer. In this process, pressure is applied through paper, asbestos, or a flat rubber plate as a cushion in order to equalize the pressure and control the temperature rise.

These cushions become fatigued by repeated pressurization and heating, and cannot be used for a long period of time. The present invention has been made in view of the above points, and in a method for forming a laminate product in which a molding material is heated and pressed by a hot plate for heating and pressing through an end plate and a cushioning material. It is characterized by the use of a plate-like material that shows the characteristics of the material.

That is, it is characterized by interposing a plate-like material between the molding material and the heating plate for heating and pressing, which exhibits the necessary fluidity to make the molding pressure (200 to 20 to 9/(-771) uniform) during molding. As a plate-like material exhibiting such fluidity, an inorganic powder or granular material held in a deformable plate-like space, or a plate-like viscous polymer material is used.

These materials exhibit moderate fluidity at high temperatures and pressures,
It equalizes the pressing force and acts as a conductor of heat transmitted from the hot plate. Suitable inorganic materials include silica sand, clay, calcium carbonate, carbon, alumina, metal, etc., and it is also possible to partially mix glass fiber, asbestos, etc. The inorganic powder or granular material is used by holding the scattering prevention container 7 in a deformable plate-shaped space sealed with a sealing material 8, as shown in FIG.

9 is inorganic powder or granules.

FIG. 3 shows this state of use. In this case, it is also possible to adjust the amount of heat conductive metal powder or granules mixed in to adjust the heat transfer from the hot plate.

Alternatively, oil can be placed in a scatter-preventing container to provide appropriate fluidity.

As shown in FIG. 4, if the scattering prevention container is used integrally with the hot plate, work efficiency will be improved. In FIG. 4, numeral 10 indicates a heating medium passage. As the viscous polymer, one is selected that exhibits appropriate fluidity at the molding temperature. These can be experimentally found and used, such as polyethylene, polypropylene, nylon, polyester, etc., which are suitable for the molding temperature and pressure. Inorganic powder or granules are mixed into this polymer granular material, if necessary.

The above inorganic powder or granular material or viscous polymer material can be used alone or in combination.

As explained above, the effects achieved by using a plate-like material that exhibits fluidity during molding as a cushion material are as follows.

(1) Long lifespan.

The lifespan of paper-based cushions, which have been widely used in the past, is about one cycle, but there was no change even after using them more than 1,000 times.

(2) In the cushion according to the present invention, heat conduction can be adjusted by partially incorporating powder such as metal.

(3) Workability is improved by integrating with the hot plate.

(4) Cheaper than conventional cushions.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional molding method, Fig. 2 is a sectional view of the cushion material of the present invention, Fig. 3 is a sectional view showing the forming method of the present invention, and Fig. 4 is a sectional view of the cushion material heated. It is a sectional view showing a state where it is integrated with a plate.

Claims (1)

[Scope of Claims] 1. In a method for forming a laminate product in which a molding material is heated and pressed by a hot plate for heating and pressing through an end plate and a cushioning material, a plate-like material that exhibits fluidity during molding is used as the cushioning material. A method for forming laminate products characterized by the use of 2. The method for molding a laminate product according to claim 1, wherein the plate-like material exhibiting fluidity during molding is an inorganic granule or a granular material held in a deformable plate-like space. 3. The method for molding a laminate product according to claim 1, wherein the plate-like material exhibiting fluidity during molding is a plate-like viscous polymer material.