Heat insulating mold, mold component, molding machine, and method for manufacturing the heat insulating mold

Abstract

This invention provides a heat insulating mold, a mold component, a molding machine and a method for manufacturing the heat insulating mold, which can realize shortened molding cycles and improved durability of heat insulating layer (25). The heat insulating mold comprises a mold plate and a transfer member mounted on the mold plate provided with a transfer face having a fine concavoconvex pattern on a face opposite to cavity spaces (C1, C2). The heat insulating layer (25) having a densified surface is formed on the mold plate in its face abutted against the transfer member. Since the heat insulating layer (25) is formed on the mold plate in its face abutted against the transfer member, the temperature of the molding material filled into the cavity spaces (C1, C2) is temporarily held by the heat insulating layer (25). As a result, the growth and development of the surface hardening layer is delayed, and the pattern transfer of the transfer face can be finished in the delayed period. Since the surface of the insulating layer (25) is densified, the surface of the heat insulating layer (25) can be smoothened to a very high level. Further, the durability of the heat insulating layer (25) can be improved.

Description

technical field [0001] The present invention relates to a heat-insulating mould, a mold part, a forming machine and a method of manufacturing a heat-insulating mould. Background technique [0002] Conventionally, in a molding machine such as an injection molding machine, resin melted in a heating cylinder is filled into a cavity space in a mold device, cooled and solidified in the cavity space, and molded into a molded product. [0003] The above-mentioned injection molding machine has a mold device, a mold clamping device, and an injection device. The injection device has a heating cylinder that heats and melts the resin, and is installed at the front end of the heating cylinder. An injection nozzle that injects the molten resin is free to rotate and can move forward and backward. Screws and the like arranged in the above-mentioned heating cylinder. In addition, the above-mentioned mold device has a fixed mold and a movable mold, and by using the above-mentioned mold clamp...

AI Technical Summary

Problems solved by technology

[0010] However, in the heat insulating mold of the above-mentioned prior art, the durability of the heat insulating layer is lowered due to the selected heat insulating material and the method of forming the heat insulating layer, etc.

[0011] For example, although it is conceivable to form a heat insulating layer made of a polymer material on the surface of the mold main body that is in contact with the mold insert, as molding is repeated, expansion and contraction caused by heating cycles make the surface of the heat insulating layer contact with the mold main body. Part of the face is rubbed and the insulation is worn away

[0012] Furthermore, in the heat insulating layer described in Patent Document 1, since gaps are formed, roughness corresponding to the gaps will appear on the surface even if it is polished.

As a result, as the temperature of the resin changes during the molding process, expansion or contraction of the stamper may occur, and scratches may be formed on the back of the stamper

Also, in order to prevent the formation of scratches, DLC coating can be considered, but if DLC coating is applied on a rough surface, the adhesion stability will be reduced

Images