Molding die apparatus for resin molded products, molding apparatus, molding system, and manufacturing method for molded products

Abstract

To provide a foaming agent used to manufacture a foaming resin, an apparatus, a molding die, a molding apparatus, a means for increasing a foaming ratio, and a means for increasing the suitability of coating in a manufacturing method for obtaining molded products having a foam layer therein. Molded products having a good appearance are obtained when carrying out manufacturing using a resin exhibiting compatibility with items in which a carrier resin is to be mixed, said carrier resin to be used to manufacture a foaming resin master batch. When inorganic baking soda is used in a foaming agent, sodium carbonate in a foam residue, which remains in molded products after an effervescent gas is generated due to decomposition of the foaming agent, reduces adhesion of a coating film. Thus, when acid washing is conducted in advance to remove the sodium carbonate, a suitable coating is satisfied. When performing GCP, the thickness of a surface skin layer is altered by the molding die surface temperature. Although a means in which heated steam is used for increasing the temperature of molding dies is common, in the present invention, a means for heating a magnetic fluid (liquid) by high-frequency induction is used, thereby inexpensively providing high heating efficiency and a stable increase in the temperature of a molding die. When performing composite molding and back molding of a means for obtaining molded products having a high foaming ratio, the molding products separate from the immobilization side. The present invention provides a means for solving this separation problem by using a gas.

Description

technical field [0001] The present invention relates to a foaming agent used to obtain a foamed molded (shaped) product, a method of manufacturing a foamed molded product, a method of coating a foamed molded product, a method of manufacturing a foamed molded product made of these materials, and a process for manufacturing the foamed molded product. device. Background technique [0002] Patent Document 1 describes a foam molding method in which a molding material composed of a resin (plastic) and a foaming agent is shortshot to leave an unfilled portion in a mold in which an insert is placed, and the foaming The expansion force generated by the foaming of the agent fills the unfilled part. The resin is composed of a base material resin and a low-molecular-weight resin that is the same type as the base material resin and has a lower molecular weight than the base material resin. [0003] Patent Document 2 describes the gas counter pressure (abbreviation: GCP) method, which i...

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Problems solved by technology

[0004] In Document 3, there is a description about pretreatment of bumpers of vehicle parts, but in foam molding, the surface of the foam molded product is cleaned by using sodium bicarbonate or a foaming agent containing sodium bicarbonate. In the method, there is no description of limited articles (articles, molded articles, etc.) using GCP

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