METHOD AND MACHINE FOR PRE-PROCESSING OF MODLING MATERIAL, INJECTION MOLDING MACHINE, AND INJECTION MOLDING METHOD

摘要

Provided are a pre-processing method and a pre-processing device for a molding material, an injection molding device, and an injection molding method controlling oxidization of the molding material by increasing content of an inactive gas in the molding material. The pre-processing method comprises the following steps: drying a molding material by heating; and reducing the temperature of the molding material in a container (40) filled with an inactive gas. The temperature of the molding material is reduced, while almost uniform pressure in the container (40) is maintained. And, in the container (40), the temperature of the molding material is gradually reduced compared with natural cooling. And then, the molding material at the reduced temperature is supplied to a molding device (2). Accordingly, the content of the inactive gas in the molding material can be increased. Therefore, oxidization of the molding material during molding can be controlled.