LOW-PRESSURE INJECTION MOLDING METHOD AND LOW-PRESSURE INJECTION MOLDER

摘要

PURPOSE: To mold a molded article by casting molten resin, which is fed from an injection unit through a flow path connecting device to a molding equipment, onto the molding surface of a lower mold by low pressure injection instead of high pressure parting injection and, at the same time, make the movement of the lower mold possible in order to unload a molded product. ;CONSTITUTION: During the lowering course of the upper mold 51 of a molding equipment B toward its lower mold 55, the molding material feeding section 42 of an injection unit A is moved forward to molding equipment B side. After that, the internal flow path 5 of a first joint nozzle 1 fitted to the molding material feeding section 42 and the internal flow path of a second joint nozzle 2 fitted to the lower mold 55 are connected in series with each other. By feeding molten resin from the delivery flow path of the molding material feeding section 42 through both the internal flow paths into the pouting flow path of the lower mold 55, the molten resin is injected on the molding surface 55a of the lower mold 55. A molded article is molded between the upper mold 51 and the lower mold 55 by lowering the upper mold 51 to the lowering end. Then, by moving the lower mold 55 together with the molded article, the article is released from below the upper mold 51.;COPYRIGHT: (C)1993,JPO&Japio