MOLDING OF FOAMABLE SYNTHETIC RESIN AND FOAM MOLDING MACHINE

• Main Author: NAGATSUKA MASAHIRO
• Format: Patent
• Language: English
• Published: 19.11.1996
• Edition: 6
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE: To leave a molded product in either one of fixed and movable molds without using compressed air when the molded product is taken out of a mold after vacuum cooling to reduce the consumption quantity of compressor air. CONSTITUTION: When the steam chambers 1a, 2a of a fixed mold 1 and a movable mold 2 are in a vacuum state at a point of time when the vacuum cooling of a foamed molded product molded by foam fusion is completed, the atmosphere is introduced into the steam chamber 2a of either one of the molds 1, 2 through steam piping 32 to generate pressure difference between the fixed and movable molds 1, 2 (the pressure on the side of the movable mold > the pressure on the side of the fixed mold) and a molded product S is released from the movable mold 2 on the basis of the pressure difference to be left on the side of the fixed mold 1. Air valves 31a, 32a are provided to the steam pipings 31, 32 of the steam chambers of the respective molds to simply introudce the atmophsere into the steam chambers 1a, 2a.