Injection molding machine and injection molding method

• Main Author: TOKUNOU RYUICHI
• Format: Patent
• Language: Chinese; English
• Published: 24.10.2012
• 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

The invention relates to an injection molding machine and an injection molding method. An injection molding machine(10) includes a gas feeding mechanism (70)configured to feed gas to a cavity (C1)formed between a first mold plate(32) and a second mold plate (44)in a clamped state, an injection apparatus(50) configured to inject a foamable resin into the cavity (C1)having an inside pressure thereof increased to be higher than an atmospheric pressure by the gas feeding mechanism(70),and a gas releasing mechanism (80)configured to release the gas inside the cavity(C1) to an atmosphere through a gap formed between an inner wall surface(47a) of a through hole(47) formed through one of the first mold plate and the second mold plate(44) and an outer circumferential surface(61a) of a mold member inserted into the through hole(47), during or after the injection of the foamable resin by the injection apparatus.