METHOD FOR PRODUCING MOLDED ARTICLE OF THERMOPLASTIC RESIN EXPANDED BEADS

Abstract: a method for producing a molded article of thermoplastic resin expanded beads includes a cracking filling step and an in-mold molding step. expanded beads to be used in the cracking filling step each have a columnar shape and each have one or more defective portions of one or two kinds, the defective portions being selected from the group consisting of through holes and grooves. a molding cavity of a mold has a first portion having a length in an opening/closing direction of the mold greater than an average length land a second portion shorter than the average length l. in the cracking filling step, a difference p2−p1between a minimum value p1of the compression rate of the first portion and a maximum value p2of the compression rate of the second portion is 5% or more and 100% or less.

Inventor(s): Tomohiro MIURA, Kenta SASAKI

CPC Classification: B29C39/003 (Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor ( takes precedence))

Search for rejections for patent application number 20250162206