| 摘要 |
PROBLEM TO BE SOLVED: To provide injection foamed moldings of thermoplastic resin with properties such as high magnification, low heat conductivity and low heat resistance as well as a manufacturing method for the injection foamed moldings. SOLUTION: The manufacturing method for the injection foamed moldings of thermoplastic resin comprises the steps to supply an insufficient amount of a foamable thermoplastic resin composition for filling a cavity (3), with properties such as the heat conductivity of 0.07 W/mK or less and the heat resistance of 0.2 m2K/W or more, into the cavity (3) of an injection molding die (2), keep the cavity (3) in the described state and cool the resin composition while partially expanding it and scale up the cavity (3) to a final cavity scale-up width after cooling and achieve a complete expansion of the resin composition. |
