Resin container manufacturing method, die unit, and blow molding device

Abstract

A method for manufacturing a resin container includes: injection-molding a first layer of a bottomed cylindrical preform from a first resin material as a first injection-molding; accommodating the first layer manufactured in the first injection-molding in a temperature adjustment mold, adjusting a temperature of the first layer, and forming an opening portion in a bottom portion of the first layer; injecting a second resin material from the opening portion to an inner peripheral side of the first layer to laminate a second layer on the inner peripheral side of the first layer, as a second injection-molding; and blow-molding a multilayer preform obtained in the second injection-molding-step in a state where the multilayer preform includes residual heat from the injection molding to manufacture the resin container.

Dependencies are inferred from the claim text.