EXTRUSION MOLDING METHOD

摘要

PURPOSE:To provide an extrusion molding method capable of rapidly and accurately controlling the temp. distribution in the vicinity of the extrusion port of an extrusion mold to control the thickness of an extrusion molded product with high accuracy. CONSTITUTION:In an extrusion molding method detecting the wall thickness distribution of a molded product and controlling the temp. distribution of an extrusion mold 1 on the basis of the detection result to control the wall thickness distribution of the molded product constant, a plurality of heating means 7 and a plurality of cooling means 8 are provided to the extrusion mold 1 constituted of a cylindrical outer diameter die 10 and an inner diameter die and individually controlled.