| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an extrusion-molded product superior in appearance with good productivity. SOLUTION: In the method for manufacturing the extrusion-molded product by heating and kneading a composite resin material, which is obtained by compounding a reinforcing material or a filler with a thermoplastic resin, in the cylinder of an extruder to prepare a molten composite resin and passing the molten composite resin through a cooling die to solidify and mold the same, the cooling die is equipped with a first cooling part (A) having a plurality of flow channels and a second cooling part (B) having a flow channel where the composite resins passed through a plurality of the flow channels meet with each other. The cooling temperatures of the first and second cooling parts (A) and (B) are set so that the temperatures of the composite resins during the passage through the flow channels are set low toward the vicinity of the cooling die from the central part of the composite resin. The inflow port to the flow channel of the first cooling part (A) is preferably made narrow gradually in an extrusional direction. COPYRIGHT: (C)2008,JPO&INPIT
|
