MOLDING CAP FOR THERMOPLASTIC RESIN SHEET AND METHOD FOR EXTRUSION MOLDING FOR THERMOPLASTIC RESIN SHEET

摘要

PROBLEM TO BE SOLVED: To provide a molding cap capable of manufacturing a thermoplastic resin sheet reduced in thickness irregularity of a specific cycle of 0.2-2 (1/m). SOLUTION: In the molding cap for the thermoplastic resin sheet, a molten thermoplastic resin is allowed to flow in a manifold expanded in the width direction of a molded sheet and discharged from the slit provided to the leading end of the cap while reducing resin thickness to manufacture the thermoplastic resin sheet. The inclined angleθformed by the flow direction of the resin flowing in the manifold and the discharge direction of the resin sheet from the cap is set to 5-75 deg..