EXTRUSION MOLDING MACHINE, AND METHOD FOR MANUFACTURING MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To shorten the adjusting time of uneven wall thickness by simply adjusting the uneven wall thickness produced in a tubular molded product.

SOLUTION: This extrusion molding machine is constituted so as to mold the tubular molded product P by extruding a molding material from the gap between an inner mold and an outer mold and equipped with a displacement means for displacing the outer mold around the inner mold, an uneven wall thickness detector 30 for detecting the uneven wall thickness of the molded product P and the uneven wall thickness adjusting means. The uneven wall thickness detector 30 has a holding member 32 for holding the outer peripheral surface of the end part of the molded product P, a probe 33 arranged in the end part of the molded product P and an inner peripheral surface detection means 40 for detecting the position of the inner peripheral surface of the molded product P by the probe 33. The uneven wall thickness detector 30 calculates the thickness of the molded product P on the basis of the detection position of the inner peripheral surface of the molded product P and determines the uneven wall thickness of the molded product P on the basis of the calculated thickness. The uneven wall thickness adjusting means is constituted so as to displace the outer mold by the displacement means on the basis of the detection result of the uneven wall thickness detector 30 to adjust the uneven wall thickness of the molded product P.

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