Method for manufacturing extrusion molding with smooth surface and extrusion molding apparatus
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United States of America Patent
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N/A
Issued Date -
Aug 19, 2004
app pub date -
Jan 12, 2004
filing date -
Jan 14, 2003
priority date (Note) -
Abandoned
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Abstract
A method for manufacturing an extrusion molding with a smooth surface. An apparatus having a die and a sizing equipment is supplied with a molding material of thermoplastic resin. A heat conducting member is disposed within a flow channel of the die, and its tapered distal end portion is penetrated into a shaping flow channel beyond an orifice of the die. The molding material in molten state is introduced through the orifice into the shaping flow channel, and a solidified extrusion molding having a predetermined cross-sectional shape is exhausted out of the sizing equipment. Heat is supplied from the heat conducting member to the molding material, so that a molten portion remains when the molding material passes the distal end portion. Surface of the molding material is pressed against an inner wall face of the shaping flow channel due to a pressing force of the molten portion.
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