Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1993-12-14
1995-06-13
Ball, Michael W.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264171, 2641772, 264250, 15624411, 15624423, 15624424, 4251311, 296 93, B29C 4706, B29B 1116
Patent
active
054240190
ABSTRACT:
A method for manufacturing a weather strip for motor vehicles, wherein the weather strip body is provided with a protective film having a low friction characteristic and an increased tightness on an abutment portion with which the glass pane of the vehicle door is brought into contact. An olefin polymer based resin or a foamed material thereof, is extruded from one extrusion molding machine into a mold, is so to form the weather strip body, while a mixture consisting of a base material of an olefin polymer based resin having low viscosity and high fluidity and grains of particles of an additive material of an olefin polymer based resin having a high viscosity and low fluidity is extruded from another molding machine into the mold, so as to form the protective film. The weather strip body and the protective film are co-extruded and polymerized in the mold, and a rough surface having a plurality of protrusions is formed by the grains or particles of the additive material on the surface of the protective film.
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Kato Katsuhisa
Miyakawa Naohisa
Ball Michael W.
Lorin Francis J.
System Technical Co., Ltd.
Tokiwa Chemical Industries & Co., Ltd.
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