Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1991-04-16
1992-05-19
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264157, 26417717, 2641772, 2642102, 26421113, 2642791, 264294, 2642975, 264325, 26433113, 26433117, 26433118, B29C 4700, B29C 4702
Patent
active
051146509
ABSTRACT:
A method of extruding a profiled strip of polymeric material off the extrusion die of a plastic extruder and immediately thereafter compression forming a predetermined section of the profiled strip into a predetermined shape when temperature of the polymeric material is sufficiently high to allow plastic flow in the profiled strip. The method including the steps of first extruding a profiled strip of polymeric material through the extrusion die and compression molding a predetermined section of the profiled strip into a predetermined shape at a close proximity from the extrusion die with a set of compression molding dies capable of traveling with the profiled strip at substantially the same speed for a sufficient length of time to permanently set the predetermined shape, disengaging the compression molding dies from the profiled strip at a predetermined distance from the extrusion die; cooling the profiled strip having the compression molded predetermined shape in a suitable cooling fluid such that the predetermined shape is permanently maintained, and then trimming the extruded profiled strip into discontinuous pieces each having the compression molded predetermined shape.
REFERENCES:
patent: 3320225 (1967-05-01), Bradbury
patent: 3387069 (1968-06-01), Stohr
patent: 3454693 (1969-07-01), Crenshaw
patent: 4081504 (1978-03-01), Wenrick et al.
patent: 4261940 (1981-04-01), Bussey, Jr.
patent: 4563320 (1986-01-01), Morgan
Franck Donald L.
Shah Suresh D.
Sheth Manu K.
Zabel Lawrence D.
General Motors Corporation
Tentoni Leo B.
Tung Randy W.
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