Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1975-06-09
1977-02-22
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 467, 264 48, 264145, 264163, 264167, 264210R, 264321, B29D 2700, B29F 3012
Patent
active
040092372
ABSTRACT:
A shaped synthetic resin article varying in cross-sectional area and shape of longitudinal section along at least a part of the length is continuously produced by introducing a molten synthetic resin composition, extruded from an extruder die, between at least one pair of rolls rotating in the direction of extrusion so that the rolls of each pair contact each other on their periphery, the peripheral surfaces of the rolls being engraved so as to form a cavity corresponding to the shape of said shaped article when the rolls of each pair contact each other while being rotated, in which cavity the molten resin composition is remolded into an article having the desired shape and at the same time the surplus resin composition overflowing from said cavity is cut off by the edges of said rolls contacting each other, and then cooling the molded article to solidify the same. According to the above process, the diameter of the minimum cross-section of the article can be made much smaller than the outer diameter of the die or nozzle.
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patent: 3538209 (1970-11-01), Hegler
Hanada Minoru
Kawashima Giichi
Kimura Takashi
Nagami Minoru
Flock Karl W.
Sumitomo Bakelite Company Limited
Thurlow Jeffery R.
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