Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1994-03-31
1997-01-07
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264 406, 264 407, 264142, 264148, 264DIG65, 264DIG69, B29B 1110, B29C 4792
Patent
active
055913849
ABSTRACT:
A method is disclosed for molding parts. The system comprises a plasticator and press. The plasticator is capable of receiving a plurality of molding materials comprising a predetermined amount of at least thermoplastic polymers and long reinforcing fibers, such as glass fiber. The plasticator is characterized in that it is capable of simultaneously receiving contaminated molding materials and relatively long glass fibers and molding them into a billet wherein the fibers remain substantially undamaged. The billet is subsequently placed in a compression molding press where other materials may be molded or applied to its surface. The method is further characterized in that a single thermal rise is used to plasticate the molding materials. The system employed by the method comprises a plasticator having a screw, a screw drive system, a plurality of heaters and control system to control the pressure and temperature in a barrel of the plasticator so as to create a billet having certain predetermined billet characteristics (such as a desired volume and/or density).
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Advertisement: RPM "Tomorrow's Thermoset Molding Today" for RPM-60 Reciprocating Screw Preplasticator for Thermosets. no month, year.
International Search Report dated Feb. 14, 1996 PCT/US95/03166.
Abrams Fredric L.
Freund Robert F.
Modern Technologies Corp.
Thurlow Jeffery R.
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