Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1997-10-01
1998-12-22
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
26417719, 26421111, 26421113, 264237, B29C 4788, B29C 4790
Patent
active
058514694
ABSTRACT:
The invention relates to a method for making a dimensionally stable wood-thermoplastic composite material composed of a wood component and a thermoplastic component comprising the steps of forming a wood-thermoplastic mass at a temperature above the melting temperature of the thermoplastic component. The mass is then passed through a converging die to form a shaped extrudate profile having a cross sectional shape wherein at least a part of the converging die is maintained at a substantially higher temperature than that of the mass. The profile is then fed through a low friction thermally insulating land section, the land section having the substantially the same cross sectional shape as the exit end of the converging die. The profile is then quenched in a non-oxidizing environment to form a substantially dimensionally stable outer shell around the profile, the shell having a temperature below the melting temperature of the thermoplastic component. The invention also relates to a die assembly for making a wood-thermoplastic composite material.
REFERENCES:
patent: 2833633 (1958-05-01), Hecht
patent: 3888810 (1975-06-01), Shinomura
patent: 4056591 (1977-11-01), Goettler et al.
patent: 4225640 (1980-09-01), Erb
patent: 4228116 (1980-10-01), Colombo et al.
patent: 4505869 (1985-03-01), Nishibori
patent: 4791020 (1988-12-01), Kokta
patent: 4968463 (1990-11-01), Levasseur
patent: 5082605 (1992-01-01), Brooks et al.
patent: 5088910 (1992-02-01), Goforth et al.
patent: 5217655 (1993-06-01), Schmidt
patent: 5759680 (1998-06-01), Brooks et al.
Decision of the Court of Appeals for the Federal Circuit, 1996 U.S. App. Lexis 14274.
Decision of the Court of Appeals for the Federal Circuit, 93 F.3d 1203 (Jun. 13, 1996).
Muller John J.
Wittenberg Roger A.
Tentoni Leo B.
Trex Company, L.L.C.
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