Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1994-08-29
1999-01-26
Weisberger, Richard
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264165, 26417126, 2641761, 2642091, 2647102, B29C 4792
Patent
active
058634800
ABSTRACT:
There is disclosed a process and apparatus for the continuous production of a thermoplastic product having biaxially oriented components. Preferably the thermoplastic compound includes filler. The process may be used to manufacture hollow profiles or sheets. The product is made by a continuous extrusion process which biaxially orients the components by forcing a molten thermoplastic compound through a contoured die with a contoured mandrel therein and then cooling the compound to preserve the imparted orientation. With respect to the sheets a biaxially oriented hollow profile is formed, then cut along the axial direction and then flattened into a sheet.
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Hill Nancy E.
Schumacher Lynn C.
SRP Industries Ltd.
Weisberger Richard
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