Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1991-01-24
1993-01-05
Heitbrink, Tim
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264258, 264314, B29C 3312
Patent
active
051768682
ABSTRACT:
A long fiber, thermoplastic frame for a tennis racquet or other implement is formed of fibers of carbon or other reinforcement material, which are oriented at desired angles, and which are intimately embedded in thermoplastic resin. A frame according to the invention is made by co-winding or commingling tows of carbon or other reinforcing fibers with filaments of thermoplastic material, or by preimpregnating fibers with a thermoplastic powder. The fibers, which are preferable formed into a braided sleeve for ease of handling, are disposed in a heated mold, and internally pressurized to conform to the mold and such that the thermoplastic melts and flows into intimate contact with the fiber material. A frame according to the invention possesses the strength and stiffness of a long fiber, thermoset frame, but unlike a thermoset frame has dynamic stiffness due to the visco-elastic properties of the thermoplastic resin.
REFERENCES:
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patent: 4360202 (1982-11-01), Lo
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patent: 4539249 (1985-09-01), Curzio
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patent: 4871491 (1989-10-01), McMahon
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patent: 5047263 (1991-09-01), Glemet
Heitbrink Tim
Prince Manufacturing, Inc.
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