Method of producing a bow holding handle

Details Method of producing a bow holding handle Method of producing a bow holding handle

1988-11-01

1989-06-06

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 464, 264278, B29C 6722

Patent

active

048369640

ABSTRACT:
A method of producing a bow holding handle by providing a first mold cavity in the same shape as said bow holding handle but in smaller size; placing required parts of said bow holding handle in corresponding positions of said first mold cavity; sealing said first mold cavity; injecting liquid foam plastic into said first mold cavity; activating said plastic foam to cause expansion thereof and form a core of said bow holding handle as the same shape of said first mold cavity; removing said core away from said first mold cavity; wrapping said core with a plurality of layers of fiber reinforced plastics; providing a second mold cavity shaped in the form of said bow holding handle; inserting said wrapped core into said second mold cavity; sealing said second mold cavity; heating said second mold to cure said layers of fiber reinforced plastic and to cause re-expansion of said core for generating pressure within said second mold cavity pressing said core against said layers of fiber reinforced plastic and thereby provide intimate bonding of said core and said layers; and removing said wrapped core away from said second mold cavity as an integral fiber reinforced plastic bow holding handle.

REFERENCES:
patent: 3339609 (1967-09-01), Cushman
patent: 3478134 (1969-11-01), Gruss et al.
patent: 4061520 (1977-12-01), Cecka et al.

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