Method of moulding racquets with stringing holes

Details Method of moulding racquets with stringing holes Method of moulding racquets with stringing holes

1987-09-15

1989-06-27

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

249142, 249176, 249184, 264277, 264313, 264334, B29C 3348, B29C 4514

Patent

active

048427985

ABSTRACT:
A method of moulding racquets to define stringing holes in the moulded frame. The method includes forming at least one approximately ladder-shaped member having two side pieces interconnected by rung pieces, with the side pieces substantially conforming to the curved shape of at least part of the frame of the racquet; entrapping the ladder-shaped member between two mould plates defining a mould cavity; injecting a plastic material into the mould cavity to mould the frame around the rung pieces; and forming the ladder-shaped member in two parts and separating the two parts after the frame has been moulded to remove the ladder-shaped member from the moulded frame.

REFERENCES:
patent: 2085324 (1937-06-01), Lindner
patent: 2343205 (1944-02-01), Pudelko
patent: 3318563 (1967-05-01), Downing
patent: 3892831 (1975-07-01), Robin et al.
patent: 4031181 (1977-06-01), Schaefer et al.
patent: 4180542 (1979-12-01), Wrasman
patent: 4183776 (1980-01-01), Staub et al.
patent: 4264389 (1981-04-01), Staub et al.
patent: 4297308 (1981-10-01), Popplewell
Plastics World, "Melt-Away Insert Trims Part Weight", May 1983.
Modern Plastics, "Modified RTM Cuts Cost of Advanced Composites", Mar. 1985.

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