Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1992-05-20
1993-01-05
Eley, Timothy V.
Metal working
Method of mechanical manufacture
Assembling or joining
29428, 156156, 156191, 273 73F, 273 73H, B23P 1904, B65C 326, A63B 4900
Patent
active
051759195
ABSTRACT:
A method for manufacturing a racket frame includes the steps of making a metal part having at least one joint end formed with a groove; covering the joint end of the metal part with a layer containing glass fibers to serve as an electrical insulating layer; making a preformed plastic part by wrapping a resin saturated carbon fiber material around a tube unit and by providing at least one end portion in the tube unit which has a wrapping layer thinner than that of the remaining portion of the tube unit to serve as a joint end; folding the end portion of the tube unit to seal the tube unit; inserting the folded end portion of the tube unit into the groove; wrapping and fastening the joint end of the metal part and the plastic part adjacent to the joint end of the tube unit with a resin saturated carbon fiber layer; forming and heating the metal part and the preformed plastic part in a mold; and supplying a compressed air into the tube unit to create a predetermined pressurizing force during the forming and heating step.
REFERENCES:
patent: 1630683 (1927-05-01), Williamson
patent: 3724850 (1973-04-01), Stevens
patent: 4264389 (1981-04-01), Staus et al.
patent: 4906002 (1990-03-01), Goffrey et al.
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