Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1988-03-08
1990-01-02
Coven, Edward M.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
264221, 264317, 264278, 273 73C, 273 73D, A63B 5110
Patent
active
048911755
ABSTRACT:
The invention relates to a method of making a hollow frame for a games racket by injection moulding of fibre-reinforced thermoplastics material around a fusible core. The core is formed with holes through it corresponding to the desired stringing holes. The core holes are stepped so that the hole in one face of the core is larger than the hole in the opposite face. A stepped mould pin is inserted through each hole through the core, the pins being of such dimensions that the bore of the larger hole is completely filled giving positive location but the bore of the smaller hole is of greater diameter than that of its corresponding portion of the pin. Injection of the thermoplastics material, followed by setting of that material and then removal of the core results in a product having reinforcing tubular projections inwardly from one wall of the hollow frame.
REFERENCES:
patent: 881266 (1908-03-01), Thompson et al.
patent: 1937787 (1933-12-01), Robinson
patent: 2683899 (1954-07-01), Reichenbach
patent: 3556524 (1971-01-01), Carlton
patent: 3972974 (1976-08-01), Pico
patent: 4291574 (1981-09-01), Frolow
patent: 4297308 (1981-10-01), Popplewell
patent: 4343757 (1982-08-01), Popplewell
patent: 4440392 (1984-04-01), Popplewell
patent: 4614627 (1986-09-01), Curtis et al.
Coven Edward M.
Dunlop Limited
Stoll William E.
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