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
1998-03-17
2000-03-07
Silbaugh, Jan H.
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
264274, 264275, 264278, 2642791, 425125, 4251291, 473367, 473368, 473370, B29C 4516
Patent
active
060336110
ABSTRACT:
In preparing a golf ball comprising an inner cover (8) and an outer cover (13) around a core (5), an injection mold is used for the injection molding of the inner cover. The mold has a molding surface defining a cavity (4) and a plurality of opposed support pins (6) adapted to be moved into and out of the cavity with respect to the molding surface. The inner cover is formed by supporting the core in the cavity by means of the support pins, leaving a space between the core and the molding surface, injecting a molding material into the space, and curing the injected molding material while support pins are being projected into the cavity and/or support pins have been withdrawn behind the molding surface, thereby forming around the core the inner cover (8) having recesses (12) and/or protrusions (14).
REFERENCES:
patent: 2376085 (1945-05-01), Radford et al.
patent: 4203941 (1980-05-01), Brooker
patent: 4660830 (1987-04-01), Tomar
patent: 4959000 (1990-09-01), Giza
patent: 5882567 (1999-03-01), Cavallaro et al.
Bridgestone Sports Co. Ltd.
Lee Edmund H.
Silbaugh Jan H.
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