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
1997-10-30
1999-02-23
Mackey, James P.
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
2642791, 2643281, 425116, 4251291, 425573, B29C 4514, B29C 4527
Patent
active
058740384
ABSTRACT:
An injection mold for golf balls includes a pair of separable mold segments (1a, 1b). The mold segments (1a, 1b) are mated at their peripheral surfaces (12) along a parting line so that their inner surfaces (2a) define a spherical cavity (2). A plurality of dimple-forming projections (11) are formed on the inner surfaces (2a). At least four tubular gates (7) are disposed in the peripheral surfaces (12) and in fluid communication with the cavity (2). The peripheral surfaces (12) are furrowed except for the areas where the gates are disposed. Dimple-forming pins (14) are received in furrows (13) so as to lie across the parting line (PL). A molten stock material is injected into the cavity (2) through the gates (7) to mold a golf ball having dimples lying across the parting line.
REFERENCES:
patent: 4653758 (1987-03-01), Solheim
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patent: 5122046 (1992-06-01), Lavallee
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patent: 5458473 (1995-10-01), Banji
Ihara Keisuke
Inoue Michio
Kasashima Atsuki
Masutani Yutaka
Shimosaka Hirotaka
Bridgestone Sports Co. Ltd.
Mackey James P.
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