Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to heat the... – Induction heating
Patent
1997-03-10
1998-11-17
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to heat the...
Induction heating
264486, 26432816, 4251748R, 425547, 425552, H05B 610, B29C 3302
Patent
active
058371834
ABSTRACT:
A golf ball molding apparatus includes a mold comprising a pair of upper and lower mold halves (1 and 2) adapted to be mated to define a spherical cavity therebetween, each mold half being formed of a non-magnetic material and having a thin film layer (4) of a magnetic material applied to a cavity-defining surface thereof. An induction heating coil (5) is embedded in each mold half adjacent to the thin film layer. A cooling channel (6) is extended in the mold half for passing coolant water therethrough. A high-frequency oscillator (11) is coupled to the coil (5) for generating a magnetic field having magnetic lines of force across the thin film layer whereby the thin film layer generates eddy current to heat the cavity-defining surface. Molten stock material is then injected into the cavity. Coolant water is passed through a bore of the coil and the channel for cooling the mold and the coil whereby the stock material solidifies.
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Ihara Keisuke
Inoue Michio
Bridgestone Sports Co. Ltd.
Heitbrink Jill L.
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