Molding device for molding optical elements

Details Molding device for molding optical elements Molding device for molding optical elements

1989-12-11

1991-11-05

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Radiated energy

264 25, 4251744, 4251748R, 4251748E, B29C 4573

Patent

active

050627864

ABSTRACT:
A molding device a molding machine with both fixed and movable side molds and which has cavities for molding a product. An injection cylinder injects resin into the cavities and a mold driving control performs the opening and closing operations of the molds. During the molding cycle, the cavities are heated by a high frequency heating system consisting of a coil, oscillation control section for inducing high frequency oscillation to the coil during the opening of the mold and stopping the high frequency oscillation during the closing of the molds. A mold temperature detector having a temperature sensor measures the temperatures of the molds and a temperature control initiates the circulating of a cooling medium within a circulating pathway which is provided within the molds.

REFERENCES:
patent: 4340551 (1982-07-01), Wada et al.
patent: 4771153 (1988-09-01), Fukushima et al.

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