Machine for molding optical element

Details Machine for molding optical element Machine for molding optical element

1991-10-24

1993-02-23

Lindsay, Robert L.

Glass manufacturing

Press molding machine

With means for heating or cooling apparatus

65 64, 65 321, 65286, 65162, C03B 1108

Patent

active

051886529

ABSTRACT:
A machine is provided for molding an optical element by using a molding block having upper and lower molding dies, a sleeve die and a glass blank combined integrally with each other. The machine includes a chamber which accommodates a heating zone having a plurality of sections for heating the molding block from above and below, a deformation zone for pressing the molding dies and a cooling zone having a plurality of sections for cooling the molding block. The chamber is formed with an inlet and an outlet for the molding block. The sections of the heating zone, the deformation zone and the sections of the cooling zone are provided independently of one another. A transport member is provided for sequentially transporting the molding block through the heating zone, the deformation zone and the cooling zone, and first and second shutters are provided for opening gas supply member is provided for introducing nonoxidizing gas into the chamber.

REFERENCES:
patent: 4836838 (1989-06-01), Hirota et al.
patent: 4913718 (1990-04-01), Yoshimura et al.
patent: 4915720 (1990-04-01), Hirota et al.

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