Glass forming apparatus

Details Glass forming apparatus Glass forming apparatus

1994-11-04

1996-07-30

Czaja, Donald E.

Glass manufacturing

Glassworking or preform by or with reheating means

Mechanical means to reshape preform

65103, 65122, 65183, 65355, 65356, C03B 2304

Patent

active

055407463

ABSTRACT:
A glass rod used as a molding material is inserted into a cylinder, pressed and heated with a temperature gradient in which the tip side of the glass rod is at a higher temperature. The glass rod is melted on the tip side thereof, and it is solidified on the rear side in the vicinity of the inlet of the cylinder, the solid portion functioning as a plunger when the rear side is pushed. When the glass rod is forwardly moved, the molten glass on the tip side is injected from an injection nozzle and is filled in the cavity of a forming mold. Since the glass rod itself is made of a molding material and functions as a plunger, when the tip side is melted and consumed, the solid portion on the rear side is forwardly moved and melted. It is thus possible to perform continuous mold forming without complicating the mechanism and steps and to improve the quality of the molded product.

REFERENCES:
patent: 2495956 (1950-01-01), Cook
patent: 3467513 (1969-09-01), Dockerty
patent: 4046540 (1977-09-01), Lewis et al.
patent: 4199343 (1980-04-01), Eolin et al.
patent: 4451116 (1984-05-01), Pinnow et al.
patent: 4695240 (1987-09-01), Li et al.
patent: 4728351 (1988-03-01), Meerman

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