Mold assembly and methods for producing molded glass

Details Mold assembly and methods for producing molded glass Mold assembly and methods for producing molded glass

1989-07-11

1991-05-07

Woodard, Joye L.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65275, 65286, 6537413, 6537415, C03B 2300

Patent

active

050133489

ABSTRACT:
A mold assembly adapted for producing a molded glass in a relatively thin form has an upper mold and a lower mold. The lower mold carries thereon a glass to be molded during the heating, pressing and cooling of the glass to be molded. The lower mold has the maximal thickness below or equal to 1/10 of a diameter of the lower mold. A third ring-shaped mold having an annular recess along its interior surface receives the molded glass during pressing between the upper and lower molds to prevent sticking of the molded glass product to a mold surface when released from the mold assembly after pressing. Additionally, a stopper is used to contact the periphery of the ring-shaped mold to strip the molded glass product from the upper mold when the latter is moved upwardly during pressing the molded glass.

REFERENCES:
patent: 3244497 (1966-04-01), Copeland
patent: 4696692 (1987-09-01), Schmitt
patent: 4756737 (1988-07-01), Yoshimura et al.
patent: 4778505 (1988-10-01), Hirota et al.
patent: 4836838 (1989-06-01), Hirota et al.

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