Method for molding vitreous optical elements

Details Method for molding vitreous optical elements Method for molding vitreous optical elements

1997-09-02

1998-12-22

Silverman, Stanley S.

Glass manufacturing

Processes

With vibrating, oscillating or agitating a preform

65 56, 65 70, 65 97, 65105, 65112, 65177, 65183, C03B 3310

Patent

active

058512543

ABSTRACT:
A method for molding optical glass elements including the steps of injecting molten glass material into a mold cavity through an injection port, runner and gate; cooling molten glass material in the mold cavity to a solidified state; and applying vibrations to solidified glass material in the mold cavity through a gate-forming member inserted into the mold assembly to form a gate to make a gate cut by concentration of stresses at boundary regions between the gate and the mold cavity.

REFERENCES:
patent: 196326 (1877-10-01), Beck
patent: 205781 (1878-07-01), Atterbury
patent: 218010 (1879-07-01), Fox
patent: 1262567 (1918-04-01), Rippl
patent: 1482760 (1924-02-01), Milliken
patent: 3729302 (1973-04-01), Heaton
patent: 4585152 (1986-04-01), Sager
patent: 4952354 (1990-08-01), Yokoi et al.
patent: 5069832 (1991-12-01), Okumura et al.
patent: 5069833 (1991-12-01), Yokoi et al.

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