Apparatus for inhibiting checks and cracks in the moil or yoke a

Details Apparatus for inhibiting checks and cracks in the moil or yoke a Apparatus for inhibiting checks and cracks in the moil or yoke a

1976-08-05

1977-10-04

Bashore, S. Leon

Glass manufacturing

Press molding machine

With means for heating or cooling apparatus

65356, 65362, 65 68, C03B 1112, C03B 938, C03B 1106

Patent

active

040521893

ABSTRACT:
In the hot forming of TV funnels from molten glass, heat is extracted from the glass in the moil area at a lesser rate than that in adjacent areas by providing relatively thin mold portions in such area and thereby producing more fluid glass which may be formed with lower pressing forces. Further, by reducing the wall thickness of the nose portion of a pressing plunger, internal cooling may be applied to such nose portion during the pressing cycle to cool such nose portion and contract it away from the moil area, and thereby prevent the formation of checks and cracks during plunger withdrawal.

REFERENCES:
patent: 2853834 (1958-09-01), Vincent
patent: 3078696 (1963-02-01), Torok
patent: 3132018 (1964-05-01), Prendergast et al.
patent: 3148047 (1964-09-01), Torok
patent: 3282671 (1966-11-01), Lanker
patent: 3573025 (1971-03-01), Hamilton
patent: 3595637 (1971-07-01), Eldred et al.
patent: 3660067 (1972-05-01), Townsend, Jr. et al.
patent: 3997318 (1976-12-01), Takatoki et al.

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