Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1991-04-09
1993-03-09
Woodard, Joye L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65137, 65319, 6537413, 6537415, C03B 1112
Patent
active
051923530
ABSTRACT:
There is disclosed a method for molding near net-shape glass articles. In general, the inventive method comprises two basic steps; (1) heating the receiving and opposing molding surfaces of a mold apparatus to different predetermined temperatures; and, (2) bringing the receiving and opposing molding surfaces of the mold into essential contact with each other and pressing a delivered molten glass charge for a time sufficient to remove enough heat from the charge such that the temperatures of the molding surfaces and the glass charge are all nearly at equilibrium below the glass charge's softening point. The press time and the differential mold heating combine to achieve symmetric heat removal, i.e. causing all temperatures to reach equilibrium at nearly the same time.
REFERENCES:
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patent: 4969440 (1990-11-01), Marechal
Babcock, C. L., Forming in the Glass Industry, Chapter 95, 1983, pp. 431-444.
Corning Incorporated
Janes Jr. Clinton S.
Schaeberle Timothy M.
Woodard Joye L.
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