Patent ID: 6442975
Filing Date: 2002-09-03
Classification: B24B,C03B,C03C

Abstract:
A method for manufacturing a thin plate-shape glass article utilizing a mold having a lower die forming face and a first and a second opposing molding surfaces, comprising the steps of:(a) preheating said lower die forming face and said first opposing molding surfaces to a predetermined preheat temperature; (b) delivering to said lower die forming face a charge of molten glass of a predetermined volume to form a glass article of desired shape and dimensions; (c) bringing said lower die forming face and said first opposing molding surfaces of said mold into close proximity with each other; (d) pressing said charge to transfer heat from said charge of molten glass to form an initial thin plate-shape glass article; (e) bringing said lower. die forming face and said first opposing molding surfaces of said mold apart with each other when the inside of said initial thin plate-shape glass article maintains a temperature higher than a glass transition point temperature; (f) bringing said lower die forming face and either said first opposing or said second opposing surfaces of said mold into close proximity with each other; (g) pressing said initial thin plate-shape glass article to transfer heat from said initial thin plate-shape glass article for warp modification of said initial thin plate-shape glass article; (h) bringing said lower die forming face and either said first opposing or said second opposing surfaces of said mold apart with each other when the inside of said initial thin plate-shape glass article maintains a temperature higher than said glass transition point temperature; and (i) removing said thin plate-shape glass article from said lower die forming face.