METHOD OF AND SYSTEM FOR PRESSING SHEET GLASS

摘要

A glass sheet is heated nearly to its softening point while being passed through a heating furnace. The heated glass sheet is then clamped at its peripheral edge between first and second molds. Thereafter, a third mold is pressed against a central region of the glass sheet with the peripheral edge thereof clamped, thereby to project the central region from one side to the other side thereof. The glass sheet is thus pressed to a desired highly curved shape with no wrinkles or cracks developed therein. The glass sheet is clamped and pressed by a pressing apparatus which includes a fixed concave ring mold as the first mold, and a movable convex mold comprising a peripheral mold assembly as the second mold and a central mold member as the third mold. The glass sheet thus curved is typically used as a front or rear window glass sheet for automobiles.