Patent ID: 6079228
Filing Date: 2000-06-27
Classification: C03B

Abstract:
A molding method of a glass element comprising:heating a glass material;press-molding the glass material between an upper mold and a lower mold when a temperature of the heated glass material reaches a predetermined temperature to form said glass element, at least said upper mold having a patterned surface for forming a patterned surface on said glass element;cooling the glass element while in contact with the upper and lower molds until a temperature of said glass element is within a range of .+-.20.degree. C. of a glass transition point of the glass material while gradually reducing a pressure applied to said glass element by said upper and lower molds at a rate of 3 to 30 kg/cm.sup.2 /minute until said pressure becomes 0 kg/cm.sup.2 ; andsubsequently cooling said glass element with said upper mold separated from said patterned surface on said glass element by a distance which is not less than the depth of the pattern.