Patent ID: 7765832
Filing Date: 2010-08-03
Classification: C03B

Abstract:
1. A method of producing reflectors from glass or glass ceramics comprising the steps of: providing a mold comprising an upper mold part and a lower mold part defining a cavity in between and being movable relative to each other, said cavity having the shape of a reflector having a closed bottom and being open to the outside; placing a glass mass within said mold; molding a reflector at a temperature above the transformation temperature of the reflector by moving at least one of said upper and lower molds against the other one of said upper and lower molds; providing a holder comprising an opening; removing said reflector from said mold and placing said reflector within said opening of said holder; heating up said reflector in a region of its bottom; placing a die below said bottom of said reflector; lifting said bottom of said reflector by raising said die while supporting said bottom laterally on holding elements projecting from said die in an upward direction so that the reflector is not supported by the holder; providing a plunger being movable against said bottom toward said die; and thereafter punching at least one opening into said bottom by moving said plunger toward said die into a matching opening provided within said die.