Patent ID: 6595026
Filing Date: 2003-07-22
Classification: C03B,Y02P

Abstract:
A method of producing final glass products, comprising:a glass mass forming step of forming glass masses fed through a nozzle by receiving a molten glass in a plurality of molding dies and gradually cooling said molten glass masses; a preliminary polishing step of preliminarily polishing the glass masses formed by the glass mass forming step by the use of a barrel polishing technique said preliminary polishing step increasing a roughness of the surfaces of said glass masses; a pressing step of reheating the preliminarily polished glass masses in an air atmosphere to a temperature corresponding to a viscosity of 104-106 poises and press-molding said glass masses in an air atmosphere by a mold to produce press-molded products having a configuration approximate to the final glass products; and a polishing step of polishing said press-molded products to form final glass products; wherein said pressing step is performed by applying a powdery parting agent on each surface of the glass mass and by reheating and press-molding said glass mass that has a surface roughness increased by the preliminary polishing step.