Method of producing press-molded products
AssigneeHoya Corporation
InventorShogo Tsukada
Life of this patent
Estimating the term…
Abstract
A molten glass (8) is successively supplied from a nozzle (5) to a plurality of molding dies (7) and gradually cooled to form glass masses. Each glass mass is reheated in an air atmosphere to a temperature corresponding to a viscosity of 104-106 poises and press-molded by a mold to produce a press-molded product. The press-molded product is polished to form a final glass product.
Claims12
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.
A method of producing final glass products, comprising:
- a glass mass forming step of forming glass masses fed through a nozzle by receiving molten glass in a plurality of molding dies and gradually cooling said molten glass;
- a preliminary polishing step of preliminarily polishing each of the glass masses formed by the glass mass forming step so that each surface of the glass masses is roughened;
- 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 after applying a powdery parting agent on each surface of the glass masses and press-molding the glass masses in an air atmosphere with the powdery parting agent applied 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.
A method of producing press-molded products which are to be finished into final glass products by final polishing and which are manufactured from glass masses, the press-molded products therefore having shapes different from the final glass products and therefore needing the final polishing, said method comprising the steps of:
- a glass mass forming step of successively and individually receiving a predetermined weight of molten glass on each of a plurality of molding die to successively form a glass mass;
- a preliminary polishing step of preliminarily polishing the glass masses formed by the glass mass forming step at a time by the use of a barrel polishing technique to roughen each surface of the glass masses;
- distributing the preliminarily polished glass masses to molds in an air atmosphere;
- applying a powdery parting agent on the surfaces of each preliminarily polished glass masses, and
- successively press-molding the preliminarily polished glass masses in an air atmosphere reheated to a temperature corresponding to a viscosity between 104 and 106 poises to thereby obtain the press-molded products approximate to the final glass products.
A method of producing press-molded products which are to be finished into final glass products by final polishing and which are manufactured from glass masses, the press-molded products therefore having shapes different from the final glass products and therefore needing the final polishing, said method comprising the steps of:
- a glass mass forming step of successively forming glass masses by receiving molten glass in a plurality of molding dies and gradually cooling said molten glass;
- a preliminary polishing step of preliminarily polishing each of the glass masses formed by the glass mass forming step so that each surface of the glass masses is roughened;
- and
- 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 after applying a powdery parting agent on each surface of the glass masses and press-molding the glass masses in an air atmosphere with the powdery parting agent applied by a mold to produce the press-molded products having a configuration approximate to the final glass products.
A method of producing final glass products finished by final polishing, comprising:
- a glass mass forming step of forming glass masses fed through a nozzle by successively receiving a molten glass in a plurality of molding dies and gradually cooling said molten glass;
- a preliminary polishing step of preliminarily polishing the glass masses formed by the glass mass forming step at a time by the use of a barrel polishing technique to roughen at least a surface of the glass masses;
- and
- a reheating step of reheating the preliminarily polished glass masses in an air atmosphere to a temperature corresponding to a viscosity of 104-106 poises;
- and
- a press-molding step of press-molding the preliminarily polished glass masses in an air atmosphere by a mold, with a powdery parting agent applied on each surface of the preliminarily polished glass masses, to produce press-molded products approximate in configuration to the final glass products.
A method of producing final glass products finished by final polishing, comprising:
- a glass mass forming step of forming glass masses fed through a nozzle by receiving molten glass in a plurality of molding dies and gradually cooling said molten glass;
- a preliminary polishing step of preliminarily polishing each of the glass masses formed by the glass mass forming step so that each surface of the glass masses is roughened;
- and
- 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 after applying a powdery parting agent on each surface of the glass masses and press-molding the glass masses in an air atmosphere with the powdery parting agent applied by a mold to produce press-molded products having a configuration approximate to the final glass products.
Dependencies are inferred from the claim text.