Method for breaking out a sheet of glass

Abstract

The method includes tracing a score line on the surface of the glass, using a scoring tool, and breaking out using a local pressure system applied on the opposite face and opposite the score line, the local pressure system being moved and pressed along the score line on the opposite face.

1 . A method for breaking out a complex shape from a sheet of glass, comprising:
 tracing a score line on a surface of the glass, using a scoring tool, and   breaking out the glass using a local pressure means applied on an opposite face and opposite the score line, the local pressure means being moved and pressed along the score line on said opposite face.   
     
     
         2 . The method as claimed in  claim 1 , further comprising planar-support means on the side of the score line, facing the local pressure means during the breaking-out. 
     
     
         3 . The method as claimed in  claim 2 , wherein a suction table is utilized as the planar-support means, the suction table supporting the sheet of glass by suction on a top face of the sheet of glass during the breaking-out or scoring. 
     
     
         4 . The method as claimed in  claim 1 , wherein the tracing and the breaking-out are performed without turning the sheet of glass over. 
     
     
         5 . The method as claimed in  claim 1 , wherein the local pressure means is mounted so that the local pressure means is rollable so as to roll along the sheet of glass. 
     
     
         6 . The method as claimed in  claim 1 , wherein the local pressure means is a ball or a roller. 
     
     
         7 . The method as claimed  claim 1 , wherein the local pressure means is applied with a pressing force that is chosen according to a local radius of curvature of the shape that is to be cut out. 
     
     
         8 . The method as claimed in  claim 1 , wherein the local pressure means is pressed continuously along the score line. 
     
     
         9 . The method as claimed in  claim 1 , wherein the local pressure means is pressed with a force that has at least one periodic component. 
     
     
         10 . The method as claimed in  claim 1 , wherein the method is used to cut at least two imbricated and/or tangential complex shapes from the same sheet of glass. 
     
     
         11 . A method for manufacturing a plurality of glazings of complex shape from a large-sized rectangular sheet of float glass having at least one dimension corresponding to a width of a ribbon of float glass from which it large-sized rectangular sheet of float glass is produced, the method comprising performing the method as claimed in  claim 1  to cut out at least part of said glazings. 
     
     
         12 . The method as claimed in  claim 11 , comprising:
 on a first workstation for scoring said sheet of glass, tracing at least one score line corresponding to at least one ready to shape edge of the glazings,   a first breaking-out step,   on a second scoring workstation, tracing at least one score line corresponding to at least one other ready to shape edge of the glazings;   a second breaking-out step.   
     
     
         13 . The method as claimed in  claim 11 , comprising:
 on a first scoring workstation, tracing score lines corresponding to all of the ready to shape edges of the glazings,   breaking out said ready to shape edges.   
     
     
         14 . A machine for breaking out a complex shape from a sheet of glass, comprising:
 a scoring tool and means for automatically moving said scoring tool in such a way as to create a score line perpendicular to a surface of the glass on a first face of the sheet of glass;   a local pressure means and means for automatically moving the local pressure means and/or the sheet of glass relative to the other, the machine being configured to press the local pressure means against an opposite face to the first face of the sheet of glass and move the local pressure means opposite and along the score line so as to break out the complex shape.   
     
     
         15 . The breaking-out machine as claimed in  claim 14 , further comprising a planar-support means against said first face of the sheet of glass, opposite the local pressure means. 
     
     
         16 . The method as claimed in  claim 6 , wherein the ball or roller is rounded.