US 2022/0017401 A1 · DEVICE AND METHOD FOR LENGTH CUTTING IN ULTRATHIN GLASSES

Abstract

A method for the production of glass ribbon portions is provided that includes: transporting a glass ribbon at a velocity v1, wherein the velocity v1 is dependent on the predetermined glass thickness (d1), with the application of a tensile stress parallel to the edges of the glass ribbon, in a plane E1, and cooling the glass ribbon at a cooling rate that is dependent on the predetermined glass thickness (d1), inserting a score on the surface of the glass ribbon in at least one edge area by scoring the glass surface with a scoring tool, wherein the score has an angle a to the transport direction of the glass ribbon, deflecting the glass ribbon in a plane E2 to generate a bending stress and separating a glass ribbon portion with the formation of edges by breaking the glass ribbon on the extension of the score running transversely to the glass ribbon.

Claims21

Dependent claims

A method for producing glass ribbon portions, comprising:

hot forming a continuous glass ribbon with a ribbon thickness (d) in a range from 15 μm to 150 μm from a glass melt;
cooling the glass ribbon at a cooling rate that is dependent on the ribbon thickness (d);
transporting the glass ribbon along a first plane in a transport direction and at a first velocity (v1) so as to provide a tensile stress parallel to edges of the glass ribbon;
generating a score in a surface the glass ribbon using a scoring tool at a scoring velocity (vscore) and at an angle (β) to the transport direction;
and
diverting the glass ribbon from the first plane to a second plane so as to generate a bending stress with a main stress line with a glass ribbon portion breaking from the glass ribbon through spontaneous crack propagation at the score along the main stress line in a direction of the ribbon thickness (d) of the glass ribbon.

3 more elements

Dependencies are inferred from the claim text.

Device and method for length cutting in ultrathin glasses

Life of this patent

Device and method for length cutting in ultrathin glasses

Life of this patent

Abstract

Claims21