Apparatus and method for cooling a glass strand produced by means of tube drawing
AssigneeSchott AG
InventorsVolker Trinks, Franz Ott
Life of this patent
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Abstract
The present disclosure provides the installation of an apparatus for cooling a manufactured glass rod. The apparatus has at least two cooling chambers arranged along the glass strand for sectional cooling of the glass strand. A gaseous cooling medium is either blown into the cooling chamber or sucked out of the cooling chambers. The glass strand is passed through each cooling chamber, with an orifice provided at each of the pass-through points, whose opening is larger than the cross-section or diameter of the glass strand. As a result, an annular gap forms between the opening and the surface of the glass strand, so that a turbulent flow of the gaseous cooling medium is generated, which enables a high cooling rate.
Claims20
An apparatus for cooling a glass strand produced by tube drawing, comprising:
- at least two cooling chambers arranged at a distance along the glass strand for a sectional cooling of the glass strand,
- wherein the at least two cooling chambers are connected to a device for supplying or discharging a gaseous cooling medium,
- wherein the glass strand is passed through each cooling chamber at pass-through points, and an orifice is provided at each of the pass-through points,
- wherein each of the orifices has a variable opening, and wherein the variable opening of each of the orifices is larger than a cross-section of the glass strand, in order to generate a turbulent flow of the gaseous cooling medium between the variable opening of each of the orifices and a surface of the glass strand, and
- wherein the turbulent flow of the gaseous cooling medium has a Reynolds number greater than 5000.
An apparatus for cooling a glass strand produced by tube drawing, comprising:
- at least two cooling chambers arranged at a distance along the glass strand for a sectional cooling of the glass strand,
- wherein the at least two cooling chambers are connected to a device for supplying or discharging a gaseous cooling medium,
- wherein the glass strand is passed through each cooling chamber at pass-through points, and an orifice is provided at each of the pass-through points,
- wherein each of the orifices has an opening, and wherein the opening of each of the orifices is larger than a cross-section of the glass strand, in order to generate a turbulent flow of the gaseous cooling medium between the opening of each of the orifices and a surface of the glass strand, and
- wherein each cooling chamber comprises a lower housing portion and an upper housing portion which is detachable from or hinged to the lower housing portion.
An apparatus for cooling a glass strand produced by tube drawing, comprising:
- at least two cooling chambers arranged at a distance along the glass strand for a sectional cooling of the glass strand,
- wherein the at least two cooling chambers are connected to a device for supplying or discharging a gaseous cooling medium,
- wherein the glass strand is passed through each cooling chamber at pass-through points, and an orifice is provided at each of the pass-through points,
- wherein each of the orifices has a variable opening, wherein the variable opening of each of the orifices is larger than a cross-section of the glass strand, in order to generate a turbulent flow of the gaseous cooling medium between the variable opening of each of the orifices and a surface of the glass strand, and
- wherein the size of the variable opening of each of the orifices is adapted to a dimension of the glass strand.
A method for cooling a glass strand produced by tube drawing, comprising the steps of:
- passing the glass strand through at least two cooling chambers arranged at a distance along the glass strand, for sectional cooling, wherein the glass strand passes through the at least two cooling chambers at pass-through points, and wherein the pass-through points each have an orifice with a variable opening;
- and
- forming a turbulent flow, at the pass-through points, of a gaseous cooling medium between openings of the cooling chambers and a surface of the glass strand,
- wherein the turbulent flow of the gaseous cooling medium has a Reynolds number greater than 5000.
Dependencies are inferred from the claim text.