Methods and apparatuses for fabricating glass articles

Patent metadata

Field	Value
Publication number	US-9975799-B2
Application number	US-201715472593-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Jul 14, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Methods of fabricating formed glass articles are described herein. In one embodiment, a method for fabricating a formed glass article may include forming a glass ribbon, forming a parison, and shaping the parison to form a glass article. The glass article may be attached to the glass ribbon at an attachment region defining an edge of the glass article. The process may also include contacting the attachment region with a focal line of a laser beam and separating the glass article from the glass ribbon at the attachment region. The attachment region may be perforated by the laser beam and the focal line may be substantially perpendicular to the plane of the glass ribbon.

First claim

The invention claimed is:

1. A glass ribbon machine for forming glass articles, the glass ribbon machine comprising:
rollers for forming a glass ribbon having a substantially planar topside and a substantially planar underside;
a conveyor for conveying the glass ribbon;
blowheads for forming parisons in the glass ribbon, the parisons being attached to the glass ribbon at an aperture formed in the glass ribbon, such that the parisons are hollow with an opening at the aperture of the glass ribbon and extends from the underside of the glass ribbon;
paste molds for shaping the parisons into glass articles, the glass articles attached to the glass ribbon at an attachment region, the attachment region comprising an area proximate the edges of the aperture, the attachment region defining an edge of the glass article; and
a laser separation system comprising a focal line of a laser beam contacting the attachment region, the focal line substantially perpendicular to a plane of the glass ribbon with sufficient intensity to spontaneously separate the glass article from the glass ribbon at the attachment region.

2. The glass ribbon machine of claim 1 , wherein the laser separation system comprises an optical assembly operable to focus the laser beam.

3. The glass ribbon machine of claim 1 , wherein the laser separation system comprises one or more moving mirrors operable to move the laser beam in a circular path.

4. The glass ribbon machine of claim 1 , wherein the laser beam has a repetition rate of between about 1 kHz and 2 MHz.

5. The glass ribbon machine of claim 1 , wherein the glass article is a substantially hollow container comprising an opening, wherein the opening was the aperture in the glass ribbon.

6. The glass ribbon machine of claim 1 , wherein the attachment region is cylindrically shaped and defines an outer edge of a mouth of the glass article.

7. The glass ribbon machine of claim 1 , wherein the conveyor conveys the attached glass ribbon and glass article at a velocity of at least about 1 m/s.

8. The glass ribbon machine of claim 1 , wherein the glass ribbon comprises a plurality of formed glass articles attached thereto prior to separating the glass articles from the glass ribbon.

9. The glass ribbon machine of claim 1 , wherein the laser beam has a pulse duration between about 1 picosecond and about 100 picoseconds.

10. The glass ribbon machine of claim 1 , wherein the laser beam has a repetition rate of between about 1 kHz and 2 MHz.

11. The glass ribbon machine of claim 1 , wherein the glass article and the glass ribbon are transparent to a wavelength of the laser beam.

12. The glass ribbon machine of claim 1 , wherein the focal line of the laser beam has a length sufficient to contact only the attachment region.

13. The glass ribbon machine of claim 12 , wherein a body of the glass article has a diameter larger than an outer edge of a mouth of the glass article.

14. The glass ribbon machine of claim 1 , wherein the glass ribbon and the focal line of the laser beam are in motion while the laser contacts the attachment region.

15. The glass ribbon machine of claim 1 , wherein the separation of the glass article from the attachment region does not form glass chips or other debris of greater than about 200 microns.

16. The glass ribbon machine of claim 1 , wherein the focal line of the laser beam moves in a circular direction relative to the glass ribbon.

17. The glass ribbon machine of claim 1 , wherein the laser beam has a repetition rate of between about 1 kHz and 2 MHz, and contains 2-25 pulses per burst.

18. The glass ribbon machine of claim 1 , wherein the glass ribbon comprises a plurality of formed glass articles attached thereto prior to separating the glass articles from the glass ribbon.

19. The glass ribbon machine of claim 1 , wherein the laser beam has a pulse duration between about 1 picosecond and about 100 picoseconds.

20. The glass ribbon machine of claim 1 , wherein the laser beam has a repetition rate of between about 1 kHz and 2 MHz.

21. The glass ribbon machine of claim 1 , wherein the glass article and the glass ribbon are transparent to a wavelength of the laser beam.

22. The glass ribbon machine of claim 1 , wherein the focal line of the laser beam has a length sufficient to contact only the attachment region.

23. The glass ribbon machine of claim 1 , wherein a body of the glass article has a diameter larger than an outer edge of a mouth of the glass article.

24. The glass ribbon machine of claim 1 , wherein the glass ribbon and the focal line of the laser beam are in motion while the laser contacts the attachment region.

25. The glass ribbon machine of claim 1 , wherein the separation of the glass article from the attachment region does not form glass chips or other debris of greater than about 200 microns.

26. The glass ribbon machine of claim 1 , wherein the focal line of the laser beam moves in a circular direction relative to the glass ribbon.

Assignees

• Corning Inc

Inventors

• Bookbinder Dana Craig
• Nieber Albert Roth
• Logunov Stephan Lvovich
• Tandon Pushkar
• Tsuda Sergio

Classifications

• B23K2103/50

  Inorganic materials other than metals or composite materials · CPC title

• B23K26/38

  by boring or cutting · CPC title

• B23K26/103

  the laser beam rotating around the fixed workpiece (B23K26/28 takes precedence) · CPC title

• B23K26/402

  involving non-metallic material, e.g. isolators · CPC title

• C03B21/04

  by punching out · CPC title