Patent · US Active

Drawing method for producing cylindrical components from quartz glass

US9115018B2 · kind B2 · utility

0Cited by

6References

15Claims

0Family size

Assignee

HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

Christian Neumann · Hungen, DE
Boris Gromann · Aschaffenburg, DE
Lothar Huefner · Bruchköbel, DE
Heinz Bauscher · Langenselbold, DE

Key dates

Filing date	Jun 29, 2011
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Apr 2, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P40/57
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a known drawing method for producing a cylindrical component from quartz glass, a quartz glass strand (2) is continuously drawn off from a softened quartz glass composition (13) vertically downwards in the drawing direction (3), a piece (15) with a weight G is detached from the free end of the strand at a time t1 and the cylindrical component is produced from the piece (15). When the piece (15) is detached, there may be a sudden reduction in weight, which leads to fluctuations in the thawing-off control. To counteract this, it is proposed according to the invention that a weight compensating force which acts counter to the drawing direction (3), increases over time and completely or partially compensates for the weight G of the piece (15), is applied to the piece to be detached at a time t0 before t1.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.