发明申请
US20100132407A1 METHOD FOR PRODUCING A TUBE OF QUARTZ GLASS BY ELONGATING A HOLLOW CYLINDER OF QUARTZ GLASS
审中-公开
通过开发QUARTZ玻璃的中空圆筒制造石墨玻璃管的方法
- 专利标题: METHOD FOR PRODUCING A TUBE OF QUARTZ GLASS BY ELONGATING A HOLLOW CYLINDER OF QUARTZ GLASS
- 专利标题(中): 通过开发QUARTZ玻璃的中空圆筒制造石墨玻璃管的方法
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申请号: US12451360申请日: 2008-04-29
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公开(公告)号: US20100132407A1公开(公告)日: 2010-06-03
- 发明人: Oliver Ganz , Thomas Bogdahn , Harald Hain
- 申请人: Oliver Ganz , Thomas Bogdahn , Harald Hain
- 申请人地址: DE Hanau
- 专利权人: Heraeus Quarzglas GmbH & Co. KG
- 当前专利权人: Heraeus Quarzglas GmbH & Co. KG
- 当前专利权人地址: DE Hanau
- 优先权: DE102007022272.8 20070509
- 国际申请: PCT/EP2008/055217 WO 20080429
- 主分类号: C03B23/00
- IPC分类号: C03B23/00
摘要:
In a known method for producing a tube of quartz glass by elongation, a hollow cylinder of quartz glass is continuously supplied to a heating zone, softened therein zone by zone, and a tube strand is drawn in the direction of a drawing axis out of the softened region by using a roll puller, the roll puller comprising a frame by which a plurality of puller rolls are fixed, which are rotatable around a rotation axis and which are distributed over the circumference of the tube strand and adjoining the tube strand with their cylindrical outer surface. Starting therefrom, to indicate a vertical drawing method in which a high draw ratio can also be accomplished with little constructional effort by using a take-off unit in the form of a roll puller and which simultaneously allows an optimization of the dimensional stability of the quartz glass tubes obtained, and which particularly avoids material losses caused by ovality and siding, the invention suggests that the frame of the roll puller s stationary, and the hollow cylinder and the tube strand are rotated about the drawing axis relative to one another, the relative rotation being set to a range between 0.01 and 5 revolutions per linear meter of drawn-off tube strand.
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