- 专利标题: Method for producing a tube of glass
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申请号: US15647881申请日: 2017-07-12
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公开(公告)号: US10315947B2公开(公告)日: 2019-06-11
- 发明人: Boris Gromann , Nigel Whippey
- 申请人: Heraeus Quarzglas GmbH & Co. KG
- 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
- 代理机构: Panitch Schwarze Belisaro & Nadel LLP
- 优先权: EP14199489 20141219
- 主分类号: B23K101/06
- IPC分类号: B23K101/06 ; B23K26/53 ; C03B23/07 ; C03B23/08 ; C03B23/053 ; B23K26/38 ; B23K103/00
摘要:
A method for forming a hollow cylinder, in a single step, into a quartz glass tube with a large outer diameter and high dimensional stability is provided. To produce the tube, the cylinder, while rotating, is softened in portions in a heating zone which is moved at a relative feed rate Va and the softened portion is radially expanded by a centrifugal force and/or internal overpressure applied in the hollow cylinder bore so as to form a deformation zone. The radial expansion of the softened portion is carried out at a location-dependent radial expansion rate Vr, the profile of which along the deformation zone has a maximum value Vr,max which is smaller than 20 cm/min. The temperature in a rear heating portion of the heating zone, assigned to the end of the deformation zone, is lower than in a front heating portion assigned to the beginning of the deformation zone.
公开/授权文献
- US20170327403A1 METHOD FOR PRODUCING A TUBE OF GLASS 公开/授权日:2017-11-16
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