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1. 发明授权

US06321573B1 Process and apparatus for manufacturing a porous SiO2 preform 有权
标题翻译：用于制造多孔SiO 2预制件的方法和设备
公开(公告)号：US06321573B1
公开(公告)日：2001-11-27
申请号：US09328751
申请日：1999-06-09
申请人： Hans-Georg Fritsche , Udo Peper , Frank Neubauer , Hartwig Schaper , Jürgen Röper
发明人： Hans-Georg Fritsche , Udo Peper , Frank Neubauer , Hartwig Schaper , Jürgen Röper
IPC分类号： C03B37018
CPC分类号： C03B37/0142 , C03B19/1423 , C03B2207/46 , C03B2207/52
摘要： In a known process for the manufacture of an elongated porous SiO2 preform, SiO2 particles are deposited on the mantle surface of a cylindrical carrier rotating about its longitudinal axis. The SiO2 particles are formed by means of a plurality of deposition burners which are arranged, at a distance from one another, in at least one burner row extending parallel to the longitudinal axis of the carrier. The burners are moved in a repeated cycle back and forth along the forming preform and between turnaround points where the direction of their motion is reversed. Measures are taken in the process to prevent or reduce overheating of the preform in the turnaround point regions. These measures can lead to variations in the rate of deposition. In order to prevent this it is proposed according to the invention that the measures comprise localized removal of heat from the turnaround points (7), or a localized heat shielding of the regions (8) around the turnaround points (7), and that these measures be kept time-constant within a motion cycle. As far as concerns an apparatus suitable for implementation for the manufacture of a porous SiO2 preform, with a cylindrical carrier rotatable about its longitudinal axis, with a plurality of deposition burners arranged in at least one burner row extending parallel to the carrier's longitudinal axis, connected with one another and at a distance from one another and with a jogging device which moves the deposition burners along the carrier and between turnaround points where the direction of the motion is reversed and by means of which burners SiO2 particles are deposited on the carrier, forming the preform, it is proposed that heat sinks (12) be provided in the regions (8) around the turnaround points (7).
摘要翻译：在用于制造细长的多孔SiO 2预制件的已知方法中，SiO 2颗粒沉积在围绕其纵向轴线旋转的圆柱形载体的地幔表面上。 SiO 2颗粒通过多个沉积燃烧器形成，沉积燃烧器在平行于载体的纵向轴线延伸的至少一个燃烧器排中相互间隔一定距离。燃烧器沿着成形预制件和在其运动方向相反的转向点之间来回重复地循环移动。在该过程中采取措施来防止或减少转瓶点区域中预成型坯的过热。这些措施可能导致沉积速率的变化。为了防止这种情况，根据本发明提出了措施包括从周转点（7）局部去除热量，或者围绕转向点（7）的区域（8）的局部热屏蔽，并且这些措施在运动周期内保持时间常数。关于适用于制造多孔SiO 2预成型件的装置，具有围绕其纵向轴线旋转的圆柱形载体，多个沉积燃烧器布置在平行于载体的纵向轴线延伸的至少一个燃烧器列中，连接彼此间隔一段距离，并且具有慢跑装置，其使沉积燃烧器沿着载体移动，并且在运动方向相反的转向点之间，并且借助于燃烧器SiO 2颗粒沉积在载体上，形成提出了在周转点（7）周围的区域（8）中设置散热器（12）。

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