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    • 5. 发明授权
    • Method for elongating a cylinder of silica glass
    • 二氧化硅玻璃圆筒伸长方法
    • US06938442B1
    • 2005-09-06
    • US09958245
    • 2000-03-22
    • Clemens SchmittKarsten BräuerUwe ChristiansenRainer KöpplerHeinz Fabian
    • Clemens SchmittKarsten BräuerUwe ChristiansenRainer KöpplerHeinz Fabian
    • G02B6/00C03B20/00C03B23/045C03B23/047C03B37/012C03B37/025
    • C03B37/025C03B23/045C03B23/047
    • According to a prior art method for producing a cylindrical component comprised of silica glass, a cylinder comprised of a softened silica glass mass is drawn in a predetermined drawing direction along a drawing axis by means of a drawing device which acts upon said cylinder. The aim of the invention is to provide a method which prevents, to the greatest possible extent, warping of the drawn cylinder and other deviations from the ideal cylinder dimensions and to prevent, to the greatest possible extent, the outer surface of the drawn cylinder from being touched. To these ends, the invention provides that the drawing device comprises a plurality of guide elements which are arranged one behind the other along the drawing axis, and which can be displaced independently of one another in a drawing direction and in a direction opposite thereto. At least two of said guide elements which maintain an engaging distance from one another are simultaneously displaced, in a frictionally engaged manner, on the cylinder in a drawing direction and with an identical drawing speed. A device suited for carrying out the inventive method comprises a feed device, a heating zone and a drawing device by means of which a cylinder is drawn along a drawing axis and in a predetermined drawing direction with a controlled drawing speed. The drawing device comprises a number of drawing elements which are arranged one behind the other along the drawing axis and which can be displaced independently of one another in a drawing direction and in a direction opposite thereto.
    • 根据用于制造由石英玻璃构成的圆柱形部件的现有技术方法,由软化石英玻璃组成的圆筒通过作用在所述圆筒上的拉伸装置沿着拉伸轴线沿预定的拉伸方向拉伸。 本发明的目的是提供一种方法,其最大可能地防止拉伸圆柱体的翘曲和其它偏离理想圆柱体尺寸的偏差,并且在最大可能程度上防止拉拔圆柱体的外表面从 被触动 为此,本发明提供了一种拉伸装置,其包括多个引导元件,该引导元件沿着牵引轴线一个接一个地布置,并且可沿着与拉伸方向相反的方向彼此独立地移位。 保持彼此接合距离的至少两个所述引导元件在摩擦接合的方式上同时沿拉伸方向和相同的拉拔速度移动。 适于实施本发明的方法的装置包括进料装置,加热区和拉伸装置,借助于该装置,以受控的拉伸速度沿着拉伸轴和预定的拉伸方向拉伸圆筒。 拉伸装置包括多个沿着拉伸轴线彼此排列的拉伸元件,并且可以沿着拉伸方向和与其相反的方向彼此独立地移位。