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1. 发明授权

US4146373A Bushing construction 失效
标题翻译：衬套施工
公开(公告)号：US4146373A
公开(公告)日：1979-03-27
申请号：US864047
申请日：1977-12-23
申请人： Timothy A. Sullivan , Barclay P. Gano
发明人： Timothy A. Sullivan , Barclay P. Gano
IPC分类号： C03B37/08 , F27B14/00 , C03B37/00
CPC分类号： C03B37/08 , Y10S65/04
摘要： Improved construction for bushings used to produce glass fibers is provided. Such bushings commonly have thin side and end walls of precious metal defining a glass-melting chamber, with a bottom in which fiber-forming tips are located. Refractory material is located around the side and end walls. When the bushings are heated to operating temperatures, the metal walls tend to expand more than the refractory material and, particularly with larger bushings, the walls can buckle and crack since full expansion of the walls is prevented by the refractory material. To overcome this, it has been found that the bushings can be constructed with space between the metal walls and the refractory, with the space equalling the difference in expansion of the two materials. The space is formed by layers of heat-removable material, such as wax which melts out as the bushings are heated. When the bushings are at operating temperature then, the metal walls expand into the space and come into contact with the surrounding refractory material.
摘要翻译：提供了用于生产玻璃纤维的衬套的改进结构。这种衬套通常具有限定玻璃熔化室的贵金属的薄侧壁和端壁，其中形成有纤维形成尖端的底部。耐火材料位于侧壁和端壁周围。当衬套被加热到工作温度时，金属壁倾向于比耐火材料膨胀，特别是对于较大的衬套，壁可以弯曲和破裂，因为通过耐火材料防止了壁的充分膨胀。为了克服这个原因，已经发现，衬套可以在金属壁和耐火材料之间形成空间，空间等于两种材料的膨胀差。空间由可热去除的材料层形成，例如当衬套被加热时熔化的蜡。当衬套处于工作温度时，金属壁膨胀到空间中并与周围的耐火材料接触。

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