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发明公开
CN102249531A 光纤线的制造装置以及制造方法 有权

光纤线的制造装置以及制造方法
摘要：
本发明涉及光纤线的制造装置以及制造方法，具备：加热炉，边使设置有伪棒部的光纤母材沿其长度方向移动，边进行熔融拉丝，形成光纤线；密封机构，其被设置在加热炉的上游侧的开口部上，且具备边与光纤母材的外周面接触边沿光纤母材的长度方向将该密封机构的内部空间划分成三个以上的区域的三个以上密封部件，在光纤母材被插入加热炉的状态下，抑制外部气体侵入加热炉内，利用惰性气体对加热炉进行密封；第一配管，其与加热炉连接，将气体导入加热炉；第二配管，其与区域中的距离加热炉最近的最下部区域连接，将气体导入最下部区域；气体流量控制部，其将从第一配管供给的气体的流量和从第二配管供给的气体的流量的总和控制为大致恒定。
摘要（英）：

The invention refers to an optical fiber manufacturing apparatus and manufacturing method. The optical fiber manufacturing apparatus includes: a heating furnace in which an optical fiber is formed by melt-drawing an optical fiber preform; a sealing mechanism which is provided on an opening portion located at an upstream of the heating furnace and seals the heating furnace with an inert gas; a first pipe which is connected to the heating furnace and introduces the gas into the heating furnace; a second pipe which is connected to a lowermost compartment closest to the heating furnace among the compartments and introduces the gas into the lowermost compartment; and a gas flow rate control unit which controls a total sum of a flow rate of a gas supplied from the first pipe into the heating furnace and a flow rate of a gas supplied from the second pipe into the lowermost compartment to be substantially constant.

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