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发明公开
CN101978437A 同轴电缆空心芯体的制造方法、同轴电缆空心芯体及同轴电缆 无效 - 撤回

同轴电缆空心芯体的制造方法、同轴电缆空心芯体及同轴电缆
摘要：
本发明提供高空心率且长度方向的电特性稳定的同轴电缆空心芯体的制造方法、同轴电缆空心芯体及同轴电缆。该同轴电缆用空心芯体包括：内部导体；绝缘包覆体，其包括包覆该内部导体的内环状部、自该内环状部呈放射状延伸的多个肋部和将该多个肋部的外端连结起来的外径为0.5mm以下的外环状部；该同轴电缆用空心芯体具有由上述内环状部、上述外环状部和上述肋部围成的多个空心部，上述空心部的面积占绝缘部面积的40％以上，上述外环状部的圆度为96.0％以上；该同轴电缆用空心芯体的制造方法至少进行下述工序(1)～(3)：(1)使用能形成上述绝缘包覆体的口模，自上述口模挤出熔融树脂；(2)对用于形成上述绝缘包覆体的树脂进行加热；(3)在接近于室温的温度下对用于形成上述绝缘包覆体的树脂进行慢冷却。
摘要（英）：

Disclosed is a method for producing a hollow core body of a coaxial cable having a high hollow rate and stabilized electrical characteristics in the longitudinal direction. A method for producing a hollow core body of a coaxial cable comprising an inner conductor, and an insulating coating consisting of an inner annulus covering the inner conductor, a plurality of ribs extending radially from the inner annulus, and an outer annulus having outside diameter of 0.5 mm or less and coupling the outer edge of the ribs, and having a plurality of hollow portions surrounded by the inner annulus, the outer annulus, and the ribs, wherein the hollow portions occupy 40% or more of the area of an insulating portion and circularity of the outer annulus is 96.0% or above. The method for producing a hollow core body of a coaxial cable comprises at least following steps (1)-(3): (1) a step for extruding molten resin from a die which can form the insulating coating, (2) a step for heating resin which forms the insulating coating, and (3) a step for gradually cooling the resin forming the insulating coating at around the room temperature.

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