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公开(公告)号:US5505887A
公开(公告)日:1996-04-09
申请号:US209543
申请日:1994-03-10
CPC分类号: B29C47/86 , A61L29/041 , B29C47/0004 , B29C47/0023 , B29C47/24 , B29C47/862 , B29C47/864 , B29C47/866 , B29C47/0016 , B29K2027/18 , B29L2031/753
摘要: An improved extrusion method is employed in a process which is used to form tubing for medical applications. The method includes providing an extrusion apparatus having a die which includes a die cavity and a mandrel within the die cavity. The die is rotated in a first rotational direction while the mandrel is rotated in a second rotational direction opposite the first direction. While the die and the mandrel are rotating, a PTFE paste is passed through the annular passage defined between the die and the mandrel. The die cavity is cooled to maintain the PTFE paste passing therethrough at a substantially non-elevated temperature.
摘要翻译: 在用于形成用于医疗应用的管道的方法中采用改进的挤出方法。 该方法包括提供具有模具的挤出设备,该模具在模腔内包括模腔和心轴。 模具沿着第一旋转方向旋转,同时心轴沿与第一方向相反的第二旋转方向旋转。 当模具和心轴旋转时,PTFE浆料通过限定在模具和心轴之间的环形通道。 冷却模腔以保持PTFE浆料在基本上不升高的温度下通过。