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    • 9. 发明授权
    • Method of reducing the wall thickness of a PTFE tube
    • 降低PTFE管壁厚的方法
    • US06638468B1
    • 2003-10-28
    • US09748417
    • 2000-12-26
    • Jason P. HillJames R. LiningerBrian J. Brown
    • Jason P. HillJames R. LiningerBrian J. Brown
    • B29B1110
    • B29C67/0014B29C55/24
    • A thin wall PTFE tube is formed from an extruded green tube. The PTFE tube includes an inner tubular surface and an opposed outer tubular surface defining a tubular wall of a first thickness. The tubular wall is compressed to uniformly reduce the wall-thickness and circumferentially orient the tube. The PTFE tube is positioned over a first elongate roller with the inner tubular surface being in contact therewith. A second roller is positioned against the outer tubular surface of the PTFE tube. The pair of rollers are counter rotated so as to circumferentially compress the tubular wall between the rollers. This results in the uniform reduction in the tubular wall from the first thickness to a lesser second thickness and a circumferential orientation otherwise not occurring in an extruded PTFE paste extrusion.
    • 由挤出的绿色管形成薄壁PTFE管。 PTFE管包括内部管状表面和限定具有第一厚度的管状壁的相对的外部管状表面。 管状壁被压缩以均匀地减小壁厚并且周向地定向管。 PTFE管定位在第一细长辊上,内管表面与其接触。 第二辊定位在PTFE管的外管表面上。 一对辊被反向旋转,以便周向地压缩辊之间的管状壁。 这导致管状壁从第一厚度均匀地减小到较小的第二厚度,并且在挤出的PTFE浆料挤出中不发生圆周取向。