发明名称 |
Method of manufacturing corrugated tubing of polytetrafluorethylene |
摘要 |
The method disclosed consists of applying a plain tubular blank in polytetrafluorethylene to a cylindrical mandrel of a diameter providing for a clearance between said blank and mandrel corresponding to the depth of the corrugations to be formed. The blank is retained at its ends concentrically with the mandrel. A wire is then wound in a helical path around the blank under a tension ensuring the forming of helical corrugations, the blank being additionally retained at its outside surface within a zone preceding the zone wherein the corrugations are being formed. On forming the corrugations all the way along the surface of the blank, the product is heat treated at a temperature between 250 and 300 DEG C.
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申请公布号 |
US4134958(A) |
申请公布日期 |
1979.01.16 |
申请号 |
US19770839556 |
申请日期 |
1977.10.05 |
申请人 |
DUNICHEV, JURY F.;DUSHENKOV, ANATOLY S.;PUGACHEV, ARKADY K. |
发明人 |
DUNICHEV, JURY F.;DUSHENKOV, ANATOLY S.;PUGACHEV, ARKADY K. |
分类号 |
B29C53/30;(IPC1-7):B29C17/00;B29F5/00 |
主分类号 |
B29C53/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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