发明名称 |
VERFAHREN UND FERTIGUNGSSTRASSE ZUR KONTINUIERLICHEN HERSTELLUNG VON BIAXIAL-GERECKTEN KUNSTSTOFFROHREN |
摘要 |
The invention concerns a continuous manufacturing method which consists in producing a blank (E) by extrusion, bringing said blank to a temperature for molecular orientation, passing said blank around a radial expansion mandrel ( 12 ); gauging and cooling while subjecting the blank to axial traction. The radial expansion produced on the mandrel ( 12 ) is partial so that the internal diameter (B) of the blank (E), when it leaves the mandrel, is less than the nominal internal diameter (D) of the finished tube; performing an additional radial expansion of the blank, up to its nominal diameter, by internal fluid pressure. In permanent operating conditions, the inner surface of the blank (E) is no longer in contact with the mandrel ( 12 ). |
申请公布号 |
DE60116471(D1) |
申请公布日期 |
2006.03.30 |
申请号 |
DE2001616471 |
申请日期 |
2001.03.12 |
申请人 |
ALPHACAN, LA CELLE SAINT CLOUD |
发明人 |
PREVOTAT, BERNARD;DUVAL, GUILLAUME |
分类号 |
B29C47/90;B29C47/92;B29C55/26;B29L23/00 |
主分类号 |
B29C47/90 |
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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