发明名称 |
METHOD AND APPARATUS FOR THE CONTINUOUS MANUFACTURE OF A COMPOUND PIPE WITH A PORTION WHICH IS SUBSTANTIALLY SMOOTH ON ITS OUTSIDE |
摘要 |
For the continuous manufacture of a compound pipe with a spigot which is substantially smooth on its outside, the compound pipe including a smooth internal tube and an external tube provided with transverse grooves and welded together with the internal tube, an external tube and an internal tube are extruded, the latter into the external tube. While the spigot which is substantially smooth on the outside is manufactured, its external wall is pressure-relieved by compensation chambers.
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申请公布号 |
CA2110360(A1) |
申请公布日期 |
1994.06.02 |
申请号 |
CA19932110360 |
申请日期 |
1993.11.30 |
申请人 |
HEGLER, WILHELM |
发明人 |
HEGLER, RALPH-PETER;HEGLER, WILHELM |
分类号 |
B29C47/12;B29C49/00;B29C49/04;B29D99/00;(IPC1-7):B29D23/22;B29C47/02;B29C65/02;F16L9/133 |
主分类号 |
B29C47/12 |
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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