发明名称 |
FREMSTILLING AV DOBBELTVEGGEDE SPIRALVIKLEDE TERMOPLASTROER MED EN KORRUGERT YTTERVEGG OG EN GLATT INNERVEGG |
摘要 |
A system is disclosed for the production of double-walled helically wound thermoplastic pipe. The apparatus includes an endless former (10) of the axially advancing and rotating type for forming a band of thermoplastic material (24) into a corrugated outer wall (26). An internal extruding device (28) extends along the core of the former and extrudes a second band (34) of thermoplastic material onto the interior of the outer wall. A cold shoe (36) presses the inner wall against the outer wall to form a smooth inner wall (42) of the double-walled pipe. It is also possible to provide for the insertion of a reinforcing profile in the corrugations of the outer wall. |
申请公布号 |
NO842830(A) |
申请公布日期 |
1985.01.14 |
申请号 |
NO19840002830 |
申请日期 |
1984.07.11 |
申请人 |
LUPKE, MANFRED A.A., |
发明人 |
LUPKE, MANFRED A.A., |
分类号 |
B29D23/18;B29C47/00;B29C53/78;B29D23/00;B29D24/00;(IPC1-7):B29D/ |
主分类号 |
B29D23/18 |
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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