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Method for continuous manufacturing of a double walled corrugated pipe with a socket, the double walled corrugated pipe and the apparatus for performing the method
Method for continuous manufacturing of a double walled corrugated pipe with a socket, the double walled corrugated pipe and the apparatus for performing the method
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机译:具有插座的双壁波纹管的连续制造方法,双壁波纹管和执行该方法的设备
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摘要
The method involves extruding external tube (37) and internal tube (39). The internal tube and troughs (40) of external tube are welded together and external tube is expanded to form expanded area for pipe socket (41). A transition portion (61) is formed between pipe socket and adjacent trough and area between internal and external tubes is vented into adjacent elevation (38) in the vicinity of transition portion. Independent claims are also included for the following: (1) twin-wall pipe; and (2) apparatus for manufacture of twin-wall pipe.
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