Method and device for the formation of a hole in a plastic pipe

Details Method and device for the formation of a hole in a plastic pipe Method and device for the formation of a hole in a plastic pipe

B - Operations, Transporting

29

C

18/939

B29C 53/30 (2006.01) B26F 1/00 (2006.01) B26F 1/26 (2006.01) B29C 49/00 (2006.01)

Patent

CA 1265911

Abstract of the Disclosure This invention relates to a method and a device for the formation of a hole in a plastic pipe. Corru- gated pipes provided with holes are widely used as drainage pipes. According to a known method, a corru- gated pipe is first manufactured and thereafter pro- vided with holes by means of mechanical cutting devices. This manufacturing method requires two working steps, and the cutting device must be adjusted whenever the size of the pipe is changed. A pipe (11) can be provided with holes already during the manufacture thereof by providing a mandrel (8) and chill moulds (1) surrounding the mandrel and moving in the longitudinal direction thereof with openings (15, 16) which are intermittently in alignment so that when pressure air is fed into the opening (15), it is discharged through the wall (11) of the pipe into the opening (16) opposite thereto.

514252

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