Manufacture of thermoplastics pipe

Details Manufacture of thermoplastics pipe Manufacture of thermoplastics pipe

B - Operations, Transporting

29

C

18/938

B29C 49/48 (2006.01) B29C 49/30 (2006.01)

Patent

CA 1147923

Case No M30966/ Specification for CANADA Application claiming priority of corresponding UK Application No 7932060 dated 15.9.79 Inventors: William Charles Aston of 39 Quarry Lane, Hasbury, Halesowen, Birmingham and Derek Walker of 10 Woodlands Avenue, East Ardsley, Near Wakefield, Yorkshire, both British Subjects. TITLE: Manufacture of thermoplastics pipe APPLICANTS: IMI Yorkshire Imperial Plastics Limited, (formerly known as Yorkshire Imperial Plastics Limited), a British Company of, PO Box 166, Leeds LSl lRD. ABSTRACT: Apparatus for use in the manufacture of socketed thermoplastics pipe by the radial expansion of a pipe blank. The apparatus includes an open-ended central mould portion 12 which can be raised or lowered on stanchions 10, 11 to three predetermined positions; a pair of mould end portions 15, 17 each having a supporting mandrel 19, 20 engageable with the pipe blank 28, end portions 15, 17 being advanceable to and retractable from the central mould portion 12. One of the mould end portions 15 is internally contoured to provide part of the socket-forming portion of the mould. The mould end portions 15, 17 can be held in an intermediate position, partially advanced towards the central portion 12 to locate the blank 28 on mandrels 19, 20 before closing of the mould.

359926

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