Manufacture of thermoplastics pipe

Details Manufacture of thermoplastics pipe Manufacture of thermoplastics pipe

1980-09-10

1982-03-09

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

264533, 264535, 264570, 264573, 425526, 425541, 4253871, B29C 1707

Patent

active

043186815

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.

REFERENCES:
patent: 2983961 (1961-05-01), Titterton et al.
patent: 4049762 (1977-09-01), Martino et al.

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