Apparatus for forming bellings on thermoplastic pipes

Details Apparatus for forming bellings on thermoplastic pipes Apparatus for forming bellings on thermoplastic pipes

1997-04-03

1999-01-26

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

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

Including shaping means comprising fluid pressure contacting...

425392, 425393, 425DIG218, B29C 5708

Patent

active

058635696

ABSTRACT:
A tool for automatically forming on thermoplastic pipes, bellings of considerable longitudinal extension for sealingly joining pipes subject to high stresses. The tool includes a shaped spindle on which there is axially inserted a heated end of the thermoplastic pipe, and a first and second mechanical body that receives pressurized fluids which act on the pipe. The heated pipe end is plastically deformed in the region of the shaped portion of the spindle to form an annular seat and bell portion of the belling.

REFERENCES:
patent: 3773456 (1973-11-01), Salz et al.
patent: 3893794 (1975-07-01), Acda
patent: 3899280 (1975-08-01), Bailey et al.
patent: 3998578 (1976-12-01), Acda
patent: 4266926 (1981-05-01), Gordon
patent: 4277231 (1981-07-01), Gordon
patent: 4625383 (1986-12-01), Vassallo et al.
Patent Abstracts of Japan, vol. 005, No. 076 (M-069), 20 May 1981.

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