Method of shaping a bell end on thermoplastic pipe

Details Method of shaping a bell end on thermoplastic pipe Method of shaping a bell end on thermoplastic pipe

1976-01-15

1977-07-05

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

264313, 264322, B29C 112

Patent

active

040340570

ABSTRACT:
A method of shaping a bell end on a pipe of thermoplastic material, in which an elastic shaping ring is expanded radially in its operative position during the shaping of the bell end, and removed from the formed bell end by radial contraction. Part of a shaping mandril is moved to create a cavity into which the ring is free to contract.

REFERENCES:
patent: 3484900 (1969-12-01), Sands
patent: 3732054 (1973-05-01), Lyng
patent: 3749543 (1973-07-01), Stansbury
patent: 3755528 (1973-08-01), Gutlhuber
patent: 3853450 (1974-12-01), Acda

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