Process for forming a flange on a hollow body of thermoplastic m

Details Process for forming a flange on a hollow body of thermoplastic m Process for forming a flange on a hollow body of thermoplastic m

1987-11-23

1989-09-19

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264296, 264322, 264534, 264573, 4253871, 425398, 425400, 425410, 425415, 425419, 425423, B29C 5308, B29C 5382, B29C 5704

Patent

active

048679291

ABSTRACT:
A process and an apparatus for forming a flange on the wall portion of a hollow body of thermoplastic material with an opening at one end provides that the end part of the wall portion which defines the opening is heated and contracted by means of a force acting on the end portion from the outside thereof over the periphery thereof, whereupon the contracted end part is subjected to a pressing operation to form a flange extending around the contracted end part.

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patent: 4564495 (1986-01-01), Nilsson et al.
patent: 4704243 (1987-11-01), Nilsson et al.

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