Method and device for forming a flange on a tubular element of a

Details Method and device for forming a flange on a tubular element of a Method and device for forming a flange on a tubular element of a

1978-03-16

1981-05-26

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264296, 264322, 425384, 425393, B29C 1700

Patent

active

042698014

ABSTRACT:
A method and a device for forming a flange at the end of a tubular, thin-walled element of a synthetic resin, said method comprising the steps arranging the element on a cylindrical moulding body having a gradually flaring, radial guide surface, introducing the end slipped onto the moulding body into a space containing a heating medium in order to heat the synthetic resin up to the softening point, producing an axial pressure between the element and the moulding body in order to shift the wall of the element over a given length along the guide surface, introducing the moulding body with the element into a space containing a cooling medium and finally by separating the mould from the moulded element, said device is principally distinguished in that the moulding body is provided with a cylindrical guide surface and a radially extending guide surface, between which surfaces a gradual junction is formed.

REFERENCES:
patent: 3435109 (1969-03-01), Flaming
patent: 3966384 (1976-06-01), Maier

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