Process for vacuum forming a stud plate from a plastic sheet

Details Process for vacuum forming a stud plate from a plastic sheet Process for vacuum forming a stud plate from a plastic sheet

1995-07-06

1998-01-13

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

B29C 6700

Patent

active

057075824

ABSTRACT:
A process for producing a stud plate from plastic by vacuum forming uses a positive mold (21) in which these is held on the end face (32) of each stud (28), a flexible elastic disc which protrudes with a part (45) of its flexible length over the edge. A projection (22, 24) of a hollow stud is formed thereon. During demolding a part (44) of the disc lying radially further inwards bends upwards from the end face, so that the protruding part (45) yields and readily slides along the inner wall (49) of the previously molded hollow stud (11).

REFERENCES:
patent: 1580485 (1926-04-01), Hahn
patent: 3126582 (1964-03-01), Scott
patent: 3378888 (1968-04-01), Robertson

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