Plunger to support a wall on plastics foaming and method to make

Details Plunger to support a wall on plastics foaming and method to make Plunger to support a wall on plastics foaming and method to make

1990-11-29

1992-02-25

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

249 61, 249 65, 249112, 264220, 264225, 264511, 425DIG12, 425DIG44, 425DIG112, B29C 3340, B29C 3910

Patent

active

050908855

ABSTRACT:
A plunger (10) for supporting a wall (46) of e.g. a refrigerator door against deformation from an expanding, and hardening foamed plastic (52) on the other side of the wall. An evacuated bag-formed part (18) filled with a particulate material (20), has a surface (42) showing an impression of the form of the wall (46). The plunger (10) is reshapable, so that it can serve as a plunger for walls (46) of different forms.

REFERENCES:
patent: 3001582 (1961-09-01), Kindseth et al.
patent: 3035310 (1962-05-01), Sokol et al.
patent: 3888617 (1975-06-01), Barnett
patent: 3950477 (1976-04-01), DiGiacomo
patent: 4419307 (1983-12-01), Kohara et al.
patent: 4582682 (1986-04-01), Betz et al.
patent: 4751032 (1988-06-01), Salamon et al.
patent: 4769188 (1988-09-01), Graham

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