Method of forming sharp bends in plastic faced flat panels

Details Method of forming sharp bends in plastic faced flat panels Method of forming sharp bends in plastic faced flat panels

1974-07-22

1976-03-09

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

52631, 156227, 156268, 156257, 156295, 428121, 428130, B31F 300

Patent

active

039430227

ABSTRACT:
Improved forming method permits a flat laminate panel comprising a thin, deep vacuum formed thermoplastic face surface member bonded to a rigid backing member to be bent sharply so as to form the sides and front of a cabinet, for example, in one integral piece. The bends are accommodated by removing material from the back of the panel so as to form V-grooves whose included angles are equal to the angle of bends desired. The grooves extend through the entire thickness of the backing member and a portion of the plastic layer. A small bead of hot melt adhesive placed in the groove serves to soften the plastic so it can be bent without cracking. The panel sections adjacent the V-grooves are then brought into contact and immediately and permanently bonded together by the adhesive, thus eliminating the need for additional bracing while the adhesive sets.

REFERENCES:
patent: 1133106 (1915-03-01), Cuppett
patent: 2157794 (1939-05-01), MacDonald et al.
patent: 2751321 (1956-06-01), Sans
patent: 2854373 (1958-09-01), Beach
patent: 3101602 (1963-08-01), Tosi
patent: 3539425 (1970-11-01), Marburg
patent: 3647590 (1972-03-01), Wolf
patent: 3654053 (1972-04-01), Toedter
patent: 3791002 (1974-02-01), Lampe et al.

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