Method for making foam filled doors and apparatus therefor

Details Method for making foam filled doors and apparatus therefor Method for making foam filled doors and apparatus therefor

1998-07-24

2000-05-30

Ball, Michael W.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 156 78, B29C 4410, B29C 4412, B29C 4418, B32B 518

Patent

active

060688025

ABSTRACT:
A method for the assembly of doors having a pair of skins and a core of synthetic resin forms a first door element including forming a first skin and a peripheral wall to provide an upwardly opening cavity into which a foamable synthetic resin formulation is introduced. A second skin is then assembled over the cavity, and the resultant door assembly is passed through an elongated heating zone while controlling the thickness dimension of the door assembly to expand and cure the resin formulation in the cavity into a cellular resin insulating core and to bond the skins and core. The several steps are conducted seriatim at stations along a conveyor assembly.

REFERENCES:
patent: 3402520 (1968-09-01), Lee et al.
patent: 3512305 (1970-05-01), Multer
patent: 4327535 (1982-05-01), Governale
patent: 4602466 (1986-07-01), Larson
patent: 4922674 (1990-05-01), Thorn
patent: 5239799 (1993-08-01), Bies et al.
patent: 5839252 (1998-11-01), Berghoen et al.

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