Patent ID: 6068802
Filing Date: 2000-05-30
Classification: B29C,E06B

Abstract:
In a method for the assembly of doors having a pair of skins and a core of synthetic resin, the steps comprising:(a) forming a pair of skins;(b) forming a first door element including a first skin and a peripheral wall providing an upwardly opening cavity;(c) introducing foamable synthetic resin formulation into said cavity at a multiplicity of locations through a multiplicity of nozzles, said locations and the amount of resin formulation being introduced at said locations being variable by computer means;(d) thereafter assembling a second skin to said first door element over said cavity to form a door assembly comprising planar face portions provided by said skins and a peripheral wall portion extending therebetween; and(e) passing said door assembly through an elongated heating zone while controlling the thickness dimension of said door assembly to expand and cure the resin formulation in said cavity into a cellular resin insulating core and to bond said skins and core.