Mineral fiber insulation batt impregnated with extruded...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 17/04 (2006.01) B29C 47/02 (2006.01)

Patent

CA 2243736

A method of directing extruded synthetic fibers toward at least one surface of a mineral fiber insulation batt, and corresponding apparatus and resulting product. In certain embodiments, a row of extrusion heads is provided for directing extruded synthetic fibers (e.g. fibers including ethyl vinyl acetate or EVA) toward a surface(s) of the batt(s) to be impregnated with same. Optionally, extrusion heads may be provided all around the batts so as to impregnate substantially all surfaces thereof with the extruded synthetic fibers. As the fibers exit the heads, they are hit with pressurized heated air streams which cause them to go into an insipid spin which increases directional tensile strength of the resulting batt in all directions. In certain embodiments, every other batt of a plurality of batts passes over an elongated member which extends over top of the conveyor in order to more efficiently impregnate edge surfaces of the batts.

La présente invention a pour objet une méthode et une installation pour diriger des fibres synthétiques extrudées vers au moins une surface d'un panneau isolant de fibres minérales, ainsi que le produit ainsi obtenu. Dans certaines versions de l'invention, une rangée de têtes d'extrusion est utilisée pour diriger les fibres synthétiques (des fibres contenant de l'acétate d'éthylènevinyle, par exemple) vers au moins une des surfaces du panneau isolant à imprégner. Optionnellement, les têtes d'extrusion peuvent être disposées tout autour du panneau isolant de manière à en imprégner toutes les surfaces de fibres synthétiques. Dès qu'elles émergent des têtes d'extrusion, les fibres sont mises en contact avec un jet d'air chaud sous pression qui leur imprime un tournoiement destiné à accroître leur force de traction directionnelle dans toutes les directions. Dans certaines versions, un panneau isolant sur deux parmi une pluralité de panneaux est acheminé par-dessus un élément de forme allongée en prolongement au-dessus du convoyeur afin d'imprégner plus efficacement les bords des panneaux.

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