B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/657
B29C 44/28 (2006.01)
Patent
CA 1126923
ABSTRACT The invention is concerned with an apparatus for obtaining continuous blocks of polyurethane foam, which appa- ratus comprises a foaming tunnel the lower part whereof is constituted by the conveying run of an endless conveyor belt formed by a plurality of plate-like cross members connected in hinged fashion and mounted between end driving and guiding wheels at the ends of the tunnel. A box-like housing surrounds the conveyor belt, the housing having a bottom, vertical sides of a height such that their upper edges are flush with the surface of the conveying run of the conveyor belt over its entire length, and vertical end plates, the end plate located on the upstream side of the conveyor belt being of a height equal to that of the sides and the end plate located at the downstream side of the conveyor belt being of a height less than that of the sides; the bottom, the sides and the end plates are totally or partially made of heat insulating material and the arrangement is such that the conveyor belt is located inside the insulated housing with the upper surface of its conveying run flush with the edges of the sides and the up- stream end plate. A cross partition runs from side to side of the housing and along the top between the lower and upper runs of the conveyor belt, thus dividing the space between the conveying and return runs of the belt and between the sides of the housing into an upstream chamber and a downstream chamber. The apparatus further includes first heating means adapted to heat the conveyor belt and second heating means adapted to heat the surface of the bottom of the block of foam downstream of the foaming tunnel. The apparatus of the invention enables one to manufacture blocks without densified areas at their bottom.
321321
Swabey Ogilvy Renault
Tecfoam S.a.
LandOfFree
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