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专利名称：Co-extrusion process for making decorative
moldings having simulated wood
appearance and decorative molding madethereby
发明人：Angelo Sudano,Benoit Meloche申请号：US12724029申请日：20100315公开号：US08323545B2公开日：20121204
专利附图：
摘要：A co-extrusion process for making decorative moldings having a simulated
wood appearance and a given profile includes mixing a base material and color particlesto form a mixture, the base material having a rigid polymer and the color particles havinga different color from the base material and a higher melt temperature than the basematerial. The mixture is heated and displaced using a feed screw such that the colorparticles move helically along the trajectory of the feed screw while avoiding backflowand melting to create corresponding helical vein segments within the base material. Themixture is forced through a tubular channel while controlling heat and shear conditionssuch that the helical vein segments remain substantially intact. The mixture is fed into adie having at least a first tubular inlet communicating with the tubular channel, a firstoutlet having a planar shape corresponding to the given profile, and a first cavitybetween the inlet and the outlet, the cavity having a form to flatten and widen themixture to produce a planar surface coating at the outlet wherein the helical veinsegments are transposed into two-dimensional nested arches simulating woodappearance. The surface coating is extruded onto a first side of a core having cellularpolymer material, producing the decorative mouldings.
申请人：Angelo Sudano,Benoit Meloche
地址：Montreal CA,Blainville CA
国籍：CA,CA
代理机构：Merchant & Gould P.C.
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