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Method and apparatus for making composite pipes with high mechanical and tribologic characteristics, and pipes obtained by said process
Method and apparatus for making composite pipes with high mechanical and tribologic characteristics, and pipes obtained by said process
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机译:制备具有高机械和摩擦学特性的复合管的方法和设备,以及通过所述方法获得的管
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摘要
Prodn. of a tube of composite material from a tissue of reinforcing fibres and a sheet of matrix material, both available on feed rolls, comprises: (1) preheating a mandrel; (2) fixing the tissue and sheet on the mandrel; (3) rotating th mandrel to wind on th tissue and sheet under tension; (4) continuing winding while heating the composite material and cooling the mandrel until the desired tube dia. has been attained; (5) stopping th heating and rotation; (6) stopping the cooling when the mandrel has reached its preheat temp.; and (7) removing the mandrel. Also claimed is a machine for making a tube as above, comprising a support structure with two mountings between which the mandrel (10) is placed so as to be rotatable by a drive unit, where the mandrel has slits for attaching the tissue and sheet; feed rolls (20,22) for maintaining the tissue and sheet under tension while they are wound onto the mandrel; and a heater (16) located in a welding zone between the (incoming) tissue and sheet. Also claimed is a composite material produced on the basis of the simultaneous winding of (a) a tissue of reinforcing fibres comprising naked fibres impregnated with a polymer and (b) a sheet of matrix material comprising the same polymer and an additive.
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