Reinforced corrugated pipe and relative reinforcement method

Details Reinforced corrugated pipe and relative reinforcement method Reinforced corrugated pipe and relative reinforcement method

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 9/12 (2006.01) F16L 9/06 (2006.01) F16L 11/15 (2006.01)

Patent

CA 2408810

The invention relates to a system for stabilising the shape, and reinforcing and preventing shrinkage of cups of double-walled corrugated pipes in a plastic material, more particularly polyolefins and PVC, by drilling and subsequent injection into their closed annular ribs, which in this way also serve as forming moulds, of sufficiently fluid and preferably fast-setting materials, in quantities such as to fill the whole mould, capable after their solidification of withstanding external stresses mainly caused by shrinkage of the cup which tends to regain the position of molecular equilibrium, corresponding to its extrusion shape; these operations of drilling and injection being preferably performed during the phase of forming of the cup, therefore before the start of possible phases of shrinkage.

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