Process for manufacturing rigid or semi-rigid pipes of reinforced plastic and similar tubular articles, consisting of winding a fibrous reinforcing material around a mandrel, enclosing the mandrel thus coated in a female mold, injecting a synthetic liquid resin into the mold and making that it seeps through the interstices of the reinforcement, between the opposite surfaces of the mandrel and the mold to eject the air occluded by the reinforcement, subjecting the mandrel and resin-laden mold assembly to a heating operation in a duration and at a temperature such, that the polymerization of the resin takes place and, subsequently, remove the mold and remove the mandrel. (Machine-translation by Google Translate, not legally binding)
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