Welding lengths of EVA(-coated) rain guttering - by heating adjoining ends and bonding connectors to them to bridge the gaps

摘要

The ends of elongated building components, esp. plastics or plastics-coated rain gutters, are bonded together by heating the plastics (coating) near the ends to the bonded to m.pt. and pressing a suitably profiled connecting piece of compatible plastics upon the heated surfaces so that they homogeneously weld together. The rain gutters to be bonded are of, or coated with, plastomeric EVA whilst the connecting piece is made of, or coated with, a plastic-elastomeric EVA. The connecting piece has heat-conductive, e.g. metal, inserts embedded into it. These may be coated with a plastic contg. a heat-activatable expanding agent.