The multi-layered plastic pipe (1) has two extruded layers of plastic, where one of the layers is made of a thermally welded plastic. A welding layer (2) is formed in a nuclear range or an external area of the plastic pipe. Another layer is formed as modified function layer (3,4)....
In all process steps, the temperature of the bodies to be connected is below the glass transition temperature of the plastic. No auxiliary substance remains in the welded body. The flush connection produced by swell welding is durable and strong.Ralf-Peter Peters...
The multi-layered plastic pipe (1) has two extruded layers of plastic, where one of the layers is made of a thermally welded plastic. A welding layer (2) is formed in a nuclear range or an external area of the plastic pipe. Another layer is formed as modified function layer (3,4)....
Equipment for welding melt-weldable plastic pipe elements, welding method wherein said equipment is used, pipe fittings to be used with said equipment and in said method, and pipe elements so obtainedThe present invention provides an apparatus and a welding method for welding welding plastics ...
Coupling two plastic tubes with male and female end pieces includes forming at least one weld line between the two parts where they are in contact. The female part may be transparent to the laser light and the male part includes a laser opaque colorant. The coupled pipes are rotated ...
Date Dec. 13, 1990.Equipment for welding pipe elements of a melt-weldable plastic material comprises a heatable metal plate and first and second heat-conductive elements attached respectively to first and second opposed faces of the plate. The first element has a concave melting surface of ...
A steel reinforcement is inserted into the hollow section, where the sections are welded in the edges through a plastic adapter, which is interposed into the reinforcement, in the fillet weld.