Tubular sections - of extruded thermoplastic to be expanded in a mould for cladding

摘要

The extruded thermoplastic tubular blanks are produced in dimensions to allow expansion under pressure in a mould. After removal of the headpiece, the tubing is clad with rovings of glass fibre to give a profiled glass fibre-reinforced plastic tubing for bends or junctions, in a high density material which is not cracked or distorted.