Verfahren und Vorrichtung zum Anformen einer stellenweise ringfoermig erweiterten Muffe am Ende eines Rohres aus thermoplastischem Kunststoff

摘要

Means for radially expanding the end portion of a tube made of thermoplastic synthetic material provides for a mandrel having a cylindrical sheath which is longitudinally divided into a plurality of sections. Each sections is at the outer end thereof connected through a radial rod with a radial drive. The sections are collapsible inwardly towards the longitudinal axis of the tube portion. In the collapsed position the sheath sections together with the rods and drive are moved towards the tube end. By radially moving the segments into a closed position, the tube end is shaped to the desired configuration.