method and device for anformung of elbows with the muffeninnenwand a coalescence on the part of the tube of rohrschuessen from thermoplastic plastic

摘要

The end of the pipe is preheated and inserted into a cylinder block of desired shape, an internal mandrel moves in and presses the pipe end outwards to that shape, forming the joint socket, an internal eccentric moulding ring then moves against the inner wall and by means of an eccentric cam revolving inside the ring, is rolled outwards to produce a circumferential channel in the socket, so as to take a sealing ring is service. Simultaneously a similar device can dress the inner wall if required.