| 摘要 |
An induction weldable socket 2 comprises an inductively heatable lining 3 near the inner wall of the socket, the socket 2 being manufactured by feeding an inductively heatable lining to a transverse extrusion head 22 of an extruder 21 and cutting the extruded pipe with lining 3 from the extruder to a socket 2. The inductively heatable lining 3 may be fed to the extrusion head 22 as a hose 37 assembled or woven from conducting wires or a tube 37 formed from a strip of gauze 34 or an assembly consisting of short-circuited 19a windings obtained by spirally winding a conducting wire 27. An apparatus for manufacturing the socket comprises an extruder 21 with a transverse extrusion head 22 and an orifice 26 for supplying the inductively heatable lining 3 to the extrusion head 22. The apparatus further comprises a calibrating head 23, a cooling device 24, a draw bench and a shortening device 33. In case of a tube 37 as lining the apparatus comprises tube forming means 29; 35, 36 for forming a tube from a strip of gauze of conducting material. In case of a woven hose 37 as lining the apparatus comprises weaving means 38, 39 for weaving a hose 37. In case of a lining consisting of short circuited windings of a spirally wound conducting wire, the apparatus comprises means 27a, 29a for forming a spirally wound conducting wire and means 18, 20 for short circuiting windings of the spirally wound wire by another conducting wire 19. A socket 2 is connected with a penetrating pipe end 1a, 1b by heating the inductively heatable lining 3; 37; 19, 27 by means of an induction coil 10. |
