SPEICHERKOPF FUER DIE HERSTELLUNG MEHRSCHICHTIGER COEXTRUDIERTER SCHLAEUCHE AUS KUNSTSTOFF.

摘要

A feeder for the prodn. of laminated plastic coextruded tubing to be used as parisons in blow moulding has a no. of coaxial annular feed bores connected to their respective extruders to provide one layer each and joining together to form the laminate. Each annular bore is between an inner and an outer sealing lip; to move the laminate outwards an inner and an outer ring piston can be moved over the faces of these sealing lips.