EXTRUSION HEAD FOR MOULDING SHAPED PLASTIC ARTICLES

摘要

chemical engineering. SUBSTANCE: invention can be used in manufacture of different shaped articles from plastics by extrusion. Extrusion head has body with feed channel, regulating channel and die with shaping channel. Regulating channel is made in separate body built between feed and moulding channels. Body is provided with ring grooves open on outer surface of body, and ring projections on its inner surface. Regulating channel body can be expanded - compressed at axial displacement in guide bushing under action of force applied to end face body of regulating channel with changing of its cross- section. EFFECT: improved conditions of regulation for changing resistance in section of regulating channel, possibility of changing over to remote regulation, prevention of extrudate wedging in of regulation. 2 dwg