Low waste nozzle for injecting liq. or semi-liq. plastics

摘要

A nozzle for injecting liquid or semi-liquid plastics into a tool cavity comprises an inner body (2) with a cylindrical inner bore (6) and a coaxial cylindrical outer sleeve (1), both forming an annular chamber (3) between them. The upper end of the inner bore (6) is connected to the injection machine and the lower end has a tapering nozzle (8). A cylindrical needle (9) moves in the inner bore (6) and has a dia. 60% of the bore (6) dia.. The nozzle (8) has an inward tapering outlet (11) and the needle tip (10) has a corresponding taper.