INJECTION ASSEMBLY FOR A PLASTIC INJECTION MOULD AND METHOD FOR MAKING THE ASSEMBLY

摘要

An injection assembly for a plastic injection mould includes heating nozzles for injecting a plastic material into the mould, with the plastic material being supplied thereto by a central nozzle from a barrel extruder, means for controlling the nozzles and means for heating the nozzle supply channels. The assembly is characterised in that it has a base (4) bearing a heating distributor (20) provided with injection nozzles (5A) extending through the die (2), said base (4) being a moulded steel or cast iron part with rigidifying ribs and locating supports (13) for the heating distributor (20), which is a moulded steel or cast iron part forming a set of heating passages (26) connected to the central nozzle and to the injection nozzles and including blocks (24) for receiving the nozzles (5A) and supporting the heating distributor (20) on the base (4).