| 主权项 |
1. A system for moulding plastics material, comprising:
at least one injection nozzle with a cylindrical tubular body; at least one hot chamber on which said at least one injection nozzle is mounted; at least one penetrating ram rod which extends coaxially with said injection nozzle; at least two passages for supplying the moulding material to said injection nozzle; said injection nozzle comprising: at least one containing collar; at least one injection valve mounted coaxially with said containing collar and having a first end and an opposite supply end; said injection valve comprising: at least a first injection channel for a first moulding material; at least a second injection channel for a second moulding material; said first and second injection channels remaining separate as far as said supply end of said at least one injection valve, wherein said injection valve comprises i) a cylindrical valve body having a central through hole for said ram rod, ii) at least one flow diffuser keyed on said ram rod and positioned at the first end of said injection valve, and iii) a sealing element, wherein said second injection channel comprises at least three second injection channels which are spaced apart circumferentially and which extend axially along at least a portion of said valve body from said supply end; and a first circumferential passage to connect said second injection channels. |
