Injection mould structure with hot channels has each channel in form of cylindrical tube surrounded by electrical resistance

摘要

The structure, designed to be fitted between a press outlet and distribution channels feeding nozzle holders (8), consists of a series of channels, each in the form of a cylindrical tube (5) surrounded by an electrical resistance (11) that can raise a thermoplastic material to injection temperature. The tubes are connected at one end to a feeder, divider or distributor (7), and at the other to a nozzle holder (8) by a joint with convex and concave surfaces (13, 14) forming a rotary coupling allowing a degree of circular movement about the channel's lengthwise axis. Similar rotary couplings (14, 28) are formed between the nozzle holders and nozzles (B).