Tool insert for the gate of a hot runner nozzle for an injection moulding machine

摘要

A tool insert (10) for a hot channel nozzle in an injection moulding machine, which holds the front of the nozzle, consists of a front cylindrical section (11) with a flow channel (11a) and a head (12) for the nozzle tip. At least two chambers (23) are located between the outer wall of the head and the wall of a cut out in the tool. One chamber is connected to a supply channel for coolant, while the other chamber is connected to a removal channel for the coolant. There is a flow connection between the chambers which is located away from the mouth of the coolant channels. The cut out is cylindrical, and the hollow chambers are formed by flattening the cylindrical head sections.