TZM Externally Heated Hot Runner Nozzle
- Details
- Category: Molybdenum knowledge
- Published on 03 April 2015
- Written by limei
- Hits: 302
The heat source of TZM externally heated hot runner nozzle from the two aspects: one is at the root of the injection machine nozzle manifold connected to the nozzle or molten plastic flow, and the second is the outer periphery of the nozzle heating coil. TZM hot runner nozzle to simple structure, with the runner runner straight plate connected to a small flow resistance, and there are external heat source, the nozzle length is almost unlimited. However, due to the structure of the relationship, somewhat less heat utilization, heat balance at the gate and difficult to control. From the heat balance analysis, radial nozzle little difference in temperature (except the gate), in the axial, due to the lower ends of the nozzle at the gate in contact with the fixed mold temperature, while the other position is relatively high temperature, the temperature difference.
Externally heated nozzle due to external heat source, it can be designed according to the requirements without restriction on its length principle; due to external heat transfer nozzle itself is a body, require good thermal conductivity material.
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