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Adiabatic Nozzle of TZM Hot Runner

The heat source of adiabatic nozzle of TZM hot runner from the injection machine nozzle or manifold has been heated molten plastic. TZM hot runner nozzle impact adiabatic heat balance in general there are several factors:
1. Adiabatic nozzle length. Generally nozzle length is less than two times the nozzle diameter, L <40mm, the only way to reduce heat loss is reduced to ensure the smooth flow of the temperature difference. Otherwise, they will increase manifold temperature lead runner plate temperature is too high, at more than plasticizing temperature causes the plastic to decompose.
2. The thickness of the heat insulating layer refers to the thickness of the gap between the nozzle and the nozzle sleeve. Insulation layer is too thin too quickly due to the heat conduction cooling nozzle rapidly solidified plastic nozzle runner can not continue to work; insulation layer is too thick so that the nozzle volume increases, the huge structure, but also to affect the heat balance at the gate.
3. The nozzle material. Because the gate nozzle temperature must be within the plastic molding temperature range, TZM hot runner nozzle adiabatic passage plate came from the only source of heat, in order to fully utilize this heat, you must minimize the manifold and nozzle temperature difference at the gate (ie temperature drop value). To this end, the nozzle should be used in general good thermal conductivity material.

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