Common Problems and Solutions for TZM Hot Runner System
- Details
- Category: Molybdenum knowledge
- Published on 17 April 2015
- Written by limei
- Hits: 395
TZM hot runner system common problems includes glue leakage of hot manifold surface and TZM hot nozzle, TZM hot nozzle casting and hot nozzle does not work and so on.
1. Glue Leakage of Hot Manifold Surface and TZM hot nozzle
Reasons:Wrong calculation of the amount of expansion, scheduled to die fixed plate material is too soft, hot manifold short time temperature is too high, "O" - ring installation problem.
Solutions: Recalculate and check the amount of expansion, replacement of fixed mold hardness appropriate fixed plate, replacement of damaged parts and seals.
2.TZM hot nozzle casting
Reasons: Withdrawing (inverted cable) is not enough, the melting temperature is too high, the gate is too large, insufficient gate cooling, using an incorrect TZM hot nozzle type.
Solutions: increase Withdrawing (inverted cable), reduce heat TZM nozzle temperature or mold temperature, choose the appropriate nozzle head, machining correct gate size.
3.TZM hot nozzle does not work.
Resons: The heating wire or thermocouple problem, TZM hot nozzle clogging, thermal expansion nozzle calculation wrong.
Solutions: Check and replace heating wire, check, replace the thermocouple, clean TZM hot nozzle, recalculate the amount of thermal expansion nozzle.
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