Injection Molding
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Front zone temperature directly affects the temperature and flowability of the melt entering the cavity
Problem Phenomenon
Front zone temperature directly affects the temperature and flowability of the melt entering the cavity
Cause Analysis
Front zone temperature too high, exceeding the 170-230°C upper limit, large degradation risk
Front zone temperature on the low side, insufficient melt flowability
Front zone temperature fluctuation, unstable injection
Too large temperature difference between front zone and nozzle, cold slug risk
Front zone temperature setting did not consider cellulose acetate butyrate thermal stability
Solution
Set front zone temperature near the 170-230°C upper limit but not exceeding it
Ensure front zone temperature stability, fluctuation ≤2°C
Nozzle temperature 5-10°C lower than front zone to prevent cold slug
Carefully set front zone temperature according to cellulose acetate butyrate thermal stability
Avoid front zone temperature too high causing degradation
Key Takeaway
Front zone temperature needs stable control near the recommended upper limit
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