Molds & Tooling
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Mold temperature differences in different areas affect product quality
Problem Phenomenon
Mold temperature differences in different areas affect product quality
Cause Analysis
Temperature difference between cavity and core too large, product warps
Mold temperature at the gate area too high, insufficient cooling at the gate area
Mold temperature differences between thick and thin areas of the product need targeted settings
Multi-cavity molds have independent temperature control for each cavity but the settings are not unified
Cellulose acetate butyrate crystallinity requires a higher mold temperature to ensure complete crystallization (PA type)
Solution
Reasonably set the cavity-core temperature difference (core 5-10°C higher)
Strengthen cooling in the gate area
Set mold temperature separately for thick and thin areas
Unify multi-cavity mold temperature settings
Set PA type mold temperature to the higher value of 40-80°C to promote crystallization
Key Takeaway
Mold temperature gradient needs to be set according to area and material characteristics
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