Molds & Tooling
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PSU High Mold Temperature and Low Cooling Efficiency
Problem Phenomenon
PSU high mold temperature process causes long cooling time and low capacity; shortening cooling causes deformation and stress problems; the efficiency-quality contradiction.
Cause Analysis
PSU mold temperature is required at 150~180°C to improve flow and reduce stress; high mold temperature extends the time to reach demolding stiffness; cooling efficiency and stress control trade off against each other.
Solution
①Optimize cooling channels close to heat sources; ②For large parts, it is recommended to plasticize before mold opening to assist cooling; ③Evaluate variable mold temperature technology; ④Determine the balance between cooling time and stress through testing.
Key Takeaway
The cooling cost of PSU high mold temperature needs technical means to offset; plasticizing before mold opening is a practical technique for large parts; the balance point is found through testing.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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