Molds & Tooling
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Improper PPO mold temperature management
Problem Phenomenon
When the mold temperature of PPO products is low, the surface quality is poor and the internal stress is high, and when the mold temperature is high, demolding deformation and cycle extension occur, and the mold temperature setting lacks a basis.
Cause Analysis
The recommended PPO mold temperature range is 100~150℃; high mold temperature improves flowability, reduces internal stress, and enhances surface quality; but high mold temperature extends the cooling time; uneven mold temperature is directly converted into deformation.
Solution
①Set the mold temperature at 100~150℃ and actually measure the cavity surface temperature; ②configure an oil temperature controller to meet the high-temperature requirement; ③design balanced water channels to eliminate temperature differences; ④balance cycle and quality to optimize cooling efficiency.
Key Takeaway
High mold temperature of PPO is the core means of reducing internal stress; the 100~150℃ range requires oil temperature controller support; mold temperature uniformity is more important than absolute temperature.
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