Material Drying
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PSU Drying Equipment Selection
Problem Phenomenon
PSU still shows moisture defects after drying in ordinary ovens; drying efficiency is low, energy consumption high, quality unstable.
Cause Analysis
PSU-type materials have high drying requirements: vacuum dehumidifying equipment at 150~160°C or hot air circulation at 160~180°C for 5~7 hours; ordinary ovens do not meet the dew point standard; drying gas flow and dew point have clear indicators.
Solution
①Select vacuum dehumidifying or qualified hot air circulation equipment; ②Drying temperature 150~180°C for 5~7 hours; ③Air flow >0.065m³/min per kg/h, dew point <-30°C; ④Verify drying effect with a moisture analyzer.
Key Takeaway
PSU drying equipment is an investment, not a cost; dew point -30°C is a hard indicator; the long drying time of 5~7 hours must be guaranteed.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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