Processing Machinery
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PPS Grinding Equipment
Problem Phenomenon
After regrind grinding, particle size is uneven with much powder, and part performance fluctuates after blending
Cause Analysis
PPS is highly brittle and easily produces fine powder and debris during grinding; uneven particle size affects plasticizing consistency; a carbide-blade grinder should be selected and the rotation speed controlled; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
①Use carbide blades for the grinder; ②Control grinding speed to reduce fine powder; ③Use regrind after sieving and classification; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The key point of PPS grinding is controlling fine powder; carbide blades plus sieving classification ensure regrind consistency; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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