Processing Machinery
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PPSU screw design
Problem Phenomenon
Improper PPSU screw configuration; plasticizing quality and wear problems.
Cause Analysis
PPSU can be processed well with a typical general-purpose screw; but screw tip and check valve design are important; the check valve prevents melt backflow; smooth flow is needed to avoid dead spots; ball-type check valve is not recommended.
Solution
①General-purpose screw adaptation; ②ring-type check valve design; ③avoid dead spots; ④wear inspection; ⑤screw tip improvement.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The universality of PPSU screws is processing convenience; check valve design is the key detail; maintenance ensures long-term stability.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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