Processing Machinery
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PPS screw speed upper limit
Problembeschreibung
After increasing screw speed, the product becomes brittle, glass fibers break, and strength decreases instead of rising
Ursachenanalyse
PPS screw speed should be 40-100rpm; too high speed causes shear heat to overheat the melt, and shears glass fibers causing loss of reinforcement effect; fiber length retention directly affects mechanical properties
Lösung
①Screw speed controlled at 40-100rpm; ②glass fiber grades take low speed to preserve fiber length; ③when strength decreases, first check speed and back pressure; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
The essence of PPS screw low-speed is fiber preservation; shear heat and fiber breakage are the dual costs of high speed; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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