Injection Molding
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Periodic Surface Ripples of CMC
Problem Phenomenon
Periodic ripples with spacing 5-15mm on the surface of CMC products
Cause Analysis
Injection speed fluctuates periodically; hydraulic system is unstable; screw speed is unstable
Solution
1)Overhaul the injection system to stabilize pressure and speed; 2)Servo motor drive instead of hydraulic drive; 3)PID control to stabilize injection parameters
Key Takeaway
Ripples are caused by unstable injection; equipment overhaul and PID control are the key
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