Injection Molding
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DSTDP periodic surface ripples
Problem Phenomenon
DSTDP product surface periodic ripples, spacing 5-15mm
Cause Analysis
Injection speed periodically fluctuates; hydraulic system unstable; screw speed unstable
Solution
1) Overhaul 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 key
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