Injection Molding
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Inaccurate metering caused by screw check ring wear
Problem Phenomenon
Product weight fluctuates greatly and the injection volume is unstable
Cause Analysis
The clearance between the check ring and the barrel inner wall increases due to wear, causing material leakage; glass fiber or fillers accelerate wear
Solution
Regularly check the check ring clearance (new <0.05mm, scrap >0.15mm); replace worn check rings in time; select wear-resistant check rings
Key Takeaway
Check ring performance directly affects product weight consistency and process stability
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