Injection Molding
4 views
Weight fluctuation of PP products
Problem Phenomenon
The product weight is unstable during continuous production.
Cause Analysis
Injection metering fluctuation, backflow from non-return ring wear, or unstable melt temperature all cause weight fluctuation.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Disassemble and inspect the non-return ring; ②stabilize the melt temperature; ③check the metering repeatability; ④establish weight SPC monitoring.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Key Takeaway
Weight fluctuation is a comprehensive signal of equipment and process stability; SPC monitoring can give early warning.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
Was this helpful?
0 people found this helpful
Thank you for your feedback!