Molds & Tooling
2 views
Ejection deformation of PP thin-wall parts
Problem Phenomenon
The product deforms or is even punctured during ejection, especially prominent for deep-cavity thin-wall parts.
Cause Analysis
An unbalanced ejection system concentrates the ejection force; thin-wall parts have low rigidity, and ejection is more likely to deform when the demolding temperature is high.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Balance the ejection system and increase the ejector pin cross-sectional area; ②place more ejector pins near areas with high demolding resistance; ③extend cooling to lower the ejection temperature; ④use combined pneumatic and mechanical ejection for deep-cavity parts.
Key Takeaway
The principle of thin-wall part ejection design is distribution and balance; a composite ejection method is recommended for soft PP deep-cavity parts.; 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!