Molding Process
2 views
Internal bubbles and shrinkage cavities of PMMA thick-walled parts
Problem Phenomenon
Shrinkage cavities or vacuum bubbles appear in the center of thick-walled PMMA products.
Cause Analysis
The outside cools and solidifies first, hindering center feeding; insufficient holding pressure forms shrinkage cavities.
Solution
Extend holding pressure time; optimize gate size to delay freezing; staged holding pressure.
Key Takeaway
PMMA thick-walled shrinkage cavities are the result of insufficient holding pressure.
Was this helpful?
0 people found this helpful
Thank you for your feedback!