Molds & Tooling
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ASA demolding deformation
Problem Phenomenon
ASA product deforms during ejection, deep-cavity parts bend to one side, partially rebounds gradually after ejection but flatness still out of tolerance.
Cause Analysis
At ejection the product temperature is high and stiffness insufficient, ejection force causes plastic deformation; front and rear mold temperature difference makes the two sides shrink asynchronously; Plastribution recommends setting temperatures independently for the two mold halves to compensate when demolding deformation occurs.
Solution
①Independent temperature control of front and rear molds, temperature difference set in reverse to compensate deformation; ②extend cooling to lower ejection temperature; ③enlarge ejection area with balanced layout; ④check draft angle and polishing.
Key Takeaway
The dual mold temperature independent compensation for ASA demolding deformation is a practical technique recommended by the material supplier; fine temperature adjustment in the deformation direction is more precise than large process changes; ejection system balance is the foundation.
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