Molds & Tooling
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EAA length out of tolerance
Problem Phenomenon
EAA product length deviation >±0.5mm exceeding tolerance
Cause Analysis
EAA shrinkage rate unstable with fluctuation of ±0.5%; mold dimension design did not consider shrinkage compensation; insufficient cooling, dimensions not stabilized
Solution
1) Accurately measure EAA shrinkage rate and compensate the mold; 2) Cool sufficiently to ensure dimensional stability; 3) Anneal to eliminate post-shrinkage
Key Takeaway
Length out of tolerance is caused by unstable shrinkage rate; accurate shrinkage compensation is key
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