Injection Molding
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Weld lines appear on PLA injection molded products
Problem Phenomenon
The strength of the product at the weld line is low.
Cause Analysis
The temperature of the PLA melt is low when it converges and the fusion is poor, and the two melt fronts cannot be well combined.
Solution
Raise the melt temperature to 190-200°C; raise the mold temperature; optimize the gate position to reduce weld lines.
Key Takeaway
PLA weld lines are related to the melt temperature and convergence conditions.
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