Processing Machinery
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PA6 Warpage Deformation Countermeasures
Problem Phenomenon
PA6 flat products warp to one side after ejection, and the dimensions cannot be assembled
Cause Analysis
PA6 has large crystallization shrinkage, and when cooling is uneven, the shrinkage difference between the two sides produces warpage; the shrinkage difference in the glass fiber orientation direction is the main cause of warpage in reinforced grades; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based only on experience
Solution
Balance the mold cooling channels to minimize the temperature difference between the two sides; adjust the gate position to make the flow symmetric; use multi-point gates for glass fiber material to reduce orientation; use a shaping fixture to assist cooling if necessary
Key Takeaway
Warpage treatment prioritizes balancing cooling and flow, and fixture shaping is a remedial means; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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