Molds & Tooling
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PCL warpage deformation
Fenómeno do problema
PCL products warp, with warpage at the edges of large-area flat surfaces or thin-walled structures exceeding 1.5mm.
Análise das causas
PCL has a slow crystallization rate during cooling and solidification, and uneven shrinkage produces internal stress; large-area or thin-walled structures release stress and deform; uneven mold temperature; improper holding pressure.
Solução
①Uniform control of mold temperature; ②Optimization of the holding pressure curve; ③Uniform structural wall thickness; ④Sufficient cooling time; ⑤Annealing to release stress.；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
The slow crystallization characteristic of PCL warpage is the material root cause; both process and structure are emphasized; 1.5mm warpage is a practical challenge.；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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