Molds & Tooling
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GPPS Product Deformation and Warpage
Fenómeno do problema
The product warps and deforms after demolding, resulting in poor assembly.
Análise das causas
Uneven cooling or improper holding pressure causes inconsistent shrinkage; although GPPS is a non-crystalline material, orientation stress can still cause warpage.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solução
①Balance mold cooling; ②optimize the holding pressure curve; ③extend cooling and shaping; ④adjust gate position.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
The main causes of warpage of non-crystalline materials are orientation stress and uneven cooling; mild process is the prevention direction.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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