Processing Machinery
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EVA Foaming Coarse Cells
Fenómeno do problema
The cells of foamed products are coarse and uneven, with a hard feel and poor elasticity.
Análise das causas
Poor dispersion or local excess of the foaming agent causes the cells to merge and grow; uneven mixing and temperature loss of control also cause abnormal cell structure.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solução
①Optimize the mixing process to ensure foaming agent dispersion; ②control the foaming agent addition accuracy; ③stabilize the foaming temperature; ④inspect the cell structure.; After adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusão principal
The cell structure determines the foot feel and performance of foamed products; dispersion uniformity is the premise of cell quality.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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