Molds & Tooling
6 visualizações
Contamination by Decomposed Material After PSU Shutdown
Fenómeno do problema
When production resumes after PSU shutdown, products show black specks, impurities and abnormal performance; residual decomposed material in the barrel was not completely removed.
Análise das causas
PSU-type materials are temperature sensitive; residual melt in the barrel decomposes after shutdown; in discontinuous production, the melt retained in the barrel has decomposed, and continuing production without clearing it injects it into the cavity forming impurities.
Solução
①After shutdown, purge the decomposed material from the barrel before '2079851475616104452; ②Clean the barrel promptly; ③It is recommended to clean the barrel with AS, PS, PP and other materials; ④Lower the temperature during long shutdowns.
Conclusão principal
The core of PSU shutdown management is thorough removal of decomposed material; the choice of purging material is particular; the purge amount when resuming production must be sufficient.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!