Blow Molding
13 görüntüleme
HDPE '2079851475616104457 container melt fracture
Sorun Belirtisi
The parison surface is rough like sharkskin, and the container surface becomes rough accordingly.
Neden Analizi
Exit shear stress exceeds the critical value; low mold temperature and fast extrusion speed; more obvious when the regrind ratio is high.
Çözüm
①Change the extrusion pressure/speed; ②adjust the back pressure; ③reduce the regrind ratio; ④check the head heating band; ⑤increase the die temperature.
Temel Çıkarım
For rough parison, first adjust the pressure-temperature combination.
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