SCREW DESIGN OF LOW MFI POLYMERS e.g. PE/PP, Injection Molding (Machine)

Kenplas Forum ==> Injection Molding (Machine) ==> SCREW DESIGN OF LOW MFI POLYMERS e.g. PE/PP

SIR,
CAN ANY ONE SUGGEST A RIGHT DESIGN OF SCREW FOR SOLUTION OF OUR PROBLEM?

WE PROCESS 0.30 MFI HDPE MATERIAL TO MAKE PE PREFORMS (WHICH IS BLOWN INSINGLE STAGE IBM M/c) WT. RANGING 60g ~ 100g ON A IBM M/c HAVING 45 Dia. SCREW & 160 + 10 mm STROKE.

WE R FACING A PROBLEM OF GENERATING OF BLACK & BROWN SPECS RANDOMLY AFTER FEW WEEKS.

ON INCREASING A COMPRESSION RATIO FROM 1.35 TO 1.6, IT WAAS REDUCED TO 40% BUT ANOTHER QUALITY RELATED PROBLEMS LIKE BLACK LINE ALONG P[ARTING LINE HAS BEEN STARTED.

2009-12-28 15:16:27 By sanjay mehta


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