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Kenplas Forum ==> Blow Molding (Machine) ==> SCREW DESIGN OF LOW MFI PE/PP MATERIAL
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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.
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