PVC injection unit, PVC plasticizing system
Yashi Screw has developed specific injection unit solutions for rigid PVC, with low compression ratio screw profiles, the option of monolithic screw design to reduce ‘hang-ups’ and barrel cooling fans/mica bands to aid the removal of excess shear heat.
Screw & Barrel Design Considerations
Long, gradual transition area prevents burning and degradation
Compression ratio: 2.2:1
Flight profile: 35% Feed/50% Transistion/15% Metering
Keep residency time to a minimum
Smear tips prevent burning
