posted April 12, 2003 09:12 PM               

I understand from the previous forum discussions that pelletised PVC works well with single screw extruders.

Are there any issues,concerns or additional requirements using pelletised rigid -pvc profile compound with a parallel twin screw extruder having about 400 kg/h ( 3 meters per minute speed)extrusion output capacity.Can you provide contact names for the companies selling extruders with the above capabilities.
Your prompt response would be appreciated.Many thanks

posted April 13, 2003 01:11 PM               

Although pellet rigid PVC compound CAN be run
in twin screw extruders (starve feeding required to avoid high amps & torque), twins are ideally suited for powder dryblend.

Major producers include Milacron, Krauss Maffei, American Maplan, Cincinnati Extrusion(Vienna),Davis Standard.

posted April 14, 2003 01:24 AM               

Thanks for your prompt response to my question.

I understand starve feeding equipment is located between hopper and extruder to allow the use of dry blend and pelletised compounds in twin screw extruders. My optimum target is 400 kg/hr (3m-3.5m/minute) profile extrusion (160mm x 190mm box with 1.5mm wall thickness) using a rigid-PVC compound.

I also understand parallel twin screw extruders are preferred for the above mentioned output rates. Would the above output rate be achievable with twin screw extruders installed with starve feeding equipment.