Maguire progressive cavity drum pumps meter colors from 30- or 55-gal. (135- to 230-liter) drums in a smooth, non-pulsating action, achieving pressures of 200 to 300 psi (1380 to 2070 kPa). 

Controller 

• The controller ensures a high degree of metering accuracy by sensing variations in screw movement during the injection molding cycle.
• Adjust metering rate to maintain uniform color delivery.

Progressive Cavity Pump 

• The progressive cavity drum pump meters liquid color by positive displacement.

Automatic Speed Control

• Accuracy is achieved by controlling the exact degree of rotation of the drive motor, delivering precision coloring during each cycle.

Positive Displacement

• The pump consists of a single helix steel screw (rotor).
• As the rotor rotates, liquid is drawn into one end, expelling it out the other end, producing a positive displacement pumping action.

Injection Molding

• Precise metering.
• Dosing uniformly over the entire screw return cycle.
• When preset count is reached, the motor automatically switches off to ensure no excess colorant is metered.
• Motor speed is precisely held regardless of changing torque requirements.

Extrusion Following Mode

• The drum pump follows the speed of the extruder automatically.
• Accurate dosing.
• Changes to the extruder are reflected in the output of the drum pump.
• A tachometer provides AC or DC voltage output from the extruder to the pump to enable the drum pump to match the extruder as speed ramp up or down.