2 x 50cc Metering Pumps for Stable Melt Flow – PP Strapping Line

Melt pressure stability is the core guarantee for dimensional uniformity of extruded products. This production line is equipped with two high-precision metering pumps (50cc) between the extruder and the die, each driven by a 3KW motor. The metering pumps smooth out pressure fluctuations caused by screw rotation through forced, pulse-free gear output, ensuring constant melt flow and stable pressure into the 1-out-6 die.

The dual pump configuration distributes melt more evenly to the 6 flow channels, reducing the risk of uneven distribution from a single pump outlet. This design significantly improves dimensional consistency among the 6 strands and along the product length, controlling width and thickness tolerances stably within ±0.05mm. It is a key technology for achieving high-quality, high-uniformity products.

• Dual pump configuration: 2 x 50cc metering pumps for uniform melt distribution
• Pressure/flow stabilization: Eliminates screw pulsation, pressure fluctuation ≤±1%
• Independent drive: Each pump driven by 3KW servo/inverter motor
• High precision: Precision ground gears, high volumetric efficiency
• Heating: Pump bodies independently heated to prevent melt solidification
• Reduced dimensional variation: Stable feed leads to more uniform thickness/width
• Improved consistency: Minimizes differences among 6 strands
• Reduced scrap: Fewer thickness deviations from pressure fluctuations
• Redundancy: One pump can maintain temporary production (reduced speed) if the other fails
• High pressure capability: Can build higher backpressure for high-viscosity or modified materials