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2 x 50cc Metering Pumps for Stable Melt Flow – PP Strapping Line
Product Overview
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.
Technical Specifications
Parameter
Value/Description
Number of metering pumps
2 units
Displacement per pump
50 cc/rev
Drive motor power
3KW * 2 units
Working medium
PP melt
Temperature control
Independent heating, linked with extruder temp. control
Pressure fluctuation suppression
Melt pressure fluctuation ≤±1%
Applicable extruder
φ120mm single screw
Key Features & Benefits
Dual pump configuration: 2 x 50cc metering pumps for uniform melt distribution
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
Frequently Asked Questions
Q: Why two metering pumps instead of one?
A: Two pumps in parallel distribute melt more evenly to the 6 channels of the 1-out-6 die. Each pump handles part of the channels, reducing the risk of uneven distribution from a single pump outlet, and provides redundancy for higher reliability.
Q: Do metering pumps increase melt pressure? Do they affect the extruder?
A: Metering pumps do create some backpressure, but they are active conveying devices, not resistance elements. With proper sizing, the pump inlet pressure remains stable, imposing no additional load on the extruder. Instead, they isolate screw fluctuations, making the extruder operate more smoothly.
Q: Do metering pumps need separate heating? How is temperature controlled?
A: Yes. The pump bodies have independent heaters, and temperature is controlled in coordination with the extruder die head temperature to prevent melt from cooling and solidifying inside the pump. Control accuracy is also ±1°C.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2012
Total Annual:
5000000-8000000
Employee Number:
50~60
Ecer Certification:
Verified Supplier
Jiaxing Chuanqi Machinery Equipment Co., Ltd. is a high-tech enterprise that specializied in the research and develop and manufacture of Paper strap production line, PP box strap production line and all kinds of automatic winder and PP PET strapping.
Vision: Committed to becoming t... Jiaxing Chuanqi Machinery Equipment Co., Ltd. is a high-tech enterprise that specializied in the research and develop and manufacture of Paper strap production line, PP box strap production line and all kinds of automatic winder and PP PET strapping.
Vision: Committed to becoming t...