Uniform Product Quality & Stable Melt Flow from Dual Metering Pumps – PP Band Line
Price:
Negotiable
MOQ:
1SET
Delivery Time:
60DAYS
Brand:
CHUQI
Product Description
Dual Metering Pumps Ensuring Stable Melt Flow and Uniform Product Quality
Product Introduction
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. 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. 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.
Main Specifications
- Number of Metering Pumps: 2 units
- Displacement: 50cc
- Drive Method: 4 powered drives (dual or independent per pump)
- Motor Power: 3KW * 2 units
- Function: Pressure stabilization, flow stabilization, eliminating extrusion pulsation
- Installation Position: After extruder and screen changer, before die
Technical Parameters
| Item | Parameter / Description |
|---|---|
| Number of 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 |
Customer Questions & Answers
Q: Why two metering pumps instead of one?
A: Two pumps in parallel or series 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.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Jiaxing Chuanqi Machinery Equipment Co., Ltd.
Location
Yucheng town, Haiyan County, Jiaxing City, Zhejiang Province, China
Contact Person
Alex