The melt metering pump in the flat filament drawing machine is the core equipment in plastic flat filament production. Flow rate is strictly proportional to pump speed. By adjusting the speed, melt flow can be precisely controlled with minimal error, ensuring uniform filament diameter and stable quality.
It provides continuous, stable pressure to the melt, preventing uneven filament thickness, breakage, or surface defects (such as bubbles or burrs) caused by pressure fluctuations.
When drawing speed, temperature, or melt viscosity changes, the metering pump dynamically adjusts flow and pressure in real time to accommodate varying production requirements (e.g., switching product specifications or materials).
By stabilizing melt flow and pressure, it reduces breakage rates (by 30%-50%) and increases yield (by 5%-10%), significantly lowering scrap costs.
Application Advantages
Enhanced Flat Filament Uniformity
Ensures filament diameter deviation <±1% and surface smoothness of Ra≤0.8μm, meeting strength requirements for high-end packaging, agricultural mulch films, and similar applications.
Improved Production Efficiency
Integration with filament drawing machine control systems enables remote monitoring and automatic parameter adjustment, reducing manual intervention and boosting production efficiency by 15%-20%.
Reduced Energy Consumption and Costs
Stable operation minimizes idle time and frequent starts/stops, cutting energy consumption by 10%-15%. Simultaneously reduces material waste (scrap caused by wire breaks or thickness inconsistencies).
Enhanced Process Adaptability
Capable of processing diverse plastic materials (e.g., PP, PE, PET) across varying melt viscosities (100-5000 Pa·s) and temperature ranges (180-300°C).
Selection Recommendations
Flow and Pressure Matching
The rated flow should slightly exceed maximum production requirements (allowing a 10%-15% margin), while pressure must meet process demands (e.g., maximum wire drawing machine pressure plus a 20% safety factor).
Material Compatibility
High-temperature materials (e.g., PET) require high-temperature-resistant gears (e.g., alloy steel) and pump bodies (e.g., stainless steel); corrosive materials (e.g., PVC) necessitate anti-corrosion coatings.
Temperature Control Capability
Equip with precise temperature control systems (e.g., PID control) to ensure melt temperature fluctuations remain within ±2°C, preventing brittleness or deformation of flat filaments due to uneven heating.
Brand Reputation and Reliability
Select reputable brands (e.g., Zhengzhou Batte, German MAAG) and experienced suppliers to guarantee equipment stability and reliable after-sales service.
The melt pump in the flat yarn drawing machine significantly enhances flat yarn quality and production efficiency by precisely controlling melt flow and pressure, serving as the “heart” of plastic flat yarn production lines. Proper selection, standardized operation, and regular maintenance maximize its value, enabling enterprises to achieve efficient, stable, and low-cost production.
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