BOPP film extrusion melt pump

The BOPP film extrusion melt pump is a specialized melt pump designed for the production technology of high-performance films, namely biaxially oriented polypropylene (BOPP) films. Below is a detailed introduction to the BOPP film extrusion melt pump:

I. Main Functions and Applications

The BOPP film extrusion melt pump is primarily used for the conveyance, pressurization, and metering of high-temperature, high-viscosity polymer melts. In BOPP film production lines, it can stably pressurize and stabilize the high-temperature plastic melt from the extruder and deliver it with a stable flow rate to the extruder die, thereby ensuring the continuity and stability of the film extrusion process. Additionally, it is widely applied in the extrusion molding of plastics, resins, and rubber products, such as granulation, pipe, sheet, and plate industries.

II. Technical Characteristics

Minimal Pressure and Flow Pulsation: The BOPP film extrusion melt pump exhibits minimal pressure and flow pulsation, enabling linear flow output and suitability for precision extrusion systems.

High-Precision Metering: Its ability to stabilize melt pressure and flow rate surpasses various types of extruders, ensuring that the dimensional tolerances of extruded products are minimized.

High-Temperature and High-Viscosity Adaptability: The pump body is manufactured from high-quality materials such as high-temperature alloy steel, capable of enduring the conveyance requirements of high-temperature, high-viscosity melts.

Multiple Configuration Options: Based on customer needs, melt pumps with various heating methods (e.g., electric heating, heat medium heating), viscosity ranges, and temperature ranges can be provided.

III. Advantages and Benefits

Increased Extrusion Output and Quality: By stabilizing melt pressure and flow rate, the BOPP film extrusion melt pump can significantly enhance extrusion output and product quality.

Reduced Energy Consumption: Combining a co-rotating twin-screw extruder with a melt pump to form a mixing and extrusion granulation production line significantly improves mixing quality and output compared to standalone twin-screw granulation units, typically reducing energy consumption per kilogram of material by approximately 25%.

Simplified Production Process: Installing a melt pump and extruder dies for pipes, sheets, films, etc., on single-screw or co-rotating twin-screw granulation extruders eliminates the granulation step and directly extrudes products, thereby simplifying the production process and shortening the production cycle.

Flexible Configuration: Multiple small-to-medium-sized extruders can simultaneously feed into one melt pump, and the melt is pressurized and metered by the melt pump before being supplied to the die for extruding large products (e.g., large-diameter pipes, wide sheets, films, etc.). This configuration results in a compact production line with a small footprint.

IV. Operation and Maintenance

When using the BOPP film extrusion melt pump, certain operating procedures and maintenance standards must be followed. For instance, before startup, it is necessary to check whether the pump's model and specifications meet the usage requirements, whether the transmission system is normal, and whether the inlet and outlet pipelines are clean and unobstructed. During operation, the pump's flow rate and pressure fluctuations should be monitored, adjusted in a timely manner, and regular inspections of the pump's seals and bearing wear should be conducted, with timely replacements as needed.

In BOPP film production lines, the application of melt pumps has achieved remarkable results. For example, after adopting a melt pump, one enterprise significantly improved film extrusion quality, effectively controlled dimensional tolerances, and optimized production efficiency and energy consumption.

In conclusion, the BOPP film extrusion melt pump plays a crucial role in BOPP film production lines, significantly enhancing extrusion output and quality, reducing energy consumption, and simplifying the production process. During operation and maintenance, certain norms and standards must be adhered to ensure its long-term stable operation.

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