Application of Bidirectional Pulling Film Melt Gear Pump

The bidirectional stretch film melt gear pump has extensive applications in the plastics processing industry, particularly during the production process of biaxially oriented polypropylene (BOPP) films. The following is a detailed elaboration on its applications:

I. Application Background

Biaxially oriented films are high-performance films widely used in packaging, printing, electronics, construction, and other fields. Their production process demands exceptional stability, uniformity, and precision in melt delivery. As a crucial component in this process, the melt gear pump plays a pivotal role.

II. Primary Functions

Stable Melt Delivery: The melt gear pump employs a unique volumetric design that ensures stability and uniformity in the delivery of high-temperature molten materials. It transports the molten materials to the mold with consistent pressure and flow rate, thereby guaranteeing the quality of film formation.

Enhanced Production Efficiency: By precisely controlling the amount and pressure of melt delivery, the melt gear pump significantly boosts the overall efficiency of the production line. It minimizes downtime and waste caused by melt instability, reducing production costs.

Improved Product Quality: The melt gear pump achieves nearly linear flow output, resulting in more uniform film thickness. Additionally, it reduces extruder load, conserves energy and costs, and further enhances product market competitiveness.

III. Application Areas

Film Production: The bidirectional stretch film melt gear pump is a core equipment in BOPP film production lines. It meets the requirements of high temperature, high pressure, and high viscosity conditions, ensuring stability and efficiency in the film production process.

Pipe Extrusion: During pipe extrusion, the melt gear pump also plays a significant role. It stably conveys molten materials to the mold, ensuring uniform wall thickness and precise dimensions of pipes.

Other Polymer Extrusion Molding: Apart from films and pipes, the melt gear pump can be applied to the extrusion molding of plates, sheets, and other polymer materials. It accommodates various types and specifications of polymer materials, fulfilling diverse production needs.

IV. Technical Characteristics

Minimal Pressure and Flow Pulsation: The melt gear pump achieves linear flow output, making it suitable for precision extrusion systems.

High-Temperature, High-Pressure, and High-Viscosity Adaptability: It can operate in harsh conditions of high temperature (up to 350°C), high pressure (up to 40MPa), and high viscosity (up to 40,000Pa•s).

Precise Structure and Long Lifespan: The melt gear pump boasts high structural precision and a long lifespan, ensuring stable operation over extended periods.

In conclusion, the bidirectional stretch film melt gear pump holds vast application prospects and significant value in the extrusion molding processes of biaxially oriented films and other polymers. As the plastics processing industry continues to evolve and advance technologically, the performance and quality of melt gear pumps will also improve and refine continually.

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