Plastic HDPE PP bar extrusion line for 25mm

Below is a detailed analysis of the melt pump used in the extrusion line for 25MM HDPE and PP plastic rod materials:

I. Basic Overview of the Melt Pump

A melt pump is a power transmission device used for conveying high-temperature, high-viscosity polymer melts. It is primarily used for conveying, pressurizing, and metering high-temperature, high-viscosity polymer melts. It has a wide range of applications in the extrusion molding of plastics, resins, and rubber products, such as granulation, film production, pipe production, sheet production, and plate production.

II. The Role of the Melt Pump in the Extrusion Line

Pressurization and Pressure Stabilization: The melt pump can pressurize and stabilize the high-temperature plastic melt from the extruder, ensuring that the melt flow is precisely and stably fed into the extruder die.

Improved Production Efficiency: When the melt pump is used in series with a single-screw or co-rotating twin-screw extruder, it can significantly enhance the overall efficiency of the entire production line.

Optimized Product Quality: The melt pump can reduce the dimensional tolerance of extruded products, improving product precision and quality.

III. Selection of the Melt Pump for the Extrusion Line for 25MM HDPE and PP Plastic Rod Materials

Pump Type: Based on the specific requirements of the production line, select the appropriate type of melt pump, such as straight-tooth, helical-tooth, or herringbone-tooth.

Pump Specifications: Considering that the diameter of the extruded product is 25MM, it is necessary to choose a melt pump that matches this specification to ensure that the melt conveyance volume, pressure, and stability meet production requirements.

Pump Material: Since the melt pump needs to contact high-temperature, high-viscosity polymer melts, the pump material must have good high-temperature resistance, wear resistance, and corrosion resistance.

Pump Control System: Choosing a melt pump with an advanced control system allows for precise control and monitoring of the melt conveyance process, improving the automation and stability of the production line.

IV. Operation and Maintenance of the Melt Pump

Operating Precautions: When installing and operating the melt pump, it is necessary to follow relevant operating procedures and safety regulations to ensure the normal operation of the pump and the safety of personnel.

Maintenance: Regularly maintain the melt pump, including cleaning, lubrication, and inspection, to extend its service life and improve its working efficiency.

V. Case Study

Taking the HDPE pipe extrusion line as an example, after installing the melt pump, the stability and efficiency of the production line can be significantly improved. Specifically, the melt pressure is stable, the flow rate is precisely controllable, the dimensional tolerance of the extruded products is reduced, and the product quality is improved. Additionally, the melt pump can reduce the backpressure of the extruder, decrease the axial force borne by the screw, and extend the service life of the extruder.

In summary, selecting the appropriate melt pump for the extrusion line for 25MM HDPE and PP plastic rod materials is crucial. In the selection and use process, it is necessary to fully consider factors such as the specific requirements of the production line, pump specifications, and material, and follow relevant operating procedures and safety regulations to ensure the stability and efficiency of the production line.

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