Pipe extrusion melt pump
The polymer melt pump for tube extrusion is a crucial device in tube extrusion production lines. Below is a detailed introduction to the melt pump for tube extrusion:
I. Main Functions
The melt pump for tube extrusion is primarily used for the conveyance, pressurization, and metering of high-temperature, high-viscosity polymer melts. Its main function is to pressurize and stabilize the high-temperature melt from the extruder, while maintaining a precise and stable flow of the melt into the extruder head to ensure the quality and dimensional accuracy of the tubing.
II. Key Characteristics
Pressurization and Pressure Stabilization: The melt pump can further pressurize the high-temperature melt to ensure it enters the extruder head with sufficient pressure. Simultaneously, its gear structure effectively isolates fluctuations in melt pressure and flow rate, maintaining a stable melt pressure and flow rate into the extruder head.
Pressure Fluctuation Control: The melt pump continuously and smoothly compresses the material through the continuous meshing of its teeth, effectively eliminating pressure fluctuations and ensuring a smooth flow of the melt.
Increased Extrusion Output: The melt pump shares the pressure-generating work of the extruder, reducing the pressure requirements for the screw, enabling it to extrude material at high speeds and efficiencies. Additionally, the stable conveying action of the melt pump can regulate the back pressure of the extruder, reducing the residence time of the melt in the screw barrel, thereby increasing extrusion output.
Reduced Energy Consumption: The melt pump optimizes the extrusion process, reducing energy waste caused by pressure and flow rate fluctuations, lowering the energy consumption of the entire tube extrusion production line.
Easy Monitoring and Control: The conveying capacity of the melt pump is basically linearly related to its rotational speed. By monitoring and controlling the rotational speed of the melt pump, the flow rate of the melt can be accurately determined. Furthermore, using pressure, temperature, and other information collected at the inlet and outlet of the melt pump, full online monitoring and feedback control of the entire extrusion process can be achieved.
III. Application Scope
The melt pump for tube extrusion has been widely used in the extrusion molding process of polymers such as plastics, resins, and rubbers, especially in production lines for tubing, wire and cable, and composite extrusion, achieving remarkable results. The materials that can be processed cover almost all polymer materials, such as PE, PC, PP, PVC, HIPS, PS, PA, TPUR, and more.
IV. Selection Recommendations
When selecting a melt pump for tube extrusion, the following factors should be considered:
Working Pressure and Flow Rate: Choose a melt pump with appropriate working pressure and flow rate based on the specific requirements of the extrusion process.
Temperature Range: Ensure that the selected melt pump can withstand the maximum temperature of the melt during the extrusion process.
Material Compatibility: Select a melt pump material that is compatible with the extruded material to avoid degradation or contamination of the material within the pump.
Control System: Choose a melt pump equipped with an advanced control system to achieve precise monitoring and adjustment of the extrusion process.
In summary, the melt pump for tube extrusion plays a vital role in tube extrusion production lines. Through its functions of pressurization, pressure stabilization, and pressure fluctuation control, it significantly improves the quality and output of tubing, reduces energy consumption, and facilitates the monitoring and control of the production process.
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