The application of melt pumps in plastic processing is very extensive, mainly involving the following aspects:
I. Plastic Extrusion Processing
Granulation: Melt pumps are used in the manufacturing process of plastic particles. Through pressure boosting, pressure stabilization, and metering functions, they ensure that the plastic melt is stably fed into the extrusion mold to form uniform particles.
Extrusion of Sheets (Plates, Films): In the extrusion processing of sheets, plates, and films, melt pumps can stabilize the flow rate and pressure of the melt, improving product dimensional accuracy and surface quality.
Extrusion of Tubes: Melt pumps are utilized in the extrusion processing of tubes, ensuring uniform wall thickness and stable dimensions of the tubes.
Film Blowing: In the film blowing process, melt pumps provide stable melt flow rate and pressure, contributing to the formation of uniform films.
II. Plastic Molding Processing
Melt pumps also play an important role in plastic molding processing, such as injection molding. They can provide high-pressure, stable melt flow, ensuring stable quality and high dimensional accuracy of injection-molded parts.
III. Optimization of Plastic Processing Production Lines
Compounding Extrusion Granulation Lines: Combining coaxial twin-screw extruders with melt pumps can significantly improve compounding quality and output while reducing energy consumption.
Simplification of Production Processes: Installing melt pumps and extrusion heads for tubes, sheets, films, etc., on single-screw or coaxial twin-screw granulating extruders can eliminate the granulation process, directly extruding products, shortening production cycles, and achieving energy savings.
Parallel Connection of Multiple Extruders: Multiple small-to-medium-sized extruders can simultaneously feed into one melt pump. The melt is pressurized and metered by the melt pump before being supplied to the extrusion head to produce large products (such as large-diameter tubes, wide sheets, films, etc.), making the production line compact, occupying less space, and allowing for more precise control of the cross-sectional dimensions of the extruded products.
IV. Other Applications
Melt pumps are also widely used in plastic processing fields such as artificial fibers, optical fibers, medical plastic catheters, as well as in the extrusion molding of resins, rubbers, and chemical fiber products.
V. Characteristics and Advantages of Melt Pumps
Stable Flow Rate: The gear structure of melt pumps can effectively isolate the influence of pressure fluctuations and flow rate fluctuations in the feed zone on the discharge zone, achieving stable flow rate delivery.
High Pressure: Melt pumps can generate high pressure, facilitating the transport of high-viscosity melts to the desired location.
Precise Control: By adjusting the rotational speed of the melt pump, precise flow rate control can be achieved, meeting the production demands for high-quality products.
High Efficiency: Melt pumps can produce high flow rates at lower rotational speeds, improving energy efficiency and production efficiency.
In summary, melt pumps have extensive applications and significant advantages in plastic processing, making them indispensable important equipment in the plastic processing industry.
