In the production process of recycled plastic pelletization, raw material sources are complex and composition varies significantly, often resulting in unstable melt viscosity, pressure, and flow characteristics. Relying solely on an extruder for plasticization and conveying can easily lead to issues such as fluctuating output, unstable pressure, inconsistent pellet size, and unstable production rates. In such cases, the role of Ruicheng Pump Industry’s RC series melt pumps extends beyond simple “material conveyance”; they play a critical role in stabilizing pressure, metering, enhancing efficiency, and improving quality across the entire pelletizing production line.
Melt pumps are typically installed between the extruder and the die head or screen changer. Utilizing a positive displacement gear conveying principle, they generate a stable, continuous melt output through gear meshing. It effectively mitigates the impact of extruder screw speed fluctuations, changes in material density, and variations in filtration resistance on downstream output, ensuring the melt enters the pelletizing stage in a more uniform and stable state. For materials like recycled plastics—which are prone to fluctuations in impurity content, melt state, and flowability—the melt pump helps the system maintain more stable pressure and flow rates.
In practical applications, melt pumps improve die pressure stability, reducing issues such as strand breakage, uneven thickness, and inconsistent pellet size, thereby enhancing the appearance quality and batch consistency of recycled pellets. Additionally, by assuming part of the pressure-boosting function, the extruder can focus more on plasticization and mixing, reducing the pressure load on the screw tip. This improves equipment operating conditions to a certain extent and enhances production continuity.
These products are widely applicable in production lines for rubber, thermoplastics, sheet materials, pipes, profiles, films, and pelletizing, and are suitable for PP, PE, PVC, PET, PA, TPU, EVA, ABS, PS, rubber, and various high-viscosity polymers. Depending on the specific material properties and process requirements, melt pumps can achieve stable conveyance under high-temperature, high-viscosity, and high-pressure conditions, providing reliable support for continuous production.
Additionally, melt pumps offer excellent metering capabilities. By adjusting the pump speed, melt output can be controlled with greater precision, making the pelletizing process more manageable and allowing enterprises to easily adjust processes based on different recycled materials and output requirements. For manufacturers seeking stable production capacity, reduced scrap rates, and increased value-added benefits from recycled materials, installing a melt pump is a critical configuration for achieving stable and precise operation of recycled plastic pelletizing production lines.
Tianjin Ruicheng Pump Industry has long focused on application scenarios such as plastic extrusion, modified pelletizing, and recycled plastic pelletizing. Based on customers’ material properties, production requirements, temperature and pressure conditions, and on-site installation space, we provide tailored melt pump selection solutions to help production lines achieve stable conveying, precise metering, and continuous, efficient operation.
