Melt pump features and functions
Melt pumps feature a unique volumetric design that is suitable for conveying, pressurizing, and metering high-temperature, high-viscosity polymer melts without the effects of changes in pressure, temperature, and viscosity. The pump provides pressure between the extruder and die and matches the extruder parameters to provide a uniform melt with increased output and tight tolerances. Generally installed in the extruder between the export and the nose, in the granulation, film, pipe, sheet, sheet and other polymer extrusion molding is widely used, can also be installed in the pipeline used to transport high viscosity pure material . Haike MP-S, MP-M and MP-H series of gear pumps are made of high temperature alloy steel and powder alloy steel for the material. After quenching, tempering, tempering, nitriding, carburizing, carbonitriding, polishing and other series of hot working and surface treatment, the product possesses characteristics of high temperature resistance, high pressure, high wear resistance and corrosion resistance. Product hardness up to 62-68HRC, can greatly satisfy the customer requirements for different conditions. The role of melt pump Melt pump is a positive displacement conveyor equipment, high-precision gear clearance and volumetric structure design, so that a stable and balanced extrusion possible, in the chemical fiber, granulation, plastic film, sheet, It has been widely used in production lines such as profile, pipe, wire and cable, drawing and compound extrusion, and has achieved good results. 1. It can achieve stable extrusion, improve the dimensional accuracy of extruded products and reduce the rejection rate. In the extrusion process, the uneven feeding of materials, barrel and head temperature fluctuations, pulsating speed and other phenomena is difficult to avoid. The use of melt gear pump can eliminate feeding system feeding error, can greatly reduce the upstream process of transmission fluctuations, rapid access to stable working conditions, improve the dimensional accuracy of extruded products, reduce scrap rate. 2. To increase production, reduce energy consumption, low temperature extrusion, extend the life of the machine. Since the extruder is equipped with a polymer melt pump, the decompression function of the extruder is transferred to the gear pump, and the extruder can work under the condition of low pressure and low temperature, the leakage flow is greatly reduced, and the output is increased. Gear pumps create head pressure more effectively than extruders and reduce backpressure on the extruder, allowing the screw to withstand the axial forces and prolonging service life. 3. With linear extrusion characteristics, to facilitate the coordination of downstream equipment. As the gear pump leakage less, the pump capacity and speed of the basic linear relationship between the gear pump speed changes, the flow can know exactly, because it can determine the upstream and downstream equipment and gear pump synchronization work speed, the use of gear pump Entrance and exit of the collection of pressure, temperature and other information to achieve the entire extrusion process online monitoring and feedback control.
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