Advantages of Melt Pump in Extrusion Sheet Production
In the production of extruded sheets, the melt pump can accurately control the flow rate of the melt. It can allow the melt to enter the mold at a stable and uniform speed, ensuring consistent thickness and height of the sheet. For example, when producing insulation sheets for electronic devices with strict thickness requirements, the melt pump can control the flow error within a very small range, effectively improving product quality.
The melt pump can stabilize the pressure during the extrusion process. During the sheet extrusion process, unstable pressure may cause defects such as wavy and uneven thickness in the sheet. The melt pump, through its own working principle, can buffer the pressure fluctuations generated by the upstream extruder, ensuring stable pressure at the entrance of the mold and making the surface of the sheet smooth and reliable in quality.
Due to the precise control of flow rate and pressure by the melt pump, the produced sheets have better consistency in size accuracy, physical properties, and other aspects. Both mechanical performance and appearance quality can be effectively improved. For example, in the production of acrylic (PMMA) sheets for advertising display, the melt pump ensures the stability of the sheet quality, keeping its transparency, hardness and other properties consistent.
The melt pump can operate at lower screw speeds, thereby reducing the energy consumption of the extruder. It can achieve stable transportation of the melt at lower pressures, reducing the energy consumption of the extruder due to high-pressure extrusion. At the same time, efficient conveying also improves the efficiency of the entire production process, for example, in the continuous production of PET sheets, it can increase the output per unit time.
The melt pump has good adaptability to melts of different viscosities. Both high viscosity engineering plastics and low viscosity general-purpose plastics can be effectively transported through melt pumps. Moreover, it can be used in conjunction with different extrusion processes, such as multi-layer co extrusion, to produce multi-layer composite sheets and meet diverse production needs.
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