The outlet pressure of the PVC pipe production line is affected by various factors, affecting the dimensional accuracy of the product. Here we take a brief look at how to improve the accuracy of your product.
Increase output, reduce energy consumption, achieve low-temperature extrusion, and extend the service life of the machine. Since the polymer melt pump is installed in the PVC pipe production line, the pressure reduction function of the PVC pipe production line is transferred to the gear pump. The PVC pipe production line can work at low pressure and low temperature. Leakage flow is greatly reduced and output is increased. The gear pump is easier to set the head pressure than the PVC pipe production line, which can reduce the back pressure of the PVC pipe production line, reduce the axial force on the screw, and extend the service life.
The PVC pipe production line achieves stable extrusion, improves the dimensional accuracy of extruded products, and reduces the scrap rate. During the extrusion process, material inhomogeneity, cylinder and cylinder head temperature fluctuations, and screw speed pulsations are inevitable. The use of a melt gear pump can eliminate the feeding error of the feeding system, greatly reduce the fluctuation of the upstream transmission, quickly stabilize the working state, improve the dimensional accuracy of extruded products, and reduce the scrap rate.
The PVC pipe production line has linear extrusion characteristics, which facilitates the collaborative work of upstream and downstream equipment. Since the leakage flow of the gear pump is small, the transmission capacity of the pump is basically linearly related to the rotation speed. When the speed of the gear pump changes, its flow rate can be accurately known. Since the synchronous working speed of the upstream and downstream equipment and the gear pump can be determined, the pressure and temperature information collected at the inlet and outlet of the gear pump can be used to realize the entire process. Online monitoring and feedback control of the extrusion process.