The operating principle of polyester staple fiber equipment mainly involves the transportation process of polyester melt from the melt booster pump to the spinning box. First, the melt booster pump pressurizes the melt delivered from the pipeline of the polyester device, and then delivers it to the spinning box through precise metering by the metering pump. This process is mainly realized by the melt booster pump. The melt booster pump is a positive displacement conveying device, and its flow rate is strictly proportional to the pump speed.
In the process of delivering the melt, the melt booster pump is not only used to increase the melt delivery pressure to meet the inlet pressure of the spinning assembly which must be higher than 10 MPa, but also to ensure the pressure stability of the melt delivery system. This is because during the chemical fiber spinning process, the inlet pressure of the spinning assembly must remain stable, otherwise the quality and performance of the fiber will be affected.
Another important feature of a melt booster pump is that it needs to be resistant to high temperatures and corrosion. Since the temperature of the polymer melt is usually very high, the pump body must be able to withstand high temperatures. At the same time, the pump body and parts also need to use corrosion-resistant materials such as high-temperature tool steel. In addition, the expansion coefficients of each mating part should not differ too much to ensure mating accuracy and sealing effect.
In the spinning box, the raw filaments extruded from the spinneret are cooled and wound to form the final short fibers. During this process, the shape, size and properties of the raw filaments are strictly controlled to obtain short fibers that meet the requirements.
In general, the operating principle of polyester staple fiber equipment is the process of making polyester melt into short fibers through the cooperative work of the melt booster pump and the spinning box. This process requires precise control of pressure, temperature, flow and other parameters to ensure product quality and performance.
