How to choose POY spinning testing machine suitable for your own needs?
Choosing POY spinning testing machine suitable for your own needs needs to be considered from many aspects. The following are some suggestions:
Identify experimental or production requirements:
Fiber types and performance objectives:
Determine the fiber types to be spun, such as PP, PA, PET, PLA, etc. Different materials require different parameters such as temperature control and extrusion pressure. For example, the melting point of PET material is relatively high, which requires the testing machine to have good heating and temperature control capabilities; However, the viscosity of PA material is high, which requires higher pressure of extruder.
According to the required fiber performance indicators, such as denier, strength, elongation, etc., choose a testing machine that can meet these requirements. For example, if it is necessary to produce high-strength POY fiber, the testing machine should have accurate drafting and winding control functions to ensure the orientation and crystallinity of the fiber.
Production scale and test frequency:
If it is used for scientific research or small-scale experiments, a small testing machine can be selected, which has the advantages of small floor space, flexible operation and relatively low cost. For example, some POY spinning testing machines used in the laboratory have a small amount of spinning each time, but they can meet the researchers' exploration and research on different process parameters.
If it is used in pilot or small-scale production, it is necessary to choose a testing machine with moderate production capacity, which can improve the production efficiency while ensuring the test effect. For example, some medium-sized testing machines can spin several kilograms to dozens of kilograms per hour, which is suitable for pilot production of enterprises.
If it is mass production, it is necessary to choose a large-scale testing machine with high degree of automation, which can meet the demand of high output and has stable performance and reliable quality.
Inspect the equipment performance parameters:
Spinning speed: Spinning speed is one of the important parameters of POY spinning testing machine, which directly affects the production efficiency and quality of fiber. Generally speaking, the higher the spinning speed, the higher the production efficiency, but the higher the requirements for equipment. Choose the appropriate spinning speed according to your own needs. For example, for some applications that require high fiber quality, you may need to choose a lower spinning speed to ensure fiber uniformity and stability. For some applications that require high production efficiency, higher spinning speed can be selected.
Temperature control accuracy: temperature has an important influence on the forming and properties of POY fiber, so the temperature control accuracy of the testing machine is very important. Generally, the temperature control accuracy is required to be within 1-5℃. The higher the temperature control accuracy, the more stable the fiber quality can be. At the same time, we should also pay attention to the heating mode and uniformity of the testing machine to ensure the uniform temperature of the melt during the whole spinning process.
Pressure control: the pressure control accuracy of metering pump directly affects the fiber size uniformity. The higher the pressure control accuracy, the smaller the fiber size deviation. Generally, the pressure control accuracy is required to be between 0.1 MPa and 0.5 MPa. In addition, we should also consider whether the extrusion pressure range of the extruder can meet the spinning needs of different materials.
Draft ratio and winding tension: Draft ratio and winding tension have an important influence on the orientation and crystallinity of fibers, thus affecting the properties of fibers. When selecting the testing machine, make sure that it has the functions of adjustable drafting ratio and winding tension, and can be accurately controlled. For example, for some fibers that need high degree of orientation, it is necessary to choose a testing machine with large draft ratio and stable winding tension.
Pay attention to the structure and function design of equipment;
Extrusion system: Extrusion system is one of the core components of testing machine, and its performance directly affects the quality of fiber. It is necessary to choose a testing machine with excellent extruder screw material, good wear resistance and high extrusion efficiency. At the same time, we should also pay attention to the heating mode, temperature control system and connection mode with metering pump of extruder to ensure stable and uniform melt transportation.
Spinneret: The diameter, number and shape of spinneret determine the fineness and shape of fiber. When choosing a testing machine, make sure that the spinneret equipped with it can meet your own needs and is easy to replace and clean. In addition, we should pay attention to the material and processing accuracy of spinneret to ensure the forming quality of fiber.
Cooling system: The function of the cooling system is to make the melt quickly solidify into filaments, and its cooling effect directly affects the structure and properties of fibers. A testing machine with adjustable cooling air temperature, wind speed and wind direction should be selected to meet the cooling requirements of different materials. At the same time, we should also pay attention to the stability and uniformity of the cooling system to ensure the consistent cooling effect of the fiber.
Oiling system: the oiling system can increase the lubricity and cohesion of the fiber, which is convenient for subsequent processing and use. When selecting the testing machine, it is necessary to ensure that the oiling system can oil the tow evenly, and the addition amount of oil agent can be accurately controlled.
Winding system: The function of the winding system is to wind the spun tow into a cylinder, and its performance directly affects the winding quality and subsequent use performance of the fiber. A testing machine with adjustable winding speed and stable winding tension should be selected, and the structure of the winding system should be reasonable and convenient for operation and maintenance.
Considering the reliability and maintainability of the equipment:
Reliability of equipment: Choose testing machines produced by manufacturers with good reputation and brand reputation to ensure reliable quality and stable performance of equipment. You can know the reliability of the equipment by consulting the manufacturer's qualification certificate and customer evaluation.
Maintainability of equipment: Maintenance of equipment is very important for prolonging its service life and ensuring its stable performance. Choose a testing machine with simple structure and easy disassembly and cleaning, which is convenient for daily maintenance. At the same time, we should also pay attention to the after-sales service quality of manufacturers to ensure that equipment can be repaired and supported in time when it fails.
Budget constraints:
Determine the price range of the testing machine according to your own budget, and choose the equipment with high cost performance on the premise of meeting the demand. Don't just pursue low prices and ignore the performance and quality of equipment; Don't blindly pursue high-priced equipment, causing unnecessary waste. You can choose the most suitable testing machine by comparing the product quotations and performance parameters of different manufacturers.
