POY spinning tester

POY spinning testing machine is a kind of equipment used to simulate and test the production process of polyethylene terephthalate pre-oriented yarn (POY for short). The following information is related to it:

Main components and functions:

Extruder: polymer chips (such as polyester chips) are heated, melted and extruded to provide continuous melt for spinning. Its heating temperature, extrusion speed and other parameters have important influence on spinning quality.

Metering pump transmission system: accurately measure and convey the melt to the spinning assembly to ensure the stable and accurate flow of the melt, which is very important for the fiber size uniformity.

Spinning seat: the melt forms filaments in the spinning seat through the spinneret, and the diameter, number and shape of the spinneret determine the fineness and shape of the fibers.

Side blowing system: cooling the silk extruded from the spinneret, so that the melt can quickly solidify into silk. The temperature, wind speed and wind direction of cooling air need to be accurately controlled to ensure the proper crystallinity and orientation of fibers.

Oiling system: oil the tow to increase the lubricity and cohesion of the fiber, which is convenient for subsequent processing and winding, and can also reduce the generation of static electricity.

Guide wire reel: it guides the tow to run in a certain direction and path, plays the role of sorting and guiding the tow, and ensures the smooth transmission of the tow.

Winding machine: the spun tow is wound into a tube, and the winding speed, winding tension and other parameters have an important influence on the forming quality and subsequent performance of the tube.

Control cabinet: As the control center of the equipment, it integrates the functions of temperature control, speed adjustment and pressure control, and the operator can monitor and adjust the whole spinning process through the control cabinet.

Technical parameters:

Spinning speed: Generally speaking, the spinning speed of POY spinning tester can be between several hundred meters/minute and several kilometers/minute, and the common speed range is 1000-4000 meters/minute. For example, some small testing machines may spin at a speed of 1,000-2,000 m/min, while large, more advanced testing machines can reach 3,000-4,000 m/min or even higher.

Size range: The size range of fiber that can be produced is also an important parameter. Usually, the POY size that can be produced is between tens of denier and hundreds of denier, such as the common 50-300dtex (denier).

Temperature control accuracy: the temperature control accuracy of extruder, spinning box and other parts is required to be high, and the general temperature control accuracy is between 1-5℃ to ensure the temperature stability of melt and thus ensure the spinning quality.

Pressure control: The pressure control accuracy of metering pump is also a key parameter. Usually, the pressure control accuracy is between 0.1 MPa and 0.5 MPa, which ensures the output pressure of the melt to be stable and the fiber size to be uniform.

Features:

Integrated design: Some POY spinning testing machines adopt integrated design, and all components are integrated into one frame, which has the advantages of small floor space, convenient transportation, convenient installation, and simple operation, and can be used by connecting power supply and gas source on site.

Precise control: It has precise control functions of temperature, speed, pressure and other parameters, which can meet the requirements of scientific research and small batch production for precise control of spinning process parameters.

High flexibility: the spinneret can be changed and the process parameters can be adjusted according to different experimental requirements, which is suitable for spinning experiments of various polymer materials and the development and research of new products.

Data recording and analysis: Some advanced testing machines are equipped with data recording systems, which can record various parameters in the spinning process in real time, which is convenient for operators to conduct data analysis and process optimization.