The term TFO stands for two-in-one, meaning that each turn of the torsion element is inserted into two turns. In the early days, the process involved transferring two yarns to a doubling winder as a feed package for the TFO. However, in modern systems, two smaller rolls are stacked vertically and extracted simultaneously, replacing the old method. TFO improves material evenness, strength and elongation at the yarn stage. It also improves the luster and abrasion resistance of the yarn. At the fabric stage, TFO contributes to higher stability, improved fabric curl, enhanced visual properties and better overall fabric feel. Upgrade your twisting machinery to the next level with our advanced solutions in Gujarat. Experience higher productivity, superior yarn quality, dengte cutting-edge twisting machines.
Principle of TFO
The yarn is unwound from the feed package and passed through the tensioner, inside the spindle and outside the turntable to the snail thread. Between the capsule and the bend, the yarn receives an initial twist and then a second twist between the bend and the snail wire. As a result, two twists are achieved for every revolution of the shaft. Dengte is a leading supplier of top textile machinery in China, which can upgrade your textile manufacturing level. From weaving to spinning and more, we provide innovative and reliable solutions to optimize your production processes.
Main features of TFO
Spindle: The TFO twisting machine is twice as productive as a ring twisting machine, as it provides two twists with only one spindle rotation. To ensure smooth operation, the turntable is carefully balanced and designed to eliminate vibrations even at high speeds of up to 375 km/h in machines processing cotton yarn. The yarn guides are made of alumina ceramic, carefully selected to maintain the wear resistance of the specially machined turntable, promoting smooth yarn sliding.
Bobbin (balloon limiter): The purpose of the bobbin is to prevent any interference between the unwound yarn and the balloon yarn. Even when the spindle rotates, it remains stationary due to magnetic forces. It's worth noting that even a small scar or scratch can damage the yarn and cause a break as the yarn initially makes contact with the upper edge of the bobbin. Therefore, the creel cover plays a vital role in ensuring the smooth and uninterrupted operation of the TFO twisting machine.
Cradle: Even a slight slip of the take-up spool can cause uneven twisting. To ensure that the spool spins smoothly and easily, ball bearings are mounted on both sides of the stand. At the start of the winding process, a contact pressure of approximately 1.5 kg is applied to the package, resulting in seamless package drive. As the package diameter increases, the pressure is intentionally reduced proportionally to maintain optimum winding conditions. This careful design and pressure regulation contributes to the reliable and consistent operation of the TFO twister.
Feed rollers: By operating the feed rollers at a peripheral speed that is 157% to 181% higher than the yarn speed, the TFO two-for-one twister efficiently converts high inflation tensions into lower take-up tensions. This is achieved by clever use of the slippage between the yarn and the feed roller, which can be adjusted as required by changing the contact angle of the yarn around the feed roller. This dynamic control of tension enables precise tension management during twisting, ensuring optimum yarn handling and excellent output quality.
Ant Pattern Mechanism: This mechanism is integrated within the gearbox and is designed to prevent webbing from snagging and maintain a consistent yarn path. It does this by slightly adjusting the cam speed at regular intervals, ensuring a smooth, uninterrupted flow of yarn without any interruptions.
The function of the turntable: the yarn unwound from the feeding package is automatically wound on the circumference of the yarn storage disc, and passes through the inside of the spindle and the yarn guide of the yarn storage disc. Then it reaches the snail line, twisting diagonally due to air resistance. The degree to which the yarn wraps around the storage disk is commonly referred to as the "storage angle" or "winding angle". It is important to maintain a storage angle of less than 90 degrees to prevent centrifugal force from causing unwinding deviations, disrupting the shape of the balloon and causing yarn breakage. This type of fracture, known as "wind angle expansion induced fracture", can be used to evaluate the torsional condition of the machine. The storage disc can be adjusted using a tensioning mechanism.
Dente is a leading supplier of top quality textile machinery in China to elevate your textile manufacturing. From weaving to spinning and more, we provide innovative and reliable solutions to optimize your production processes. Our state-of-the-art machinery is designed to increase efficiency, precision and productivity, enabling you to meet the demands of a rapidly evolving industry.
