When used on high-speed knitting machines, what special properties does the thread bobbin need to have to ensure stability?
Publish Time: 2025-07-07
As the textile industry develops towards high efficiency and intelligence, the operating speed of knitting machines continues to increase. In this context, the performance of the thread bobbin, as one of the key auxiliary components, directly affects the stability of yarn delivery and the quality of the finished fabric. Especially in high-speed knitting equipment, the thread bobbin must not only withstand frequent rotation and friction, but also maintain constant tension control and smooth yarn output. Therefore, it must have a series of special properties to meet the high-demand working environment.
High strength and wear resistance
In high-speed knitting machines, the thread bobbin usually rotates thousands or even tens of thousands of times per minute. Long-term high-speed operation will cause temperature rise and aggravate material wear. Therefore, the thread bobbin must be made of high-strength and wear-resistant materials, such as high-quality engineering plastics, carbon fiber composite materials or surface-treated metal materials. These materials can not only effectively resist the loss caused by mechanical friction, but also maintain structural stability in high temperature environments, thereby extending service life and reducing replacement frequency.
Precision machining and dynamic balancing design
Under high-speed rotation, if the thread bobbin has uneven mass distribution or geometric errors, it is very easy to cause vibration and noise, which in turn affects the operating stability of the entire equipment. To this end, modern high-performance thread bobbin adopts precision machining technology in the manufacturing process and optimizes the design through dynamic balancing test to ensure that it can still maintain stable operation at high speed. This dynamic balancing technology can not only reduce machine vibration, but also reduce the impact on the spindle bearing, and improve the overall operating efficiency and safety of the equipment.
Heat resistance and deformation resistance
The heat generated by high-speed operation will cause the local temperature of the thread bobbin to rise rapidly. If the material does not have good heat resistance, it is easy to soften, deform or even break. Therefore, thread bobbin used for high-speed knitting machines usually uses materials with excellent heat resistance, such as special engineering plastics such as high-temperature nylon and polyimide (PI), or heat-treated aluminum alloys. These materials can maintain the original shape and dimensional accuracy under high temperature conditions, avoiding yarn path deviation or jamming caused by thermal expansion.
Antistatic and low friction coefficient
During high-speed operation, the yarn and thread bobbin are in frequent contact. If the friction coefficient of the thread bobbin surface is too large, it will not only increase energy consumption, but also may cause problems such as yarn fuzzing and breakage. In addition, static electricity accumulation may also absorb dust and affect the cleanliness of the yarn. Therefore, high-end thread bobbin products often use surface coatings or modified materials with low friction coefficients and antistatic functions, such as composite materials with added graphite or molybdenum disulfide, to improve the smoothness of yarn sliding and reduce static interference, to ensure the continuity of the production process and the consistency of product quality.
Yarn tension control ability
In addition to physical properties, thread bobbin must also have good yarn tension adjustment capabilities. In high-speed knitting operations, yarn tension fluctuations will directly lead to quality problems such as uneven fabric density and poor looping. Therefore, some advanced thread bobbin systems integrate adjustable tension devices or intelligent sensing modules, which can automatically adjust the yarn release force according to real-time feedback to ensure that the tension is always within the ideal range. This active control technology greatly improves the automation level of the equipment, and further improves production efficiency and product consistency.
In summary, in high-speed knitting machines, thread bobbin is not only a basic component for carrying yarn, but also an important link to ensure production stability and product quality. It needs to have high strength, wear resistance, high temperature resistance, good dynamic balance, low friction, anti-static and other properties to meet the harsh challenges in high-speed environments.
