Airflow spinning (rotor spinning) anti twist head (false twist disc) is a core vulnerable component that directly determines twisting efficiency, yarn strength, fuzz, breakage, and dryness. The selection core revolves around four dimensions: material, aperture, curved structure (enclosing angle/arc), model adaptation, yarn count/raw material/process matching, and is comprehensively selected based on the type of machine and spinning requirements.
1、 Basic function of anti twist head
The core two functions of the anti twist head (false twist disc) are:
Twist blocking: creates a twist trap, preventing the spinning cup from twisting back and transmitting upwards, locking in the twist at the peeling point;
False twist: Additional false twist is generated by the friction and winding of the yarn, which enhances the dynamic strength of the yarn tail, reduces breakage, and optimizes hairiness and slimness.
The strength of the false twist effect is equal to the friction coefficient multiplied by the yarn wrap angle multiplied by the contact diameter, and all selection parameters are based on this formula.
2、 Selection dimension: Material selection (friction performance, yarn quality)
The three mainstream materials directly determine the friction coefficient, feather, and applicable working conditions, and the on-site comparison data is complete.
1. Ceramic anti twist head (high ceramic/alumina ceramic)
Features: Smooth surface, moderate friction coefficient, high temperature resistance, no flower hanging, and not easy to accumulate dirt; High yarn strength, small CV, less fuzz, and smooth yarn body.
Advantages: Excellent comprehensive performance, universal; Long term use with stable dimensions and no wear or deformation.
Disadvantages: High price, high brittleness, easy to crack upon collision.
Applicable: combed cotton, high-quality fine to medium count yarn, high-speed spinning cup, pursuit of low fuzz, high strength, and stable production.
2. Metal chrome plated (stainless steel chrome plated) anti twist head
Features: High friction coefficient, average hardness, low cost; The surface is prone to scratches, cotton wax/short fibers, and dirt accumulation.
Advantages: Low price, good toughness, non fragile, and high cost-effectiveness in rough production of coarse yarn.
Disadvantages: After long-term use, there is significant friction fluctuation, excessive fuzz, slightly higher yarn defects, and poor strength stability.
Applicable: Coarse count yarn, recycled cotton, scraps, low-grade polyester cotton yarn, low-speed old models, low-cost mass production.
3. Hard alloy/tungsten carbide anti twist head
Features: High friction coefficient and hardness; Suitable for high tension, high wear and harsh working conditions.
Applicable: Coarse count large twist, synthetic fiber blending, high impurity raw materials, high-speed machine models.
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