The production process of the new rotor spinning machine involves multiple links and key parameters. The following is a detailed introduction to its production process:
1、 Raw material preparation
Raw cotton selection: New rotary spinning machines usually use low-grade cotton and recycled cotton as raw materials, which contain a lot of short fibers and impurities, so they need to be finely processed.
Raw material ratio: Based on product requirements and production processes, reasonably ratio different types and qualities of raw cotton to ensure the stability and consistency of yarn quality.
2、 Clear cotton and mixed cotton
Cotton cleaning: By using an efficient cotton cleaning unit to clean the raw cotton, impurities and short fibers are removed, improving the purity and quality of the fibers.
Cotton blending: Mix the cleaned raw cotton to ensure uniform fiber distribution and stability during the spinning process.
3、 Cotton combing and drawing
Combing: Using a high-yield carding machine to comb the mixed fibers, further removing impurities and short fibers, while arranging the fibers in parallel to improve their spinnability.
Drawing: Two drawing machines are used to merge and stretch the combed fibers, further improving the uniformity and quality of the fibers.
4、 Rotary spinning
Rotor design: The rotor of new rotor spinning machines is usually designed with a large diameter to increase coagulation and twisting effects. At the same time, the groove shape of the rotor has also been optimized, such as T-shaped, Z-shaped, etc., to facilitate fiber aggregation and yarn formation.
Selection of false twist disc: False twist disc is an important component of rotor spinning machine, and its diameter, material, manufacturing process, and smoothness have a significant impact on the quality of yarn. Usually, false twisting discs with small curvature radius, ceramic material, grooves or spiral shapes are selected to improve twisting efficiency and yarn quality.
Spinning speed: The new rotor spinning machine has a higher spinning speed, but in order to ensure the quality and stability of the yarn, it is usually necessary to adjust the spinning speed according to the requirements of the raw materials and products. When spinning ultra soft yarn, the rotor speed is generally controlled at a low level to reduce the occurrence of breakage and fuzz.
Comb roller speed: The speed of the comb roller also has a significant impact on the quality of the resulting yarn. Increasing the speed of the combing roller can improve the unevenness of the yarn, reduce coarse knots and cotton knots, but it can also decrease the strength and elongation of the yarn. Therefore, it is necessary to reasonably select the speed of the combing roller based on factors such as the impurities in the raw materials and the uniformity of the yarn.
5、 Winding and post-processing
Winding: New rotary spinning machines typically use a digital yarn winding system to ensure the quality of the yarn drum and the uniformity of the yarn. At the same time, the design of large ingot spacing and large coil packaging has also improved production efficiency and reduced labor intensity.
Post processing: Post processing the spun yarn, such as removing impurities from the yarn, oil treatment, and setting twist, to improve the quality and stability of the yarn.
6、 Quality Control and Testing
Online detection: New rotary spinning machines are usually equipped with online detection systems to monitor the quality indicators of the yarn in real time, such as twist, strength, elongation, etc., to ensure the stability and consistency of the yarn quality.
Finished product inspection: Inspect the finished yarn produced, including appearance quality, weight deviation, breaking strength and other indicators, to ensure that the product meets customer requirements.
In summary, the production process of the new rotary spinning machine involves multiple stages such as raw material preparation, cotton cleaning and blending, carding and drawing, rotary spinning, winding and post-treatment, as well as quality control and testing. Each stage requires strict control of parameters and operating procedures to ensure the stability and consistency of yarn quality.
