In the field of knitting, circular knitting machines play an important role. Among them, knitting speed, speed-related factors, production speed and production efficiency have a direct and critical impact on product quality and corporate benefits. Today, let us explore these core elements in depth.
1. Knitting speed of circular knitting machines
Knitting speed is one of the important indicators to measure the working efficiency of circular knitting machines. Generally speaking, the higher the speed, the greater the amount of knitting work completed per unit time. However, too high a speed is not always beneficial. It may cause the machine to wear more and the yarn tension to become unstable, which in turn affects the quality of the product.
For example, some high-speed circular knitting machines are prone to uneven coil distribution and yarn breakage when producing fine fabrics. On the contrary, for some relatively heavy or complex fabrics, a moderate speed can ensure the stability of the knitting process and the quality of the product.
2. Factors affecting knitting speed
The value of the needle diameter of the circular knitting machine multiplied by the speed is called the speed factor (SF). A factor that can indicate the speed of the loom. The running track of the circular knitting machine is a circular motion, so even if the speed is the same, the peripheral speed varies according to the size of the needle cylinder diameter. In short, the speed of the large needle cylinder is slower, while the small needle cylinder is faster.
Therefore, when comparing the speeds of looms with different needle cylinder diameters, the speed factor is used
Calculation formula: Speed factor (SF) = [needle cylinder diameter] × [speed]
1. Yarn quality and characteristics
The material, thickness and strength of yarns vary, and the knitting speeds they can withstand are also different. For example, soft and fragile yarns are very easy to break when knitted at high speeds, while tough yarns can adapt to higher knitting speeds.
2. Machine performance and maintenance
A well-performing and regularly maintained circular knitting machine can maintain a stable knitting speed. On the contrary, if the machine parts are worn, the lubrication is not sufficient, or the control system fails, the knitting speed will inevitably be adversely affected.
3. Knitting process and fabric structure
Complex knitting processes and special fabric structures usually require lower knitting speeds to ensure that each coil can be formed accurately and without error.
Image
3. The relationship between production speed and production efficiency
Production speed refers to the length or quantity of fabric produced per unit time. Production efficiency does not only depend on production speed, but also covers many aspects such as product qualification rate, machine utilization rate and energy consumption.
The peripheral speed of the needle cylinder sometimes indicates the production speed (m/s). Some European loom manufacturers use this value instead of the loom speed.
Calculation formula: Loom production speed V (m/s) = 3.14 × 2.54 × needle cylinder diameter × speed
6000
= 0.00133 × needle cylinder diameter × speed
If compared with the productivity of looms with different yarn feeder numbers and speeds, the maximum number of coil rows that can be produced per minute is used for comparison. The calculation method of production efficiency is as follows:
Production efficiency = [number of yarn feeders] × [number of revolutions]
An efficient production process not only needs to have a high production speed, but also should ensure that the product quality is qualified and reduce the occurrence of defective and waste products. At the same time, rationally planning production plans, making full use of the machine's working time, and reducing energy consumption are all important ways to improve production efficiency.
In short, in the operation of circular knitting machines, knitting speed, speed factors, production speed and production efficiency are interrelated and affect each other as a whole. Only by comprehensively considering these factors and rationally adjusting and optimizing the production process can efficient and high-quality production be achieved.
I hope that through this introduction, you will have a deeper understanding of the speed-related issues of circular knitting machines. In future production practices, this knowledge can be used more effectively to enhance the competitiveness of enterprises.