New technology of warp knitting machine knitting development

1. Development of warp knitting machine in China

In recent years, as China's textile machinery continues to improve its independent research and development capabilities, breakthroughs have been made in the performance of textile machinery. The high-speed warp knitting machine, multi-bar warp knitting machine, double needle bed warp knitting machine, warping machine and other equipment produced by Chinese enterprises better adapt to and promote the development of the industry. China has gradually formed a warp knitting machinery production base, and Chinese warp knitting machinery manufacturing enterprises represented by Changzhou Nova Textile machinery company, Fujian Xingang textile machinery company, Fujian Jilong machinery industry company, Shantou Zhongxiu textile machinery company are thriving. At present, the warp knitting machine is developing in the direction of high-speed production, intelligent control, diversified functions, simple operation, computerized design and networked management.

2. Development trend of modern international warp knitting machine

2.1 High speed warp knitting machine

On modern Tricot warp knitting machines, various methods are used to reduce the weight of moving parts, so as to reduce the dynamic load on the transmission part, so as to minimize the deformation and vibration of the parts, thus greatly improving the running speed of the machine, and the maximum speed can reach 3300R/min. The new comb bar has higher hardness and reduced weight.

2.2 High machine numbering of warp knitting machine

Most modern warp knitting machines use English machine numbers, which are defined as the number of knitting needles per 25.4mm (1 inch) of needle bed length. E28 machine is suitable for the production of underwear, shirts, mosquito nets and some decorative fabrics. It has great versatility and is one of the main machines equipped in various warp knitting factories. E32 machine is mainly used to produce underwear fabrics; E36 machine is mainly used to produce thin underwear; In order to increase the silk feeling and pilling resistance of fabrics, machines up to E44 have appeared.

2.3 Widening of warp knitting machine

The working width of modern warp knitting machines also has a trend of further increase. Although 3302 mm (130 inches) wide machines are still in production and use, most modern tricot warp knitting machines have used 4318mm (170 inches) wide machines. At present, the maximum width has reached 6604mm (260 inches). In addition, the manufacturing and adjustment of machines with large width are more complex, which puts forward higher requirements for the manufacturing and adjustment of these mechanisms. Therefore, the wide Tricot warp knitting machine has better economic performance in mass production, so it has been widely used.

2.4 Electronization of main mechanism of warp knitting machine

The single functions of the warp knitting machine are more electronic, creating conditions for electronic integrated control. The application scope of electronic technology in the warp knitting machine continues to expand, and the main functions of the warp knitting machine are electronic. Such as electronic let-off, electronic traverse, electronic jacquard, electronic draw-off and take-up, electronic weft lining, electronic yarn breaking self-stop, etc. the electronization of these single functions creates conditions for the integrated control of the whole machine. With the rapid development of servo drive technology, special feature uses servo driven warp knitting electronic let off, electronic comb bar traverse, electronic pull and take-up, electronic weft laying, etc. to be popularized and applied in warp knitting equipment, which provides an effective means for the development and quality control of warp knitting products.

2.5 Diversified warp knitting methods

Modern warp knitting machine method has jacquard, multi carding and their combination.

2.5.1 Jacquard warp knitting machine

In the past ten years, jacquard warp knitting machine has developed rapidly, from mechanical jacquard device to electromagnetic controlled jacquard device, and then from electromagnetic device to piezoelectric device. Jacquard jacquard principle has been further developed. According to the different principles of jacquard jacquard, jacquard warp knitting machines can be divided into four types. (1) Loop type jacquard warp knitting machine (2) weft lined jacquard Raschel warp knitting machine (3) yarn pressing jacquard Raschel warp knitting machine (4) floating jacquard Raschel warp knitting machine.

2.5.2 Modern multi comb warp knitting machine

Great changes have taken place in the structure of modern multi comb warp knitting machines, the use of raw materials, the principle of raising flowers, and the design of patterns. At present, it has become the main model for the production of lace, women's underwear and outerwear. Multi comb warp knitting machines can be divided into the following categories according to their structural characteristics, uses and additional devices. (1) Weft lined multi carding warp knitting machine (2) looping multi carding warp knitting machine (3) yarn pressing multi carding warp knitting machine (4) condolet multi carding warp knitting machine (5) jacquard tufted knicker multi carding warp knitting machine (6) tex tufted knicker multi carding warp knitting machine.

3. Summary and conclusion

Warp knitting is an important textile processing method, which has the characteristics of high production efficiency, variety of designs and flexible structure. With the successful development and application of piezoelectric ceramic jacquard technology, servo drive technology, CFRP technology and integrated control technology in warp knitting equipment, warp knitting technology has achieved rapid development in machine speed, control integration, function diversification, operation convenience and so on. With the application of various high and new technologies in modern warp knitting machines, the numerical control and electronic level of warp knitting equipment will continue to improve, the efficiency of warp knitting machines will be greatly improved, and labor unions will be further reduced.