Foreign Technology Monopolized Special Shaped Reeds For Air-Jet Looms.

Air jet looms mainly use main nozzles and auxiliary nozzles.

The special-shaped reed is a special reed for air jet loom with auxiliary nozzle for weft insertion. It has the same function as the ordinary reed to determine warp arrangement position and weft yarn into the weaving port. The special reed combines the air diffusion device (Guan Daopian) with the reeds.

The reed teeth of the special-shaped reeds are hump shaped, and the two peaks are air flow channels (reed grooves) with jet weft insertion.

During the weft insertion, the main jet and auxiliary jet flow are intersecting with the air flow in the special-shaped reed trough and form a set of synthetic airflows that meet the technological requirements of weft insertion.

At present, textile enterprises demand more and more high quality air-jet looms. As the key equipment of air-jet looms, the improvement and improvement of their reliability in design, manufacture and use should be closely related to the development of the main engine. This has become the focus of research in manufacturing enterprises.

Gap between domestic and foreign profiled reeds

The material of profiled reeds is stainless steel strip. The SUS301EH developed by Japan Mu Di Co., which is resistant to wear and corrosion, and has proper rigidity, is almost entirely foreign to SUS301 (China numbering 1Cr17Ni7).

The material composition, strength, stiffness, color, punching and manufacturing rate are all much better than domestic materials. Our reed manufacturers have to choose imported stainless steel when manufacturing high-end products.

At present, most manufacturers in China do not use glue injecting machine for reed beam glued bonding and rolling reed, but manual method is used to squeeze glue into reed beam. This makes it easy to mix two kinds of components with uneven viscosity, produce bubbles in reed beam, and soft teeth will occur after drying. In addition, the use of viscous agents is rather wasteful. Only a few enterprises have introduced foreign automatic injection machines, such as Changzhou reeds and Shaanxi Qin ma.

Insufficient innovation ability

Although China has made the first profiled reed for more than 20 years, the understanding and theoretical research of reed is relatively superficial, and the product R & D is lagging behind.

It is said that Japan has been inspired by the development needs of the new air-jet looms, and there has been a new breakthrough in the development of reeds. However, our new products are very few, and our innovation capability is not enough, let alone the reeds design and the application of new materials.

With the increasing adaptability of air-jet looms to fabrics, more and more weaving varieties are needed. Textile enterprises' demand for high-grade new air-jet looms is increasing. This urges us to integrate the manufacturing level and basic functions of profiled reeds with international standards, so that the quality and service life of products can be upgraded to a new level. Therefore, profiled reed manufacturing enterprises must always pay attention to the development trend of the host machine.

At present, foreign jet looms are improving the way of weft insertion. We also need to carry out the research of new reed tooth profile and the application of single hump reed teeth on special reeds.

In the future, reed production enterprises in China should focus on the development of special reeds for glass fiber fabrics, because at present, the domestic market is monopolized by Japan Gaoshan company and French Burke power company, because domestic manufacturers are hard to break through in the links of SUS400J2, production technology and reed manufacturing process.

In addition, reed production enterprises should actively explore the wear of different fabric fibers.

The reason for the special reed is to select high quality and high hardness austenitic chromium nickel stainless steel and hardened tempered martensitic chromium stainless steel to make reeds.

Under the condition that traditional coated hard chromium surface reeds can not meet the requirements of high abrasion and abrasion resistance of special reeds on reeds, the research and development of environmentally friendly Cr/Cr-CN gradient wear resistant coating and nano ceramic surface plating technology are explored. For example, the surface of reeds is reinforced by wear-resistant coating such as DLC and glass fiber (SiC). The surface hardness of profiled reeds is higher than 2500HV, and the surface friction coefficient is reduced to less than 0.14, showing superior abrasion and corrosion resistance.