Sino Textile Machinery

A New Type of Weaving Reed

The further development of weaving system requires that the weaving reed and yarn guide, which occupy the core position in the weaving process can directly become part of the machine, rather than a part of weft insertion and let-off motion. The vibration of weaving loom reed developed by the composite technology decreased by 73% on average.

A New Type of Weaving Reed

1. The quality of stainless steel reed determines the motion characteristics of the loom
The quality of reed affects the motion characteristics of each weaving loom. For example, the frequency of weft breakage, air consumption and other energy consumed in air jet weaving are mainly determined by the geometric and dynamic properties of weft insertion device and reed dent. The service life of reed is improved by using special steel, coating and reed shape. Among the quality indexes of weaving reed production, it is especially important to improve the wear resistance of warp yarn.

2. The new weaving reed
With the continuous improvement of loom speed, weaving reed with lighter weight and better stability is needed. The new reed is characterized by its light weight and unique shock absorber, which lead to the vibration of the reed decreases by 73% on average. In the past three years, the traditional aluminum reed has been replaced by the composite material reed. The new reed has high elastic modulus and can effectively reduce the vibration of the reed. At the same time, the weight of the new reed decreases by 60% with the same reed height. Then, the momentum of the new reed also decreases by 60%. Therefore, it is not worthwhile to reduce the weight of reed by reducing the reed height. In the other hand, high-tech materials should be used to achieve this goal, considering that retaining a certain reed height is extremely important for reed elasticity and warp motion. The new reed is firmly bonded with two different adhesives, and each weaving reed can reduce some vibration during weaving, which is obviously beneficial to improving fabric quality.
In conclusion, the new composite reed has the following advantages:
A. it can reduce the energy consumption of looms, unnecessary losses and improve the quality of fabrics;
B. it can reduce the cost of maintenance and repair of looms;
C. it can reach the minimum net weight without shuttle bar movement;
D. there is no lateral reed vibration;
E. the start-up marks on fabric surface can be reduced;
F. firm adhesion;
G. different specifications available for different types of looms.

3. Development trends
In recent years, in order to meet the different needs of different customers for reeds, a variety of unique reeds have been developed: the "W H S-1 Reed", which made of unique steel can significantly reduce the wearout of warp and weft yarns. The “W H S-SS airflow reed” with novel geometric edge, which can make full use of its smooth surface, achieving higher efficiency with less weft, and warp losses. The aerodynamic properties of weft yarns are improved by using novel geometric polygons, and the air consumption is reduced as a result. FD strip steel can be applied in very fine reed dent (2500 dents per l00 mm). Through the new reed production method, more precise reed dents can be manufactured. Its density exceeds the corresponding standard. Up to now, the warp and weft yarns have been guaranteed unprecedentedly by using this new production method to produce reed teeth.
For the last method, it was demonstrated at ITMA (International Textile Machinery Exhibition) in 2003. Weaving technology will be further developed. For example: (1) the change of clamping system--by the development of new forms of quick response latch on the reed seat, the reed shape can be diversified; (2) the improvement of control of the reed on the warp yarn. In the reed, the warp breakage can be controlled by using a microchip on the side of the reed, which is connected with the conductor of each reed. Warp breakage can be observed by the light-emitting diode indicator on the outer side of the reed seat and the indicator on each loom.