The presence of mechanical waves will cause uneven combing

The increase in the Nim yarn company of long fibers in the combed noil means that the combed noil is reduced. To reasonably reduce the rate of combed doffing and to control the increase in the shorting rate of the two processes of combing and combing, it is necessary to start from the process machine and carding equipment to avoid excessive sliver and combing during carding and combing. The increase in the rate of short linters and the removal efficiency of neps and linters in the opening, cleaning, carding, and combing processes of the front spinning process should also be controlled. 2.7 Control of combing mechanical waves

The presence of mechanical waves will cause uneven combing and will affect the quality of the yarn. It is caused by the poor mechanical state of the periodic rotation. These periodic defects can be checked by the peak intensity shown on the spectrogram. 'Chimney' reflects that equipment maintenance personnel can find out the cause and solve it based on experience or calculation. 2.7.1 Common periodic mechanical wave wavelength defects position

There are many factors affecting the common periodic mechanical wave of the comber. The determination of the position of the common periodic mechanical wave wavelength defects: 5cm～13cm is the first draft roller and the first top roller bending 1. Defects caused by the wear of the roller sleeve bearing; 10cm～45 cm and a series of harmonics are the parts of each draft gear wheel system and toothed belt transmission system; 35cm～55 cm are the parts of the roller separation roller;

75cm ～100cm is the second and third draft roller parts; 135cm～180cm is the fourth and fifth draft roller parts; 110cm～130 cm is caused by the wear of the inner link bearing of the car head, and the meshing of the star wheel and the 56-tooth bridge wheel, Among them, the wave of about 120 cm may be the loop effect wave, which belongs to the pseudo-period quality variation. The wave disappears immediately after the sliver is turned back.