Nearly 20 years, carding generally have high-speed operation. Cylinder rotational speed from 150r / min to 300-450r / min, licker, Randolph and other speed also increased. Taiwan when productivity thus improved. In the case of high-speed operation, high-speed rotation of the various parts is also driven by the rapid increase in air flow, and thus prone to the following phenomena:
1, licker cover to give pressure roller cotton at higher cashmere roll spending increased or fly overflowing, surge wall flower.
2, from the feed plate at the rear ran down to the belly of the airflow increases, the fiber is not easy to crawl and roll stabbed whereabouts become noil.
3, mesh drain bottom is easy to produce "plug paste" and, therefore, easy to make the car after belly noil increased.
4, the cover plate at the entrance to the air flow increases, an increase in the rotary cover the entire work area sprayed cotton dust stream. Cover the work area in the region is still part of the air sucked from the slit of the comb.
5, the top cover plate on the air increases, so sometimes makes chopper spend less serious can not be discharged into strips
6, fly to Astoria and the lower plate near the front triangle plus, accumulation, easy to produce fibers are formed into a group of yarn faults. Both sides of the webs of breakable edge.
7, the former East belly noil increase, there will be a large drain at the end of the entrance to the big boom flow inhaled dust ejected from the rod portion after that Astoria has formed webs appear holes or generate large rolling bad drain end of the phenomenon.
In order to reduce or avoid such a phenomenon in the carding machine must be additional vacuum suction noil means, located in the high-pressure gas stream at or easy to produce undesirable phenomena of the site, so that high-speed carding normal production. Typically, there are at least three carding suction points, or feed plate and taker at the cover (licker put the hood), Astoria cover (also known as Astoria triangle) and rear belly (also including the expansion of the vehicle in front tripe). These three points Suction device called the "Three suck." Some are still other sites known for distributing cotton dust cover entrance, the installation of the cleaning roller cleaning point Astoria stripper arrangement, the roll bar at the ring, so that the suction point to five or more suction and divided into upper and outboard lower two districts, often at various points continuous suction machine, while the machine under the (car belly) is used intermittently suck. The installation of the respective suction point role.