Effect of pin carding plate on removal of impurities

To research the effect of pin carding plate on removal of impurities from card slivers,impurities tests were carried out for the card slivers under different gauges,taker-in speeds and doffer speeds using pin carding plate,saw-tooth carding plate and taker-in grid under the card taker-in by USTER AFIS single fiber tester.The results show that the ability of removing impurities of pin carding plate is worse than that of saw-tooth carding plate as a whole;the card using installing taker-in grid under taker-in is more favorable to impurities removing than that installing pin and saw-tooth carding plate.Visibie foreign matter(VFM) of the card slivers processing by saw-tooth carding plate is better than that of the card slivers processing by pin carding plate as a whole.The taker-in grid program is better than pin and saw-tooth carding plate program.The average diameter of impurities in the card slivers processed by pin carding plate is a bit larger than that of impurities in the card slivers processed by saw-tooth carding plate,while the average diameter of impurities in the card slivers processed by taker-in grid is larger than that of impurities in the card slivers processed by carding plate.