Sliver drafting and cutting device and method for wool type acetate fiber

The invention provides a sliver drafting and cutting device and method for wool type acetate fiber. The sliver drafting and cutting device for the wool type acetate fiber is characterized by being sequentially provided with a tow creel, a tow vibration bar, a drafting and cutting device, a crimping device and a coiling device. The tow creel is arranged above a tow box, the drafting and cutting device comprises five drafting and cutting rollers, and four drafting areas are formed among the five drafting and cutting rollers and refer to the pre-drafting area, the drafting area, the accessory rolling area and the main rolling area. The crimping device comprises a tamping box, a crimping roller and a pressing plate are arranged in the tamping box, the crimping roller is arranged on one side of the pressing plate, and a top plug is arranged on the other side of the pressing plate. On the one hand, diacetate fiber can be effectively prevented from being damaged, the strength of the fiber is greatly protected, and compared with a traditional technology, the strength of the fiber obtained by the method is increased by about 20%. Moreover, the fiber obtained after drafting and cutting is crimped to a certain extent, the cohesive force between the fiber is increased, and the uniformity of slivers is improved.