Drafting device and control method of flyer frame

Abstract

This invention relates to a drafting system and a control method for roving machines, in which the drafting system includes a four roller drafting pattern, a four roller double-zone double apron drafting pattern, the four lines of lower rollers contain the following from the front to back: the first includes a metal groove roller, the second includes a metal knurling roller, the third is metal knurling roller and the fourth includes a metal groove roller, the four lines of upper rollers are: the first one is a roller cladding spring materials, the second is a metal apron roller or an apron upper roller cladding spring materials, the third one is a metal apron upper roller or an apron upper roller cladding spring materials and the fourth one is a belt roller cladding spring materials. The control method includes: double -apron low times of drafting is done for the front region, 2.5-10 times of double-apron middle times of drafting for the middle region and 1.1-2 times of low drafting for the back region.

Description

technical field [0001] The invention relates to a roving frame used in the pre-spinning process flow, in particular to a drafting device and a control method of the roving frame. Background technique [0002] One of the important technical purposes of the roving frame is to draw and draw the drawn sliver into fine and uniform roving. The above tasks are mainly completed by the drafting device in the roving frame. For hundreds of years, domestic and foreign textile technicians have devoted themselves to researching various drafting modes, so that the drafting mode of the roving frame has developed from simple roller drafting to three-up and four-down curve drafting, and then developed to the currently dominant Three-roller double-apron and four-roller double-apron drafting type. [0003] The drafting device of the roving frame in the prior art is a four-roller drafting type, as shown in Figure 1, which has the following disadvantages: the main drafting ratio in the middle a...

AI Technical Summary

Problems solved by technology

[0003] The drafting device of the roving frame in the prior art is a four-roller drafting type, as shown in Figure 1, which has the following disadvantages: the main drafting ratio in the middle area is relatively high, which has a bad influence on the evenness of the roving; Because of the long uncontrolled zone, it is unfavorable for the control of floating fibers, and it is also unfavorable for the evenness of roving

[0004] Therefore, there are still quality problems in the evenness of the roving spun by the current four-roller double-apron drafting mode, and there is a need for further technical improvement

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