Yarn Unwinding Tension Dynamically Controlled Plying System

Abstract

The invention relates to a plying system for dynamically controlling unwinding tension of yarns. The plying system comprises two parallel yarn paths which are used for collecting unwound yarns together and then wind the yarns to a same yarn cone, wherein each yarn path comprises a floating cylinder and a yarn bracket, the floating cylinder is communicated with an air path, and the yarn frame is arranged on the air path. The plying system is characterized in that an electromagnetic valve is arranged on the air path, and a gravity sensor is arranged on the yarn frame and is in data connection with the electromagnetic valve; the floating cylinder comprises an upper cap and a lower cap which are sleeved together, and the lower cap is fixedly arranged and can float up and down according to air pressure; and a pressure slot for yarns to pass is formed in the top of the upper cap, a yarn guiding wheel is arranged on each of two sides of the pressure slot, a plurality of air gaps which are arrayed along the yarn path are formed in the bottom of the pressure slot, and an unwinding driving device is arranged on the yarn frame.

Description

technical field [0001] The invention relates to a weaving device, in particular to a yarn unwinding tension dynamic control ply system. Background technique [0002] Cone cone yarn has many advantages such as easy unwinding, not easy to fall off, etc. In the whole spinning process, cone cone yarn is an indispensable yarn weave form. Due to the needs of the next process, many processes often require the production of cones. shaped yarn. [0003] The doubling machine can usually combine two single yarns to form a plied yarn (twisted ply). Usually the most important issue in plying is to control the two yarns to maintain the same tension during plying, so that the two single yarns form a single yarn. There will be no problem of long and short threads when plying. If there is a problem of long and short threads, the ply yarn will easily break in the next two-for-one twisting stage, and it will also easily appear "small tails" on the twisting thread. Therefore, it is necessary t...

AI Technical Summary

Problems solved by technology

[0004] Further, the problem encountered in doubling is that when the two bobbins are unwound and plied at the same time, the remaining yarns in the two bobbins are not necessarily the same, especially when there is very little remaining in one bobbin (yarn bobbins smaller diameter), and there is a lot of remaining yarn in the other package (the diameter of the yarn package is larger), and one meter of yarn is also unwound. Packaged yarn with a larger diameter, furthermore, within the unwinding length of the yarn unit, the more the number of unwinding turns, the greater the unwinding tension of the yarn

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