Plying tension control device

Abstract

The invention relates to a plying tension control device. The plying tension control device comprises two yarn paths arranged side by side, and the two yarn paths collect yarns unwound by the two yarn paths separately and then wind the yarns on the same bobbin. Each yarn path comprises a buoy communicating with an air channel and a spring support arranged on the air channel, wherein the air channel is provided with a pressure valve, and the spring support is held on the pressure valve through buffering with a hold-down spring; the buoy comprises an upper cap and a lower cap sleeved with the upper cap, and a floating spring is arranged inside a chamber formed by the upper cap and the lower cap together; the lower cap is fixedly arranged, the upper cap can float up and down according to air pressure under the action of elastic force of the floating spring, and the top of the upper cap is provided with a press groove for allowing the corresponding yarn to pass through; the two sides of the press groove are each provided with a yarn guide wheel, and a plurality of air gaps distributed along a yarn path route are formed in the bottom of the press groove; and the spring support is provided with an unwinding transmission device.

Description

technical field [0001] The invention relates to a device for weaving, in particular to a device for controlling the tension of plying and doubling threads. 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. Therefor...

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, further, within the unwinding length of the yarn unit, the number of unwinding turns is more than a month, and the unwinding tension of the upper line is greater

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