Double yarn doubling device

Abstract

The invention relates to a double-strand doubling device which comprises two yarn paths arranged side by side, wherein yarns backed off by the two yarn paths are collected together by the two yarn paths, and then are wound on the same cone; each yarn path comprises a buoy and a yarn creel arranged nearby the buoy; and push devices are arranged at the bottoms of the buoys. The double-strand doubling device is characterized in that each buoy comprises an upper cap and a lower cap that are nested together; a floating spring is arranged in a cavity formed by one upper cap and one lower cap jointly and correspondingly; the push devices are arranged at the bottoms of the lower caps; push rods arranged on the push devices stretch into the lower caps and are abutted against the floating springs; pressure grooves for the yarns to pass are formed in the tops of the upper caps; two yarn guide wheels are arranged at the two sides of each pressure groove respectively; the lower caps are connected with air paths; a plurality of air gaps distributed along the yarn paths are formed in the bottoms of the pressure grooves; gravity sensors are arranged on the yarn creels, and are in data connection with the push devices; and backing-off transmission devices are arranged on the yarn creels.

Description

technical field [0001] The invention relates to a weaving device, in particular to a double-ply doubling device. 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 to strictly control the ...

AI Technical Summary

Problems solved by technology

[0004] Further, the problem encountered in doubling is that when two bobbins are unwound and plied at the same time, since the remaining yarn volumes of the two bobbin packages are not necessarily the same, especially when there is little remaining of one bobbin (yarn bobbin 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 unwinding turns, the greater the unwinding tension of the upper thread

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