Yarn winding device and yarn unwinding method

Abstract

A yarn unwinding assisting device (20) of a yarn winding unit (1) includes a movable cylinder (31) that, during yarn unwinding from a yarn feeding bobbin (8), is to be put on to cap an end portion on a side from which a yarn is unwound of the yarn feeding bobbin (8) to thereby regulate a bulge of a curved path of the yarn. An inner diameter of the movable cylinder (31) is greater than or equal to 28 mm and less than or equal to 30 mm.

Description

technical field [0001] The present invention relates to a yarn winding device and a yarn unwinding method for winding a yarn unwound from a yarn supplying bobbin. Background technique [0002] Conventionally, there is known an automatic winder that unwinds the yarn of a yarn-supplying bobbin produced by a spinning machine or the like, removes yarn defects such as slubs, and simultaneously winds the yarns of a plurality of yarn-supplying bobbins. Yarn splicing to form a package. Among them, Japanese Patent Application Laid-Open No. 10-29765 discloses an automatic winder which has the function of limiting the expansion of the unwound yarn in order to stabilize the tension of the yarn during unwinding and prevent yarn breakage (also called Balloon) yarn unwinding aid. [0003] The yarn unwinding auxiliary device of Japanese Patent Application Laid-Open No. 10-29765 has a movable cylinder that covers the upper end of the yarn feeding bobbin (yarn yarn) that is supported when t...

AI Technical Summary

Problems solved by technology

As a result, the yarn entangled with burrs temporarily falls off from the yarn supplying bobbin, that is, so-called slaffing occurs, and yarn breakage is likely to occur.

In this way, simply increasing the winding speed will frequently cause yarn breakage due to the above-mentioned knock-off, and therefore, the production efficiency of the package will be reduced instead.

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