Winding Tube Capture Part for Tail Yarn Securing
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Solution Overview
Problem
In false twisting machines, the continuous supply of yarn prevents the prior preparation of a tail yarn, making it difficult to connect multiple packages formed on a single winding tube, which reduces operation efficiency and increases the number of package exchanges.
Innovation Solution
A winding tube with a capture part, such as a groove on its outer surface, captures the yarn winding start end between adjacent packages, allowing for the formation of a tail yarn that can be connected to the next package, ensuring the yarn supply can continue uninterrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple packages are formed on one winding tube, then productivity is improved and unwinding characteristic is improved, but yarn amount of each individual package becomes small
Solution Approach 1:
A tail yarn is prepared in advance at the winding start of each package by inserting it into a harness hole formed in the winding tube. This preliminary preparation enables continuous unwinding across multiple packages without interruption, resolving the contradiction between forming multiple small packages and maintaining sufficient yarn amount for efficient post-process operation.
2Reliability
If multiple packages are formed on one winding tube, then unwinding characteristic is improved, but number of package exchanges increases
Solution Approach 1:
The tail yarn is prepared beforehand at the start of each package winding, enabling seamless connection between packages. This eliminates the need for frequent package exchanges in the post-process, maintaining both good unwinding characteristics and high operation efficiency.
3Ease of manufacture
If a tail yarn is prepared beforehand by manual labor, then yarn connection is enabled, but preparation time increases
Solution Approach 1:
The winding tube itself provides the harness hole structure that automatically secures the tail yarn during the winding process. This self-service mechanism eliminates the need for manual preparation work, enabling yarn connection without increasing preparation time.
Data Source
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AI summary
[Problem to be Solved] An object is to provide a winding tube in which a yarn which is to be a tail yarn can be secured beforehand at winding start of a package when a plurality of packages are formed on the one winding tube by a winding device 18 of a false twisting machine. [Solution] A winding tube 19 is held by one cradle 20 provided in a yarn winding device 18 of a false twisting machine 1000. Onto the winding tube 19, a plurality of supplied yarns Ya and Yb are wound so as to form a plurality of packages P. In the winding tube 19, at a position between a pair of adjacent packages P1 and P2 among the plurality of the packages P, a second capture part 192 is provided which captures a yarn winding start end YbS of at least one of the pair of the packages P1 and P2.