Yarn Pooling Roller with Dual Taper Sections

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Solution Overview

Problem

Existing spinning units face challenges in systematically winding spun yarn around a yarn pooling roller and controlling yarn movement when the yarn breaks, leading to potential slippage and fiber waste.

Innovation Solution

A yarn pooling device with a yarn pooling roller featuring a first tapering section that widens from the base end towards the yarn supplying device by a first inclination angle and a second tapering section that widens from the first tapering section towards the yarn supplying device by a second, smaller inclination angle, which receives and guides the yarn, and prevents yarn end movement when broken.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single tapering section is used on the yarn pooling roller, then the structure is simple, but the yarn cannot be systematically wound and the yarn end movement cannot be controlled when broken

Engineering Contradiction:

Improveyarn winding systematics and yarn end controlVSAvoidyarn pooling roller structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The yarn pooling roller is divided into multiple functional sections: a first tapering section with a first inclination angle for receiving yarn, and a second tapering section with a second inclination angle for guiding yarn to the base end. This segmentation allows each section to perform its specific function optimally, achieving systematic winding and yarn end control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different sections of the yarn pooling roller are given different inclination angles tailored to their specific functions. The first tapering section has a larger inclination angle suitable for receiving yarn from the yarn supplying device, while the second tapering section has a smaller inclination angle for precise yarn guidance. This local differentiation of geometric properties optimizes performance.

Inventive Principle:

Principle #3Local quality

2Reliability

If the inclination angle of the yarn pooling section is changed in multiple levels, then yarn winding can be improved, but the structure becomes more complex

Engineering Contradiction:

Improveyarn winding smoothnessVSAvoidyarn pooling roller structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The yarn pooling roller incorporates variable inclination angles along its length, transitioning from a first angle in the first tapering section to a second angle in the second tapering section. This dynamic geometric variation allows the roller to adapt to different yarn path requirements, ensuring smooth winding while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If a tapering section with large inclination angle is used, then yarn can be received easily, but yarn end may move towards the tip end section when broken

Engineering Contradiction:

Improveyarn receptionVSAvoidyarn end position control

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The yarn pooling roller is segmented into a first tapering section for yarn reception and a second tapering section for yarn guidance. The first section has a larger inclination angle facilitating easy yarn reception, while the second section has a smaller inclination angle that prevents yarn end movement towards the tip when broken, thus controlling yarn end position.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first tapering section is designed with a larger inclination angle optimized for yarn reception from the yarn supplying device, while the second tapering section is designed with a smaller inclination angle optimized for preventing yarn end movement. This local optimization of geometric properties addresses both requirements simultaneously.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP2573019B1Spinning unit with a yarn pooling device, and spinning machine

Publication Date: 2017.01.18 MURATA MASCH LTD

AI summary

A yarn pooling roller (51) includes a yarn pooling section (52), a first tapering section (58) that widens from a base end section (52a) of the yarn pooling section (52) towards the yarn supplying device side by a first inclination angle (¸1), and a second tapering section (59) that widens from the first tapering section (58) towards the yarn supplying device side by a second inclination angle (¸2) that is smaller than the first inclination angle (¸1). The second tapering section (59) receives the guided spun yarn (Y) and prevents an end of the spun yarn Y from moving towards the tip end section (52b) side of the yarn pooling section (52) at a breakage of the spun yarn Y. The first tapering section (58) guides the spun yarn (Y) received by the second tapering section (59) to the base end section (52a).