Spinning Machine Control Device for Yarn Quality Optimization

Solution Overview

Problem

Existing spinning machines face challenges in optimizing both productivity and quality of yarn production, as increased rotor speed leads to higher thread breakage rates and decreased yarn quality, while maintaining desired yarn properties.

Innovation Solution

A method and device that utilize a control device to set production speed based on quality parameters and thread breakage rates, incorporating artificial intelligence for optimal adjustment, ensuring both productivity and quality are maintained within predetermined limits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If rotor speed is increased to improve productivity, then production speed increases, but thread breakage rate increases and yarn quality deteriorates

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies dynamics by continuously and automatically adjusting the rotor speed based on real-time yarn quality parameters and breakage rates. The control device dynamically modifies operating conditions rather than using fixed speeds, allowing the system to adapt to changing conditions and maintain optimal performance without manual intervention.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback mechanisms by recording yarn quality parameters and breakage rates during spinning, evaluating these data, and using the evaluation results to adjust production speed. This closed-loop control ensures that productivity improvements do not compromise yarn quality, as the system continuously monitors and responds to quality metrics.

Inventive Principle:

Principle #23Feedback

2Productivity

If rotor speed is increased to maximize productivity, then output increases, but yarn quality parameters fall outside specified limits

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The control device uses feedback from recorded yarn quality parameters to adjust rotor speed, ensuring that productivity gains do not compromise manufacturing precision. The system evaluates quality data in real-time and modifies operating conditions to maintain yarn quality within specified limits.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent applies parameter changes by modifying rotor speed based on evaluated yarn quality parameters and breakage rates. This dynamic adjustment of operating parameters allows the system to optimize both productivity and manufacturing precision by finding the optimal speed range for current production conditions.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If automatic piecing is used to handle thread breaks, then productivity is maintained, but the number of permissible breaks is limited by vacuum supply capacity

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies preliminary anti-action by preventing thread breaks before they occur through dynamic adjustment of rotor speed based on quality parameters and breakage rate trends. By proactively optimizing operating conditions, the system reduces the need for piecing operations and associated vacuum supply requirements.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system implements self-service by automatically adjusting rotor speed in response to quality feedback without requiring external intervention for piecing. This automated control reduces dependency on complex piecing mechanisms and vacuum supply systems while maintaining continuous production.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach allows for maximizing productivity while maintaining desired yarn quality by adjusting production speed according to quality parameters and thread breakage rates, ensuring that thread breaks are manageable and quality remains within specified limits.

Implementation Method 1

the centrifugal force generated in the rotor by the yarn circulation

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

the deposited fibers are given a twist due to the torsional moment of the rotating yarn end

Methodology Applied

Scientific EffectTorsional moment: Torque

Data Source

PatentEP3760772B1Optimization of the operation of a spinning machine

Publication Date: 2024.07.31

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AI summary

The present invention relates to a method for optimizing the operation of a spinning machine with regard to quality and productivity. The invention also relates to a device comprising a control unit and the spinning machine. According to the invention, a yarn with predetermined yarn properties is produced, a quality parameter of the yarn is recorded during the spinning process, a parameter for adjusting the production speed is specified, the quality parameter and the parameter for adjusting the production speed are evaluated, and the production speed is adjusted as a function of a target variable, wherein the target variable includes the quality parameter.