Air Jet Loom Display Device for Weft Insertion Optimization

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Solution Overview

Problem

Existing air jet loom systems face challenges in selecting sub-nozzle pressures to achieve stable weft insertion while reducing compressed air consumption, due to unclear changes in time differences detected by sensors, which can lead to unstable weft insertion and inefficient energy use.

Innovation Solution

A display device is integrated into the air jet loom that uses line graphs to represent main nozzle pressure and sub-nozzle pressure relationships, allowing operators to select optimal sub-nozzle pressures for minimizing air consumption while maintaining stable weft insertion by plotting and analyzing data on weft insertion completion angles and pressures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If sub-nozzle pressure is reduced to minimize compressed air consumption, then energy efficiency is improved, but weft insertion stability deteriorates

Engineering Contradiction:

Improvecompressed air consumptionVSAvoidweft insertion stability

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The system uses weft release sensors and weft arrival sensors to detect actual weft insertion timing, feeds this data back to the controller, which then adjusts sub-nozzle pressure dynamically to maintain stable weft insertion while minimizing compressed air consumption

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The sub-nozzle pressure is changed from a fixed static value to a dynamic variable that adjusts based on real-time detection of weft release and arrival timing, allowing the system to optimize air consumption while maintaining insertion stability under varying conditions

Inventive Principle:

Principle #15Dynamics

2Reliability

If sub-nozzle pressure is increased to ensure stable weft insertion, then weft insertion stability is improved, but compressed air consumption increases

Engineering Contradiction:

Improveweft insertion stabilityVSAvoidcompressed air consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system dynamically changes the sub-nozzle pressure parameter based on detected weft insertion timing data, selecting the minimum pressure required for stable insertion rather than using a consistently high pressure setting

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If weft release sensor mounting position is not optimized, then device complexity is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvesensor mounting configurationVSAvoidweft release time detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The system replaces reliance on precise mechanical sensor mounting with an electronic detection and correction approach, using sensor data combined with angular position information from the cradle to accurately determine weft release timing regardless of exact sensor position

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP2765229B1Air jet loom with a display device

Publication Date: 2016.01.06 TOYOTA INDUSTRIES CORP

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AI summary

There is provided a display device of an air jet loom (1) that includes a weft insertion device (2) causing a weft yarn (Y) released from a weft measuring and storing device (11) to move by compressed air injected from a main nozzle (7) and plural sub-nozzles (5) arranged in the direction of weft insertion, a setting and measuring device (21, 24, 28, 29, 37, 45) that serves to set and measure pressure or flow rate of the main nozzle (7) and also to set and measure pressure of the sub nozzle (5), and a controller (47) storing the measured pressure or flow rate of the main nozzle (7) and equipped with a display (61). The controller (47) causes the display (61) to show a line graph (63) representing pressure or flow rate of the main nozzle (7) with which weft insertion is completed at a previously set angular position of the air jet loom (1) for each of different predetermined pressures of the sub-nozzle (5).