Yarn Lifting Arrangement Pneumatic Detachment Ring Spinning
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Solution Overview
Problem
Existing automatic piecing units for ring spinning machines are unable to successfully detach and lift broken yarn ends from the spinning cop, necessitating manual intervention and yarn sequence restarts, leading to inefficiencies and yarn wastage.
Innovation Solution
A yarn lifting arrangement featuring a base plate with pneumatic actuation and a plurality of jet members positioned around the cop, which use air currents to detach and lift the broken yarn end upwards towards the drafting zone for automatic piecing, utilizing a specific sequence of air jet purging by the jet members to ensure successful detachment regardless of the yarn's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual piecing operation is used, then broken yarn can be detached and pieced, but labor intensity is high and productivity is low
Solution Approach 1:
The broken yarn end is automatically detected, detached, and lifted by the piecing unit without manual intervention. The system serves itself by using sensors to detect yarn breaks and automated mechanisms to perform the piecing operation, eliminating the need for continuous manual monitoring and intervention.
Solution Approach 2:
Manual mechanical piecing operation is replaced with an automated piecing unit that uses mechanical sensors for detection and automated mechanical components for detaching and lifting the yarn end. This substitution of manual mechanical operations with automated mechanical systems increases productivity while reducing labor requirements.
2Productivity
If automatic piecing unit is introduced, then productivity increases, but ability to detach yarn from cop is insufficient
Solution Approach 1:
The yarn detachment process is divided into multiple sequential stages: detection of broken yarn end, purging of air through jet members to loosen the yarn, detachment from the cop, and lifting to the drafting zone. This segmentation of the complex detachment process into manageable stages ensures reliable completion of each step, thereby improving overall detachment success rate.
Solution Approach 2:
Pneumatic jet members are used to blow air through multiple nozzles positioned around the cop to purge and loosen the broken yarn end from the wound yarn. This pneumatic action effectively separates the broken yarn end from the cop without manual intervention, ensuring reliable detachment and enabling successful automatic piecing operation.
3Loss of substance
If yarn breakage is not detected promptly, then yarn wastage increases and production efficiency decreases
Solution Approach 1:
Sensors are positioned to continuously monitor the yarn path and provide real-time feedback on yarn breakage conditions. When a break is detected, the system immediately activates the piecing unit to perform detachment and piecing operations. This closed-loop feedback system ensures prompt detection and response, minimizing both yarn wastage and production delays.
Solution Approach 2:
The piecing unit is pre-positioned and ready to act immediately upon detection of a yarn break. The system performs preliminary preparation by having the detachment and lifting mechanisms in standby position, enabling immediate action when breakage occurs, thereby reducing detection delay and preventing yarn wastage.
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
Enables efficient and automatic detachment of broken yarn ends from the spinning cop, reducing manual labor and yarn wastage by ensuring reliable lifting and piecing across the entire spinning frame, even when breaks occur at any position from top to bottom.
Implementation Method 1
a plurality of jet members (108) configured to position around the contour of the opening, supplying air current in the working position to detach the tangled yarn end from the spinning cop (110) and to lift the yarn upwars
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3(A)~3(B)
AI summary
The present invention relates to broken yarn lifting arrangement to detach the broken yarn end from the spinning cop to enable automatic piecing operation in textile ring spinning machines. Accordingly, yarn lifting arrangement, comprising of a base plate having a first end and a second end. The first end connected to an actuating means provides the base plate working position in the forward motion and home position in the backward motion. The second end is a free end having an opening near to the free end configured to encircle a cop of a spindle in the working position. Said arrangement further comprises plurality of jet members with plurality of orifices configured to position around the contour of the opening, supplying air current in the working position to detach the tangled yarn end from the spinning cop and to lift the yarn upwards towards the drafting zone to enable effective automatic yarn piecing in the textile machine.