Ring Spinning Yarn Threading via Oblique Section and Air Propulsion
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Solution Overview
Problem
Existing methods for threading yarn into a traveller on a ring spinning machine are complex, inefficient, and prone to errors due to high yarn tension and vertical yarn direction, which can result in unsuccessful threading and increased energy requirements.
Innovation Solution
A method using a pair of vertically spaced positioning pins to create an oblique threading section for the yarn end, allowing it to be positioned near the ring flange, combined with a drive air nozzle to guide the traveller onto the yarn end, minimizing yarn tension and improving handling precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the yarn is tensioned vertically downwards from the package to the ring bench, then the yarn path is simplified, but the yarn load increases and the traveller may bounce off the yarn instead of threading into it
Solution Approach 1:
Instead of tensioning the yarn vertically downwards from the package to the ring bench, the patent inverts the approach by using an air nozzle to propel the traveller upwards along the yarn. The yarn is guided obliquely from the ring bench up towards the package, and compressed air from below pushes the traveller along this inverted path, allowing reliable threading without excessive yarn tension
Solution Approach 2:
The patent introduces a air nozzle that directs compressed air along the yarn path from the ring bench towards the package. This pneumatic force propels the traveller along the yarn, enabling it to thread into the traveller successfully without requiring high mechanical tension on the yarn, thus solving the reliability issue
2Ease of operation
If the air nozzle is positioned at a relatively large distance from the bobbin, then the threading operation is simpler, but increased energy is required to set the traveller into motion
Solution Approach 1:
The air nozzle is positioned to direct compressed air along the yarn path in advance of the traveller's motion. By pre-establishing the air flow path and positioning the nozzle to optimize air delivery, the system reduces the energy required to set the traveller into motion while maintaining operational simplicity
Solution Approach 2:
The patent optimizes the air nozzle parameters including its positioning distance, angle, and air pressure to achieve efficient traveller propulsion. By adjusting these parameters, the system reduces energy consumption while maintaining the simplicity of the threading operation
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 fast, reliable, and efficient automatic threading of yarn into the traveller with reduced space requirements, achieving high working speed, reliability, and long service life, even in tight spinning stations.
Implementation Method 1
compressed air is blown against the bobbin, and consequently the traveller on the ring flange is set into motion in the direction of the air flow
Implementation Method 2
sucks it into a suction duct such that the yarn is tensioned between the package and the suction duct
Data Source
Figure 1
Figure 1a
Figure 1b
AI summary
The invention relates to a method of threading a yarn (7) end into a traveller (4) on a ring (3) with a flange (30) at a spinning station of a ring spinning machine, in which the yarn end is sucked into a vacuum tube (A), by which the yarn end is guided into a position with respect to a bobbin and subsequently an oblique threading section (N) of the yarn end is created, which is placed at the flange (30) of the ring (3), this oblique threading section (N) of the yarn end being inclined at an angle (α) with respect to the horizontal plane, whereby the traveller (4) is set into motion by compressed air and is put onto the yarn end and the yarn end is threaded into the traveller (4) in the area of the threading section (N). The oblique threading section (N) of the yarn end is formed and positioned at the flange (30) of the ring (3) by at least one vertically situated positioning means (921, 922, 923). The invention also relates to a device for threading yarn (7) into a traveller (4) on a ring (3) with a flange (30) at a spinning station of a ring spinning machine.