Fibre Guiding Element with Injection Channel for Air-Jet Spinning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for returning a yarn end in air-jet spinning machines are not entirely effective, as they often fail to ensure the yarn end is properly guided through the fiber guide channel and turbulence chamber during the piecing process, leading to issues with yarn rotation and tear strength.
Innovation Solution
A fiber guide element with an injection channel that generates an air flow opposite to the spinning direction, using compressed air to create a negative pressure and turbulent flow within the fiber guide channel, facilitating the yarn end's return and enhancing its twist for improved tear strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the yarn end is returned through the spinneret using conventional methods, then the piecing process can be resumed, but the yarn end is not properly guided through the fiber guide channel and turbulence chamber, leading to poor yarn rotation and weak tear strength
Solution Approach 1:
The invention uses an injection channel that introduces compressed air into the fiber guide channel to create a negative pressure zone and turbulent air flow. This pneumatic mechanism actively draws the yarn end through the fiber guide channel and turbulence chamber, ensuring proper guidance and imparting sufficient twist to achieve adequate tear strength during the piecing process.
Solution Approach 2:
The injection channel is positioned to introduce compressed air at a specific location within the fiber guide channel, creating preliminary turbulent flow conditions before the yarn end arrives. This preliminary action prepares the air flow path to effectively guide and twist the yarn end as it passes through, ensuring proper yarn formation before piecing resumes.
2Reliability
If compressed air is introduced into the fiber guide channel through the injection channel, then the yarn end is effectively guided and twisted, but additional device complexity is required
Solution Approach 1:
The injection channel serves multiple functions: it introduces compressed air to create negative pressure for drawing the yarn end, generates turbulent flow for proper yarn guidance, and imparts twist to enhance tear strength. By consolidating these functions into a single structural element integrated into the spinneret, the invention achieves reliable yarn end return without proportionally increasing device complexity.
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
The air flow generated by the injection channel effectively guides the yarn end through the spinneret, ensuring successful piecing and increasing the yarn's tear strength by imparting additional twist, thus overcoming the limitations of previous methods.
Implementation Method 1
using compressed air to create a negative pressure and turbulent flow within the fiber guide channel
Implementation Method 2
create a negative pressure and turbulent flow within the fiber guide channel
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a fiber guiding element (1) for a spinneret (2) of an air spinning machine, which serves to produce a yarn (18) from a fiber composite (19), wherein the fiber guiding element (1) has an outer surface (3) which serves to be attached to a counter surface (4) of the spinneret (2) in order to fix the fiber guiding element (1) to or in the spinneret (2), and wherein the fiber guiding element (1) has a fiber guiding channel (5) with an inlet opening (6) and an outlet opening (7), which in operation of the spinneret (2) serves to guide the fiber composite (19) passing through the fiber guiding channel (5) as it enters a vortex chamber (8) of the spinneret (2).According to the invention, it is proposed that the fiber guiding element (1) has at least one injection channel (9) by means of which an airflow is generated within the fiber guiding channel (5) that extends from the outlet opening (7) towards the inlet opening (6) as soon as the injection channel (9) is pressurized with compressed air. The invention further relates to an air spinning machine and a method for operating the same.