Air-jet Spinning Device Independent Air Supply Segmentation
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Solution Overview
Problem
Air-jet type spinning devices face high compressed air consumption and production costs, and their susceptibility to dirt and fibers compromises yarn quality and reproducibility due to structural limitations and uncontrollable air jet direction within the spinning chamber.
Innovation Solution
The air-jet type spinning device employs separate and independent air supplies for upper and lower crowns of injection holes, allowing for optimized air flow rates and directions to control fiber twisting and opening, reducing air consumption and improving reproducibility by avoiding direct interference with fibers and enabling precise control over spinning conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple holes for compressed air injection are used, then fiber opening and wrapping capability is improved, but air consumption and energy cost increase
Solution Approach 1:
The invention divides the air injection system into two separate independent supplies: one for upper holes and one for lower holes. This segmentation allows optimized air distribution where upper holes provide tangential injection for fiber wrapping and lower holes provide downward injection for fiber opening, achieving effective fiber processing with reduced total air consumption compared to multiple holes all requiring high air flow
Solution Approach 2:
Different regions of the spinning chamber receive air with different properties: upper holes receive air optimized for tangential direction to create whirling motion for fiber wrapping, while lower holes receive air optimized for downward direction for fiber opening. This local differentiation of air injection quality improves overall efficiency while reducing total air consumption
2Use of energy by moving object
If small spinning chambers are used to limit compressed air consumption, then air consumption is reduced, but susceptibility to dirt and fibers increases compromising yarn quality
Solution Approach 1:
The separation of air injection functions into upper and lower independent systems allows the spinning chamber to be larger in volume while maintaining controlled air flow paths. The upper tangential injection creates a controlled whirling zone for fiber wrapping, while lower downward injection handles fiber opening, preventing uncontrolled air propagation that would carry impurities throughout the chamber
Solution Approach 2:
The invention introduces a structured air injection system that acts as an intermediary between the compressed air source and the fibers. The upper and lower hole systems mediate the air flow to create controlled motion patterns, preventing direct uncontrolled air-fiber interaction that would allow impurities to compromise yarn quality
3Manufacturing precision
If compressed air jets are directed in precise tangential and downward directions, then fiber wrapping and vacuum creation are improved, but device complexity increases
Solution Approach 1:
The invention simplifies the complex geometric constraints by segmenting the air injection into two functional groups: upper holes angled for tangential injection to create whirling motion, and lower holes angled for downward injection to create vacuum. This segmentation transforms a complex multi-constraint problem into two simpler, independently optimized injection systems
Solution Approach 2:
The invention employs two independent air supply systems that can be dynamically adjusted separately. This allows optimization of air flow rates and directions for upper and lower holes independently, adapting to different spinning conditions without requiring complex mechanical adjustments, thereby simplifying the overall device structure while maintaining precision
4Productivity
If known air jet solutions are used, then spinning function is achieved, but reproducibility of yarn quality is poor
Solution Approach 1:
The independent upper and lower air supply systems allow separate optimization and control of fiber wrapping and opening processes. This segmentation enables precise control of each function's air flow parameters, ensuring consistent reproduction of yarn quality by independently tuning wrapping and opening conditions without interference between the two processes
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 solution reduces air consumption, enhances yarn quality and reproducibility by optimizing air flow rates and directions, ensuring consistent and strong yarn production with reduced energy costs and improved control over spinning conditions.
Implementation Method 1
This ribbon is subjected to the action of compressed air-jets that allow the outer fibers to open and wrap around the central ones and form the yarn
Implementation Method 2
create the vacuum necessary to suction the fibers inside the spinning spindle
Data Source
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AI summary
An air-jet type spinning device (4) comprising a body (8) at least partially hollow that delimits a spinning chamber (12), a fiber feeding device (16) facing said spinning chamber (12)) to feed the fibers into the spinning chamber (12), a spinning spindle (20) at least partially inserted into the spinning chamber (12) and provided with a spinning channel (24) for the transit of yarn obtained from said fibers, the spinning channel (24) having a main axis defining a spinning direction (X-X) and having a front input (28) for introducing the fibers into said spinning channel (24). Advantageously, the body (8) comprises at least one upper crown of holes (32) comprising at least two upper injection holes (36) which input an upper flow rate of air in the spinning chamber (12). Furthermore, the body (8) comprises at least one lower crown of holes (40) comprising at least two lower injection holes (44) which input a lower air flow into the spinning chamber (12), wherein said crowns of upper and lower holes (32,40) are fluidically connected to distinct air supplies. The upper injection holes (36) extend into the spinner chamber (12) at a first point (48) upstream of the front input (28), with respect to a direction of advancement (F) of the yarn in the spinning channel (24), wherein the lower injection holes (44) extend into the spinning chamber (12) at a second point (56) downstream of the front input (28), with respect to a direction of advancement (F) of the yarn in the spinning channel (24).