Air-jet Spinning Device with Sharply Bent Fiber Guide
Solution Overview
Problem
Conventional spinning devices experience fiber loss due to unconstrained fibers being separated from the core fiber as they move through the introduction channel, which is gradually twisted, leading to inefficient yarn production.
Innovation Solution
A spinning device with a fiber bundle introduction member featuring a sharply bent introduction channel surface, where the fiber bundle is guided along a series of surfaces with almost right-angle angles to ensure convergence and constraint, reducing fiber separation and loss. The channel's design includes a first, second, and third surface with specific angles to securely guide the fiber bundle, and the introduction member is formed integrally to eliminate manufacturing joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the introduction channel is formed to be gradually twisted, then the fiber bundle is gradually constrained, but unconstrained fibers separate from the core fiber causing fiber loss
Solution Approach 1:
Instead of using a gradually twisted introduction channel that allows fiber separation, the patent inverts the approach by using a sharply bent portion that creates immediate and complete constraint. This inversion changes the constraint mechanism from gradual to abrupt, preventing fiber separation at the source.
Solution Approach 2:
The patent changes the geometric parameter of the introduction channel from a gradual twist to a sharp bend with specific angle characteristics. This parameter change transforms the constraint mechanism, creating a more effective constraint that prevents fiber separation while maintaining the necessary guidance function.
2Ease of operation
If the introduction channel is gradually twisted, then the fiber bundle can be guided, but convergence of the fiber bundle is insufficient
Solution Approach 1:
The patent inverts the conventional gradual guidance approach by implementing a sharp bend configuration. This inversion provides immediate and definitive convergence while still maintaining ease of operation through the streamlined sharp-bend geometry that guides the fiber bundle efficiently.
Solution Approach 2:
The sharply bent portion introduces a specific curvature configuration that enhances fiber bundle convergence. The curved geometry of the sharp bend creates effective constraint and guidance, improving convergence while maintaining operational ease through smooth surface transitions.
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 improved convergence and constraint of the fiber bundle within the introduction channel significantly reduce fiber loss, ensuring that more fibers are incorporated into the spun yarn, enhancing the yarn production efficiency.
Implementation Method 1
air is jetted from the air nozzle toward a tip end of the spindle and a swirling airflow is generated in a swirling airflow generation chamber that is a space formed between the nozzle block and the spindle
Implementation Method 2
The wound fibers are wound around a fiber at a center of the fiber bundle continuously introduced into the yarn passage hole
Implementation Method 3
a sharply bent portion constraining the fiber bundle is formed on a fiber bundle guide surface, the fiber bundle in the introduction channel being moved along the fiber bundle guide surface
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fiber bundle guide surface of an introduction channel 32 is configured to include a first surface 78 ranging from an inlet 70 side of the introduction channel 32 to an outlet 71 of the introduction channel 32, a second surface 79 connected to the first surface 78 at a downstream side of a swirling direction of a swirling airflow and ranging from the inlet 70 side to the outlet 71, and a third surface 80 connected to the second surface 79 at the downstream side of the swirling direction and ranging from the inlet 70 to the outlet 71. Each of an angle between the first surface 78 and the second surface 79 and an angle between the second surface 79 and the third surface 80 is set to be almost right angle. If a fiber bundle fed from a draft device is introduced into the introduction channel 32, the fiber bundle is sharply bent and surely constrained by the introduction member, thereby making it difficult to separate fibers from the fiber bundle and making it possible to reduce fibers causing fiber loss (Fig.3).