Pneumatic Spinning Flat Plane Fiber Guide Twist Propagation
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Solution Overview
Problem
High-speed pneumatic spinning devices face challenges in stabilizing the spinning process due to twist propagation from the twisted fibers to those upstream, leading to unstable fiber reversal and separation within the spinning chamber.
Innovation Solution
A pneumatic spinning device with a fiber guiding section and a hollow guide shaft body, featuring a first passage with a flat plane portion that deviates from the shaft center, effectively reduces twist propagation by restraining the fiber bundle before it enters the spinning chamber, allowing for stable fiber reversal and spinning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the spinning speed is increased, then the productivity is improved, but the twist propagates from the twisted fibers to the upstream fibers, causing unstable fiber reversal and separation
Solution Approach 1:
The invention extracts and removes the harmful twist propagation from the system by introducing a twist prevention member that actively counteracts and eliminates the twist as it propagates upstream, allowing high-speed spinning without compromising stability
Solution Approach 2:
The twist prevention member acts as an intermediary element positioned within the fiber bundle path, mediating between the twisting action and the upstream fibers to prevent harmful twist propagation while maintaining the spinning process
2Stability of the object's composition
If the amount of reversed fibers is increased, then the twist propagation is enhanced, but the fibers upstream of the reversed fibers are not sufficiently reversed, leading to unstable spinning
Solution Approach 1:
The invention applies local quality by positioning the twist prevention member at a specific location within the fiber bundle, creating a localized zone that prevents twist propagation while allowing other regions to maintain their reversal characteristics
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 solution enables stable high-speed spinning by preventing twist propagation to the upstream fibers, ensuring effective separation and reversal within the spinning chamber, thus maintaining spinning stability.
Implementation Method 1
twists, by whirling airflow, the fibers passing through the spinning chamber and forms a yarn
Implementation Method 2
A downstream end where the first passage opens into the spinning chamber and an upstream end where the second passage opens into the spinning chamber are arranged with an interval in the direction of the shaft center of the hollow guide shaft body
Data Source
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AI summary
A pneumatic spinning device includes a fiber guide (101) and a spindle (102). The fiber guide (101) has a linear first passage (111) through which a fiber bundle passes. The spindle (102) has a second passage (122 through which the fiber bundle having passed through the first passage (111) is guided. An inner surface of the first passage (111) has a flat plane portion (151) arranged along the first direction in which the first passage (111) extends between an upstream end (111a) and a downstream end (111b) of the first passage (111). The interval (S1) in the second direction between the downstream end (151a) of the plane portion (151) and the center (122b) of the upstream end (122a) of the second passage (122) is equal to or greater than 0.8 mm and equal to or less than 3.4 mm.