Angled Roller False Twist Device for Spinning Stability
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Solution Overview
Problem
Existing false twist devices for improving spinning stability in thread production either fail to significantly enhance stability or compromise thread quality due to limitations in twist introduction and distribution.
Innovation Solution
A method and device that introduce false twists into a thread by guiding it over a rotating roller with an axis angled to the thread path, causing the thread to rotate and twist as it passes, with additional twists introduced by contact with upper or lower rollers, allowing for adjustable twist direction and magnitude to enhance spinning stability without degrading thread quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a friction wheel contacts the yarn between the output rollers of a drafting unit and a ring spinning unit to introduce false wire, then spinning stability is improved, but the amount of false wire introduced is very small and yarn quality may be compromised
Solution Approach 1:
The false wire introduction process is segmented into multiple independent friction wheels (first friction wheel and second friction wheel) that act at different locations and orientations. The first friction wheel introduces false wire in the Z-direction while the second introduces it in the S-direction, allowing controlled distribution of twist that improves spinning stability without excessive false wire accumulation that would degrade yarn quality.
Solution Approach 2:
Different sections of the yarn path receive different treatments: the first friction wheel applies false wire introduction at a specific location with a particular orientation, while the second friction wheel applies it at another location with a different orientation. This localized differentiation allows optimal spinning stability improvement while maintaining overall yarn quality.
2Reliability
If multiple friction wheels are used to introduce false wire, then spinning stability is improved, but the device complexity increases
Solution Approach 1:
Both friction wheels serve the universal function of introducing false wire into the yarn, but they achieve this through different orientations and at different locations. This multi-functionality approach allows the system to improve spinning stability through combined action while maintaining a relatively simple overall device structure that reuses the same basic friction wheel component design.
3Reliability
If the axis of rotation of the friction wheel is arranged at an angle to the yarn path, then false wire is introduced into the yarn, but the yarn is deflected from its plane of the yarn path
Solution Approach 1:
Instead of accepting the yarn deflection as an unavoidable side effect, the invention uses a second friction wheel with its axis oriented perpendicular to the first, effectively inverting the approach. The second friction wheel introduces false wire in the opposite direction (S-direction versus Z-direction), which compensates for the path deflection caused by the first wheel while maintaining the beneficial false wire introduction for spinning stability.
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
Significantly improves spinning stability by increasing thread strength and reducing breakage while maintaining thread quality through controlled introduction of false twists at multiple points, allowing for adjustable twist direction and magnitude.
Implementation Method 1
a thread runs between the exit clamping point and the spinning point over a roller rotating about an axis of rotation inclined to the thread running plane, the thread simultaneously rotating about its longitudinal axis
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
In a method for introducing a false wire into a yarn (7) and a spinning machine, a yarn guide plane (20) is formed by the largely direct path of the yarn (7) through a drafting unit (3) to a spinning unit, as seen from above. The yarn (7) leaves the drafting unit (3) at an exit clamping point (6) formed by an upper roller (4) and/or a lower roller (5). Between the exit clamping point (6) and the spinning unit, the yarn (7) runs over a roller (8) rotating about a pivot axis (15) inclined to the yarn guide plane (20). Simultaneously, the yarn (7) rotates about its longitudinal axis, thereby introducing a first false wire into the yarn (7). The thread (7) is moved laterally out of the thread running plane (20) by the roller (8) and the thread (7) contacts the upper roller (4) or the lower roller (5) after the exit clamping point (6) in such a way that it introduces a second false wire into the thread (7).A device for introducing false wire into a thread (7) on a spinning machine has a device carrier (21) for attaching the roller to a structure of the spinning machine.