Carbon Nanotube Yarn Production via Dynamic Guide Rotation
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Solution Overview
Problem
Existing yarn producing apparatuses fail to produce yarn with sufficient performance when applied to carbon nanotube fibers due to inadequate rotation of the traveler for yarn guide, resulting in insufficient twisting and performance issues with fibers having low load-bearing value and small mass.
Innovation Solution
A yarn producing apparatus with a wind driving mechanism, twist driving mechanism, and traverse driving mechanism that rotates and reciprocates a guide around a winding tube to twist and traverse fibers, forming a balloon to absorb tension variations and efficiently twist fibers, even those with low load-bearing values like carbon nanotubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional ring-type spinning apparatus with a traveler for yarn guide is used, then the apparatus can wind yarn onto a ring, but the traveler fails to rotate appropriately when applied to carbon nanotube fibers with low load-bearing value and small mass, resulting in insufficient yarn performance
Solution Approach 1:
The guide is rotated around the winding tube to twist the fibers and produce yarn, creating a dynamic twisting mechanism that adapts to low-mass fibers. The guide rotates in the same direction as the winding shaft, and the fibers or yarn are caused to swirl, forming a balloon that absorbs tension variations. This dynamic system ensures appropriate rotation even for carbon nanotube fibers with low load-bearing value.
Solution Approach 2:
The invention changes the operational parameters by causing the guide to rotate around the winding tube rather than using a conventional traveler on the ring. The rotation speed and direction are controlled to match the winding process, creating optimal twisting conditions for low-mass fibers. The balloon formation parameter absorbs tension variations, maintaining consistent twisting performance.
2Strength
If fibers with low load-bearing value and small mass are processed, then the fibers are more difficult to twist and control, but conventional apparatuses cannot provide sufficient twisting to achieve adequate yarn performance
Solution Approach 1:
The guide acts as an intermediary between the winding tube and the fibers. It rotates around the winding tube to impart twist to the fibers, which have low load-bearing value. The guide's rotation causes the fibers to swirl and form a balloon, which then absorbs tension variations. This intermediary mechanism enables effective twisting of delicate fibers that would be difficult to control with conventional travelers.
Solution Approach 2:
The balloon formed by swirling fibers or yarn beforehand absorbs tension variations that occur during the twisting process. This pre-formed balloon structure provides cushioning that protects the low-load-bearing fibers from excessive tension, making the twisting process easier and more reliable for delicate fibers like carbon nanotubes.
3Productivity
If the guide is rotated around the winding tube to twist fibers and form a balloon, then twisting efficiency is improved and tension variations are absorbed, but the device complexity increases compared to conventional ring spinning apparatuses
Solution Approach 1:
The guide serves multiple functions: it guides the yarn onto the winding tube, rotates around the winding tube to twist the fibers, and causes the fibers or yarn to swirl to form a balloon. This multi-functional component consolidates several operations into a single mechanism, improving twisting efficiency without proportionally increasing device complexity.
Solution Approach 2:
The invention merges the guiding function and the twisting function into a single rotating guide component. The guide both directs the yarn and imparts twist through its rotation around the winding tube. Additionally, the balloon formation is integrated into the twisting process, combining tension absorption with the primary twisting operation. This merging of functions improves productivity while controlling 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 apparatus effectively produces yarn with sufficient performance by twisting carbon nanotube fibers, enhancing their load-bearing capabilities and stability, and maintaining efficiency even with less elastic fibers.
Implementation Method 1
the fibers, yarn, or both are twisted and a balloon (the fibers, yarn, or both expanding like a balloon under centrifugal force) is provided
Implementation Method 2
the balloon appropriately absorbs tension variations produced in relatively less elastic fibers such as carbon nanotube fibers
Data Source
AI summary
A yarn producing apparatus produces CNT (carbon nanotube) yarn from CNT fibers while causing the CNT fibers to run. The yarn producing apparatus includes a wind driving mechanism that causes a winding shaft provided with a winding tube to rotate about a winding centerline of the winding shaft to wind the CNT yarn onto the winding tube, a twist driving mechanism that causes a guide to rotate around the winding tube and guide the CNT yarn to the winding tube, to twist the CNT fibers and produce the CNT yarn while causing the CNT fibers, CNT yarn, or both to swirl, and a traverse driving mechanism that causes the guide to reciprocate relative to the winding tube along the winding centerline of the winding shaft to cause the CNT yarn to traverse the winding tube.