Ring Spinning False Twist Yarn Production
Solution Overview
Problem
Existing yarn production technologies often increase production costs significantly, leading to yarn breakage and quality issues due to uncontrolled twisting and high tension, making it difficult to industrially produce high-quality, soft feel yarns without chemical treatments.
Innovation Solution
A ring spinning machine with multiple ring frames, a continuous linear false twisting device driven by a single motor, and two lappets positioned strategically to control yarn tension and twist, allowing for low twist multiplier yarn production without chemical treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If new technology is implemented in yarn production, then yarn quality and softness are improved, but production cost increases significantly
Solution Approach 1:
The patent combines multiple functions into a single integrated false twisting device that can apply both S-twist and Z-twist continuously. This merging of functions reduces the need for multiple separate devices and operators, thereby lowering production costs while maintaining high yarn quality through precise twist control.
Solution Approach 2:
The invention changes the twist parameter dynamically by applying false twist in the form of S-twist and Z-twist alternately or continuously. This parameter change allows the yarn to achieve softness and quality improvement without requiring excessive twist, thus avoiding the cost penalty associated with traditional high-twist methods.
2Strength
If twisting speed is increased to improve yarn strength, then yarn breakage rate increases due to uncontrolled residual torque
Solution Approach 1:
The false twisting device incorporates a feedback mechanism where the twist applied is controlled to be equal and opposite to the residual torque in the yarn. This feedback control neutralizes the unwanted torque, allowing high twisting speeds to be used without increasing yarn breakage rate, thus maintaining both strength and reliability.
Solution Approach 2:
The device applies false twist in advance to counteract the residual torque that would otherwise cause yarn breakage. By applying this preliminary anti-action, the yarn is prepared to withstand high twisting speeds without breaking, thereby improving both strength and reliability.
3Manufacturing precision
If chemical treatments are applied to achieve soft feel yarn, then yarn softness is improved, but harmful byproducts are generated
Solution Approach 1:
The patent replaces chemical treatments with a mechanical false twisting system that applies S-twist and Z-twist to the yarn. This mechanical substitution achieves the desired soft feel without generating any harmful chemical byproducts, thereby improving yarn softness while eliminating harmful factors.
4Ease of manufacture
If single false twisting device per spinning machine is used, then production cost is reduced, but twist control precision decreases
Solution Approach 1:
The single false twisting device is designed to perform multiple functions: it can apply both S-twist and Z-twist, control twist at different positions along the yarn, and adjust twist magnitude. This multi-functionality allows one device to replace what would traditionally require multiple devices, reducing production cost while maintaining twist control precision.
Data Source
AI summary
The present invention relates to a machine, a system, and textiles resulting from an industrially produced yarn, created through the incorporation of a linear false twisting device and two lappets positioned to affect a yarn during drafting. The invention results in a yarn having a low twist multiplier. The textiles products created from the produced yarn exhibit a soft feel without requiring the use of chemical treatments.