Disc Twisting Unit Speed Switching for Easier Yarn Threading
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Solution Overview
Problem
Yarn threading to a disc-type twisting unit in draw texturing machines is difficult due to fluctuating yarn tension caused by contact with rotating discs, leading to potential disc damage and increased machine size when using opening and closing twisting units.
Innovation Solution
A draw texturing machine with individually controlled twisting units and feed rollers, allowing manual speed switching of disc rotation from a higher production speed to a lower speed for threading, and using notification units to ensure safe yarn passage without opening a space between discs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If yarn threading is carried out with rotating discs at high speed, then production efficiency is improved, but yarn tension fluctuates making threading difficult and risking disc damage
Solution Approach 1:
The patent applies the dynamics principle by making the disc rotation speed adjustable rather than fixed. The disc rotation speed switching unit allows operators to switch between a first rotation speed (slower) for yarn threading and a second rotation speed (faster) for production, enabling the system to adapt its operating characteristics to different operational phases and resolve the contradiction between threading ease and production efficiency.
2Ease of operation
If opening and closing twisting unit is adopted to facilitate yarn threading, then yarn threading ease is improved, but machine size increases due to space requirements for disc movement
Solution Approach 1:
The patent applies the parameter changes principle by changing the rotation speed parameter of the discs rather than physically opening or closing the twisting unit structure. This allows yarn threading to be facilitated through parameter adjustment (speed reduction) without requiring additional space for structural movement, thereby resolving the contradiction between threading ease and machine compactness.
3Stability of the object's composition
If disc rotation speed is reduced for yarn threading, then yarn tension stability is improved, but production efficiency decreases
Solution Approach 1:
The patent applies the periodic action principle by implementing periodic switching between different rotation speeds corresponding to different operational phases. The disc rotation speed switching unit enables the system to alternate between a first rotation speed during yarn threading operations and a second rotation speed during production operations, allowing the system to achieve both yarn tension stability and high production efficiency at different times without compromise.
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
Facilitates easy yarn threading by stabilizing yarn tension, prevents disc damage, and maintains production efficiency by avoiding the need for additional space between discs, thus downsizing the machine.
Implementation Method 1
a disc-type twisting unit that includes a plurality of discs arranged in a spiral shape and that is configured to apply twists to a running yarn while making contact with the circumferential surface of each rotating disc
Data Source
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AI summary
A draw texturing machine 1 includes a plurality of spindles 25 each including a twisting unit 15, a plurality of twisting unit drive motors 56 individually provided for the twisting units 15 of the plurality of spindles 25, a control unit 60, and a plurality of switching buttons 95 individually provided for the twisting units 15 of the plurality of spindles 25. The twisting unit 15 has a plurality of disc units 51 each including a plurality of discs 55 and a rotation shaft 53 that rotates the plurality of discs 55. Each twisting unit drive motor 56 rotates the rotation shaft 53 of each disc unit 51 of the corresponding twisting unit 15. The control unit 60 controls each twisting unit drive motor 56. Each switching button 95 generates, by a manual operation, a switching signal for switching a rotation speed of each rotation shaft 53 driven by the corresponding twisting unit drive motor 56 at least between a first rotation speed that is a rotation speed at a time of producing the yarn Y and a second rotation speed that is a rotation speed slower than the first rotation speed, and transmits the switching signal to the control unit 60.