Draw Texturing Machine Pin Control for Yarn Breakage
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Solution Overview
Problem
In draw texturing machines with pin-type twisting units, yarn breakage occurs due to sudden stoppages and restarts, leading to increased operational downtime and manual intervention, especially when operations are resumed without proper yarn management.
Innovation Solution
Implementing a control unit that allows for a simultaneous drive mode where pin-type twisting units are independently driven, enabling them to resume operation without cutting yarns, and gradually accelerating from a low rotation number to the production rotation number to prevent yarn breakage, with a winding device replacing yarn packages once the production rotation is stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pin-type twisting units are independently driven with automatic stop on yarn breakage, then operator burden is reduced, but yarn breakage occurs during resumption due to delayed pin activation
Solution Approach 1:
The control unit preliminarily activates the pin-type twisting unit before the feed rollers start operating after resumption. This preliminary action ensures the pin is already rotating when yarn feeding begins, preventing yarn breakage while maintaining independent operation capability that reduces operator burden.
Solution Approach 2:
The control unit receives operation stop/resumption signals and automatically controls the activation state of pin-type twisting units based on this feedback. When resumption is detected, the control unit automatically activates the pins without operator intervention, solving both the operator burden and yarn breakage problems.
2Reliability
If yarn threading is performed manually one by one, then yarn breakage is avoided, but operational downtime increases significantly
Solution Approach 1:
The system performs self-service by automatically controlling the activation of pin-type twisting units through the control unit when resumption is detected. This eliminates the need for manual operator intervention in yarn threading and pin activation, significantly reducing operational downtime while maintaining yarn breakage prevention through controlled sequential activation.
Solution Approach 2:
The control unit maintains continuous control over the pin-type twisting units, automatically activating them when resumption is detected. This continuous automated control eliminates interruptions caused by manual threading operations, maintaining productivity while preventing yarn breakage through proper activation sequencing.
3Reliability
If pin-type twisting units are activated immediately after yarn threading, then yarn breakage is prevented, but operational complexity increases
Solution Approach 1:
The control function for activating pin-type twisting units is extracted from manual operator actions and transferred to an automated control unit. This extraction simplifies the overall operation by removing complex manual coordination tasks while maintaining reliable yarn breakage prevention through automated timing control.
Solution Approach 2:
Manual mechanical activation of pins by operators is replaced with an automated control system that electronically manages pin activation timing. This substitution reduces operational complexity while ensuring pins are activated at the optimal moment to prevent yarn breakage, replacing complex human coordination with simple automated control logic.
Data Source
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AI summary
An object of the present invention is to save time required for resumption of operation and to suppress occurrence of yarn breakage, in a draw texturing machine in which a pin-type twisting unit of each processing unit can be independently driven. In a draw texturing machine 1, processing units 10 are aligned. The processing units 10 respectively include pin-type twisting units 15. The pin-type twisting units 15 are configured to respectively twist yarns Y running in rotating pins, and are able to be independently driven. The draw texturing machine 1 includes a control unit 30 which controls operations of the processing units 10. The control unit 30 is configured not to cut each of the yarns Y running in the processing units 10 at the time of operation stop of the processing units 10, and able to execute a simultaneous drive mode in which, at the time of resumption of operations of the processing units 10, the pin-type twisting units 15 of all of the processing units 10 are simultaneously driven.