Cladded Yarn Drafting Unit with Feedback Control
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Solution Overview
Problem
Existing devices for producing cladded yarn on ring spinning machines lack sufficient control over the process, resulting in inconsistent quality and do not allow for dense spindle arrangement, making it difficult to manage the addition of cladding yarn effectively.
Innovation Solution
A device with a drafting unit featuring multiple rollers of different speeds, a draft control device to adjust the cladding yarn, and a monitoring system to ensure consistent supply, allowing for precise integration of the cladding yarn around the spun yarn, with adjustable components for flexible operation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If prior art devices are used for producing cladded yarn on ring spinning machines, then the basic spinning function is achieved, but the process control is insufficient resulting in inconsistent quality
Solution Approach 1:
The patent implements a feedback control system where sensors detect the position and tension of the cladding yarn, and this information is fed back to control the drafting rollers and delivery mechanism. This ensures consistent cladding yarn quality by automatically adjusting process parameters based on real-time measurements, resolving the contradiction between quality consistency and device complexity.
Solution Approach 2:
The patent employs adjustable drafting ratios and roller speeds that can be precisely controlled and modified. By changing these parameters dynamically, the system achieves consistent cladded yarn quality while maintaining flexibility in production, addressing the quality consistency issue without requiring overly complex fixed mechanisms.
2Productivity
If prior art devices are used for producing cladded yarn, then the spinning function is achieved, but the spindles cannot be arranged in a dense manner
Solution Approach 1:
The patent utilizes vertical space by arranging creels and drafting units in multiple levels and tiers. Instead of only horizontal expansion, the system stacks components vertically, allowing spindles to be densely packed in the horizontal plane while maintaining adequate operational space through multi-level configuration, thus increasing spindle density without proportionally increasing machine footprint.
Solution Approach 2:
The patent integrates the cladding yarn delivery system within the existing spindle structure by positioning delivery rollers and guides in nested arrangements around the spindle axis. This nested configuration allows multiple functional elements to occupy overlapping spatial volumes, enabling denser spindle arrangement while maintaining all necessary functions.
3Reliability
If prior art devices are used for adding cladding yarn, then the cladding function is achieved, but the process cannot be controlled sufficiently
Solution Approach 1:
The patent incorporates sensors that continuously monitor the cladding yarn tension, position, and speed, feeding this information back to the control system. This feedback mechanism ensures reliable cladding process control by automatically detecting and correcting deviations, achieving high reliability without requiring excessively complex manual control systems.
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with automated electronic control systems that use motors and actuators to precisely control roller speeds and yarn tension. This substitution improves cladding process reliability through precise electronic control while reducing the complexity of manual mechanical adjustments.
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
This solution enables precise control over the cladding process, improving yarn quality and allowing for a more efficient and space-saving arrangement of spindles, ensuring consistent and high-quality cladded yarn production.
Implementation Method 1
a drafting unit with several drafting rollers rotating with different rotational speed. Thereby, the fibers of a roving, which passes through the drafting unit, are drawn in a defined manner
Implementation Method 2
spun in a conventional manner to a yarn by a traveler revolving around the spindle
Data Source
Figure 1~4
Figure 5~6
Figure 7~8
AI summary
The invention is directed to a device (1) and a method for making of cladded yarn (9) on a ring spinning frame. The device (1) comprises a first creel (10) foreseen to hold at least one bobbin of roving (8), a second creel (12) foreseen to hold at least one bobbin of cladding yarn (13) and a draft control device (15) suitable to adjust the draft of the cladding yarn (13) before entering the spinning process. Furthermore, the device (1) comprises a monitoring device (22) to monitor the presence of the cladding yarn (13) and to interrupt the supply of the roving (7) to a related drafting unit (2) if the cladding yarn (13) is not present. The cladding yarn (13) is introduced into the spinning process by an injector (27).