Yarn End Handling Device for Ring Spinning Machines
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Solution Overview
Problem
Existing yarn end handling devices for ring spinning machines are cumbersome, unreliable, and inefficient due to limited space and high demands for reliability and simplicity, particularly in resuming yarn production after interruptions.
Innovation Solution
A lightweight, efficient yarn end handling device with a suction tube mounted on a positioning system, featuring a vertical guide, horizontal arm, and drives for linear and swinging motions, allowing precise control and movement of the suction tube to guide the yarn end back to the drafting arrangement, coupled with a mechanical yarn gripping and cutting device for seamless integration with the spinning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If general motion handling devices are used for yarn end manipulation, then the yarn end can be moved from the bobbin to the drafting arrangement, but the device becomes cumbersome and unreliable due to limited space
Solution Approach 1:
The handling device is segmented into three independent motion components: vertical linear movement (supporting part on vertical guide), horizontal swinging movement (horizontal arm on supporting part), and horizontal linear movement (suction tube on horizontal arm). This segmentation allows each component to perform a specific function within the limited space, avoiding the need for a single complex general-purpose mechanism.
Solution Approach 2:
The device employs a nested structure where the suction tube is mounted on the horizontal arm, which is mounted on the supporting part, which in turn is mounted on the vertical guide. This nested arrangement compactly packs multiple degrees of freedom within the limited space at the spinning station, reducing overall device complexity while maintaining full handling capability.
2Productivity
If multiple service operations are performed during permanent reversible vertical motion of ring bench, then yarn production can be resumed, but the handling device must be highly reliable and simple
Solution Approach 1:
The device is designed to operate dynamically during the permanent reversible vertical motion of the ring bench. The supporting part moves vertically linearly to follow the ring bench motion, while the horizontal arm and suction tube perform horizontal positioning operations. This dynamic design allows yarn end handling to be performed concurrently with the ongoing spinning cycle, enabling quick resumption without interrupting productivity.
Solution Approach 2:
The device leverages the existing permanent reversible vertical motion of the ring bench as part of its operation. Rather than requiring the ring bench to stop or the device to independently generate vertical motion, the handling mechanism adapts to and utilizes the self-service vertical motion already present in the spinning system, simplifying the handling device while maintaining high reliability.
3Area of stationary object
If compact space is utilized at spinning station with 70-75 mm spacing, then the device can be installed, but the dimensions and movability are considerably limited
Solution Approach 1:
The device utilizes three-dimensional space efficiently by distributing motion across multiple dimensions: vertical dimension (supporting part on vertical guide), horizontal swinging arc (horizontal arm), and horizontal linear dimension (suction tube on horizontal arm). This multi-dimensional approach allows the device to achieve the necessary range of motion within the constrained 70-75 mm spacing by exploiting spatial freedom in different directions rather than requiring excessive length in a single direction.
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 device ensures reliable, efficient, and space-efficient yarn end handling, enabling quick resumption of spinning with reduced wear and tear on components, while avoiding contact with other machinery, thus improving operational speed and durability.
Implementation Method 1
a suction tube with a suction mouth assignable to the spinning station, the suction tube being connected to a vacuum source
Data Source
Figure 1
AI summary
The invention relates to a yarn end (40) handling device at a spinning station of a ring spinning machine for detecting a yarn end (40) on a bobbin, which comprises a suction tube (9) with a suction mouth (90) assignable to a spinning station, the suction tube (9) is connected to a vacuum source, whereby the suction tube (9) is mounted on a positioning system for guiding the mouth (90) of the suction tube (9) to a drafting arrangement of the spinning station for the resumption of the spinning process. The positioning system includes a supporting part (5), which is mounted reversibly linearly slidably on a vertical guide (6); a horizontal arm (7), which is mounted reversibly swingingly (swivelly) about the vertical axis (R) on the supporting part (5), whereby the suction tube (9) is mounted reversibly linearly slidably in the horizontal direction (C+, C-) on the horizontal arm (7). The invention further relates to a method for handling a yarn end (40) and it also relates to a ring spinning machine.