Yarn End Deposition Outside Standard Package Profile
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Solution Overview
Problem
Existing methods for depositing a yarn end on a bobbin in a defined manner are complex and require special elements or service robots, leading to inefficiencies and increased working time, as they often do not utilize the means of the workstation effectively.
Innovation Solution
A method where the yarn end is detected by an attending device and deposited on a tube outside the standard package profile using a workstation's existing means, with a reciprocating yarn guide and rectifying means to ensure accurate placement, maximizing the use of the workstation and simplifying the design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a service robot is used to deposit yarn end on bobbin, then the yarn end can be deposited outside the standard package profile, but the device complexity increases and working time is considerably increased
Solution Approach 1:
The workstation performs the yarn end deposition operation using its own existing means (winding device and yarn guide) rather than relying on an external service robot. The workstation detects the yarn end and executes the deposition sequence autonomously, making the system self-sufficient and eliminating the need for complex service robot equipment.
Solution Approach 2:
The existing winding device and yarn guide at the workstation are made to perform multiple functions: both the standard yarn winding operation and the specialized yarn end deposition operation. By programming the yarn guide to move to specific positions and control the winding device appropriately, the same equipment handles both routine winding and the special task of depositing yarn ends outside the package profile.
2Manufacturing precision
If a service robot performs yarn end deposition, then defined placement is achieved, but the productivity decreases due to considerable use of working time
Solution Approach 1:
The yarn end deposition operation is integrated into the continuous working cycle of the spinning and winding machine. The workstation performs detection, yarn guide movement, and deposition in a seamless sequence without interrupting the overall production flow. The yarn guide moves to the deposition position and returns during appropriate phases of the winding cycle, maintaining continuous productive action.
Solution Approach 2:
The yarn guide is moved to the deposition position in advance before the actual yarn end deposition occurs. The workstation detects the yarn end position first, calculates the appropriate deposition location outside the standard package profile, and positions the yarn guide accordingly, so that when the yarn end needs to be deposited, the equipment is already in the correct position to execute the operation quickly.
3Manufacturing precision
If special elements are used for yarn end deposition, then the yarn end can be deposited outside the standard package, but the ease of manufacture decreases
Solution Approach 1:
The yarn guide is designed with dynamic positioning capability, allowing it to move to different positions along the bobbin width. Instead of requiring separate fixed equipment for different operations, the yarn guide can be programmatically positioned to perform both standard winding within the package profile and specialized deposition outside the profile, simplifying the overall design by eliminating the need for multiple static components.
Data Source
Figure 1~2
AI summary
The invention relates to a method for depositing a yarn (5) end (50) on a bobbin (90) in a defined manner when winding yarn (5) on a bobbin (90) at a workstation of a spinning and winding machine, in which the yarn (5) end (50) is wound on the bobbin (90), on which prior to being deposited on a tube in a defined manner outside the profile (P) of a standard package of yarn (5), the yarn end is detected by the means of an attending device. After being detected on the bobbin (90), the yarn (5) is passed to the means of a workstation, with the aid of which the yarn (5) is subsequently deposited on the tube outside the profile (P) of the standard package of the yarn (5). The invention also relates to a device for depositing a yarn (5) end (50) on a bobbin (90) in a defined manner during winding yarn on a bobbin (90) at a workstation of a spinning and winding machine, which comprises a yarn (5) guide (92) of a traversing device of yarn (5), mounted so as to be movable reciprocatingly along the width of the bobbin (90). The yarn (5) guide (92) is reciprocatingly movable in a controlled manner to the area outside the profile P of the standard package on the bobbin (90).