Movable Suction Port for Thread End Detection
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Solution Overview
Problem
Existing thread search devices for cross-wound bobbins in textile machines require significant space due to the need to move the entire suction nozzle, which can be cumbersome and inefficient.
Innovation Solution
A method where a stationary suction nozzle with a movably arranged suction port is used, allowing the suction port to change distance from the cross-wound bobbin to locate and stretch the thread end, reducing space requirements by only moving the suction port relative to the bobbin, and incorporating a thread handling element for further processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire suction nozzle is moved to locate the thread end, then the thread end can be detected and located, but the space required and device complexity increase significantly
Solution Approach 1:
The suction nozzle is divided into a stationary body and a movable suction opening (or movable suction tube portion). Only the suction opening or the suction tube needs to move, not the entire nozzle assembly. This segmentation reduces the space required for movement while maintaining thread end detection capability.
Solution Approach 2:
The movable component (suction opening or suction tube) is extracted from the stationary suction nozzle body. This allows the critical functional element to move independently with minimal space requirements, while the main nozzle structure remains fixed.
2Ease of operation
If a movable suction nozzle is used to locate the thread end, then the thread can be detected and tensioned, but the device complexity and space requirements increase
Solution Approach 1:
By segmenting the suction nozzle into stationary and movable parts, the complexity of moving the entire nozzle is reduced to moving only the suction opening or tube, simplifying the overall mechanism while maintaining operational capability.
Solution Approach 2:
The suction opening movement mechanism is integrated into the suction nozzle structure itself, allowing the system to perform the movement function with minimal external complexity. The movable suction opening can be actuated by simple mechanisms inherent to the nozzle design.
3Measurement precision
If the suction nozzle is positioned close to the cross-wound bobbin for thread detection, then precise thread end location is achieved, but interference with other machine parts increases
Solution Approach 1:
The segmented design allows only the suction opening to be positioned close to the bobbin for precise detection, while the main nozzle body remains in a position that does not interfere with other machine parts. This spatial separation reduces harmful interference.
Solution Approach 2:
The movable suction opening can extend in a specific dimension (toward the bobbin) independently of the nozzle body position, allowing precise approach to the thread end without the entire nozzle interfering with other machine components in different spatial dimensions.
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 design minimizes space usage, allows precise thread end location, and automates the sequence from search to processing, being gentle on the thread and reducing interference with other machine parts.
Implementation Method 1
If a yarn end needs to be located on the cross-wound bobbin, a suction nozzle is pressurized with a vacuum, and the yarn end is drawn into the suction nozzle through a suction opening
Data Source
Figure 1a~1b
Figure 1c~2a
Figure 2b~2c
AI summary
The present invention relates to a method for handling a thread end (10) of a cross-wound bobbin (2) at a winding station (1) of a cross-wound bobbin production textile machine, wherein the cross-wound bobbin can be held and driven in a bobbin holder (3), a thread (6) is laid crosswise on the cross-wound bobbin by means of a changing device (5), and a suction nozzle (7; 12) is subjected to a vacuum, and the thread end is drawn into the suction nozzle through a suction opening (8; 13). According to the invention, it is proposed that the suction opening be moved relative to the suction nozzle so that the distance between the suction opening and the cross-wound bobbin is changed in order to locate the thread end and/or to be able to stretch it between the suction opening and the cross-wound bobbin, and that the stretched thread is moved to a unit (9) of the textile machine for further processing.Furthermore, the invention relates to a winding station of a textile machine producing cross-wound bobbins (2) with a bobbin holder (3), a changing device (5) and a suction nozzle (7; 12) that can be pressurized with negative pressure, with a suction opening (8; 13) movably arranged on the suction nozzle in order to locate a thread end (10) and/or to be able to stretch it between the suction opening and the cross-wound bobbin, and with a thread handling element (8; 13; 16; 18) in order to be able to move the stretched thread (6) to a unit (9) of the textile machine for further processing.