Pressure Roller Unit Thread Guide for Textile Loop Separation
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Solution Overview
Problem
Existing textile machine systems face difficulties in safely separating the thread to be attached and the thread to be removed from a thread loop, often resulting in misalignment and entanglement, especially when using suction nozzles that are fixed at the work site.
Innovation Solution
A method involving a pressure roller unit with a cylindrical pressure roller and an integrated thread guide device, allowing the thread to be guided over the pressure roller for safe separation and reinsertion, along with a thread positioning element that maintains the thread in a constant position to prevent oscillation and tangling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed suction nozzle is used at the work site to form a thread loop, then the thread loop can be formed, but the piece of thread to be attached and the piece of thread to be removed cannot be safely separated and inserted into working elements
Solution Approach 1:
The suction nozzle is made movable relative to the work station, allowing it to pivot between a retracted position and a working position. This dynamic positioning enables the nozzle to approach the thread loop for separation and then retract, allowing the separated thread pieces to be inserted into working elements without obstruction.
Solution Approach 2:
The thread loop is separated into two distinct pieces: a piece of thread to be attached and a piece of thread to be removed. The suction nozzle is used to selectively grasp and separate these pieces at different locations, enabling independent handling and insertion of each piece into appropriate working elements.
2Reliability
If the suction nozzle is moved to separate thread pieces, then separation can be achieved, but the nozzle cannot be used for fixed arrangement at the work site
Solution Approach 1:
The suction nozzle is designed with movable mounting that allows it to pivot between a retracted position (away from the work area) and a working position (close to the thread loop). This dynamic positioning provides both the flexibility needed for reliable thread separation and the adaptability to maintain a fixed arrangement at the work site during operation.
3Reliability
If thread guide device is arranged away from pressure roller, then thread can be guided, but adjustment work is required and thread may get caught on organs
Solution Approach 1:
The thread guide device is merged with the pressure roller unit, forming an integrated assembly where the thread guide is positioned directly at the pressure roller location. This integration eliminates the need for separate adjustment mechanisms, reduces the risk of thread entanglement, and simplifies the overall device structure while maintaining reliable thread guidance.
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
Ensures reliable separation and reinsertion of threads, reducing the need for adjustments and preventing thread entanglement, thereby enhancing the efficiency of the textile machine's operation.
Implementation Method 1
a thread is taken up from a bobbin by means of a suction nozzle
Implementation Method 2
at least one of the thread pieces, in particular the thread piece to be attached, is guided over at least one thread guide device arranged on a pressure roller unit of the work site during formation of the thread loop
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
In a method for forming a yarn loop and separating a yarn segment (4b) to be applied and a yarn segment (4c) to be discharged from the yarn loop at a work station (2) of a textile machine (1), a yarn (4) is picked up from a spool (7) by means of a suction nozzle (8), the yarn loop is formed from the yarn (4), and the yarn segment (4b) to be applied and the yarn segment (4c) to be discharged are separated from each other by means of at least one yarn guiding device (15) located at the work station. To separate the yarn segments (4b, 4c), at least one of the yarn segments (4b, 4c) is guided over at least one yarn guiding device (15) arranged on a pressure roller unit (16) of the work station (2). A pressure roller unit (16) for a take-off device of a work station (2) of a textile machine (1) with a roller-shaped pressure roller (5) rotatably mounted on a rotary axis (20) is provided with at least one thread guiding device (15).A suction nozzle (8) for a work station of a textile machine with a suction opening (11), with a suction channel (9) has a thread positioning element (17) which is arranged inside the suction channel (9) and is adjustable between a rest position (RP) and a working position (AP).