Prestressed Spring Pressure Roller for Textile Take-Off
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Solution Overview
Problem
Existing textile machine take-off devices require continuous energy to maintain pressure roller contact with the take-off roller, leading to inefficiencies and potential thread damage during the lifting and resetting process, especially in machines with individual workstation automation.
Innovation Solution
A take-off device utilizing a prestressed spring element to maintain contact pressure, combined with an actuating device that allows precise control and energy-efficient operation, enabling the pressure roller to be reliably pressed against the take-off roller without continuous compressed air or electricity, and allowing for adjustable contact pressure settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure roller is pressed against the take-off roller by continuous compressed air or electricity, then the contact pressure is maintained, but the energy consumption increases
Solution Approach 1:
The patent applies periodic action by using a spring element that is periodically loaded and released. The actuating device loads the spring element only when needed (during piecing operations), rather than maintaining continuous pressure. This converts continuous energy consumption into periodic energy input, significantly reducing overall energy usage while maintaining reliable contact pressure during critical operations.
Solution Approach 2:
The spring element serves itself by maintaining contact pressure between the pressure roller and take-off roller without requiring continuous external energy input. Once the spring is loaded by the actuating device, it automatically maintains the pressing force through its elastic properties, eliminating the need for continuous compressed air or electrical power during normal operation.
2Ease of operation
If the pressure roller is lifted off the take-off roller during piecing, then the thread can be handled, but the thread may be damaged by harmful effects
Solution Approach 1:
The spring element provides beforehand cushioning by being pre-loaded to a controlled extent. When the pressure roller needs to be lifted for piecing operations, the spring's controlled elasticity ensures gentle engagement and disengagement, preventing sudden impacts or excessive forces that could damage the thread. The cushioning effect is built into the system before the piecing operation occurs.
Solution Approach 2:
The actuating device controls the loading parameter of the spring element to optimize the pressing force. By adjusting the extent to which the spring is pre-loaded, the system can modify the contact pressure parameters to achieve gentle thread handling during piecing while maintaining adequate pressure during normal operation, thus preventing thread damage.
3Adaptability or versatility
If the contact pressure is adjusted by changing air pressure levels, then the pressing force can be changed, but the system complexity increases
Solution Approach 1:
The patent replaces the complex pneumatic control system (requiring compressed air pressure regulation) with a simpler mechanical spring-loaded system. The spring element provides inherent mechanical advantage and elasticity, allowing pressing force adjustment through simple mechanical means rather than complex pneumatic control, thereby reducing system complexity while maintaining adaptability.
Solution Approach 2:
The actuating device changes the physical state of the spring element by controlling its loading parameter. Instead of adjusting air pressure levels, the system modifies the mechanical configuration by varying the extent to which the spring is pre-loaded, achieving pressing force adjustment through a single parameter change in a simpler mechanical system.
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 energy-saving operation, consistent contact pressure, and reliable thread take-off across multiple workstations, independent of roller wear, ensuring high-quality yarn production without the need for continuous energy input.
Implementation Method 1
the pressure roller is pressed against the take-off roller in its working position by a prestressed spring element
Implementation Method 2
An actuating device with an electromagnet is provided for lifting the pressure roller
Data Source
Figure 1
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Figure 4
AI summary
In a method for pressing a pressure roller (10) against a take-up roller (9) of a work station (2) of a textile machine, the pressure roller (10) can be moved by means of an actuating device (11) of the work station (2) from a working position, in which it is pressed against the take-up roller (9), to a spinning position (II), in which it is lifted from the take-up roller (9), and back again. In its working position, the pressure roller (10) is pressed against the take-up roller (9) by a pre-tensioned spring element (12). A take-up device (3) for a work station (2) of a textile machine (1) comprises a take-up roller (9), a pressure roller (10) that can be pressed against the take-up roller (9), and an actuating device (11). By means of the actuating device (11) the printing roller (10) can be moved from a working position, in which it is pressed against the take-off roller (9), to a spinning position (II), in which it is lifted from the take-off roller (9), and back again.The trigger device (3) has a pre-tensionable spring element (12) for pressing the pressure roller (10) against the trigger roller (9).