Air-Jet Spinning Workstation Yarn Resumption Guide Channel
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Solution Overview
Problem
The variability in the position of the spinning-in end of yarn during the preparation for resumption of the spinning process leads to uniformity issues in piecing parameters, and existing methods require manual intervention or controlled stopping, which can be inefficient and inaccessible to operators.
Innovation Solution
A method for preparing a workstation on an air-jet spinning machine that ensures the spinning-in end of yarn is placed in a defined position using a guide channel and underpressure yarn storage, allowing for controlled unwinding and formation of a sufficient length of yarn, enabling uniform piecing parameters and easy operator access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the spinning-in end of yarn is formed by existing methods, then the yarn can be prepared for resumption, but the position of the spinning-in end varies leading to non-uniform piecing parameters
Solution Approach 1:
A guide channel is introduced as an intermediary component to define and standardize the position of the spinning-in end of yarn. The guide channel acts as a mediator between the yarn path and the spinning nozzle, ensuring that the yarn end is consistently positioned at a defined location regardless of variations in the spinning process or manual handling, thereby achieving uniform piecing parameters while maintaining operator accessibility.
2Productivity
If manual intervention is used to prepare the workstation for resumption, then the spinning process can be resumed, but the process is inefficient and time-consuming
Solution Approach 1:
The workstation is designed to automatically prepare itself for resumption of the spinning process. The guide channel and underpressure yarn storage device work together to automatically position the yarn end and form the spinning-in end without requiring manual intervention. The system self-regulates the yarn path and positioning, eliminating the need for operators to manually handle the yarn during resumption, thereby improving productivity while keeping the device complexity manageable.
Solution Approach 2:
The yarn is pre-positioned in the guide channel and the spinning-in end is formed in advance before resumption is needed. The underpressure yarn storage device maintains the yarn in a ready state, and the guide channel pre-defines the yarn path, so that when resumption is required, the workstation is already prepared and can resume immediately without time-consuming manual operations.
3Length of moving object
If the yarn is stored under pressure in the guide channel, then a sufficient length of yarn can be maintained, but the yarn path must be precisely controlled
Solution Approach 1:
The mechanical control of yarn path is replaced by using underpressure (a pneumatic field) to store and manage the yarn in the guide channel. Instead of relying solely on mechanical positioning mechanisms to maintain yarn length and position, the underpressure system creates a controlled environment where the yarn is held in place by pressure differentials, allowing sufficient yarn length to be maintained while simplifying the precision control requirements compared to purely mechanical systems.
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 method guarantees a defined spinning-in end position, enhancing the uniformity of piecing parameters and allowing for easy operator access, while ensuring a sufficient yarn length for efficient spinning-in process resumption.
Implementation Method 1
formation of yarn reserve in an underpressure yarn storage device between the spinning nozzle and the winding device of yarn is started
Data Source
Figure 1
AI summary
The invention relates to a method for preparing a workstation for the resumption of the spinning process on an air-jet spinning machine, in which after an interruption of spinning, the yarn (5) is guided back into its working path behind a spinning nozzle (4), or the yarn (5) is stopped in controlled manner in its working path with the end of yarn (5) situated behind the spinning nozzle (4), the end of yarn (5) is introduced into an outlet opening (41) of the spinning nozzle (4), whereupon the yarn (5) is transported by the reverse motion with the aid of the spinning nozzle (4) and a feeding device (3) of fibers as far as to a guide channel (2) in front of the spinning nozzle (4), whereupon a spinning-in end of yarn (5) is formed on the yarn (5) in the guide channel (2) and simultaneously the formation of yarn reserve is started in an underpressure yarn storage device (73) in front of a winding device (9) of yarn (5). The reverse motion of the yarn (5) to the guide channel (2) is performed by the reverse motion of a drawing-off mechanism (6) of yarn (5) of the workstation. The invention also relates to an air-jet spinning machine with means for preparing a workstation for the resumption of the spinning process, whereby each workstation of the air-jet spinning machine comprises a drafting mechanism (1) of sliver (0), which is with its outlet (11) aligned with an inlet (30) of a feeding device (3) of fibers, which is with its outlet (31) aligned with an entry (40) of fibers to the spinning nozzle (4), whereby the space between the outlet (11) of the drafting mechanism (1) of sliver (0) of fibers and the inlet (30) of the feeding device (3) of sliver (0) is aligned with an exit portion (22) of a guide channel (2), which is at a certain distance from its exit portion (22) provided with a device (20) for the preparation of the spinning-in end of yarn and the workstation is provided with means for the unwinding of the yarn (5) against the direction in which the yarn (5) moves upon its formation. The workstation is provided with means for controlled reverse displacement of the formed spinning-in end of yarn (5) through the guide channel (2) to a defined position behind the device (20) for the preparation of the spinning-in end of yarn.