Suction Nozzle and Eyelet for Automatic Thread Re-attachment
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Solution Overview
Problem
The existing method for re-attaching a thread end to a new thread in open-end rotor spinning machines is time-consuming and complex, requiring significant structural complexity and installation space due to the need for manual placement and transfer of the suction nozzle and thread end.
Innovation Solution
A method and device that uses a suction nozzle to extract the thread end from a bobbin, forming a loop with an eyelet and guiding it through an extraction port, allowing for automatic threading and simplifying the re-attachment process by moving the eyelet to position the thread for further treatment, such as separation and preparation for re-attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a swivel-mounted suction nozzle is used to extract thread end from bobbin, then the thread end can be captured and extracted, but the process becomes time-consuming due to required movements and transfers
Solution Approach 1:
The suction nozzle acts as an intermediary device that captures the thread end from the bobbin and transfers it to the eyelet, which then guides the thread through the extraction port. This intermediary mechanism enables reliable thread end capture while reducing the complexity and time of subsequent handling operations.
2Reliability
If the suction nozzle is swivel-mounted and subject to negative pressure, then the thread end can be sought out on the bobbin, but the structural complexity and installation space become considerable
Solution Approach 1:
The suction nozzle is designed to perform multiple functions: it swivels to track the bobbin rotation, captures the thread end through negative pressure, and transfers it to the eyelet. This multi-functional design reduces the need for separate dedicated components for each operation, thereby reducing overall system complexity and installation space.
3Reliability
If additional operations are performed to transfer the thread end to other devices, then the thread end can be prepared for re-attachment, but the process becomes more complex and time-consuming
Solution Approach 1:
The functions of thread end capture, transfer, and guidance are merged into a single integrated mechanism involving the suction nozzle and eyelet. The eyelet serves as a universal guide that directs the thread end through the extraction port and positions it for re-attachment, eliminating the need for multiple separate transfer operations to different devices.
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 approach simplifies and accelerates the re-attachment process by automating the handling of the thread, reducing errors and space requirements, and ensuring quick and reliable re-attachment of the thread end to a new thread.
Implementation Method 1
the thread is sucked in against its spooling direction through a suction nozzle into an extraction system
Data Source
AI summary
A system and associated operational method are provided to extract a thread by suction from a bobbin and for re-attachment of a thread end of the thread to a new thread. The thread is extracted from the bobbin by sucking the thread in against its spooling direction on the bobbin through a suction nozzle and into an extraction port of an extraction system. A loop is subsequently formed in the thread, and the thread is separated in the area of the loop. One thread end of the separated thread is discharged into an extraction port, and the other thread end coming from the bobbin is prepared for re-attachment to a new thread. Upon being extracted by suction into the extraction system, the thread is guided through an eyelet located in a run of the thread to the extraction port and the eyelet, together with the thread, is moved out of the run of the thread to the extraction port such that the thread forms the loop between the bobbin, the eyelet, and the extraction port.