Gripper Tube Shielding in Spooling Machines
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Solution Overview
Problem
Winding machines face issues with thread entanglement around the gripper tube or its flap due to sudden thread tension changes after a break or cut, leading to unreliable thread detection and potential machine standstill, requiring manual intervention.
Innovation Solution
Positioning the gripper tube below a thread guide plate during normal operation to shield it from the thread, ensuring the thread falls on the plate rather than wrapping around the gripper tube, and using a control cam to manage the gripper tube flap's opening for efficient suction, with the gripper tube flap being at least partially open to catch falling threads and prevent entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gripper tube is positioned at a greater distance from the running thread during normal winding operation, then the thread should not wind around the gripper tube or gripper tube flap after a break or cut, but fall past the gripper tube, but it has been shown that after a break or cut, the thread often does not remain in its regular course, but can move uncontrollably due to the thread tension, which is suddenly relieved, and the distance from the regular yarn path therefore does not offer sufficient protection against entanglement of the rapier tube or the rapier tube flap
Solution Approach 1:
A thread guide plate is introduced as an intermediary element between the running thread and the gripper tube. The thread guide plate serves as a mediator that redirects the thread path, ensuring that the thread runs along the plate's upper side rather than having direct access to the gripper tube opening. This intermediary structure effectively blocks the thread from wrapping around the gripper tube while maintaining reliable thread detection capabilities.
2Reliability
If the gripper tube flap is closed to clamp the thread for safe transfer to the splicing device, then the thread can be securely held, but the gripper tube flap may become entangled by the thread after a break or cut
Solution Approach 1:
The thread guide plate acts as a protective intermediary that shields the gripper tube flap from direct thread contact during normal operation. By positioning the thread guide plate such that the thread runs along its upper side, the plate prevents the thread from reaching and entangling the gripper tube flap, while still allowing the flap to function properly for thread clamping and transfer when needed.
3Measurement precision
If the gripper tube is positioned closer to the thread path to improve thread detection, then thread detection reliability improves, but the likelihood of thread wrapping around the gripper tube increases
Solution Approach 1:
The thread guide plate serves as a protective intermediary that allows the gripper tube to be positioned close to the thread path for improved detection precision, while the plate itself blocks the thread from wrapping around the gripper tube. The thread runs along the upper side of the guide plate, maintaining a safe distance from the gripper tube opening even when the gripper tube is positioned close to the thread path.
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
Significantly reduces the likelihood of thread entanglement, enabling reliable thread detection and automatic splicing connections, reducing the need for manual intervention and potentially eliminating the need for separate dedusting devices.
Implementation Method 1
a gripper tube acted upon by suction air, which is pivotally mounted and designed for functionally correct positioning of the thread assigned to it
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The method involves positioning of a gripping pipe (8) below a thread guiding plate (63) during the spooling operation. The thread guiding device is arranged in a grain. The thread side end of the gripping pipe with a gripping tube flap (64) is covered completely by the thread guiding plate. An independent claim is included for a working position of a spooling machine with a thread connecting unit and a controlling device.