Winding Device Reel Change Speed Control
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Solution Overview
Problem
Existing winding devices face issues with maintaining the rotational speed of an empty reel during the reel change process, leading to potential loss of quality in the pre-winding process due to the reel rotating freely during feeding to the contact roller.
Innovation Solution
The device simultaneously applies rotational driving and feeding mechanisms to the empty reel, using power transmission means like a gearwheel and sprocket chain or toothed belt to maintain controlled rotation, and includes a retaining element with an actuator for precise control and a sensor to interrupt the drive before contact, ensuring the reel's circumferential speed matches the contact roller's.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the still empty reel is fed to the contact roller by a feeding device, then the reel can be positioned for pre-winding, but the reel rotates freely during feeding causing its rotational speed to slow down and become significantly less than the contact roller's speed
Solution Approach 1:
The patent combines the feeding device and rotational drive into a single integrated unit. The drive unit remains engaged with the reel shaft throughout the entire feeding process, eliminating the gap where the reel would otherwise rotate freely. This merging ensures continuous speed control and prevents the speed loss that occurs when the reel is fed without active driving.
Solution Approach 2:
The rotational drive is activated before the feeding process begins and remains engaged throughout. This preliminary action ensures the reel is already rotating at the correct speed before contact with the contact roller, preventing the speed reduction that would otherwise occur during the feeding phase.
2Speed
If the still empty reel is driven in rotation by a separate drive mechanism, then the circumferential speed can be controlled, but the drive must be disengaged during feeding causing the reel to rotate freely
Solution Approach 1:
The patent merges the drive mechanism and feeding mechanism into a single integrated unit that performs both functions simultaneously. The drive unit remains engaged with the reel shaft throughout the feeding process, eliminating the need for disengagement and re-engagement operations. This integration reduces mechanical complexity by eliminating separate engagement mechanisms while maintaining speed control.
3Ease of operation
If the feeding process takes a relatively long time, then the reel can be properly positioned, but the rotational motion of the reel slows down significantly
Solution Approach 1:
The rotational drive is activated and engaged before the feeding process begins, ensuring the reel is already rotating at the correct speed. The drive remains engaged throughout the entire feeding duration, maintaining constant speed control regardless of how long the feeding process takes to position the reel accurately.
Solution Approach 2:
The drive mechanism maintains continuous engagement with the reel shaft throughout the feeding process, ensuring uninterrupted rotational motion. This continuous action prevents speed fluctuations and maintains the reel's rotational speed at the required level throughout the entire positioning operation.
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 ensures consistent and high-quality pre-winding by maintaining controlled rotational speed of the empty reel during the reel change process, preventing speed reduction and maintaining the conditions necessary for proper pre-winding.
Implementation Method 1
power transmission means, which act on a gearwheel, which is arranged on the reel shaft of the reel
Implementation Method 2
power transmission means like a gearwheel and sprocket chain or toothed belt
Data Source
AI summary
A winding device for winding a web-shaped material, preferably a plastic film, has a reel for receiving the web-shaped material, a contact roller for feeding and pressing the web-shaped material against the reel, a device for rotationally driving a still empty reel, and a device for feeding the still empty reel to the contact roller. The device for rotationally driving the still empty reel and the device for feeding the still empty reel to the contact roller can act simultaneously on the still empty reel.