Substrate Supply Device Braking Control for Packaging Tube Production
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Solution Overview
Problem
Existing devices for feeding substrate strips wound onto rolls into packaging tube production processes suffer from significant substrate strip waste and frequent roll changes, especially at increasing production speeds, due to the need for controlled cutting and tension management during the unwinding and connection processes.
Innovation Solution
The implementation of braking means along the substrate strip conveying path between the connecting device and the intermediate store allows for adjustable conveying speed and tension control, using motorized braking rollers and sensors to maintain constant tension and minimize waste, enabling the use of more than two unwinding devices without increasing waste, and allowing roll changes only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple unwinding devices are used to reduce roll change frequency, then productivity is improved, but substrate strip waste increases due to controlled cutting requirements
Solution Approach 1:
The braking means are designed to be adjustable and controllable, allowing dynamic adaptation of braking force based on production speed and substrate tension requirements. This enables the system to optimize the use of substrate material from each roll while maintaining stable operation across varying production conditions, thereby reducing waste even when multiple rolls are used.
Solution Approach 2:
The system incorporates control means that monitor substrate strip tension and braking force, enabling closed-loop control. This feedback mechanism ensures that the braking force is precisely adjusted to maintain optimal substrate tension during unwinding, preventing both excessive waste and potential substrate damage, thus resolving the contradiction between extended production duration and material loss.
2Productivity
If production speed is increased to improve productivity, then output is improved, but substrate strip tension stability deteriorates requiring more frequent roll changes
Solution Approach 1:
The braking means are designed with adjustable braking force capability that can dynamically adapt to varying production speeds. At higher speeds, the system can apply appropriate braking force to maintain substrate tension stability, preventing the deterioration that would otherwise occur with speed increases. This allows sustained high-speed operation without frequent roll changes.
Solution Approach 2:
The system changes the braking force parameter in response to production speed variations. By adjusting this critical parameter, the system maintains optimal substrate tension across different operating speeds, resolving the contradiction between speed improvement and tension stability.
3Stability of the object's composition
If braking force is increased to maintain substrate tension at higher speeds, then tension stability is improved, but substrate strip damage risk increases
Solution Approach 1:
The control means continuously monitors substrate tension and adjusts braking force accordingly, preventing excessive braking that could cause damage. This feedback control ensures that sufficient braking force is applied to maintain tension stability while capping the maximum force to avoid substrate damage, thus resolving the contradiction between tension stability and damage risk.
Solution Approach 2:
The system dynamically adjusts the braking force parameter within safe limits, changing it to maintain tension stability while preventing values that would cause substrate damage. This controlled parameter adjustment resolves the contradiction by finding the optimal braking force range.
4Manufacturing precision
If roll changes are performed frequently to maintain production quality, then manufacturing precision is maintained, but loss of time increases due to operational interruptions
Solution Approach 1:
The adjustable braking means enable smooth transitions during roll changes by dynamically adapting braking force. This reduces the shock and tension variations that occur during roll exchanges, allowing longer intervals between roll changes without compromising production quality, thus reducing operational interruptions.
Solution Approach 2:
The system prepares for roll changes by gradually adjusting braking force and substrate tension before the actual roll exchange. This preliminary action ensures that when rolls are changed, production quality is maintained while minimizing disruption time, as the system is already in an optimal state for the transition.
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 significantly reduces substrate strip waste and minimizes roll changes by maintaining constant mechanical tension and optimizing the use of substrate strip material, allowing for continuous production with reduced operational interruptions.
Implementation Method 1
braking means along the substrate strip conveying path between the connecting device and the intermediate store allows for adjustable conveying speed and tension control
Data Source
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AI summary
The invention relates to a device for feeding substrate tapes (A', B', C', D'), in particular laminate tapes, wound onto rollers (A, B, C, D), into a packaging manufacturing process. According to the invention, continuous substrate tape brakes (5) are arranged in the continuous substrate conveying direction (F) between the connecting device (4) and the intermediate storage (6) to limit the conveying speed of the continuous substrate tape (E). These brakes can be controlled via the control means in a detachment operating state, in which the continuous substrate tape (E) is no longer connected to any of the rollers (A, B, C, D) arranged on the unwinding devices (A1, B1, C1, D1), such that the conveying speed of the continuous substrate tape (E) is adjustable.