Adjustable Shingling Layout for Fast Sheet Format Changes
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Solution Overview
Problem
Existing roll-type cross-cutters face complexity in changing sheet formats, leading to system stoppages and inefficiencies due to the need for adjusting multiple components to maintain optimal sheet alignment and speed, which can result in material damage and increased energy consumption.
Innovation Solution
The shingling apparatus is designed to be adjustable in the transport direction based on the cut length, allowing the spacing between the shingling apparatus and braking apparatus to remain constant, eliminating the need for adjusting the braking apparatus during format changes and enabling invariant overlap length, thus simplifying the setup process and maintaining optimal sheet alignment across different formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the braking apparatus is made adjustable in the transport direction to maintain optimal sheet alignment during format changes, then the sheet alignment precision is improved, but the device complexity and setup time increase
Solution Approach 1:
Instead of making the braking apparatus adjustable to adapt to different sheet formats, the patent inverts the approach by making the shingling apparatus adjustable. The braking apparatus remains fixed while the shingling apparatus position varies according to the cut length, thereby solving the alignment precision problem without complicating the braking mechanism.
Solution Approach 2:
The patent introduces dynamic adjustability in the shingling apparatus position along the transport direction, allowing it to be adapted to different cut lengths. This dynamic configuration enables the system to maintain optimal sheet alignment across various formats while keeping the braking apparatus simple and fixed.
2Manufacturing precision
If multiple components are adjusted during format changes to maintain optimal sheet alignment, then the sheet alignment is improved, but the system stoppage time and productivity decrease
Solution Approach 1:
The patent extracts the adjustability requirement from the braking apparatus and concentrates it solely in the shingling apparatus. This isolation means that during format changes, only one component (the shingling apparatus) needs to be adjusted rather than multiple components, thereby reducing setup time and preventing unnecessary system stoppages.
3Manufacturing precision
If the braking apparatus is adjusted frequently during format changes, then the sheet alignment is maintained, but the energy consumption and material loading increase
Solution Approach 1:
The patent inverts which apparatus is adjusted: instead of adjusting the braking apparatus frequently during format changes, the shingling apparatus is made adjustable while the braking apparatus remains fixed. This reduces the frequency of adjustments and associated energy consumption.
4Adaptability or versatility
If the spacing between shingling apparatus and braking apparatus is made variable to accommodate different formats, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent applies the inversion principle by making the shingling apparatus adjustable in position rather than making the braking apparatus adjustable. This allows the spacing between the two apparatus to vary with different formats while keeping the braking apparatus simple and fixed, thereby achieving adaptability without increasing overall device complexity.
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 allows for straightforward format changes with minimal complexity, preventing adverse stoppages and ensuring energy-efficient operation by maintaining consistent transfer length and speed, reducing material loading and energy consumption, and preventing the cross-cutting apparatus from stopping in the cutting position.
Implementation Method 1
The suction belt revolves at a lower speed than the fast-running transport belts that transport the sheets onward from the cross-cutting apparatus. In this way, the sheet is braked.
Implementation Method 2
The sheets running through the shingling apparatus are, at a defined point of the sheets, in particular in relation to the rear edge of the sheets, raised relative to the transport plane by the raising shaft and pressed against the suction belt arranged thereabove.
Implementation Method 3
a braking apparatus which is situated downstream of the shingling apparatus in a transport direction of the sheets and which serves for braking shingled sheets, in particular by forming a braking gap for the passage of sheets
Data Source
AI summary
The invention relates to a device, in particular a roll cross-cutter, for forming a shingle stream of underlapping or overlapping sheets, in particular of paper or carton sheets, having a transport apparatus for transporting sheets, having a shingling apparatus for underlapping or overlapping sheets in regions, having a deceleration apparatus, downstream of the shingling apparatus in the transport direction of the sheets, for decelerating shingled sheets, in particular by forming a deceleration gap for the passage of shingled, combined sheets, and, preferably, having a cross-cutting apparatus upstream of the shingling apparatus for cutting a material web into individual sheets. According to the invention, the shingling apparatus is designed to be adjustable, in dependence of the cut length, in and/or opposite the transport direction of the sheets.