Cardboard Container Folding With Mobile Pressing Surface for Lid Alignment
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Solution Overview
Problem
Existing forming devices for cardboard containers face challenges in aligning the distal edge of the lid with the edge corner of the tab during folding, leading to twisting and deformation, especially when folding is performed above the point of gravity, which affects the rectangular parallelepipedal shape and stability of stacked containers.
Innovation Solution
A forming device with folding-over means that include a mobile, longitudinally extending pressing surface, such as an endless belt, that accompanies the movement of the cardboard sheet to align and fold the lid over the tab without causing jolts or deformations, using synchronized motorization and controlled angular rotation to ensure precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If folding is performed above the point of gravity using conventional fixed pressing surfaces, then the folding operation can be completed, but twisting and deformation occur leading to misalignment of the lid with the tab
Solution Approach 1:
The pressing surface is made mobile instead of fixed, allowing it to move in the direction of travel of the cardboard sheet. This dynamic adaptation enables the pressing surface to follow the sheet's movement, preventing twisting and deformation during the folding operation while maintaining precise alignment between the lid and tab.
Solution Approach 2:
A mobile pressing surface acts as an intermediary element between the folding-over means and the cardboard sheet. This intermediary component absorbs and compensates for movement variations, ensuring smooth folding without causing the sheet to twist or deform, thereby maintaining manufacturing precision.
2Productivity
If high-speed continuous production is implemented, then productivity increases, but mechanical stress and deformation risk increase
Solution Approach 1:
The mobile pressing surface moves synchronously with the cardboard sheet at high speeds, maintaining constant contact without creating mechanical stress. This dynamic system allows continuous high-speed production while preserving folding precision, as the pressing surface adapts to the sheet's movement rather than imposing rigid forces.
Solution Approach 2:
The mobile pressing surface enables continuous folding operation without interruption or mechanical stress accumulation. By moving continuously with the sheet throughout the folding process, it maintains precise alignment and prevents deformation even at high production speeds, ensuring uninterrupted productive action.
3Manufacturing precision
If conventional folding mechanisms are used, then the structure remains simple, but alignment of the lid distal edge with the tab edge corner cannot be maintained
Solution Approach 1:
The pressing surface is mounted to move in the direction of travel of the cardboard sheet, adding a dynamic component to the folding mechanism. This movement capability enables precise alignment of the lid distal edge with the tab edge corner by adapting to the sheet's position, achieving high manufacturing precision with a relatively simple mobile support structure.
Data Source
AI summary
A device for forming a container by folding a cardboard sheet having a lid and notably a tab. The forming device comprising a conveyor driving said cardboard sheet in a direction of travel and a device for folding over said lid. The folding-over device comprises a pressing surface for pressing on said lid, and the pressing surface is configured to move from an initial position toward a deployed position of folding said lid, and vice versa. The said pressing surface is mobile in said direction of travel, and comprises an endless belt motorized in said direction of travel.