Rigid Box Wrapping With Pneumatic Pressure for Uniform Adhesion
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Solution Overview
Problem
Existing automated production lines for wrapped rigid boxes face issues with uneven adhesion of pre-glued wrapping sheets due to pressor elements that compress from above, leading to partial adhesion failures, especially in larger boxes, and require format-specific pressor elements causing downtimes and reduced productivity.
Innovation Solution
A gaseous pressor element, integrated with a closing system, applies even pressure within a closed chamber formed by the box and closing system, ensuring uniform adhesion of the wrapping sheet to the box base, adaptable to various formats without downtime, and includes smoothing mechanisms to enhance adhesion and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressor element compresses the box from above, then the adhesion at the peripheral area is improved, but the adhesion in the innermost area becomes poor
Solution Approach 1:
Instead of compressing the box from above with a solid pressor element, the invention inverts the approach by introducing a gas (air) into the closed chamber formed by the box and closing system. The gas expands to apply uniform pressure from all directions onto the base, reversing the compression direction and achieving even adhesion across the entire surface including the innermost area.
Solution Approach 2:
The invention applies pneumatic principles by using a gas (air) as the pressor medium. The gas is introduced into the closed chamber and expands to exert uniform pressure on the base of the box, ensuring consistent adhesion of the wrapping sheet across the entire surface. This pneumatic approach replaces the mechanical solid pressor with a fluid-based system that naturally distributes pressure evenly.
2Reliability
If format-specific pressor elements are used, then the adhesion quality is improved, but the productivity decreases due to downtimes for changing pressor elements
Solution Approach 1:
The closing system with gas expansion serves multiple box formats universally. Instead of requiring different pressor elements for different box sizes, the same closing system can accommodate various formats by adjusting the gas pressure and volume. The gas naturally adapts to fill the closed chamber regardless of the box dimensions, providing universal applicability without format-specific components.
Solution Approach 2:
The invention changes the parameter of pressure distribution from localized (solid pressor) to uniform (gas expansion). By controlling the gas pressure and volume parameters, the system can adapt to different box formats without physical reconfiguration. The gas pressure can be adjusted to match different box sizes and requirements, enabling flexible production across multiple formats without downtime for changing pressor elements.
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
The gaseous pressor element provides uniform pressure distribution, preventing air bubble trapping and improving adhesion, reducing manual intervention, and increasing production efficiency by allowing format flexibility and seamless transition through the production line.
Implementation Method 1
A gaseous pressor element, integrated with a closing system, applies even pressure within a closed chamber formed by the box and closing system
Data Source
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AI summary
Method for wrapping a cardboard box with a wrapping sheet, comprising: providing a cardboard box (100) with a continuous edge (103) delimiting an opening (104) of the box (100); providing a wrapping sheet (200); coupling the box (100) and the sheet (200); placing on a supporting surface (11) the box (100) coupled to the sheet (200) so that the opening (104) of the box (100) is opposed to the supporting surface (11); positioning a closing system (20) on the continuous edge (103) of the box (100) so as to define a closed chamber that is comprised between the box (100) and the closing system (20); supplying air inside the closed chamber so as to make the box (100) adhere to the sheet (200).