Container Outer Skeleton with Superposed Panels and Heat-Activated Glue
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Solution Overview
Problem
Existing container outer skeletons lack sufficient mechanical strength, particularly when subjected to axial squeezing, leading to issues such as detachment of the inner coating.
Innovation Solution
A method and apparatus for making a container outer skeleton with a lateral wall comprising superposed panels with heat-activatable glue, which are pressed together to activate the glue and create a stronger adhesive coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional single-sheet or simple panel structures are used for the outer skeleton, then the manufacturing process is simple, but the mechanical strength is insufficient when subjected to axial squeezing
Solution Approach 1:
The outer skeleton is divided into multiple superposed panels (first panel, second panel, third panel) that are stacked and connected through fold lines. This segmentation allows each panel to contribute to the overall structural strength while maintaining a manageable complexity through standardized connections.
Solution Approach 2:
The invention uses multiple layers of panels superposed and connected to form a composite structure. The combination of multiple panels with heat-activatable glue creates a stronger composite material system that resists axial squeezing forces better than single-sheet structures.
2Strength
If panels are superposed and connected with heat-activatable glue, then the adhesive coupling and mechanical strength are enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The panels are provided with heat-activatable glue in advance before assembly. This preliminary application of adhesive allows for easier assembly during manufacturing, as the panels can be positioned and then activated through heating rather than requiring complex joining mechanisms during the assembly process.
Solution Approach 2:
The invention uses heat-activatable glue that changes its properties with temperature. At manufacturing temperature, the glue is activated to provide strong adhesion between panels. This parameter change allows for controlled bonding strength during manufacturing while ensuring durable connections in the final product.
3Strength
If the outer skeleton is made from simple cardboard or paperboard, then the manufacturing is easy and cost-effective, but the structural integrity under axial load is insufficient
Solution Approach 1:
The invention transitions from a two-dimensional single-sheet structure to a three-dimensional multi-panel superposed configuration. By stacking panels in multiple layers and connecting them through fold lines, the structure gains dimensional complexity that significantly improves structural integrity under axial loading while maintaining compatibility with standard cardboard and paperboard materials.
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 resulting outer skeleton exhibits enhanced mechanical strength, enabling containers to withstand axial squeezing without compromising the inner coating.
Implementation Method 1
at least one of either the pressing element or the supporting element is kept at a temperature of between 50°C and 250°C... causing activation of the heat-activatable glue present between the at least one pair of superposed panels
Implementation Method 2
activation of the heat-activatable glue present between the at least one pair of superposed panels causes an adhesive coupling between the at least one pair of panels
Implementation Method 3
a pressing element, movable relative to the supporting element, is inserted in the compartment defined by the outer skeleton... configured to press the at least one pair of superposed panels against the supporting element
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
Method and apparatus for making an outer skeleton (3) for a container (25), wherein the outer skeleton (3) comprises a bottom wall (5), and a lateral wall (6), and wherein the lateral wall (6) has at least one pair of superposed panels between which a heat-activatable glue (30) is present. The method comprises inserting a pressing element (15) inside the outer skeleton (3), the pressing element (15) being configured to expand and to thereby press on the at least one pair of superposed panels and to cause activation of the heat-activatable glue (30) and a consequent adhesive coupling between the pair of panels thanks to the heat supplied by the pressing element (15) or by a supporting element (23) coupled to it. The apparatus comprises the pressing element (15) and the supporting element (23) configured to operate in this way.