Synthetic Resin Container Bottom Part Reversible Buckling Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Synthetic resin containers face rigidity issues due to thin wall thickness, leading to potential buckling deformation during axial loading, and the use of liquid nitrogen for pressurization is not consistently effective in maintaining internal pressure.
Innovation Solution
A synthetic resin container design featuring a bottom part with a central bottom plate and peripheral grounding part that changes shape reversibly when loaded axially, increasing internal pressure to prevent buckling deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the wall thickness of the container is reduced to decrease weight and cost, then the rigidity of the container deteriorates, causing buckling deformation under axial load
Solution Approach 1:
The bottom part is pre-formed with a grounding part having a specific slope structure during molding. This preliminary structural preparation enables the bottom part to automatically generate upward elastic force when axially loaded, preventing buckling deformation before it occurs during stacking or transportation
Solution Approach 2:
The grounding part of the bottom part is given a specific local structure with an inside slope and outside slope, creating a localized elastic deformation zone. This local structural differentiation allows the bottom part to deform elastically under load while maintaining the overall integrity and thin-wall design of the container
2Strength
If liquid nitrogen is added to pressurize the container interior to increase buckling resistance, then the internal pressure increases, but the liquid level height varies and the container shape is restricted
Solution Approach 1:
The invention extracts and eliminates the liquid nitrogen pressurization system entirely. Instead, it uses the mechanical elastic deformation capability built into the bottom part's grounding structure to provide buckling resistance, thereby removing the constraints and variability issues associated with gas pressurization while maintaining container shape flexibility
Solution Approach 2:
The bottom part's grounding structure is designed to automatically provide buckling resistance through its own elastic deformation when axially loaded. The structure serves itself by converting applied load into upward elastic force, eliminating the need for external pressurization systems and their associated complications
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 design enhances the container's rigidity by maintaining positive internal pressure, preventing unintended deformation and ensuring structural integrity during stacking and transportation.
Implementation Method 1
the shape of the bottom part changes reversibly such that the bottom plate part is depressed inwardly to the container
Data Source
AI summary
A synthetic resin container, in which the bottom part 4 having a bottom plate part 41 which is present at the center of the bottom part and a peripheral part 42 which is positioned at the periphery of the bottom plate part 41, in the peripheral part 42, a grounding part 422 having an inside slope 422a which rises outwardly of the container with the outer peripheral edge of the bottom plate part 41 being the start point and an outside slope 422b which continues to the side surface of the bottom part 4 is formed, and when a load is applied in the axial direction in the state where the container stands upright on the grounding surface G, the shape of the bottom part 4 changes reversibly such that the bottom plate part 41 is depressed inwardly to the container. As a result, it is possible to avoid deformation of a container into an unintended shape by buckling or the like even if a load is applied to a container in the axial direction, and to ensure the rigidity of a container against a load in the axial direction.