Reinforced Container Bottom Wall Design for Drop Resistance
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Solution Overview
Problem
Existing injection molded containers struggle to balance the requirements of withstanding rigorous handling conditions, such as drop tests at various temperatures, while also accommodating in-mold labeling techniques for aesthetic appeal.
Innovation Solution
The container design features a bottom wall with a central and two curved portions, reinforcing ribs, and a sloped region that merges perpendicularly with the sidewalls, enhancing structural integrity and allowing for effective in-mold labeling by ensuring proper label adhesion and distribution of stress during handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container uses a simple bottom wall design for easy manufacturing, then manufacturing precision is improved, but the container cannot withstand rigorous handling conditions and drop tests
Solution Approach 1:
The bottom wall incorporates reinforcing ribs only in specific high-stress areas rather than uniformly throughout the entire structure. The ribs are positioned to provide maximum structural support where needed while maintaining simplicity in other regions, thus improving reliability without excessive complexity
Solution Approach 2:
The bottom wall features curved portions with specific radii of curvature instead of flat or angular designs. These curved sections better distribute stress during drop tests and handling, enhancing the container's ability to withstand rigorous conditions while remaining manufacturable through standard injection molding
2Strength
If the container bottom wall is designed with complex curvature for structural strength, then strength is improved, but in-mold labeling adhesion and quality deteriorate
Solution Approach 1:
The labeling surface is designed with different geometric properties than the reinforcing structures. The areas intended for labeling maintain smoother, more uniform surfaces optimized for label adhesion, while reinforcing ribs are positioned in non-labeling zones where complex geometry is acceptable and even beneficial for strength
Solution Approach 2:
The bottom wall is segmented into distinct functional zones: labeling surfaces with optimized smooth curvature for label adhesion, and reinforcing rib regions with complex geometry for structural strength. This segmentation allows each zone to be optimized for its specific function without compromising the other
Data Source
AI summary
A container is provided. The container includes multiple sidewalls extending in a substantially vertical direction and a bottom wall. The bottom wall includes a central portion, a first curved portion and a second curved portion. The first curved portion includes a first radius of curvature with a first center of curvature located on a first side of the bottom wall of the container, while the second curved portion terminates at the sidewalls and include a second radius of curvature with a second center of curvature located on a second side of the bottom wall of the container. The container further includes multiple reinforcing ribs located on the second side, each of the reinforcing ribs having a minimum height proximate the first curved portion and a maximum height proximate the second curved portion.