Resin Container Groove Design for Deformation Control
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Solution Overview
Problem
Resin-made containers face issues with permanent deformation when pressed due to reduced rigidity, making it difficult to restore their original shape after deformation.
Innovation Solution
The container body features a convex portion with a pair of second regions extending from the first region, and a continuous second groove portion formed along a virtual line that crosses the first region, providing both flexibility and rigidity to prevent permanent deformation by allowing deformation along the groove lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the container body is thinned to reduce weight and cost, then resource conservation and cost reduction are achieved, but rigidity drops making the container prone to deformation
Solution Approach 1:
The container body is divided into multiple regions (first region, second region) separated by groove portions. This segmentation creates a rib-like structure that maintains rigidity while using less material, resolving the contradiction between thinning for weight reduction and maintaining structural strength.
Solution Approach 2:
Different regions of the container body are given different structural characteristics. The first region and second region have different thicknesses and structural properties, with the second region providing enhanced rigidity at critical areas while the overall container remains thin and lightweight.
2Strength
If ribs are added to suppress rigidity drop, then structural strength is improved, but permanent deformation occurs at connection positions when pressed
Solution Approach 1:
The groove portions are pre-formed in the container body to create controlled deformation paths. When external pressure is applied, the container deforms along these pre-defined grooves rather than creating unpredictable permanent deformation at rib connection points, maintaining reliability.
Solution Approach 2:
The groove portions act as intermediary elements between the first region and second region. They provide a controlled interface that manages stress distribution and deformation, preventing direct stress concentration at the connection positions between regions.
3Adaptability or versatility
If the first region is made larger to improve flexibility, then ease of deformation is improved, but rigidity decreases making permanent deformation more likely
Solution Approach 1:
The first region and second region are designed with different local qualities - the first region provides flexibility for necessary deformation, while the second region provides rigidity to prevent permanent deformation. This local differentiation resolves the contradiction between flexibility and rigidity requirements.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
A resin-made container including a container body formed by using a synthetic resin so as to form an internal space for accommodating an article, the container body including a convex portion including a first region having one surface facing the internal space and a second region extending from an end portion of the first region to the one surface side of the first region and formed on an outer side of a projected region to the internal space side in the first region, and the container body includes a first groove portion formed in the first region along one direction and a second groove portion formed along an other direction crossing the one direction, and a plurality of second groove portions are formed at an interval along the one direction and each are formed continuously from an inside of the first region to an inside of the second region so as to overlap a virtual line crossing the first groove portion in the first region.