Synthetic Resin Bottle Bottom Recessed Segmentation for Buckling Strength
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Solution Overview
Problem
Existing synthetic resin bottles with cylindrical shapes and bottom portions that include a ground contact portion and a heel portion are prone to deformation under compressive loads, leading to potential buckling issues that compromise filling buckling strength.
Innovation Solution
The bottle features a bottom portion with a ground contact portion and a cylindrical heel portion, where multiple recessed portions are strategically placed at equal intervals in the circumferential direction. These recessed portions extend from the ground contact portion to the heel portion, with specific dimensions that ensure a balanced deformation under compressive loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the bottle is made lighter by reducing material, then weight is reduced, but filling buckling strength deteriorates under compressive loads
Solution Approach 1:
The bottom wall portion is segmented into multiple recessed portions arranged circumferentially, creating a structured composition that enhances buckling resistance without increasing overall weight. The recessed portions divide the bottom wall into multiple segments that can deform independently, distributing stress more effectively.
Solution Approach 2:
The recessed portions are strategically positioned at specific locations on the bottom wall, creating local structural variations that enhance buckling strength where needed. The ground contact portion and heel portion have different structural characteristics optimized for their specific functional requirements.
2Stability of the object's composition
If the heel portion is made more curved to improve stability, then stability improves, but deformation under compressive loads increases causing buckling
Solution Approach 1:
The bottom wall is divided into multiple recessed portions that can deform independently under compressive loads, preventing concentrated deformation at any single location. This segmentation allows the curved heel portion to maintain its stabilizing geometry while distributing deformation across multiple segments.
Solution Approach 2:
The depth, width, and circumferential spacing of the recessed portions are optimized to balance stability and buckling resistance. By adjusting these geometric parameters, the design achieves both the curved stability of the heel portion and resistance to radial deformation under load.
3Strength
If recessed portions are added to improve buckling strength, then filling buckling strength improves, but device complexity increases
Solution Approach 1:
The bottom wall is segmented into recessed portions that can be formed using standard molding techniques, adding structural complexity only where needed for buckling resistance while maintaining simplicity in other areas of the bottle design.
Solution Approach 2:
The recessed portions are integrated into the bottom wall as a unified structure during molding, combining the bottom wall and reinforcement features into a single manufactured component rather than assembling multiple separate parts.
Data Source
AI summary
The present invention relates to a bottle having a cylindrical shape with a bottom and formed of a synthetic resin material. In the bottle, a bottom portion includes a bottom wall portion, and a cylindrical heel portion. A plurality of recessed portions are provided in the bottom portion at equal intervals in a circumferential direction. A bottom surface of each of the plurality of recessed portions has a rectangular shape extending in the radial direction when viewed from below. When an interval in the circumferential direction between upper end portions located at the heel portion, among bottom surfaces of recessed portions adjacent to each other in the circumferential direction of the plurality of recessed portions, is defined as A, and a size in the circumferential direction of the upper end portions of the bottom surfaces of the recessed portions is defined as B, 1.0<A/B<3.2 is satisfied.