Molded Container Base With Intersecting Dome Impressions
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Solution Overview
Problem
Existing molded containers with bases designed for blow molding or stretch blow molding lack optimal geometry for supporting pressure and weight, while also being inefficient in material usage.
Innovation Solution
A container design featuring a base with a standing ring, radially inwardly extending base wall, and dome-like impressions, where at least two impressions intersect, providing enhanced structural support and material efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional base geometry is used in blow molded containers, then the container can be manufactured using standard processes, but the base lacks optimal structural integrity and stability to support pressure and weight
Solution Approach 1:
The patent applies spherical cap geometry to the base wall, replacing conventional flat or simple curved bases with a mathematically defined spherical surface. This curvature distributes stress more evenly across the base structure, enhancing structural integrity and stability while maintaining manufacturability through the spherical coordinate system formulation.
Solution Approach 2:
The patent modifies base geometry by introducing specific parametric equations that define the spherical cap shape, controlling parameters such as radius, height, and angular extent. These parameter changes optimize the base's load-bearing capacity and stability while ensuring compatibility with blow molding processes.
2Strength
If sufficient material is used in the base to ensure structural support, then pressure and weight bearing capacity improves, but material usage efficiency decreases
Solution Approach 1:
The patent applies different geometric properties to different regions of the base. The spherical cap configuration provides enhanced thickness and structural support at critical load-bearing areas while maintaining optimal material distribution throughout the base wall, achieving both strength and material efficiency through spatially varying geometry.
Solution Approach 2:
The spherical cap geometry naturally optimizes material distribution by concentrating material where structural support is needed most (at the base periphery and transition zones) while reducing material in less critical areas, achieving efficient load transfer with minimal material usage.
3Stress or pressure
If conventional base geometry is used, then manufacturing process is simple, but the base cannot effectively support internal pressures during storage and filling
Solution Approach 1:
The patent formulates the base geometry using spherical coordinate parameters that can be directly programmed into blow molding tooling, allowing complex spherical cap shapes to be manufactured through standard processes by controlling parameters such as radial distance, polar angle, and azimuthal angle during the molding operation.
Solution Approach 2:
The spherical cap geometry provides inherent pressure distribution properties that naturally accommodate internal pressures during filling and storage, while the smooth curved surface is well-suited for blow molding fabrication, reconciling structural requirements with manufacturing simplicity.
Data Source
AI summary
A thermoplastic container including a body with a base, where the base includes a standing ring positioned concentric to the central axis, a base wall extending radially inwardly from the standing ring, and a plurality of dome-like impressions formed into the base wall, and where at least two of the dome-like impressions intersect with each other.