Plastic Container Bottom With Curved Concave Section
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Solution Overview
Problem
Plastic containers, such as bottles, face deformation issues under slight overpressure, which compromises their structural safety and requires complex designs with additional material, limiting labeling space and increasing weight.
Innovation Solution
A plastic container design featuring a curved concave bottom section with a graduated transition area, grooves, and panel-like projections that allow controlled deformation under increased pressure, maintaining stability and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the container body is designed with relatively large wall thickness to prevent deformation under overpressure, then structural strength is improved, but material usage increases and weight increases
Solution Approach 1:
The bottom section is designed with locally concentrated reinforcement elements (graduated transition area with varying wall thickness, panel-like projections, and grooves) rather than uniformly thick walls throughout the container. This allows the bottom section to withstand overpressure while minimizing overall material usage.
Solution Approach 2:
The bottom section features a curved concave design with a graduated transition area that smoothly varies in thickness. This curved geometry distributes stress more effectively than flat surfaces, providing structural strength with reduced material requirements.
2Reliability
If deformable sections are added to the container body to allow controlled deformation under overpressure, then structural safety is maintained, but device complexity increases
Solution Approach 1:
The bottom section is segmented into distinct functional zones: a curved concave section, a graduated transition area with varying thickness, a platform, and panel-like projections. This segmentation allows each zone to perform its specific function in managing overpressure while maintaining overall structural safety.
Solution Approach 2:
The wall thickness parameter is varied continuously in the graduated transition area, creating a gradient from thicker to thinner sections. This parameter change allows controlled deformation behavior under overpressure while maintaining structural integrity, avoiding the need for complex mechanical deformable elements.
3Stability of the object's composition
If the container bottom is designed with feet to distribute weight and prevent deformation, then structural stability is improved, but the container height increases and labeling space is reduced
Solution Approach 1:
Instead of adding feet that extend vertically outward (increasing container height), the reinforcement structure is integrated into the bottom section's horizontal plane. The panel-like projections and graduated transition area provide stability through horizontal geometry rather than vertical extensions.
4Strength
If the container body is designed with large wall thickness to prevent uncontrolled deformation, then structural safety is improved, but labeling space is reduced
Solution Approach 1:
Reinforcement is concentrated locally at the bottom section where overpressure effects are most significant, rather than applying uniform thickness throughout the entire container body. This allows the majority of the container surface area to remain available for labeling while maintaining structural safety.
Data Source
AI summary
A plastic container for storing liquid under a low overpressure having a container body, to whose one longitudinal end a container neck is connected, which neck has a pour opening. A bottom section has a container bottom and an edge area pulled up on the sides and that turns into the container body, is connected to the other longitudinal end of the container body. The container bottom has a curved concave section, whose periphery is connected via an axially projecting, graduated transition area to a platform that runs into the edge area pulled up on the sides. The platform and at least one partial area of the graduated transition area are interrupted by a first number of grooves. In the concave section, a second number of panel-like projections are made, which essentially extend between the graduated transition area and the longitudinal axis and end before the graduated transition area.