Plastic Container Base With Stepped Radial Lugs For Pressure Stability
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Solution Overview
Problem
Plastic containers face challenges in maintaining dimensional stability and support under high internal pressures from contents like carbonated liquids or elevated temperatures, which existing base structures fail to adequately address.
Innovation Solution
A base structure for plastic containers featuring a central vertical axis, an outer supporting annular portion, and a base portion with radially extending lugs and interspersed land portions, providing enhanced support and stability through a combination of stepped segments and smooth surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional base structures are used, then manufacturing is simple, but dimensional stability under high internal pressure deteriorates
Solution Approach 1:
The base structure is divided into multiple functional segments: an outer supporting annular portion for pressure distribution, a central support portion for structural integrity, and a base portion with radially extending lugs featuring stepped segments. This segmentation allows each region to perform its specific function optimally while maintaining overall dimensional stability under high internal pressure.
Solution Approach 2:
Different regions of the base are given different structural qualities tailored to their specific functions. The outer annular portion provides broad support, the central portion maintains rigidity, and the lugs with stepped segments provide localized reinforcement. The smooth land portions between lugs provide gradual transitions. This local differentiation of structural properties enables the base to resist deformation under pressure while remaining manufacturable.
2Strength
If base structure with lugs and stepped segments is implemented, then support and dimensional stability improve, but manufacturing complexity increases
Solution Approach 1:
The stepped segments in the lugs create a progressive structural reinforcement that adapts to varying pressure loads. The stepped configuration allows the base to dynamically respond to internal pressure by distributing forces through multiple levels of the steps, enhancing support capability while the smooth land portions facilitate more straightforward molding processes.
Solution Approach 2:
The stepped segments extend the base structure into the vertical dimension, creating multiple levels of support within the lugs. This dimensional approach allows the base to achieve greater strength and support capability without proportionally increasing the horizontal footprint or overall complexity of the molding process.
Data Source
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AI summary
A base (20) for a plastic container (10) is disclosed. The base (20) includes a central vertical axis (A); an outer supporting annular portion (30) for supporting said container (10) on a surface; a central portion (40) of the base (20), the central portion (40) provided about said central vertical axis (A); and a base portion (50). The base portion (50) extends between the annular portion (30) and the central support portion (40) of the base (20). The base portion (50) includes at least two lugs (60) that extend radially from a position adjacent the annular portion (30) towards the central portion (40), the lugs (60) including at least two stepped segments (90, 100).