Plastic Container Base with Curved Dome and Ribs
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Solution Overview
Problem
Plastic material containers for beverages face challenges in maintaining stability under internal pressures while reducing manufacturing blow molding pressures and material usage, especially for still water and lightly pressurized products, where high pressures during production are energy-intensive and uncertain.
Innovation Solution
A plastic material container design featuring a one-piece structure with a base portion having an injection point, a central dome-like structure, and reinforcement ribs, allowing for reduced manufacturing blow molding pressures below 20 bar, ensuring stability under pressure and thermal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high manufacturing blow molding pressure (over 30 bar) is used to shape root radii of base flutings, then geometric accuracy of base geometry is improved, but energy expenditure increases and production cost increases
Solution Approach 1:
The base geometry is designed with optimized root radii of flutings that achieve the required geometric accuracy and pressure stability without requiring excessively high blow molding pressures. The curvature parameters are specifically tailored to form stable base structures at reduced pressures below 30 bar.
Solution Approach 2:
The patent modifies the geometric parameters of the base, particularly the root radii of flutings and the dome structure geometry, to achieve optimal pressure distribution and structural stability. These parameter optimizations allow production at lower blow molding pressures while maintaining or improving geometric accuracy.
2Manufacturing precision
If high manufacturing blow molding pressure (over 30 bar) is used to shape root radii of base flutings, then geometric accuracy of base geometry is improved, but production cost increases
Solution Approach 1:
The base geometry is designed with optimized root radii of flutings that achieve the required geometric accuracy and pressure stability without requiring excessively high blow molding pressures. The curvature parameters are specifically tailored to form stable base structures at reduced pressures below 30 bar.
Solution Approach 2:
The patent modifies the geometric parameters of the base, particularly the root radii of flutings and the dome structure geometry, to achieve optimal pressure distribution and structural stability. These parameter optimizations allow production at lower blow molding pressures while maintaining or improving geometric accuracy.
3Ease of manufacture
If material usage is reduced to save costs, then production cost decreases, but stability under internal pressure deteriorates
Solution Approach 1:
The dome-shaped base structure with optimized curvature radii distributes internal pressures more evenly across the base area, enhancing stability without requiring additional material. The spherical geometry naturally resists pressure loads more effectively than flat or sharply curved designs.
Solution Approach 2:
The patent optimizes geometric parameters including the root radii of flutings and dome structure dimensions to achieve maximum structural efficiency. These parameter adjustments allow the use of less material while maintaining or improving pressure stability in the filled state.
4Ease of manufacture
If material usage is reduced to save costs, then production cost decreases, but manufacturing precision requirements increase
Solution Approach 1:
The dome-shaped base structure with optimized curvature radii distributes internal pressures more evenly across the base area, enhancing stability without requiring additional material. The spherical geometry naturally resists pressure loads more effectively than flat or sharply curved designs.
Solution Approach 2:
The patent optimizes geometric parameters including the root radii of flutings and dome structure dimensions to achieve maximum structural efficiency. These parameter adjustments allow the use of less material while maintaining or improving pressure stability in the filled state.
Data Source
AI summary
A one piece plastics material container has mouth, a wall portion adjoining the mouth in a longitudinal direction (L) and a base portion in the form of a standing face. The base portion has an injection point—situated on the inside in a radial direction (R) with respect to the longitudinal direction (L)—on the outer wall of the plastics material container, a central area which surrounds the injection point, and a transition portion which extends from the central area to the wall portion. The transition portion has in at least one radial direction (R) and preferably in each radial direction (R) a curvature with a finite radius of curvature in at least one portion. The base portion has a plurality of reinforcement ribs which starting from the central area extend in the direction of the wall portion.