Spiral Ribs Enhance Plastic Bottle Side Stability
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Solution Overview
Problem
The challenge is to create a container, particularly a plastic bottle, that minimizes material usage while maintaining stability and resistance to side loads, especially in premium packaging where conventional stiffening elements like horizontal ribs are undesirable for aesthetic reasons, yet still needs to withstand mechanical stresses during use and transport.
Innovation Solution
The container features spiral ribs formed along its wall, which provide enhanced stability and deformation resistance without appearing as purely technical, as they are designed to spiral around the main axis, increasing side stability and compression resistance, particularly at the grip portion where mechanical stresses are applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the wall thickness is reduced to create lightweight containers, then material usage and production cost decrease, but side-load deformation resistance deteriorates
Solution Approach 1:
The container wall is segmented into multiple thin-walled circumferential reinforcement elements (ribs) distributed around the circumference. These segmented reinforcement elements provide cumulative stiffening effect equivalent to or greater than a single thick wall, while using less total material. The ribs are positioned at specific circumferential intervals to optimize structural support against side loads.
Solution Approach 2:
The reinforcement structure transitions from a two-dimensional flat wall to a three-dimensional corrugated structure with circumferential ribs. By adding the circumferential dimension of ribs extending around the container, the structure gains additional load-bearing capacity and resistance to side-load deformation without significantly increasing material quantity.
2Strength
If horizontal ribs are added to enhance lateral stability, then side-load deformation resistance improves, but aesthetic appearance deteriorates
Solution Approach 1:
The reinforcement elements are designed with asymmetric cross-sectional profiles and varying depths around the circumference rather than uniform symmetric ribs. This asymmetry creates visual interest and aesthetic appeal while maintaining structural effectiveness. The ribs can have different heights, positions, and profiles to achieve both cosmetic and structural goals.
Solution Approach 2:
The container incorporates curved and rounded rib profiles rather than sharp angular shapes. The circumferential ribs follow curved paths and have rounded cross-sections that contribute to an appealing aesthetic appearance. The curvature of the ribs and their integration into the overall container shape create visually pleasing forms while providing structural reinforcement.
3Strength
If the number of reinforcement elements is increased to improve stability, then side-load deformation resistance improves, but device complexity increases
Solution Approach 1:
Multiple reinforcement functions are merged into single integrated circumferential rib structures. The ribs simultaneously provide side-load resistance, structural stiffening, and aesthetic features. By combining these functions into unified elements rather than separate components, the structure achieves enhanced stability without proportionally increasing complexity.
Solution Approach 2:
The circumferential reinforcement elements serve multiple functions: they provide mechanical reinforcement against side loads, contribute to the container's aesthetic appearance, and can facilitate handling or stacking. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in overall structural complexity.
Data Source
AI summary
The invention relates to a container (1), preferably a bottle, which extends along a main axis (A) and comprising a wall forming a neck portion (2), a shoulder portion (3) connected to the neck portion (2), a body portion (4) connected to the shoulder portion (3), the body portion (4) comprising a grip portion (7), and a base portion (5) forming the bottom of the container (1) and connected to the body portion (4). The grip portion (7) comprises, over at least the majority of its dimension along the main axis (A), a plurality of spiral ribs (13) formed by the wall of the container (1) and spiralling in parallel around the main axis (A). The spiral ribs drastically increase side stability, compression and twisting deformation resistance of the container, while they have a non-technical and appealing appearance.