PET Bottle Barrel Rib Design for Stacking Stability
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Solution Overview
Problem
Conventional PET bottles deform easily when stacked or packaged with heat-shrinkable films due to point or line contact and applied loads, leading to structural instability and potential damage.
Innovation Solution
A bottle container design featuring a cylindrical barrel with a quadrangular prism shape, including inwardly projecting ribs and bulging parts, which allows for surface contact and stress dispersion when stacked, reducing deformation and enhancing grip and label stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the thickness of the bottle body is reduced to save resources, then material usage decreases, but the resistance force to grip becomes insufficient and holding becomes difficult
Solution Approach 1:
The bottle body employs varying wall thicknesses in different regions: the barrel has reduced thickness for material savings, while the shoulder and bottom maintain increased thickness to provide structural support and grip resistance. This local differentiation allows resource reduction without compromising handling ease.
Solution Approach 2:
The bottle body is divided into distinct functional zones with different thickness characteristics: a thinner barrel section for material efficiency and thicker shoulder/bottom sections for structural integrity and grip stability. This segmentation enables optimized material distribution.
2Shape
If conventional PET bottles with curved outer surfaces are aligned in standing state, then they make point or line contact, but this causes deformation under pressing force from heat-shrinkable film
Solution Approach 1:
The bottle employs a curved outer surface design that enables surface-to-surface contact when bottles are aligned in standing state. This curvature modification transforms point or line contact into extended surface contact, distributing pressing forces from heat-shrinkable film and preventing deformation.
3Productivity
If bottles are stacked in multiple tiers during transportation, then vertical space utilization improves, but load application causes further deformation
Solution Approach 1:
The bottle design concentrates structural reinforcement in the bottom region with increased thickness to bear vertical loads from stacked bottles above. This localized strengthening enables stable multi-tier stacking while maintaining overall material efficiency.
Data Source
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AI summary
The present invention is a bottle container including a bottle body having a barrel, wherein the barrel includes a rib forming part, the barrel has an upper contact part and a lower contact part that are in surface contact with another bottle body, respectively, above and below the rib forming part, when it is aligned with the other bottle body in a standing state, and a virtual plane extended downwardly from the upper contact part, a virtual plane extended upwardly from the lower contact part, and an outer part of the rib forming part are flush with each other.