Plastic Bottle With Wavy Circumferential Rib Design
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Solution Overview
Problem
Plastic bottles face deformation issues due to loads in both horizontal and vertical directions during production and distribution, with existing solutions failing to adequately address these challenges, particularly under conditions like heating sterilization which reduces the bottles' strength.
Innovation Solution
A plastic bottle design featuring a body portion with a circumferential rib of varying depth in a wavy horizontal cross-sectional shape, combined with circumferential sub ribs and reduced pressure absorbing panels, which distributes and absorbs loads effectively in both directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a plastic bottle uses a conventional smooth cylindrical shape, then the manufacturing process is simple, but the bottle cannot sufficiently withstand horizontal loads during conveyor operations
Solution Approach 1:
The patent applies curvature by introducing circumferential ribs with wavy cross-sectional shapes into the otherwise cylindrical bottle body. The wavy pattern creates continuous curved surfaces that efficiently distribute horizontal loads, preventing stress concentration while maintaining the overall simple cylindrical form. This resolves the contradiction by adding load-bearing curvature without fundamentally changing the bottle's basic geometry or manufacturing process
Solution Approach 2:
The patent implements local quality by adding circumferential ribs only to specific regions of the bottle body where horizontal load resistance is needed, rather than making the entire bottle structure more complex. The ribs are strategically positioned and dimensioned (with specific depth and wave parameters) to provide localized reinforcement exactly where required during conveyor operations, while leaving other areas of the bottle simple and easy to manufacture
2Strength
If a plastic bottle uses a conventional smooth cylindrical shape, then the manufacturing process is simple, but the bottle cannot sufficiently withstand vertical loads during distribution
Solution Approach 1:
The circumferential ribs with wavy cross-sections create three-dimensional curved surfaces that efficiently distribute vertical compression loads around the bottle's circumference. The continuous curvature of the wavy pattern prevents stress concentration points, allowing the bottle to withstand stacking loads during distribution without requiring a completely redesigned bottle structure
Solution Approach 2:
The patent segments the bottle body by introducing circumferential ribs that divide the continuous cylindrical surface into distinct zones. These ribs act as structural segments that independently bear vertical loads, with multiple ribs working together to distribute the total vertical load across the entire bottle circumference, enhancing overall vertical strength while maintaining manufacturing simplicity
3Reliability
If the plastic bottle undergoes heating sterilization, then the bottles are sterilized effectively, but the bottle strength decreases making it more susceptible to deformation
Solution Approach 1:
The patent applies preliminary action by incorporating circumferential ribs with optimized wavy geometry into the bottle design before sterilization. These pre-built structural features are designed to compensate for the strength reduction that will occur during subsequent heating sterilization. The ribs provide inherent structural reinforcement that maintains bottle integrity even when the material becomes more susceptible to deformation under heat
Solution Approach 2:
The patent utilizes parameter changes by carefully selecting specific dimensions for the circumferential ribs (including wave amplitude, wavelength, and rib depth) that optimize structural performance after thermal processing. The rib parameters are designed to maintain adequate stiffness and strength even when the plastic material's mechanical properties change during and after heating sterilization, ensuring the bottle survives both the sterilization process and subsequent handling
Data Source
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AI summary
A plastic bottle 100 according to one or more embodiments of the present invention comprises: a body portion 3 provided with at least one circumferential rib 31 in a shape of a depression, wherein the circumferential rib 31 has a wavy horizontal cross-sectional shape with a depth in a direction from a surface of the plastic bottle 100 toward inside the plastic bottle 100 which depth varies continuously in a circumferential direction of the plastic bottle 100, and the depth of the circumferential rib has a maximum value of 4.5 mm to 6.0 mm and a minimum value of 3.5 mm to 4.4 mm.