Frustoconical Pressurized Plastic Bottle Design
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Solution Overview
Problem
Pressurized plastic bottles face challenges in resisting operating pressure, vacuum conditions, impacts, and decoration while maintaining structural integrity and ease of production.
Innovation Solution
A pressurized bottle design featuring a body with a substantially frustoconical shape extending over more than one-third of its height, combined with a stable bottom and adjustable neck dimensions, enhances mechanical strength and impact resistance while allowing for easy decoration and production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bottle body has a constant cylindrical section, then the manufacturing process is simple, but the resistance to operating pressure and crushing strength is insufficient
Solution Approach 1:
The patent applies curvature by transitioning from a cylindrical body to a frustoconical shape with rounded transitions. The frustoconical portion with its angled walls and the rounded portions connecting different sections create a curved, aerodynamic profile that distributes stress more effectively throughout the bottle structure, thereby improving pressure and crushing resistance without excessive complexity
Solution Approach 2:
The patent changes the geometric parameters of the bottle body by introducing a frustoconical section with specific angle ranges (3-15 degrees) and defining the extent of rounded portions with radius constraints. These parameter changes optimize the structural integrity and stress distribution while maintaining manufacturability through controlled geometric variations
2Object-affected harmful factors
If the bottle body is made with rounded convex profile, then the impact resistance is improved, but the label application and decoration quality deteriorates
Solution Approach 1:
The patent strategically applies curvature only in specific zones (rounded portions at transitions) rather than across the entire body. The main frustoconical section maintains relatively straight, planar surfaces that are ideal for label application, while localized rounded portions provide impact resistance at stress-prone transition areas, thus resolving the contradiction between impact resistance and labeling quality
3Strength
If the frustoconical portion is extended over a larger height, then the mechanical strength is improved, but the material consumption increases
Solution Approach 1:
The patent optimizes the frustoconical portion's angular parameter (3-15 degrees) and its extent along the bottle height to achieve the best balance between mechanical strength and material efficiency. By controlling these parameters, the design maximizes structural reinforcement where needed while minimizing unnecessary material usage in regions where less reinforcement is required
Data Source
AI summary
The present invention relates to a pressurized bottle (1) having a container (3) made of plastics material, comprising: - a body (10) extending along a longitudinal axis (X), the body having at least one portion (11) which extends over at least one third of the total height (H) of the container (3), - a neck (20) formed integrally with the body, characterized in that said portion (11) has a substantially frustoconical shape, better still a frustoconical shape with a rectilinear generatrix.