Aerosol Dispenser Crimp Ring Vents for Overpressurization
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Solution Overview
Problem
Aerosol dispensers made from plastic are susceptible to overpressurization and deformation at elevated temperatures, leading to potential rupture and premature loss of propellant and product, which existing solutions have failed to address effectively while maintaining a robust seal.
Innovation Solution
The design incorporates a crimp ring with strategically placed vents on the outer and inner surfaces, allowing for controlled pressure release and maintaining a seal at elevated temperatures, featuring a substantially planar or continuous convex upper surface to enhance sealing and venting through the outer surface without compromising the seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic components are used in aerosol dispensers, then manufacturing cost is reduced and recyclability is improved, but the dispenser becomes susceptible to overpressurization and deformation at elevated temperatures
Solution Approach 1:
The patent incorporates vents into the crimp ring structure during manufacturing, creating a preemptive pressure relief mechanism before overpressurization can occur. This preliminary design feature allows the plastic dispenser to safely handle temperature elevation without requiring post-manufacturing modifications or special handling procedures.
Solution Approach 2:
The patent converts the potential harm of overpressurization into a beneficial controlled venting mechanism. The vents transform the dangerous pressure buildup into a safe, controlled pressure release process, turning what would be a failure mode into a protective feature that maintains reliability while using cost-effective plastic materials.
2Reliability
If vents are added to the crimp ring, then pressure relief is enabled at excessive temperatures, but the seal robustness may be compromised
Solution Approach 1:
The patent applies local quality by positioning vents in specific locations on the crimp ring where they provide pressure relief without compromising the overall seal integrity. The vents are strategically placed to allow pressure escape while maintaining sealing effectiveness at the critical sealing surfaces, creating different functional zones within the same component.
Solution Approach 2:
The patent utilizes parameter changes by designing vents with specific dimensions, orientations, and placements that allow pressure relief at excessive temperatures while maintaining seal robustness at normal operating conditions. The vent parameters are optimized to activate only when needed, preserving seal strength during regular use.
3Strength
If the upper surface of the crimp ring is made planar or convex, then sealing is enhanced, but venting capability may be reduced
Solution Approach 1:
The patent segments the crimp ring structure by integrating vents as distinct features within the overall planar or convex upper surface design. This segmentation allows the surface to maintain its sealing-enhancing geometry while incorporating discrete venting pathways that do not compromise the continuous sealing surface, achieving both objectives simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively prevents leakage and safely depressurizes the dispenser at excessive temperatures, maintaining a robust seal and allowing for resealing after pressure relief, ensuring consumer safety and product integrity.
Implementation Method 1
at least one of the inner surface and the outer surface of the crimp ring may include a vent
Implementation Method 2
The upper surface may be a substantially planar surface... The upper surface may be a continuous convex surface
Data Source
AI summary
An aerosol dispenser, an outer container for an aerosol dispenser, and a preform for an outer container. The aerosol dispenser, outer container, and preform each have a neck including a crimp ring. The crimp ring may be configured to receive a valve cup, which is clinched thereto. The crimp ring includes one or more vents. The vents may be used to control overpressurization within the dispenser. The vents may be exposed to pressurized propellant and product due to deformation of the neck during undue overpressurization. The vents allow propellant and/or product to be released therethrough in the event of overpressurization.