Aerosol Container Base Design for Valve Stem Protection
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Solution Overview
Problem
Conventional plastic aerosol containers are costly to manufacture and prone to damage during transport due to their thickness requirements for pressure resistance, and existing solutions do not effectively address the stability and protection of the valve stem during handling and storage.
Innovation Solution
A plastic aerosol container design featuring a base with a hemispherical configuration and a thermoformed sheet transport system that stabilizes and protects the valve stem, allowing for thinner walls and reduced material usage while maintaining pressure resistance, and utilizing a snap-coupling mechanism for secure assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the container wall is made thicker to withstand operating pressure, then the strength and pressure resistance are improved, but the manufacturing cost increases and the volume to transport increases
Solution Approach 1:
The container is divided into two main parts: a thinner-walled body and a separate, stronger base. The base is designed with enhanced structural features (such as a domed or flared configuration) to provide the necessary pressure resistance, while the main body can use thinner, less expensive material. This segmentation allows each part to be optimized independently for its specific function.
Solution Approach 2:
The base of the container is given special structural qualities (thicker material, domed shape, flared configuration) specifically where pressure resistance is most critical. The rest of the container body maintains a simpler, thinner-walled construction. This local enhancement of quality provides strength where needed without unnecessarily increasing material usage and cost throughout the entire container.
2Strength
If the container wall is made thicker to withstand operating pressure, then the strength and pressure resistance are improved, but the volume to transport increases
Solution Approach 1:
By segmenting the container into a thin-walled body and a structurally optimized base, the overall volume efficiency is improved. The base provides the necessary strength in a compact configuration, allowing the main body to be more volumetrically efficient with thinner walls.
Solution Approach 2:
The base is designed with a domed or curved configuration, which provides superior structural strength per unit volume compared to flat surfaces. This curvature allows the base to withstand pressure forces more effectively, reducing the need for additional material volume while maintaining or enhancing pressure resistance.
3Device complexity
If the valve stem is exposed during transport, then the assembly simplicity is improved, but the reliability and protection from damage deteriorates
Solution Approach 1:
The valve stem is pre-protected by the base structure before transport or handling occurs. The base includes an integrated valve stem protection element or a receiving cavity that accommodates and shields the stem, preventing damage during shipping and storage. This preliminary protective action is built into the container design itself.
Solution Approach 2:
The valve stem protection feature is nested within or integrated into the base structure. The base contains a recessed cavity or integrated protective element that houses the valve stem when not in use, protecting it from external damage while maintaining a compact overall structure.
Data Source
Figure 1
Figure 2
Figure 3~4A
AI summary
A container (1) of a fluid substance, comprising a can (2) having a neck (4) defining an opening (3), there being fastened, in a water-tight manner, to the neck (4) a valve element (5) comprising a valve cup (6) supporting a hollow stem (7) which is movable - against an elastic element (8) - between a first stable closing position and a second unstable position in which fluid is delivered through a cavity (7A) in the stem (7), the said cavity (7A) in the stem being in communication with the interior of the can (2) when the stem is in the dispensing position, the said system being characterized by the fact that the can (2) is fixed to a support base (10) of the container (1), the base comprising a support surface (14) provided with a recess (11) defined by a first centering surface (11A) configured to center the container (1) on a valve cup (6) of a further identical container, on top of which the container (1) may be placed, a second support surface (11B) for the stable support of the container (1) on the valve cup (6), and a third surface (12) recessed with respect to the second surface (11B) and configured to house and protect the stem (7) of an aerosol valve of the further container (1A).