Disc-Shaped Pressure Control Device for Packaging
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Solution Overview
Problem
Existing pressure control systems for aerosols are prone to instability and damage, require numerous parts, and are costly due to fixed volumes and sensitivity to O-ring damage, leading to inconsistent pressure release and increased production costs.
Innovation Solution
A compact, robust pressure control system using a disc-shaped mechanism with reduced parts, eliminating O-rings and allowing for variable packaging volumes with a single injection mold, featuring a disc with a closing means that integrates into the container for improved sealing and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piston with stem and O-ring is used for pressure control, then the valve mechanism can open and close the storage chamber, but the O-ring is sensitive to damage during assembly and causes instability in working pressure
Solution Approach 1:
The patent removes the O-ring from the pressure control system entirely. Instead of using a piston with stem that moves through an O-ring, the invention employs a valve mechanism where the stem directly opens or closes the storage chamber without requiring a sealing ring, thereby eliminating the source of damage sensitivity and pressure instability
Solution Approach 2:
The patent replaces the durable but complex O-ring sealing system with a simpler, more robust valve mechanism that does not rely on replaceable sealing components. The new design uses a direct-acting valve where the stem itself performs the sealing function, eliminating the need for separate O-rings that require periodic replacement
2Reliability
If a glass bell with fixed volume is used for pressure control, then the pressure can be maintained, but the volume cannot be changed and requires intensive production process with many parts
Solution Approach 1:
The patent designs a valve mechanism that can function with different storage chamber volumes without requiring different structural components. The same basic valve design can be applied to various container sizes, making the system universal and reducing the need for multiple specialized parts for different applications
Solution Approach 2:
The patent integrates the valve mechanism directly into the storage chamber structure, combining what were previously separate components (valve body, chamber walls, sealing elements) into a unified design. This merging reduces the total number of parts and simplifies the production process while maintaining pressure control functionality
3Ease of operation
If the stem moves through the O-ring for opening or closing the storage chamber, then the valve can control pressure, but rolling and friction cause detrimental effects on the life span of the pressure control system
Solution Approach 1:
The patent eliminates the O-ring component that causes friction and rolling resistance. The valve stem now moves through a clearance or direct opening without contacting a sealing ring, removing the source of friction that degraded the system over time while maintaining the opening and closing functionality
Data Source
AI summary
A pressure control device for pressure packaging based on a disc with fluid connection and a collecting basin, with associated stopper. The closing mechanism in the pressure control device is no longer based on a cylinder with a central opening in the separation wall and closing-off of the opening by means of a piston with stem. The proposal is extremely simple, compact and easy to assemble.