Pressurised Can Inner Sleeve Sealing via Clamped Disk
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Solution Overview
Problem
Existing pressure cans for two-component systems face complex construction and assembly, sealing issues due to pressure differences, and unreliable closure of the inner sleeve, leading to potential clogging and reduced product quality.
Innovation Solution
A pressure can design featuring a conventionally manufactured frame with a dome valve, a base, and an inner sleeve equipped with a sealing disk and a plunger system, where the sealing disk is clamped onto the inner sleeve using a metal washer with sharp edges, eliminating the need for additional seals and allowing for easy pressure equalization and reliable closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex sealing system with multiple seals is used to prevent leakage between outer chamber and inner sleeve, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The patent removes the complex multi-seal system from the pressure can design. Instead of using multiple seals to prevent leakage between the outer chamber and inner sleeve, the invention extracts the sealing function by making the inner sleeve open at the base, allowing direct pressure equalization through the plunger mechanism without requiring additional sealing components.
Solution Approach 2:
The plunger acts as an intermediary element that mediates between the inner sleeve and outer chamber. Rather than using seals to prevent interaction, the plunger provides a controlled interface that allows pressure equalization while maintaining the structural simplicity of the design.
2Stability of the object's composition
If the inner sleeve is sealed completely without air to maintain pressure, then pressure stability is improved, but sealing problems arise due to pressure differential causing prepolymer penetration and hardened deposits
Solution Approach 1:
The patent converts the harmful pressure differential into a beneficial feature. Instead of trying to eliminate the pressure difference between inner and outer chambers, the design accepts it and uses the plunger to provide controlled pressure equalization. This approach prevents the harmful effect of prepolymer penetration and hardened deposits while maintaining pressure stability during storage.
Solution Approach 2:
The plunger mechanism provides preliminary pressure equalization before the harmful penetration and hardening can occur. By establishing a controlled interface that allows pressure balance, the system prevents the formation of hardened deposits in seals and valve areas before they can cause clogging or malfunction.
3Reliability
If a rod is used to eject the lid of the auxiliary container against high internal pressure, then closure reliability is improved, but ease of operation deteriorates due to laborious ejection requiring complex sealing system
Solution Approach 1:
The patent extracts the complex ejection mechanism and sealing system from the design. Instead of using a rod to force the lid against high internal pressure, the invention removes the auxiliary container lid ejection function entirely, replacing it with a simpler plunger-based system that provides reliable closure without laborious operation.
Solution Approach 2:
Rather than forcing the closure against pressure (the conventional approach), the patent inverts the approach by allowing the pressure to work with the closure mechanism. The plunger is designed to engage with the inner sleeve in a way that utilizes pressure equalization to achieve reliable closure, making the operation easier and more reliable.
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
The design ensures a tight and captive inner sleeve assembly, mitigates sealing problems, and facilitates reliable separation of the closure, preventing clogging and ensuring consistent product quality by maintaining pressure within the inner sleeve.
Implementation Method 1
the pressure differential that automatically builds up between the outer chamber and the inner sleeve after filling with propellant gas
Implementation Method 2
allowing the contents of the outer chamber to enter the chamber of the inner sleeve below the plunger and equalize the pressure via the plunger
Data Source
Figure 1a~2
Figure 3~5
Figure 6
AI summary
A pressure can (1) for two-component aerosol systems, in particular for 2K assembly foam systems, comprising a frame (2), a valve arranged in a dome, a base (3) and an inner sleeve (5) arranged on the base (3), wherein the inner sleeve (5) is equipped with a cylindrical sleeve wall (6), a closure (7), a base element (8) and a plunger (9) slidably arranged in the inner sleeve (5) and with its end projecting through the base element (8), and the base element (8) has a guide (10) for the plunger (9) and a retaining part (11) which is guided through and fixed to the base (3) of the pressure can (1), wherein the plunger (9) interacts with a release element (20) arranged outside the pressure can, wherein the inner sleeve (5) is closed on the closure side by a clamped sealing disc which can be pierced and/or pushed out by the plunger (9).