Vortex Mixing Nozzle for Polyurethane Foam Ratio Adjustment
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Solution Overview
Problem
Portable low-pressure two-part polyurethane spray foam systems face issues with clogged static mixers, disposable tips, inability to check and adjust fluid ratios, and the need for field refilling of canisters, as well as a lack of efficient mixing and spraying mechanisms.
Innovation Solution
A vortex mixing and ratio adjustment system with a mixing nozzle featuring a vortex aperture and mixing chamber, connected to dual triggers for independent fluid dispensing and air-induced mixing, allowing for on-site refilling and adjustment of fluid ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If disposable tips are used, then ease of operation is improved, but loss of substance increases due to frequent replacement and waste
Solution Approach 1:
The spray gun is divided into separable components: a reusable body and replaceable tips. This allows the tip to be easily replaced when clogged while maintaining the investment in the main body, resolving the contradiction between ease of operation and substance loss.
Solution Approach 2:
The system allows selective discarding of only the tip component when clogged, while recovering and reusing the main spray gun body. This minimizes substance loss by avoiding complete disposal of the entire spray gun system.
2Productivity
If static mixers are used, then mixing function is improved, but reliability deteriorates due to clogging within 20-30 seconds
Solution Approach 1:
The mixer transitions from a static design to a dynamic vortex-induced mixing system. The vortex aperture creates rotational flow that continuously mixes chemicals without relying on static mixer components that are prone to clogging, thereby improving reliability while maintaining productivity.
3Ease of operation
If field refilling of canisters is enabled, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The system enables field refilling by providing a refilling mechanism that allows operators to refill canisters on-site without external assistance. This self-service capability improves ease of operation while the modular design keeps the added complexity manageable.
4Adaptability or versatility
If ratio adjustment capability is added, then adaptability is improved, but device complexity increases
Solution Approach 1:
The dual trigger system provides feedback to operators about fluid flow ratios, allowing them to adjust mixing ratios in real-time. This feedback mechanism improves adaptability to different application requirements while keeping the control system relatively simple through direct mechanical feedback rather than complex electronic controls.
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
Enables efficient mixing and spraying of polyurethane foam by ensuring proper fluid ratios and allowing for field refilling of canisters, reducing waste and improving application efficiency.
Implementation Method 1
a vortex mixing and ratio adjustment system 10, comprising: a mixing nozzle 100 having a vortex aperture 175
Implementation Method 2
a fluid displaced from said supply line aperture 200 under pressure forces any matter entering said mixing chamber 115 to mix at a high speed
Data Source
AI summary
A matter displacement and mixing system having a mixing chamber for material to enter, and a vortex aperture that directs air into the mixing chamber at either a high velocity for violent shearing or lower velocity for gentle mixing. This would depend on the shape of the vortex aperture, or the pressure.