Static Mixer for High-Pressure Droplet Jetting
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Solution Overview
Problem
Current methods for mixing two-component adhesives cannot facilitate the discharge of the mixed medium in droplet form through jetting due to the limitations of static mixers operating at low pressure and being unpressurized at the nozzle, preventing precise metering and alternate component supply.
Innovation Solution
A method and apparatus that utilize a static mixer with alternating component supply, independent pump control, and a mixing valve to ensure precise metering and mixing ratios, allowing for the dispensing of droplets of equal size at high frequency, enabling the mixing of components in cycles and high-pressure introduction to achieve desired mixing ratios and efficient jetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If components are supplied simultaneously to the static mixer, then mixing occurs, but precise metering and control of mixing ratios cannot be achieved
Solution Approach 1:
The patent implements periodic action by supplying components alternately in cycles rather than simultaneously. The mixing valve switches between components in a periodic manner, allowing precise metering of each component while maintaining continuous mixing operation. This periodic supply pattern enables accurate control of mixing ratios through controlled alternation between component supply phases.
2Ease of operation
If the static mixer operates at low pressure, then component supply is simple, but droplet jetting discharge is not possible
Solution Approach 1:
The patent applies dynamics by transitioning the static mixer from low-pressure operation to high-pressure operation. The mixer is designed to withstand and operate at elevated pressures, enabling the mixed medium to be discharged as droplets through jetting. This dynamic pressure increase maintains mixing functionality while adding the capability for precise droplet dispensing.
3Measurement precision
If components are supplied alternately in cycles, then precise metering is achieved, but mixing time increases
Solution Approach 1:
The patent maintains continuity of useful action by ensuring that while one component is being supplied, the mixing process continues without interruption. The static mixer continuously mixes components as they flow through, and the periodic supply pattern is overlaid on continuous mixing operation. This eliminates idle time between supply cycles and maintains productive mixing throughout the process.
4Productivity
If high pressure is applied to the static mixer, then droplet jetting is enabled, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the static mixer to serve multiple functions: it performs mixing at high pressure and simultaneously acts as a pressure-resistant discharge device for droplet jetting. The mixing valve is designed to handle high-pressure operation while maintaining its metering and switching functions. This multi-functionality reduces the need for separate pressure control components and simplifies the overall system.
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 precise metering and mixing ratios, allowing for the efficient dispensing of two-component adhesives in droplet form, facilitating rapid application of points, lines, or areas with adhesive, and accommodating adhesives with short pot lives through automated operation and quick-release mechanisms.
Implementation Method 1
The pressure at which each component is introduced into the mixer can hereby be set to a desired value separately for each component so that both components are available at a desired pressure at the inlet of the mixer
Data Source
AI summary
In a method for mixing two liquid components of a medium with the aid of a static mixer, the two components are supplied to the static mixer, are mixed therein and are subsequently dispensed from the mixer. In this respect, only one respective component is supplied to the mixer, while the other component is not supplied to the mixer.