Ultrasonic Screw-Nut Foil Grinding for Nanoparticle Production
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Solution Overview
Problem
Conventional methods for producing nanoparticles are expensive, time-consuming, and prone to contamination, necessitating a non-expensive, fast, and clean method for their production.
Innovation Solution
A method involving a foil-covered screw and nut assembly, where the foil is wrapped around the screw's external threads, and the assembly is vibrated using an ultrasonic transducer to grind the foil, producing nanoparticles through mechanical erosion, with the vibration frequency ranging from 20 KHz to 40 KHz and utilizing an ultrasonic booster to increase amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (ball milling, arc plasma spray, laser ablation) are used to produce nanoparticles, then nanoparticles can be produced, but the process becomes expensive and time-consuming
Solution Approach 1:
The patent applies ultrasonic vibration to the screw-nut assembly at frequencies between 20-40 KHz to generate intense mechanical erosion that rapidly produces nanoparticles. This vibrational mechanism replaces conventional slow mechanical grinding methods, achieving fast nanoparticle generation without requiring expensive equipment like lasers or plasma generators.
Solution Approach 2:
The patent replaces complex mechanical systems (ball milling apparatus, laser ablation equipment, arc plasma generators) with a simple ultrasonic-driven screw-nut mechanical erosion system. This substitution maintains nanoparticle production capability while dramatically reducing equipment complexity, cost, and production time.
2Reliability
If conventional methods are used to produce nanoparticles, then nanoparticles can be produced, but contamination occurs during the process
Solution Approach 1:
The patent extracts the foil material directly into nanoparticles through ultrasonic vibration-induced erosion, eliminating the need for intermediate processing steps, chemical reagents, or complex purification equipment. This direct extraction method produces high-purity nanoparticles by avoiding contact with potential contaminants from conventional processing equipment and chemicals.
Solution Approach 2:
The ultrasonic vibration system performs both the erosion and nanoparticle separation functions in one integrated process. The vibrational energy automatically breaks down the foil into nanoparticles that are naturally separated from the screw-nut assembly, providing self-contained nanoparticle production without external contamination sources.
3Productivity
If expensive equipment like laser ablation or arc plasma spray is used, then nanoparticles can be produced efficiently, but the cost increases significantly
Solution Approach 1:
The patent uses inexpensive, easily replaceable components (standard screw, nut, and foil) instead of expensive, complex equipment. The foil acts as a consumable material that is eroded into nanoparticles, while the screw-nut assembly remains as a simple, reusable mechanical structure. This approach eliminates the need for costly lasers, plasma generators, or specialized milling equipment.
Solution Approach 2:
The patent replaces expensive high-energy equipment (laser ablation systems, arc plasma spray apparatus) with a simple ultrasonic mechanical erosion system. The ultrasonic transducer provides the necessary energy at a fraction of the cost of laser or plasma equipment, while the screw-nut assembly provides the mechanical erosion function using only standard mechanical components.
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
This method efficiently produces high-purity nanoparticles with controlled size, reducing production time and costs while minimizing contamination, as evidenced by the production of aluminum and copper nanoparticles.
Implementation Method 1
vibrating one of the nut and the foil covered screw along a first axis... vibrating the one of the nut and the foil covered screw with a frequency between 20 KHz and 40 KHz... transmitting an ultrasonic vibrational wave to the one of the nut and the foil covered screw
Implementation Method 2
grinding the foil between the internally threaded section of the inner surface of the nut and the externally threaded section of the outer surface of the screw by vibrating one of the nut and the foil covered screw
Data Source
AI summary
A method and a system for producing nanoparticles. The method includes obtaining a foil covered screw by wrapping a foil around an externally threaded section of an outer surface of a screw, placing the foil between an internally threaded section of an inner surface of a nut and the externally threaded section of the outer surface of the screw by screwing the foil covered screw into the nut, and grinding the foil between the internally threaded section of the inner surface of the nut and the externally threaded section of the outer surface of the screw by vibrating one of the nut and the foil covered screw along a first axis. The system includes a foil covered screw, a nut with an internally threaded section, and an ultrasound transducer. The nut and the screw are configured to grind the foil between the internally threaded section of the nut and the externally threaded section of the screw responsive to one of the nut and the screw vibrating along the first axis.