Hydrodynamic Cavitation for Additive Manufacturing Powder
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Solution Overview
Problem
Traditional powder and composite production processes, such as milling and ultrasonication, are inefficient and can irreversibly damage polymers, leading to poor particle packing and morphology changes, which are not suitable for additive manufacturing.
Innovation Solution
A hydrodynamic cavitation process is applied to raw materials containing polymers and functional materials to reduce particle size and achieve uniform dispersion, using a cavitation machine with heating elements to control temperature and pressure, facilitating the formation of product materials with desired properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional milling equipment is used to produce powders and composites, then particle size reduction is achieved, but the morphology of material components is undesirably changed and polymer damage occurs
Solution Approach 1:
The patent replaces traditional mechanical milling systems with a hydrodynamic cavitation system that uses fluid dynamics and cavitation bubbles to achieve particle size reduction. The cavitation process uses controlled collapse of bubbles to generate localized mechanical effects that are less damaging to polymer structures compared to conventional ball milling or jet milling mechanisms.
Solution Approach 2:
The invention changes the physical parameters of the processing system by using controlled temperature, pressure, and cavitation intensity parameters. By carefully controlling these parameters, the process achieves particle size reduction while maintaining polymer integrity, as the cavitation effects can be tuned to be less aggressive than traditional mechanical milling.
2Productivity
If traditional ultrasonication mixing is used, then composite production is achieved, but particle packing efficiency is poor and polymer damage occurs
Solution Approach 1:
The patent replaces traditional ultrasonication mixing with hydrodynamic cavitation, which uses fluid flow and cavitation bubble collapse rather than direct mechanical vibration. This substitution achieves better particle dispersion and packing because the cavitation process creates more uniform localized mixing zones that prevent particle aggregation while maintaining polymer structure.
3Manufacturing precision
If hydrodynamic cavitation process is applied, then particle size is reduced and uniform dispersion is achieved, but heating of the chamber is required to control the process
Solution Approach 1:
The invention uses controlled heating to change the temperature parameter of the raw material before and during cavitation processing. By pre-heating the material to a controlled temperature, the process achieves better cavitation effects and more uniform particle size reduction. The temperature control is integrated into the system design, making it a managed parameter rather than an uncontrolled variable.
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 process effectively de-agglomerates and disperses functional materials, producing product materials with smaller particle sizes and improved uniformity, suitable for additive manufacturing techniques like stereolithography, selective laser sintering, and fused filament fabrication, while maintaining the integrity of polymer constituents.
Implementation Method 1
applying a hydrodynamic cavitation process to the raw material to produce a product material
Implementation Method 2
heating a chamber of a cavitation machine to a first temperature selected to be greater than a melting temperature of the raw material
Implementation Method 3
cooling the product material to a second temperature selected to be lower than the melting temperature of the product material
Data Source
AI summary
Provided in one implementation is a method that includes introducing a volume of raw material into a chamber of a cavitation machine. The raw material can include a mixture comprising a powder and a solvent. The powder can have a first average particle size in the raw material. The method includes applying a hydrodynamic cavitation process to the raw material to produce a product material. The powder can have a second average particle size, smaller than the first average particle size, in the product material. The method includes causing the product material to exit the cavitation chamber and drying the product material to remove the solvent. Apparatus employed to apply the method are also provided.