Gas Flow Powder Mixing Homogeneity
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Solution Overview
Problem
Existing powder mixing methods, such as shaking powders in enclosed volumes, result in heterogeneous mixes, making it difficult to achieve precise and accurate mixing, especially for small doses of drugs where reliability is crucial.
Innovation Solution
A powder mixing apparatus and method involving a dispensing device with a venturi tube and gas inlet, where a premixed powder is dispensed into a mixing cavity with a gas flow, creating a post-mixed powder through interaction, enhancing homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If powders are mixed by shaking or vigorous agitation in an enclosed volume, then the mixing process is simple to perform, but the resulting powder mixture remains heterogeneous and mixing precision is poor
Solution Approach 1:
The patent replaces traditional mechanical shaking and agitation methods with a gas flow-based mixing system. Gas is introduced through a sparging inlet to create bubbles that rise through the powder bed, providing gentle yet effective mixing action that achieves homogeneity without the harsh mechanical forces of shaking or vigorous agitation.
Solution Approach 2:
The invention uses gas flow (pneumatics) to achieve powder mixing. A gas source provides controlled gas flow through the powder mixture, utilizing bubble formation and rising motion to facilitate mixing. This pneumatic approach replaces mechanical agitation while achieving superior mixing homogeneity.
2Device complexity
If traditional powder mixing methods are used, then the equipment and process are simple, but the reliability of small drug doses is insufficient
Solution Approach 1:
The patent replaces simple mechanical shaking with a controlled gas flow system that provides reliable, consistent mixing. The gas sparging method ensures uniform distribution of drug particles throughout the powder mixture, achieving the homogeneity required for accurate small drug dosing while maintaining relatively simple equipment.
3Device complexity
If powders are mixed in an enclosed volume with agitation, then the process requires minimal equipment, but the mixing precision and uniformity are limited
Solution Approach 1:
The invention introduces gas flow through the powder mixture to achieve superior uniformity. The sparging process creates numerous small bubbles that rise through the powder, providing distributed mixing action that significantly improves homogeneity compared to simple agitation, while adding only minimal equipment complexity.
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 method significantly reduces the relative standard deviation of the powder mixture, achieving a more uniform and consistent blend, improving the accuracy and reliability of drug dosages.
Implementation Method 1
the opening includes a tube, which can be a venturi tube
Implementation Method 2
the gas and the premixed powder interact in the mixing cavity to form a post-mixed or blended powder
Data Source
AI summary
Disclosed herein are powder mixing apparatuses and methods that utilize the deagglomerizing and mixing effects of an air flow that impacts a flowing powder. The resulting powder can have smaller particle sizes and/or exhibit a more homogenous mixture than the premixed powder.