Volumetric Metering Device for Micro-Tablet Fluidity
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Solution Overview
Problem
Existing volumetric metering technologies are not suitable for micro-tablets due to their lack of fluidity, which makes precise volumetric metering and filling challenging, especially in multiple-track operations.
Innovation Solution
A metering device with a feed container and a retaining bottom that covers transfer openings, featuring through-gaps for micro-tablets to flow through, combined with vibrating drives to enhance fluidity, allowing for efficient volumetric metering and transfer of micro-tablets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If micro-tablets are metered using conventional volumetric metering apparatuses, then the metering process is simple and straightforward, but the micro-tablets lack the required fluidity to flow through the apparatus due to their encircling edges promoting mutual wedging-together
Solution Approach 1:
The feed container bottom is segmented into multiple transfer openings, allowing micro-tablets to pass through in a controlled manner. This segmentation prevents the encircling edges of micro-tablets from wedging together by providing multiple discrete pathways, thereby maintaining product fluidity while enabling volumetric metering operation.
Solution Approach 2:
A vibratory drive is introduced as an intermediary element between the feed container and metering chambers. The vibrations generated by this drive reduce the wedging effect of micro-tablet edges and enhance their fluidity, allowing them to flow smoothly through the transfer openings into the metering chambers without requiring complex mechanical metering mechanisms.
2Measurement precision
If mechanically complex metering drums or metering wheels are used to achieve exact number-based metering of micro-tablets, then precise metering is achieved, but the device complexity increases significantly especially for multiple-track operations
Solution Approach 1:
The complex mechanical metering drums or metering wheels are replaced with a simplified volumetric metering system. Instead of using mechanically complex number-based metering mechanisms, the invention uses volumetrically specific metering chambers that receive micro-tablets through vibrations, achieving precise metering through volume control rather than complex mechanical counting mechanisms.
Solution Approach 2:
The metering approach changes from number-based mechanical counting to volume-based metering. By changing the metering parameter from discrete item counting to volumetric measurement, the system achieves precise metering of micro-tablets using simple volumetric chambers rather than complex mechanical counters, significantly reducing device complexity for multiple-track operations.
3Productivity
If flow pressure is increased to overcome the wedging tendency of micro-tablets, then more product can be pushed through, but high flow pressure promotes the formation of product bridges that interrupt the flow operation
Solution Approach 1:
A vibratory drive is applied to the feed container to generate mechanical vibrations that prevent micro-tablets from forming bridges. The vibrations keep the product in a fluidized state, allowing continuous flow through the transfer openings at moderate pressure without the formation of interrupting product bridges, thereby maintaining both productivity and flow continuity.
Solution Approach 2:
The system transitions from static high-pressure forcing to dynamic vibration-assisted flow. By applying continuous vibrations to the feed container, the micro-tablets maintain a dynamic, fluidized state that prevents bridge formation and ensures continuous flow through the transfer openings, achieving reliable productivity without the harmful effects of high static pressure.
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 solution enables disruption-free volumetric metering of micro-tablets by reducing pressure and promoting fluidity, allowing for precise and efficient transfer into target containers, even in multiple-track operations.
Implementation Method 1
a feed container disposed above the metering unit in a direction of gravity
Implementation Method 2
combined with vibrating drives to enhance fluidity
Data Source
AI summary
A metering device is for the volumetric metering of micro-tablets or the like and for transferring metered partial amounts of the micro-tablets into target containers. The metering device includes a metering unit with volumetrically specific metering chambers and a feed container, which is disposed above the metering unit in the direction of gravity. The feed container has an upper filling opening, lateral container walls and a lower container bottom with transfer openings for transferring the micro-tablets into the metering chambers. At least one retaining bottom is disposed in the feed container between the filling opening and the container bottom. The retaining bottom covers the transfer openings in the container bottom, at least one through-gap for the micro-tablets being formed at the side of the retaining bottom.