Stirring Body Height Adaptation for Gravimetric Coating Mixing
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Solution Overview
Problem
Current methods for preparing coating material compositions in the automobile industry face challenges such as manual handling, interrupted mixing during gravimetric metering, and lack of flexibility, leading to potential metering errors and safety concerns, especially when dealing with water-based paints.
Innovation Solution
A method involving continuous gravimetric metering with automated adaptation of the stirring body's position within the container based on filling level, ensuring uninterrupted mixing and optimal vortex maintenance, eliminating the need for manual parameter determination and enhancing safety by preventing exposure of the stirring body above the liquid level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If continuous stirring is performed during gravimetric metering, then mixing quality is improved, but metering precision deteriorates due to disturbance of weighing signals
Solution Approach 1:
The stirring body is made dynamically adjustable in height to adapt to changing filling levels during metering. The height of the stirring body can be continuously adapted to the respective filling level, allowing the system to maintain optimal mixing conditions while accommodating the metering process at different stages.
Solution Approach 2:
The height of the stirring body is predetermined and adjusted before metering begins. The system calculates the appropriate height based on the amount and number of components to be weighed out, ensuring the stirring body is positioned correctly before the metering process starts, thereby avoiding interference with weighing signals.
2Measurement precision
If stirring is stopped during final phase of metering, then metering precision is improved, but mixing quality deteriorates due to viscosity changes
Solution Approach 1:
The stirring body height is dynamically adjusted throughout the metering process, including the final phase. By continuously adapting the height to the filling level, the system maintains effective mixing even when the container is nearly full, preventing viscosity-related mixing issues without compromising metering precision.
3Stability of the object's composition
If absolute stirring parameters are predetermined for each batch size, then mixing quality is improved, but process flexibility deteriorates
Solution Approach 1:
The system changes the parameter of stirring body height based on the filling level and batch size. Rather than using fixed absolute parameters, the height is expressed as a relative value that adapts to different batch sizes and filling levels, maintaining mixing quality across varying production requirements.
Solution Approach 2:
The appropriate stirring body height is calculated and set in advance based on the planned batch size and number of components. This preliminary calculation ensures optimal mixing conditions are established before metering begins, while still allowing flexibility for different production scenarios.
4Stability of the object's composition
If manual determination of stirring parameters is performed, then mixing quality is improved, but preparation time deteriorates
Solution Approach 1:
The system automatically calculates and determines the appropriate stirring body height based on input parameters such as batch size and number of components. This self-service capability eliminates the need for manual experimental determination, maintaining optimal mixing conditions while significantly reducing preparation time.
Solution Approach 2:
The system uses feedback from the metering process (filling level, amount of components) to automatically adjust the stirring body height. This closed-loop approach ensures optimal mixing parameters are maintained without requiring manual intervention or time-consuming trial and error.
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 approach allows for efficient, flexible, and safe preparation of coating materials by ensuring continuous mixing and adapting to viscosity changes, reducing preparation time and errors, and improving operational safety and quality.
Implementation Method 1
continuous mixing by means of stirring is therefore not only required after all the components have been added, but already at every time when they are added, in order to ensure a constant vortex throughout this time as a result of the donut effect during the mixing
Implementation Method 2
the metering of the components is performed by weighing, i.e. by determining weights within the mixing container used for preparation
Data Source
AI summary
The present disclosure relates to a method for preparing a coating material composition or a precursor thereof, the method including at least step (1), weighing out all required components into a suitable container by means of at least one metering valve when using a gravimetric metering system, the components that are weighed out into the container being mixed by means of at least one stirring body throughout step (1) and a continuous adaptation of the position of the at least one stirring body to the respective filling level within the container taking place throughout step (1), the respective filling level being predetermined by the amount and number of components that are weighed out into the container and the position of the at least one stirring body corresponding to the height of the stirring body within the container, calculated from the bottom of the container.