Mixed Fluid Metering With Transducer Feedback for Ratio Accuracy
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Solution Overview
Problem
Current mixed fluid delivery systems for spray paint operations face challenges in achieving accurate and repeatable mixing ratios due to manual errors and the need for frequent calibration, leading to inefficiencies and potential damage to the paint application system.
Innovation Solution
A mixed fluid delivery system utilizing a positive displacement fluid cylinder with a linear transducer and controller to accurately control the ratio of paint to catalyst, allowing for quick and convenient calibration of fluid flow sensors, eliminating slip issues and enabling precise resin to catalyst ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual mixing of constituents is used, then the system is simple and flexible, but the repeatability and accuracy of mixing ratios are substantially limited
Solution Approach 1:
The patent replaces manual mechanical mixing with an automated system that uses flow meters to electronically control and measure the mixing ratios of constituents. This substitution of mechanical manual operation with electronic automation directly improves measurement precision while accepting increased device complexity.
Solution Approach 2:
The system incorporates flow meters that provide feedback on the actual flow rates of constituents, allowing the control system to adjust and maintain accurate mixing ratios. This feedback mechanism ensures repeatability and precision in mixing ratios by continuously monitoring and correcting deviations.
2Measurement precision
If automatic mixing devices with multiple electro-mechanical flow meters are used, then mixing ratio control is improved, but frequent calibration is required and system complexity increases
Solution Approach 1:
The patent employs a single multi-functional flow meter that can measure both the resin flow and catalyst flow, eliminating the need for multiple separate flow meters. This universal device reduces calibration requirements and time while maintaining ratio repeatability, as one device needs to be calibrated rather than multiple devices.
Solution Approach 2:
The system merges the function of multiple flow meters into a single flow meter that handles both fluid measurements. This consolidation reduces the number of calibration operations needed and simplifies the overall system, directly addressing the time loss associated with frequent calibration of multiple devices.
3Reliability
If bulk batching of materials is performed to avoid running short, then material availability is ensured, but substantial waste occurs
Solution Approach 1:
The system dynamically adjusts the flow rates of constituents based on real-time measurements and control signals, allowing precise delivery of the exact amounts needed. This dynamic control eliminates the need for bulk batching and ensures material availability only for the required quantity, thereby preventing waste.
Solution Approach 2:
The automated system self-regulates the material delivery by using flow meters and control mechanisms to provide the precise amount of each constituent needed for the current operation. This self-service capability ensures material availability without requiring excessive inventory, thus avoiding waste.
4Manufacturing precision
If incorrect mixing ratios are used, then the paint system becomes inoperable or produces unacceptable finish, but correcting this requires cleaning and retreating parts
Solution Approach 1:
The flow meters provide continuous feedback on the actual mixing ratios being delivered, allowing the control system to detect and correct deviations before they result in unacceptable finish quality. This real-time feedback prevents the need for rework by ensuring accurate mixing ratios throughout the operation.
Solution Approach 2:
The automated electronic control system replaces manual mixing operations, providing consistent and repeatable mixing ratios that eliminate human error. This substitution ensures manufacturing precision in finish quality and prevents productivity loss from rework by maintaining accurate ratios throughout the painting process.
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 system ensures accurate and efficient delivery of mixed fluids with reduced waste and increased operational efficiency, allowing for quick verification of system integrity and minimizing the risk of producing unacceptable paint layers.
Implementation Method 1
A transducer is configured to monitor operation of the positive displacement fluid cylinder
Data Source
AI summary
An apparatus and method for operating and calibrating a paint mixture delivery system includes a positive displacement fluid cylinder and a linear transducer that monitors operation of the positive displacement fluid cylinder. A controller is connected to a servo drive whose operation manipulates the performance of the positive displacement fluid cylinder. Operation of the fluid delivery system is controlled such that the ratio of paint or resin to catalyst or hardener can be accurately controlled and calibration of the discrete fluid flow sensors can be quickly and conveniently calibrated to assure delivery of the respective fluids are the desired mixture ratio.