Spray Gun Assembly for Short Pot-Life Coatings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing techniques for applying coatings with plural components face challenges due to the short pot-life of the mixed materials, which limits the volume that can be applied and requires frequent mixing, leading to inefficiencies and potential corrosion issues.
Innovation Solution
The development of a spray gun assembly that includes a nozzle with specific air flow paths and feed inlets for a colloidal suspension component and a catalyst component, allowing for continuous agitation and on-demand mixing of the components using compressed air, enabling efficient application of coatings with short pot-life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual mixing of small quantities is used, then the coating can be applied, but the productivity is low due to frequent mixing and small application volume
Solution Approach 1:
The system divides the coating components into separate storage containers (colloidal suspension component and catalyst component) that are transported independently to the spray gun. This segmentation allows continuous supply of both components without requiring frequent manual mixing, thereby improving productivity while reducing time loss.
Solution Approach 2:
The spray gun assembly continuously mixes and applies the coating components as they are supplied from the storage containers. The continuous flow paths and mixing mechanism ensure that the coating application process operates continuously without interruption for remixing, maintaining high productivity and eliminating time losses associated with frequent mixing cycles.
2Reliability
If small volume mixing is used, then the short pot-life is managed, but the device complexity increases due to multiple containers and feed systems
Solution Approach 1:
The system combines multiple functional elements into an integrated spray gun assembly that includes both component storage containers, feed systems, and mixing mechanism in a single unit. This merging reduces the overall system complexity compared to separate manual mixing and application systems, while maintaining reliable coating application and preventing corrosion through proper mixing.
Solution Approach 2:
The spray gun assembly performs multiple functions: storing components, transporting them via gravity feed, mixing them in precise ratios, and applying the coating. This multi-functionality reduces the need for separate equipment for each operation, thereby reducing device complexity while ensuring reliable coating application that prevents corrosion.
3Ease of operation
If components are mixed in advance, then application is simplified, but the colloidal suspension particles settle and coating quality deteriorates
Solution Approach 1:
The system prepares the coating components for application by maintaining them in separate storage containers ready for immediate use. The gravity feed systems are pre-configured to deliver components to the mixing zone, and the spray gun is pre-assembled with all necessary components. This preliminary preparation simplifies the application process while avoiding premature mixing that would cause particle settlement.
Solution Approach 2:
The gravity feed system acts as an intermediary mechanism that transports the colloidal suspension component from the storage container to the mixing zone without causing agitation or settlement. The controlled gravity-driven flow maintains suspension stability during transport while enabling easy operation of the coating application 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
This solution allows for the efficient application of coatings with short pot-life over larger areas, reducing waste and the need for frequent mixing, while maintaining the integrity of the coating and preventing corrosion issues.
Implementation Method 1
initiating atomization of the colloidal suspension component in response to the compressed air flowing through the atomizing air flow path
Implementation Method 2
atomizing the catalyst component after exiting the fan air outlet and in response to compressed air flowing through the fan air flow path and out the fan air outlet of the nozzle
Implementation Method 3
The colloidal feed inlet in fluid communication with a gravity feed container and configured to receive a colloidal suspension component of the coating via gravity feed from the gravity feed container
Data Source
AI summary
A spray gun assembly for applying a coating with plural components includes a nozzle, a main pneumatic inlet, an atomizing air flow path, a fan air flow path, a colloidal feed inlet, an internal atomizing outlet, a pressurized feed inlet, and a catalyst outlet. The nozzle includes a main atomizing outlet and a fan air outlet. The main pneumatic inlet receives compressed air from a compressed air source. The colloidal feed inlet receives a colloidal suspension component of the coating via gravity feed from a gravity feed container. The pressurized feed inlet receives a catalyst component of the coating from a pressurized feed container. The catalyst outlet expels the catalyst component in the fan air flow path proximate the nozzle. A method for applying a coating with plural components is also provided. A system includes the gravity feed container, the pressurized feed container and the spray gun assembly.