Non-Contact Coating of Moving Components via Falling Slurry Flow
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Solution Overview
Problem
Small components are susceptible to surface damage and poor coating characteristics due to excessive handling during the coating process, which is not robust enough to withstand handling until after curing.
Innovation Solution
The use of a 'waterfall' (slurry fall) technique combined with a component ejection method, allowing the component to pass through a falling flow of material without handling, optionally followed by a dry powder coating, reduces handling and improves coating characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional handling methods are used to transfer small components through coating processes, then the coating process can be completed, but surface damage and poor coating characteristics occur due to excessive handling
Solution Approach 1:
The patent replaces traditional mechanical handling systems with a pneumatic conveyor system that uses air flow to transport components through the coating process. Components are suspended and moved through the coating zone without physical contact, eliminating surface damage while maintaining operational efficiency
Solution Approach 2:
The patent introduces an air cushion or pneumatic field as an intermediary between the component and the physical environment. This intermediary allows components to be transported and positioned without direct mechanical contact, protecting the coating surface during handling operations
2Manufacturing precision
If multiple coating steps are applied to small components to ensure good coating, then coating quality improves, but the process complexity and handling requirements increase
Solution Approach 1:
The patent combines multiple coating applications into a single continuous process zone. Components pass through a unified coating environment where multiple coats can be applied sequentially without removing or repositioning the component, reducing process complexity while maintaining coating quality
Solution Approach 2:
The patent establishes a continuous coating process where components move steadily through the coating zone without interruption. The pneumatic conveyor maintains continuous component flow, allowing multiple coating passes to occur in sequence without breaking the process continuity, thereby simplifying the overall system
3Productivity
If small components are handled during coating transfer, then the coating process can proceed, but surface damage occurs at a higher percentage of components
Solution Approach 1:
The patent replaces mechanical transfer mechanisms with a pneumatic conveyor system that suspends and transports components through air flow. This substitution eliminates physical contact that causes surface damage while maintaining efficient component movement through the coating process
Solution Approach 2:
The patent uses an air cushion or pneumatic field as a flexible, contactless support medium. This thin film of pressurized air acts as a protective barrier between the component and any physical surfaces, preventing surface damage during transport while allowing continuous process operation
4Strength
If in-process coatings are made robust enough to withstand handling, then handling damage is reduced, but the coating formulation and application complexity increases
Solution Approach 1:
The patent applies a preliminary protective coating or primer layer before the final coating application. This initial layer provides immediate protection during handling and transfer operations, allowing the final coating to be applied without requiring excessive robustness, thereby simplifying the overall formulation 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
This approach enhances coating quality and reduces rejects by minimizing physical handling, ensuring uniformity and quality of the coating without compromising it during the process.
Implementation Method 1
An actuator, such as a gun, is also provided for projecting the component, and thus causing it to pass through the falling flow of material as a projectile without being handled
Implementation Method 2
The landing may comprise a fluidized bed for receiving the coated component once it projects through the falling flow of material
Data Source
AI summary
An apparatus for coating an object or component includes at least one dispenser for dispensing a falling flow of material and an actuator for projecting the component through the falling flow of material. A landing may also be provided for receiving the coated projectile, the landing adapted for providing a second coating to the coated projectile. Related methods are also disclosed.