Gravity-Feed Spray Coating for Lapping Plate Uniformity
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Solution Overview
Problem
Existing methods for coating lapping plates used in abrasive processes, such as those for sliders made of ceramic materials, face inefficiencies in applying and curing abrasive compositions, leading to non-uniform coatings and increased process times.
Innovation Solution
A method and apparatus utilizing an aqueous composition comprising solid resin powder, abrasive particles, and an aqueous carrier, applied via a spray nozzle system where the composition flows due to gravity, allowing for a batch process with controlled viscosity and minimal residual material, enhancing the formation of a uniform abrasive layer on the lapping plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional coating methods are used for lapping plates, then the coating process can be completed, but the coating uniformity deteriorates and process time increases
Solution Approach 1:
The patent employs a spray nozzle device that utilizes pneumatic principles to atomize and deposit the aqueous composition onto the lapping plate platen. The spray system delivers the coating material in a controlled aerosol form, ensuring uniform distribution across the surface while reducing application time compared to traditional manual or brush-based methods.
Solution Approach 2:
The patent specifies controlling the viscosity of the aqueous composition to enable proper flow from the container to the spray nozzle device. By optimizing parameters such as viscosity, particle size distribution, and spray pressure, the system achieves uniform coating deposition while maintaining efficient process throughput.
2Stability of the object's composition
If high viscosity composition is used, then the composition can maintain structure, but the flow to spray nozzle device deteriorates
Solution Approach 1:
The patent carefully controls the viscosity parameter of the aqueous composition to balance structural stability with flowability. The composition is formulated to have sufficient viscosity to maintain particle suspension and structural integrity in the container, while remaining fluid enough to flow under gravity to the spray nozzle device for uniform application.
3Device complexity
If manual coating methods are used, then the equipment complexity is low, but the coating uniformity and productivity deteriorate
Solution Approach 1:
The patent employs a spray nozzle device that utilizes pneumatic principles to atomize and deposit the aqueous composition onto the lapping plate platen. The spray system delivers the coating material in a controlled aerosol form, ensuring uniform distribution across the surface while reducing application time compared to traditional manual or brush-based methods.
4Quantity of substance
If excessive coating material is applied, then the coating coverage is sufficient, but the material waste increases
Solution Approach 1:
The spray nozzle device delivers the aqueous composition in a controlled aerosol form, allowing precise deposition of the coating material only where needed on the lapping plate platen surface. This atomized spray application minimizes overspray and material waste while ensuring complete and uniform coverage of the required area.
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 enables efficient, uniform coating of lapping plates with a durable abrasive layer, reducing process time and minimizing material waste, while maintaining desirable chemical and mechanical resistance for various lapping processes like rough, fine, and kiss lapping.
Implementation Method 1
the aqueous composition has a viscosity so that the aqueous composition can flow from the container to the spray nozzle device due to gravity
Implementation Method 2
spraying a second volume of the aqueous composition onto an underlying lapping plate platen to form a layer of an aqueous composition on the surface of the platen
Data Source
AI summary
The present disclosure involves apparatuses and methods for coating a lapping plate with an aqueous composition. The apparatus can be configured and the aqueous composition can be formulated so that the aqueous composition can flow to a spray nozzle device solely due to gravity in a batchwise manner.