Backingless Abrasive Article with Silicone Protrusions
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Solution Overview
Problem
Abrasive articles that offer high material removal rates often compromise on surface quality, while those that achieve desirable surface characteristics have low removal rates, leading to inefficient multi-step processes and increased costs in industries like optical media and automotive paint repair.
Innovation Solution
Development of a backless abrasive article with a surface feature layer formed from a formulation of liquid silicone rubber, silica reinforcing particulate, and abrasive grains, which provides self-supporting properties and maintains performance without structural degradation, allowing for improved surface characteristics and material removal rates in a single-step process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high removal rate abrasives are used, then material removal rate is improved, but surface quality deteriorates
Solution Approach 1:
The abrasive layer is segmented into multiple discrete protrusions rather than a continuous structure. Each protrusion contains abrasive grains that can independently engage with the workpiece surface, allowing for controlled material removal while maintaining surface quality through the distributed nature of the segmented structure.
Solution Approach 2:
The abrasive protrusions are designed with specific local geometries and distributions. The protrusions have varying heights, shapes, and spacing that are optimized for their specific function of removing material while minimizing surface damage. This local optimization allows high removal rates without sacrificing surface quality.
2Manufacturing precision
If fine grain abrasives are used to achieve desirable surface characteristics, then surface quality is improved, but material removal rate decreases
Solution Approach 1:
The invention transitions from a traditional two-dimensional abrasive sheet to a three-dimensional structure with protrusions having varying heights. This dimensional change allows the abrasive to engage the workpiece at multiple levels, removing material efficiently from peaks while finer grains work on valleys, achieving both high removal rates and surface quality simultaneously.
Solution Approach 2:
The abrasive layer combines different grain sizes within the same protrusion structures. Coarser grains are positioned to handle bulk material removal, while finer grains are distributed to refine the surface. This composite approach within the abrasive layer structure allows simultaneous achievement of high removal rates and desirable surface characteristics.
3Manufacturing precision
If multi-step abrasive processes are used to achieve both high removal rates and surface quality, then surface quality is improved, but process complexity and cost increase
Solution Approach 1:
The invention merges the functions of multiple abrasive steps into a single integrated abrasive layer structure. The protrusions contain a gradient distribution of grain sizes that perform both roughing and finishing operations simultaneously, eliminating the need for separate coarse and fine abrasion steps and reducing process complexity.
Solution Approach 2:
The abrasive protrusions are designed to perform multiple functions: material removal, surface smoothing, and defect repair. By incorporating varying grain sizes and optimizing protrusion geometries, the single abrasive article achieves what traditionally required multiple specialized abrasive products, reducing both process and product 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
The abrasive article achieves enhanced surface quality with increased Gloss Performance and material removal rates, reducing the need for multiple steps and lowering operational costs, as demonstrated by improved Roughness and Gloss Performance indices in various industrial applications.
Implementation Method 1
Abrasive articles, such as coated abrasive articles and bonded abrasive articles, are used in various industries to machine work pieces, such as by lapping, grinding, or polishing
Implementation Method 2
an abrasive layer having an array of protrusions. The abrasive layer has a thickness not greater than about 100 mils. The abrasive article is free of a backing layer
Data Source
AI summary
An abrasive article includes an abrasive layer having an array of protrusions. The abrasive layer has a thickness not greater than about 500 mils. The abrasive article is free of a backing layer.