Coated Abrasive Maker Using Precision Screen for Particle Orientation
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Solution Overview
Problem
Conventional coated abrasive products face issues with the orientation and spacing of abrasive particles, leading to poor cutting performance and premature wear due to adhesive-related contamination and random distribution, especially with triangular abrasive particles on metals like stainless steel.
Innovation Solution
A coated abrasive article maker apparatus using a production tool with precisely replicated cavities complementary to the abrasive particles, eliminating the need for an adhesive layer and allowing for precise orientation and spacing of abrasive particles on a resin-coated backing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive layer is used to hold abrasive particles, then abrasive particles can be transferred to backing, but adhesive may detackify and transfer to workpiece causing contamination
Solution Approach 1:
The patent removes the adhesive layer from the system by using a screen with precisely spaced and aligned non-circular apertures that mechanically hold abrasive particles in fixed positions. The screen geometry and restricted contact ability of abrasive particles through screen openings provide retention without adhesive, eliminating the risk of adhesive detackification and workpiece contamination.
Solution Approach 2:
The screen acts as an intermediary carrier between the abrasive particle source and the backing. It precisely positions abrasive particles through its aperture geometry and transfers them to the backing through a laminated adhesive film that is removed after particle transfer, avoiding direct adhesive contact with the final abrasive article.
2Quantity of substance
If triangular abrasive particles are applied with high mineral coverage, then coating density increases, but inverted particles increase causing poor fracture and metal capping
Solution Approach 1:
The screen apertures are designed with specific geometries that locally control the orientation of each triangular abrasive particle. The aperture shape and size are matched to the particle geometry to ensure proper orientation (with the triangle's edge presented to the cutting direction) while maintaining high mineral coverage, preventing inverted particles that would cause metal capping.
3Productivity
If conventional drop coating or electrostatic coating is used, then abrasive particles are applied to backing, but random distribution and clustering occur reducing cutting performance
Solution Approach 1:
The screen is divided into numerous precisely spaced non-circular apertures that individually hold single abrasive particles. This segmentation ensures uniform spacing and prevents clustering by physically separating each particle's position, maintaining both high productivity and precise particle distribution.
Solution Approach 2:
The screen aperture pattern is precisely replicated to match the desired abrasive particle distribution pattern. The screen geometry serves as a master template that copies the ideal spacing and orientation arrangement to the final abrasive article, eliminating random distribution.
4Manufacturing precision
If precision screens with non-circular apertures are used to control orientation, then particle orientation is improved, but adhesive layer is required which adds complexity
Solution Approach 1:
The screen with precisely spaced non-circular apertures pre-positions and orients the abrasive particles in the desired configuration before transfer to the backing. This preliminary action establishes the correct particle orientation and spacing, allowing the adhesive film to be removed after transfer, simplifying the final product.
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 method enhances cutting efficiency and extends the life of abrasive articles by ensuring optimal orientation and spacing of abrasive particles, reducing mechanical reinforcement and heat buildup, and improving fracture mechanisms during grinding.
Implementation Method 1
a production tool with precisely replicated cavities complementary to the abrasive particles
Implementation Method 2
resin-coated backing
Data Source
AI summary
A coated abrasive article maker apparatus is disclosed comprising a first web path comprising a production tool and a second web path configured for a resin coated backing. The second web path is configured to guide the resin coated backing through the coated abrasive article maker apparatus with the resin layer positioned facing the dispensing surface. An abrasive particle feeder is positioned along the first web path and is configured to dispense abrasive particles onto the dispensing surface such that abrasive particles are removably disposed within cavities of the production tool. Abrasive particles are transferred from the plurality of cavities to the resin layer of the resin coated backing when the production tool is positioned adjacent the resin coated backing.