Multiplexed Abrasive Structures for Grinding Efficiency

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Solution Overview

Problem

Conventional methods for coating abrasive particles, such as drop coating and electrostatic coating, result in random distribution and clumping, leading to poor cutting performance and heat buildup due to improper alignment and orientation of shaped abrasive particles.

Innovation Solution

A production tool with cavities designed to hold multiple shaped abrasive particles allows for precise positioning and rotational orientation, forming multiplexed abrasive structures that are transferred onto a coated backing to create a patterned abrasive layer with predetermined spacing and orientation, enhancing grinding efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional electrostatic coating or drop coating methods are used to apply abrasive particles, then the coating process is simple and fast, but the abrasive particles are randomly distributed and clump together, resulting in poor alignment and orientation

Engineering Contradiction:

Improvecoating speedVSAvoidabrasive particle spacing and orientation control

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The invention divides the abrasive layer into multiple discrete layers, with each layer containing abrasive particles at specifically controlled positions and orientations. This segmentation allows precise control of particle placement while maintaining production efficiency through systematic layering

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention pre-determines the positions and orientations of abrasive particles in each layer before actual coating. By planning the abrasive particle arrangement in advance and using automated placement mechanisms, the system achieves precise spacing and orientation control without sacrificing coating speed

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If abrasive particles are randomly distributed, then the coating process is simple, but clumping occurs leading to poor cutting performance and heat buildup

Engineering Contradiction:

Improvecoating process simplicityVSAvoidcutting performance consistency

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The invention introduces an intermediary structured layer between the backing and the abrasive particles, which serves as a template or guide for precise particle placement. This intermediary structure ensures uniform distribution and proper orientation while maintaining manufacturing simplicity through standardized layer construction

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention systematically varies parameters such as layer thickness, particle size, and inter-layer spacing to optimize both manufacturing ease and cutting performance. By controlling these parameters across multiple layers, the system prevents clumping while maintaining process simplicity

Inventive Principle:

Principle #35Parameter changes

3Productivity

If shaped abrasive particles are used with specific orientation, then cutting efficiency improves, but precise positioning and orientation control becomes complex

Engineering Contradiction:

Improvecutting efficiencyVSAvoidpositioning and orientation control system

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention segments the oriented abrasive particles into discrete layers, where each layer maintains consistent particle orientation relative to the cutting direction. This segmentation simplifies the orientation control problem by handling it layer-by-layer rather than requiring complex three-dimensional positioning

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention controls abrasive particle orientation by utilizing the layer dimension, where each layer is oriented at a specific angle relative to the cutting direction. This dimensional approach to orientation control simplifies the positioning system compared to attempting to control orientation in three dimensions simultaneously

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 improves grinding performance by ensuring optimal alignment and orientation of abrasive particles, reducing grain dulling and heat buildup, and achieving superior cutting efficiency compared to random distributions.

Implementation Method 1

Conventional methods for coating abrasive particles, such as drop coating and electrostatic coating

Methodology Applied

Scientific EffectElectrostatic coating: Electrostatic Deposition

Data Source

PatentUS11707816B2Coated abrasive article with multiplexed structures of abrasive particles and method of making

Publication Date: 2023.07.25 3M INNOVATIVE PROPERTIES CO

AI summary

The method generally involves the steps of filling the cavities in a production tool each with an individual abrasive particle. Aligning a filled production tool and a resin coated backing for transfer of the abrasive particles to the resin coated backing. Transferring the abrasive particles from the cavities onto the resin coated backing and removing the production tool from the aligned position with the resin coated backing. Thereafter the resin layer is cured, a size coat is applied and cured and the coated abrasive article is converted to sheet, disk, or belt form by suitable converting equipment.