Abrasive Article With Segmented Particle Alignment and Spacing

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Solution Overview

Problem

Existing methods for applying abrasive particles to a backing in abrasive article manufacturing are inefficient, often resulting in random orientation and alignment, which can decrease the abrasive efficiency, and electrostatic coating is costly and not viable for all types of particles.

Innovation Solution

A distribution tool with sections and slots is used to load and distribute abrasive particles of different types and sizes, achieving a gross biased orientation and segregated disposition on the backing, allowing for controlled alignment and spacing of abrasive particles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If drop coating technique is used to apply abrasive particles, then the manufacturing cost is reduced, but the alignment and orientation of abrasive particles become random, decreasing abrasive efficiency

Engineering Contradiction:

Improvemanufacturing costVSAvoidalignment and orientation of abrasive particles

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The distribution tool is divided into multiple sections, with each section dedicated to distributing a specific type of abrasive particle. Each section includes walls that define slots, creating segmented pathways that guide different particle types to specific locations on the backing, enabling controlled alignment while using simple gravity-based drop coating

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different sections of the distribution tool provide different distribution characteristics tailored to specific abrasive particle types. The walls and slots in each section are configured to accommodate the specific size, shape, and flow characteristics of the particles assigned to that section, optimizing local particle arrangement for maximum abrasive efficiency

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If electrostatic coating is used to apply abrasive particles, then the alignment and orientation of abrasive particles is improved, but the manufacturing cost increases

Engineering Contradiction:

Improvealignment and orientation of abrasive particlesVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The distribution tool uses simple, inexpensive mechanical structures (walls and slots) instead of expensive electrostatic coating equipment. The tool achieves particle alignment through passive mechanical guidance during the drop coating process, providing a cost-effective alternative that eliminates the need for expensive electrostatic generators and control systems

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The distribution tool leverages the natural flow characteristics of abrasive particles and the geometry of the slots to achieve self-alignment. As particles fall through the slots, their shape and size cause them to naturally orient themselves, eliminating the need for external energy input or complex control mechanisms

Inventive Principle:

Principle #25Self-service

3Manufacturing precision

If electrostatic coating is used to apply abrasive particles, then the orientation of abrasive particles is improved, but the applicability to all types of particles is limited

Engineering Contradiction:

Improveorientation of abrasive particlesVSAvoidapplicability to different particle types

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The distribution tool is designed with multiple sections that can accommodate different types of abrasive particles, each section configured for specific particle characteristics. This multi-functional design allows the same tool to handle various particle sizes, shapes, and materials, providing universal applicability across different abrasive applications

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Each section of the distribution tool is optimized for specific particle types with tailored slot dimensions and wall configurations. This allows the system to adapt to different particle characteristics locally within each section while maintaining overall system versatility

Inventive Principle:

Principle #3Local quality

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 method and system improve the alignment and spacing of abrasive particles, enhancing the abrasive efficiency and reducing waste by minimizing particle loss, while being cost-effective compared to electrostatic coating.

Implementation Method 1

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentEP3558593B1Abrasive article with different pluralities of abrasive particles

Publication Date: 2025.10.15 3M INNOVATIVE PROPERTIES CO

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AI summary

An abrasive article includes a first plurality of abrasive particles and a second plurality of abrasive particles. The first plurality of abrasive particles differ in at least one of a size, an average weight and a shape from the second plurality of abrasive particles. The first plurality of abrasive particles are spaced from the second plurality of abrasive particles by at least a minimum distance in the x-axis direction, and both the first plurality of abrasive particles and the second plurality of abrasive particles extend in similar paths to one another with respect to the y-axis.