Systems, methods and tools for dispensing a different plurality of abrasive particles to prepare abrasive articles

Abstract

A system is disclosed that includes a dispensing tool, a backing, a first plurality of abrasive grains, and a second plurality of abrasive grains. The allocation tool consists of the first part and the second part. The first portion is configured to receive a first plurality of abrasive grains and pass the first plurality of abrasive grains through one or more of the plurality of slots to the backing. The second plurality of abrasive grains differs from the first plurality of abrasive grains in at least one of size, average weight, and shape. The second portion is configured to receive a second plurality of abrasive grains and pass the second plurality of abrasive grains through one or more of the plurality of slots to the backing.

Description

Background technique [0001] The present disclosure relates generally to abrasive grains, and also to tools, systems, and methods for disposing abrasive grains on a backing as part of making an abrasive article. Generally, coated abrasive articles have an abrasive layer secured to a backing. The abrasive layer contains abrasive grains and a binder that secures the abrasive grains to the backing. A general type of coated abrasive article has an abrasive layer consisting of a make coat or make coat, a size coat or coat and abrasive grains. In preparing such coated abrasive articles, a make layer precursor comprising a curable make resin is applied to a major surface of the backing. The abrasive grains are then at least partially embedded in the curable make resin, and the curable make resin is at least partially cured to adhere the abrasive grains to the major surface of the backing. A size layer precursor comprising a curable size resin is then applied over the at least parti...

AI Technical Summary

Problems solved by technology

However, electrostatic coating is more expensive than drop coating and may not be feasible for all types of abrasive grains (e.g., it may be difficult to consistently electrostatically coat relatively large abrasive grains)

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