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Abrasives

Notes

*05/13/2014 
from 1/25/2013

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Abrasives: Applications

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Notes

2.  “An abrasive is a material, often a mineral, that is used to shape or finish a workpiece through rubbing which leads to part of the workpiece being worn away. While finishing a material often means polishing it to gain a smooth, reflective surface it can also involve roughening as in satin, matte or beaded finishes.

Abrasives are extremely commonplace and are used very extensively in a wide variety of industrial, domestic, and technological applications. This gives rise to a large variation in the physical and chemical composition of abrasives as well as the shape of the abrasive. Common uses for abrasives include grinding, polishing, buffing, honing, cutting, drilling, sharpening, lapping, and sanding (see abrasive machining). (For simplicity, "mineral" in this article will be used loosely to refer to both minerals and mineral-like substances whether man-made or not.)

Files act by abrasion but are not classed as abrasives as they are a shaped bar of metal. However, diamond files are a form of coated abrasive (as they are metal rods coated with diamond powder).”

(Abrasives, Wikipedia, 1/25/2013)

1.  “Many types of abrasive tools, such as centerless grinding wheels for example, have been manufactured using a compression molding process to form the outer abrasive surface of the wheel. Large presses involving heat and high pressures, such as 1,000 to 10,000 psi, are employed to compact a powdered composition comprising a resin, metal or ceramic binder, filler materials and superabrasive particles, such as diamonds, for one example, in a mold.

The largest number of such abrasive grinding wheels comprise a resin bonding composition with a variety of such compositions well-known to those skilled in the art and designed for particular applications or as a matter of designer's choice.”

(Peterman and Vernik, US Patent 6,357,030, 1/22/2013)

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Interested!!
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(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
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E-Mail: cornelrd@bee.net  

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Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 1/25/2013.