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RESEARCH PAPERS

The Effect of Particle Feed Rate on the Plastic Media Blast Jet

[+] Author and Article Information
M. J. McIntosh

Energy Systems Division, Argonne National Laboratory, Argonne, IL 60439

J. Eng. Ind 114(4), 435-440 (Nov 01, 1992) (6 pages) doi:10.1115/1.2900695 History: Received January 01, 1991; Online April 08, 2008

Abstract

Paint removal from military aircraft is often done by plastic media blasting (PMB): the use of plastic grit in a conventional blast jet. However, there is some concern that PMB will cause damage. To help in evaluating this possibility, a “time of flight” meter is used to measure particle velocity in the jet, as a function of air pressure, distance from the nozzle, and particle feed rate, F. Using the data and a momentum balance, a semi-empirical model relating these variables is developed and used for analysis of the effect of F on the intensity of kinetic energy delivery, E, to a work piece. The analysis shows that F has several important effects on E. These methods and results will be useful for damage studies and in production work.

Copyright © 1992 by The American Society of Mechanical Engineers
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