[rp-ml] Question for Moldflow (and similar) users about famous molding case

From: Alex Do (do@oxy.edu)
Date: Mon Sep 12 2005 - 08:40:34 EEST

There is a famous case about the Oral-B CrossAction toothbrush that was
published in Mechanical Engineering 2001 ... basically after all the fancy
design when they went to mold the part, it unexpectedly warped 0.2" after
cooling. To solve the problem they re-designed the part with a counter warp
so that when it cooled it took its intended shape.
I've been unable to test out mold analysis software (can't get a license),
but I wonder would it have solved or quantitatively predicted that problem?
It seems like they still would have needed to see how much it warped by to
make an educated guess about how to redesign the part.
Thanks for the feedback ... just gathering data for a paper on SL injection
molding I'm writing.
Alexander Do
Research Assistant
Ford Prototyping Studio
University of California, Berkeley
http://kingkong.me.berkeley.edu <http://kingkong.me.berkeley.edu/>
2117 Etcheverry Hall
Berkeley, CA 94720-1750
(510) 643 9486

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