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Unread 14-10-2010, 16:03
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Brandon Holley Brandon Holley is offline
Chase perfection. Catch excellence.
AKA: Let's bring CD back to the way it used to be
FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
Team Role: Engineer
 
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Re: pic: How 125 is rolling this year...

Quote:
Originally Posted by Bruceb View Post
So, to make the mold you just laid the master on the bottom of the mold box and poured the silicone over it? The top side of the wheel is as smoothe as the urethane was poured, correct? Or did you pour it high and machine off the excess?
Bruce

The mold "box" base was an aluminum plate with the bolt hole pattern drilled into it. This was then used to hold the master (aluminum) wheel down to the plate. I then hot glued a bucket with the bottom cut off around the wheel.

Yes, the top side is as smooth as the urethane is poured. Some of our wheels have just the poured urethane surface on top. As we tweaked the process though, we added more glass to the urethane, which resulted in a "bumpier" surface on the top. To enhance the look of the wheels we did start pouring high and machining the excess away. One of the enhancements to the process we are trying to make is to eliminate that step, although it only takes a minute or 2 for that operation per wheel.

-Brando
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MORT (Team 11) '01-'05 :
-2005 New Jersey Regional Chairman's Award Winners
-2013 MORT Hall of Fame Inductee

NUTRONs (Team 125) '05-???
2007 Boston Regional Winners
2008 & 2009 Boston Regional Driving Tomorrow's Technology Award
2010 Boston Regional Creativity Award
2011 Bayou Regional Finalists, Innovation in Control Award, Boston Regional Finalists, Industrial Design Award
2012 New York City Regional Winners, Boston Regional Finalists, IRI Mentor of the Year
2013 Orlando Regional Finalists, Industrial Design Award, Boston Regional Winners, Pine Tree Regional Finalists
2014 Rhode Island District Winners, Excellence in Engineering Award, Northeastern University District Winners, Industrial Design Award, Pine Tree District Chairman's Award, Pine Tree District Winners
2015 South Florida Regional Chairman's Award, NU District Winners, NEDCMP Industrial Design Award, Hopper Division Finalists, Hopper/Newton Gracious Professionalism Award

Last edited by Brandon Holley : 14-10-2010 at 16:11.
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