Mailing List lml@lancaironline.net Message #24647
From: Gary Rodgers <gcrodgers@sympatico.ca>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: re- LNC2 Flap twist
Date: Tue, 03 Aug 2004 12:29:04 -0400
To: <lml@lancaironline.net>
Bill;
 
You probably can remove the twist with heat.  I would recommend that you establish the surface to which you would like the flap to conform first, position the flap so you can apply pressure at the appropriate locations and also make sure you have a method of applying sufficient pressure over a large enough area so as to not simply depress a localized area.
 
I would highly recommend that you (uniformly) heat up the flap BEFORE applying pressure, and then apply the pressure in incremental steps.  Once it is in position, remove the heat and allow to cool.  Part should remain in that position, if you have had high enough temperature, without any 'springback'.  Use an IR heat gun thermometer if you can locate one for monitoring the temperature of the part.  Temperature between 250F and 275F should work, depending on the heat distortion temperature of the resin used.  You should get to that temperature, or slightly higher. 
 
Applying pressure first and then heating may result in an area that may be heating faster to provide all the 'yield' and possibly create a localized structural problem.
 
 
 
Gary R
 
 
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