REFLECTOR: Forming molds

[Alex Balic]

No, not really- it does take just a bit longer to get to temp for some
reason though- and it has a lot more memory, so you need to keep the vacuum
on until it is cooled down but the parts are very crack resistant, which is
important when they are small and you are drilling holes in them near the
edges....

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Richard Riley
Sent: Saturday, April 22, 2006 1:11 AM
To: Velocity Aircraft Owners and Builders list
Subject: RE: REFLECTOR: Forming molds

At 01:15 PM 4/20/2006, you wrote:
>I have a really good kitchen oven with digital temp control- heated it to
>the recommended molding temp - can't remember off hand- used polycarbonate
>sheet- 3/32- got it at Lowes-  shielded the plastic from direct IR with
some
>cement board to prevent over cooking it- let it heat for about 20 minutes
>-molded really well

Acrylic is WAY easier to form than polycarbonate.  As I understand 
it, you have to bake polycarbonate for a pretty long time at a lower 
temperature to drive off the moisture, then raise the temp toget it soft.

And acrylic doesn't scratch as easily as polycarbonate.  

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