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Old 11-20-2007, 09:31 PM   #1
20_rc51_00

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Default Building an oven >>>for post cure

I realize that post cure is required of many epoxy systems and is quite beneficial for ehancing the properties, but buying a real oven is out of the question.

What I have been thinking about is building an oven using the same principles as learned in grade 9 science class....or what ever grade that was. Where you made an enclosure that was lined with aluminum foil or something reflective and a clear top so that sunlight could come in and heat it all up.

I wonder if this could be used indoors with a similar setup but using a IR lamp to provide the heat and energy?

Would it allow for relatively uniform heating through out the box?

Any ideas?
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Old 11-20-2007, 10:47 PM   #2
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Cool

I started building a 4' x 6' and 3' foot tall post curing / sheet blow molding oven a while back and never finished it......

Here's a link to the basic plans......

http://www.wisil.recumbents.com/wisi...hpvbubbles.htm
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Old 11-21-2007, 10:24 AM   #3
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Quote:
Originally Posted by 20_rc51_00 View Post
I realize that post cure is required of many epoxy systems and is quite beneficial for ehancing the properties, but buying a real oven is out of the question.

What I have been thinking about is building an oven using the same principles as learned in grade 9 science class....or what ever grade that was. Where you made an enclosure that was lined with aluminum foil or something reflective and a clear top so that sunlight could come in and heat it all up.

I wonder if this could be used indoors with a similar setup but using a IR lamp to provide the heat and energy?

Would it allow for relatively uniform heating through out the box?

Any ideas?

ideas:
temp controlled heating elements. won't have to worry about what temp it is wavering around!

uniform heating have be done by high-temp blowers/fans in the enclosure, making the hot air the same all over the oven.

box sides. that blue foam sheeting that they use on new houses. Easy to work with! CHECK the high-temp rating though!

heatlamps will work too, again, find a way to monitor temps.

solar: large frenel lens heating a blackbody (black iron/rocks/etc) and have fans blowing past the blackbodys! maybe black anodized heatsinks even!
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Old 11-22-2007, 12:12 AM   #4
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Heating elements would be the best way to go as far as modulating the heat/temp, but I think that a heat lamp would be the easiest and least expensive, which is a big limitting factor in everything I do...

would it be better to have all sides enclosed by Al or steel or would my idea of having a clear top be ok? maybe 2 way mirror on top?
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Old 11-22-2007, 06:53 PM   #5
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I'm currently building an RC hydroplane using a Divinycell and carbon fiber sandwich construction. I'd also like to build a oven. I'm considering using preinsulated panels in the link below. Has anyone had any experience with this?

http://www.satinsulation.com/sat-ins...res-Advantages
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Old 11-22-2007, 07:27 PM   #6
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i use an electric heated home oven like for cooking, put the bottom rack all the way down and takeout the other rack, put it on 150 degrees, put the part in, crack the door a bit...1 hour and DING! the parts are done
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Old 11-22-2007, 09:53 PM   #7
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Just NEVER use that oven again for food!
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Old 11-22-2007, 10:06 PM   #8
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Quote:
Originally Posted by racedout View Post
i use an electric heated home oven like for cooking, put the bottom rack all the way down and takeout the other rack, put it on 150 degrees, put the part in, crack the door a bit...1 hour and DING! the parts are done
doesn't that stink up the house?
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Old 11-22-2007, 10:08 PM   #9
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Quote:
Originally Posted by Joe_Knesek View Post
I'm currently building an RC hydroplane using a Divinycell and carbon fiber sandwich construction. I'd also like to build a oven. I'm considering using preinsulated panels in the link below. Has anyone had any experience with this?

http://www.satinsulation.com/sat-ins...res-Advantages
I have no experience to speak of but it doesn't say that if can handle any temps that would be used for post cure in my opinion...
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Old 11-25-2007, 08:45 PM   #10
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I built an oven a few years ago. It had a recirculating fan arrangement to blow air over the heating elements then into the oven where the parts were.
The controls were way expensive, over $6K ! Way too much for the home builder.
If I had to build another one I'd use the guts from a domestic oven and build an insulated cabinet for them. For post curing the domestic oven controls should be fine.
This is the one I built;

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