Acrylic Heating Oven

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Old 03-01-13, 07:00 PM
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Acrylic Heating Oven

I am using the metal heating elements (4 of them) from a toaster oven to build a larger oven for heating acrylic strips to press form them. My question is can I eliminate the current controls from the toaster oven and re-wire simpler? For the record, I have connected the four individual segments into (2) larger elements. I am not concerned with having the timer or the thermostat from old oven if that matters. Although I am comfortable with minor electrical, the simpler the explanation (maybe a pic or diagram) the better. Thanks in advance. I will attempt to upload some pics of project in its current state. John
 
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Old 03-01-13, 07:09 PM
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I have connected the four individual segments into (2) larger elements.
Connected series or parallel?

can I eliminate the current controls from the toaster oven and re-wire simpler?
Does "current" mean the controls it now has or controls for amperage or thermal fuses to prevent overheating.
 

Last edited by ray2047; 03-02-13 at 12:21 PM. Reason: Revised thoughts on safety after others commented.
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Old 03-01-13, 08:24 PM
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Using the element from a toaster is a little dangerous due to the exposed voltage.

Another issue is that the nichrome wire must be well supported.

You don't have to use any of the controls from the toaster oven.

An oven element would probably be a safer and more effective way to go.
Only drawback is most are 240 volt.
 
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Old 03-02-13, 11:32 AM
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Hopefully, the "metal heating elements" are not exposed nichrome but are "calrod" type sealed elements.
 
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Old 03-02-13, 12:05 PM
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I have built something similar to what you are considering using the heating element from an electric space heater. When I tried just running the heating element directly (I had shortened the element) it burned out after about a minute. I ended up using a variable AC transformer connected directly to the heating element. It also allows me to control the heat output without using a thermostat. It's been 5 or 6 years and it still works reliably and is very controllable.

 
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Old 03-02-13, 09:17 PM
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current- meaning the existing 3 controls 1- timer, 2- temp. 3- function (broil, toast, bake)
as far as series or parallel - i believe it'd be series- I butt connected and soldered two pieces together creating a single element essentially making two elements out of four

curious why you revised your post? Thanks for your time and response
 
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Old 03-02-13, 09:20 PM
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Thanks for the info, will begin research monday to hopefully wrap up. i will be posting updates as well as pics with next response. thanks again
 
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Old 03-02-13, 09:29 PM
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curious why you revised your post?
I felt I had been too quick to judge the safety of your project after reading other members' comments.
 
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