PLA burnout furnace + DIY controller build

Discussion in 'Furnaces and their construction' started by Negativ3, Sep 22, 2017.

  1. Negativ3

    Negativ3 Silver

    As Peedee said, longevity may be an issue, but I have:

    Plan b: Kanthal wire.
    Plan c: Circular propane burner in the bottom.

    Hopefully it can handle PLA burnout. Next test.
     
  2. Jason

    Jason Gold

    I've got a junk appliance scrap yard a few miles from the house. This guy is probably sitting on a thousand of these elements. Who cares if they only last a couple of cycles. If I remove them, I bet I can pay a buck a piece!
     
  3. Negativ3

    Negativ3 Silver

    This is a great idea, you just need to make fitting/removing the rings as easy as possible. I am looking to beef up the thermal protection of the ring connections I have with ceramic tubes, same type as use to protect thermocouples. And probably sheathing the wires with fiberglass sleeves as well.
     
  4. Al2O3

    Al2O3 Administrator Staff Member Banner Member

    MG or MGT wire might be a good choice for that connection. It's appliance wire insulated with mica and ceramic sleeve and can have service temps as high as 1000F. I used it on my electric furnace. It can usually be reasonably purchased by the foot on eBay. searching high temperature appliance wire will usually identify it.

    http://www.awcwire.com/productspec.aspx?id=mgt-1000

    Best,
    Kelly
     
  5. Peedee

    Peedee Silver

    When the fan stops running in my oven (It's a common fault with the model) the element lasts for 10-20 minutes and then pops. That said, you are this far in now so I guess see how you get on.
     
  6. Jason

    Jason Gold

    You must own samsung appliances like me. Remember when a dishwasher would last 15years? HA

    I don't think it would take much air movement across this style of elements to help them last longer. I wonder how the elements under todays style glass tops survive in there?
     
  7. Negativ3

    Negativ3 Silver

    Did my first burn test before departing yesterday. No pics but a plinth of refractory wit a PLA magnet holder sitting on top.

    At 750 (cutoff temp) only a small amount of black ash remained.
     

Share This Page