Back at it. Lost pla cast iron ceramic shell

Discussion in 'Home Foundry & Casting Projects' started by aonemarine, Mar 18, 2019.

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  1. Nov 7, 2019 #41

    mnay

    mnay

    mnay

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    Thanks for the infor
     
  2. Nov 7, 2019 #42

    Richard Carlstedt

    Richard Carlstedt

    Richard Carlstedt

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    Occupation:
    Retired Manufacturing Engineer
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    There is confusion in understanding investment materials - promoted and caused by books and articles and by postings !
    It caused me multiple failures years ago, and I commend aonemarine for pointing it out.
    Pay attention Folks !
    The misnomer is the word "Burnout"
    Please know this , Raising the Temperature to 700 C or 1300 F is to cure the investment !
    It has NOTHING to do with melt out,burnout, ash point or whatever your pattern is made of.
    I lost over 6 months on a project and learned that the books and youtube are wrong for using that term.
    Yes it is good to know at what temp your pattern material (wax,PLA ect) melts or sublimates or burns, but know the investment has other requirements for curing and to prevent cracking with heating - otherwise failure is in the cards !
    Rich
     
    Preston Engebretson likes this.
  3. Nov 7, 2019 #43

    mnay

    mnay

    mnay

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    Thanks Richard and Aonemarine.
    I bought a 3d printer just for the purpose of making patterns, plus it is fun to use it for other things. I love casting aluminum and have a good foundry set up, but I do not enjoy making patterns.
    I just purchased a small kiln to use for curing/burning etc. Your information is very helpful, because I have just begun to do research on investment materials and the process of lost PLA.
    Mike
     

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