Core Making Supplies

Discussion in 'link to various suppliers' started by John Homer, Jan 22, 2021.

  1. John Homer

    John Homer Silver

  2. Melterskelter

    Melterskelter Gold Banner Member

    John, good for you for putting up the link. As long as Pyrosil is not unduly expensive, good for them. But the "mixture of materials" they mention probably just means they added table sugar as outlined in Tom Cobett's excellent monograph. I am betting that plain RU is going be cheaper. And not everyone uses RU, but people have reported success with other forms of "waterglass."

  3. John Homer

    John Homer Silver

    Not really sure. Just put it on there. I am new to this core stuff. A lot of acronyms thrown around I am not familiar with I guess. They are pricy for sure.
  4. rocco

    rocco Silver

    John Homer likes this.
  5. John Homer

    John Homer Silver

  6. rocco

    rocco Silver

    That's new! The link may not work anymore but below the link, in that same thread, I also attached a local copy of Cobett's article and that is still available.
    John Homer likes this.
  7. Tobho Mott

    Tobho Mott Administrator Staff Member Banner Member

    They sell a couple of sodium silicate binder systems at Smelko Foundry Products Ltd. here in Ontario; one that uses a catalyst and one that uses CO2:

    I have about a quarter of a 55 gallon drum of the catalyst system (Sil-bond) binder and a can of type 15 catalyst. It sat around for a few years at Bill Jurgenson's foundry before I got it, I think. He had used some to make some bound sand molds that turned out well, and the binder is still liquid inside the 55g, so I assume it's still good stuff.

    Here's a pic of the can of catalyst and some info on mixing and work/strip times for the different types of catalyst that are available.





    I haven't used any yet but I have no CO2 on tap and don't really want to put my plaster coreboxes in the oven, so the catalyst seems like an ideal alternative for the next time I need a core.

    John Homer likes this.
  8. John Homer

    John Homer Silver

    Great information. Thanks for taking the time to post.

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