Search:

Type: Posts; User: alcufe

Page 1 of 2 1 2

Search: Search took 0.01 seconds.

  1. Replies
    13
    Views
    1,366

    Doesn't pewter melt in an oven? I think my home...

    Doesn't pewter melt in an oven? I think my home oven goes up to 550C? What about sticking an open mold in and put in pieces of pewter around the mold and let it melt into it? :) Just a crazy idea hehe
  2. Replies
    17
    Views
    1,606

    It doesn't look more than 5-6in wide. I have been...

    It doesn't look more than 5-6in wide. I have been doing a lot of printed parts I have used Bondo to fill in areas to remove that striping when I'm too lazy to sand it out completely. But your coin is...
  3. Replies
    4
    Views
    623

    The 3d printing of the sand mold is probably an...

    The 3d printing of the sand mold is probably an ExOne printer. I've been to a foundry that had one of those. It does it by depositing sand and glue layer by layer until it builds a mold. So since you...
  4. Replies
    6
    Views
    520

    Ugh, my mistake. I had two tubs of playsand and I...

    Ugh, my mistake. I had two tubs of playsand and I forgot one of the sand was premixed with bentonite which I haven't used in ages. They both look so alike when dry!

    I just tested a small sample...
  5. Replies
    6
    Views
    520

    Why is my sodium silicate not binding?

    I mixed some sodium silicate today and unsuccessfully tried to make a core. For some reason the sand mixture wouldn't bind.

    Any reason why it wouldn't bind? Maybe too much sodium silicate? I had...
  6. Replies
    8
    Views
    1,290

    A Haas toolroom mill (TM-1?) is another viable...

    A Haas toolroom mill (TM-1?) is another viable option, except for the 3-phase power. It's not that much bigger than a bridgeport... maybe a little bigger... but much smaller than any vertical or...
  7. Replies
    4,842
    Views
    940,932

    Sticky: I'm actually in a middle of printing a core box...

    I'm actually in a middle of printing a core box and split pattern (to be mounted on a match plate) for a cast iron foundry as a test actually. The core box took 50 hours to print each side because it...
  8. Replies
    17
    Views
    1,449

    May be a possibility, they look like sand...

    May be a possibility, they look like sand inclusion when the loose sand moves into the cavity. Did you try different gating system with a longer runner and wells to possibly trap it? Or maybe your...
  9. Thread: Sources of CO2

    by alcufe
    Replies
    10
    Views
    773

    I tried the coke/mentos thing and it works in a...

    I tried the coke/mentos thing and it works in a pinch when I didn't have any other CO2 sources readily available. I just watched the baking soda/vinegar method and it's equal in concept. But the...
  10. Replies
    23
    Views
    989

    Ahh I was nervous on my first burn too... started...

    Ahh I was nervous on my first burn too... started with one firewood open, and two with it closed for a total of about 3 hours. Followed the hobbymelter instructions on backyardmetalcasting.com. Then...
  11. Replies
    4,842
    Views
    940,932

    Sticky: Looks good! I see you gated it on the thinner...

    Looks good! I see you gated it on the thinner side and skipped the hole.
  12. Replies
    10
    Views
    770

    Thanks Jason! I'm quite happy how they turned...

    Thanks Jason! I'm quite happy how they turned out! The whole process actually! I learned quite a few things this past few weeks. I have to say the 3D printing part has given me quite a few options....
  13. Replies
    10
    Views
    770

    Ahh I think everyone's confused that I'm having...

    Ahh I think everyone's confused that I'm having issues casting the handles... that's not the issue... the issue was with the split pattern housing that I was casting... I just made those handles to...
  14. Replies
    10
    Views
    770

    Maybe it was the sand, but more the angle I was...

    Maybe it was the sand, but more the angle I was pulling it at. The draft angle is at 2.5 degrees, which is quite narrow for me and after 6 times it always parted with issues on the far side from me....
  15. Replies
    10
    Views
    770

    Thanks! The handles I casted worked beautifully....

    Thanks! The handles I casted worked beautifully. In my photo you can see the split pattern and the cope now pulls cleanly. I tried it twice, once to test it and the second time to cast it. Both times...
  16. Replies
    10
    Views
    770

    Casting my flask handles

    So I just started casting and last week I tried casting a split pattern for the first time and for some reason I just couldn't get a good separation. Every time I lifted the cope, a part of the sand...
  17. Replies
    11
    Views
    1,940

    Just fyi, I bought the cheaper of the two link,...

    Just fyi, I bought the cheaper of the two link, and so far it works well. I can melt aluminum as fast in about 15-20 minutes. I'm surprised at how little propane gas is used actually. I thought...
  18. Thread: Sand in NJ?

    by alcufe
    Replies
    16
    Views
    1,213

    Baking soda and vinegar? That's good to know! I...

    Baking soda and vinegar? That's good to know! I can't bake my cores though, the PLA material I use on the 3D printed core tend to deform even at low oven temperatures. I will probably get a paintball...
  19. Thread: Sand in NJ?

    by alcufe
    Replies
    16
    Views
    1,213

    So a quick reply, I did get the quikrete fine...

    So a quick reply, I did get the quikrete fine sand, which is probably around 40-60 mesh, then I bought a 50lbs bag of 200mesh silica sand from the Ceramic Supply Inc in Lodi.

    I started out with...
  20. Concur with machinemaker. That's my first thought...

    Concur with machinemaker. That's my first thought when I saw the part. Doesn't seem like the right solution is to cast it, unless you're trying to spare the cost of the material, or you don't have...
  21. Replies
    20
    Views
    5,204

    Very nice! Just curious, what 3D printer and...

    Very nice! Just curious, what 3D printer and slicer did you use? It seemed to have done a very good job printing it! I didn't even see any issues I usually see on my printer when printing with...
  22. Thread: Sand in NJ?

    by alcufe
    Replies
    16
    Views
    1,213

    Thanks all! I've been posting all my supplies in...

    Thanks all! I've been posting all my supplies in that construction material thread so hopefully that will help anyone in my area! I've just melted aluminum the first time last weekend and realized...
  23. Thread: Sand in NJ?

    by alcufe
    Replies
    16
    Views
    1,213

    Thanks Caster! Yup know that place, it's just a...

    Thanks Caster! Yup know that place, it's just a little out of my way. When I spoke with them their fine sand is only about 60 mesh. The other option is the 200 mesh. I had someone help me buy the...
  24. Thread: Sand in NJ?

    by alcufe
    Replies
    16
    Views
    1,213

    Hah.. I just bought some of that... called more...

    Hah.. I just bought some of that... called more than half a dozen places most didn't know anything but 'you want mason sand?'. This place had the Quikrete Fine Sand near me, and another place has...
  25. Thread: Sand in NJ?

    by alcufe
    Replies
    16
    Views
    1,213

    Thanks I'll give Lowes a try. I'm dropping by a...

    Thanks I'll give Lowes a try. I'm dropping by a quarry tomorrow on the way to work, but from talking to the guy he doesn't know much about the grading. Then I'll drop by Lowes on the way back. Home...
Results 1 to 25 of 30
Page 1 of 2 1 2