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Author Topic: First casting  (Read 761 times)

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MurphyStone

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First casting
« on: March 19, 2018, 09:03:28 AM »

My first wax carving as well as casting, done on an old swest machine from 1974. 




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MurphyStone

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Re: First casting
« Reply #1 on: March 19, 2018, 09:08:49 AM »

Here is a video of the basic process. 

https://youtu.be/olrkOeHumRw

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gemfeller

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Re: First casting
« Reply #2 on: March 19, 2018, 10:14:27 AM »

That's super-nice, especially for a first attempt.  Inlays are difficult when it comes to getting everything proportioned just right.  At least that's my experience.  It doesn't take long to learn that the "art" is in the wax work.  Good job.
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MurphyStone

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Re: First casting
« Reply #3 on: March 19, 2018, 10:27:50 AM »

That's super-nice, especially for a first attempt.  Inlays are difficult when it comes to getting everything proportioned just right.  At least that's my experience.  It doesn't take long to learn that the "art" is in the wax work.  Good job.

Thanks can you tell me do you always need to use new casting grain or can you remelt your sprues and and or scrap
?  Curious for gold and silver.  And yep the wax shows everything :)


another shot of the this ring. 



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rocks2dust

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Re: First casting
« Reply #4 on: March 19, 2018, 11:23:33 AM »

I agree: very successful, even if it were not your first piece. Nothing wrong with re-using your scrap. Just cut up clean pieces and keep it sorted by fineness (e.g., don't mix .925 with .999, etc.). For contaminated pieces that you cannot clean (stubborn bits of investment, solder, etc.), it is probably easier to just put those aside to sell to a refiner.  Should work fine if you consistently use the same alloy, though some folks prefer to mix the scrap 50/50 with new grain - especially with mixed alloy scrap.
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r2d

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gemfeller

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Re: First casting
« Reply #5 on: March 19, 2018, 11:28:42 AM »

The rule I always follow is 50% new metal when using old sprues and buttons.  Make sure the old metal is squeaky clean with no oxidation or other contaminants.  At times I've re-used old buttons without new metal with varying luck.  I had enough problems that I always follow the 50% rule now.
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Phishisgroovin

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Re: First casting
« Reply #6 on: March 19, 2018, 07:58:30 PM »

I have to try this soon now that i have some nice torches.
Neighbor left an acetylene and a huge propane turbo torch in his yard when he moved and never came back for them, then my friend purchased the place and gave them to me.
Free torches are the best torches lol!

I need a kiln though right?
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hummingbirdstones

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Re: First casting
« Reply #7 on: March 19, 2018, 08:30:27 PM »

Great job on your first casting!  Awesome that you have all the equipment to do it.  The ring looks really nice.
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Robin

rocks2dust

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Re: First casting
« Reply #8 on: March 20, 2018, 10:32:56 AM »

I need a kiln though right?
Can you convince your friend to move again - this time to a house where someone has left a kiln?
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r2d

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Sapphireminer

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Re: First casting
« Reply #9 on: March 20, 2018, 01:09:06 PM »

Hi MurphyStone very nice ring you have made agreat piece its a shame that most people don't appreciate a great hand made piece they would sooner buy a mass produced machine made item from a jewelry store at double the price. The wife and I just tried our first cast using petrobond but need a bit more practice to turn out a good piece .
Dave
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MurphyStone

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Re: First casting
« Reply #10 on: March 21, 2018, 11:03:05 AM »

Thanks for the compliments everyone,  it was super fun.  I hope to get some more carved up soon and try a larger sprue especially with the burnout time needed. 

It there a specific reason why you shouldn't ever mix fine with sterling?  other than effecting the purity are there other issues? 

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gemfeller

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Re: First casting
« Reply #11 on: March 21, 2018, 11:22:09 AM »

None that I can think of.  As you say, the purity will be affected if that's not a problem for you.  Even re-using old Sterling results in some purity loss due to burn-off of some materials used in alloying.  If you're stamping your work for a given purity just be sure it meets or exceeds the stamped purity. 
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