Building my first vacuum casting table
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- เผยแพร่เมื่อ 30 มิ.ย. 2020
- With only a vague concept of how to do this I am attempting to make a vacuum casting or vac casting table for o improve the quality of the casts. In the end it kind of works. The future will probably bring improvements.
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Pretty cool all the things you work on!
Also as dude below said, you need to pour in one swift motion, you're better off spilling over edges than having to stop pouring then start again, also that tilt at the start was way too slow. Think of pouring metal like trying to flip a cake tin to get a cake out or how they flip buckets to make sand castles but not as fast or dramatic. More of a smooth motion with no slam at the end but that's the best way I can explain. Hope this info helps but great video!
Just a suggestion but I'd just drill a hole in the side and use a tap to make threads and skip the welding. You can also use a router and cut a circle on the plate and seal with RTV. I'm sure most of us would do things different on the second go around on most projects though. Good work!
Awesome
You need a crucible hold down when you pour. Nothing tight, just something to prevent it from falling out of your pouring shank.
Dude, you're doing great! I own a commercial vacuum table and I'll tell you my hole I set the flask over is MUCH smaller than what you have here. It's only about 3/8". I completely understand it takes 3 hands when doing this. That second furnace isn't really doing you any favors. An electric kiln that you can set a temperature and leave it while you get your metal ready would make your life much easier. When we pour metal in the flask, you can see it get sucked in really fast. Don't dink around pouring. GET it done! Note what kind of vacuum you are able to pull on the flask before pouring and get back with me. You want maximum suck! The only other issue I see is your "tank" is HUGE and by the time you set the flask on it and pull a good hard vacuum on it, you've lost loads of temperature unless you have a really good pump. Something to think about. You might want to shorten that tank... BIG TIME. I would have used 1/4 of the length of that pipe. Keeping the nipple in the middle is a good idea. You WILL lose a flask at some point and will suck metal into your setup. Having it get sucked into the pump will ruin your day. Commercial tables are designed not to have this issue. If you want detailed photos of a proper $$$ table, I can get them for you. Just gotta give me an email address and I'll get them to you. ;-)
Yeah I am already wanting to re design it to make it better. I love to see what kind of set up you have. My email is Lund1060@gmail.com.
Please send me some pics also I am struggling to make a successful setup. Recoveryman325@gmail.com
What do you have to say about the kaya casting machine?
@@sahilsquadron2286 I think that question was directed at me.. Its a real nice machine. For a home hobbyist, it's over kill unless you are really serious about jewelry casting. For a small professional shop, it would be a good investment. It all comes down to the size of your castings.
@@jagboy69 yes it was and thank you :), would you suggest building my own, basically have a machineshop at my disposal and know my way around pretty well. I'm just a hobbyist atm from home but plan on making this a living in the future. Already have a pneumatic graver, a facetron, a shitty rolling mill and basically every other tool of the trade, basically the one thing I'm really struggling with is castings.
Lennox or Milwaukee holes saws. I use them for stainless hoods. Regular steel in no problem unless you get some of the hot shaving on you that they throw.
Chinese. I don’t even know the brand.
What is the power of vaccum pump you used?
I want to learn this type of thing after I get my new studio/manshed built
I am going to build a simpler version. I’ll post a video of it when I do.
No idea on the vacuum castings but it's a good first attempt. 👍
What cfm is your vacuum? Will a 4 cfm work good?
I'd be interested to see how it would affect the casting quality if you added pressure to you chamber after the metal flowed in. I use vacuum and pressure in casting resin so that I can reduce bubbles in complex pieces like pinecone castings.
Hmm. You cast pinecones? I tried doing that but didn’t have the best success. Unfortunately I wasn’t able to use the vacuum table here because I put a flask on it that was too hot and melted the gasket.
@@lundgrenbronzestudios - Pinecones look awesome when cast in multi colored resin but you absolutely have to use pressure and even better if you can vacuum then pressurize.
With the metal it goes to a solid state in a mater of seconds so a quick draw with a vacuum is really all you have time for.
Can I know the benefits of vacuum in the casting process because I notice that there is only one hole, so what is the benefit of vacuum
I did not read the other comments so I'm not sure if someone brought it up, but did you bake the wax out of your mold or did you just melt the wax with the molten copper?
No, I melted the wax out first and then heated it hot enough to burn out any residue. It’s important that no wax remains in the mold if you want it to turn out.
What about chamber height ,meter gauge and pump capacity
2:37... I just heard uproarious laughter from the other room... I think tonight is going to be fun.
Not sure I understand but as long as you are having fun.
How is your pump holding with those temperatures (500 deg celcius)?
The first thing that went on it was the gasket. I need a higher temp gasket. Graphite or something. I don’t think the air the gets to the pump is nearly that hot. It worked the first few times I used it but then the gasket melted and I haven’t fixed it yet.
@@lundgrenbronzestudios Thanks for the reply :-) it seems that the high temp gaskets last for about 3 to 5 times @ 500 deg C
You're supposed to glue the sprue to the base before you put the flask over, either that or drip melted wax and then place the sprue on the melted wax pile and wait for it to set
Ah that’s good advice. I’m still learning. And I learn from people like you. Thank you!
Borax works great as a flux
I’ve heard this. I should use it more often.
Thank you
until I see this, I had no Idea why my casts are not perfect
Don’t quench whole red hot. It warps
Can we cast silver jewellerys on it
You sure could.
pouring technique, you paused multiple times while pouring. You want to have a consistent single pour for the best results.
What "investment" did you use? Some investment plasters are not designed for vacuum assisted casting.
Yeah I will work on my steady hands.
The investment I used was “ultra vest jewelers investment”. From Ransom and Randolph.
Ultravest is the right stuff for vacuum casting. ;-) It's the idiots on yt trying to suck on stupid plaster of paris. :-/ Don't tell them our secret. It's fun to watch them F up.
@@lundgrenbronzestudios That Ultra Vest investment is good stuff. As world traveler said it's the right stuff for what you're doing.
Improving your pouring technique and following the other suggestions Worldtraveler made will go a long way to improving your end result. Good luck, keep casting and remember to ask questions and try things.
@@askquestionstrythings I sent Lucas here detailed photos of my casting table. It's dead nuts easy and he should be able to duplicate it. He will get way more suck on the flask this way.😉
@@jagboy69 Can the rest of us get a glimpse of said table? Please?? :-)
Safety glasses brother. Never use a punch without eye protection.
You added your pennies waaaay too late, supposed to add them before melting temp then let them mix in then get it to temp and when it vaporizes it will pull impurities out, what you did just instantly vaporised the zinc before it even hit the metal hahha, also don't breath those fumes in@@! They cause metal fume fever which can kill you.
Haha! I knew something was wrong. Yeah I wear a respirator every time I melt brass.
Hi
Hi
I wouldnt recomend showing yourself on camera breaking the law by desecrating currency just a fyi
It’s actually not illegal to do this. A lot of people think it is though.
Defacing currency is only a prosecutable offense if it is done with the intention to defraud.
@@BrassJunkie not true
@@lundgrenbronzestudios Yes it is. Obviously no one is going to arrest you for a couple pennies that would be ridiculous but it doesn’t make it legal. You are still destroying currency. Pennies are expensive to make they cost more than their value to make. Destroying them cost the government and economy.
@@jacobleeson4763 18 U.S.C. § 331 Whoever fraudulently alters, defaces, mutilates, impairs, diminishes, falsifies, scales, or lightens any of the coins coined at the mints of the United States, or any foreign coins which are by law made current or are in actual use or circulation as money within the United States; or
Whoever fraudulently possesses, passes, utters, publishes, or sells, or attempts to pass, utter, publish, or sell, or brings into the United States, any such coin, knowing the same to be altered, defaced, mutilated, impaired, diminished, falsified, scaled, or lightened--
Shall be fined under this title or imprisoned not more than five years, or both.