Rejuvenate Petrobond Casting Sand - Mikes Inventions
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- Опубліковано 27 сер 2024
- mikesinvention... I show you how I rejuvenated my petrobond casting sand after it has become charred and useless. The secret is adding more oil, and I think I've stumbled upon a good choice. I used Oatey clear thread cutting oil. I mull it by hand and then pour some silvery awesomeness into it.
30W non detergent motor oil is the closest thing you'll find to real Petrobond brand oil. Smokeless synthetic 2 stroke oil is also ideal as it works just as well but smokes less. Keep in mind, most often your oil sand will need a shot of catalyst more than it needs oil. Too much oil isn't a good thing. If it feels dry add oil but if it lacks green strength try adding some cat first. If neither of those works, you've burned out enough organoclay with higher temp alloys and thick section castings to reduce performance, and only adding more binder or adding some fresh sand to your heap (or using new sand for facing) will get you back on track at that point. Propylene glycol is what is in P1 catalyst l, but if you xan't find that you can also use methyl hydrate (methanol) or high percentage isopropyl alcohol. Doesn't take much. You could always just pick out the burnt sand and set it aside, but then your good sand heap gets smaller and smaller. I highly suggest building a muller to recondition your sand, it'll do a lot better job than hand-mulling, and a lot faster... You'll wonder how you ever got by without one. Good luck!
Great video, thanks! When I first started casting, I used homemade green sand. Petrobond is so much better. But it's expensive! Thanks for showing how to rejuvenate it!
I used chainsaw bar and chain oil. seemed to work well.
Ive been subscribed a long time... amazing how many of your hobbies overlap mine! Great job man!
Thanks for sticking with me for so long. I just collect hobbies and do as many different things as I can. I checked out your stuff and was happy to see cardboard creations!
Thank You ! - Stay safe and best of luck with all your projects ! 👍👍👍👍👍
Good tip on rejuvenating petrobond. Thanks for sharing.😎⛏⛏🔥🔥
Thanks for the tip...gonna give it a shot with my worn out petrobond.
FYI - I tried adding that oil and found that adding some isopropyl alcohol as well helped immensely.
thank you
Thanks for sharing.
I just viewed a more recent YT video where 2:1:1 non detergent motor oil : alcohol : water mixture was recommended at about 0.5% ratio to petrobond to rejuvinate it.
It would be interesting to know why you stated motor oil is out of the question?
HI MIKE
IM JOHN
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AND WARM WEATHER
AND SMALL BUGS
I GOTTA GO POOP NOW
Most commercial foundries use 30wt Non Deter. Motor Oil and about an ounce per hundred pounds of sand P1 catalyst. I suspect your reason motor oil didn't work is a real muller coats each grain of sand better than your hand mixing.
Hi! Mike T. How to make a laughing sand for lead casting?
What about using Diesel?
Why cant you use motor oil?
Oh I could have I suppose. I'm just hate the smell and mess of motor oil. It was just personal preference really. It would be cheaper though... I might just do it once I run out of thread cutting oil.
What did u use to make your petrol bond besides the oil?
@@ruvyfpv4398 I didn't make the Petrobond, I bought it. This video just shows how I re-oiled it once I used it. All it is is very fine grained sand of the same size. You could sift your own I suppose, but I didn't want to. I hate sifting. Perhaps I'll raid Alex's sandbox if I ever need more. ;-)
Okay awesome man thanks for taking the time and replying! I am starting to sand cast myself have a couple videos up if you want to check them out and give me some pointers that would be greatly appreciated 👍
can i use DARK thread cutting oil? will that make any difference?
Hey Justin! That should work just fine. Thanks for watching!
Hi. I have a new bag of petrabond and a flask i got to copy a ring. Its an Egyptian cartouche ring with a little detail on the face. The sand seems fine on smooth surfaces but i can't get it to imprint the face without clumping or crumbling. Its very disappointing. Is this stuff only meant for relatively flat things or simple things like wedding bands? Do you have any tips on how it might be improved?
Hey Steven. I wish I had some advice for you. I’ve never done jewelry, but this sand does not like superfine details as you discovered. Talc helps release it, but it still can’t do superfine stuff. Sorry I can’t help on this one. Hopefully someone else will see this and give you some tips.
You need investment casting for jewellery, sand is not good for things that small.
@@cuplesey Thanks. Yeah. It dawned on me. I got 2 part silicone rubber stuff and a bag of those turquoise wax pellets. The wax castings look very nice. I'm still learning how to clean them up cuz i blocked the ring fingerhole for easy demolding. I just hope i can do the plaster/ lost wax thing in a semi bootleg way. I want to make 2 rings. Not heavily invest. So far so good.