Lost Foam Casting: Foam Preparation - by VOGMAN
ฝัง
- เผยแพร่เมื่อ 8 พ.ค. 2018
- What type of foam should be used in lost foam casting? How can it be cut and shaped? How can it be smoothed? How can it be improved to make successful casting more likely? These and other questions are answered in this short video as I prepare a wheel pattern to form a perfect foam copy, ready for eventual transformation into an aluminium casting using my home metal foundry.
www.vegoilguy.co.uk/lost_foam_...
#LostFoamCasting - แนวปฏิบัติและการใช้ชีวิต
Class best instruction on lost foam casting I've seen I usually make wood patterns but for odd castings I use lost foam love the candle finish [& the burner thanks.
Dude! awesome videos, you've clearly answered in 2 10 minute videos all the questions that i've been googling for weeks
That's a great thing to read Jeff. Thanks : )
Great video fella. Great instruction. Can't wait to see the next step as I really want a go at this sort of thing.
Thanks Softail. I've already filmed a couple of casting videos to share but I'm waiting to shake off a cold so I can narrate them. Hopefully this time next week I won't be so croaky : )
Thanks a lot. I think this will help me very much.
la recherche de la perfection technique !!! Bravo c' est parfait
Merci : )
What brand of kind of glue did you say you were using? I heard not fast acting, and it looked a bit like super glue to me, but I wasnt certain on that part
Great theory
Impressive good sir, impressive.
Impressive is much too kind : )
Foam, particularly extruded foam, is easy to tool and shape. That's why I love it.
Importantly any detail I add to the foam gets left behind in the metal after casting. I'm just thinking of your last video there Perry, all that lettering. There's no way I'd tackle so much small lettering with foam - I'm go mad with frustration first (gibber gibber). Tackling a problem like that, phew, dunno... maybe a silicone lettering mold, wax the lettering, back it with foam, then burn the lot away with hot metal. That's theoretical of course as it's not something I've tried, but maybe one day.
Thanks for your kind comments and look out for my next video ; )
Perfect !!!!! Great thanks a lot merci :) :) :) :) :)
Thank you too!
thanks
I did this many, many years ago. we painted the wax blank in something the teacher called "debubbleizer" what it actually was, I have no idea.
we also painted multiple, thin layers of very fine plaster onto the blanks with a brush before setting the whole thing in embesment.
I have seen Foam CNC milling, Can you print some kind of foam, instead of burnout resin on your regular printer? Or pouring a silicone mould and filling it with some king of foam?
Greetings from the US! This video is great and I have learned a lot from it, but it did spark some other questions. I’ve recently started experimenting with casing molten metals, and while I knew there would be some unpleasant smells, I didn’t realize that it would be as intense of a smell. In your experience, are there different types of foam that may lessen this intensity? I do my foundry work outside and use all the necessary respiratory equipment, but I fear my neighbors may not appreciate the stench. Thanks in advance!
Btw found your channel through BigStackD. You guys are awesome 👌🏼
Hi Tyler. It's great to have you here and I hope you're looking forward to the challenge on Friday : )
When it comes to smells, I'm wondering which you're referring to.
Aluminium has quite a strong smell in it's molten state. Charcoal can whiff a bit if you're using that to fuel your foundry.
But I'm guessing you're talking about the foam as that's what you mentioned.
I believe the smoke is toxic, so you're wise to take precautions, though I've always found this very short lived. The smell of the metal hangs around for ages, but the foam snuffs out in seconds.
I'm not aware of any other types, but you've watched probably the most helpful video I have on the subject.
If you reduce the amount of foam you use, by hollowing out sections wherever possible, and if you raise the temperature of your foundry a little, you'll get a much faster and more efficient burn. This will improve your castings and accelerate the melting rate of the foam - getting rid of it quicker.
Failing that, set up on electric fan - and deny all knowledge to the neighbours : )
Personally I've always considered the noise of the average foundry to be more of an annoyance than the smell. That's one of the reasons I went electric... plus it meant I didn't annoy my own neighbours : D
VegOilGuy thanks for the advice!
Anytime : )
Good work,i was wondering if you could improve casting by using rotary hammer to pack the sand tighter.
It shouldnt be hard to mod a chisle for it by cutting it and welding a flat plate of desired size.
It's an interesting one. It is possible to bind the sand too tight and actually get a blow out where the gasses just can't get through the sand and everything has to give. Dangerous stuff. BUT with that said our mate Martin the Olfoundryman has a pneumatic sand rammer - seen in his last video I think. However he was then wise enough to poke fine holes in the sand to release gasses.
If you watch VERY CLOSELY right at the start of this (my) video, you can see a casting video I've filmed ready to share in a few days. Look between the feeder and vent at a small hole I poked in the sand with a bicycle spoke. You can actually see smoke coming out, proving that Martin is right. So compressing the sand to get a tighter fit and more detail needs to be carefully balanced with venting. That's what makes it all so much fun : )
Nothing says fun,more than getting 900 Celsius hot metal into your face !
Maybe instead use one of those vibrating sanders that use sandpaper strips.Or make your own compact version with a stick for handle and a wood plate with vibrating motors attached to it for compact size.
I did got a fountain of molten lead flying 2m high because of wet plaster mold for fishing weights.Much fun,i was lucky that time .
Very lucky...
We make light of it but we know the dangers involved, that's the important point.
You'll see in my next two videos...
1) Green sand - which I don't compact very much but do also poke extra ventilation holes, and
2) Dry sand with thinly plastered foam - lots of vibrating to get the sand well settled in.
Thanks
No problem
Ganna try a lost foam casting of. The dd557. About 10" long and copper
Hi Laymon. As in the ship? That's a fabulous idea.
However, if you're new to casting, I'd suggest starting with a few simpler shapes and get the hang of it first. Also try Aluminium to begin with... copper can be tricky.
Been casting alil lol. Just love ships and last night got the wax on the foam. Ganna try and cast today just gata build new casting box.
Can you use Elmer's Glue I got plenty of that
I don't know Emilio. The best thing to do is glue a couple of scrap pieces together. Once dried, try and cut with a hot-wire cutter ideally. I found some glues wouldn't cut - so they go on my reject list. Those that cut burn easily and that's what we're after.
@VOG Noob here. I have a question: large aluminum sheets are pretty expensive, and I was wondering if it would be a bad idea to create sheets this way?
Casting large thin areas is very difficult
From one brit to another where do you source your modelling foam from?
I just Googled extruded foam and ordered a small bundle. It's been a while so I can't remember who I used, but there were a few companies I think.
I would appreciate your comments.
Have you ever seen the film "The Lavender Hill Mob"
I've heard the title but never seen it. Dare I ask why : )
@@vogman it's has casting in it 😄 they turn stolen gold into models of the Eiffel Tower.
It's a good plan... so where do we get the gold ; )
@@vogman OK, do you have access to 3 MINI Coopers? ;)
Just don't blow the bloody doors off (in my best Michael Caine voice)
: )
Thank you again for your help. Well, excuse me because this is my first time using metal casting. I am using polystyrene because it is easier to get here.I am going to show you the picture of the thermostat cover i made. drive.google.com/open?id=1_9ill1goOwwgP0S2PuuttchIdGPmUwn_
It's hard to see from the images in honesty and the truth of the matter is sprue placement is an art. If you've wtched the follow on videos to this one, you'll see I like to use plaster feeders and vents. These take a little time to make but, in my opinion, keep the metal hotter for longer and get the gases out of the way. I try to place the feed in a fairly centralised spot to reduce the metal travel time / distance.
SpiderVeg? 😉 👍 Maybe we can send you some foam. What's the address you can accept it? I suppose you could swipe some from a recycling center, but ask first. I wouldn't want you to become legally entangled.
I once made the mistake of mentioning to family and friends that I made use of throwaway polystyrene foam. Huge error! Within days they'd all offloaded their rubbish on me - all shapes and sizes of useless packaging strips that I couldn't do a thing with.
But I suppose their hearts were in the right place : )