Metal Casting at Home Part 4 Backyard Foundry

[Joeaft]

what kiind of sand is. That?

[myfordboy]

@Joeaft This is called greensand. See metal casting at home part 26 and more details at myfordboy.blogspot.com

[636industriescorp]

i enjoyed the video great job!!

[themrpantalons]

de l merde

[20RoyalSuperKing]

Just wondering if you have tried using the talc to coat the external parts of the cast for a smooth finish too? I stumbled across your vids and your giving me new ideas for yet another hobby. I like the lack of talking. everything I ever learned was just by watching an expert. Thanks matey. I just thought, Talc if i remember correctly is a hydrated gypsum/lime maybe. If so releases it'swater when heated, just like plasterboard would. So maybe it causes some kind of steamy skin when your casting.

[myfordboy]

@20RoyalSuperKingt I am pleased with the finish from my sand, no need to coat the mould withanything .The talc used for parting does not come in contact with the metal so its not a problem.

[Workalldayandnight]

@myfordboy You see How You have it In 1:02 ... It Would Be one side... Do you think I can pass then for Cement??... A guy at a Jeweler Place told me the only thing would happened was the Bubble but I have a Sander and Cutter for that .. and a Buffer,,,, ..

[greggo93]

@myfordboy could be useful to coat those blu pieces as well to help their removing?

[myfordboy]

@greggo93 I coat the pattern with talc to aid release from the sand.

[20RoyalSuperKing]

Just wondering if you have tried using the talc to coat the external parts of the cast for a smooth finish too? I stumbled across your vids and your giving me new ideas for yet another hobby. I like the lack of talking. everything I ever learned was just by watching an expert. Thanks matey.

[algae1000]

Great video! It wasn't clear to me how you suspended the core within the center so that you ended up with uniform wall thickness. Did you carve the lettering on the outside of the pattern? Very helpful video. Thank you!

[myfordboy]

@algae1000 The letters were cut out of plasticard and stuck on. For a detailed explaination about the core centering please visit myfordboy.blogspot.com and look at the metal casting tips.

[TheElsyd]

Hi, you keep using talc powder and you are having good success with that - yet i read on other sites that it cannot be used as it is hygroscopic and absorbs moisture. As your talc works what variety do you use?

[myfordboy]

@TheElsyd I just use whatever Mrs myfordboy has in the bathroom cabinet. Johnsons baby powder or Simple talc. Works for me.

[Brasster971]

This is a great video, very informative, and the little bit of text said talc powder. I have a broken cast iron car bonnet deco that I want to remake in aluminium, but had very little idea as to how I should do it. I can see now that I need to be a friend of someone like you who lives nearby. LOL.

[wheelnutt]

Hi, what type of sand is that. Do you not need to line your crucible with refractory?I thought that steel will contaminate ally? Thanks for good instructional films.

[myfordboy]

@wheelnutt Sand is water bonded greensand. Crucible is stainless steel, not lined.

[warfreak813]

some teachers dont have to talk to get the job done

[DIECASTER]

Jesus H. Christ,... would it kill you to explain what it is you are doing AS you are doing it???

Like what kind of dirt is that, what relest powder you are using,... give a play by play as you go!!!

I'm pretty sure YouTube doesn't charge for words.... *_*

[dubtafoo]

@DIECASTER Chill out, be thankful he even made this video for us .. for free. It's actually quite informative .. I recommend you do a little side research and watch the other videos (this video is part 4).

[aby9005]

which metal did you choose

[myfordboy]

@aby9005 Aluminium

[aby9005]

@myfordboy you have done a great job ....i am getting so many blowholes and blisters any suggestions

[myfordboy]

@aby9005 Blowholes are gas trapped in the melt. Be sure to de-gas before pouring.

[carpetmonk]

i am a little lost.. how does the core (i am imagining its the same 'flaky' black clay, covered head to toe in thick talcum?) not stick to either half of the mold? does it naturally 'float' to the center? wouldnt parts be more thin in places than others.. i would imagine this making weak parts.... ITS DRIVING ME BONKERS!! help!!

[myfordboy]

@carpetmonk The core is made from sand and other ingredients and baked in a oven to make it solid. See my videos on core making. In this casting the reduced diameter at the ends of the mould leave "core prints" in the mould. The core is made longer than the pattern and the core rests in the core prints and is held in place when the top flask is fiited.

[carpetmonk]

@myfordboy thanks, i continured the series and came across the 'sharp sand' vid.. watching on this screen its hard to see. fascinating. the word here is precision i suppose. thanks, your videos are great, thatnks for letting us see your project. most videos, never show the good parts.

[handiest1]

I have really enjoyed watching this series, where do you get the blue "positive" parts to make the mold?  Are you making them, or are you casting the part for someone else?

[myfordboy]

@handiest1 The blue patterns I make from wood. All the work is for my own use.

[bndrcr82a08e349g]

A Question: Can i apply talc previously to entire model, to leave it safe?

[myfordboy]

@bndrcr82a08e349g Sorry your question has become lost in translation. I do not know what you are asking.

[bndrcr82a08e349g]

Sorry, I'm Italian and I do not speak English very well I wanted to know if it would be useful to coat the entire model of talc to facilitate the extraction froma moulding sand

[myfordboy]

@bndrcr82a08e349g Yes, I do coat the pattern with talc to aid release from the sand. 

[Hallaran]

Hello, I am toying with doing some casting. I have a need to make some obsolete small parts. Great stuff here! I have a question: How do you keep the core centered inside the mold? Is it done with spacers or tabs? Thanks much, Jack

[myfordboy]

@Hallaran In this casting the reduced diameter at the ends of the mould leave "core prints" in the mould. The core is made longer than the pattern and the core rests in the core prints and is held in place when the top flask is fiited. Other ways can be used depending on the pattern. Check out my video featuring the cantileved core.

[Hallaran]

@myfordboy Very interesting, an old Art/Science but brilliant too IMHO. What interests me is how the core will stay in place when you cast the block, (or cylinder) around it.I'll go watch the cantileved core video. Thanks

[guitarchickcrazy137]

if i was to cast a revolver

how would u recomend?

[Supermassively]

@guitarchickcrazy137 That's a pretty complex question...

He'd pretty much have to make a whole video series to explain it.

[mastekop]

the core is made from sand, wallpaper paste, linseed oil and flour. the flour is using baby powder, how about wallpaper paste, do we use anything but glue for it, what kind of glue can be used? also for linseed oil, can we use coconut oil or other oil ? caused of the both material is not too famiiar in my place bandung. thanks

[MrOnurC]

good job men thx :))

[fly2000jtb]

is baby powder good to use if you cant get the talcum cheap? the dallor stores around here have the baby powder much cheaper 1.00 hahhaha Joseph T fly2000jtb.

[myfordboy]

@fly2000jtb I am using Johnsons baby powder. Ingredients are talk and perfume. Smells nice when you use it!

[kawana87]

have you ever tried putting talcum on the top side of the part you're molding? To make removal easier?

[myfordboy]

@kawana87 I dust the patterns before moulding.

[BITTYBOY121]

Impressive!

[Thetruthishere11]

Any vid on making the cores and patterns?

Great videos myfordboy!

[myfordboy]

I show core making in Metal casting at Home Part 5 and 11.

Part 8 shows a bit of pattern making.

[death2148]

Sorry for asking a noob question but, what is the core for? I would think it would hinder the fluid or whatever you are melting.

[myfordboy]

A core is used when the middle of the casting needs to be hollow or has a cavity of some kind. In his video one is used to make the cylindrical objec into tube shape. Without the core it would be a solid cylinder. it is supported at the ends only and the metal flows around it.

[mbcNOOFS]

what is the core made of?

[myfordboy]

If you watch Metal casting at home part 5 all will be revealed.

[myfordboy]

Another method is shown in part 11.

[mbcNOOFS]

ahh... whoops, how stupid of me.

[levsmith]

how does the core get centered? does it sortof center itself once the metal is poured?

[myfordboy]

There are 2 location points added to the ends of the pattern known as core prints. These leave a void in the sand to support the core in the correct location.

[willfrost]

Can you dust the patterns with talk as well to make them come out of the sand easier?

[myfordboy]

Yes I actually do this.

[twofoot65]

How do you make your patterns? Are they handmade or rapid prototype parts?

[myfordboy]

The patterns are handmade from wood.

[Baraquiel62]

and what is this peace of?

[myfordboy]

Fuel tank and cover for model Baker Monitor Hit and miss engine.all castings are complete for this engine I am machining it now.

[Baraquiel62]

Thank you so much, I think you are really good in your job..

[blackgoldlover1]

best video

thanks

wish u all the best

[Upub2]

Hello

My apologies. I see you cover this in part 7. This is so much better than a book. Thanks a lot.

[Upub2]

I don't see anyone on Youtube discussing a solid pattern, which can't be cut in half. Do you pound it into the drag, or try and build a bottom board with matching indentations or what???

[2manyhobbies1975]

I like the common sense approach and materials: for example your formula for the core. Thank you for producing these video's, as someone else stated these are the best casting video's on the tube.

[barumman]

By far the best amateur foundry work on you tube.

[Kompleteorisyeni]

Thanks.

great videos

[SteinarNor]

Thanks for exelent videos! You have clearly long experience in metal casting.

I wonder on one thing, how do you manage to suport the core in the middle of the mould? I can't see anything suporting it?

[SteinarNor]

My bad. I thought the tank should have ends also. I posted my above question before I saw the end of the film.

I suppose it is necessary with some "holes" in the casted piece for the suporting bars for the core?

[myfordboy]

As my engine will run on butane gas the tank does not need to hold fuel so I have cast the ends seperatly to make it easier.

The pattern has "core prints" added to the requred shape and this leaves a shape in the sand to support the core.

[SteinarNor]

Ok. Does this "core prints" result in some holes in the casted piece?

[myfordboy]

The only hole is the one left by the core. Compare the shape of the pattern at the start of the video with the finished casting.

[SteinarNor]

I have studied the video closer. I see how you do it now. Many thanks :-)

[scaledtanker1452]

Nice work!! a video on making the core would be nice. Did you use sodium silicate?

[myfordboy]

Core is sand ,wallpaper paste, linseed oil and flour. I'll do a video next time I make one.

[rdloco]

nice video!!

[braindead4554]

A very nice and helpful video. You make it look easy.