Metal Casting at Home Part 18 Cantilevered Core

[@remowilliams623]

Man i love watching your videos, i can watch them all night, i just wish i had 10% of your talent. I would love to know what your are making and watch you. You sir are a true craftsman.

[@antifactionprogman]

With my limited knowledge of this task I can really tell you know that you are doing. very impressive. Please keep the video's coming!

[@Redsmithstudios]

I should just be patient and watch All your videos before I start, because you answer all my questions in future videos. Thanks for all your work

[@MaturePatriot]

You are definitely a MASTER of your craft! A joy to watch!

[@gordonjackson513]

I work in a foundry have done for nearly 42 years and moulded with greensand for 41 of them I was always taught to cut the ingates into the mould on the top part which I think you call the cope I've always called it the topper but I love watching you work and your videos.

[@myfordboy]

That's interesting. I do that sometimes if I want the gate to come in a part of the casting that will be machined. Some tosser Troll was very rude critising my methods in this video kzbin.info/www/bejne/rqSll3xui92gZ6s I was going to remove the comments but left them so people could see what an arsehole he was.

[@SweTrekki]

love the "trusty old stick" :) the flasks come and go but the stick remains the same great video as usual, love to hear you narrate one in the future.

[@makisaito5576]

You make it look so easy lol, thanks for the inspiring videos and keep uploading them please. Im going to give this a shot, i just need a few items now:)

[@BITTYBOY121]

Yet another master piece! - Congrats, That was a great video David and very well done :-)....the beauty of metal casting is you can design and cast almost any componet you want - now that's a good feeling ;-)

[@myfordboy]

@gblpst81 Yes it a crankcase. This one is not my design I have purchashed drawings. I do use CAD to redraw the parts to make the patterns.

[@myfordboy]

@jarodeells Correct, but its easier to align the flasks if there is more clearance between the core and the mould. Core is a sodium silicate and CO2 one.

[@myfordboy]

@AllenTrucks It takes about 15min to melt. My home made burner uses propane fuel.

[@myfordboy]

@nemocheerio The metal can be too hot, it should not be glowing red. I pour as soon as its liquid after the flux and degass are added.You can tell if all the metal has melted when you cannot feel any lumps when you give it a stir. I dont measure the temp with anything.

[@jairor.rocha.6291]

I spend my time watching your videos, very very good

[@myfordboy]

@payoflaco Its an blind hole but the shape of the rest of the casting meant the pattern could not be withdrawn without using a core.

[@myfordboy]

@PuGZoR The pattern is made up in two pieces. They can be stuck together with newspaper between for final shaping, then split apart.

[@myfordboy]

I have not tried to cast around a tube.It could act as a heat sink and give problems with shrinkage but worth a try. You could heat up the tube before casting, that would help.

[@myfordboy]

I did a video ( part 25 in this series) showing the metal to avoid. The alloy used in extrusions for example will have different properties to that used for cast items. Best stick to scrap that has been cast then you know it's suitable. I have been getting great results with alloy car wheels.

[@liquidsleepgames3661]

myfordboy could i use soda cans to cast pots and pans or is not suitable

[@myfordboy]

@luvbigexplosions I am removing the dross, impurities like paint that was on the metal. Best to remove it to stop it getting in the casting.

[@myfordboy]

@ganaschico Its part of the model Olds engine I am making.

[@myfordboy]

@securadeguitarhero Its Just salt and sodium carbonate ( not bicarbonate ) Sodium carbonate is sold as washing soda and I now prefer to use LoSalt.

[@PuGZoR]

Your videos are absolutely enthralling. Very interesting. Can I ask though, when you make patterns with two complex halves such as this one, do you make one pattern and cut it in half (might be difficult given you'd need to make up the cut width somehow, possibly by recessing the pattern slightly?), or do you make the two halves separately?

[@nemocheerio]

Thanks for these videos. You have inspired me to build my own furnace. How do you know when the metal is hot enough to pour? Is it possible to get it too hot? Do you use a thermometer?

[@myfordboy]

@reymer101 I have switched to LoSalt now but table salt works fine.

[@Redsmithstudios]

Thanks for the Awesome Videos. What scrap do you look for, or avoid? I heard one guy say not to use extruded aluminum, but he did not say why. I have been collecting cast aluminum but have other as well.

[@jimintaos]

Thanks-I was wondering about just that and at some ungodly hour this morning after having watched the last of your great video classroom, I decided to use a core. I would like to try the sodium silicate, but for the first of these I am going to use a kiln dried refractory mix of silica flour and hydrocal and see what happens. Again-thanks for your videos. How did you learn? On your own, or did someone with experience like you teach you?

[@larz0001]

you must have a very patient wife,, i love your work

[@payoflaco]

i love your videos....but i have to ask,why you use a core to make this sape?cant you make the sape in the previous model? is not a interior core, is a open hole,rigth?

[@jimintaos]

I am up to # 18 and feel like I am in the best classroom ever. I have a project I am just about ready to try and cast and I am wondering if you have ever had any experience with casting aluminum around a copper pipe or brass tubing?

[@luvbigexplosions]

what is that stuff you are taking of the top of the molten alloy and if you dont remove it what are the effects?

[@myfordboy]

@Arnthorg Crankcase for model engine.

[@jarodeells]

Nice casting. I suspect that if your core stuck out farther you wouldn't have the flashing to drill out. But you probably aren't planning to make 10000 of these. What materials are in your core? Was it baked to harden?

[@jamesturner1348]

loved this video. Well done!

[@steamwally]

Great video, I really enjoyed that.

[@EmperorAst]

You should consider making a moulding bench.

[@myfordboy]

A lampost would be hollow and have openings top and bottom, for the wiring, or gas supply if it were old.

[@reymer101]

is that just regular salt? the one that is used in cooking?

[@dancingintherainish]

Do you know how a lamp post is made? If the core was inside, and there couldn't be any openings, how would you remove the core?

[@myfordboy]

Flux makes the metal cleaner and more fluid.

[@emilkarlsson9387]

Thanks for all the really great videos you post! Very instructive! How come you dont take time to build a proper workbench? You allway seem to work on the concreye floor.. Cheers

[@myfordboy]

No room.

[@myfordboy]

The baked cores work well if you don 't have SSilicate. I have taught myself this, just read a few books. No youtube to watch when I was learning!

[@huntersills]

were do you purchase the molding sand

[@myfordboy]

Yes I did.

[@elijahxxx100]

do you make the wooden patterns?

[@BackstrokeOfTheWest]

It's the starship enterprise!

[@williamhayden7711]

Yeah! I wished all your video's included the melting, smelting or whatever of the metal and the pour, cool and reveal!

[@MaturePatriot]

You melt metal, you smelt ore.

[@jeremyhunter2319]

What is the inner part made of, that it can withstand molten metal?

[@myfordboy]

+Jeremy Hunter It's made of sand like this kzbin.info/www/bejne/Z4CUfmShlr-ffMk or this kzbin.info/www/bejne/Z3nYqXeMpd6Sn7c

[@WeekendattheCabin1]

What kind of sand do u use?

[@MrExtermin8ter]

What's a flux?

[@shalffon]

A doubt! In fact the substances you put into the molten aluminum was: * Salt * Sodium Bicarbonate And what else?

[@wjackstl]

you removed dross, then added salt wrapped in foil to act as a flux. I'm curious why you did not add salt wrapped in foil before skimming off the dross? is that not the point of flux, to reduce the amount of dross?

[@myfordboy]

Before anything is added there is already dross on the top from paint or dirt that was on the metal. This is removed first. The flux will then bring up more.

[@jonasvilimaitis5749]

can i use clay instead sand?

[@myfordboy]

+jonas vilimaitis I have seen casting done with Delft clay. There are videos on here showing it.

[@tomasfell1453]

Shouldn't be the riser in the topmost position of the cast?

[@myfordboy]

I see your thinking, to allow air to escape but the place for a riser is to feed the cast with metal as it cools.

[@josetobias8859]

você colocou sal e bicarbonato de sódio ou carbonato de sódio?

[@myfordboy]

it's sodium carbonate NOT bicarbonate to degas, salt for flux.

[@josetobias8859]

myfordboy obrigado

[@ELISON.M.A]

Qual o nome da areia utilizada ?

[@myfordboy]

Greensand

[@Redsmithstudios]

OK, thanks, so cans and extruded would be fine for sculptures but not for machine parts. For fly wheels and parts that do work stick to castings. Thanks so much

[@myfordboy]

One teaspoon of each for about 5Kg metal.

[@obeyxana34]

Impressive

[@asdoor]

Hii Why the sand is black?

[@myfordboy]

It's a commercial moulding sand.

[@asdoor]

@@myfordboy How you make the sand? thx

[@myfordboy]

@@asdoor Greensand www.artisanfoundry.co.uk/product_info.php?products_id=38 You can make some but it won't be as good.myfordboy.blogspot.com/p/greensand.html

[@MrBradley911]

love the boots lol

expert

[@luvbigexplosions]

@myfordboy aahh ok thanks for that

[@myfordboy]

Sand came from artisanfoundry.co.uk

[@themainproblem]

Great videos! Would you like to be my next door neighbor? :-)

[@4AneR]

WTF!!!