Metal Casting at Home Part 18 Cantilevered Core

[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?

[myfordboy]

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

[ganaschico]

what is it?

[myfordboy]

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

[larz0001]

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

[reymer101]

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

[myfordboy]

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

[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]

@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.

[luvbigexplosions]

@myfordboy aahh ok thanks for that

[BackstrokeOfTheWest]

It's the starship enterprise!

[securadeguitarhero]

A doubt!

In fact the substances you put into the molten aluminum was:

* Salt

* Sodium Bicarbonate  And what else?

[myfordboy]

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

[kraldankral01]

expert

[coriander2]

Myfordboy. You are good. Should be on Discovery channel. Always a pleasure to watch.Thanks again.

[EmperorAst]

You should consider making a moulding bench.

[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 ;-)

[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!

[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]

@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.

[tsukubadiver]

Thank you. Your videos are a vicarious source of relaxation for me. Where I live I hardly need a screwdriver and rarely have a need to even touch machinery. Long ago the connection between metal and flesh was a very important part of my life. Your videos work to keep that feeling alive.

[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.

[AllenTrucks]

about how long does it usually take for all that aluminum to melt and what are you useing for a torch and what gas are you using

[myfordboy]

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

[timothysvec]

love your video's

[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?

[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.

[MrBradley911]

love the boots lol



[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?

[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.

[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.

[steamwally]

Great video, I really enjoyed that.

[Arnthorg]

What's that casting for ?

[myfordboy]

@Arnthorg Crankcase for model engine.

[glazkinsergey]

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