R.W Gas Engine

[dsquire]

Hi Rob

Other than the fact that you were a bit shy of molten aluminum it looks like it came out pretty good. Thanks for showing us this and I'll be waiting to watch the next pour whenever that is. 

Cheers 

Don

[Rob.Wilson]

Hi Don

I though it would be best to show my  cock ups  as well   ,, What i did learn from it was  that the  core wash i made up was crap , and i need a stronger rack to bake the cores on as they sagged a bit   , i was pleased with the way the core lined up with the mould 

Cheers Rob

[Stilldrillin]

Well..... 

I never thought I`d see the day....... 

He is human, and fallible, after all!   



Very well shown Rob! 

David D

[John Stevenson]

Cut it in half and make a single cylinder model 

That'll teach you to nick my double decker..........................

[doubleboost]

You needed the big crucible (you told yourself that)
John

[Joe d]

Rob

This is going to get expensive, since you've got to send the Mrs shopping again so you can bake more cores... I was wondering how they worked, and now you've shown it.  Ta mate.

Joe

[Rob.Wilson]

Hi Lads 


David ,,,,,,,,, i mess up all the time , just had years of practice hiding it 

John S ,,,,,,,,,  your lass said i could have the double decker as you need to cut down on them 

John ,,,,,,,,,,, that was the big one    ,, good job i built a big furnace 


Hi Joe ,,,,,,,,, What , it would be cheaper to by an oven for the shop    , looks like i will be going round the second hand shops over the next few days 


Cheers Rob

[Brass_Machine]

Heya Rob....

Well, one side looks really nice. I mean outside of not enough alloy, it looks like it will come out as a nice casting next time. I am still very impressed. 

Eric

[Dean W]

Thanks a lot for showing your steps Rob.  It sure did a lot to remedy my head scratchin' problem. 
I was having a hard time seeing it all come together until you did the cores.  Very interesting.

Too bad about he short supply of metal.  All the pics are sure appreciated, in spite of that little trouble!

Dean

[sbwhart]

Great post Rob,

It wasn't a mistake just a step up the learning curve.

Look forward to the next attempt I'm sure it'll be a keeper.

Stew

[madjackghengis]

Well Rob, in spite of the bit of shortage in the metal department, the ramming of the pattern, the skill demonstrated in pulling the patterns, setting up the added height for metal, the whole cleanliness of the operation showed you've got it right, just the metal issue is all.  By the way, what are the pieces you are melting and pre-heating to melt into your pot?  Just curious.  I've got to say, the finish on the part of the casting which did come out is as good as I expected it to be, and I think you'll get a good pour as soon as you've got the bigger crucible going.  Great job with the pictures, nice and clear, and showing the important details, all in all, pretty good for a failed pour.   mad jack

[Artie]

Hi Rob, sorry to see that .....  bugger 

Ive done this a time or two myself..... its all part of the deal isnt it?

..... when I first resurrected the foundry I had a couple of large pours to do so I built a large crucible from steel. Its hard to get decent sized ceramic crucibles way out here... Im in the process of building an even larger one. They work ok but have a limited lifespan.

Looking forward to seeing the end result. I know youll get there.

Rob T

[Rob.Wilson]

Hi Lads  
STRIKE TWO !  

Here is the result of today's casting .

Looking good so far , enough metal this time  


core wash needs spraying on   when i fined my spray gun

cope side not so good , shrinkage due to not enough metal feeding the mould ,,,,,,,, need to add hot metal risers  



Mad jack ,,, the things i am melting down are dust/dirt caps that go in the end of hydraulic couplings , they are off 360 excavators ,,, i have a few hundred

Hi Rob T ,,,,,,,, I went for a steel pot   ,, i had materials lying around the shop  

Until the next instalment Rob  

[John Stevenson]

Looks like I need a bigger Ju-Ju doll to stick bigger pins in, this bastard nearly didn't work..............

John S.

[Rob.Wilson]

Hi John    , so that pian in my chest is you and not all the tabs i smoke ,,,,,,,,,, thats good to no 

Looks like I need a bigger Ju-Ju doll to stick bigger pins in, this bastard nearly didn't work..............

John S.

[Artie]

I am supposing that, out there somewhere is a few guys who would look at a plug n say "at'll need one riser 'ere n 'nother 'oer 'ere" and be correct.. Unfortunately I aint one of em.... thats a thing experience will tell you.... Rob you are well onto your way with gaining that experience... with that in mind this was a very valuable experiment.

And luckily if it gets to strike three... its simply move onto strike four... no "yer out!"

Good luck mate, Im watchin you....

watchin every thing you do....

But i just cant help but feelin

Someone else is stealin

you away from me

I gotta get that song outta my bloody head....

[Rob.Wilson]

Hi Rob 

I had a feeling it would need some risers some were ,,,, it all ways takes me a good few attempts to get things right ,though i may as well show all steps in getting a usable casting .

On the plus side i do get to fire up the furnace again 

Cheers Rob

[Artie]

and of course all it costs is some gas and your time.... thats what I like so much about it..... 

[Dean W]

I'm sure you'll get it next time, Rob!  Too bad about the shrinkage.

Can you reuse any of the sand after you've done the pour, or do you make up a new batch each time?

Dean

[Stilldrillin]

Ohh, Rob! 

That was close......  ....... Bugga! 

Onwards and upwards, as they say...... 

Good luck to you for episode three! 

David D

[sbwhart]

Nice work Rob

Now for the silly ?.

What does a risers do is it some sort of Viagra for casting 

or is it a hole for letting gas out ? :- even more snigers as a double meaning springs to mind. 

Stew

[Rob.Wilson]

Cheers  Lads  

Hi Dean ,,  The only sand i cant re-use is the core sand , thats a one shot deal ,, the moulding sand gose back into the bench and gets re-used

Hi Stew   yep risers are viagra for castings ,, they help out the bits that sag a bit  


John ,, you need to get a better JU-JU doll , or read the instructions  

Cheers Rob

[Dean W]

Thanks Rob.  So, anytime you just do a regular ram up, the sand can be recycled, is that right?

Dean

[Rob.Wilson]

Hi Dean

Spot on  , with green sand casting all you have to do is re- temper the sand with water,  it has a green bond . The sand dose deteriorate with use so you just add more sand to the pile to freshen it up , the hotter the metal the quicker the clay in the sand breaks down and the life of the sand is reduced .



Cheers Rob

[John Stevenson]

John ,, you need to get a better JU-JU doll , or read the instructions  

Cheers Rob

Bollox, just read the instructions and I need to dip the pins in the blood of a virgin first.
Well that shags the whole setup up then don't it, chances of spotting a virgin round here are the same as Lord Lucan winning the grand national on Shergar.

Looks like you are safe for the next pour, mutter, bollox, rhubarb and double bollox.

John s.