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Big Boys CAD shootout for SOD

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JasonB19/05/2022 14:42:22
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25215 forum posts
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My castings turned up today and I'm quite pleased with how they came out particularly as it was my first pattern with a core. External surface finish could have been a little smoother but I think that is one of the problems with airset as they don't seem to sieve any fine sand on first and just ram it up in one thick layer which can leave the sand surface a bit porous so the iron replicates that. These are the bits from my patterns



The bit of writing that was a last minute addition turned out quite well, easily read yet out of sight for most that will view the model.





And here is the rest of the "set" including the scotch yoke which is a brass casting and the spun brass piston which will give it a thin wall and light weight which should help with running. There is also an iron flywheel casting that I forgot to include in the photo



I just need to catch up with Graham now who is posting good progress over on his Facebook Page

 

Edited By JasonB on 19/05/2022 14:46:36

PatJ19/05/2022 15:04:04
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That is a great looking set of castings.

Turned out very well.

You can improve the surface finish if you can get them to spray on a layer of ceramic mold coat.

It is generally alcohol-based, so you spray it on and then burn off the wet part.

Works wonders for surface finish.

Great job.

I can't get at the FB stuff, so be sure to keep us up to date here.

.

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