Manufacturing cylinder heads

[sierra3dr]

I'm sure there's a good number on here know already how cylinder heads are produced. I've learnt that evaporating foam is used. What was used before evaporating foam was invented?

[zipgun]

Green sand (sand and clay) and the cored parts will be sand with a stronger binder ..(sodium silicate.. starch.. clay etc) Alloy heads are more likely cast in plaster than foam .
Pop over to Alloy Avenue website, you don't need to register to look

Here's a good example of what can be done with foam !
http://www.alloyavenue.com/vb/showthrea ... light=foam

[sierra3dr]

Thanks zipgun. The linked website is fascinating

[JPB]

^^^^ Wot he said.

I could read and absorb that sort of thing all night through and most probably shall.

[SirTainleyBarking]

Oh Gawd thats going to be another 12 hours of my life gone..

[jimmyybob]

So foam is the new version of lost wax casting.
We still have all our parts cast the old fashioned way with wood patterns and sand casting.