Originally Posted by
peteeng
Hi Ard - I have two thoughts 1) cast the aluminium blocks in then machine all the required features into those blocks on a large router or VMC 2) cast in pockets then epoxy in anodised blocks then finish machine . I'm leaning towards 2) at the moment.... Sometimes aluminium and concrete don't like each other and the Al corrodes so epoxy is a good barrier. If I use steel I'll zinc plate them prior to in-situ casting or post placement... Doesn't affect the CAD work at the moment. Haven't had luck getting the Alumina I want local but a chinses company is quoting on a suitable spec. Local blasting grit is a bit more cost then it should be but it will be fine for casting test blocks, fingers crossed some may arrive tomorrow. I have made the CSA test blocks into trivets and they are now in my kitchen.... I will need to get some granite sealer they are a bit porous and suck up stains.... real machine parts will be sealed and painted. I'll have to get Gully onto that he's good with paint....
Using local materials ALOX/EP E90-95 ~$17000AUD per m3 ALOX/CSA E80-85 $11000 AUD per m3...... Plate Alum at $9/kg $24300 AUD per m3 so not bad.... Peter
CSA CTE 13.7 ALOX 8.1 Alum 21 steel 12 epoxy 45 cast iron 11 units um/m/C
Yong Ju make big machines. I do like BIG machines....