Help with casting

[AbecEngineering]

Going to cast aluminium cylinder and wondering if I should use a core for the centre or just drill the centre out if so can u please explain how to do it ?

 

[Herbiev]

Making a core is the way to go. Too much waste in pouring a solid cylinder only to remove half of it again. I'll let the more experienced folks explain the details but I believe the core is rammed into a length of pvc tube and a stiff wire through the centre of the core.

 

[willburrrr2003]

I use Molasses mixed with sand to make my sand cores. I use a tube(that is slightly smaller than my rough diameter) to pack it in. then I remove it from the tube and bake it to harden it up a bit. Then I place it into my mold cavity, in the appropriate spot. When you pour your casting, the heat will cook off most of the molasses . After it cools, take a poke stick to the sand in hte hole and it should come out fairly easily.

Regards,

Will

 

[abby]

Abec you have not said how big (or small) your cylinder is to be , if the bore is less than an inch diameter then you could bore it out in less time than it would take to make and fit a core.
If your casting does need a core ( I would use airset ) remember to include core prints on your pattern.