Bought a grout mixer: sand muller lookalike

More than a few guys on this forum use a modified cement mixer although the USA version is different to an Australian cement mixer.

 

Yep I used to do the old cement mixer and shotput version a many years ago. Worked pretty well for green sand. From memory I am pretty sure I got the idea from these forums.

I have long since built a muller somewhat similar to the 'Kooka Muller' seen on the Tube although mine has two mulling wheels with a completely different spring
tension system for the wheels and a different scraping set-up. Lots of trial and error

As with that and many other casting related projects reading these forums over the years has been of enormous benefit - absolutely invaluable!

I can look at the pictures now too!!!


Charlie

 

I put some crushed rock suitable for making concrete into the grout mixer to try and scrub the rust off the bowl and it nearly jammed a couple of times as the outer blade has 10mm clearance from the bottom and the outside wall where stones can wedge. I'll try and add some rubber conveyor belt and bolt it to the rotating blades to get a minimal air gap and see how that goes, failing that, some extra steel welded on the blades. I'd really like it to be able to handle a refractory concrete mix sized aggregate while I make this new furnace. Other geometries like a set of comb like fingers could work too.