07-08-2018, 08:27 PM
Given the amount of sand used for a home shop foundry it's not that difficult to renew the sand by hand. If you have a large enough piece of concrete just make sure its good & clean before dumping the sand on it. Work the sand with a garden rake adding the appropriate amount of water or oil depending on what your're using.
I've also known of people using a small cheap mortar or cement mixer as a muller. I was taught to test the sand by grabbing a handful and squeezing it into a rough cylinder. It should hold together by itself but not ooze, drip, or release any liquid.
I've also known of people using a small cheap mortar or cement mixer as a muller. I was taught to test the sand by grabbing a handful and squeezing it into a rough cylinder. It should hold together by itself but not ooze, drip, or release any liquid.