If you are making large quantities of frit, you may want to consider building a mechanical frit grinder from a garbage disposal and a galvanized garbage can. This set up can process a vast amount of scrap glass into frit rapidly, but there are some pros and cons, and a few tips to make your frit grinding more successful.
The disposal is mounted in the lid of the garbage can (yes, you do have to cut a hole) using the hardware that comes with the disposal. Here’s a view of the bottom of the lid:
I’m using a heavy duty extension cord for the wiring. It is grounded to prevent shocks. If you are not electrically inclined (I’m not either) then it’s a good idea to have an electrician help you with this part.
The broken glass is poured into the top of the disposal, gets whirled and ground by the blades inside and shoots out the hole in the side of the disposal into the galvanized garbage can. Here’s where the glass comes out:
That seems pretty easy, so, here are the other things to remember:
No one wants rust in their frit, so, what to do? Well, you can easily use the same thing that caused the rust in the first place to clean it off. Run some waste glass through the machine, it will quickly scour the rust away. Then, simply discard the rusty frit, and you are ready to go.
There is a vacuum hose that come off of the lid of Chewy, then into the vacuum port of the shop vac (I’m using a Bucket Head Vac). A HEPA filter in the shop vac is an excellent idea. There is a second hose coming off the exhaust port of the shop vac and into a bucket of water. The exhaust from the vacuum bubbles up through the water, catching a lot of dust. I also float a filter made from an evaporative cooler pad on top of the water so the bubbles don’t just release their dust back into the air. Here’s the water bucket with the lid off.
You can see it’s quite mucky. Since this is the last stop for the dust, it doesn’t really matter. Right now it’s frozen solid, so I can’t make a video for you, maybe in a few months! When I get an accumulation of dust in the bucket, I let the muck settle, then pour off the clear water, package the muck up in a sealed bag and discard. Even with the dust trap, you must wear a respirator.
Other things to know:
Liability Disclaimer: This article is for informational and entertainment purposes only, constructing the tools and processing glass is at your own risk! Be safe!