Sand blast cabinet – hopper

I didn’t get any pictures, or if I did, I can’t find them, but after building the work support out of 1.5″ x 1.5″ x 11ga angle iron that measures 58″ x 34″  this will give me plenty of space to clean a fender and possibly a bumper.

I started with cutting out the hopper out of 18ga sheet which I then clamped to the work support frame.

I was going to use a spring loaded trap door at the bottom of the hopper to allow me to drain it and replace the media when necessary. The trap door I’m using came from TP Tools, so I made a spacer out of some steel I had laying around and clamped it in the hopper. 

I kept cutting out the 18ga sheet to make the other two sides and ended up with a decent funnel shape. When I was in high school I worked at a HVAC company where I made plenums. I sure wish I had the sheet metal brake and spot welder that I used in that shop. I then proceeded to tack weld it together.

After everything was together I moved on to fully welding the joint and grinding it smooth.

I double-checked that the trap door would fit the hopper.

When this was done, I turned it over and added seam filler to the joints. The idea is to make a box that is air tight enough that the vacuum will draw air through the inlet and not all over the place. I don’t want it leaking like a sieve. It’s not a good picture but it’s all I have from this step.

  1. #1 by Tom Schulte on April 13, 2013 - 8:33 pm

    I really enjoyed your detailed description and photos for your blast cabinet and hopper. I am trying to do the same building a hopper. I picked up a stainless steel vacuum lab cabinet that I want to modify into a blast cabinet. It is 40″ by 24″ and I am attempting to get a mock up of the hopper before cutting stainless steel. I started with a 1/3 scale model using stiff paper chipboard. After multiple attempts to get the angles to line up, there isn’t much slope. I just picked up some foam board at the office supply store and I will attempt a full scale model, then use each piece as a template. How did you mount the TP Tools trap door to your hopper? Their web site says it is plastic. Thanks for a great site.


    • #2 by codeblooded on April 13, 2013 - 11:42 pm

      I posted a detailed entry on how I made my hopper.

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