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  #1  
Old 20-03-09, 01:39
cletrac (RIP)'s Avatar
cletrac (RIP) cletrac (RIP) is offline
David Pope
 
Join Date: Jul 2003
Location: Eston, Sask, Canada
Posts: 2,251
Default Sandblasting cabinet

I figured I needed a place to sandblast where I could contain the sand so I modified this old water tank that blew out of the truck one day and split open. The second time I used the sand it got so dusty in there that I couldn't see what I was doing. I put a 220 volt ventilation fan out of a barn in the filler hole and added the piece of ducting to blow the dust outside. I also added a couple of 300 watt lights. Now I could see what I was doing and am in clean air when blasting.
One thing about containing the sand, every cat on the farm wants to use it as a litter box. I rigged up that screening box and put it against the side of the tank. I'm putting a hopper on the inside of the tank so you scoop the used sand into the hopper and it runs down over the screen. Now I can keep the cats out of the sand. That screen thingy is something out of the oilfield that I picked up at the dump. It's a fairly heavy plastic grid with stainless screen on one side and works like it was made for the job.
The fan moves enough air that all the fine dust goes out the door so I can reuse the sand a number of times.
Attached Thumbnails
sandblast cabinet.jpg   fan & light.jpg  
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1940 Cab 11 C8 Wireless with 1A2 box & 11 set
1940 Cab 11 C8 cab and chassis
1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun
1940 Cab 11 F15A w/ Chev rear ends
1941 Cab 12 F15A
1942-44 Cab 13 F15A x 5
1942 cab 13 F15A with 2B1 box
1943 cab 13 F15A with 2H1 box
1943 Cab 13 C8A HUP
1944 Cab 13 C15A with 2C1 box
1943 Cletrac M2 High Speed Tractor
MkII Bren gun carrier chassis x 2
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  #2  
Old 20-03-09, 03:10
Geoff Winnington-Ball (RIP)'s Avatar
Geoff Winnington-Ball (RIP) Geoff Winnington-Ball (RIP) is offline
former OC MLU, AKA 'Jif' - sadly no longer with us
 
Join Date: Feb 2003
Location: Toronto, Ontario, Canada
Posts: 5,400
Default Cat Problem

You could always just rig it to turn on the lights and the fan the moment a cat walks in - might take you days to find the cat again but I guarantee it won't be back!

Of course, the word might get out in the local kitteh kommuniteh that there's a price on your head... lotsa sharp fings out there....

Nice work, though!

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  #3  
Old 20-03-09, 12:27
cantankrs cantankrs is offline
Alex McDougall
 
Join Date: Feb 2009
Location: Kalgoorlie, Western Australia
Posts: 200
Default air volume, and media containment

Hi David,

Great thinking and great work! Just wondering how many cfm your compressor puts out to run your rig?

Also I've heard of people connecting 1 or more compressors airlines together to get the required volume on a job.

I've seen blasting done in a sea container.

And I've heard of someone making a blast cabinet out of an old fridge that still had good magnetic door seals.

But dust extraction and lighting and your health are the next problems as David touched on.

Garnet is 'meant' to allegedly be non-toxic (how many decades will it take to really tell - like mobile phones) where as common as muck silica sand could give you a permanent dose of silicosis.

Stay Safe

Regards

Alex

Last edited by cantankrs; 20-03-09 at 12:42. Reason: replaced 'generations' with 'decades' - generations was bad word choice
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  #4  
Old 20-03-09, 16:37
cletrac (RIP)'s Avatar
cletrac (RIP) cletrac (RIP) is offline
David Pope
 
Join Date: Jul 2003
Location: Eston, Sask, Canada
Posts: 2,251
Default

Alex,
I've got a 5 hp and a 3 hp compressor hooked together to run the blaster and they'll just keep up at 100 psi. I've got a 4 cylinder one with a 7.5 hp motor but haven't got it running yet.
Getting rid of the dust when blasting is very important. Even if you had grit that wasn't dangerous, I can't imagine the fine paint and rust dust would do your lungs any good. I wear coveralls, a breathing dust filter, ear plugs, and a sandblasting hood with replaceable Plexiglas lens. With that fan on the cabinet I'm working in clean air, but you can still get the stuff blowing towards your face when it bounces off the work.
When I need to blast something that won't fit in the tank I do it outside with the used sand and just let it go.
I bought $130 worth of sand and used about $100 of it blasting the four wheels for my C8 so you can see why I need to reuse it as many times as possible. With the cabinet I might be able to use river sand instead of bought stuff as the dirt won't be such a problem.
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1940 Cab 11 C8 Wireless with 1A2 box & 11 set
1940 Cab 11 C8 cab and chassis
1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun
1940 Cab 11 F15A w/ Chev rear ends
1941 Cab 12 F15A
1942-44 Cab 13 F15A x 5
1942 cab 13 F15A with 2B1 box
1943 cab 13 F15A with 2H1 box
1943 Cab 13 C8A HUP
1944 Cab 13 C15A with 2C1 box
1943 Cletrac M2 High Speed Tractor
MkII Bren gun carrier chassis x 2
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  #5  
Old 22-03-09, 01:23
maple_leaf_eh maple_leaf_eh is offline
Terry Warner
 
Join Date: Mar 2004
Location: Shouting at clouds
Posts: 3,081
Default bead blasting plastic media

Over on canadiangunnutz last month there was some discussion of using plastic beads for blasting gun parts. The guys using it were in Edmonton and found a big-time industrial supplier who sells it by the fifty-pound bag.
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  #6  
Old 22-03-09, 05:24
cantankrs cantankrs is offline
Alex McDougall
 
Join Date: Feb 2009
Location: Kalgoorlie, Western Australia
Posts: 200
Default

Thanks David, Good info.



Alex
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  #7  
Old 22-03-09, 10:30
rob love rob love is offline
carrier mech
 
Join Date: Feb 2003
Location: Shilo MB, the armpit of Canada
Posts: 7,517
Default

All of my sandblasting, both on the indoor cabinet and out in the blasting shed, are done with regular yellow sand. Here in shilo, the top soil is only about 6 to 12" thick, and under that is all sand. I will harvest it after a couple of dry days. Of course, any moisture will cause the sandblaster to clog. I usually keep about 6 garbage cans full of it dry and sifted. I have not paid for a bag of sand in years. The results are very good overall. The silica might be a bit better, but not $8 a bag better.
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  #8  
Old 31-03-09, 04:14
cletrac (RIP)'s Avatar
cletrac (RIP) cletrac (RIP) is offline
David Pope
 
Join Date: Jul 2003
Location: Eston, Sask, Canada
Posts: 2,251
Default

I did about 5 hours of sandblasting on C8 stuff today {5 seats etc} and am impressed with the cabinet. When I was done I blew my nose and there wasn't a trace of dust. Before it didn't matter how careful I was I made mudballs when I blew my nose. I'm sure the lungs will appreciate this.
I reused the sand 8 times and it wasn't much dustier than when I started. The dust gets sucked out the moment it's created. I'll be able to reuse the sand until it just disappears. The old pocketbook will appreciate this.
Now I just shovel the used sand into the hopper then shovel the sifted sand into the blaster tank. Before it took as long to do this as it did to use it up. Now it just takes a few minutes.
I threw a piece of sheet metal on the tank floor to keep from blasting through the plastic tank.
__________________
1940 Cab 11 C8 Wireless with 1A2 box & 11 set
1940 Cab 11 C8 cab and chassis
1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun
1940 Cab 11 F15A w/ Chev rear ends
1941 Cab 12 F15A
1942-44 Cab 13 F15A x 5
1942 cab 13 F15A with 2B1 box
1943 cab 13 F15A with 2H1 box
1943 Cab 13 C8A HUP
1944 Cab 13 C15A with 2C1 box
1943 Cletrac M2 High Speed Tractor
MkII Bren gun carrier chassis x 2
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