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sand blasting sucking

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patsdeere

12-17-2007 20:26:04




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I have a little desktop box and was looking at getting a better vacuum to suck the dust off. Any suggestions? Prefer something not too big as space is somewhat limited.
I have been using a shop vac, but figure it wasn't made for it and probably isn't the greatest thing for it.

Thanks.




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dobber

12-26-2007 13:57:56




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 Re: sand blasting sucking in reply to patsdeere, 12-17-2007 20:26:04  
A shop vac can work fine for a small one like that if it's what you have. One thing to make sure of is that you have a good filtered air inlet into the cabinet so the vaccuum can draw more air through there or the cabinet will just cloud up bad. I just made a air inlet filter for my large blast cabinet with some wood with scotch brite pad stapled to it. I put the foam filter and two paper filter sheets on vaccuum and just clean it out when it stops pulling much air. You can put another pipe or deflector inside to put most stuff at bottom of vaccuum too.

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John Hicks

12-20-2007 01:03:23




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 Re: sand blasting sucking in reply to patsdeere, 12-17-2007 20:26:04  
I had the same problem. I reuse the blast media and each time I re used it the dust was worse. Got to where I couldnt see in cabinet after a few seconds of blasting. But I went the other way , instead of more vaccume I started cleaning up the sand. This was for two reasons 1. The nozzel kept stopping up and 2. The health issue of so much dust. Here is what I did. I got outside my shop with a box fan and a large (aprox 8 in ) kitchen strainer and a couple of 5 gal plastic buckets. I put the box fan on the ground pointing down wind and put an empty bucket in front of it about 3 or 4 feet away depending on how much dust you want to blow out. The other bucket is full of new or used sand ( I use amber media from Northen Tool)and with a large scoop I slowely pour the sand through the strainer into the empty bucket. I hold the strainer about 10 inches above the bucket and I hold the scoop about 6 to 8 inches above the strainer. I blow out the dust both above and below the strainer. I probably loose 20% of the sand volume mabe more BUT I dont have any more nozzel stop ups while Im blasting , The media cuts a lot faster and the shop vac does an adequate job with very little sand and dust in the vac. I do this every time I reload the sand out of the cabinet into the blast machine hopper. I also wear a full face cartridge respirator while doing any of this and stay out of the path of the dust trail.

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patsdeere

12-20-2007 15:05:10




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 Re: sand blasting sucking in reply to John Hicks, 12-20-2007 01:03:23  
I always wear a respirator when I am using the stuff. I use some Al Oxide and it cuts pretty well, but seems to go to dust pretty easy and sucked into the vac. I am concerened about the sand going through the shop vac motor (since I am sure it wasn't made for this super fine stuff). Plus it makes the shop vac sooooo bloody heavy to move since all the weight is in the bottom 1 inch of the thing. I always try and blow the motor out with the compressor, but I am sure there is some that gets into grease or oil and that can't be good for the thing. Not to mention that it clogs the air filter up almost instantly (which just makes the old sucker suck even harder).

I tried straining it and that helped me reclaim some, but it seemed to make it all that much dustier for a while.

I am considering that I may have too much sucking power on the shop vac I am using and that maybe a lighter sucker would be better since it couldn't suck the sand right out of the box (figuritevly). I debated getting a reclaimer type gizmo, but they are a little pricey for me.

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John Hicks

12-20-2007 22:58:11




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 Re: sand blasting sucking in reply to patsdeere, 12-20-2007 15:05:10  
I dont get very much sand in my vaccum at all. I put a piece of 1/4 inch thick open cell foam over the air exit area of my blast cabinet (homemade out of 3/4 plywood and lined with old rubber car floor mats )this filters out most of the dust leaving it in the cabinet. I take a bench brush and brush it off after I remove the used sand inside the cabinet . Then I just brush it into a dust pan and throw away. The biggest help is blowing most of the fine dust out of the sand when I restrain it for the next use. You have to play around with the closeness and direction of the box fan and the speed that you pour it through the strainer also the height above the catch container is important. Thus a fan up close blowing across the top of the catch container and a strainer high above the container and pouring slow will remove the greatest amount of dust and fine sand. My shop vaccum has the paper cartridge filter removed and the cage where it goes is wraped with 2 layers of 1/2 in open cell foam. Very little seems to get buy it but again must stays in the blast cabinet.

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circus

12-18-2007 04:31:15




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 what? in reply to patsdeere, 12-17-2007 20:26:04  
desk top box? You sandblasting computers?



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patsdeere

12-18-2007 12:24:13




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 Re: what? in reply to circus, 12-18-2007 04:31:15  
Don't you?

I have one that sits on top of a workbench. Kind of the size of bread box on steroids.



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