Thread: Sand Blasting.

I had one attempt at sandblasting, done the job well, but the media and dust went everywhere.


My Idea to save the media to get a click clack tub.


https://www.google.com.au/url?sa=t&r...08194040,d.dGY


Cut two 4" circles in side put a flange in to hole, clamp PVA gloves to the flange.


Put a piece of perspex in lid to be able to see what I am doing.


Another small hole with a grommet for the air line.


Would this be feasible?
As I am pumping air I would need some sort of out?
What sort of would vent I need to let the air out, dust control is very important.

I found I couldn't can't just rely on the over pressure on the incoming air (i.e. a fewf CFM) to clear the dust so you will need at least a shop vac (100 CFM) to to that and set up extra vents in the box to let extra air in.
If you plan to do a lot of sandblasting, just like woodwork, you really need to have the dust extractor or vac (venting) outside the shed as they all leak and you will fill your shed up with fine dust.

Keep your eye on SuperCheap Auto - their sandblasting cabinet comes on special about twice a year - I picked mine up for $139, I think it was. I'm looking at the idea of running a vacuum port via a water trap to keep the dust out of the air.

Thanks for your replies,




I like the filter in this link about 1.05, with a Dust collector hooked up to the other side should control the dust.
https://www.google.com/url?sa=t&rct=...Ku9GogqEOnKi5Q

Most interesting ! I will be watching with great interest. I happen to know that one of my children has bought me a compressor for Christmas

a car fuel inlet air filter is the go...the larger surface area the better

My experience with the small cabinet was a stone soup story. Put stone in the pot add meat and vegetables then throw the stone away!.

1. Sand collection, recirculation was very hit and miss unless you had lots of sand or later media, and then it tended to blow around in the cabinet.
2. Would blow out around the Perspex lid, so fitted a large vacuum to the exhaust port.
3. Filter then blocked very quickly, removed cabinet filter, fitted cyclone and bigger filter.
4. Started with sand but it disintegrated very quickly and was removed quickly as dust.
5. Bought 20kg garnet, great, but would loose clarity on removable screens, bought replacement screens.
6. By this stage effort was exceeding output, retired machine went back to open air blasting. was cleaning up iron castings, no paint removal.
7. Resurrected machine with glass beads for carburettor clean up.
8. By this stage, the mesh had disintegrated to nothing, light cover was useless and rubber components were thin torn and leaking, needed a new stone so cut my losses and disposed of cabinet.

Originally Posted by A. Hudson

My experience with the small cabinet was a stone soup story. Put stone in the pot add meat and vegetables then throw the stone away!.

1. Sand collection, recirculation was very hit and miss unless you had lots of sand or later media, and then it tended to blow around in the cabinet.
2. Would blow out around the Perspex lid, so fitted a large vacuum to the exhaust port.
3. Filter then blocked very quickly, removed cabinet filter, fitted cyclone and bigger filter.
4. Started with sand but it disintegrated very quickly and was removed quickly as dust.
5. Bought 20kg garnet, great, but would loose clarity on removable screens, bought replacement screens.
6. By this stage effort was exceeding output, retired machine went back to open air blasting. was cleaning up iron castings, no paint removal.
7. Resurrected machine with glass beads for carburettor clean up.
8. By this stage, the mesh had disintegrated to nothing, light cover was useless and rubber components were thin torn and leaking, needed a new stone so cut my losses and disposed of cabinet.

I think that explains, to me anyway, why prices go from $200-$400 units, and then take a massive jump upwards

One of the biggest differences between a pro and smaller cabinets is the use of deep conical media hopper under the cabinet.
This improves picking up of the media, reduces the amount of media needed and enables media change over to be much quicker and easier, and stores the unused media away from the direct air blast improving visibility.

Always liked the idea of having one of those sand blasting cabinets but I have always wondered whether I would be left disappointed with it's quality/performance.

Some sort of cyclonic air trap would be a go for a pre filter to the vacuum cleaner. Something similar to a "jam jar" pre filter or a donaldson type pre filter that you see on snorkels of 4x4's. Althought it's just thoughts, I've never tried it...

Simon

Originally Posted by simonl

Always liked the idea of having one of those sand blasting cabinets but I have always wondered whether I would be left disappointed with it's quality/performance.

Some sort of cyclonic air trap would be a go for a pre filter to the vacuum cleaner. Something similar to a "jam jar" pre filter or a donaldson type pre filter that you see on snorkels of 4x4's. Althought it's just thoughts, I've never tried it...

Simon

There is a small moulded plastic cyclone available on EBay, I think it was. I thought it would be perfect if I wanted something like that, such as sand blasting. The price was pretty good I think. It was quite a while ago I saw it. There are also big ones. It is only the actual cyclone itself. It is designed to have a plastic bucket sit underneath with a hole in the lid.
Worth a thoght for anyone considering a sand blasting cabinet. I keep thinking of having one.

Dean

Hi Guys,

I've just ordered this :>-
<http://www.ebay.co.uk/itm/Sandblaster-Sand-Blaster-Blasting-Blast-SandBlasting-Bead-Cabinet-Grit-SBC90-NEW-/200472037005?hash=item2ead10868d:g:NosAAOSwVFlUGC2b>
With a bit of luck I should have it by the weekend. At £54.90p its nearly two thirds off the price that "Machine Mart" want for the same product.
Pictures to follow...


Dean, with respect to the cyclone, I have a dead Vax that has a cyclone in the top. It's sat in the garage at the moment, but I will drag it out and see if anything can be salvaged from it.

Baron,

Cool. It will be interesting to see the results.

I thought I would have a look for the cyclone I mentioned. As cheap as $30.77 free postage from HK or $38.00 + $9.00 local.



99 Efficient Powder Chip Filter Element Vacuum Commander Dust Collector Cyclone | eBay


Dean

I've used one of those small cabinets for a short time, without extraction it made a right mess(though better than nothing). It had a tiny filter over the hole in the one pictured on ebay. I've no idea if it ever worked but when I used it the cabinet would pressurize enough that air/media would come out all around the door. Given that 90% of the "stuff" removed and some of the media are going to try and get out of the box through said filter its no wonder it didn't work.

I'm not so sure about the cyclone. Wouldn't part of what you want be keeping the media inside the box and removing the dust?(you may then want a cyclone to stop much of the dust reaching the vac)
With heavy media you may be able to separate the media in the box with duct that is large enough that the air flow is slow enough that it has time to fall out.
Say something like this run along the back wall, stopping say 75mm from each end. The little gap at the bottom is to let the media fall back into the box(maybe?). As you'll need a hole to let some air into the cabinet the factory hole/filter should be good for that at least

Not sure this will work, as my cabinet is much larger, I assume I remove much less media, so not a great issue resulting in this idea is on the "one of these days" list.

Stuart

I was working under the impression that a vacuum be attached to extract the "dust", create a negative air pressure and so prevent the dust leaking out everywhere. The cyclone would be used to remove as much of the dust as was possible before the vacuum cleaner. BobL mentioned the need for a shop vac in post #9.

Regarding a car air cleaner filter element, I have been installing a dishwasher. A long tedious business in a 60yr old house. One of the things I had to do was grind off some concrete on the kitchen hearth as it was a bit too high. I put that concrete there to fill gaps. Anothr thing was to grind off the ends of 3 bricks, sticking out of the wall slightly for some reason. I used a shop vac to suck up some of the dust. It had a filter like a car and at least as big. I got very tired of cleaning the filter and finally gave up. A big fan blowing straight out the window sucked the dust out and limited the mess to a surprisingly small area of the kitchen. The table was still clean. Mind you, I now have a big (fan sized) white circle of dust on the fly screen thgat needs cleaning off.

Dean