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Old 06-01-2006, 12:37 PM
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Dust collector for blast cabinet.

I built a blast cabinet using modified plans from TP Tools.
It works great but the dust removal system I'm using hasn't been up to the task. I was looking at two different dust collectors, one from TP Tools and the other made by Cyclone and sold on MyTools.com. Anyone had any experience with either one? Or perhaps another brand?

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Old 06-01-2006, 01:43 PM
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how about a big shop vac?
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Old 06-01-2006, 09:27 PM
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Quote:
Originally Posted by sha_ba_do_bang
how about a big shop vac?
Thats what I use. I hook the intake of the vac to my cabinet and then plumb some solid PVC pipe from the exhaust port on the vac out a nearby window. For winter use I have a small piece of solid insulation I put in the window which has a hole cut in it the size of the pvc pipe. By plumbing the exhaust out the window it also cuts down on the noise in the shop.
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Old 06-02-2006, 07:26 AM
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Thanks, guys.
The shop vac idea is a good one but I've found some real problems with that solution. First, my cabinet is in a small room. It's so noisy I have to wear ear muffs or plugs if I'm using the cabinet for more than a few minutes.
I have it plumbed to the outside using a flex hose through a dryer vent in the wall.
Using the paper filter in the vac, it takes about 5 minutes to clog the filter
To get around that, I connected the suction hose from the cabinet into a sealed bucket of water so that the end of the hose is under the water level, with another section of hose connected to the top of the bucket and to the vacuum so that the air is bubbled through the water. This collects most of the dust, but again noisy and when the bucket runs dry, you should see all of the very fine dust that blows out around the top of the vac!!. This dust and the even finer particles worry me as a health hazard. Even if they go outside, they still present a hazard blowing in the wind or being stirred up by the lawn mower. (I'm getting more cautious, in my old age. LOL especially when I see folks walking around with O2 cylinders in order to breathe!!! )
As a last resort, I've thought about plumbing the whole thing into an outside closet with a switch inside to turn it on, but again that just puts the problem outside.
What a pain
Keep the ideas coming, though.
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Old 06-02-2006, 09:04 AM
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What are you using for media? Does it have a separator? Where is the outlet on the cabinet? How much pressure are you running?
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Old 06-02-2006, 01:36 PM
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Dust collector

I work for a company that sells everything for fabrication of granite/Marble countertops. We sell a dust collector that works pretty good at cleaning the fine granite dust in the air at these shops.It has two filters that can be hosed out and reused, but the unit itself isn't cheap. It runs $750.00. It sounds like this unit maybe too big for a blast cabinet though. The dimensions are approx. 24" x 24" x 48"L . it's basically a swampcooler fan motor sucking the air/dust through the filters.
Have you looked at Grainger.com ?? you can probably build something out of their catalog to suit your needs. good luck
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Old 06-02-2006, 02:06 PM
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If I remember correctly, the glass bead blaster in our old shop (it's gone now) used to have a dust collection system that mounted to the TOP of the cabinet.

About 24" up, there was a hopper-shaped "bulge" in the pipe that appeared to be designed to produce a pressure-drop area ... where the sand could drop out of the airstream and return to the cabinet.

The dust and fine particles continued through the duct-work, exited the building, and settled out into a covered barrel.
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Old 06-02-2006, 04:16 PM
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61 Bone,
Mostly I'm using garnet, but sometimes switch to glass beads and pressure varies between 50 and 100 psi, depending on how aggressive I need to be.
I also use a benchtop cabinet to prep pistons prior to coating using 120 grit aluminum oxide at about 30-40 psi.
The dust outlet of both cabinets is in the upper far left corner, opposite the air inlet in the upper right back side.
I had to make a slide valve for the suction hose so that I could vary the amount of air pulled through the benchtop cabinet. I lost most of the fine AlO2 before I knew it, using the full suction of my shopvac.

66GMC,
I think you're right about the purpose of the bulge in the pipe. You can get commercially available separators to do the same thing, but my problem is not loosing the meadia, it's being able to hear and breathe after using the bladed blasting cabinet. LOL

Slick70,
That sounds like the same idea as my bucket bubbler and I've seen large commercial machines that use water spray to drop dust out of the air stream, but thanks for the headship about checking Grainger.

Thanks everyone!!!! Keep the ideas coming.
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Old 06-02-2006, 06:47 PM
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Iv'e got a snap-on blast cabinet. It has a small dust collector on the side and puts the dust into a large bag that hooks to it or you can leave the bag off and run it out a wall vent like a dryer vent. Which is the better way to go. No changing or cleaning of bag that way.
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Old 06-05-2006, 02:07 AM
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Try (www.surpluscenter.com) they have many types of blower fans with different CFM outputs. If the noise bothers you put the fan outside so it draws the air out(use a filter at the blast cabinet to catch media) mount the fan on a box with a filter on the exhaust from that box to protect the neighbors.You could even use an old furnace blower to draw the air out.
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