ChrisNH

HBlog-16.jpg I have finally completed my spray booth! I am excited to have this done, both so I can use it and so I can move on to scenery on my layout. To keep it from being prepetually almost done I stayed on the project as I found time rather then move forward with other things.

The inside has been painted white to seal it. I have little expecation that it will stay white. I will either repaint it or cover it in poster board as required.

I made a small table for it out of scraps left over from various projects. I even used recycled screws.

 

 

 The fan was mounted by creating a wood spacer that was screwed into holes in the blower. For anyone who gets the same Dayton 1TDR3 blower, it took metric M6 machine screws. I countersunk wholes so they would be flush, then bolted that assembly to the back of the booth using 1/4" carriage bolts. The idea was to make it easy to remove. It also provided a spacer for the flange on the exhaust. If I did it over, I would make this much larger to facilitate mounting. By the way.. I apologize for the jump in the pictures. I had some nice ones showing the mounting but they got deleted in a moment of foolishness.

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Below left you can see the 1" 16x20 furnace filter in its slot and how the motor looks from the business end of the booth.

Rather then shell out $10 for an adapter, I bought a $3 duct "starter" and sandwiched it between two pieces of 1/4" plywood scrap. I clamped and glued to hold them together then used some left over latex caulk to seal it. This was then mounted to the blower using 1/4" hex bolts. Were I to do it over, I would mount this BEFORE putting the blower on!!

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 I ran a duct using "semi rigid" 4" pipe through an adustable 4" elbow and out a dryer vent mounted rather unceremoniously in the window. I will be insulating that down the line. Its all jury rigged, I plan to replace the table I have now in the spring when I frame the wall its against. That will let me cantilever a work bench, put the blower under the window, and also support St Johnsbury yard! At that time I will put in a more permenant rigid pipe which will give better performance.

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This shot shows my finished product, the shoddy ductwork (yes, thats clothes line holding my duct), and the two switch electrical box I put in. One switch turns on the shop light that shines down through the plexiglass, the other turns the motor on and off. Its wired into a plug that can be unplugged as required. The whole thing is portable. I wired the light in by clipping the plug off a shop light and wiring it right in. I will replace the plexiglass in the near future with more easily cleaned glass. This light turned out really well. It is VERY bright.. there is almost no shadow in side the box. The suction seems to keep the walls from getting painted.

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My craftsman 2 gallon compressor is underneath. At some point I will make a hanger for my air brush. For now I am making do with the thing I have clamped on to the side.

Someone wrote to me and asked me what light I am using. I am using THIS with all the junk pulled off of it. Its big enough to take a 100 watt CFL and still stay flush on the top of the glass. I have a 6500K lamp installed. This is the same as the 20 watt lamps I have installed on my layout. What I see painted is what I will see on the layout.. warped walls and all! Yeah, I tried it out. It worked great.. but the result on my laser kit wasn't pretty. I have a lot of learning to do..

Regards,

Chris

“If you carry your childhood with you, you never become older.”           My modest progress Blog

Reply 0
Dustin

Nice Trees

Those are some nice trees.... and the spray booth looks good too!

Enjoy,

Dustin

 

Dustin

Reply 0
MarcFo45

+

Nice work Chris.  Thanks for your comments. This will help me when I get  around to it later.

How efficient do you make it out to be, smell gone.  Apart what you mention here anything different you would do, size. Does the filter show it's effect media getting dirty, Is it even  filtering or more concentrated at the air intake.

Marc F

Reply 0
BlueHillsCPR

Awesome!

Looking good Chris.  Thanks for the update. 

Reply 0
ChrisNH

Seems to work

Marc, the smell seems to be gone when using the  air brush with thinned acrylics.  The filter didnt pick up much of that, most of that overspray is on the painting surface. I didnt wear my mask which I usually do wear when spraying in the basement. A big improvement in comfort. The mask will still be handy for spraying on the layout.

I did try spraying a few trees using canned Krylon H20 spray paint. The smell remained noticeable, but I think it was coming off of the drying paint on the tree itself. The filter has a big splash of green from that, but I was spraying toward the filter.

I have since put a white paperboard liner on the bottom of the booth and most of the spray seems to land on that if I am pointing a little down. I am not sure of a better way to test. Maybe I can light a small bit of paper on fire and blow it out to see where the smoke goes.

Most of the stuff I am spraying right now is heavier paint. It will be interesting to see how it works if I spray something that atomizes finer then the cheap craft paints I currently have. I have not observed any paint collecting on the sides or the top which makes me optimistic. A lot of air is coming out my vent in the window!

Chris

“If you carry your childhood with you, you never become older.”           My modest progress Blog

Reply 0
MarcFo45

++

Thanks Chris.

Marc F

Reply 0
MarcFo45

+++

Chris...

Another question came to mind while planning my booth.  Your 16 X 20 filter, how much surface of the filter gets contaminated with your present configuration; fan at bottom with a partial plenum from the top. 

I ask because if the filter surface is not all used maybe I can get by with half a filter and save the second half for later. Otherwise I think it may be a waste of filter. Another idea is to flip the filter are a certain time of use.

There is a sale on of cabinets up here for 99$. 30 X 17 X 96. My present plan is to get a few and use this as the base for the booth. Save me a bunch of cutting and fitting.

Marc Fournier   

Reply 0
ChrisNH

Not sure

I am not sure how even the draw is across the filter. I built in a 4" plenum and sloped the back to increase the area as you observed. It may be fine to have a filter in a smaller area and a larger area in front of it for the spraying but I have not seen this done in actualy practice in any commercial spray booth I looked at.

I have not used this spray booth enough to see where the paint is collecting. There is one big green spot from the spray can and thats it. My one fear would be the corners of the booth would not experience enough air motion and over spray could settle elsewhere.. like the work piece. Also, if the filter is smaller, it may just end up clogging that much faster.

Do shop around for the cost of filters, you may find that its not all that much of a cost for the basic ones at one of the big home stores. Flipping the filter doesnt seem helpful. If the filter is clogged, its still clogged when you flip it. I suppose you could rotate it top to bottom to move the saturated spot. 

Perhaps someone who has more long term construction with booths of the type I have built will be able to comment on their experience.

Chris

edit- one other thing to consider, if you increase the size of the spray area to 30x17, you will need a better blower to have the same air draw.

“If you carry your childhood with you, you never become older.”           My modest progress Blog

Reply 0
MarcFo45

+

Thanks for the first hand insight Chris.

Marc

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