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  1. #1
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    Default DIY Water proof Vapour Blasting Cabinet

    Hi Gents,
    I have just discovered that it may be relatively easy to make a 'working' DIY Vapour Blasting setup, but I am still trying to find the perfect place to start, ie water proof Cabinet.

    I already have a Clemco steel cabinet, but I don't think it would be suitable to use water in it as it will rust quite quickly. I will sell that once this is working.

    The Hare and Forbes cabinet are all steel as well, abeit painted on so will fair a bit better.
    I have seen the large plastic drums used but they are a bit problematic as well. ( it's difficut to add a window to a round object )

    I really want a square sided water proof cabinet. It looks like I may have to faricate one from scratch, but that has hurdles as well....

    What material to use? Plastic sheet with a metal frame? Plastic sheet would be expensive and a bit of work to cut to size. I'd then have to seal the edges.....

    Don't think a plywood sided cabinet would last long in a wet enviroment, even if I did seal the inside.

    Ive seen a dishwasher carcass used ...... possible but I thought maybe a little small? ( need room for a wiper on the inside of the window. )

    Thought about large plastic storage tubs from Bunnings, but they seem a bit small as well.

    Aluminium enclosure bent up and welded?....very spendy!

    Anybody have any other I deas I may have overlooked?

    Steve

  2. #2
    BobL is online now Member: Blue and white apron brigade
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    Quote Originally Posted by Sterob View Post
    Hi Gents,
    I have just discovered that it may be relatively easy to make a 'working' DIY Vapour Blasting setup, but I am still trying to find the perfect place to start, ie water proof Cabinet.

    I already have a Clemco steel cabinet, but I don't think it would be suitable to use water in it as it will rust quite quickly. I will sell that once this is working.

    The Hare and Forbes cabinet are all steel as well, abeit painted on so will fair a bit better.
    I have seen the large plastic drums used but they are a bit problematic as well. ( it's difficut to add a window to a round object ) .
    Not really - provided its a cylinder or conical and and not egg shaped.
    I use 1mm thick Polycarbonate (PC) because it's very flexible and strong.
    inputPort.jpg


    [QUOTEI really want a square sided water proof cabinet. It looks like I may have to faricate one from scratch, but that has hurdles as well....
    What material to use? Plastic sheet with a metal frame? Plastic sheet would be expensive and a bit of work to cut to size. I'd then have to seal the edges.....[/QUOTE]
    Most things plastic are more expensive than you think.

    Large HDPE aquarium ponds would work but be prepared to sit down before you check prices.

    I've made a few fume hoods using the following.
    3 or 4 mm Plastic sheet (poly propylene or HDPE pr PVC), cut with WW table saw, heat and bend the sides and edges, fold into box shape, nylon or SS bolt edges to sides, leave front open and cover with acrylic or PC sheet.
    Ideally you'd need a proper plastic heater/bender to bend long sides and edges.
    Silicone all edges.

    Too complicated? painted steel frame, plastic sheet ss screwed to steel, edges sealed with Silicone, will be more fiddly but will work.
    If you did that I would use clear 1mm PC sheet all round - you can get rolls of this at Bunnings.

    Alternative solution.
    Ply box and use a plastic pond liner and PC or acrylic front.
    You might even be able to get away with thick HDPE builders film and seal edges with Silicone.

  3. #3
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    Default

    1000lt shuttles are redily available and fairly cheap, might be a bit on the large side though.
    Cheers,
    Greg.

  4. #4
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    So you have a suitable compressor yet? These things need a very large amount of compressed air.
    I think I saw the same source as you did. https://www.youtube.com/watch?v=mUfgjK5q_Mc. I thought it was pretty interesting too.
    Cheers, Joe
    retired - less energy, more time to contemplate projects and more shed time....

  5. #5
    BobL is online now Member: Blue and white apron brigade
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    Quote Originally Posted by jhovel View Post
    So you have a suitable compressor yet? These things need a very large amount of compressed air.
    I think I saw the same source as you did. https://www.youtube.com/watch?v=mUfgjK5q_Mc. I thought it was pretty interesting too.
    Interesting vid Joe, thanks for the link.
    So its not really "vapour" blasting , it's plain water/abrasive blasting.
    The guy in the vid is flogging a US$69 vid.
    As one of the comments under the vid suggests once the type of pump used is determined most mechanically minded persons should be able to work out how to do the rest.

    The pump needs to stir up the water and abrasive as well as deliver enough water to the height of the height of the spray gun. It doesn't need a lot of pressure as this is provided by the compressed air.

    The suggestions are a 1/4HP submersible is all that is required. For extended use an abrasive resistant pump would be handy but otherwise for occasional use a plastic pump might even be OK?

  6. #6
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    So it is sort of a similar process to the pressure washer blasting setups, except you don't need a compressor or cabinet?

    https://www.ebay.com.au/itm/Industri...b8:rk:108:pf:0


    I saw that youtube video, I can't seem to see $1300 worth of parts in there (that's probably US $$$ as well) unless it is a very expensive pump.

  7. #7
    BobL is online now Member: Blue and white apron brigade
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    Quote Originally Posted by Com_VC View Post
    So it is sort of a similar process to the pressure washer blasting setups, except you don't need a compressor or cabinet?
    Sure provided you don't want to recover your abrasive and don't care if you get wet.
    If you can recover your abrasive you can use better quality stuff like glass beads which gives a really nice finish.

    I saw that youtube video, I can't seem to see $1300 worth of parts in there (that's probably US $$$ as well) unless it is a very expensive pump.
    I agree, commercial level cabinet and he's over engineered it for DIY use and is probably using an industrial slurry pump.

  8. #8
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    Quote Originally Posted by BobL View Post
    Not really - provided its a cylinder or conical and and not egg shaped.
    I use 1mm thick Polycarbonate (PC) because it's very flexible and strong.
    Thanks Bob. Some great ideas there.
    Not keen on a curved window as I may need a windscreen wiper fitted to improve view of the job.

  9. #9
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    Quote Originally Posted by kwijibo99 View Post
    1000lt shuttles are redily available and fairly cheap, might be a bit on the large side though.
    Cheers,
    Greg.
    I thought of those. I can get as many as I want form work, but I think 1000L tanks would be too big.


    Here's a pic of the Clemco cabinet.
    Clemco Blast Cabinet (5).jpg

  10. #10
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    Quote Originally Posted by jhovel View Post
    So you have a suitable compressor yet? These things need a very large amount of compressed air.
    I think I saw the same source as you did. https://www.youtube.com/watch?v=mUfgjK5q_Mc. I thought it was pretty interesting too.

    Yes, I have a 15 CFM compressor and am aware of the air consumption.
    Not convinced 15 CFM will be enough but have to try first.
    I'm a bit resticted with funds and single phase.....

  11. #11
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    Quote Originally Posted by BobL View Post
    Interesting vid Joe, thanks for the link.
    So its not really "vapour" blasting , it's plain water/abrasive blasting.
    The guy in the vid is flogging a US$69 vid.
    As one of the comments under the vid suggests once the type of pump used is determined most mechanically minded persons should be able to work out how to do the rest.

    The pump needs to stir up the water and abrasive as well as deliver enough water to the height of the height of the spray gun. It doesn't need a lot of pressure as this is provided by the compressed air.

    The suggestions are a 1/4HP submersible is all that is required. For extended use an abrasive resistant pump would be handy but otherwise for occasional use a plastic pump might even be OK?
    Yeah 'Vapour' is a bit misleading....lol
    The pump info is a bit scarce but I have found a link to a slurry pump that is supposedly suitable ( no idea of its operational life though....) 50 GPM is a flow that has been mentioned.

  12. #12
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    What about a plastic tub?
    https://www.richmondau.com/product-c...angular-tanks/

    Michael

  13. #13
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    What about using an old fridge/freezer, on its side. The insides are one piece, the door could be used for large pieces, and you'd probably pick one up off the side of the road on Council Clean Up days.
    Kryn
    To grow old is mandatory, growing up is optional.

  14. #14
    BobL is online now Member: Blue and white apron brigade
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    Quote Originally Posted by Sterob View Post
    Thanks Bob. Some great ideas there.
    Not keen on a curved window as I may need a windscreen wiper fitted to improve view of the job.
    Windscreen wipers work on curved windows - just look at your car.
    Depending on the design they will also work on concave surfaces as well.
    But iIf you are going to use a wiper I'd make sure the screen was glass because the plastic will probably scratch too easily.

  15. #15
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    Quote Originally Posted by BobL View Post
    Windscreen wipers work on curved windows - just look at your car.
    Depending on the design they will also work on concave surfaces as well.
    But iIf you are going to use a wiper I'd make sure the screen was glass because the plastic will probably scratch too easily.
    Yeah, glass would be better in that case.

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