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  1. #1
    Join Date
    May 2003
    Location
    Central Coast, NSW
    Posts
    3,330

    Default More on emptying your dust extractor

    I wanted to return to the subject of how do you empty your dust extractor but as my previous thread on the subject seems to have gone in another direction I am restarting the subject here in this thread.

    Answers to the question posed in my previous thread indicate that the way I was doing it (ie shaking the dust down, letting it settle then gently easing off the lower bag, all the while wearing a respirator) is pretty much all there is. No secrets to be discovered. This has led me to wonder whether a simple rebuild of the dust extractor might be the solution. See, most of us seem to use a plastic bag as the lower bag on our dust extractors, in my case paired with a pleated filter on top. Clearly, though, the manner in which the lower bag is fixed and removed is a hang-over from the days when lower bags were always cloth bags, and having any sort of dust extraction was a wonderful thing and you didnt get too picky about how well it worked. So if we got rid of that hangover from the past, and were free to design something from scratch, what would we come up with. I've been thinking about this for a while but, typically, no brilliant ideas as yet.

    I have two reasons for wanting to do this:
    1. to make emptying the bag cleaner - ie to remove that little bit of escape-dust that seems to result no matter how careful you are.
    2. to make it easier. I figure the easier it is to empty the extractor, the more frequently I'll do it, and therefore the smaller will be the bags of waste - to the point where I can get them into our normal (small) council-approved garbage bin.

    Currently I"m thinking along the lines of having an inner cloth shute, which hangs down from the inverted cone in the metal bag assembly, which I can somehow close off before removing the lower bag, and then open again after the bag is fitted. I'm also thinking of getting a second council-approved wheelie bin, putting bin liners in it, and alternating it as the real garbage bin when its full so you never need to actually lift the bag out - just wheel it out and it becomes the household garbage bin, wheeling the other one in and it becomes part of the dc till next time. Good perhaps, but not good enough.

    So, any ideas on how to redesign the bottom bag/container on a 2-bag dust extractor so it can be emptied in a quick and painless manner?

    cheers
    Arron
    Apologies for unnoticed autocomplete errors.

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  3. #2
    Join Date
    May 2010
    Location
    Not far enough away from Melbourne
    Posts
    4,205

    Default

    Quote Originally Posted by Arron View Post
    I wanted to return to the subject of how do you empty your dust extractor but as my previous thread on the subject seems to have gone in another direction I am restarting the subject here in this thread.

    Answers to the question posed in my previous thread indicate that the way I was doing it (ie shaking the dust down, letting it settle then gently easing off the lower bag, all the while wearing a respirator) is pretty much all there is.
    Hi Aaron,

    Firstly my apologies for my part in the hijack of your original thread on this subject. It may not have given you the answer you sought but a lot of good information came out anyway, which is good to have recorded in this wonderful bank of knowledge.

    Anyway to address your problem, I think that your council bin idea has a lot of merit if one issue can be resolved. It needs to be sealed in an airtight way to the metal ring of the dusty so that all the air still goes out through the felt or pleated filter.

    Since this requires creating an interface between a circle and a squarish opening, it may be easier instead to make a solid container for this purpose.

    THere may be other ideas but I will start off by suggesting a square MDF or ply box the right height to sit under the ring, with a circular hole of the right diameter with some sort of sponge rubber gasket to seal the gap between the metal ring and the box. A plywood ring around the metal ring would probably help to make a better seal.

    How's that for a start? (and I didnt mention the C word so we might just stay on topic.)

    Doug

  4. #3
    Join Date
    Aug 2004
    Location
    Brisbane
    Posts
    5,003

    Default

    who you calling a moron?

  5. #4
    Join Date
    Aug 2010
    Location
    ACT
    Age
    84
    Posts
    2,580

    Default

    Personally I would say any thing that dose away with having to wrestle that metal strap that holds the bags on would be a move in the right direction.
    Regards
    Hugh

    Enough is enough, more than enough is too much.

  6. #5
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,813

    Default

    Quote Originally Posted by A Duke View Post
    Personally I would say any thing that dose away with having to wrestle that metal strap that holds the bags on would be a move in the right direction.
    Regards
    I agree that metal strap thing is a PITA. My dc uses a large plastic ring that you fold the edge of the plastic bags over and then you partially collapse the ring in on itself and insert the folded bag and ring into the DC opening and force the plastic ring to snap bak to full size. It works very effectively and while not exactly easy it is better than the metal clippy strap method.

    For the top bag the plastic ring is sewn into the rim of the bag and that is even easier to take off and refit.

    If a filter is used on the top half maybe omething like a big blast gate could be employed to lock off the filter so the bottom bag could be emptied?

  7. #6
    Join Date
    Nov 2006
    Location
    Rockhampton
    Age
    62
    Posts
    2,236

    Default

    Here's a pic of my collection box
    chips collection box.JPGAttachment 221003

    The second one shows the hole that everything falls thru, I have lined the inside of the box since I took these pics so it makes it easier to clean out, it also allows me to form a seal up against the underside of the box, I do this when I want to collect dust from manmade boards/glue/paint off reclaimed boards or other undesirable stuff that I won't put on the garden, this goes in the bin to the tip, to get it there I have a 25 litre steel bin that I put a liner in, I then put a ~50mm thick bit of foam around the top of the bin capturing the liner, I put the bin in the box with the foam forced up against the underside of the box, when I'm finished I take the bin out (hopefully I haven't gone over the top) and then take the liner out with chips/paint, tie a knot in the bag and straight into the bin, nice and clean, only time it goes bad is if I fill it over the top of the 25 L bin which then spills out into the box which I then clean up and put into another liner/bin.

    Might be a clue here in this process


    Pete

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