Dust/Chip Extractor - could you ?

[toesy]

Box one in?

I have one of the Axminster units below, and use it in my Garage, now my idea is could I, should I box off an area in my garage, make it a little room and then sound deaden it.

Has anyone done something similar and how did you get on, all help and advice even if your telling me I'm mad is very much appreciated.

 

[Yetty]

In my workshop, the woodworking machinery is much louder than the extractor, so there would be little sound deadening benefit of boxing in the extractor. Also, would you need to use a longer flexible extraction hose to reach all the machines, and that would likely result in less suction at the machine.

 

[beech1948]

I have a long narrow workshop - 55ftx14ft - and use 2 Record DX4000. Basically one at each end. Each has a Thein separator and one lives in a soundproof box + stand with the separator below it. I did this to reduce noise as when using 2 motors on each Dx4000 it can get a bit over the top. I will add a sound proof box to the second one when I have an hour to spare. Both are attached to 110mm soil pipe.

The only issue I worried about was cooking the motors. Each one has a remote control so they usually only get used for say 45 minutes max.

Al

 

[wallace]

Them type of extractors move a lot of air compared to vacuum. If you boxed it in how would the air that has been sucked get out of the box. It would need to have filters which would deadon the noise but not stop it. I have mine outside in its own little lean to and it makes a difference plus I don't have to worry about having a fine filter top bag.

 

[beech1948]

Wallace,
I'm not sure if your message was about my post. But I built the sound proof box just like a loudspeaker box. On the back there is a baffle which leads from inside to outside through 2 turns. The baffler is stuffed with a blanket like filler used in loudspeakers which allows air to leave the box but keeps sound in.

Seems to work OK with the original 90 ish decibels now down to about 67. Measured by a friend who works in a specialist sound stage company.

Al

 

[toesy]

Thank you all for the replies.,

I was thinking alongside what Al has said/done and putting in an Bathroom extractor fan to suck in fresh air and then put a hole and build like a chimney over the top (stop rain coming in) then use speaker baffle wool or whatever you call it.

If it got down to 70db I would be well happy./.

 

[chipmunk]

Hi Toesy,
I don't think your idea of an extra fan is required - I think you just need a good straight vent to the outside world for the air passing through the filter sack to leave the box unhindered.

I built a similar box in the corner of my old shed of double skinned plaster-board. You need plenty of mass in the walls to deaden the sound and you need to arrange for the inlet into the box to go through at least a couple of bends to stop the direct audio path from inside to outside.

One of the problems with these extractors is that the bag gets choked if you suck up sanding dust and then you will have to open the box to give it a shake. This can be a real PITA.

Here is the box when I built it...

I eventually completely replaced the upper bag with an upturned bucket with a length of waste pipe going straight outside. This worked well because the heavy stuff still ended up in the bag and the fine dust dispersed outside out of harms way.

I now have a heated workshop and a Camvac whereas the old shed was unheated. So the fact that as soon as the extractor was switched on the shed air was replaced in no time was not an issue.

I did have to cut a vent in the shed door though because there was so much suction without the filter bag, it used to pull the shed door closed and started to pull a vacuum in the shed!

HTH
Jon