OT - Soundproofing a rock tumbler...

[Jake]

I have been asked to investigate the possibility of significantly reducing
the sound of a rock tumbler in operation. Bought (not by me) as a gift for
a younger member of the family and is now using it noisily and
enthusiastically.

The canister itself is approximately the size of a 2 litre soda bottle cut
in half and this sits in the device, and is driven by a rubber wheel which
rotates against the canister.

One box inside another with sound insulating material to fill the space?

[geoff]

In message <oICdnQfjh6oaDAjN...@giganews.com>, Jake
<Ja...@jakesplaice.com> writes

Put it in the shed


--
geoff

[Adrian Brentnall]

My family & I used to run half a dozen large tumblers commercially in
the 1970's (both commercial and home-made units).

You'll never silence them completely, and you need to make sure that the
motors can get a good supply of air to prevent them overheating
- so boxing them in is a recipe for disaster / fire hazard.

Ours 'lived' in the old coal-shed, sitting on several layers of old foam
carpet to reduce transmitted sound - but you could still hear them at
the other end of the (150ft) back garden, if you listened for them. Have
you got an outside shed / garage etc with mains?

Our tumbler drums were lined with rubber (could retro-fit old inner tube
or carpet underlay, maybe ?). It's the stones rubbing against each other
that causes the noise, but this action also turns them from rough rocks
into rounded pebbles. The amount of water in the drum is also important
- insufficient water = more noise.

Hope this helps
Adrian

[Nick Odell]

Very good idea that.

If that's not possible for some reason I think the first step is to
break the acoustic coupling between the device and anything else. A
rubber bench mat like this -
http://www.wiltsgrove.co.uk/images/thumbnail/RUBBER-MAT.jpg

or this -

http://www.jewelerssupplies.com/media/130364.jpg

placed under the device will help. Soft rubber is better than hardened
rubber.

A non-specific car footwell mat or a spare carpet sample might be some
use. It's easier to get hold of but usually doesn't work as well as a
purpose made bench mat.

Nick

[Brian Gaff]

Put it in the garage.

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email: bri...@blueyonder.co.uk
______________________________________________________________________________________________________________


"Jake" <Ja...@jakesplaice.com> wrote in message
news:oICdnQfjh6oaDAjN...@giganews.com...

[Martin Brown]

The stuff sold for soundproofing PCs ought to do it.
Acousticpack or similar

http://www.acousticpc.com/quiet_computer_case_insulation.html

Check if the motor needs ventilation.

BTW it may set like concrete if you don't keep the tumbler tumbling.

--
Regards,
Martin Brown

[The Natural Philosopher]

tow ply boxes sand filled gap and hermetic sealing.

--
Ineptocracy

(in-ep-toc’-ra-cy) – a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

[Andy Dingley]

On Saturday, 3 November 2012 21:49:59 UTC, Jake wrote:
> One box inside another with sound insulating material to fill the space?

Just one box, made of heavy stuff (3/4" OSB or chipboard is good). You can line the inside with rockwool if you have it, and for neatness you could sheath the inside of that with light hardboard.

Even better is to make a base too out of heavy OSB or ply, and to mount the tumbler on that with some light springy suspension (even lumps of expanded polystyrene). This reduces the vibration through the feet. Many tumblers are fairly quiet on their own (depending upon size of the cartridge cases), but they transmit a lot of vibration into a table they're sitting on.

[Onetap]

Only run it during daylight hours if it bothers the neighbours. There is little background noise at night and noises that are hardly noticeable during working hours sound deafening at night.

[Jules Richardson]

On Sat, 03 Nov 2012 21:49:49 +0000, Jake wrote:

> I have been asked to investigate the possibility of significantly
> reducing the sound of a rock tumbler in operation. Bought (not by me)
> as a gift for a younger member of the family and is now using it noisily
> and enthusiastically.

Buy a second one and run it 180 degrees out of phase with the first, so
that the noise cancels out.

[Bill]

In message <XBqls.2790$TD5...@newsfe01.iad>, Martin Brown
<|||newspam|||@nezumi.demon.co.uk> writes

>The stuff sold for soundproofing PCs ought to do it.
>Acousticpack or similar
>
>http://www.acousticpc.com/quiet_computer_case_insulation.html
>
>Check if the motor needs ventilation.
>
>BTW it may set like concrete if you don't keep the tumbler tumbling.

I can quote from experience, having built a prototype PC enclosure using
plywood lined with the similar material used for sound insulation on
boat engines.

I built an oblong sort of chimney, with constructions top and bottom
that gave a convoluted path for the air intake and exit.

Taking the top one off allowed the front panel to be removed for access.
After fitting an angled baffle inside to help the fan output point
upwards, the temperatures inside the PC were lower than without the
soundproof box, and the audio noise level outside the PC was massively
lower measured on Cool Edit running on the PC.

The boat insulation was the all plastic membrane on a foam base as
opposed to the more expensive lead on foam type. I bought offcuts from a
boat jumble.
The whole unit was baffle base then chimney containing the PC, then
baffle air outlet. The base and outlet would have probably benefited
from lining with Rockwool, or similar.

It worked extremely well, though I say it myself. I never built a
production model because we found quieter PC's but I now know that the
principle works well.

I understand the idea of sand filled cavities, but I think the membrane
attached to foam is a better wide range absorber.
--
Bill

[jeffpas...@gmail.com]

Hi. My wife complains whenever i clean my brass in a vibrating brass cleaner u know with corn media. Any ways i just turned my plastic bin upside and placed it over it. Cut the droning noise of it down alot. No more complaints. Ive just built a rotarty rock tumbler for my kid. Made sure i put a second idler shaft so i could run multiple drums side by side😁 and was thinking i would probably get a rectangle plastic storage tub and turn upside down over the barrels. But my motor is under neath in the open mounted on the frame so wont have to worry about heat

[Brian Gaff (Sofa 2)]

Why do you want to tumble rocks?
Brian

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This newsgroup posting comes to you directly from...
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<jeffpas...@gmail.com> wrote in message
news:dfdf2e95-89c7-4580...@googlegroups.com...

Hi. My wife complains whenever i clean my brass in a vibrating brass cleaner
u know with corn media. Any ways i just turned my plastic bin upside and
placed it over it. Cut the droning noise of it down alot. No more
complaints. Ive just built a rotarty rock tumbler for my kid. Made sure i

put a second idler shaft so i could run multiple drums side by side?? and

[Rod Speed]

Brian Gaff (Sofa 2) <bri...@blueyonder.co.uk> wrote

> Why do you want to tumble rocks?

To make them nice and round.

The neighbours little girls used to paint small round
pebbles and sell them to me for peanuts. Now that she
now has her own little kids, we still smirk about that.

[ss]

On 27/02/2020 15:08, Brian Gaff (Sofa 2) wrote:
> Why do you want to tumble rocks?
> Brian
>

To polish them?

[Peeler]

On Fri, 28 Feb 2020 02:36:26 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

<FLUSH senile asshole's trollshit>

02:36!!! And you've been up and trolling for OVER AN HOUR, ALREADY! So, why
do you REFUSE to swallow your Nembutal, you senile pest? You are an
absolutely USELESS idiot ...an 86-year-old TROLL!!!!

--
Bod addressing abnormal senile quarreller Rot:
"Do you practice arguing with yourself in an empty room?"
MID: <g4ihla...@mid.individual.net>