Vibratory machines for milling
#16
Posted 16 November 2008 - 10:59 PM
#17
Posted 16 November 2008 - 11:10 PM
Keep mannequins and watermelons away from fireworks..they always get hurt..
#18
Posted 16 November 2008 - 11:24 PM
#19
Posted 16 November 2008 - 11:35 PM
Seriously though.....read up as much as you can prior to testing anything like this.........And even after that.....test small amounts to begin with.
I'd hate to hear of an accident arising from this !
#20
Posted 17 November 2008 - 07:14 AM
Weigh the contents of the powder, media, container, and note container size, tape up the lid of the jar as well (duct tape), also measure length of test, but don`t return to examin the jar until for 10 minutes or so after it stops vibrating.
Its a shame we do not have access to some professional lab equipment (I would like to see an infra red camera in action to detect any possible heat from the vibration).
good luck and be safe!
#21
Posted 17 November 2008 - 08:17 AM
Before trying this I used to use a motor and pestle to make all my black powder spending at least 3 days on making it, 1 hour preparation with 1 and a half days of grinding and then corning. It is hard work but kinda makes me feel like I have added more time and effort in its making. But now this will make grinding individual chemicals so much easier and hopefully I will be able to make small batches of BP.
#22
Posted 17 November 2008 - 07:23 PM
Also consider getting an ASDA blender. Their "jug over motor" blender was less than £10 recently, The spinning blades reduce most things to dust, in fact to an interesting mixture of particle sizes. Sometimes airfloat isn't what you want.
Keep mannequins and watermelons away from fireworks..they always get hurt..
#23
Posted 17 November 2008 - 07:58 PM
#24
Posted 17 November 2008 - 08:06 PM
Keep mannequins and watermelons away from fireworks..they always get hurt..
#25
Posted 18 November 2008 - 04:08 PM
I fixed a 500g margarine tub on the vibrating plate with a strip of gaffa tape held in place by the clamps that would usually hold the sandpaper.
I put in some fairly coarse KNO3 powder and some ceramic baking beads used in cooking. (A bit bigger than a large pea). I put about 1/3 of media in the tub and KNO3 up to the level of the top of the media.
5 minutes produced a mixed grade powder where about half was fairly fine but not airfloat. I swapped the media for 20 x 2p pieces and another 5 mins reduced almost all of the powder to quite fine. Fine enough to pass a very fine tea strainer.
I think this method will produce a fairly high percentage of fine powder although more experimentation is needed. If you feel the powder, you can feel very small grains, so it is not as fine as talc but I think it will produce a higher percentage of fine powder per batch than a coffee grinder, but will take a bit longer than a coffee grinder.
It is not far from talc though so a very short time in a ball mill would complete the job I reckon.
More experiments required. If anyone wants a go be my guest. I held the sander and have that funny hand feeling, so some sort of clamping system is a must for prolonged use.
This was only an experiment and 2p pieces are steel so do NOT use them for actual chemicals you will use in a mix. This was to test the principle only.
Edited by Mortartube, 18 November 2008 - 04:10 PM.
#26
Posted 18 November 2008 - 05:23 PM
I think your right as to the clamping thing.
#27
Posted 19 November 2008 - 12:24 AM
I Find weighing the container down from the top helps as it makes the vibrations much more violent. Without extra added weight the vibrations are to weak taking longer to get a good even particle size. The rock salt method I listed above was done by securing the container to the vibration plate but when weighed I got a much finer powder within 5 minutes than what I did before hand. Coarse KNO3 is also ground to talk within 5 minutes with no feel of uneven particle sizes passing a fine tea strainer with ease.
My next tests will involve lead media being used with 5 g of dampened black powder on a speed setting of 1 for 15 minutes. The black powder will simply be misted with the amount of water normally used to produce pumped glitter stars.
P.S Mortartube try adding weight to your container and make sure your device is on a surface that wont soak up the vibrations removing it from your milling jar and contents.
Edited by pyrotechnist, 19 November 2008 - 12:25 AM.
#28
Posted 19 November 2008 - 12:56 PM
I think the vibrartory process has some merit and will be useful.
#29
Posted 19 November 2008 - 01:55 PM
#30
Posted 19 November 2008 - 07:57 PM
Keep mannequins and watermelons away from fireworks..they always get hurt..
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