Moldable Iron Powder
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From: Jon Kirwan on 29 Nov 2009 19:06 On Mon, 23 Nov 2009 16:18:04 -0600, Tim Wescott <tim(a)seemywebsite.com> wrote: >On Mon, 23 Nov 2009 14:52:16 -0500, jeff wrote: > >> Hi Tim, >> There are a lot of iron filled epoxies out there. Two names that come to >> mind immediately are Moglice and Devcon. I recall Dave Trumper at MIT >> had a nice mag-lev demo that used a photocell as feedback. > >Thanks Jeff. That gave me the keywords I needed. > >Goodness but it's expensive stuff, at least from McMaster. Gotta think >about this again, maybe. Might try picking these up, too: http://dspace.mit.edu/bitstream/handle/1721.1/13582/24130470.pdf?sequence=1 http://dspace.mit.edu/bitstream/handle/1721.1/29730/54039899.pdf?sequence=1 PDF files worth reading. (Found them using David's name, above.) Jon
From: Bill McKee on 30 Nov 2009 00:20 "Jon Kirwan" <jonk(a)infinitefactors.org> wrote in message news:8036h5lo6s9o5mo69j86qok1h1np9v3gc1(a)4ax.com... > On Mon, 23 Nov 2009 16:18:04 -0600, Tim Wescott <tim(a)seemywebsite.com> > wrote: > >>On Mon, 23 Nov 2009 14:52:16 -0500, jeff wrote: >> >>> Hi Tim, >>> There are a lot of iron filled epoxies out there. Two names that come to >>> mind immediately are Moglice and Devcon. I recall Dave Trumper at MIT >>> had a nice mag-lev demo that used a photocell as feedback. >> >>Thanks Jeff. That gave me the keywords I needed. >> >>Goodness but it's expensive stuff, at least from McMaster. Gotta think >>about this again, maybe. > > Might try picking these up, too: > > http://dspace.mit.edu/bitstream/handle/1721.1/13582/24130470.pdf?sequence=1 > http://dspace.mit.edu/bitstream/handle/1721.1/29730/54039899.pdf?sequence=1 > > PDF files worth reading. (Found them using David's name, above.) > > Jon Look for sintered metal in a magnetic material. I think some magnets are made with sintered iron.
From: Gunner Asch on 30 Nov 2009 06:56 On Sun, 29 Nov 2009 16:06:49 -0800, Jon Kirwan <jonk(a)infinitefactors.org> wrote: >On Mon, 23 Nov 2009 16:18:04 -0600, Tim Wescott <tim(a)seemywebsite.com> >wrote: > >>On Mon, 23 Nov 2009 14:52:16 -0500, jeff wrote: >> >>> Hi Tim, >>> There are a lot of iron filled epoxies out there. Two names that come to >>> mind immediately are Moglice and Devcon. I recall Dave Trumper at MIT >>> had a nice mag-lev demo that used a photocell as feedback. >> >>Thanks Jeff. That gave me the keywords I needed. >> >>Goodness but it's expensive stuff, at least from McMaster. Gotta think >>about this again, maybe. > >Might try picking these up, too: > >http://dspace.mit.edu/bitstream/handle/1721.1/13582/24130470.pdf?sequence=1 >http://dspace.mit.edu/bitstream/handle/1721.1/29730/54039899.pdf?sequence=1 > >PDF files worth reading. (Found them using David's name, above.) > >Jon I wish this had come up 5 months ago, when I was taking down Ceromet/MPP in Anaheim, California. I could have gotten you guys a few thousand pounds of iron powder for free. http://metalpowderproducts.com/ If you want a few pounds..maybe I can get it from another company if I ask nice and they want a service call..... http://www.capstan.cc/locs-cal.htm Gunner "Aren't cats Libertarian? They just want to be left alone. I think our dog is a Democrat, as he is always looking for a handout" Unknown Usnet Poster Heh, heh, I'm pretty sure my dog is a liberal - he has no balls. Keyton
From: Richard the Dreaded Libertarian on 1 Dec 2009 12:53 On Mon, 30 Nov 2009 22:09:40 -0800, Gunner Asch wrote: > On Mon, 30 Nov 2009 09:48:19 -0800, Richard the Dreaded Libertarian [Cats are liberals] > Ill have to change that sig..you make sense. > > Gunner > > "Aren't cats Libertarian? They just want to be left alone. I think our dog Um, better hurry up! ;-) Cheers! Rich
From: Wild_Bill on 2 Dec 2009 14:19
I dunno about the ability to meet your requirements, but there are iron powders available for various uses, from toys (Etch-A-Sketch), to industrial uses.. electromagnetic clutches/brakes for machines. These examples are moderately coarse powders. Very fine iron/steel particles are a byproduct of etching/cleaning or pickling steel products in manufacturing. The steel parts are pickled in various acids, and the particles which are suspended in the liquids are then filtered to remove the particles from the acids. The result is a mud/clay-like material that is used to manufacture other products, including iron composition cores for certain magnetic properties. I don't have any sources to recommend. -- WB .......... metalworking projects www.kwagmire.com/metal_proj.html "Tim Wescott" <tim(a)seemywebsite.com> wrote in message news:hbmdnfVvIcn3SpfWnZ2dnUVZ_hj_fwAA(a)web-ster.com... >A long-term back-burner project just got my attention when I found out > that Home Depot sells magnetic paint. > > The project is a levitating globe thingie, designed as a control systems > trainer that lets the student program the control rules in C and see how > different control strategies lead to different sorts of system > performance. > > The paint got me thinking -- if they can make latex paint with iron > powder in it, can I buy some sort of plastic resin with iron powder in it > and make my own custom magnetics on the cheap? > > So: does anyone know of an iron-powder/epoxy (or whatever) mix out there > that you can buy, or an iron powder material that you can mix with your > own resin to mold soft magnetic materials out of? > > I'm looking to build some cores, and maybe have some made at a low volume > if the prototypes work. I do _not_ need super high permeability -- the > air gap in this is so big that according to the FEA program I'm using > there's not much difference between core material with a relative > permeability in the hundreds vs. iron (with relative permeability in the > thousands). > > Thanks. > > -- > www.wescottdesign.com |