Steel has a lousy thermal conductivity compared to Aluminum. They sell the "dippable" electrical tape at most home improvement stores. Foam double-stick tape is indeed amazing stuff...
On Wed, Aug 31, 2011 at 4:05 PM, Robert G. Brown <r...@phy.duke.edu> wrote: > On Wed, 31 Aug 2011, Lux, Jim (337C) wrote: > > Also thin aluminum. You can get aluminum sheeting that you can cut with > scissors and that is easy to bend into shapes if you have a bending jig > (or can make one with two pieces of board stock and a vise). Cheap, > fireproof, meltproof at any temperatures you're likely to reach, no > toxic fumes in a fire, can be glued or screwed. The one drawback is > that it is a PITA to weld or solder if that's important to you, but for > an air shroud you can probably make compression joints (interlocking U > rims, squeezed down) that are adequate. > > Most hardware stores (roof flashing), some auto parts or hobby stores. > Copper too, but more expensive. Don't know about thin "enough" sheet > steel, but probably -- copper or steel would both weld or solder easily. > > rgb > > > Cardboard? Card stock? Masking tape? White glue? (that's what I usually > use for cooling ducts.. easy to cut, glue, tape..) It's no more flammable > than plastic, and it doesn't melt and get soft. Papier Mache, works too. > > > > On the other hand, if you want to mold a smooth curve, then plastic is > the way to go. Vacuforming can make a very nice thing, and the form is made > out of wood (usually), but you don't need to go to that extreme.. you get > some nice thermoplastic, put it in hot water to get it soft, and mold as > needed. (yes, you could use those old LPs you've got stashed away.. ) > > > > Thin, cuttable plastic could be polyethylene (not necessarily High > density) or similar. Polystyrene and acrylic tend to be more brittle. ABS > is very nice to work with. PVC is also easy to work with. Nylon is another > possibility. > > > > Do you want to be able to glue it? > > > > What I would do is call up profesionalplastics.com formerly Cadillac > Plastics (many outlets nationwide) and see what they have. It might be more > useful to find a retail outlet and go look through their scrap bin.. Before > Gem-O-Lite in Woodland Hills went out of business, that's where I used to > go. Plastic Depot in Burbank has a huge selection. > > > > Drive over there, and ask the counter folks what would work for you. > $10-20 will get you more plastic than you know what to do with. > > > > Art supply places (e.g. Blick on Raymond.. any of the countless Michaels > or Aaron Bros) also carry sheet plastic, but I find the plastic places tend > to have more variety, and more practical information about use for > "engineering" applications. > > > > > > Jim Lux > > +1(818)354-2075 > > > >> -----Original Message----- > >> From: beowulf-boun...@beowulf.org [mailto:beowulf-boun...@beowulf.org] > On Behalf Of David Mathog > >> Sent: Wednesday, August 31, 2011 10:29 AM > >> To: beowulf@beowulf.org > >> Subject: [Beowulf] materials for air shroud? > >> > >> Anybody know of a nice cheap, high melting point, easy to work with > >> sheet material, for making a custom air shroud? > >> > >> We have one box with stuff in it that looks similar to HDPE, the > >> material the white flexible cutting boards are made of, but it is a bit > >> thinner and more rigid that that. Unfortunately there are no markings > >> on it, so HDPE is just a guess. Whatever it is, it cut easily with > >> scissors (I had to trim it slightly at one point.) > >> > >> Background. We have an older Supermicro SC-823 server with dual > >> processors. The air shroud it came with only covers the first > >> processor. That didn't matter much when it had two low power processors > >> in it, but after upgrading it to dual Opteron 280s, the uncovered second > >> one runs considerably hotter than the covered front one. (Swapping the > >> processors around didn't help - the heat stayed where it was, so a > >> ventilation issue, not a processor issue.) Supermicro does make a newer > >> shroud which extends to the back of the case, but the manual (google for > >> "SC-823 air shroud user's guide") indicates that it is designed for > >> Intel CPUs. So it may or may not fit around the Opterons. > >> > >> The redesigned air shroud will probably work, but I'm about 90% > >> confident that taping a sheet of plastic onto the back of the existing > >> shroud would work as well - if I can find a plastic that won't flap > >> around or melt. > >> > >> Thanks, > >> > >> David Mathog > >> mat...@caltech.edu > >> Manager, Sequence Analysis Facility, Biology Division, Caltech > >> _______________________________________________ > >> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin > Computing > >> To change your subscription (digest mode or unsubscribe) visit > >> http://www.beowulf.org/mailman/listinfo/beowulf > > _______________________________________________ > > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > > > > Robert G. Brown http://www.phy.duke.edu/~rgb/ > Duke University Dept. of Physics, Box 90305 > Durham, N.C. 27708-0305 > Phone: 1-919-660-2567 Fax: 919-660-2525 email:r...@phy.duke.edu > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > -- - - - - - - - - - - - - - - - - - - - - - Nathan Moore Associate Professor, Physics Winona State University - - - - - - - - - - - - - - - - - - - - -
_______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
