Science help! Any body know any heat resistant objects that can me found at home or bought at a low price?
Well for a project in Geometry we are supposed to be making a T.P.S model. Its a wooden dowel and a nail glued to the end. When we place to nail up to a touch blower it takes about 33 seconds to melt the glue and the nail to fall off. Our job is to build a outer shell to slow down the process of the heat reaching the nail and melting the glue. The nail is about 4 inches long and you cant touch the wooden dowel or glue anything to the TPS. What materials could I use that are heat resistant to keep the nail from melting the glue without going over the budget?
- rogerLv 79 years agoFavourite answer
a piece of steel water pipe around the dowel will work.
If you REALLY want to slow down the heating then use TWO pipes -- one inside the other with about 1/4 inch between the pipes.
Another cheap way is to get a piece of 2" water pipe and put inside it a toilet paper or paper towel tube that has been wrapped with aluminium foil. -- should make a good heat shield.Source(s): Engineering degree
- EckoLv 79 years ago
It seems you want a heat shield that is a good thermal insulator. Touch blower? Is that something like a hair dryer, or the hand dryers found in toilets? The temperature from these should be well below 100C so they don't burn skin.
A heat shield needs to use a good thermal insulator. This is a material with low thermal conductivity (high thermal resistance). This is measured in watts/meter * degrees K. Heat flow is watts, so that is the heat flow in watts that raises the temperature by one degree after travelling through one meter of the material. The first link below shows a list of materials so you can get an idea. Note the conductivity axis scale is logarithmic. Aero-gel is almost magical as an insulator, while diamond "resists heat = not easily damaged by heat" but is very conductive (transmits heat very well). Water, ice, glass, soil, bricks are not very good insulators or conductors, while some woods and fibers are good insulators (because of the air gaps in them I think).
One approach is to use two sheets of some material with air between, just like double glaze windows. The sheet close to the heat source has to operate at a high temperature in this case, so that is one consideration. It doesn't have to be a great insulator. If it conducts heat well away from the stuff you want to shield that could help in fact. The air gap between the sheets should be vertical so cooler air can rise up between the sheets as it warms, carrying heat away. The sheets are best if they are reflective for heat. Mirrors for heat are generally polished metals or silvery rather than dark coloured. If two sheets are not enough, then more sheets with air gaps can be used. The space between the sheets should be reasonably wide, like 1cm or more if possible.
Some insulator materials that can be between the two sheets (other than air) might be the normal insulators used in housing insulation like glass wool, rock wool or sheep's wool. The sheet near the shielded object can be wood or ply or maybe some plastic. The one near the heat source can be glass, porcelain or ceramic, or some sort of building board (wall board, drywall, gyproc) using cement or plaster(gypsum plaster board without the paper on one side), and maybe wood (if it doesn't get too hot).
The shield can be L shaped with the angle pointed towards the heat source so it deflects the hot air either side of the object. A metal angle strip or long screws would suit the butt joint at right angles. A flat panel might do if large enough. Note that RTV (Silastic) is a suitable adhesive for high temperatures with some materials like glass and aluminium angle..
The second link has details about thermal conductivity. The third link is about isulation materials used in houses, and the R rating system (with tables of materials). Increasing values of R are better insulation. After reading this you may find floor/wall tiles (ceramic, cork etc), and ceiling tiles (batts) that are suitable materials. There may be some leftover around your house, or ask at a building site for a few left-overs.Source(s): http://upload.wikimedia.org/wikipedia/commons/1/1e... http://en.wikipedia.org/wiki/Thermal_conductivity http://www.sustainability.vic.gov.au/resources/doc...
- tuesdayLv 79 years ago
ok..not talking about those regular,
garden-variety Oven Mits,
but those really REALLY thick kind,
that are manufactured to be flame/fire resistant.
They may even be sold and packaged as "Flame/Fire IMPERVIOUS)..
If you have a Cooking supply store near-by,or even a Hardware Store
(they'll sell Bar-BQ grills,
as well as those huge,
If you put one mit on the end of the nail/dowel end,
the grilling mit will definatley slow down the melting process.
Too bad you cant borrow Fire-fighter boot,
or one glove..because that's all you'd really need!
what if you just bought a great big bag of fluffy marshmallows,
strung them through wire,
and wrapped about 50 of them over the dowel/nail..
it would have to slow down the meltage a teensy bit,
lots of oozy,
it would smell good,
and you could always pop out some Chocolate and Graham crackers so everyone can have a delightful S'more treat..!
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- ArgentLv 79 years ago
You might try a ceramic ashtray or soap dish. For safety, first check to see if the item will withstand the asymmetric heating that you will apply to it: put it in a box, apply heat, and make sure it doesn't shatter. Use eye and hand protection when doing this.
- Anonymous9 years ago
well sir the normal cork of a wine bottle doesnt conduct heat
u can even use ceramic as the other told
all da best