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Thread: portable flexable strip 12 volt heater

  1. #1 portable flexable strip 12 volt heater 
    hym
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    What I discuss may call for a new invention, I really don't know much about making portable 12 volt heaters. I need a 1 inch strip of flexable metal about 20 inches long to heat up above freezing. Does anyone know how to do this. This 1 inch metal is very thin.


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  3. #2  
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    Does it have to be 12 volt? It is easy to find heat tape made to prevent pipes from freezing, but it's generally made for 120 volt ac. If necessary, I suppose you could power it from an inverter.

    You will probably have to insulate your metal strip. Is that possible?


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  4. #3  
    hym
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    Thanks for the quick answer. Yes, it has to be bare metal, and heat tape will not work. I tried to hook it up to the (I guess?) positive-neg sides of my rearwindow defogger. It blew the fuse. Do you know the materal that they conduct electricity to heat that rear window? My application is worth it, but it must be inexpensive and the edge of the (metal-I am using brass) must be above 32F. The top of the metal takes a rubber cover, but it is non incasing, leaving the edge bare. A converter to AC cost to much.
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  5. #4  
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    You can gat an inverter for $30. How much did you want to spend?
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  6. #5  
    hym
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    I know you are thinking (still) about this. I thought this morning that I could buy some junk nichrome wire, from toasters or hair dryers etc., and fire it to 1450F to create my metal strip. I have a kiln that can fire to 2300F. I don't mind doing this, but after that I don't know how to regulate the voltage and or amps to cause my result. Besides, how much is that going to cost me and is it feasable, ... would I have enough juice to heat it. If AC power can heat a metal strip and not insulated wire on top of the strip, I would consider this option. Do they sing hyms anywhere but church?
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  7. #6  
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    I don't get what you are saying. What would be the purpose of firing a nichrome wire to 1450F?

    If you want to make a heater out of nichrome wire, you contol the amount of heat by the length and wire gauge or the nichrome. The insulated wire connecting to your nichrome heater would have to have high temperature insulation.

    What is this metal strip for? If somebody knew what you were trying to accomplish, they may be able to help.
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  8. #7  
    hym
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    Thanks, I am pretty sure that I have it figured out. The application for the strip has to do with a non-provisional patent I got, and if I mention it here, I will give up my privacy. Almost everything I do is custom. Again, thanks, and if I sell it you will know what it is for. Funny, only 2 percent of patents are ever sold.
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  9. #8 Re: portable flexable strip 12 volt heater 
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    Quote Originally Posted by hym
    What I discuss may call for a new invention, I really don't know much about making portable 12 volt heaters. I need a 1 inch strip of flexable metal about 20 inches long to heat up above freezing. Does anyone know how to do this. This 1 inch metal is very thin.
    The silicon heaters can be used up to 500 degrees Fahrenheit.


    http://www.watlow.com/literature/spe...colflx0507.pdf
    http://www.watlow.com/products/heaters/ht_flex.cfm

    You will have to order the heater through a distributor. I use Hilton Sales here in Lindenhurst near me but they have distributors all over.

    But they may have some heaters in stock, that will fit your watt per square inch needs and work on 12 volts. They have awesome formulas for calculating what type of heater you need. They calculate in everything. Weight of the container, or object separating the heater from the material to be heated. They can figure out exactly how long it will take to heat up. Based on standard heating and cooling principles.

    Sincerely,


    William McCormick
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