# converting 110 v glue gun to 12 volt?

R

#### richg99

Jan 1, 1970
0
I have need of a portable, low-temperature glue gun for model airplane
repair in the field. Any ideas about how I would go about converting a
standard $5.00 or so ( cheap) glue gun to use with my 12 volt auto battery. I know I can put a converter on, but , for a variety of reasons, I'd rather not do that. thanks, Rich G #### GregS Jan 1, 1970 0 I have need of a portable, low-temperature glue gun for model airplane repair in the field. Any ideas about how I would go about converting a standard$5.00 or so ( cheap) glue gun to use with my 12 volt auto battery.
I know I can put a converter on, but , for a variety of reasons, I'd rather
not do that. thanks, Rich

They do sell battery glue guns.

greg

R

#### richg99

Jan 1, 1970
0
Probably just a dumb question..but..if the 110 v unit has a coil of
resistance heating wire..and the aforementioned 12 v unit has a coil of
resistance wire...can I calculate how much of the 110 v wire I would need to
make it heat on 12 v d.c.? i.e. can I cut it shorter..or ....add .....more
of the same wire??

There must be a number and gauge in there someplace?? ...

or...can I put a resistor into the 12 v circuit to make it "look like" the
110 v voltage coming in.. or is that going the wrong way around?

thanks sorry for the dumb questions...but you guys know this stuff..I
don't. Rich

p.s. the 110v gun that I have here is a 40 watt gun...with two choices..low
temp ( which is what I need and use ) and high temp. The glue they sell will
melt at either temperature..

F

#### Fred McKenzie

Jan 1, 1970
0
richg99 said:
Probably just a dumb question..but..if the 110 v unit has a coil of
resistance heating wire..and the aforementioned 12 v unit has a coil of
resistance wire...can I calculate how much of the 110 v wire I would need to
make it heat on 12 v d.c.? i.e. can I cut it shorter..or ....add .....more
of the same wire??

Rich-

If you only cut the wire shorter, you might get the same power on 12
volts. But with ten times the current you would burn out the wire.

Just for discussion, suppose you cut the resistance wire into 10 equal
pieces, reconnected them in parallel and applied 12 volts. The
resulting combination would draw ten times the current at one tenth the
voltage, which equals the original power. In theory it would work, but
in practice, you would need to wind the parallel wires into the original
space without any of the coils touching.

I think your best bet would be to look in the hobby shops for a battery
powered glue gun. If you can't find one, a 50 or 100 watt DC-to-AC
inverter would be fairly small, and they are readily available. The
smaller ones may be built with an integral lighter plug, so an
automotive lighter socket would be needed to use them.

Fred

J

#### Jim Yanik

Jan 1, 1970
0
Probably just a dumb question..but..if the 110 v unit has a coil of
resistance heating wire..and the aforementioned 12 v unit has a coil
of resistance wire...can I calculate how much of the 110 v wire I
would need to make it heat on 12 v d.c.? i.e. can I cut it
shorter..or ....add .....more of the same wire??

There must be a number and gauge in there someplace?? ...

or...can I put a resistor into the 12 v circuit to make it "look like"
the 110 v voltage coming in.. or is that going the wrong way around?

thanks sorry for the dumb questions...but you guys know this stuff..I
don't. Rich

p.s. the 110v gun that I have here is a 40 watt gun...with two
choices..low temp ( which is what I need and use ) and high temp. The
glue they sell will melt at either temperature..

why not just buy the RIGHT TOOL for the job,a 12v glue gun?
Or buy an inverter,and then you will have it for other tools,other
purposes.

(chances are,the 110v heating element is not accessible to be modified.
Besides,if you just take off some of the wire,you lose heating power.A 12V
heating element of the same heating power will draw a much higher
current,and use a heavier gauge wire.)

S

#### Stacey Chuffo

Jan 1, 1970
0
richg99 said:
I have need of a portable, low-temperature glue gun for model airplane
repair in the field. Any ideas about how I would go about converting a
standard $5.00 or so ( cheap) glue gun to use with my 12 volt auto battery. I know I can put a converter on, but , for a variety of reasons, I'd rather not do that. thanks, Rich Just get 9 more car batteries and wire them in series. T #### terry Jan 1, 1970 0 Very few of these things can be stripped to the point where you could replace the heater element, as the low price means they're disposable. And even if you could where would you get the correct part? I suppose you could make the correct element - but buying the materials may prove difficult and costly. I've seen rechargeable ones on sale. They would prove a better basis to run off 12 volts via a regulator. -- *Constipated People Don't Give A Crap* Dave Plowman [email protected] London SW To e-mail, change noise into sound. How much power does it use? That is how many watts? Since it is glue gun it is almost 100% likley to be resistive load. So no motors or fans etc. Soldering irons are similar. Therfore one of those addapters used in cars to run small household appliances from the car battery 'might' do the job? For example our smallest glue gun uses IIRC around 24 watt. So plugged into the 120 volt wall outlrt at home, at home it use 120 volts at 0.2 amps = 24 watts. (120 x 0.2 = 24). So you would need an auto inverter that will supply 24 watts at 120 volts with input from a car battery at 12 volts. Just for the record it will draw a little more than 24 watts from the car battery because of the slight inefficiency of any device. Even if that is say 30 watts, no matter. That's less than 3 amps drain on the car battery; probably about the same as leaving on the parking lamps! (12 x 2.5 = 30 watts). Have seen small inverters in auto parts and big box stores. To run a glue gun inverter does not have to be anything elaborate. Don't try to plug in anything too big to a very small inverter though. Someone here tried plugging in a toaster oven; probably around 1000 watts, into their auto to 110 volt inverter for their low power lap- top that hardly gets very warm (nothing close to 1000 watts!) and then wondered why it would not work!!!!!!!! Good luck. Z #### z Jan 1, 1970 0 I have need of a portable, low-temperature glue gun for model airplane repair in the field. Any ideas about how I would go about converting a standard$5.00 or so ( cheap) glue gun to use with my 12 volt auto battery.
I know I can put a converter on, but , for a variety of reasons, I'd rather
not do that.  thanks, Rich

that just ain't gonna happen. sorry.

G

#### GregS

Jan 1, 1970
0
I have need of a portable, low-temperature glue gun for model airplane
repair in the field. Any ideas about how I would go about converting a
standard \$5.00 or so ( cheap) glue gun to use with my 12 volt auto battery.
I know I can put a converter on, but , for a variety of reasons, I'd rather
not do that. thanks, Rich

As if this isn't cheap enough.....

http://www.fitsmybudget.com/product.php?productid=16985

I could recommend a more expensive butane shrink wrap tool,
but you could also pull out a BIC and flick the stick.

greg

J

#### Jim Yanik

Jan 1, 1970
0
[email protected] (GregS) wrote in
As if this isn't cheap enough.....

http://www.fitsmybudget.com/product.php?productid=16985

I could recommend a more expensive butane shrink wrap tool,
but you could also pull out a BIC and flick the stick.

greg

I think I'd rather use cyanoacrylate instead of hot glue for in-field model
repairs.

of course,if you're using a 12VDC-110VAC converter,then you can also use
it would also be available for emergency use elsewhere.

B

#### Baron

Jan 1, 1970
0
Jim Yanik Inscribed thus:
(chances are,the 110v heating element is not accessible to be
modified.

I would go with Jim ! My glue gun heater just contains a tube of what
looks like carbon with the connecting wires embedded in it. One at each
end. I suspect that its just a big carbon resistor with a hole through
it.

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