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« on: April 15, 2018, 09:18:11 PM »
knvshrm
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Hi guys when I use hot glue it melts the depron foam. What to do ?? Plz help guys.
Regards
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« Reply #1 on: April 15, 2018, 09:32:16 PM »
K K Iyer
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Check if the tip of the gun is touching the depron...
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« Reply #2 on: April 15, 2018, 09:42:03 PM »
knvshrm
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No sir the glue itself melts the depron.
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« Reply #3 on: April 15, 2018, 09:47:25 PM »
knvshrm
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The depron is 5mm depron.
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« Reply #4 on: April 15, 2018, 09:48:40 PM »
knvshrm
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I think once the gun heats up I should cut the power supply and then use the gun . Will that be fine ??
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« Reply #5 on: April 15, 2018, 09:51:57 PM »
prabal276
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What is the wattage?
Seems to be too high!
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« Reply #6 on: April 15, 2018, 09:54:53 PM »
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The wattage is 80 W.
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« Reply #7 on: April 15, 2018, 09:59:04 PM »
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Which glue do you use while working with depron? If hot glue what's the wattage of your gun ?
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« Reply #8 on: April 15, 2018, 10:02:48 PM »
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I used my 40W glue gun on depron.
I don't work with depron anymore.
To me, 80w seems to high.
Anyone, correct me if I am wrong.
Once my 40w glue gun leaked on my hand, I got blisters full of pus and second degree burns.
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« Reply #9 on: April 15, 2018, 10:04:40 PM »
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Oh...
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« Reply #10 on: April 15, 2018, 10:22:35 PM »
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Just checked my gun.
Itís 40 watts.
Meanwhile try some different glue stick. Some are transparent, others are white. About Rs 10-15 each.
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« Reply #11 on: April 15, 2018, 10:34:17 PM »
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Ok sir.
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« Reply #12 on: April 15, 2018, 10:39:40 PM »
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@ K K Iyer
Sir,
I don't think it's the glue stick to blame.
It's the wattage that's to be blamed.
@ knvshrm
Are you sure it's depron and not any other type of foam?
Maybe the foam's at fault.
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« Reply #13 on: April 15, 2018, 10:41:54 PM »
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It's depron/biofoam.
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« Reply #14 on: April 15, 2018, 10:51:43 PM »
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My reason for saying that wattage is at fault is as follows:
I tried to build a plane from thermocole 2-3 years back. The thermocole melted with my 40w hot glue gun.
It was however okay when the gun had been switched off for 10-20 seconds.
Maybe the same goes for depron.
It can handle 40-50 watts but not 80watts.
Regards
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« Reply #15 on: April 15, 2018, 11:31:21 PM »
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Ok will cut the power supply after it's heated and try ...thanks buddy.
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« Reply #16 on: April 15, 2018, 11:32:21 PM »
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You could try epoxy. Its a good alternative. Plus, its stronger than hot glue. I use Araldite.
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« Reply #17 on: April 16, 2018, 06:10:09 AM »
knvshrm
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Yup...but it takes time to set too.
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« Reply #18 on: April 16, 2018, 06:53:31 AM »
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Best solution is to Use 5min epoxy.
Example:  http://www.resinova.com/index.php/products/construction-chemicals/149-bondtite-fast-clear

You can also use CA glue but you have to cover the depron with tape or polyurethane coat.
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« Reply #19 on: April 16, 2018, 06:56:24 AM »
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@ knvshrm has to build a whole plane! Not attach parts to it. Grin
Epoxy is expensive!
Epoxy make the joint brittle. No scope for flexing during a crash. So your whole plane is gone.
And finally, to conclude, Epoxy is higher density. You use extra weight to make the same joint. About 5 grams go extra per tube of epoxy as compared to hot glue sticks [1 glue stick= 8gms while 1 pack of epoxy=13 GM's] while you use almost the same volume
« Last Edit: April 16, 2018, 07:13:34 AM by prabal276 » Logged

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« Reply #20 on: April 16, 2018, 07:07:26 AM »
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Yes, epoxy is very expensive. I spent more than 250₹ on my first plane just for epoxy. I didn't even use epoxy that much but it's very expensive. I ended up crashing that plane because it was very poorly built and my skills were close to non-existent. Do yourself a favour and avoid epoxy. Shut down your gun for 10-20 seconds and use. You'll face no problems. Usually, guns that powerful have a variable temperature setting.

Nitesh
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« Reply #21 on: April 16, 2018, 07:08:33 AM »
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I was busy making modifications to my post. You posted the same thing in between. So I made more modifications  Grin Grin Grin
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