RC India

General Topics => Beginners Zone => Topic started by: knvshrm on April 15, 2018, 09:18:11 PM



Title: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 09:18:11 PM
Hi guys when I use hot glue it melts the depron foam. What to do ?? Plz help guys.
Regards


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: K K Iyer on April 15, 2018, 09:32:16 PM
Check if the tip of the gun is touching the depron...


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 09:42:03 PM
No sir the glue itself melts the depron.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 09:47:25 PM
The depron is 5mm depron.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 09:48:40 PM
I think once the gun heats up I should cut the power supply and then use the gun . Will that be fine ??


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: prabal276 on April 15, 2018, 09:51:57 PM
What is the wattage?
Seems to be too high!


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 09:54:53 PM
The wattage is 80 W.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 09:59:04 PM
Which glue do you use while working with depron? If hot glue what's the wattage of your gun ?


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: prabal276 on April 15, 2018, 10:02:48 PM
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.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 10:04:40 PM
Oh...


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: K K Iyer on April 15, 2018, 10:22:35 PM
Just checked my gun.
Itís 40 watts.
Meanwhile try some different glue stick. Some are transparent, others are white. About Rs 10-15 each.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 10:34:17 PM
Ok sir.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: prabal276 on April 15, 2018, 10:39:40 PM
@ 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.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 10:41:54 PM
It's depron/biofoam.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: prabal276 on April 15, 2018, 10:51:43 PM
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


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 15, 2018, 11:31:21 PM
Ok will cut the power supply after it's heated and try ...thanks buddy.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: AL HAM SHARI on April 15, 2018, 11:32:21 PM
You could try epoxy. Its a good alternative. Plus, its stronger than hot glue. I use Araldite.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: knvshrm on April 16, 2018, 06:10:09 AM
Yup...but it takes time to set too.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: PRANAVK09 on April 16, 2018, 06:53:31 AM
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.


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: prabal276 on April 16, 2018, 06:56:24 AM
@ knvshrm has to build a whole plane! Not attach parts to it. ;D
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


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: rcrcnitesh on April 16, 2018, 07:07:26 AM
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


Title: Re: Hot glue melts depron foam!! Plz help!!!
Post by: prabal276 on April 16, 2018, 07:08:33 AM
I was busy making modifications to my post. You posted the same thing in between. So I made more modifications  ;D ;D ;D