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Author Topic: epoxy sealing  (Read 2580 times)

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Offline frodoTopic starter

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epoxy sealing
« on: February 07, 2009, 05:29:40 PM »
hi, which epoxy should i use to stick something in a container so that it is a relatively quick dry and doesn't get too hot. also, would there be a way to undo "epoxying" to get components out of the epoxy?
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Offline Soeren

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Re: epoxy sealing
« Reply #1 on: February 07, 2009, 10:58:21 PM »
Hi,

Araldite Red, which is a "10 minute" epoxy, or a similar product of a competing brand.
Araldite Blue is a "24 hour" epoxy but quite a bit stronger (I always stock both types, as some situations needs the quick hardening type, but I prefer A. Blue for most jobs).

Neither of them gets too hot... As you see, I kept your very precise and well referenced measuring scale ;)

To "undo" epoxy, place it for around 20 minutes (perhaps less) in boiling water and it will soften to a viscosity like molasses.
USE PLIERS, PATIENCE AND GLOVES! - Boiling water is nasty whether you dip your pinkies in it, or knock/jerk the pot hard enough to pour it on yourself... And the molten epoxy is even worse, since it sticks and keeps burning your skin.
Regards,
Søren

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Offline Joesavage1

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Re: epoxy sealing
« Reply #2 on: February 08, 2009, 01:49:25 AM »
Whats Epoxy?



Sorry for interupting


Joe

Offline frodoTopic starter

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Re: epoxy sealing
« Reply #3 on: February 08, 2009, 05:31:08 AM »
epoxy is a type of adhesive (glue) which heats up while it solidifies. thanks soeren ;)
« Last Edit: February 08, 2009, 05:33:23 AM by frodo »
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Offline Joesavage1

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Re: epoxy sealing
« Reply #4 on: February 08, 2009, 08:12:41 AM »
is at as good as contact adhesive or super glue, or does it just depend on the material its used on?


Thanks

Joe

Offline frodoTopic starter

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Re: epoxy sealing
« Reply #5 on: February 08, 2009, 08:18:19 AM »
i think that are the same although superglue doesn't bond metal and i think that epoxy does bond metal. so, epoxy is better for some applications and not others. handy to have all types of adhesive around, i suppose
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Offline Joesavage1

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Re: epoxy sealing
« Reply #6 on: February 08, 2009, 09:02:07 AM »
Cool.

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Joe

Offline frodoTopic starter

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Re: epoxy sealing
« Reply #7 on: February 08, 2009, 09:24:06 AM »
wicked. at least you've built a robot :D
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Offline Joesavage1

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Re: epoxy sealing
« Reply #8 on: February 08, 2009, 09:25:40 AM »
wicked. at least you've built a robot :D

Havnt built it yet, dont get the schematic so am currently asking peeps on a different topic (or post or wtv)


Joe

Offline frodoTopic starter

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Re: epoxy sealing
« Reply #9 on: February 08, 2009, 09:31:14 AM »
i have the PCB design for the $50 robot. you could work out where the parts go. could be tricky though. attached PCB design and perf board design
« Last Edit: February 08, 2009, 09:32:06 AM by frodo »
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Offline Joesavage1

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Re: epoxy sealing
« Reply #10 on: February 08, 2009, 09:38:35 AM »
OMG i must be really stupid i just dont seem to get anything  :'(
I just cant figure out how it works

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Offline frodoTopic starter

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Re: epoxy sealing
« Reply #11 on: February 08, 2009, 09:39:34 AM »
which bit don't you get? i didn't get any of it at first.
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Offline Joesavage1

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Re: epoxy sealing
« Reply #12 on: February 08, 2009, 09:41:01 AM »
i dont really get any of it, i dont get were to put the bits on the board , and i dont get which bits go where



Joe

Offline frodoTopic starter

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Re: epoxy sealing
« Reply #13 on: February 08, 2009, 09:42:03 AM »
this is the schematic which shows you where the stuff goes
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Offline Soeren

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Re: epoxy sealing
« Reply #14 on: February 08, 2009, 04:41:26 PM »
Hi,

is at as good as contact adhesive or super glue, or does it just depend on the material its used on?

Bonding technology is a hugely wide subject.
Contact glue is not a single product, but sort of a family, where some are good for some materials and then again some for other materials. For leather work eg., I only go with a product called Neotol, which for leather is several times stronger than "ordinary" contact glue.

Super Glue (Cyanoacrylate) has evolved to a family as well and some types can even be had with different hardening times. Cyano goes with almost anything, a gelled type is used for porous materials. It is used in forensics as well, to "develop" fingerprints with, by putting the object with finger prints in a closed aquarium with a flat dish with liquid glue in it - after a while, the prints can be seen in white, as the cyano hardens on the grease of the prints.

Epoxy is very strong and adheres to most materials (some plastics is a problem for most glues) and differs itself from cyano by its non sinking property - it can fill out missing parts, whereas the cyano needs totally fitting parts.

Like a single screwdriver won't fit all screws, no single glue will fit all bonding jobs.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

Offline Joesavage1

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Re: epoxy sealing
« Reply #15 on: February 10, 2009, 01:03:54 PM »
Hi,

is at as good as contact adhesive or super glue, or does it just depend on the material its used on?

Bonding technology is a hugely wide subject.
Contact glue is not a single product, but sort of a family, where some are good for some materials and then again some for other materials. For leather work eg., I only go with a product called Neotol, which for leather is several times stronger than "ordinary" contact glue.

Super Glue (Cyanoacrylate) has evolved to a family as well and some types can even be had with different hardening times. Cyano goes with almost anything, a gelled type is used for porous materials. It is used in forensics as well, to "develop" fingerprints with, by putting the object with finger prints in a closed aquarium with a flat dish with liquid glue in it - after a while, the prints can be seen in white, as the cyano hardens on the grease of the prints.

Epoxy is very strong and adheres to most materials (some plastics is a problem for most glues) and differs itself from cyano by its non sinking property - it can fill out missing parts, whereas the cyano needs totally fitting parts.

Like a single screwdriver won't fit all screws, no single glue will fit all bonding jobs.


Cool, thanks for the info.




this is the schematic which shows you where the stuff goes

Thanks for this and an msn chat; now i slightly understand it and will say if i have any further quesions



Thanks

Joe

 


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