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slightly off topic: recommended glue for attacing one circuit board to another

slightly off topic: recommended glue for attacing one circuit board to another

2010-02-09 by Kjell M. Myksvoll

Hi,

Probably a somewhat silly question, but...

I need to attach a small populated circuit board on top of a
(much) larger, also populated, circuit board. Next it should
be easy to separate them, without destroying anything, later
on if that should be needed. That is I want to achieve the
same as one usually do with using spacers, but with using
glue.

Is there any type of glue that can be used this? Can one use
"hot-gun" glue for this?

Thanks in advance!

br,
kmm

Re: [Homebrew_PCBs] slightly off topic: recommended glue for attacing one circuit board to another

2010-02-09 by Stefan Trethan

Does it need to be very solid, or just hold on?

A gentle and removable nice looking option is adhesive coated foam.
You can get tape and pads, different thicknesses, you want both sides
sticky. This is widely used in all sorts of products. It should be
thick enough so you can never compress both adhesive sides together,
or they might rip components off (happened to most Samsung SGH 2400
phones). That's a problem with any strong glue or spacer material, so
the foam is good because it will flex or even rip before that happens.

Hot glue will work for this, I've used it a number of times to stick
stuff right on top of populated circuit boards. But it'll look very
much like a bodge no matter how neat you try to do it. If that don't
matter it's a solution.

ST
Show quoted textHide quoted text
On Tue, Feb 9, 2010 at 9:05 PM, Kjell M. Myksvoll <kmyksvo@...> wrote:
> Hi,
>
> Probably a somewhat silly question, but...
>
> I need to attach a small populated circuit board on top of a
> (much) larger, also populated, circuit board. Next it should
> be easy to separate them, without destroying anything, later
> on if that should be needed. That is I want to achieve the
> same as one usually do with using spacers, but with using
> glue.
>
> Is there any type of glue that can be used this? Can one use
> "hot-gun" glue for this?
>
> Thanks in advance!
>
> br,
> kmm
>
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>

Re: [Homebrew_PCBs] slightly off topic: recommended glue for attacing one circuit board to another

2010-02-09 by Leon Heller

On 09/02/2010 20:05, Kjell M. Myksvoll wrote:
> Hi,
>
> Probably a somewhat silly question, but...
>
> I need to attach a small populated circuit board on top of a
> (much) larger, also populated, circuit board. Next it should
> be easy to separate them, without destroying anything, later
> on if that should be needed. That is I want to achieve the
> same as one usually do with using spacers, but with using
> glue.
>
> Is there any type of glue that can be used this? Can one use
> "hot-gun" glue for this?

I use Blu-Tack for that sort of thing. It's not very pretty but it works 
very well.

Leon

Re: [Homebrew_PCBs] slightly off topic: recommended glue for attacing one circuit board to another

2010-02-09 by Kjell M. Myksvoll

Hi,

It should just hold on. But the card that it is to be
attached to is standing vertically. But the smaller
card is rather light and small, so I don't think gravity
will come into play - even in the long run...

Never actually thought about adhesive foam. Shall take
a look at it.

Thanks!

br,
kmm


ti., 09.02.2010 kl. 21.46 +0100, skrev Stefan Trethan:
Show quoted textHide quoted text
> Does it need to be very solid, or just hold on?
> 
> A gentle and removable nice looking option is adhesive coated foam.
> You can get tape and pads, different thicknesses, you want both sides
> sticky. This is widely used in all sorts of products. It should be
> thick enough so you can never compress both adhesive sides together,
> or they might rip components off (happened to most Samsung SGH 2400
> phones). That's a problem with any strong glue or spacer material, so
> the foam is good because it will flex or even rip before that happens.
> 
> Hot glue will work for this, I've used it a number of times to stick
> stuff right on top of populated circuit boards. But it'll look very
> much like a bodge no matter how neat you try to do it. If that don't
> matter it's a solution.
> 
> ST
> 
> On Tue, Feb 9, 2010 at 9:05 PM, Kjell M. Myksvoll <kmyksvo@...> wrote:
> > Hi,
> >
> > Probably a somewhat silly question, but...
> >
> > I need to attach a small populated circuit board on top of a
> > (much) larger, also populated, circuit board. Next it should
> > be easy to separate them, without destroying anything, later
> > on if that should be needed. That is I want to achieve the
> > same as one usually do with using spacers, but with using
> > glue.
> >
> > Is there any type of glue that can be used this? Can one use
> > "hot-gun" glue for this?
> >
> > Thanks in advance!
> >
> > br,
> > kmm
> >
> >
> >
> >
> > ------------------------------------
> >
> > Be sure to visit the group home and check for new Links, Files, and Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
> >
> 
> 
> ------------------------------------
> 
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> 
> 
> 
> 
>

Re: slightly off topic: recommended glue for attacing one circuit board to another

2010-02-10 by Richard

--- In Homebrew_PCBs@yahoogroups.com, "Kjell M. Myksvoll" <kmyksvo@...> wrote:
>
> Hi,
> 
> Probably a somewhat silly question, but...
> 
> I need to attach a small populated circuit board on top of a
> (much) larger, also populated, circuit board. Next it should
> be easy to separate them, without destroying anything, later
> on if that should be needed. That is I want to achieve the
> same as one usually do with using spacers, but with using
> glue.
> 
> Is there any type of glue that can be used this? Can one use
> "hot-gun" glue for this?

Hot-glue is pretty tough stuff to remove.

But I think a viable candidate is RTV rubber which comes in a tube
like toothpaste. You can squeeze a blob on the base board and settle
the smaller board on top of it. It will hold quite well, but you can
remove it if you need to, and scrape it all off with a razor blade.

We use it a lot for things like assembling speaker systems. You can
use a bead of RTV around the speaker flange to mount the speaker and
provide the seal at the same time. But it is "re-enterable" and you
can separate it with a sharp knife and just pull the speaker off.

Re: [Homebrew_PCBs] Re: slightly off topic: recommended glue for attacing one circuit board to another

2010-02-10 by kabowers@NorthState.net

On Wed, 10 Feb 2010 06:55:23 -0000, you wrote:

>snip<
>But I think a viable candidate is RTV rubber which comes in a tube
>like toothpaste. You can squeeze a blob on the base board and settle
>the smaller board on top of it. It will hold quite well, but you can
>remove it if you need to, and scrape it all off with a razor blade.
>
>We use it a lot for things like assembling speaker systems. You can
>use a bead of RTV around the speaker flange to mount the speaker and
>provide the seal at the same time. But it is "re-enterable" and you
>can separate it with a sharp knife and just pull the speaker off.
>
>
Good way to go. You may want to use the "electronic" version
that cures without the vinegar smell to avoid the possibility of
corrosion.

Keith Bowers WB4LSJ- Thomasville, NC

Re: slightly off topic: recommended glue for attacing one circuit board to another

2010-02-10 by Frank P

If you are going to have to attach and remove the board often, I would use velcro....

Adhesive foam is the best for "permanent" solutions.

--- In Homebrew_PCBs@yahoogroups.com, "Kjell M. Myksvoll" <kmyksvo@...> wrote:
Show quoted textHide quoted text
>
> Hi,
> 
> It should just hold on. But the card that it is to be
> attached to is standing vertically. But the smaller
> card is rather light and small, so I don't think gravity
> will come into play - even in the long run...
> 
> Never actually thought about adhesive foam. Shall take
> a look at it.
> 
> Thanks!
> 
> br,
> kmm
> 
> 
> ti., 09.02.2010 kl. 21.46 +0100, skrev Stefan Trethan:
> > Does it need to be very solid, or just hold on?
> > 
> > A gentle and removable nice looking option is adhesive coated foam.
> > You can get tape and pads, different thicknesses, you want both sides
> > sticky. This is widely used in all sorts of products. It should be
> > thick enough so you can never compress both adhesive sides together,
> > or they might rip components off (happened to most Samsung SGH 2400
> > phones). That's a problem with any strong glue or spacer material, so
> > the foam is good because it will flex or even rip before that happens.
> > 
> > Hot glue will work for this, I've used it a number of times to stick
> > stuff right on top of populated circuit boards. But it'll look very
> > much like a bodge no matter how neat you try to do it. If that don't
> > matter it's a solution.
> > 
> > ST
> > 
> > On Tue, Feb 9, 2010 at 9:05 PM, Kjell M. Myksvoll <kmyksvo@...> wrote:
> > > Hi,
> > >
> > > Probably a somewhat silly question, but...
> > >
> > > I need to attach a small populated circuit board on top of a
> > > (much) larger, also populated, circuit board. Next it should
> > > be easy to separate them, without destroying anything, later
> > > on if that should be needed. That is I want to achieve the
> > > same as one usually do with using spacers, but with using
> > > glue.
> > >
> > > Is there any type of glue that can be used this? Can one use
> > > "hot-gun" glue for this?
> > >
> > > Thanks in advance!
> > >
> > > br,
> > > kmm
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Be sure to visit the group home and check for new Links, Files, and Photos:
> > > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> > >
> > >
> > >
> > >
> > 
> > 
> > ------------------------------------
> > 
> > Be sure to visit the group home and check for new Links, Files, and Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> > 
> > 
> > 
> > 
> >
>

Re: slightly off topic: recommended glue for attacing one circuit board to another

2010-02-11 by Dale

Another vote for silastic (RTV, silicone rubber, etc).  I haven't used it on PCB Assy's, but I HAVE used it to hold things together that I expect to disassemble (once, or a few times - not repeatedly!) in the future.  Place a bead around the perimeter and let it cure.  When it's time to take things apart, slide your razor knife around the edge and the two pieces are loose in your hands.  DEFINITELY use an "electronic grade" formulation - the catalysts in the other kinds are corrosive to metals over time.

Another alternative is two-sided "carpet tape".  I use a lot of the stuff in the woodshop to hold two pieces together when I want them to be machined (sawed, drilled, routed, etc) EXACTLY alike.  Characteristics vary quite a bit among brands.  Some has adhesive that grabs and holds tenaciously; others are more easily peeled apart.  Some has a very thin plastic base material that demands the two surfaces must be very flat and smooth to get adhesion; others have thicker substrates that seem to fill in minor irregularities (like wood grain) in the pieces being joined.

Dale


--- In Homebrew_PCBs@yahoogroups.com, "Richard" <richard@...> wrote:
Show quoted textHide quoted text
>
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, "Kjell M. Myksvoll" <kmyksvo@> wrote:
> >
> > Hi,
> > 
> > Probably a somewhat silly question, but...
> > 
> > I need to attach a small populated circuit board on top of a
> > (much) larger, also populated, circuit board. Next it should
> > be easy to separate them, without destroying anything, later
> > on if that should be needed. That is I want to achieve the
> > same as one usually do with using spacers, but with using
> > glue.
> > 
> > Is there any type of glue that can be used this? Can one use
> > "hot-gun" glue for this?
> 
> Hot-glue is pretty tough stuff to remove.
> 
> But I think a viable candidate is RTV rubber which comes in a tube
> like toothpaste. You can squeeze a blob on the base board and settle
> the smaller board on top of it. It will hold quite well, but you can
> remove it if you need to, and scrape it all off with a razor blade.
> 
> We use it a lot for things like assembling speaker systems. You can
> use a bead of RTV around the speaker flange to mount the speaker and
> provide the seal at the same time. But it is "re-enterable" and you
> can separate it with a sharp knife and just pull the speaker off.
>

Re: [Homebrew_PCBs] Re: slightly off topic: recommended glue for attacing one circuit board to another

2010-02-13 by GARY WEBB

Some RTV's have an acetic acid componet. Smells like vinegar. Don't use  I have done repairs
on medical equipment that used RTV to seal against moisture and the manufacturer(s) specified
non-acetic acid types because they don't cause corosion to electronic circuit 
components.

--- On Wed, 2/10/10, Dale <dchisholm_engr@...> wrote:
Show quoted textHide quoted text
From: Dale <dchisholm_engr@yahoo.com>
Subject: [Homebrew_PCBs] Re: slightly off topic: recommended  glue for attacing one circuit board to another
To: Homebrew_PCBs@...m
Date: Wednesday, February 10, 2010, 11:30 PM







 



  


    
      
      
      Another vote for silastic (RTV, silicone rubber, etc).  I haven't used it on PCB Assy's, but I HAVE used it to hold things together that I expect to disassemble (once, or a few times - not repeatedly!) in the future.  Place a bead around the perimeter and let it cure.  When it's time to take things apart, slide your razor knife around the edge and the two pieces are loose in your hands.  DEFINITELY use an "electronic grade" formulation - the catalysts in the other kinds are corrosive to metals over time.



Another alternative is two-sided "carpet tape".  I use a lot of the stuff in the woodshop to hold two pieces together when I want them to be machined (sawed, drilled, routed, etc) EXACTLY alike.  Characteristics vary quite a bit among brands.  Some has adhesive that grabs and holds tenaciously; others are more easily peeled apart.  Some has a very thin plastic base material that demands the two surfaces must be very flat and smooth to get adhesion; others have thicker substrates that seem to fill in minor irregularities (like wood grain) in the pieces being joined.



Dale



--- In Homebrew_PCBs@ yahoogroups. com, "Richard" <richard@... > wrote:

>

> 

> 

> --- In Homebrew_PCBs@ yahoogroups. com, "Kjell M. Myksvoll" <kmyksvo@> wrote:

> >

> > Hi,

> > 

> > Probably a somewhat silly question, but...

> > 

> > I need to attach a small populated circuit board on top of a

> > (much) larger, also populated, circuit board. Next it should

> > be easy to separate them, without destroying anything, later

> > on if that should be needed. That is I want to achieve the

> > same as one usually do with using spacers, but with using

> > glue.

> > 

> > Is there any type of glue that can be used this? Can one use

> > "hot-gun" glue for this?

> 

> Hot-glue is pretty tough stuff to remove.

> 

> But I think a viable candidate is RTV rubber which comes in a tube

> like toothpaste. You can squeeze a blob on the base board and settle

> the smaller board on top of it. It will hold quite well, but you can

> remove it if you need to, and scrape it all off with a razor blade.

> 

> We use it a lot for things like assembling speaker systems. You can

> use a bead of RTV around the speaker flange to mount the speaker and

> provide the seal at the same time. But it is "re-enterable" and you

> can separate it with a sharp knife and just pull the speaker off.

>





    
     

    
    


 



  






      

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