I have to re-attach a piece of plastic which is the pivot for 2 pieces 
of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
of the 'rivet' has come off (top is about 2cm across) and needs to be 
glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
material).

What would be the best glue to do this, considering that it is under 
quite a bit of stress when the 2 arms are flexed?

Whether or not it is a long term fix is another matter - I just need it 
to work for as long as possible.

Thanks

David

"David Hearn"  wrote in message...

> What would be the best glue to do this, considering that it is under quite 
> a bit of stress when the 2 arms are flexed?


Try 2-part epoxy, like Araldite. That'll stick most things togethor, and is 
fairly durable.


-- 
Best Wishes
Simon (aka Dark Angel)
"Dark Angel's Realm of Horror" - http://www.realmofhorror.co.uk
"Realm of Horror Radio" - http://www.live365.com/stations/313834

David Hearn  wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).
> 
> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?
> 
> Whether or not it is a long term fix is another matter - I just need it 
> to work for as long as possible.


What sort of plastic?
Gluing plastics is problematic in general, many simply don't glue well.
Chances of repairing a structural element is fairly small.
Does the bit of plastic have any recycling marks? (3 arrows, with a number
inside)

David Hearn wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the
> top of the 'rivet' has come off (top is about 2cm across) and needs
> to be glued back onto the shaft (about 1cm diameter tube, about 2-3mm
> of material).
>
> What would be the best glue to do this, considering that it is under
> quite a bit of stress when the 2 arms are flexed?
>
> Whether or not it is a long term fix is another matter - I just need
> it to work for as long as possible.
>
> Thanks
>
> David


Araldite

Without seein/knowing the what it really looks like I doubt whether you
will a succesfull fix if the area is taking stress on it with glue, could
you not make another rivet? Modellers shops sell all sorts of plastic
rods/sheetplastics.

David Hearn wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).
> 
> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?
> 
> Whether or not it is a long term fix is another matter - I just need it 
> to work for as long as possible.
> 
> Thanks
> 
> David


I'm having difficulty visualising this, but as well as glueing, would it 
be possible to drill a fine hole through the "rivet" and insert a steel 
pin (even an expendable drill bit?) to give it some additional strength?

David Hearn wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).
> 
> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?
> 
> Whether or not it is a long term fix is another matter - I just need it 
> to work for as long as possible.


Think about this - your rivet has already failed once, and that was from 
an un-glued starting point. You have zero chance of getting this to work.

Other options to consider:

- Steel machine screw through the rivet
- Replace rivet with a new one
- Replace rivet with steel equivalent


-- 
Grunff

Mike Dodd wrote:
[snip]

>
> I'm having difficulty visualising this, but as well as glueing, would
> it be possible to drill a fine hole through the "rivet" and insert a
> steel pin (even an expendable drill bit?) to give it some additional
> strength?


Yes it would have been better if the OP pointed out what it is he's trying
to repair.

sounds like a hinge on a everyday item of use? mobile phone/Laptop?

David Hearn wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).
> 
> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?


Sounds a tall order for any type of glue... also, the optimum glue would 
depend on the type of plastic - what is it?

I'd definitely go for some form of mechanical reinforcement here - can 
you replace the shaft with a metal component, eg a bolt with a locking 
nut at the other end?  (Is the cosmetic appearance important - you don't 
say what the application is)  Or at the very least, if you do repair 
using glue, you could drill a small pilot hole down the centre of the 
top and shaft, and fit a screw to pull the whole lot together and 
reinforce it.

David

In article <dg0r9k$jqj$1@slavica.ukpost.com>, dave@NOswampieSPAM.org.uk 
says...

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).
> 
> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?
> 
> Whether or not it is a long term fix is another matter - I just need it 
> to work for as long as possible.
> 

Without knowing what sort of plastic, and in what sort of application, 
it's not easy to guess.  How about splurging a load of hot melt glue 
down the hollow bit then whacking the end back on?

In article <dg0r9k$jqj$1@slavica.ukpost.com>,
   David Hearn  wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).

> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?


It depends on the plastic. But unless it's one where there is a true
solvent like say perspex,it's unlikely you'll get a strong as new repair.

-- 
*Age is a very high price to pay for maturity.

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

In article ,
	"Dave Plowman (News)"  writes:

>
>It depends on the plastic. But unless it's one where there is a true
>solvent like say perspex,it's unlikely you'll get a strong as new repair.


I had a plastic lug snap off one of the internal shelf doors in
the freezer. This looked like it might be a problem to glue, so
I melted the two surfaces quickly over a gas flame and pushed
them together, and it's been fine for the 10 years of use since.
Obviously, this only works with thermosoftening plastics.

-- 
Andrew Gabriel

"Harry Bloomfield"  verbally sodomised 
in news:mn.5c947d59856675b3.8412@tiscali.co.uk: 


> David Hearn wrote :
>> I have to re-attach a piece of plastic which is the pivot for 2 pieces
>> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top
>> of the 'rivet' has come off (top is about 2cm across) and needs to be
>> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of
>> material). 
>>
>> What would be the best glue to do this, considering that it is under
>> quite a bit of stress when the 2 arms are flexed?
> 
> Glueing plastics never works well. I'm struggling to understand the 
> description of part your are trying to glue anyway.
> 
> I find I have some success by hot riviting small broken plastic parts. 
> For smaller parts I use ordinary paper staples, bent so provide the 
> reinforcement needed, then pushed into the plastic with an hot 
> soldering iron.
> 


You are an adrenaline junkie.

-- 
Phil Kyle  
Uno
Dos
Tres
Cuatro
CINCO!!!!!!

"Be very aware that my willingness 
to continue to criticise your sig 
is infinite." -- Neil Barker

"Harry Bloomfield"  verbally sodomised 
in news:mn.5c947d59856675b3.8412@tiscali.co.uk: 


> David Hearn wrote :
>> I have to re-attach a piece of plastic which is the pivot for 2 pieces
>> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top
>> of the 'rivet' has come off (top is about 2cm across) and needs to be
>> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of
>> material). 
>>
>> What would be the best glue to do this, considering that it is under
>> quite a bit of stress when the 2 arms are flexed?
> 
> Glueing plastics never works well. I'm struggling to understand the 
> description of part your are trying to glue anyway.
> 
> I find I have some success by hot riviting small broken plastic parts. 
> For smaller parts I use ordinary paper staples, bent so provide the 
> reinforcement needed, then pushed into the plastic with an hot 
> soldering iron.
> 


You are an adrenaline junkie.

-- 
Phil Kyle  
Uno
Dos
Tres
Cuatro
CINCO!!!!!!

"Be very aware that my willingness 
to continue to criticise your sig 
is infinite." -- Neil Barker

David Hearn wrote:

> I have to re-attach a piece of plastic which is the pivot for 2 pieces 
> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top 
> of the 'rivet' has come off (top is about 2cm across) and needs to be 
> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of 
> material).
> 
> What would be the best glue to do this, considering that it is under 
> quite a bit of stress when the 2 arms are flexed?
> 
> Whether or not it is a long term fix is another matter - I just need it 
> to work for as long as possible.
> 
> Thanks
> 
> David


Thanks for all the advice.  In the end I decided against gluing because 
of the weak bond it would probably end up with.  The item is basically 
something 2 foot long with a large 'hinge' in the middle (completely 
plastic item) to fold it to half size - visualise one of those old rules 
which folded in half.

The two halves were fixed together by two plastic plugs with a screw 
which held them together.  I cannot see exactly though how they screwed 
together as removing the screw does not allow the two parts to come 
apart - maybe someone's repaired it before??

Anyway - my fix in the end was to replace the plastic collar bit which 
came off, with a large metal washer.  A screw used to go through the 
middle of this collar, so I could just screw the washer on with that.  I 
had hoped to also replace the screw with a longer one, buy B&Q didn't 
have any suitable.

This is something I've sold on eBay for a not insignificant amount (not 
enough to just refund the money).  It literally fell apart as I packaged 
it!  (It's ex-work).  The fix makes the item completely working again 
and likely to be much longer lasting than either a glued repair, or even 
maybe the original design.  Therefore I'm completely happy to pass the 
item onto the purchaser - in fact, I'm glad it broke before it got 
posted, and otherwise it could very well have broken either in the post, 
or more likely when the purchaser first had a fiddle with it.

Thanks again

D

David Hearn wrote :

> I have to re-attach a piece of plastic which is the pivot for 2 pieces of 
> plastic to hinge.  It's like a plastic rivet.  Unfortunately the top of the 
> 'rivet' has come off (top is about 2cm across) and needs to be glued back 
> onto the shaft (about 1cm diameter tube, about 2-3mm of material).
>
> What would be the best glue to do this, considering that it is under quite a 
> bit of stress when the 2 arms are flexed?


Glueing plastics never works well. I'm struggling to understand the 
description of part your are trying to glue anyway.

I find I have some success by hot riviting small broken plastic parts. 
For smaller parts I use ordinary paper staples, bent so provide the 
reinforcement needed, then pushed into the plastic with an hot 
soldering iron.

-- 

Regards,
        Harry (M1BYT) (L)
http://www.ukradioamateur.org

"Harry Bloomfield"  verbally sodomised 
in news:mn.5c947d59856675b3.8412@tiscali.co.uk: 


> David Hearn wrote :
>> I have to re-attach a piece of plastic which is the pivot for 2 pieces
>> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top
>> of the 'rivet' has come off (top is about 2cm across) and needs to be
>> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of
>> material). 
>>
>> What would be the best glue to do this, considering that it is under
>> quite a bit of stress when the 2 arms are flexed?
> 
> Glueing plastics never works well. I'm struggling to understand the 
> description of part your are trying to glue anyway.
> 
> I find I have some success by hot riviting small broken plastic parts. 
> For smaller parts I use ordinary paper staples, bent so provide the 
> reinforcement needed, then pushed into the plastic with an hot 
> soldering iron.
> 


You are an adrenaline junkie.

-- 
Phil Kyle  
Uno
Dos
Tres
Cuatro
CINCO!!!!!!

"Be very aware that my willingness 
to continue to criticise your sig 
is infinite." -- Neil Barker

Phillip Kyle wrote:

> "Harry Bloomfield"  verbally sodomised 
> in news:mn.5c947d59856675b3.8412@tiscali.co.uk: 
> 
> 
>>David Hearn wrote :
>>
>>>I have to re-attach a piece of plastic which is the pivot for 2 pieces
>>>of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top
>>>of the 'rivet' has come off (top is about 2cm across) and needs to be
>>>glued back onto the shaft (about 1cm diameter tube, about 2-3mm of
>>>material). 
>>>
>>>What would be the best glue to do this, considering that it is under
>>>quite a bit of stress when the 2 arms are flexed?
>>
>>Glueing plastics never works well. I'm struggling to understand the 
>>description of part your are trying to glue anyway.
>>
>>I find I have some success by hot riviting small broken plastic parts. 
>>For smaller parts I use ordinary paper staples, bent so provide the 
>>reinforcement needed, then pushed into the plastic with an hot 
>>soldering iron.
>>
> 
> 
> You are an adrenaline junkie.


Wouldn't an araldite junking be more appropriate?  ;)

(mass cross posting by troll removed)

D

"Harry Bloomfield"  verbally sodomised 
in news:mn.5c947d59856675b3.8412@tiscali.co.uk: 


> David Hearn wrote :
>> I have to re-attach a piece of plastic which is the pivot for 2 pieces
>> of plastic to hinge.  It's like a plastic rivet.  Unfortunately the top
>> of the 'rivet' has come off (top is about 2cm across) and needs to be
>> glued back onto the shaft (about 1cm diameter tube, about 2-3mm of
>> material). 
>>
>> What would be the best glue to do this, considering that it is under
>> quite a bit of stress when the 2 arms are flexed?
> 
> Glueing plastics never works well. I'm struggling to understand the 
> description of part your are trying to glue anyway.
> 
> I find I have some success by hot riviting small broken plastic parts. 
> For smaller parts I use ordinary paper staples, bent so provide the 
> reinforcement needed, then pushed into the plastic with an hot 
> soldering iron.
> 


You are an adrenaline junkie.

-- 
Phil Kyle  
Uno
Dos
Tres
Cuatro
CINCO!!!!!!

"Be very aware that my willingness 
to continue to criticise your sig 
is infinite." -- Neil Barker

On Sun, 11 Sep 2005 09:53:07 +0100, David Hearn  
 wrote:


> I have to re-attach a piece of plastic which is the pivot for 2 pieces  
> of plastic to hinge.  It's like a plastic rivet.


There is quite a range of plastics. If you can shave a sliver off, hold it  
in tweezeers, light it note the nature of the flame (if any) and the odour  
on the flame going out, I could venture a guess.

John Schmitt

-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/