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Posted by Larry Jaques on February 9, 2010, 7:23 am
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On Tue, 9 Feb 2010 11:45:46 +0800, the infamous "Royston Vasey"
>
>> On Mon, 8 Feb 2010 21:07:21 +0800, the infamous "Royston Vasey"
>>
>>>
>>>I'm forming some wire mesh cloth - that part is going ok.
>>>
>>>The finished part needs to be compressed to fit into a pvc part - working
>>>it
>>>in by hand results in scratching and marking of the pvc. I'm looking for
>>>some ideas on how to compress the mesh part so it slips cleanly into the
>>>pvc
>>>part. There's a few pics in the dropbox:
>>>
>>>http://www.metalworking.com/dropbox/wire_screen.pdf
>>
>> Think "tampons", Royston. <vbg> How about a teflon sleeve with an OD
>> the size of the ID of the PVC to help guide the screen in?
>>
>> Or a pair of spr
>
>ing steel guides on sticks, curved tongs if you will.
>>
>> Questions: Do you later "inflate" the cup back to full inside
>> diameter? What do you use to secure it to the PVC? And, last but not
>> least, whatever are these used for?
>>
>> Another thought: If you were to compress the cup closer to final
>> diameter, it might be easier to work with. It appears to have lots of
>> gaps between the folds and OD.
>
>Everytime I think tampons I'm reminded of UK's Prince Charles bugged phone
>call where he told I think it was Camilla Gorilla his bit on the side at the
>time that he "wished he was her tampon" - a nasty thought! :|
Heh heh heh.
>The tongs is a good idea - I just made something similar using some
>crimpers:
>
>
>http://www.metalworking.com/dropbox/wire_screen_tool.pdf
Ah, good!
>Once in place the screen springs back quite a bit, I still need some
>urethane - maybe sika 191, 293 ?? The black marine stuff anyway, that works
>really well on most things. The screen is a shield over a humidity sensor -
>to stop fingers and look nice more than anything else. I don't think there
>is a way to eliminate the folds and extra mesh / cloth. The cloth doesn't
>want to stretch enough so a degree of folding results.
Have you tried a press in the shape of those tongs? Place screen cup
over mandrel and compress vigorously with tons of force to 'set' the
folds tighter.
Alternatively, have you thought of just using a disc of screen and a
slightly longer piece of PVC, dadoing in the flat screen piece? You
could even use a heftier screen gauge to keep fingers from damaging
it.
--
We don't receive wisdom; we must discover it for ourselves
after a journey that no one can take for us or spare us.
-- Marcel Proust
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>
> The finished part needs to be compressed to fit into a pvc part - working=