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Posted by Royston Vasey on February 9, 2010, 7:54 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.
>
I don't have much in the way of machinery so I've made do with what I have.
The wire is 316 stainless and is quite "springy". An arbor press is on my
wish list (along with a mill, guillotine, panbrake..........)
> 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.
>
I can't quite visualise what you mean. I've tried a few different
arrangements, the one I have come up with seems to be the best in terms of
being simple to manufacture with the tools I have to hand.
> --
> 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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