Oops .. someone goofed ....
Cliff
[
I've made an error turning a customers 12.5" dia x 40" long uhmw plastic roller.
It has a "V" groove every inch (about 38) for the length. The V grooves have a
flat bottom and we roughed them with a dogbone style insert. As we plunged the
center material of the V groove, we cut .250" too deep. Plenty of stock left on
the sides, but the center is too deep. Is there a process with heat, like a
heated roller, that could be used to push the excess material into our mistake?
The area that needs to be filled is roughly a 1/4" square groove.
]
tnik
Well, I'm going to guess that you can't because from what I've read, you
can't mold UHMW which is in essence what you need to do to 'fill' in the
groove.
tnik
Well, looking around a bit more.. You might be able to do it.
http://www.garlandmfg.com/plastics/faq.html
but the process in how you could is probably a close guarded secret.
Maybe thermal welding it in?
Good luck.. Scrapping such a big piece really sucks :/
wws
wrote:
Undercut two grooves and fill with epoxy.
ww
tnik
Would work.. not sure if I would do it without the customers approval.
Guess it would depend on what the roller is being used for.
raamman
>
> - Show quoted text -
eat the mistake; we all have examples of bad manufacturing and seek
another source- don't cheap out your customer, take pride in your work
and product.
Jim Stewart
Maybe you could get some stimulus money to
rework it right.
anorton
"Cliff" <Clhuprich...@aoltmovetheperiodc.om> wrote in message
news:4haos55lfiop60otr...@4ax.com...
The first thing to do is to ask the customer if this dimension matters in
the end application. They may well want to sign off on the variation rather
than have a delay in delivery. A discounted price may help induce them to
sign-off on it.
As for repairing the groove, read up on techniques for repairing ski bottoms
made from UHMW. There are powders or sticks that can be melted in.
JR North
and press into the groove. Secure with CA.
JR
Dweller in the cellar
tnik wrote:
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Cliff
Roller with specific functions I gather & I doubt epoxy would
stick/bond, clean or wear well.
--
Cliff
Cliff
wrote:
>Cut or get some uhmv 1/4" square rod, hopefully slightly oversize,heat
>and press into the groove. Secure with CA.
What is "CA"?
Cliff
Always nice to see a rethug with ideas of what they would do.
Pretty sure this guy is not one though & wants to do it right.
--
Cliff
Jim Chandler
<Clhuprich...@aoltmovetheperiodc.om> wrote:
>On Mon, 19 Apr 2010 11:50:52 -0700, JR North <junkjas...@bigfoot.com>
>wrote:
>
>>Cut or get some uhmv 1/4" square rod, hopefully slightly oversize,heat
>>and press into the groove. Secure with CA.
>
> What is "CA"?
>
Cyanoacrylate also known as Superglue.
Jim
Cliff
>On Tue, 20 Apr 2010 05:14:46 -0400, Cliff
><Clhuprich...@aoltmovetheperiodc.om> wrote:
>
>>On Mon, 19 Apr 2010 11:50:52 -0700, JR North <junkjas...@bigfoot.com>
>>wrote:
>>
>>>Cut or get some uhmv 1/4" square rod, hopefully slightly oversize,heat
>>>and press into the groove. Secure with CA.
>>
>> What is "CA"?
>>
>
>Cyanoacrylate also known as Superglue.
Umm ... do they sell it in UHMW bottles & tubes?
--
Cliff