Oh, boy, you have a handful...by the way, you really should put a metallic
wire in the syringe needle before you cut it short... remove the wire by (a)
grind off the tip (remove the burrs) and (b) remove the wire...Before you do
anything, support (mount) well of your needles before cut ...(hard wax or
other stuff similar to that should do the trick)...my 2 cents...may not work.
by the way, found Grace telephone and address for you (not sure what is
"RF-silver epoxy"...only known as conductive adhesives):
Grace US: Tel: 617-861-6600 FAX 617-861-9590
Grace Europe: Grace N.V.
Nijverheidsstraat 7 (don't ask me what does that mean)
B-2260 Westerlo, Belgium
+32-(0) 14 57 56 11 (don't ask me how to dail (0))
Never order any epoxy from Belgium...I am only interested Chocolate...;-)
good luck.....
jk
At 03:41 PM 9/8/99 +0200, you wrote:
>Dear Mr Aussilek c/o Coopers Crossing
>
>1. You don't understand. When I say between 1,600 eyes I mean 1,600 eyes.
Reason: when they at TechNet see that it's me again they look suspiciously
with one eye. 1,600x1=1,600.
>
>2. Need your advice (and the other 3-4 dispenser interested guys)quickly. I
have cut some syringes and sliced them and opened them for having a look on
inside, and I marvelled. Imagine californian redwoods bent inwards out, that
what I see. Can I send you a photo, Aussilek, for professional opinion
(despite all joking). I'm not intending to spread these results to others
than those who have supported me, wouldn't be fair at the moment, maybe a
report later when problems are solved. Can you give your opinion asap, we
will possibly go to Boston for discussions with a supplier.
>
>3.Your proposal how to test syringes wasn't so succesful. Ended in 20
liters of honey on the floor, my wife didn't like it, millions of wasps
waiting on outside. Do you have a simpler way, Aussilek?
>
>4. Green eyes, no problem, glad you didn't say (hrm)the brown one.
>
>Ingemar
>
>
>-----Original Message-----
>From: Paul Klasek [mailto:[log in to unmask]]
>Sent: den 7 september 1999 04:34
>To: [log in to unmask]
>Subject: Re: [TN] Clogging dispensers soon...
>
>
>Hi Pumpkin
>Severe question indeed (what's this da business, I thought Stockholm not
>being in Finland would escape the Russian influences? ) . Lets go through
>Pumpkin's module of Steve's maths :
>I)
>1600(+)members = 1600(+)buds with 2eyes each = 3200(+)eyes cyber conference
>.
>Pictured the parallel lines (one cross-eyed pair in infinity), correct,
>looks like HK airport in typhoon process .
>a)
>hindrance, correct, but NOT in outlet of needle (drips, remember?); the
>inlet more likely :
>flakes being clumsy solids in fluids will be manipulated by inconsiderate
>internals (angles, reductions, etc);
>on top of standard wall drag .
>overpressure, correct again with the low viscosity (considering your minimal
>pressure reported).
>I always stated piston (linear) would beat auger in this application.
>One of other dispensers (air all the way) for silicones we have here takes
>off the pressure (sudden = gulp back)on the end of cycle ; whereas the gulp
>back sucks back the running inertia ; than keeps level with 0psi .
>Even the position and stage of emptiness of cartridge (vertical, horizontal,
>below or above dispensing point, full or quarter full only, etc.) was rather
>critical in the long (repeatability) run on this low viscosity's (drips).
>Unless designed that way (642 auger is not); without positive shut of
>valve(paste) or at least air release (non complicated in low psi's ; as it
>can not gulp the cartridge piston back) ; you have very little chance of
>repeatability condition.
>Sound some poor soul over there did not validate the application and still
>tries to put square peg to round hole .
>Hope it's not you . The auger will spiral the CONSTANT pressure if you stop
>on low viscosity > drips .
>b
>no it won't be a problem as such (with consistent suspended particles), the
>mass and it's composition stays more or less same ; however the smeared
>agglomerations from auger will plug you up (right there).
>c
>hmm ; bad idea pumpkin :
>c1
>precision cut needed ; take burr of inside ; put chamfer back on the outside
>(essential for release),
>ok you can do it ; I know ; still:
>c2
>you alter (if not remove) the streamlining factor for the flow ;
>and get the "impression" of auger onto the dot;
>seen even a crawl-up back on outside of the needle with very short orifices
>(pending viscosity)!
>c3
>2mm or 10mm ; the blockage would occur on inlet ; not down the pipe .
>>From flakes view ; once (if) in, that length would have actually more
>streamlining effect :
>paralleling the flakes due to side drag = no issue there .
>c4
>the cutest one on the end : what do you 'think' prevents you from worst
>still dripping presently ?
>Drag on the needle walls ! The length is actually very much stabilizing
>factor :
>Empirical test : head to your kitchen ; take 2 funnels ' chop one short ;
>stand 'm on bottles ;
>2 honey jars in two (2)hands ; even pour , and watch thereafter .
>if you mix few comparatively sifted flakes in (no bubbles please) ;
>it will open your (2) eyes (green?)in no time .
>
>see yo'
> paul
>
>PS
>Cleaning ; pressurized water (grease pump should do you): put needle back on
>cartridge; plug side tube;
>connect water ; and press the hydraulics button .
>Laser cuts into metal, and how would you feel to be sandblasted ?!?
>Perhaps a considerate winding (yes, you've guessed it, your sewing machine
>spool winder) cotton thread inside polish would do ?
>
>PPS
>Sorry, it's niet, pumpkin ; wrong theory ; rapid efforts in this direction
>are getting you fast nowhere .
>
>Now ; lets see if your alleged Cyclops come home with bacon .
>I'd consider an apology to the bright stereoscopic (at least, discounting
>Shiva disciples) lodge here, pumpkin .
>
>
>
>
>-----Original Message-----
>From: Ingemar Hernefjord (EMW)
>[mailto:[log in to unmask]]
>Sent: Monday, 6 September 1999 20:57
>To: [log in to unmask]
>Subject: [TN] Clogging dispensers soon...
>
>
>Rescuers of going-crazy-dispenser-technicians, Morning to you all,
>I must have a talk with you between 1,600 eyes. Take a chalk go to an
>airport and paint two paralell lines, 1000 meters long and 150 meters apart.
>Then make obstacles here and there that makes the path only 100 meter wide
>or even 75 meters. This is your runway for taking down a Galaxy. Could go,
>but what if you have some Cessnas att the same time? That's what the silver
>flakes have too pass in a 10mm long syringe, with a nominal diameter on
>150um, a minus tolerance upon that plus other obstacles on the walls. Now,
>
>a ) suggest that you get some flow hindrance near the syringe's outlet,
>caused by large flakes agglomeration, what will happen the nearest tenths of
>seconds after the auger stopped dispensing? Won't there be a small
>overpressure on inside of the syringe? And won't that small overpressure
>decrease simultaneously with the small amount of paste that passes the
>obstacles and comes out of the syringe? Can this be a reasonable theory why
>we see small amounts of paste dripping out from the syringe when the robotic
>make a secon or two pause?
>
>b) won't it be a problem for all flakes to pass all these 10 mms long
>syringe in a 80-150um channel, especially if many flakes differ from the
>paste's medium size, I mean 30-50um instead om 5um? And won't it be even
>worse if som flakes agglomerated already in the pump before coming to the
>syringe?
>
>c) coming finally to my proposal. If you cut your syringe to, let's say 2mm
>length instead of 10mm, won't the whole problem be much smaller? IF there is
>still some obstacles, the volume on inside the syringe is much smaller =
>less leakage of paste between dots (pauses), because built-up pressure will
>go down much quicker. And the clogging risk ought to be much smaller even
>that, won't it because 4/5ths of the tunnel is gone.
>
>Aussilek use to be brightest, but there ought to be more with (he-he).
>Severe question: am I right? Please, say da. If the theory seems OK, we will
>make a very rapid effort in order to get the precision line running /
>
>Ingemar Hernefjord
>Ericsson Microwave Systems
>
>PS. Following question: with a 2mm long syringe, could laser be way to
>remove remaining obstacles so that a 150um-minus75um- syringe becomes a
>true 150um syringe? Or jetwater? Or sandblast?
>
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