adhesive dispensing shaped nozzle
adhesive dispensing shaped nozzle
(OP)
I wish to dispense an adhesive or sealant in a continuous circular pattern about 10 mm onto a flat metal foil disk. Epoxy or acrylic UV cured are favoured.
This will be used in automation machine working at 60 shots per min.
Rather than a single point nozzle and moving in circular pattern, are there any nozzles available, capable of generating continuous circular pattern in one shot?
I will be using a precision metering valve lipe an EFD Pico.
thanks
This will be used in automation machine working at 60 shots per min.
Rather than a single point nozzle and moving in circular pattern, are there any nozzles available, capable of generating continuous circular pattern in one shot?
I will be using a precision metering valve lipe an EFD Pico.
thanks





RE: adhesive dispensing shaped nozzle
- have the material stop relative motion (between injector and substance)
- have valve turn on
- have fluid flow between valve and needle tip
- have fluid leave needle tip and hit substance
- have fluid hit substance and (start) spreading out in a "a very even" round pile
- have valve shut off
- have fluid stop all the way between valve and the "pile" on the substance (no drips!) and no spatter and still have the "pile" be even and round (or it won't spread out into an even round final shape)
- have the substance accelerate again (either needle move or substance move)
- reposition the two (needle and substance)
Ain't gonna happen easily. All of above assumes the "glue" will smoothly spread out again into your theoretical perfect circle after deposition.
This is why most dispensers like that use a continuous circular path of many hundred needles simultaneously injecting a stream of material into the rotating "bottle mouth"
of the empty containers going past. No relative motion and no acceleration problems between needle and bottle. Each needle valve can open-operate-close with the fluid getting injected into the bottle (in your case, on to a single even point or "pile" of liquid) while other "piles" are in other parts of the assembly line.
Very, very expensive to set up and test. Very cheap to operate once running.
Costs much more though.
RE: adhesive dispensing shaped nozzle
You could also try transferring the adhesive from a "well". The well would have a wiper that would keep the thickness constant, then a pad could dip into the well and transfer a ring of adhesive to the foil (think rubber stamping). You would have to hold the foil in place so it didn't stick the the pad. Given your process time requirement, this could be achieved with a delta robot (3 parallel arms).
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RE: adhesive dispensing shaped nozzle
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: adhesive dispensing shaped nozzle
It sounds like you want to make a donut, or toroidal form? Look at the nozzle of a donut making machine.
...He said, expecting to be able to pull up a link on google images....
If you don't know what one looks like, I could sketch it...
RE: adhesive dispensing shaped nozzle
http://www.nordson.com/en-us/divisions/industrial-...