02-17-2010, 03:57 AM,
(This post was last modified: 02-18-2010, 01:34 AM by garyt32.)
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garyt32
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Clogged powder ports on a 9MP ( New picture added)
I am spraying the same powder on 3 production lines, all using the same equipment. A 9mc controller, 9mb gun with a G nozzle, # 2 powder ports (2 of them) and using a 9MP feeder. One of the stations keeps fouling the powder ports, plugging it over. it is like a cap forms over it. Operators tell me it is always the same one that fouls and the other is clean. we have already taken .100 off of the length as recommended by metco on all of these stations.
Help me Please, as the time I left I swapped out the 9MP with a different unit to eliminate it from being the cause of the problem.
I am getting desperate, any thoughts would be appreciated.
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02-18-2010, 01:32 AM,
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garyt32
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RE: Clogged powder ports on a 9MP
(links dead)
Here is a picture of the nozzle and powder ports, still the same problem with a different 9MP feeder, It is like the powder is bouncing back off of the rotating part being sprayed, It is always the same port being capped over. looks like in the morning I get to start looking closer.
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02-19-2010, 07:11 PM,
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dcrawford
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RE: Clogged powder ports on a 9MP ( New picture added)
Any luck fixing your Clogged Powder Port Problem?
I have used particle imaging instruments to help diagnose problems like this in the past. They can give a very useful picture as to where to look for the problem for example:
1. Determining if the carrier gas flow rate is sufficient.
2. Determining if the powder is penetrating the plasma.
3. Determining the stability of the plasma and injector orientation to the plasma.
4. Determining if powder is bouncing back from the part being sprayed.
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04-03-2010, 02:18 AM,
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Gordon
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RE: Clogged powder ports on a 9MP ( New picture added)
Hi Gary
How did the testing go? Have you managed to discover cause of problem and hopefully a remedy? I would be interested to know what powder and parameter set you are using?
Either way I do wish you luck
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04-16-2010, 02:32 PM,
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Diucky
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RE: Clogged powder ports on a 9MP ( New picture added)
Hi Gary,
Did you try to spray in other area of your spraybooth?
I have seen this problem one time and the problem was due to exhaust turbulence.
Regards
Diucky
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