10-19-2012, 03:17 AM,
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MREMERSON
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Metco p
Hi everyone
I’m a new member and getting started in thermal spray. I purchased a gun on E-Bay which is a Metco Type p as it says on the gun, i have been looking for a manuel or any kind of info but no luck, i called Metco and they laughed at me saying its 40 years old and it won’t work with today’s powders, has anyone heard of this gun? Any info would be appreciated.
Thanks
Rich
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10-19-2012, 04:04 AM,
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Gordon
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RE: Metco p
Hi Rich
to the Surface Engineering Forum.
I won't , but you have got a bit of history there. The Type-P ThermoSpray gun was first introduced in 1956.
Quote:it won’t work with today’s powders
Well that statement is not true.
Getting hold of a manual maybe tricky, shame you didn’t get one with the gun. You never know, one of our members may still have access to one.
To be honest though, you may be able to get it to work fine and produce good coatings, but without access to consumable parts and spares its use will be severely limited.
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10-20-2012, 03:09 AM,
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MREMERSON
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RE: Metco p
Gordon
I got it working today, I had a spare powder nozzle which I changed out but, I can’t seem to get enough powder to spray, I have a 2 prong plug on the bottom of the gun but don’t have the cord, it looks like it operates some sort of solenoid, does this have something to do with powder feeding the flame?
I sprayed a piece of steel but after it cooled, the material just chipped off.Can you give any helpful hints?
Thank You
Rich
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10-25-2012, 02:56 AM,
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MREMERSON
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RE: Metco p
Kev
Thank you for the advise, im going to try the gun again tomarow, this time i have the vibrator working but the powder has been in it for a long time, i will purchase new.
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10-26-2012, 01:06 PM,
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MREMERSON
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RE: Metco p
Thanks everyone
All your inputs have helped me and the gun is working fine but, being so new to this, I tried to spray a small piece of round stock, I had the piece very hot but after spraying, it just cracked and fell off the piece, I will say I didn’t blast the piece nor did I clean it of any contamination. Is there any info on step by step thermal spraying? I am an auto body man for 30 years and this is a little different than spraying cars.
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10-27-2012, 05:06 AM,
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Gordon
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RE: Metco p
Hi Rich
Some good advice in these posts. Glad to see an old piece of equipment like this being put to good use, even if only to give a good introduction to thermal spray. I know a some people who have been thermal spraying for years (I'm talking about those that only stand outside the booths while robots do the spraying) would benefit from playing with a gun like this
I would always recommend grit blasting, and note grit, not shot or bead blasting. If those facilities are not available then you could try a nickel/aluminium bond coat powder like Metco 450 or 480 as a base for top coat. This is very often advisable even with grit blasting. Some of the so called "one step coatings" or "self-bonding" powders like 442 and 447 can stick to smooth surfaces. But really, if you take thermal spraying seriously, get yourself some grit blasting facilities. Remember thermal spray should be a cold process relative to the substrate (start at ~100 oC preheat and keep below 200 oC in most cases) that your spraying, this means the gun needs to move quickly over the surface applying coating in very thin consecutive layers.
Must stress health and safety. Don't breath the fumes/dust and be aware of the dangers of oxygen and acetylene.
Good luck and enjoy.
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10-28-2012, 02:04 AM,
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MREMERSON
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RE: Metco p
Hi Gordon
I took your advise as i tried the gun but i had problems, as i was spraying, the gun felt hot and then hotter where i had to shut down, at that point the plastic powder tube melted and so did some o rings.
I repaired everything except the powder shut off nozzel which melted and i need to find another, if you have any info on where to get one, it would be great. What went wrong? I know the o rings in the head were worn and i now replace them along with all others, i fired the gun up again and it never overheated.
Thank You
Rich
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10-28-2012, 04:00 AM,
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Gordon
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RE: Metco p
Hi Rich
Yes, I think you have learnt one lesson, don't skimp on o-rings. If they don't seal properly the gun will back-fire, which can cause damage.
I'm not sure if the later Metco 5P-II rubber tubes are the same or compatible. Sulzer Metco or possibly a non-OEM supplier could help with those.
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10-31-2012, 02:41 PM,
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MREMERSON
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RE: Metco p
Unfortunately not, im sure that would make a big difference.
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