sem metal flake

danp76

danp76

Oldtimer
Hi guys I need to spray some blue metal flake on a project. It's made by Sem, it's relatively course, what size nozzle/needle would you suggest? I'm going to mix it spi intercoat clear.
 
unsure on sem, but i've used some roth flake which I assume to be similar and I used a 1.8 in the intercoat, it settles fast though, keep shaking the gun.
 
Back in my childhood I shot a bit of Metalflake. What worked the best for me at the time was an old Crown siphon gun I was given. I have no idea tip or cap size, it worked fine for the flake.
To eliminate the shaking the cup or forgetting to shake the cup I added an air agitator.
It was nothing more than a piece of copper tubing ran thru a hole in the lid of the cup and into the paint.
I had a number of variations to it before I settled on a design.
the end result was the copper tube extended down to the bottom of the cup and was formed into a 270 degree portion of a circle with a diameter that allowed it to be positioned in the lowest area of the cup.
The base of the cup was concave.
I pinched shut and soldered the end of the tube and drilled a number of 1/16 holes in the tube.
I tee'd off of the air supply and used a little needle valve in line to the copper tube to regulate the air into the cup.
The atmospheric vent needed to be enlarged to 1/8" inch to allow the mixing air to escape the cup without pressurizing it.
this setup worked quite well.

I have no idea what ever happened to this gun, it was left at home when I got out of hi school and went out on my own. dad probably tossed it out, lol.

Does anyone remember a Crown gun? It is the only one I ever saw. It was from 1960 or so.
 
i have always just used my iwata with a 1.4. that will do all medium - normal size flake. if its super coarse then thats a different story. i have a sem color book and while i am not looking at it now i believe all their flakes are a normal size.
 
Thanks guys, Jim I think it's pretty much normal flake, Sem Color Horizons flakes. I plan on mixing intercoat 1:1 with reducer with a splash of clear activator and adding flake to the mix to desired appearance. Thanks again, I'll give it a try!
 
siphon gun with tri5 wheel bearings inside :) the one complaint i have on gravity guns is you cant use bearings to keep it mixed.
 
They are most likely polyester flakes. Which are very light and take much longer to settle than the older style of flakes from years back.

If your using a gravity feed gun, and are concerned with settling, place your finger tightly on the aircap of the gun, trying to plug up the air holes. Lightly pull the trigger. You will release air through the atomizing and fan circuits and your finger being there will force it up back through the fluid circuit. It takes some practice, and be careful, do not look into the cup while doing this. If you dont have a screw on lid, you can blow the lid off and splatter paint on the dog.

Once you get it down, it works great.
 
327amc;16353 said:
They are most likely polyester flakes. Which are very light and take much longer to settle than the older style of flakes from years back.

If your using a gravity feed gun, and are concerned with settling, place your finger tightly on the aircap of the gun, trying to plug up the air holes. Lightly pull the trigger. You will release air through the atomizing and fan circuits and your finger being there will force it up back through the fluid circuit. It takes some practice, and be careful, do not look into the cup while doing this. If you dont have a screw on lid, you can blow the lid off and splatter paint on the dog.

Once you get it down, it works great.
Click to expand...

Same trick worked great with my JGA-502 :)
 
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