a trick for tumble powder coating

[Maximumbob54]

There is no "black magic" - only a lack of knowledge and/or understanding.

kill·joy/ˈkilˌjoi/

noun a person who deliberately spoils the enjoyment of others through resentful or overly sober behavior.

[62chevy]

kill·joy/ˈkilˌjoi/

noun a person who deliberately spoils the enjoyment of others through resentful or overly sober behavior.

LOL !!! One must have a little humor in their life.

[Point452]

This has been a great thread! Here in humid N. Texas, I've had great success with the airsoft BB, #5 container, HF red. I think the static accumulates on the lead better when the humidity is relatively low. The air soft BB method works well on the 1st try on low humidity days, but with elevated humidity, I've only had success only when I preheated my boolits to ~200*F for the BB powdercoat, or shake/bake a partial coat, then re-shake/bake for full coverage. With the humidity so variable here, It is faster for me to preheat, then shake/bake hot boolits.

[Jaymo]

I wonder if a stun gun could be used to induce as stronger static charge to the BBs/booklets, for better "cling"?

[bangerjim]

I wonder if a stun gun could be used to induce as stronger static charge to the BBs/booklets, for better "cling"?

Or just use the ESPC gun like the stuff was engineered to be applied. In high humidity climates, I would imagine the shake-n-roll DT tub system could be a bit sketchy due to low static. Here in AZ we are in our "monsoon season" now and DP's run from 55-70. I have not tried BBDT in higher DP's the past several days, just use my ESPC gun.

If you have a stunner, try it and let us know if it makes any difference. Enquiring minds MUST know!

banger

[ebner glocken]

You start to notice the method declining above 70% humidity. Anything above 85% and it declines RAPIDLY. Then it's time for steel bbs and the vibrator and of course ESPC. I just loaded up some .454 casull PC today. Hopefully video will be coming soon.

Ebner

[crashguy]

I'll add my experience with DTPC.. I have tried the methods with copper bbs and with no bbs at all. Both were in a cool whip container and shaken and swirled. In another thread , "powder fatigue" was discussed with HF red . I noticed the coverage with HF red to taper off after a batch or 2, even though there was powder in the container ..adding fresh powder corrected the poor coating.

[snuffy]

I'm certainly no electrician, or a physicist, I failed every math class above basic arithmetic. But isn't static electricity different from AC or DC power?

When I gather the funds, I'm going to try something. It was mentioned above, and is where my thinking was leading me. Charging the powder cloud inside a plastic container with static elec. Pure static electricity,(SE). From a device like this;

http://www.amazon.com/gp/product/B00...&pf_rd_i=typ01

I don't think it would take very much of this pure SE to coat quite a few boolits. A liner of foil on the bottom connected to one lead of the generator, the other suspended above the boolits and powder. I don't think it would matter if there was airsoft BB's in with them or not. The function of the bb's was to generate SE by rubbing on the #5 plastic.

I too have had failure to coat by the #5 plastic bowl, airsoft white or black Crossman bb's, and HF red. I went with a midway tumbler, black bb's and the same HF red. That worked much better. My central air keeps the humidity level low, so I don't think that's a concern.

[bangerjim]

As you can see from the posts that DO list locations (!), the humid locations are having problems this summer. Here in AZ, even though we call it humid, it is still very dry compared to back east and down south. I did a small batch in my back shop which has an A/C, right after a dumper of a rainstorm last night and, in my small Zip-Lok #5 screw-on lid containers, red and blue still work perfectly with BBDT. And it was NOT fresh powder. I do not buy into the "worn out" powder idea. I have never seen it in all the times I have used BBDT. I can use the powder down till there is absolutely ZERO left in the container and it still coats.....until it is ALL gone. Then I add more.

Hope you guys figure out something to beat the humidity and no-static until fall rolls around! The ESPC gun is definitely a viable alternative.....I have never had it fail. But I have not tried it in a swamp or a rainstorm.

bangerjim

[Beagle333]

That's a pretty fancy machine, Snuffy. I'd like to see it doing its thing!

It's not a big stretch for me to go back to compressor and HF gun on days tumble won't take.
Only takes one more trip down the stairs.

[snuffy]

Lot of $$ for a VandeGraff machine. Make your own.

Uh huh, now justt how do you do that? I can build just about anything, just need plans, or a pattern.

[bangerjim]

Lot of $$ for a VandeGraff machine. Make your own.

It is NOT a VandeGraff machine, it is a Wimhurst Influence Machine. I have one of these ( and a VandeGraff as well!) that was made back in 1845 and, hooked up to some good Leyden jars, it will knock you on your keister...........and across the room!!!!!! Nothing to play with. Ben Franklin almost killed himself with one of those. I doubt if that little toy can generate like that, but is will give a zap.

Let's see if the site graphic upload engine is working today:

Attachment 112644
My machine.

Scientists back in the early days of electricity and medicine used those machines for experiments and "quack" medicinal cures.

You would still be better off buying a Harbor Freight ESPC gun and taking the high tension circuitry out and using that. It is on sale right now for ~$65 and they always have those 20% coupons floating around!

(PS My machine has been valued at over $2,000.)

bangerjim

[bangerjim]

Uh huh, now justt how do you do that? I can build just about anything, just need plans, or a pattern.

I built one and there are a LOT of parts to the thing!


Tons of brass balls to turn. No-lead 1/4" glass disks to find. Many lathe-turned brass parts. I spend many hours making one!

Here is some info:


bangerjim

[Jaymo]

Well, here in GA the humidity is high.
I broke down and bought the HF ES gun this weekend.
On sale for $65 minus the 20% coupon.
Also got some coarse walnut media and another vibratory polisher.
Figured I'll try DTC some in the vibratory polisher.
If it works, great.
If not, I'll use the ES gun.
I can always use another vibe shiner for brass.
Keep the .223/.444 & the .38.45 separate.
Keeps from having the smaller brass get stuck in the bigger brass.

[Beagle333]

You'll like the gun. It sure makes a good coat, no matter the conditions.

[ProfGAB101]

Brain dead question since I'm at home and out of coffee

On the AL no stick foil - shiny side up or dull side up?

I have everything on hand, but the humidity is uber high ( for CO norms ) for the last few days and I'm waiting for a normal August scorcher to toast me up some test samples.

[Beagle333]

Non stick foil actually says "Non Stick Side" on the side you should use.



(and it is the dull side, btw)

[w0fms]

Wrong type of airsofts, 78% humidity, no forceps.. but the right type of round #5 plastic ("Ziploc") bowl...

Bottom Row.. top row two coats, ESPC. I think we have a winner for pistol here, boys...

[Jaymo]

Wifey bought a couple tubs of Aldi brand whipped topping in #5 (PP) tubs, just for me to use for PC.
The munchkins can eat the whipped grease on their ice cream.
I'll wash the tubs and use them for shake 'n bake.
Can't wait to try out the HF ES PC gun.
I'm looking for other small items to PC.

BTW, Lyman Devastator HPs look amazing in wet black

[snuffy]

[QUOTE=bangerjim;2880261]I built one and there are a LOT of parts to the thing!


Tons of brass balls to turn. No-lead 1/4" glass disks to find. Many lathe-turned brass parts. I spend many hours making one!

Here is some info:


bangerjim[/QUOE]

Here's a guy that has several wimshurst ES you tube building vids. he gets some pretty impressive sparks from it.

https://www.youtube.com/watch?v=SGASVWJPXNo

As for the HF gun, the cost is about what I would pay for a wimshurst machine from amazon. I'd just use the ES generator from the gun, I don't have a compressor OR the room/place tp spray anything. THEN IF I would ever win the lottery I would build a house with a spray booth! So I could then use the gun.