TSB
screen printing => Waterbase and Discharge => Topic started by: TCT on October 01, 2015, 06:25:08 PM
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So, had this idea today while I was sobbing over not winning the powerball last night....
It always seems like such a pain to dispense WB/DC/HSA bases and whites(first world problems I know). Got to thinking, what if we were to take a 5gal pail and put a spout like the pic below, in the bottom. Our pails are on shelves anyway so they wouldn't be on the ground. Anyway, put the spout in the bottom side, and then in the lid attach a drop from our air lines. We would put a cheep harbor freight regulator maybe even a shut off in before the pail, and drop the pressure to 10psi, 20psi or whatever.
Think it would work????
(http://images.tapatalk-cdn.com/15/10/01/4de48ceba864cb0f5b8536ada4420399.jpg)
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Maybe, but how would you stir before dispensing?
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I`m pretty certain that won`t work very well. But of course I might be wrong.
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CCI comes with bung holes (yep) in the lid. I'd assume these can be used somehow. Probably as simple
as a bucket tilter like I've seen for emulsion.
I'd be very nervous about pressurizing a fiver with a dispenser below liquid level. A leak could be
disastrous. CCI base would move, but I doubt their white would.
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Why not just get a high viscosity quart hand pump to put in the top of the bucket.
Wouldn't press up a pail, blow the lid off.
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^^I get the feeling it wouldn't take much to pop the top, compared to what you'd need to dispense.
Some sloppy math says you'd be putting around 110-220 pounds of pressure on the inside of the lid if you pressurized to 10-20 PSI.
Then again, duct tape and a paint shaker could fix the issues you're looking at. ;)
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Just a FYI 2 psi is all they use to test tanks. Seen 55 gallon steel drums blow the lids at 20 psi.
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OK, OK, so not ALL my ideas are winners!
Proceed as if this don't happen.... :'(
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I'd give it a shot, whats the worse that could happen, 5 gallons of base everywhere? But not a bad idea IMO.
My crazy idea that worked but didn't help much: We got real tired of adding wb ink to screens on long runs doing jumbo prints with lots of coverage. So we saved a bunch of hand pumps like the ones on the Orange Gojo (sp) hand cleaner. These were big enough in diameter to never clog. Taped them to the head at just the right point so the head hit the plunger when it printed. Added some clear line to the hand pump to drop into a 5 gallon bucket ink through the opening on top of the 5, sealed with tape and put the 5 next to the head. It took some fine tuning, but with the line primed we could put a drop of ink on the screen right in front of the squeegee, this really helped keep discharge color consistent along with ink dams. However, overnight the ink would gum up the hand pump so they needed to be cleaned at the end of the night, not impossible, but whatever labor we saved on the pumps was lost on clean up and setting up again the next day. When we ran 24/7 and didn't stop the presses it was worth the effort.
Al
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I'd give it a shot, whats the worse that could happen, 5 gallons of base everywhere? But not a bad idea IMO.
My crazy idea that worked but didn't help much: We got real tired of adding wb ink to screens on long runs doing jumbo prints with lots of coverage. So we saved a bunch of hand pumps like the ones on the Orange Gojo (sp) hand cleaner. These were big enough in diameter to never clog. Taped them to the head at just the right point so the head hit the plunger when it printed. Added some clear line to the hand pump to drop into a 5 gallon bucket ink through the opening on top of the 5, sealed with tape and put the 5 next to the head. It took some fine tuning, but with the line primed we could put a drop of ink on the screen right in front of the squeegee, this really helped keep discharge color consistent along with ink dams. However, overnight the ink would gum up the hand pump so they needed to be cleaned at the end of the night, not impossible, but whatever labor we saved on the pumps was lost on clean up and setting up again the next day. When we ran 24/7 and didn't stop the presses it was worth the effort.
Al
That a really smart idea.