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Posted: 4/29/2024 4:33:22 PM EDT
wondering if I can bake a part at 200 degrees for 40 minutes instead of 400 degrees for 20.
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Posted: 4/29/2024 4:50:26 PM EDT
[#1]
No. 200 degrees won't melt the powder.
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Posted: 4/29/2024 5:57:23 PM EDT
[#2]
Quote HistoryOriginally Posted By OneMoreAR: No. 200 degrees won't melt the powder. My issue is my over is quite tall (it's an old warming oven) and the element is in the bottom. If I powder coat something that hangs close to the element it's getting hotter than 400 degrees. I have 2 baffles over the element with an air gap between them but I've had a couple of things that came out looking very rough on the part close to the element. I can work around the sissy bar I just did but I'll need to come up with a permanent solution. this is my set up. 
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Posted: 4/29/2024 6:36:18 PM EDT
[Last Edit: Black88iroc]
[#3]
I wonder if you switch to PID SSR controlled, preheat then let the PID flash the elements, if that would lessen the radiant heat. My elements never turn orange once to temp. Also look at low cfm high temp blowers from Dayton. You'll want to stay around 2 turns of the internal volume to not disturb the powder.
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Posted: 4/29/2024 7:15:42 PM EDT
[Last Edit: Muricha]
[#4]
Unless there is some newer technology I’m not aware of,
Single phase |
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Posted: 4/29/2024 8:54:33 PM EDT
[#5]
Quote HistoryOriginally Posted By Black88iroc: I wonder if you switch to PID SSR controlled, preheat then let the PID flash the elements, if that would lessen the radiant heat. My elements never turn orange once to temp. Also look at low cfm high temp blowers from Dayton. You'll want to stay around 2 turns of the internal volume to not disturb the powder. |
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USA
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Posted: 4/29/2024 9:13:24 PM EDT
[#6]
Too high of cfm on the blower may cause issues blowing on the uncured powder. My oven is 35cuft, we went with a 70cfm blower to turn over the air twice. Probably could have gone more as we added some louvers. You can hardly tell it's blowing but the temps won't stay even top to bottom without it.
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Posted: 4/30/2024 8:32:51 AM EDT
[#7]
Quote HistoryOriginally Posted By Black88iroc: Too high of cfm on the blower may cause issues blowing on the uncured powder. My oven is 35cuft, we went with a 70cfm blower to turn over the air twice. Probably could have gone more as we added some louvers. You can hardly tell it's blowing but the temps won't stay even top to bottom without it. there is a fan I believe in the top but I don't know if it works or which direction it moves the air. I'll dig in to it. |
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