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Discuss the different types of equipment needed for screen printing. Topics include manual screen printing presses, automatic presses, dryers, folding machines, starter kits and high end machines.



Vacuum blanket

 
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Old 6 Days Ago Jun 25, 2020 7:59:18 PM -   #1 (permalink)
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Default Vacuum blanket

Hello! I replaced an old vacuum blanket on a older atlas exposure unit. I kinda feel like I didn’t leave enough slack or I have leaks as it’s not sucking it down. I just now literally took off the old seal around it and gonna put a new one. I got a roll of rv foam seal stuff at Lowe’s to put on, my question is does it go in the metal over the screws only or does it go half way on metal and half on blanket? Thank you!!
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Old 6 Days Ago Jun 25, 2020 8:02:21 PM -   #2 (permalink)
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More pics that didn’t load right
 
Old 5 Days Ago Jun 26, 2020 2:21:00 PM -   #3 (permalink)
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Default Re: Vacuum blanket

Quote:
Originally Posted by CrusinSusan
my question is does it go in the metal over the screws only or does it go half way on metal and half on blanket?
It should go on the metal, but may have to seal the glass too
 
 
Old 4 Days Ago Jun 27, 2020 4:37:57 PM -   #4 (permalink)
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So on top of the screws you think? I’ve been looking at Lowe’s online for like 1-1 1/2 wide strip to kinda cover the screws and all the metal haha.. So you think ok top of screws or go thinner and maybe In front of them closer to glass? I ordered some felt tape stuff to replace the ones the glass is sitting in cause it looks pretty compacted. Seal the top of glass? Thank you so very much !! I’m lost lol!!
 
Old 4 Days Ago Jun 27, 2020 8:01:13 PM -   #5 (permalink)
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Default Re: Vacuum blanket

Quote:
Originally Posted by CrusinSusan
So you think ok top of screws or go thinner and maybe In front of them closer to glass?
It's hard to tell from the photo what type of screws these are, or where the glass ends.
I've never seen an exposure unit that doesn't seal directly over the glass, so I did a google search and found this https://www.reddit.com/r/SCREENPRINT...eeling_off_on/
Looks like you have the same type. There is no easy fix for this. I'd probably modify the frame, making it wider so I can use a regular seal.

Last edited by TABOB; 3 Days Ago at 02:24 PM..
 
Old 3 Days Ago Jun 28, 2020 12:07:16 PM -   #6 (permalink)
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Default Re: Vacuum blanket

seal then metal. slack or not it will form itself. when it goes bad do it all over again. you've reached a level many fear or are not willing to learn to do. well done
 
Old 3 Days Ago Jun 29, 2020 11:06:55 AM -   #7 (permalink)
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Sorry for the bad pics here’s more. The screws are the are hex head so they protrude a bit. I guess I could switch them all out with the pan head? When you guys say seal the glass would the felt be sufficient or I need to do like a bead of silicone around it? If that’s so I assume I have to scrape the caulk off to change A lightbulb or anything? Second if I put the stripping over the rubber and metal where yellow square is do you think it would pull on the stripping when the blanket gets tight? Thank you all for the help, this thing is driving me nuts lol!
 
Old 2 Days Ago Jun 29, 2020 1:44:30 PM -   #8 (permalink)
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Default Re: Vacuum blanket

The point is to make something that will last more than a couple of times. As shown in the link I've already posted, these have a moulded seal over the blanket. Probably dome on purpose to make repairs difficult.

I can think a number of alternative ways to fix this, but none of them is quick and easy.


How about sticking the seal directly on the glass? This should work, as it would seal when the blanket is lowered on top of it.
 
Old 2 Days Ago Jun 29, 2020 9:28:59 PM -   #9 (permalink)
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Gotcha, well I’m game for fixing it to work right in the long run. Dont need quick and easy 🙂 so whatever you got for an idea is welcome! I was thinking about getting another piece of the neoprene rubber (Taking the other off) and wrapping it up top on the frame? Use the metal strips to attach to top? And maybe fill the holes with sealant of some sort. I’ll seal the glass as well as you suggested. Actually as I just thought about it that probably wouldn’t work wrapping it cause the hinges on the back. Well there went that lol! I did get some pan head screws they won’t stick out as much as the hex head.
 
Old 2 Days Ago Jun 29, 2020 11:04:15 PM -   #10 (permalink)
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Default Re: Vacuum blanket

How about raising the glass so it can seal directly with the blanket?
This should work.
 






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