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Mobius_Strip
Distant Relative
Registered: 03/11/05
Posts: 322
Loc: Spangladesh
Last seen: 17 years, 8 months
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Brainstorming and advice on glovebox design
#4404086 - 07/14/05 02:27 PM (18 years, 8 months ago) |
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I know there's another glovebox thread but I didn't want to hijack it with specifics about my own.
This is my glovebox. It's made of 1/2" baltic birch with 1/4" plexi windows on the front and top for visibility. Prisoner already gave me some good advice regarding what finish to use but I'm kind of stuck on whether to make it positive or negative pressure. I definitely want simplicity, economy and conservation of time and money. As for the arm/glove-holes they are marked for cutting and I'll use the same system Hippie Chick used on hers. After I seal the inside with epoxy paint I'll silicone the interior joints. The attached box on the left is a double door staging chamber where things pass through and can be sterilized (using lysol, bleach or otherwise) before entering the glove box.
1. Any remarks on neg/pos pressure and thoughts on why it should be one over the other?
I'm thinking of using NIOSH mask filters and making it a neg pressure box utilizing the same glove system hippie uses. This seems the most simple as it only requires attaching the mask filters via a small hole and a blower/fan to suck air out of the box...althogh, what kind of "blower" sucks air as apposed to blowing air? Don't they usually all blow through the vent that attaches to the chassis? Are blowers reversable?
My other idea is to make it a pos pressure box using a small HEPA filter, blower and arm ports where the gloves are not attached and the air escapes around the inserted arms. This allows for the most hand freedom but my hesitation with this is that I'm not sure how to attach the blower/filter assembly without adding another plywood box making this thing almost too heavy to lift. Not to mention my access to a shop has become limited of late.
Basically, I've already put a lot of time into this and I don't want to F*ck it up. I also have no experience with blower motors and filters so I feel the need for a little hand holding in this regard. I want to do this right and make it as effective as I possibly can for all applications regaring mushrooms and cultures, etc...
I appreciate any ideas you experienced folks might have.
-------------------- The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum - even encourage the more critical and dissident views. That gives people the sense that there's free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate -Noam Chomsky
Edited by Mobius_Strip (07/14/05 03:44 PM)
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Prisoner#1
Even Dumber ThanAdvertized!
Registered: 01/22/03
Posts: 193,665
Loc: Pvt. Pubfag NutSuck
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Re: Brainstorming and advice on glovebox design [Re: Mobius_Strip]
#4404234 - 07/14/05 03:04 PM (18 years, 8 months ago) |
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Quote:
Mobius_Strip said: 1. Any remarks on neg/pos pressure and thoughts on why it should be one over the other?
based on your design, I recomend a positive pressure box, that way you dont pull spores in through the pass through, take an extra step and plug a misty mate nozzle through a 1/4 inch hole the thing and you can spray a disinfectant before you bring supplys into the glove box, be generous with silicone
tips for the epoxy, dont use any silicone before you apply the epoxy, you'll have problems with the epoxy bonding, remove anything that may need to be replaced like plexiglass or filters, hinges as well. Get a couple of plastic bondo spreaders and mix about a pint of epoxy (buy one with a 3 minute set time), pour it in most accessible opening and spread it every where inside the boxes, flip it around how ever you need to to make sure the stuff is one monolithic skin, and work it in those corners with the bondo spreaders. coat everything inside and out and you'll never have to worry about a contam.
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Mobius_Strip
Distant Relative
Registered: 03/11/05
Posts: 322
Loc: Spangladesh
Last seen: 17 years, 8 months
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Re: Brainstorming and advice on glovebox design [Re: Prisoner#1]
#4404421 - 07/14/05 03:38 PM (18 years, 8 months ago) |
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Are you talking about bonding epoxy, like glue, or epoxy finish like polyester coatings for boats? Is this a Homme' Depot item?
Spores...good point! I didn't think about spores being sucked out of the box. However, if the spores are capable of being sucked out then couldn't they also be blown out through pos pressure? Does a flow hood blow spores around?
Misty Mate? After looking it up I see that a misty mate is a personal cooling device (uses a water mist)... I'm assuming I would buy the whole system, drill a hole in the pass through and insert the nozzle into the hole to spray inside the staging chamber. What kind of disinfectant can I pump through the misty mate besides alcohol, peroxide maybe? Won't alcohol and most disinfectants degrade and destroy the plastics and rubber seals that the misty mate is made of?
Also, any ideas on how to attach a blower motor and filter without adding another plywood box? What kind of CFM do I need for a glove box? I'm assuming a shaded pole blower will work...
Thanks.
-------------------- The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum - even encourage the more critical and dissident views. That gives people the sense that there's free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate -Noam Chomsky
Edited by Mobius_Strip (07/14/05 03:42 PM)
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Prisoner#1
Even Dumber ThanAdvertized!
Registered: 01/22/03
Posts: 193,665
Loc: Pvt. Pubfag NutSuck
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Re: Brainstorming and advice on glovebox design [Re: Mobius_Strip]
#4404452 - 07/14/05 03:43 PM (18 years, 8 months ago) |
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Quote:
Mobius_Strip said: Spores...good point! I didn't think about spores being sucked out of the box
sucked into the box, mold spores and the like, with a negative pressure box it'll draw in air each time you open the doors if it's running, positive pressure will blow things out but mushroom spores are heavy enough and usualy clumped together so they arent a big worry, it little spores in the air, things like green mold
Quote:
Misty Mate? After looking it up I see that a misty mate is a personal cooling device (uses a water mist)...
yes
Quote:
Also, any ideas on how to attach a blower motor and filter without adding another plywood box? What kind of CFM do I need for a glove box? I'm assuming a shaded pole blower will work...
buy one with a flange, cut a hole for a filter and the blower and bolt it on the side, you dont need much velocity, 60-100 cfm it sufficient
http://cgi.ebay.com/ws/eBayISAPI.dll?Vie...bayphotohosting
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Mobius_Strip
Distant Relative
Registered: 03/11/05
Posts: 322
Loc: Spangladesh
Last seen: 17 years, 8 months
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Re: Brainstorming and advice on glovebox design [Re: Prisoner#1]
#4404468 - 07/14/05 03:47 PM (18 years, 8 months ago) |
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Oh, ok, I was thinking about the wrong spores, I get it! Yeah, that makes a lot of sense. Point taken. Positive pressure it shall be. Thanks.
-------------------- The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum - even encourage the more critical and dissident views. That gives people the sense that there's free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate -Noam Chomsky
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Prisoner#1
Even Dumber ThanAdvertized!
Registered: 01/22/03
Posts: 193,665
Loc: Pvt. Pubfag NutSuck
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Re: Brainstorming and advice on glovebox design [Re: Mobius_Strip]
#4404494 - 07/14/05 03:52 PM (18 years, 8 months ago) |
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Quote:
Mobius_Strip said: Are you talking about bonding epoxy, like glue, or epoxy finish like polyester coatings for boats? Is this a Homme' Depot item?
yes to both, look for top coatings for concrete, you may have to call around but home depot should carry it, you need something abrasion and chemical ersistant, concrete epoxies should work... I like clear because it shows off the work an it usualy has a longer working time
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Mobius_Strip
Distant Relative
Registered: 03/11/05
Posts: 322
Loc: Spangladesh
Last seen: 17 years, 8 months
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Re: Brainstorming and advice on glovebox design [Re: Prisoner#1]
#4404517 - 07/14/05 03:57 PM (18 years, 8 months ago) |
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"buy one with a flange, cut a hole for a filter and the blower and bolt it on the side"
Forgive me if I seem dense but I'm not following... I understand the part about buying a blower with a flange but in order to bolt the motor to the side of the box I need to make the hole smaller than the flange, correct?
So, where does the filter come in? I'm having a hard time visualizing this part.
Are you recommending that I attach the filter on the inside of the glove box covering the blower hole?
-------------------- The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum - even encourage the more critical and dissident views. That gives people the sense that there's free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate -Noam Chomsky
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Prisoner#1
Even Dumber ThanAdvertized!
Registered: 01/22/03
Posts: 193,665
Loc: Pvt. Pubfag NutSuck
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Re: Brainstorming and advice on glovebox design [Re: Mobius_Strip]
#4404989 - 07/14/05 06:04 PM (18 years, 8 months ago) |
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Quote:
Mobius_Strip said: So, where does the filter come in? I'm having a hard time visualizing this part.
you can use it as a push through or pull through filter, pushing would probably be better in your application, and since I dont know the specs of anything you have or will buy, I cant really do much for installation, since you built that I'm sure you could adapt something of this nature with a little silicone/weather stripping to work with your setup
I'd use a pre filter one th blowers intake and the hepa on the output
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Mobius_Strip
Distant Relative
Registered: 03/11/05
Posts: 322
Loc: Spangladesh
Last seen: 17 years, 8 months
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Re: Brainstorming and advice on glovebox design [Re: Prisoner#1]
#4405169 - 07/14/05 07:16 PM (18 years, 8 months ago) |
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Cool, Full of good suggestions, as usual. Hopefully I'll have this thing done by next week. Thanks again for your help pris, mucho appreciatto.
-------------------- The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum - even encourage the more critical and dissident views. That gives people the sense that there's free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate -Noam Chomsky
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Prisoner#1
Even Dumber ThanAdvertized!
Registered: 01/22/03
Posts: 193,665
Loc: Pvt. Pubfag NutSuck
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Re: Brainstorming and advice on glovebox design [Re: Mobius_Strip]
#4405365 - 07/14/05 07:51 PM (18 years, 8 months ago) |
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no sweat bro, it's the whole reason I'm here, to share my experiences with you so you dont end up wasting time, money and resources to excell in this hobby
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