andrew-theasby
|
| posted on 26/4/10 at 07:59 PM |
|
|
cheapest simpliest quickest vaccuum pump
Looking for options and ideas for making/buying cheaply/hiring locally a vaccuum pump suitable for a couple of lay ups. If i can make one easily i
will, but from what ive found on google, a fridge pump could do short term, but dont know whether i need to look for anything particular. Any
suggestions or advice please?
|
|
|
|
|
rusty nuts
|
| posted on 26/4/10 at 08:07 PM |
|
|
Brake servo pump from a diesel could be adapted perhaps
|
|
|
liam.mccaffrey
|
| posted on 26/4/10 at 08:28 PM |
|
|
Have a word with 907, he offered me his when i enquired.
linky
Build Blog
Build Photo Album
|
|
|
iank
|
| posted on 26/4/10 at 08:32 PM |
|
|
ebay has lots
linky
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
|
|
|
andrew-theasby
|
| posted on 26/4/10 at 09:07 PM |
|
|
907's is a bit more than i was looking at at the mo, but that one on ebay- will that do any good? I have a small airbrush compressor which i
reversed the valves on, but it doesnt pull much vaccuum, and i dont fancy leaving it on all day!
|
|
|
prawnabie
|
| posted on 26/4/10 at 09:08 PM |
|
|
Will something like a mityvac work?
|
|
|
iank
|
| posted on 26/4/10 at 09:21 PM |
|
|
quote:
Originally posted by andrew-theasby
907's is a bit more than i was looking at at the mo, but that one on ebay- will that do any good? I have a small airbrush compressor which i
reversed the valves on, but it doesnt pull much vaccuum, and i dont fancy leaving it on all day!
Here are the specs (no idea if they're what you need for layup).
http://www.medibix.com/detail.jsp?view=detail&sku_id=842507&product_id=452859
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
|
|
|
andrew-theasby
|
| posted on 26/4/10 at 09:36 PM |
|
|
Im not sure what i need either, was hoping for some advice
|
|
|
dave r
|
| posted on 27/4/10 at 05:47 AM |
|
|
fridge compressor
|
|
|
britishtrident
|
| posted on 2/5/10 at 03:14 PM |
|
|
Thinking out of the box on this you can get about 19 inches of mercury by tapping into a petrol engine inlet manifold.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
andrew-theasby
|
| posted on 2/5/10 at 03:35 PM |
|
|
Just bought a fridge pump, so going to give that a go for now, thanks
|
|
|
NS Dev
|
| posted on 2/5/10 at 09:02 PM |
|
|
can do it with a vacuum cleaner, though it needs to be a healthy one!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
|
|
|
Neville Jones
|
| posted on 3/5/10 at 09:29 AM |
|
|
Go Carefully with a vacuum on wet layup, it's very easy to pull the resin out, and end up with a lot of voids. You don't need as much
vacuum as a shop vac will pull, so an industrial vacuum cleaner will do the job more than enough. Even a household vac cleaner will do the job, but
will burn out without air flow through it. Bleed a bit of air into the suction tube to regulate the vacuum.
If using prepreg, then you need as much pressure as you can get on the layup. Only an autoclave can do that.
Cheers,
Nev.
[Edited on 3/5/10 by Neville Jones]
|
|
|
2cv
|
| posted on 3/5/10 at 07:27 PM |
|
|
I would just add that if you are intending using you vacuum pump a second time, it is a good idea to put a condenser in the line to trap out any resin
that might be pulled over.
|
|
|
andrew-theasby
|
| posted on 3/5/10 at 10:44 PM |
|
|
Ok, thanks for the tips, ill post my results when im done for anyone else who might find it useful. How much vacuum (on a gague) do you suggest it
should be set to for a wet lay up? Im just watching a few gauges on ebay at the mo. Thanks
|
|
|
Neville Jones
|
| posted on 4/5/10 at 09:22 AM |
|
|
What resin system are you using? It makes a difference.
Cheers,
Nev.
|
|
|
andrew-theasby
|
| posted on 4/5/10 at 09:24 PM |
|
|
At the moment just having a play with fibre glass and polyester resin
|
|
|
Neville Jones
|
| posted on 5/5/10 at 09:13 AM |
|
|
Poly resin only needs the faintest of vacuum, as any more pulls out the styrene, which can cause bubbles in the layup.
You only need anough vacuum to pull out the air.
Cheers,
Nev.
|
|
|
andrew-theasby
|
| posted on 5/5/10 at 05:53 PM |
|
|
Oh right, maybe my airbrush compressor would have done if id have sealed it up properly then. I can lay it up with a roller, so really only want the
vacuum to pull it to the mould, so might try this. Thanks
|
|
|
.jpg)
