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vaccuum veneers

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scuzzo84
Posted: Tue Sep 25, 2007 7:30 pm Reply with quote
Joined: 10 Nov 2005 Posts: 76
Ive been reading about people using a vacuum bag setup for making boards. Now I just want to confirm this, but is the whole vacuum method an alternative than using a hydraulic press? thanks
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slob-air
Posted: Tue Sep 25, 2007 8:37 pm Reply with quote
Site Admin Joined: 27 Oct 2001 Posts: 63453 Location: S&B HQ
Yes.

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scuzzo84
Posted: Wed Sep 26, 2007 4:07 pm Reply with quote
Joined: 10 Nov 2005 Posts: 76
in the examples that I read about, they uses plywood, and another example they used on a small amount of veneers like 3-4.

Could I use this vacuum method for basic 7ply popsicle decks?

Does anyone know the total cost of a basic setup?
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yoyo
Posted: Wed Sep 26, 2007 5:16 pm Reply with quote
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Joined: 27 Apr 2005 Posts: 2228 Location: Germany
Get some ideas here as well
http://www.joewoodworker.com/
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frokster
Posted: Mon Jun 02, 2008 9:34 am Reply with quote
Joined: 29 May 2008 Posts: 22 Location: Wevelgem, Belgium
This is what i think:

If you calculate the pressure you can get from a "diy" vacuumpress, it's way less then what the tech.-datasheet of most glues require.

0.9BAR (13 psi) of underpressure is a lot for any vacuumpress. Knowing that the atmospere has 1BAR (14.7 psi) that is the maximum that can be achieved (correct me if i'm wrong)
Woodglues require about 5 to 8 kg/cm�. That's 5 to 8 BAR or 70 to 110 psi.
Don't forget that bending the plies of wood also takes some of the force of the pressure.

It might look like a skate. And it might feel like a skate to most people who just ride it.

BUT CAN YOU MAKE A HIGH QUALITY SKATE with a vacuumpress?
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slob-air
Posted: Mon Jun 02, 2008 9:57 am Reply with quote
Site Admin Joined: 27 Oct 2001 Posts: 63453 Location: S&B HQ
Yes.

Roarrocket kits have become very popular. See the last Concrete Wave for info as www.roarrockit.com appears to be down.


Last edited by slob-air on Tue Jun 03, 2008 8:52 am; edited 1 time in total

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skinny
Posted: Mon Jun 02, 2008 1:13 pm Reply with quote
Joined: 12 Sep 2004 Posts: 2706
my pump generates 24ng @ 5500feet elevation. The answer is yes you can.
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frokster
Posted: Tue Jun 03, 2008 12:06 am Reply with quote
Joined: 29 May 2008 Posts: 22 Location: Wevelgem, Belgium
skinny wrote:
my pump generates 24ng @ 5500feet elevation. The answer is yes you can.


What's ng ? 24ng, how many psi or bar is that ?
I want to believe !
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yoyo
Posted: Tue Jun 03, 2008 5:26 am Reply with quote
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Joined: 27 Apr 2005 Posts: 2228 Location: Germany
slob-air wrote:
Yes.

Roarrocket kits have become very popular. See the last Concrete Wave for info as www.roarrockit.com appears to be down.


Slobmaster! Here is the correct and working link: http://www.roarockit.com/
Nevermind..................
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mosu101
Posted: Tue Jun 03, 2008 7:05 am Reply with quote
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Joined: 08 Aug 2006 Posts: 5086 Location: Australia
24ng is that 24 Hg as in 24 inchs of mercury???

just a guess (hugh pressure if it is 24 inchs of mercury)

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