A short vid of laminating using TAP bag

[Dave Bagwill]

I made a short vid, very basic on using the bag for laminating a back into a radius dish.

[John Link]

Very nice demo Dave. How is it they avoid the need to continuously remove air via pump?

What size bag for the back?

Looks like their 14 x 47 bag would work fine for sides.

[Dave Bagwill]

Hi John - Their bags are really built well, so as long as you have a good seal at the opening, they just plain don't leak. If you poke a hole in one by mistake , a piece of clear packing tape patches 'er up.

In discussions with their engineer, I think the 20x47 would be about right for the sides.

The bag in the vid is 28x26, I believe.

[Jim Ebert]

Nice tip Dave. I will be looking into this. I will tell them that you sent me. :)

[Dave Bagwill]

Jim - No need to name-drop, they treat everyone equally :-)

[John Link]

Dave,

I have all the parts to build a device that functions as a vacuum pump, but driven by my air compressor, that I have not yet assembled. What do you think I ought to do with it? That is, is there any procedure in guitar making that you think the heavy duty approach would be "better" for?

[Dave Bagwill]

John - the TAP bag will produce plenty of vacuum; however, if you are going to laminate sides as well, you will have to decide on what method to use.

It is best, according to the RR tech, if the bag is used in such a manner that it is pressing down on the laminates, which would be on the upper side of the bending form. I have almost always used the process in the pic attached, which might NOT be optimal for the TAP bag; if what is shown in the pic is your method of choice, or if you think you may want to use that method in the future, then the pump with the venturi valve might be the prudent choice.


OTOH, if you have a form that stands on its ends, and the laminates can be laid on the top of the form, then the TAP bag would be very efficient.

I hope that helps.

Norah at Roarockit will field any questions you have, or direct you to the tech.