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Long veneee layup

6/30/17       
Dan cook

Any suggestions for laying up raw wood veneer (2' x 12 l/f) without a vacuum. I don't want to buy a bag this long for one layup. I thought about using the dry glue method or hot hide glue but not sure how well these would work on raw wood veneer this big. Any suggestions?

7/1/17       #2: Long veneee layup ...
rich c.

Make your own bag.

http://www.joewoodworker.com/veneering/makingbags.htm

7/4/17       #3: Long veneee layup ...
Charles Wright  Member

Website: http://www.northcreekwoodworks.com

Why not find a local shop with a press and be done with it. If no one has a 12ft press, step pressing works fine.

7/6/17       #4: Long veneee layup ...
John S  Member

I agree with Charles. Why go through all the trouble of making a bag for a one shot deal. There are plenty of twelve foot hot presses around, and step pressing does work well if no one in your area has a twelve footer. Good luck!

7/7/17       #5: Long veneee layup ...
Jared

I agree the hot press is the way to go. However it's good to have options: if all else fails (and you already have a vacuum pump), go to your orange big box store and buy a roll of visqueen and a roll of butyl tape. You can make a single-use bag of whatever size and shape you need.

7/8/17       #6: Long veneee layup ...
David  Member

Website: dtwoodworker.houzz.com

Would someone explain step pressing and what that would look like on a 12 foot panel? I have an 8 and 10 foot vacuum bag. Thanks

7/8/17       #7: Long veneee layup ...
Charles Wright  Member

Website: http://www.northcreekwoodworks.com

If you have a 12 ft panel and a 8 ft press, you put glue on both sides of the panel, lay on the face and back veneer (or HPL), and put 8 ft of the sandwich into the press. Let it cycle for (example) 60 seconds at 180 deg. F,, open the press just enough to slide the remaining 4 ft in and cycle again. The key thing is to use a crosslinked PVA glue. It reheats well at the area of the step. I've used resin glue but it's risky as once it cures there is no reactivation. We have done panels up to 22 ft with no issues.

7/11/17       #8: Long veneee layup ...
Bill

I second the one time bag or hiring someone to do it.

7/13/20       #9: Long veneee layup ...
Walter Goodman Member

Does step pressing work with a cold press? I have a hydraulic cold press, 39" by 87", and want to press 56" by 74" for a table. I'm thinking to mask the area outside of the press, and remove the masking tape for gluing the next section.

7/14/20       #10: Long veneee layup ...
Charles Wright  Member

Website: http://www.northcreekwoodworks.com

Step cold pressing is risky, you might get either a glue lump or delam at the step mark. If you are using .5mm veneer, there is little to play with.
Depending on your press, you can cut 2 pcs of thick MDF to 57 x 75 as cauls. Glue the whole panel and side it in the press with 9" handing out on both sides. When you close the press, have a guy on each side clamp with panel that is hanging out. Some stiff hardwood boards under the clamps would help spread the pressure. I know that will work. Or find a guy with a 60" press.

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