Darryl Keil Last Activity 2025-09-09 11:09 AM
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CarlMorrell

Posts: 28

Joined: 2010-01-29

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Subject : veneering a curved enclosure
Posted : 2010-01-29 8:41 PM
Post #35889
It's been a long time, but I am ready to get back to some fun hobbies, and what fun would it be, if I wasn't trying something new?

I am planning a subwoofer. Curved top, such as a cathedral radio. 18" wide, 12" deep, 27" tall. Internally braced. I would like to use a single two ply to create the illusion of a one piece side and top.

Ok so is my bracing enough to survive a vacuum bag? Do I need to get a bladder? Can I save the $100 for the bladder and do internal bracing? Make my own bladder.

Design done with google sketchup. Pretty good tool. And a lot of help in visualizing this project!

Darryl, what would you do?

TIA, Carl
Attached file : combined.jpg (47KB - 124 downloads)



 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: veneering a curved enclosure
Posted : 2010-01-30 8:55 AM
Post #35891 - In reply to #35889
Carl,

I would put one more horizontal brace shelf between the bottom and the one at the radius point.

I am assuming that you will use 2 sheets of 3/8" bending ply over the radius. You want a total of 3/4" as you only have one arched brace in the middle.

Darryl Keil


 
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CarlMorrell

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Joined: 2010-01-29

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Subject : RE: veneering a curved enclosure
Posted : 2010-01-30 1:16 PM
Post #35892 - In reply to #35891
Are you suggesting only one more horizontal brace that is permanent?

Yes the top was going to be formed with 2 x 3/8" pieces of bending ply (luan?) with a veneer in between to add an extra glue line. Front and back are going to be 2 x 3/4". I know I will put backer veneer on the front, back and side. Do you think I would need to also do that for the top? That's my plan so far.

So do you think I could use temporary bracing? Additional bracing in the final product affects volume. Right now I am 2.05 ft^3. Adding braces, I will have to increase a dimension. No problem right now since I have not cut anything.

If I was to go with temporary bracing. Could I wedge in pieces of Styrofoam? I lent out my veneering video many years ago.

Thanks for your input Darryl,

Regards, Carl


 
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CarlMorrell

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Joined: 2010-01-29

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Subject : RE: veneering a curved enclosure
Posted : 2010-01-30 7:07 PM
Post #35894 - In reply to #35891
I added a top brace, based on the brace at the radius. Also added a brace half way down. Still over 2 ft^3.

Comments & Criticisms!

Carl
Attached file : combined.jpg (48KB - 79 downloads)



 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: veneering a curved enclosure
Posted : 2010-02-02 3:35 PM
Post #35903 - In reply to #35894
Carl,

I think you are fine now but you will still need to temporarily close up the openings in the front and back so the bag will not suck into these areas. The big one in the back will need some bracing behind it as well.

Darryl Keil


 
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CarlMorrell

Posts: 28

Joined: 2010-01-29

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Subject : RE: veneering a curved enclosure
Posted : 2010-02-02 9:16 PM
Post #35908 - In reply to #35903
Thanks Darryl,

Yes I was planning on making fitted inserts.


 
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Brent Longtin

Posts: 37

Joined: 2007-10-09
Location: Natick, MA

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Subject : RE: veneering a curved enclosure
Posted : 2010-03-03 12:25 AM
Post #35951 - In reply to #35889
I had to veneer the curved apron for a Chippendale pier table a few months back. Try as I might I couldn't get the vacuum bag to seal with the apron inside. Instead I pressed the veneer with hand clamps and a piece of 1/8" melame fiber board as the platten. Worked great.
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