Author Topic: Plywood laminations  (Read 1825 times)

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Offline VW MICK

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Plywood laminations
« on: August 30, 2017, 02:38 AM »
Hi guys

Some advice needed

I have been asked by a friend to build some bench seating. It will be made from birch faced ply
The two end cheeks I would like to  relaminate the ply into a slab of end grain
Has anyone done this ?
Any tips links/advice would be appreciated

I don't have a thicknesser or drum sander. So the alignment of the strips is my main concern as to keep it as flat as possible

Thanks Mick


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Offline SRSemenza

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Re: Plywood laminations
« Reply #1 on: August 30, 2017, 09:31 AM »
I am not picturing this. Do you mean you want separate the laminations and somehow interlock them with another piece?

Seth

Offline GarryMartin

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Re: Plywood laminations
« Reply #2 on: August 30, 2017, 09:40 AM »
I think he means he wants the "end grain" of the ply to be visible in the whole of the end panel as if loads of sheets were stacked on top of one another. There's a drawer on a CMS storage unit somewhere on the FOG; I'll see if I can find it.

It was @bkharman in http://festoolownersgroup.com/member-projects/cms-shop-cabinet/

Is that what you mean @VW MICK?

« Last Edit: August 30, 2017, 09:46 AM by GarryMartin »

Offline SRSemenza

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Re: Plywood laminations
« Reply #3 on: August 30, 2017, 10:21 AM »
Aah, yup, got it.   That will be a cool looking bench.

Seth

Offline GarryMartin

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Re: Plywood laminations
« Reply #4 on: August 30, 2017, 10:41 AM »
I guess so long as it's not a structural element, or the multiple laminations are strengthened somehow (threaded rods?) then it should be fine, and as you say, would look cool.

Offline VW MICK

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Re: Plywood laminations
« Reply #5 on: August 30, 2017, 02:48 PM »
Yes

That's the idea. Do you think it will be week ?

All the edges are going to be doubled up to 36mm

The plan so far is to rip full lengths of a 2440 sheet at 36mm as I think this will be more consistent
Then cut to length. Glue and screw together in two's then four's maybe then domino into eight's. I need about 33 to make a 600 panel

I might try and document this build as It could be interesting to other members

Mick


Offline pixelated

  • Posts: 67
Re: Plywood laminations
« Reply #6 on: August 31, 2017, 09:38 AM »
If you use a good glue and clamp it well, I don't think there will be a weakness problem.
Back in college some friends made some furniture from corrugated cardboard glued up in a similar sort of way, the resulting pieces were very sturdy (and heavy).

Offline Bert Vanderveen

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Re: Plywood laminations
« Reply #7 on: August 31, 2017, 03:02 PM »
What kind of is a bummer for me when laminating two pieces of ply this way is that the seam will be visible, on account of the outer layers duplicating there. If I were to do this I would plane one layer of ply off one piece, so there'd be the 'usual' uneven number of layers.

I know, it's somewhat OCD...
Cheers, Bert Vanderveen

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Offline Kev

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Re: Plywood laminations
« Reply #8 on: August 31, 2017, 05:58 PM »
What kind of is a bummer for me when laminating two pieces of ply this way is that the seam will be visible, on account of the outer layers duplicating there. If I were to do this I would plane one layer of ply off one piece, so there'd be the 'usual' uneven number of layers.

I know, it's somewhat OCD...

Don't buy ply with a finished face .. just get the cheap stuff! [wink] [big grin]

Offline VW MICK

  • Posts: 843
Re: Plywood laminations
« Reply #9 on: September 01, 2017, 03:18 PM »
The ply will be with me tomorrow

So I will start a thread with the process

Thanks for your input so far


Mick

Offline Dovetail65

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Re: Plywood laminations
« Reply #10 on: September 01, 2017, 04:11 PM »
What kind of is a bummer for me when laminating two pieces of ply this way is that the seam will be visible, on account of the outer layers duplicating there. If I were to do this I would plane one layer of ply off one piece, so there'd be the 'usual' uneven number of layers.

I know, it's somewhat OCD...

I dont understand, I laminate ply to make my own thickness every day. The edge looks fantastic, you dont nee worry about the number of ply being even or odd, you cant see the line. Not if you glue it up right.
The one who says it can't be done should avoid interrupting the person doing it.

Offline Svar

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Re: Plywood laminations
« Reply #11 on: September 01, 2017, 04:19 PM »
What kind of is a bummer for me when laminating two pieces of ply this way is that the seam will be visible, on account of the outer layers duplicating there. If I were to do this I would plane one layer of ply off one piece, so there'd be the 'usual' uneven number of layers.
Take two large (square) sheets, rotate one such that grain on the adjacent layers is at 90 deg, then laminate, then cut to smaller pieces for further lamination as needed.
« Last Edit: September 01, 2017, 04:24 PM by Svar »

Offline bkharman

  • Posts: 1937
Re: Plywood laminations
« Reply #12 on: September 01, 2017, 10:08 PM »
Would love to see a build on this Mick. I was the one who made the drawer front that was referenced earlier. It wasn't structural, so I had some leeway on it. Interesting thing that had happened... I am not sure if it was the clamping or something else or just plain old dumb luck, but after glue up, the thing started "curling". Hard to explain, but that was part of why I used that sliding dovetail as a handle. I needed it to help keep the front as flat as possible.

When all of that ply is glued up, a planer takes it down rather quick. A bit of sanding and some finish was all it needed. I use that drawer all the time and works a peach. I had some other ply projects that I worked since then, but not documented so keen on yours.

Feel free to reach out mate!

Cheers. Bryan.


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Offline VW MICK

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Re: Plywood laminations
« Reply #13 on: September 03, 2017, 03:53 AM »
Thanks guys

Made a little progress yesterday

I'm going to start a thread over on member projects

Cheers Brian I hope it will stay flat as it won't really work to have a dovetailed strip across. We shall see

Mick