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/diy/ - Do It Yourself

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1773136 No.1773136 [Reply] [Original]

I've been making audio diffusers in my shop but the wood glue isn't cutting it. What kind of adhesive should I be using. It's mostly pine to pine.

>> No.1773142

woodglue is stronger than the pine, but there's a significant dry time and favors clamping.

If you're wanting to do this fast, shoot concealed brad or pin nails to hold it together while drying. CA glue, and construction adhesive would work.

>> No.1773145

if wood glue isnt cutting it then you're doing something wrong

>> No.1773146

>>1773142
>woodglue is stronger than the pine

I keep reading this and hearing this but in my experience it's far from the case.

>> No.1773147

>>1773145
I'm not clamping. The uneven nature of the diffuser makes clamping totally impractical.

>> No.1773154

>>1773146
>I keep reading this and hearing this but in my experience it's far from the case.

In my experience, it is. That's not to say a glued joint isn't weaker than a solid piece (it is, but not because of the glue itself), but it's a valid claim.

Either way, I have no idea what OP is doing so badly that wood glue is failing under next to no load.

>> No.1773156

>>1773142
>construction adhesive would work.
Use this. Pl400 or something similar. The benefit of a construction adhesive is that it is thicker, more sticky and doesn't necessarily need to be clamped, although it should. The bond should also be much stronger than wood glue.

>> No.1773157

>>1773147
>The uneven nature of the diffuser makes clamping totally impractical.
no, you're wrong and you're doing it wrong

>> No.1773158

Idk what this diffuser is, but it if looks like the gif, then you choosing to not clamp it is the issue. You can literally clamp anything.. Go spend $100 on some clamps and some spare 2x4s if you have to.

>> No.1773160

>>1773158
>>1773157
>lol just clamp 500+ pieces of random length 2x2

>> No.1773161

There's plenty of contact surface between the blocks in your op. When you use wood glue smear it across the the entire bonding surface then clamp until it blows out the sides. There's of course clean up, but the failure of wood glue in my experience is ripping off the face off of one of the bonding surfaces.

>> No.1773162

>>1773160
Are you gluing these to a backing panel or to each other?

>> No.1773163

>>1773146
When you break apart glued pieces of wood, it is the wood that gives away, not the glue. The glue never breaks a layer off exposing the inside of the glue parallel with the joint. This does not mean that the glued joint as a whole will be stronger than the wood around it. The failure point should be at the joint simply because it is a joint where all the forces are being applied. Any time wood and glue separate smoothly, without wood splinters being torn out of the wood, means the wood was not prepped properly prior to gluing.

>>1773147
>>1773160
Just rest weight on their tops to glue them down. If you need to glue their sides together near the bottom wrap them with a ratchet strap.

>> No.1773173

if your pieces are cut from a 2 by 4 than and they are not very flat then you would want to use loctite PL3x. bassically if your not running them through a jointer and a planer or at least a table saw you want the loctite. otherwise wood glue is fine. want kind of wood glue are you using? is it old, how long are you letting it dry. Sometimes when Im impatient Ill put
wood glued items in my truck and crank the heat, that dry's it pretty fast. this wont work with construction adhesive.

dont even bother with any other construction adhesive , at least for wood other than the pl3x

>> No.1773192

>>1773136
op getting schooled on proper gluing techniques ITT

>> No.1773195

the wood glue isn't the problem. the problem is that a low iq retard with no spatial reasoning.

make two inverse audio diffusers so that when you stack them on top of each other it's completely flush.

>arrange the bottom diffuser blocks and clamp them all together on the sides
>do the same for the top diffuser
>stack them together

now smear some wood glue on two backing boards and put one on the bottom and one on the top and clamp top and bottom.

>> No.1773241

Use a ratchet strap to clamp that shit together. How do you have that awesome shop and no skills?

>> No.1773242

>>1773160
No, dumbass, if you want it to not look like the glued messy pile of shit it is you do it piece by piece.

>> No.1773245

>>1773241
Kid doesn't know how to do a proper glue up, that's some gif he found online. Just google audio diffuser and go to images.

>> No.1773246

>>1773160
See
>>1773195
The part about being a low IQ retard.

>> No.1773249

If it looks anything like the pic in the op there is no fucking reason you shouldn't be able to clamp them when gluing them...

Also if you're worried about them shitting out the side when you clamp them up you could shoot a pin nail into each one with a brad nailer after getting it glued up.

>> No.1773261

>>1773136
>wood audio diffuser
glue offcuts of carpet to your walls instead.
1/1000th the cost, time, effort

>> No.1773299

1) pine scraps
2)4x8 OSB
3) PU construction adhesive (foaming type)
4) scraper/blade
5) rubber bands or straps or even bungees

Lay OSB flat
Apply PU glue in managable 1x1 foot sections
Layer about 1 mm thick by scraper
Lay pine scraps end on, random height alignment
On random scraps apply a bit of glue on sides to create a random glue mesh
Bundle together with rubber bands
Repeat after a few hours of cure.


You can hang that like drywall or from a ceiling.

The PU glue should foam up slightly and fill in any gaps.

Spray paint black and you could never tell the difference

>> No.1773300

>>1773261
I think the point is to make it look nice. He can make it look like modern art.

Besides.... better than foam or carpet?

Composite:

Engineered wood/plywood
Closed cell foam
Polyester batting (dacron/codel)
Plyester microvelvet fabric

In other words: upholstered enclosure or walls.

>> No.1773304

>>1773136
Wavy foam is way cheaper/better

>> No.1773323

>>1773156
PL bonds are quite a bit weaker than wood glue actually. ~600psi vs ~3-4k psi
That isn't to say they aren't still good, PL is great.

>> No.1773620
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1773620

i had this problem too
but in two days it was solid as a rock just using glue

>> No.1773622

Wait till op tries to glue all these to the drywall

>> No.1773628

>>1773620
you couldn't even bother to sand the splinters. not angry, just disapointed

>> No.1773632

>>1773147
no it doesn't, you just have to get creative. Put 2x4s around the edges, add saran wrap or painters tape to keep any glue that seeps out from adhering, and clamp the 2x4s to push all the wood together. You stupid fucking bitch.

>> No.1773634

>>1773136
Your using the wrong glue or you dont know how the works, which is it?

>> No.1773639

>>1773304
i'm not sure about that. foam only takes a small amount of high frequencies while the blocks are a solid obstruction so they reduce echo way better. cheaper? yeah you're right about that unless op's free time is worthless

>> No.1773652

>>1773160

Lmao, OP is a fucking idiot, "hurrrr my glue won't work." Then people tell him he has to clamp shit for it to hold (OBVIOUS) and he gets mad and acts like they're wrong

>> No.1773700

>>1773652
I often don't clamp wood glue. It works fine. You can do a rub joint too.

>> No.1773722

>>1773620
What a fucking mess

>> No.1773732

>>1773628
I imagine this is going to hang on the wall a quarter finished, above a gaming pc that has one of those boob hentai mousepads next to an ashtray and 2 litre with a lite dusting of cat hair on everything.

>> No.1773738

>>1773136
Hot Glue

>> No.1773813

why don't you just get peg board and screw into the back of those wood blocks?

>> No.1773827

>>1773620
What kind of fucking retard would try to mount this anywhere?

Just get some fucking pluck foam at this point

>> No.1773938

>>1773620
Looks like he is just sticking them in one at a time.
If I were to try I think I would ratchet strap a ~10x10 cube together after adding some glue then knock the individual squares into a random arrangement. After its set you cut it in half to get two 10x10 panels with a flat side and random side. You could probably just use the first one as a template and set your next 10x10 on top to get the same random lengths for a pattern that tiles artistically.

>> No.1773943

>>1773938

Exactly. There are many ways to glue all the blocks together on the sides that make contact, and then a few screws through the baseplate. OP is not the most practical minded person in the world. His method of putting glue on the bottoms makes me weary.

>> No.1773947

>>1773943

Yeah. Why the fuck would you glue the bottoms as opposed to the sides where the wood has the most contact with each other is beyond me.

I mean does a solid chunk (if it was actually glued like a white person would do it) of wood that is at the minimum 2-3" thick really need a backing board too?

Jesus...

>> No.1773954

>>1773947
I posted the other day about PL glues, I must of missed where he said he was being retarded and only gluing the end grain.

>> No.1773972
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1773972

>>1773827
>>1773304
foam is shit for audio stuff, you need extra mass as well as extra surface area and extra surface angles. that's why heavy cloth like high-nap towels and random lumber works well. combining them is even better

>> No.1773986

>>1773160
>>1773158
Go to Jupiter and assemble the thing there, the extra gravity pulling the 2x2’s down is basically a clamp.

>> No.1774026

>>1773986
He can build a centrifuge to sling it around to achieve the same thing.

>> No.1775784
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1775784

>>1773136
>wood glue isn't cutting it

what's wrong? Are yuou clamping? I assume it's wobly. I made these in a custom speaker shop, and I can tell you that the smallest ones should not be connected to the tallest as you get some torque issues.
Another thing we did was pre drilled each block on a press, and used a dowel during assembly. For contrast and look, we used different color wood from scrap.

One more thing is make sure the wood is square before you cut to length. Standard wood glue is fine.

>> No.1775788

>>1773620
that's a bit disappointing. Looks like you didn't smooth anything, and assembled with all those rough edges.

>> No.1775790

>>1773160
Just assemble it at the bottom of a 500 foot deep hole. Then pull it up to the top, the g forces from being pulled up will act as a clamp.

>> No.1775791

>>1773136
Hide glue is strong, fast-drying, and doesn't need clamping. If you don't have any of the proper woodworking-grade stuff, powdered gelatine (as in, the food) is basically the same.

>> No.1776042

>>1773136
You're glueing the ends of thousands of fibers instead of the flat side of a few fibers, thus actually having less surface area in contact.
Make sure you're really buffing/sanding your glued ends.

>> No.1776059

>>1775790
lmao

>> No.1776083

>>1773136
>wood audio diffuser
Bruh you know hard materials reflect sound right? Like, I'm not tryna have a 5head moment here but have you considered something that has high surface area and absorbs vibrations like, IDK, fucking foam my dude?

>> No.1776204

>>1773136
You tried liquid nails yet?

>> No.1776397

>>1773147
Most wood glues require clamping for proper adhesion.
Also, regular wood glue is Polyvinyl acetate (PVA) glue, and this can “skin over” on the surface within a few minutes, causing adhesion not to be as good.
Elmers glue is basically the same stuff, and will have a longer set time, helping to prevent the “skin over” issue.
Rubbing the two parts being glued back and forth together, will break diwn the skin on the glues surface, and cause a better bond.
If moisture is an issue, you basically need to use a Titebond III type (PVA) glue, which has significantly more water resistance, but the same problems as above.
If you’re really lazy and don’t want to clamp stuff, use Cyanoacrylate glue, ie. Crazy Glue/Super Glue.
This will bond almost instantly, although it can be hard and brittle.
Baking Soda can be used to make it bond even quicker.

>> No.1776399

>>1773147
Place all the shortest pegs, clamp with a sheet of wood above them. Move to the next shortest, repeat.

>> No.1776404

>>1773972
I'm so fucking glad I don't have to dust something like that, Jesus fuck.

>> No.1776413

It's an annoying glue up. I'd reject the job, but tightbond ii or iii to the faces and sides (not end grain). Two boards with blue painters tape running the entire length on parallel sides, with as many clamps as needed; then, two board slightly smaller than the entire length of the other two parallel sides, with as many clamps as needed.

Seems like a long walk for a short drink of water.

>> No.1776414

>>1776404
when you have that much money, dust doesn't even get into your home.
positive pressure, forced air, filtered.

>> No.1776417

>>1776413
Addendum: if this is going to be a whole wall, just glue up... idk... 24x24 squares, sand them, and glue those to each other.

You must have an awful lot of spare time.

>> No.1776421

This seems like a perfect application for a biscuit joiner.

>> No.1776436

>>1773620
>had this problem too
well you're gluing the ends of the timber to a smooth board. wouldn't be surprized if OP was doing some similar retarded shit

>> No.1776725

Wood glue is for gluing, not cutting.
Try a saw

>> No.1777754

>>1773163
>with a ratchet strap.
Nobody responding because they're too busy looking clever to actually be this clever.

>> No.1777771

>>1776414
Where do you think dust comes from exactly?

>> No.1778559
File: 1.82 MB, 3010x2000, d041dfc0361a5998ced59db115df98030d7688fe50efd32793f6b21f9ff0d9a9.jpg [View same] [iqdb] [saucenao] [google]
1778559

>>1773136
I will bet someone $500 right now that OP's audio setup has literally no need for fucking diffusers, lmfao.

>> No.1778600

>>1778559
You do know that trips in your image resolution don't count right?

>> No.1778605

>>1778600
They don't, but your dubs sure as hell do. B^)

>> No.1779574

>>1778559
What makes me giggle about this is the shit tier mic there with the $3 amazon basics pop shield

>> No.1780943

>>1773147
Make a negative panel. Flip it and put it on the top so you have an even surface. Apply glue and backplate, clamp that shit. Boom 2 diffuser panels at once

>> No.1780997

Take your time cleaning and prepping the wood, any dust on the surface will compromise the glue sticking to the wood. Use a small brush to apply the glue and clamp it. It will take more time but the results will be much better

>> No.1781000

>>1776421
lol
Make a jig for the drill press and just dowel shish kabob rows or the entire grid.

>> No.1781034

>>1773136
>wood glue
if you used it properly, it would be stronger than wood.

>> No.1782450

how heavy will this thing be?