yippee, look what I have found

[devonwoody]

http://www.binkyswoodworking.com/MusicBox.htm

The fifth photograph down show a corner joint being glued up, in the past this for me as always been the most difficult part of box making, getting corner joints (mitred etc.) to stay put whilst glue sets.

Did a trial run myself this morning on a 45% mitred cuts.

 

[CHJ]

I thought that was just normal practice John as long as the subject was big enough to get the clamps in, my problem is the clamps are nearly always wider than the sides I am trying to clamp, and only get their benefit for the first two corners.

 

[ByronBlack]

I've used ColinC's advice of using masking tape and 'rolling' up the box/frame and then adding more tape to keep the joint tight, so far it's worked a real treat and been easy as pie.

 

[motownmartin]

I've used ColinC's advice of using masking tape and 'rolling' up the box/frame and then adding more tape to keep the joint tight, so far it's worked a real treat and been easy as pie.

What is rolling up :?: :?

 

[ByronBlack]

Martin - the pieces to be joined are 'rolled' e.g:

You lay the mitred pieces face down so that the ends meet - put some tape across the joint, this acts like a hinge and you can roll each piece over so that the joins meet, the final joint is then taped and then you have a fully stable and tight method of 'clamping'

I hope that make sense.. I'll see if I can find a picture to help make it more understandable.

Heres one:

 

[motownmartin]

I think i've got you but a pic would help.

Thanks

 

[motownmartin]

OK, thanks Byron.

 

[OPJ]

Byron, I've recently been using that same method to glue up an 'instrument box' at college.

But instead of using more tape to tighten the joints, we put two loops of string around the outside of the box (sightly loose fit) and add two v-blocks to each side, inside the string. By sliding the blocks outwards you apply tension to the string and, providing you haven't tied the string too loose, you'll have really good pressure around all four joints.

Who needs a band clamp, eh! :wink:

 

[ByronBlack]

Olly - thats a great tip! I shall try with that my next box or mitre frame

 

[devonwoody]

Byron your timber is face up in the picture

Yes, thats what I have been doing in the past (using tape) and batten supports but the bl....y glue is so slippery.


Note to moderators,

I have not received any notification of above replies to my thread, and it has been happening quite regularly lately. Any reason?

 

[devonwoody]

I thought that was just normal practice John as long as the subject was big enough to get the clamps in, my problem is the clamps are nearly always wider than the sides I am trying to clamp, and only get their benefit for the first two corners.

Oh dear Chas, I hadn't thought about that, so I'm thinking I shall have to make my own corner clamps. Thinking along the lines of fabricated corner blocks that can be clamped both inside and outside and perhaps for those corners which foul the above pictured setup. I can get out to the shed in around an hour if the wife doesn't remind me of something else I promised to do.

 

[devonwoody]

Got to go shopping

but did a quick mock up

So I can put three sides in clamps with glue providing ends are 3 1/2" wide and put in the 4th side at a later time.

 

[ByronBlack]

DW they are only face up beause the tape has already been applied when face DOWN - it's just an illustration of how to 'roll' the joints together, you would have the pieces the otherway to tape them.

 

[devonwoody]

The corner mitre clamps were a disaster.
I resorted back to the tape and battens and knocked up this start of a cherrywood box.

Lovely stuff that cherry, I even did some hand planing with the jackplane. (I got some snipe hanging about on the planer)

If anyone in Devon/CornwallDorset/Somerset wants to buy a stack of sawn cherry and split it up between us (best quality) I'm up for it.