#1
|
|||
|
|||
Glue tabs for cylinders
Question for you rocket modelers and really anyone who routinely assembles rectangles of paper into tubes of model glory. As I dabble in building a rocket garden of my own, I'm finding that when I cut a glue tab out of the same 90-110 grain paper stock, glue it to the back of the part to be rolled and then roll the part around a former, I get a crease at the point where the tab was secured. Hard to get a good picture as an example so I hope you understand what I'm feeling.
I've tried to preshape the part and cut the tab smaller. On my next build, I think I'll just trim out the glue tabs on regular ol' 20lb stock. Doesn't seem that it would be strong enough but ... do you guys have any other secrets to keeping the cylinder from having a seem crease at the edge of the inner glue tab?
__________________
Happy Crafting - Scot On the Bench: Planck and Hershcel |
Google Adsense |
#2
|
|||
|
|||
Try this:
|
#3
|
||||
|
||||
Scot - I handle things like this by...
a) Cutting the tabs off. b) I then cut a strip of paper and use this on the inside of the tube when I butt-join the piece together. c) I then use a rod or something similar in the inside of the tube to "help" the shape. And as cfuruti says, be sure to pre-curl the paper. ----------------------- But having said that I am sure some of the rocket specialists have better methods to achieve what you want. Joe T????
__________________
The SD40 is 55 now! |
#4
|
||||
|
||||
Rocket Tube Gluing
For doing really long tubes, my method uses lengths of wood dowel and or PVC Pipe.
Around the dowel or PVC: tape double sided tape in rings spaced about 6-inches apart. Square wood dowel works best: You can line the glue tab edge with the edge of the dowel-that way the tube does not have a spiral built in from non-aligned edges when gluing. Here is a drawing of how I make rocket tubes. All my tubes have a glue tab. This creates a seam. Use of this seam helps keep other rocket parts aligned on my models. The chair and table create a gap that you can use to work on the long tube. The dowel or PVC pipe with the tape rings holds the paper so you can line things up before gluing. On really long models, start in the center when gluing and work you way towards the ends, make sure to keep the seam straight. You're actually talking about the double creases of the backing glue tab: When using paper, too much liquid glue can cause issues with any glue seam. Have you tried a different type of glue? A glue stick might work better at helping hide the glue seam. Mike |
#5
|
||||
|
||||
I think the question might be how to reduce the bulge/crease of the joining strip showing through the part on either side of the joint. You can see the bulge in the photo.
__________________
~Doug~ AC010505 EAMUS CATULI! Audere est Facere THFC 19**-20** R.I.P. it up, Tear it up, Have a Ball |
Google Adsense |
#6
|
|||
|
|||
Yes, that's why I recommend pressing the tube/dowel/rod against a flat surface. That way, it won't crease unless the tube/dowel/rod's diameter is too small. It still might create a bulge if too much glue is used, since paper stretches more when damp.
|
#7
|
||||
|
||||
Why not feather the glue strip edges with sandpaper, roll the glue strip to match the shape desired and glue it in place.
Another option is to make the glue strip the same size as the inner dimension of the cylinder. This also adds strength to the cylinder. Effectively putting a butt joined cylinder inside a butt joined cylinder.
__________________
Paul |
#8
|
||||
|
||||
To get rid of the bulge that SCEtoAUX is referring to, try using a regular piece of copy paper as the glue tab to hold the cylinder together, the glue will make the piece of paper strong enough to hold.
The copy paper is more flexible and should not leave a bulge or crease on your model. Zach |
#9
|
||||
|
||||
Bit of a late offering.
Also perhaps, try cutting out extra ears to the part and rolling the whole lot to the diam. you want before triming. That way the ends to be joined tend to remember the curve they're expected to take up. Also perhaps, - it was once suggested to cut strips of junk mail, roll them up into a spiral without gluing and letting them expand freely inside the cylindrical part, - but don't know if that one works, |
|
|