make your own kraft paper tubes
I made almost every part of the rocket from scratch, including the paper tube of the rocket body.
I also often need to make homemade paper tubes for other projects, so I think it\'s worth writing --up.
Hopefully someone will find this information useful.
Please note that these tubes are not enough for any fireworks
Type app if you are looking for it.
There are many tutorials on making convolute online (
Or parallel, non. spiral wound)paper tubes.
First of all, you need some kraft paper. I bought a 36-
A few years ago, Home Depot had an inch-wide roll that could last several more times.
Sometimes I use the shading paper of the thin painter, just as the last layer.
You can also buy this in the home improvement shop.
You need some more water. soluble glue.
Titebond I use (
This is a basic woodworking glue)
But you can use Elmer\'s or something like that.
The other basis you need is a long ruler, with a rotary knife or x-
Acto blade, paint brush, masking tape and rag.
The most important thing is that you also need some kind of existing tube as a form.
I usually use PVC or old cardboard tubes (
Like Mail Tube, carpet pipe, etc. )
But I also used steel pipes and other random cylindrical objects.
For any item you use as a form, it is vital that it is true (
Without any meaning of distortion or bending).
You can quickly test the objects by placing them on a flat surface and scrolling back and forth.
If you see any light passing along the bottom edge at any time, this means that the tube is not true, you should use something else.
The paper tube is made by gluing the multi-layer cowhide onto the table.
For tubes with smaller diameter (2\" and under)
I usually use three or four layers so that I can produce a tube that is rather light but rather sturdy.
For tubes with large diameter (over 2\")
I use four or five floors.
This is enough for most of the apps I need.
For any diameter tube you are making, you will need to cut the appropriate size Kraft note to wrap around the table.
Too narrow, your spiral will be very close, resulting in shorter finished tubes.
It\'s too wide for you to wrap it easily.
Some quick trials and bugs will tell you what kind of width bar is best for any size form you are using.
For the tubes I made in the photo here, I am using 18 1 1/4 PVC tubes as a form.
I cut 3 \"wide 36\" long psoriasis strips.
For this form of size, the strip effect of this size is very good.
Don\'t use any glue at this step!
When you\'re done, you want this to slide off the form.
Wrap the first strap around the table in a spiral way without overlapping any seams.
Fix Kraft paper on a table at both ends with a small patch of masking tape.
In particular, make sure that the paper is neatly packed, and there are no gaps and overlaps in all the seams.
Now you will glue on an extra layer of kraft paper.
The glue needs to be diluted.
I mixed a portion of water into about four pieces of glue. (
I noticed proper watering if it helps
The glue is almost the same as the store.
Bought egg wine directly from the container. )
Brush a layer of glue onto a kraft paper.
There should be no puddles, and the whole strip should be covered in complete agreement.
Start wrapping it on the tube on the first layer of paper, make sure to cover the seams on the first layer.
The seam on each additional layer should not fall directly on the seam from the layer below.
This is important.
For each layer, you want to make sure that the seams are docked well with each other and there is no overlap.
When you start packing the paper, the glue will give you a few seconds to reposition the paper, but you have to work quickly.
Once you place the paper in order to wrap the tube for the first time, you can continue to wrap the paper and press it in place until you reach the other end of the tube.
When you wrap it with glue
Saturated paper, you will feel that you can stretch a little.
You want to put each layer on it comfortably without any bubbles or wrinkles, but if you pull it too tightly or the pressure is inconsistent, the finished tube will twist as it dries.
I made a twisted useless tube.
Between two layers, you will want to wipe any glue on the sheet with a wet rag.
Once each layer is in place, roll back and forth the tubes on the table with your hand, applying a lot of pressure to work the layers together to produce a good combination.
Before removing the paper tube from the table, the end of the tube needs to be trimmed.
I find the best way to do this is to wrap a plain piece of paper tightly around the tube and use the edges as a guide to help you get a nice straight cut. Use an x-
Acto blade, cut the layers of cowhide and peel off the end of the trim.
There will be a little glue on the form and you will want to wipe it off.
Carefully remove the paper tube from the table.
I like to stand up when they are dry so that they are not under level pressure.
I am trying to speed up the drying time by placing the tube in front of the space heater, but it always causes the tube to twist.
So I suggest letting them dry themselves.
After drying, I often paint on a layer of glue to seal the paper and then lightly polish it with 220 sandpaper.
To cut them into various lengths, I prefer to use my chop saw (Chainsaw).
The edge needs to be lightly polished after each cut, but it is fast and accurate.
I often need to make retractable tubes that can get in and out well.
To do this, I made special shapes that only produce tubes that are larger than my normal tube shape. A sleeve-
The production of the form needs to be established directly by gluing a layer of ordinary paper.
No matter how many layers I use to make tubes on the original form, I stick to the new form, plus a layer.
This usually means four layers, which well produces tubes that are larger than the original form.
Sometimes I already have an existing tube that I will use for things like mailing the tube and all I need to do is make a sleeve that fits it.
In this case, I will cut off a part of the tube to create a table and glue it on a layer of kraft paper.
This new form will produce the tube as the sleeve of the original tube.
There will be a little contraction, so don\'t worry if the tube and sleeves don\'t fit at first.
Make them completely dry, and if things still don\'t fit, you can add another layer to the form and try again, or add a layer to the smaller tube, this makes it more suitable for sleeves.
I also made paper tubes with smaller diameter as sleeves to fit the rocket engine model.
To help make these little paper tubes, I made a fixture with used rocket engines, pins and some adhesive tape. Photos 2 -
Show how it works.
If you have any questions about this, please ask. That\'s it.
Thank you for your attention!