Portable Nichrome Foam Cutter

Fixtures / Instruments

Added 10 comments

Hello everyone, dear friends, today I will show you a wonderful idea on how to make a portable nichrome cutter for cutting foam. This cutter is easy to use and does not require an electrical outlet. With this cutter, you can cut out various letters and figures on polystyrene foam.

Necessary materials:
- bar
- two handles
- nichrome wire
- copper wire
- crown
- switch
- connector for crown
- wires

Step 1: Take a small bar measuring 100 * 50 * 20 mm. Then we drill two identical deaf holes in it to fix the tubes from the handle in them. Using the file, we make small grooves to insert wires into them.

Step 2: Then, using the glue gun, glue the tubes, as shown in the photo.

Step 3: Take two small pieces of copper wire and make small “ears” at their ends. And glue them to the caps of the handle.

Step 4: Connect electronics

. Glue the connector, switch and solder the wires to the frame.

Step 5: Take the nichrome wire, and attach it to the "ears". You can take nichrome wire: in a boiler, in a hair dryer, in an old soldering iron (I took from it). To pull the wire I put a small spacer from a piece of branch. We insert the crown, and you can cut !!!

Test:

April 5, 2017 6:06 p.m. 0

Reply To quote A complaint

The spring can not always be selected with the necessary stiffness and size. And when I did this, I fed through latr. Here is a diagram of the device, vertical and horizontal.

5 April 2017 09:52 +2

And for this purpose, I adapted an old jigsaw from school times. The string is sandwiched through asbestos paper.Power - from the unit, which I don’t know why.))) Toli was curling, Toli was a burner .... But it just came up ...
For example, I carved a deer according to my daughter’s drawing for the New Year:

"Idea," by the way, is not mine and I do not pretend .. So many do .. And for the first time I read it in a book in childhood. There was such a series of books of three pieces by one author: "About the hammer and pincers and other smart things", "Workshop at home" and ... here I don’t remember the third one, what is called ... I read them "binge ... I learned a lot from there my children's brain ... It is a pity that now the youth do not read ....

April 5, 2017 09:43 -1

There is also a similar experience ... But it was done "along the way" ... In the process of warming the house, it turned out that part of the foam was not 5, but 10 cm thick ... And since there were a lot of things lying in the barn, it was spontaneous they assembled a “machine tool” - the old Soviet spiral got rid of “shells”, was stretched, straightened and fixed on nails of two hundred square meters driven directly into the plank floor .... The charge was supplied from the Soviet Cascade charger. Everything was done by the "poke method" and without calculations, but ... it turned out !!! Foam the foam evenly. After switching on, the string had to be pulled up and rewound ....

April 5, 2017 09:37 0

Quote: Pronin

This end is fixed to the spring (preload). When heated by a current, the nichrome wire greatly lengthens.

That's why I asked the author: without good tension, the edges of the cut will be curves. Not to mention the fact that the heating is not regulated in any way, and the Krona will last for a very short time.

April 5, 2017 09:27 +1

He made a d ~ 0.1mm wire for cutting foam with a nichrome wire. Nichrome stretched between 2 wooden racks, over a plywood sheet. On the one hand, it was fixed under a screw on a steel strip (adapter). On the other side, the wire lay on a ceramic tube (which is attached to the rack with a screw). This end is fixed to the spring (preload). When heated by a current, the nichrome wire greatly lengthens. Voltage on nichrome is supplied (regulated) from LATR. The color of the glow of the nichrome wire (set by LATR) is slightly crimson. For different thicknesses and densities of the foam, it is different.

4 April 2017 23:54 0

Quote: maxim

How pulled? Read step: 5 (you can make a spring)

That's why I ask that I read about the branch. How will tension be produced during operation?

April 4, 2017 11:10 PM 0

You, in fact, were not asked about the calculator that calculates the "unit". But do not want to answer - do not.

April 4, 2017 11:05 p.m. Author +1

April 4, 2017 9:49 p.m. +1

How is nichrome wire tensioned? What is the cross section of nichrome?

April 4, 2017 18:45 +1

Well, show us how you can cut a specific part (the same letter) ?!
While we are watching pampering.

Portable Nichrome Foam Cutter

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