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segunda-feira, 23 de fevereiro de 2015

Injecção de Plástico, da Impressora! E forjar uma Faca, Micarta, e o CNC Arduino

No capítulo das ideias que todos goataríamos de ter, eis como fazer peças, com a Impressora 3D, ou pequenas, ou demasiado detalhadas, ou ambas as coisas...
Por exemplo, imprimam em 3D uma peça, e aperfeiçõem do Detalhes;
Usem a peça para fazerem um Molde em Silicone;
Injectem lá o Plástico, da Makerbot...
Já está.

Turn Your 3D Printer Into an Injection Molder
Matt Stultz

One of the issues with using FDM/FFF 3D printers is the ability to print small objects. The extrusion widths of the deposited plastic are just too large to capture the fine details in a miniature print. 
Molds, on the other hand, can capture every detail of an item they are trying to create. The professional world uses injection molding when they want to create small detailed parts. 
Now, Instructables user BFK (Bruce Kinsey) has created a great guide on how you can do the same with the help of your 3D printer. 

Eis um método facílimo de forjar em Metal, neste caso, uma Lâmina de Faca, mas pode ser qualquer outro objecto...
Com Ossos de Choco!
Chocante. LOL
...Chocante, de tão boa ideia que é!

Cast a blade

When I was a kid my father used to make jewelry. I watched him make
amazing things and I could always count on him knowing how to do something that would help me with my projects.
One day I asked him to make me a fish necklace. I was surfing at the time and everyone was wearing something interesting. Dad pulled out some cuttlefish bone and asked me to draw what I wanted on it. I drew a fish and then watched him turn my picture into a 3d object. He used a fine tipped oxy acetylene torch to heat up a bar of silver and drop forge it into a mould.
The result was so beautiful! The fish had a timber-looking grain running throughout it and it was timeless because of the old-school feel. I never forgot that day and have always wanted to try it again. Well here we are! Time to forge a letter opener with a timeless feel. This knife may not be practical as a bush-bashing, hair-whittling kitchen knife, but as a work of art it will certainly have people asking how you created it. I hope you all enjoy and get the opportunity to try this at your own home.

Parece um prato Japonês, mas não, é uma técnica do século passado, que consiste, muito simplesmente, em embeber Tecido com uma Resiña, prensá-lo, e produz-se assim uma Placa.
Sim, como a Fibra de Vidro, mas esta versão é mais para o Artístico, devido aos efeitos da Maquinação em camadas de Tecido de cores diferentes.
Mas poderá também servir para N outros fins!

How to make homemade micarta

Here is a short video showing how I make my homemade micarta that I use in knife handles quite often. One tip I didn't mention in the video was to use superglue to finsih the micarta. Sand it to 320 grit, rub it really well with a green scotchbrite pad (hot tip- those with dremels, chuck the scotch brite in the dremel for fast polishing). coat the handle with 5-6 coats of thin superglue, sand it at least to 320, use green then white scotchbrite (in the dremel for speed). that should give you a nice finish. attached are some examples of my homemade micarta. First two pics are a girly knife handled with pink and purple denim micarta. Third and fourth is a kitchen knife I made with the micarta in the vid, and the fifth is some with bright orange cloth. sixth is blue jean and pink jean (this was my sisters christmas present) . 

E acabamos, por hoje, com mais este Projecto para fazerem a vossa própria Máquina CNC, com o Arduino, e pouco mais:

Arduino CNC

Hi, this is my first instructable and I hope to do more.
This project was for 'Creative Electronics', a Beng Electronics Engineering 4th year module at the University of Málaga, School of Telecommunications.
It's a cnc using Arduino UNO R3 , GCode Sender and GRBL. The cnc is made of wood thanks to the help of my father. It has taken us many hours to do the mechanical part however the electronic part is faster to do, but is very gratifying. I based my project on these videos and I have received much support from the author of the first video.

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