Injecção de Plástico em casa! E Mindsets em saldos, uma Fonte de Alimentação regulável, partilhem com AddToAny, e desenhem Engrenagens

Eis uma maneira de terem uma Fábrica de Injecção de plásticos na Oficina, para terem pequenas séries de objectos realmente realistas...
Usando uma Impressora 3D!
O "truque", é, para além de muita cabecinha ao desenhar os Moldes, uma Impressora Asiga, e a sua Resina especial, a Asiga FusionGRAY.
Leiam com toda a atenção, todo o atrigo, indo ao Link: 

Low-cost desktop injection moulding

Janie Barrett

Low-cost desktop injection moulding - here, Mitchell Brown from VERT Design, explains how they did it using Asiga's desktop 3D printing solution ...
Our product design company was engaged to develop a variation of a hose clip that is used on a high speed production line. The product works through the use of an integral hinge and flexible clipping geometry.
Traditionally we would test the design through the used of SLS 3D printed models, however, the results achieved were not accurate. We required the geometry to be proven in the actual production materials, which in this case was injection moulded polypropylene
Through the design phase, we developed multiple iterations. Eventually this was short-listed to two possible concepts. Producing a prototype tool in steel or aluminium would have cost many thousands of dollars and taken a minimum of 6 weeks. We turned to 3D printed tooling as it was faster and cheaper.

http://www.tctmagazine.com/3D-printing-news/precision-3d-printed-injection-moulding-tools/

Só a página, é um espectáculo, mas estes artigos estão em Saldo, por isso, aproveitem, que esta quantidade de coisas boas, para Engenhocas, vai-se esgotar, e depois, é tarde demais:

CLEARANCE. NOT TO BE MISSED!...

See our range of Clearance items. Available whilst stocks last.
When they're gone, they're gone.
Making way for new and exciting ranges.

http://www.mindsetsonline.co.uk/EmbeddedContent/MSContent/july2017a.html

E eis mais uma Fonte de Alimentação que podem fazer em casa, cortesia deste engenhoso Engenhocas no Site Instructables.

Esta, tem como trunfos der de regulação contínua, tanto de Voltagem, como de Amperagem!

É bom.

How to Make a Bench Power Supply
deba168

A bench power supply is an extremely handy bit of kit to have around for electronics hobbyists, but they can be expensive when purchased from the market. In this Instructable, I will show you, how to make a variable lab bench power supply with a limited budget.It is a great DIY project for beginners as well as any one interested in Electronics.

https://www.instructables.com/id/DIY-Bench-Power-Supply/

Isto é porreiro, uma ferramenta para partilharem o que quiserem por toda a Net, e o que é melhor, é grátis.

Vejam todas as vantagens disto, no Site:

Share Anywhere

Share to any service, or add a custom service to share to. AddToAny gets people to the right destination to share or save your content, whether it's in a native app or on the web.
https://www.addtoany.com/

Isto é maravilhoso, não só porque é um bom Instructables para desenhar Engrenagens...

Mas também, com este Intructable, podem aprender como imprimir em 3D todas as peças mecânicas que quizerem!

Através deste catálogo de peças acessível ao programa Fusion 360:

The Easy Way to Design Gears in Fusion 360

Desktop Makes

One of the first things I ever made from a 3D printer was a gear. But it wasn't just any old gear. The beauty behind this gear was that it was a replacement part for the very printer that was making it. This still blows my mind to this day. I love printing gears and still get excited about this new world that 3D printers have opened up. The problem is that designing gears have always been a bit of a challenge for me. That is until I learned what I'm about to teach you.
In the last step I also include a video demonstrating the entire process.

https://www.instructables.com/id/The-Easy-Way-to-Design-Gears-in-Fusion-360/