Recently we designed a new case for RPi B+. This time we tried a different way mixing laser cutting with CNC.
Here’s the preview of this case: which is made up of 4 acrylic pieces. This is different with the cases you seen: if it is made using laser cutting, it is usually in 6 pieces; if it is made using injection – it’s better unibody. ^_^
The upper body of the cases is bended, thus creating a rounded rectangle shape effect. It looks so much like it is made using injection-molded case.
To make the case, you need following equipment.
Laser cutting machine
- Common and affordable in hacker space
- Cutting the holes for RPi connectors
- you need special knowledge to control the monster
- Drilling the T-holes to fasten two sides
And a special guest: Acrylic Strip Heater
- super-duper-awesome tool
- heating a controlled strip zone of plastic(acrylic), it will become soft and pliable
The upper part is much bigger, you have to bend it to make it into a shell over the base later. Here’s how it look in real:
To make you understand properly, here’s a comparison before and after it is bended.
See?! That’s the “magic bullet” here. The base is much simpler with some holes on it.
You have to
- drill a V-shaped slot where the plastic should be heated and bended
- drill normal slot for two sides
You may need to repeat several times to determine the best parameter to make the cases really nice together.
Heating & bending
I didn’t take a photo for this process, here’s a picture i found on google
We tried different types acrylic, I like the frosted one best!
The chamfered side on the base, we removed the possible sharp edges.
Fasten the plates with rivets.
The side is installed seperately: like adding the game cartridge to your old FC.
Holes are reserved. ^_^