Design Description:

• This is a expandable pencil case that doubles in storage capacity when opened, featuring a magnetic closure design. When closed, it measures 56mmx56mmx180mm, making it suitable for storing and carrying various stationery items. It can stand upright on a desk, saving space.
• The pencil case has a simple design, revealing more intricate details when opened. The foldable ends and internal note compartments are meticulously designed, with elastic compartments for storing note papers or schedules.
• The back features three ultra-small integrated printed hinges, providing excellent strength.
• The magnets used are cylindrical with a diameter of 5mm and a height of 3mm.

Printing and Assembly:

• The main body of the pencil case can be printed in any color of your choice, with no filament restrictions; I used a 0.4mm nozzle for printing.
• The foldable panels and internal note compartments are recommended to be printed with a 0.2mm nozzle to ensure visually appealing details, and much easier to be folded than 0.4mm nozzle. These parts are suggested to be printed using PETG material to guarantee elasticity and flexibility.
• During the initial fold of the panels, do not bend them too quickly. Follow the designed direction and slowly bend to the working angle to relieve internal stress within the material. After this process, the material will be in its ideal working condition.
• Additionally, the foldable panels and magnets need to be glued and securely embedded into the main pencil case body to ensure structural stability and functionality. I used UHU glue.
• Please maintain the current orientation when printing the hinges because the fibers of the foldable parts are now perpendicular to the fold, ensuring maximum strength.

• Please ensure the foldable parts are fully folded into position before bonding.

  

   

• If PETG becomes brittle, please use the second option, a combination of hard printing material and TPU. This method requires a few more steps. You need to print the hard folding plate and the TPU foldable part separately, and then align and paste them together. After printing the TPU part, you can see four slightly raised triangles, which are the positioning boundaries for the triangle pasting.