Check out these hexagonal features on the underside of my Bambu Lab A1 printer. Although they look really cool, they have a functional purpose: stiffness, flatness, and flow.
?? STIFFNESS:
Plastic #injectionmolding parts can only be made so thick before it is difficult for molten plastic to flow to all corners of the part. For materials like ABS, it is recommended to stick to under 3mm of thickness.
A 3mm thick plate of plastic is fairly weak if you bend it, which can be problematic when making strong plastic parts. To make the plastic parts beefier, we add features called "ribs". These ribs increase the cross-sectional area of the part, making it stiffer.
?? FLATNESS:
Typically, long ribs are added in the direction that you want to add stiffness to maximize their impact. However, we run into another challenge with injection molding by adding long ribs. As molten plastic cools, it also contracts - which can cause the part to warp or bow.
In order to achieve a flat, stiff part, the engineers here used hexagonal ribs instead of long ones. The hexagonal ribs cool and effectively cancel out each others bending forces, helping maintain a flat part.
?? FLOW:
The hexagonal shapes also help ensure molten plastic will flow to all corners of the part before it cools. NEAT!
This part is full of very cool features like sliders, lifters, multiple gates, and various ejector pins and blades. The amount of work that goes into a single plastic part is crazy. Design for #manufacturing is really fun