Powder Supply Device Stir Bar Agitation for 3D Printing Uniformity

The patent transforms the static powder spreading mechanism into a dynamic one by introducing a rotating stir bar that actively agitates the powder layer. The stir bar rotates to continuously mix and redistribute the powder, preventing settling and ensuring uniform distribution. This dynamic approach replaces the passive roller/scraper system with an active mixing mechanism that maintains powder homogeneity throughout the spreading process.

The rotating stir bar creates mechanical agitation and vibration within the powder layer. As the stir bar rotates, it disrupts particle clustering and creates a more uniform powder distribution. The mechanical motion of the stir bar generates localized vibrations that help separate and evenly distribute powder particles, addressing the loosening and uneven release problems of conventional systems.

The patent introduces a dynamic stirring mechanism that actively mixes the powder during the spreading process. This dynamic approach ensures better powder consolidation and uniform distribution, which directly improves the compactness of the deposited layers. The continuous agitation prevents powder segregation and ensures consistent particle packing, leading to enhanced mechanical properties of the final molded product.

The stir bar performs preliminary mixing and distribution of the powder before it is deposited onto the build platform. By pre-agitating the powder in the supply chamber, the system ensures that the powder is uniformly distributed and properly consolidated before spreading. This preliminary action prevents defects that would otherwise compromise the mechanical strength of the final product.