Additive Manufacturing Core-Shell Mold Hollow Structure

The patent applies preliminary action by pre-forming a core shell mold with a specific hollow structure and thickness distribution before the casting process. The hollow structure is designed with varying wall thicknesses that are optimized in advance to compensate for shrinkage that will occur during the actual casting operation, thereby maintaining dimension accuracy while retaining the benefits of additive manufacturing efficiency.

The patent applies local quality by creating a hollow structure with non-uniform wall thickness distribution. Different regions of the hollow structure have different thicknesses tailored to their specific functional requirements - thicker sections in areas prone to shrinkage and thinner sections where dimensional stability is less critical. This localized variation in thickness enables precise control over shrinkage behavior while maintaining overall manufacturing simplicity through the additive manufacturing process.

The patent applies segmentation by dividing the mold structure into a hollow configuration with internal support elements. The hollow structure is segmented into multiple sections with strategic placement of support ribs or internal frameworks that provide structural stability without interfering with the outer dimensional accuracy. This segmentation allows the structure to withstand printing forces while maintaining precision, as the internal supports carry the mechanical loads while the outer walls maintain their precise dimensions.