Vacuum casting is a “delicate shaper” in the field of precision molding. This technology, which injects molten materials into molds in a vacuum environment, can effectively avoid defects such as bubbles and shrinkage cavities, achieving high-precision replication of parts with complex structures. It has excellent adaptability to materials like resins, waxes, and low-melting-point alloys, being suitable both for the rapid manufacturing of small-batch precision parts and the accurate reproduction of prototypes. From functional prototypes of auto parts, precision components of medical devices to detailed restoration of crafts, vacuum casting is widely applied for its characteristics of high molding quality and short production cycle. Here, we analyze key points of mold preparation, material proportioning skills, and vacuum parameter control methods, share defect prevention experience and industry application cases, helping you master the core knowledge and practical application of vacuum casting.