Lecture
This lecture covers the technologies used to manufacture models for sand molds and cores, including solid models, separated models, and sophisticated models like the fish matrix model. It explains the process of creating cores, which are used to produce hollow parts, and the importance of planning for the removal of excess material. The lecture also delves into the detailed steps involved in making sand molds and cores, highlighting the use of wooden core boxes filled with sand and the role of armatures in supporting the internal structure of castings.