• Jan 29, 2026 basic principles of gating and risering al cools and solidifies, thereby preventing voids, porosity, and other defects associated with shrinkage. Types of Risers: Open Risers: Exposed to the atmosphere, often used for simple or small castings. Blind Risers: Enclosed within the mold, used for complex or large castings. Hot Risers: By Delta Jacobs
