Hot chamber and cold chamber die casting do not describe whether the final component is hot or cold. The terms distinguish the injection arrangement. Understanding that arrangement explains why alloy compatibility is a more useful starting point than asking which machine is faster.

Gravity die casting and high-pressure die casting can both use reusable metal tooling, but the way metal enters the cavity differs. That distinction affects the production equipment and the design questions that need attention. Calling both routes die casting without identifying the filling method leaves an important part of the proposal undefined.

Low-pressure die casting and gravity casting differ in how metal is delivered into the mold. In a typical low-pressure arrangement, controlled pressure moves metal from a holding furnace through a feed tube. Gravity filling uses the metal head and pouring arrangement. The practical choice depends on the component and production system, not on the process name alone.