Sand casting and semi-permanent mold casting are generally more complex than die casting, and the design function must be compatible with the opening and closing of the die in the horizontal direction. If you're using CASTMAN's salt core, you don't have to.
The core is made by die casting, these die casting salt cores are placed in different die casting machines, and other die castings include salt cores.
The resulting die-casting has the advantage that it is washed in the salt core, so competitors cannot reverse engineer the molds of the used products. The salt core is then used to cast metal parts in high pressure die casting.