A core is a mold component made from sand that allows us to form an internal geometric shape within a casting or in back draft areas. Cores are created by packing sand in a core box made of wood, plastic or metal.
Depending on the complexity level of the desired casting, one or more cores might be required when manufacturing the mold.
The sand core process uses chemically bonded sand, which is obtained by mixing high silica sand, two different resin types and a catalyst which reacts with the resin to harden the mixture in the desired shape. This process is adapted to create both small and large-sized cores.
This process consists of creating a shell core by using sand, resin and heated tooling (a metal core box).