The mold cavity is the internal space of a mold where ceramic parts are shaped during the casting process. This space is designed to precisely define the shape and details of the final part. The design and maintenance of the mold cavity is essential: any imperfections in the cavity can be transferred to the part, affecting its quality. Surfaces must be smooth and detailed to avoid defects such as burrs, deformations or unwanted textures.
It is in this cavity where the slip is poured, which upon contact with the mold walls begins to harden. This initial hardening occurs thanks to the absorbent capacity of the mold material, generally gypsum, which extracts the humidity from the slip, forming a solid layer of clay that precisely adopts the shape of the cavity.
Interesting Fact
Plaster molds are popular in ceramics because of their ability to absorb excess moisture from the slip, allowing faster drying and easier release of the finished piece.
Helpful Tip
Make sure the molds are completely dry before use and check the cavities regularly for possible imperfections that could be transferred to the parts.
