Explanation

Mold, also called model, is a tool used for foundry, which is made of molding sand, metallic materials or other refractory. It includes a combination of cavities, cores, and gate systems in the shape of castings, in which metal liquids solidify to form ingots or castings with specific shapes and sizes. When the sand mold is supported in the sand box, the sand box is also part of the mold. Mold can be divided into sand mold, metal mold, ceramics mold, clay mold, etc. according to different materials. Sand mold is the most commonly used in casting production. It can be further divided into wet sand mold, dry sand mold and chemical hardening sand mold. The specific selection depends on the demand. According to the binder used, the sand mold can also be divided into clay sand mold, self hardening resin sand mold and self hardening sodium silicate sand mold. The cost of making sand molds is relatively low, and they can be remade into new sand molds after use. Metal molds are widely used in the production of non-ferrous metal castings and large-scale castings. The metal mold can be reused many times, so it is considered as a permanent mold. This mold can be used for special foundry processes, such as die-casting and centrifugal casting, but its production cost is relatively high, requiring machining. Semi permanent mold includes graphite mold and ceramics mold, which are used less frequently than metal mold, and whose production cost is lower than metal mold but higher than sand mold. The continuous casting mold is a continuous metal mold with a specific section shape.

Classification