Food crushing is a method used as a pre-treatment for food processing, with the aim of processing large pieces of material into smaller ones and crushing large particles into smaller ones. The function of food crushing machinery is to use mechanical methods to overcome the internal cohesion of solid materials and split them. This process is called crushing or pulverization. According to the different sizes of the processed materials, splitting large pieces of material into small pieces is called crushing, and turning small pieces of material into fine powder is called grinding. Crushing and grinding are collectively referred to as pulverization.

For the sake of clarity, it can also be distinguished in detail according to the following method: materials with a diameter of around 100-200mm after processing are considered coarse crushing; A diameter of about 20-70mm is considered medium crushed; Those with a diameter of 3-20mm are fine particles; A diameter of 0.1-0.3mm is considered coarse grinding; A diameter of 0.06-0.1nm is fine grinding; A diameter of 0.004-0.02nm or finer is referred to as ultrafine grinding. According to the dry and wet conditions of the processed material, it can be divided into dry crushing and wet crushing. When the moisture content of the material is below 4%, it is called 1000 type crushing. Moisture content above 50% is considered wet pulverization. Materials with a moisture content between 4% and 50% are prone to sticking, making it difficult to carry out crushing and grinding operations.

The crushed material is crushed by slowly increasing pressure between two planes. For large materials, this method is often used for processing. The material is split by the wedge-shaped cutter head. Mostly used for crushing brittle materials. When cutting materials between two crushing working faces, the two (or multiple) support beams that bear the same load not only experience splitting force at the external force point, but also bend and break. Mostly used for crushing hard and brittle bulk materials.

Crushed materials are instantly shattered by external impact forces. This method is commonly used for crushing brittle materials. Grind it up The material is ground into fine particles by friction and shear between two working surfaces or grinding surfaces of various shapes. Mostly used for crushing small or tough materials. In the crushing operation, the crushing method should be determined based on the physical properties of the material, the size of the block, and the degree of crushing required. Two or more methods can also be combined. Due to the different raw materials used and processed in the food industry, there are various types of crushers, which are the working principles and structural characteristics of several typical models.