Do you know the principle and application of food puffing machinery?

Food puffing machine, if you want to operate it correctly, you need to start by understanding its working principle. So, what is the working principle of the food puffing machine?

The working principle of a food puffing machine is actually quite simple. It converts mechanical energy into thermal energy to provide kinetic energy. Typically, the machine uses a non-standard unequal-pitch screw system for extrusion and propulsion. The gas in the material is expelled and quickly replaced by the material itself. The material undergoes shear forces, causing backflow, which increases the pressure inside the chamber. At the same time, mechanical energy is converted into thermal energy through the friction of the material within the chamber, turning the material into a gel-like state with fluid properties. When the material is extruded to the outlet, the pressure instantly drops from high to normal, and the temperature instantly drops from high to normal, causing moisture to rapidly evaporate from the internal structure. As the screw and chamber friction mix, extrude, heat, bond, and gelatinize the material, structural changes occur, destroying the original structure and forming countless microporous structures inside. Finally, through a cutting device, the cut and cooled puffed food takes shape.

The homogenizing effect of food extruders transforms the structure of unattractive raw materials into a more acceptable form. During the extrusion process, various extruders offer a wide range of screw options to achieve the desired mixing level in the extruder. In food extrusion processing, raw materials can be pasteurized or sterilized using extrusion technology.

1. Puffed food is a successful product of applying extrusion technology to food processing. Using rice, corn, grains, and tubers as main raw materials, they are extruded and cooked to form a porous product, then dehydrated by baking or fried, and finally coated with a layer of delicious seasoning. Corn puffs and puffed shrimp sticks belong to this category.

2. Another type is puffed filled snack food, made through co-extrusion puffing. This involves extruding cereal materials to form hollow tubes, then adding ingredients such as egg yolk powder, sugar powder, milk powder, seasonings, and spices in certain proportions. After thorough mixing, a filling with good fluidity is obtained. Using a filling pump and co-extrusion die, the filling is injected into the hollow tubes as the puffed product is extruded. Puffed filled snacks processed through this method are crispy in texture and diverse in flavor depending on the filling. By altering the filling formula, various nutritionally fortified foods and functional foods can be produced.

So the puffed food we often eat in our daily lives also requires complex processing by a food puffing machine. Do you understand now? Users in need are welcome to call Jinan Datong Machinery Equipment Co., Ltd. for inquiries.