As a new food processing technology, extrusion technology has developed rapidly in foreign countries. Ward of the United States applied for a patent on food puffing technology as early as 1856, and it was not until the late 1930s that it was first applied to the production of cereal convenience foods.
In the process of grain, oil and food processing, extrusion technology, as one of the high and new technologies in modern food engineering, has been paid more and more attention by many food enterprises, especially by the food processing enterprises with cereals and potatoes as the main raw materials. As far as the traditional cereal processing methods are concerned, it is generally necessary to go through crushing, mixing, molding, baking or frying and other production processes. Each process needs to be equipped with the corresponding equipment, the production line is long, the area is large, the process is complex, and the labor intensity is large.
When using extrusion equipment technology to process cereal food, only after the raw materials are crushed and mixed, the cooking, enzyme inactivation, sterilization, forming, pre-drying and other processes can be completed on one extruder, so the process is greatly simplified, the energy consumption is reduced, the whole production process is almost no loss, the manufacturing cost is obviously reduced, and there is no pollution. Therefore, extrusion equipment technology is a multifunctional, high output, high quality new food processing technology.
Extruded expanded food has many advantages, wide varieties crispy texture, delicious taste, easy to carry after eating, easy to digest and absorb. As a kind of leisure food, the expanded food is popular and welcomed by consumers, especially young people.
Characteristics of expansion and extrusion equipment:
1.Improve practical quality and easy to store
The rough tissue structure of corn and sorghum, which originally contained more cellulose and vitamins, can be expanded and soft by using our leader corn extrusion equipment, and the Maillard reaction produced in the process of expansion increases the color, aroma and taste of food. So as to improve the practical quality, so that the food has a light body, crisp, rich flavor.
2.Improve product quality and reduce harmful substances
The extrusion process of corn extrusion equipment is a typical high temperature, high pressure and short time process, which makes the material treatment limited, so almost all the nutrients in the raw material are retained in the final product. At the same time, the short-term process of high temperature can still reduce the bad product factors such as harmful enzymes and microorganisms.
3.The applicability of raw materials is wide and there are many kinds of products.
There are many kinds of raw materials that can process corn extrusion machinery, which can not only deeply process grain, potato, beans and other grain, make coarse grain fine and produce exquisite snacks, but also process fruits and vegetables, spices and some animal proteins.
4.High production efficiency and low production cost.
Compared with the traditional cooking method, the processing of products by food extrusion machine technology has obvious reduction in time consumption, energy consumption, labor force, occupation of factory building and so on.
5.Waste less, no waste
Generally speaking, expect for starting and stopping machine, there is almost no waste discharge in the whole production process, and there is no waste phenomenon.
Schematic diagram of extrusion equipment
Development Prospect of Extruding equipment Technology：
One of the purposes of food processing is to make full use of existing food resources and open up new sources of raw materials to develop a variety of popular foods.The emergence of expansion technology can be said to open up a new way for the application of cereals, starch and other raw materials, which we call coarse grains, in the food industry.
In addition, with the development of food industry, the emergence of new technologies and the improvement of people’s living standards, extrusion technology and its equipment are also developing in a better direction, combined with other food processing technologies to produce more popular low oil, health care and natural food.