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The extruder has the functions of compression, mixing, kneading, melting, puffing and molding. The cavity of the extruder can be divided into 3-5 zones. Each zone can be heated by steam or electricity, or by extrusion friction, so as to achieve the purpose of cooking the material. Under the action of high temperature and high pressure in the cavity, the starch Gelatinization, protein denaturation. When the material passes through each zone of the extruder cavity, soluble flavor substances and pigments can be injected into the material through the cavity under high pressure.

Extruder is the key of extruding technology. Extrusion processing technology as an economical and practical new processing method is widely used in food production, and has been rapidly developed. Extrusion processing mainly by an extruder step to complete the raw material mixing, curing, crushing, sterilization, pre-drying, molding and other processes, to make puffed, organized products or not puffed products.

There are many kinds of raw materials and products in the food industry, and the processing technology is different, so the mechanical equipment of food enterprises is also very complicated.Raw material processing machinery: including decontamination, cleaning, selection and other mechanical equipment.Crushing and cutting, dividing machinery: including crushing, crushing, grinding, dividing, cutting and other mechanical equipment.Mixing machinery: including powder mixing machinery and equipment.Sorting machinery: refers to the sorting machinery of powder and block materials.Molding machinery:

1. Unit production capacityThis refers to the capacity of machinery to produce food products, that is, the rate at which a certain food is produced. For example, how many mooncakes can be baked per unit time (hour) in a tunnel oven. Food production is often assembly line work, in the production line there are always many machines and equipment in order to complete a product. For example, the moon cake production line is composed of batching, mixing, mixing, molding, baking, packaging and other equipment, and there are various conveying and auxiliary equipment in the middle.

　　The puff snack extruder has two pairs of screws that mesh with each other and rotate in the same direction. They jointly play the roles of conveying, friction extrusion and heating. The materials are input by the principle of positive displacement for forced conveying, and pressure backflow is rarely formed.　　Thus, the problem in this respect on the single screw extrusion extruder is better solved, and strong conveying. puff snake extruder integrates compression, mixing, mixing, shearing, melting, sterilization, expansion, molding and other functions, and is completed in a very short time.

Working Principle of Twin Screw ExtrusionAfter a certain amount of pulverization, the material with a certain water content is fed into the extruder cavity, so that the material will undergo mixing, shearing, A series of complex continuous processes such as melting, curing and sterilization. Because there is a certain air pressure difference inside and outside the barrel, the moment the material is extruded, the external pressure it is subjected to is reduced to normal pressure, so that the material is instantly puffed.

The fiber-drawing protein of twin-screw extruder takes low-temperature soybean meal, soybean protein isolate and wheat gluten as main raw materials. In the twin-screw extruder, the processes of extrusion, forced transportation, crushing and kneading, mixing and homogenizing, shearing and extrusion are completed. At the same time, the processing process of high temperature and high pressure and sterilization is continued to modify protein molecules and form a new layered fiber structure. Produce high-strength, high-toughness, texture and taste similar to meat.

The pet chew production line is specially used for the production of dog chew products. It uses a unique extrusion method and mold to produce strip, rod, twist, two-color or multi-color chews with various shapes and sandwiches.1. Process flow of dog chewsRaw material preparation → mixing → extrusion molding → cooling and conveying → cutting machine → conveying → drying → packaging.2. Configuration and introduction of dog chewing equipment①Mixing machine→②Screw conveyor→③Single screw extruder→④Cooler→⑤Cut off machine→⑥Elevator→⑦Oven.1.

Application of twin screw extruder:The raw materials suitable for double screw extruding equipment are very wide, there are corn, sorghum, rice, wheat and buckwheat and so on.The puffed material is then ground into powder, which can be used as mixed powder to improve and enhance the sense of eating. It can also be used as a binder for food, viscosifier, binder for casting sand, viscosifier for weaving and dyeing industry, and raw material for floating bait.Principle of twin screw extruder:The twin-screw extruder pushes the material by the screw sleeve and kneads the mixing block.

　　The fried wheat flour snack production line is a new technology that replaces traditional steamed food production with twin screw extrusion technology. This production line integrates raw material mixing, steaming, ripening, puffing, shaping, frying, and seasoning. And without the need for boilers, the production process is simplified, efficient, and environmentally friendly. The raw materials can be either single materials such as big Rice noodles, corn flour, flour, or a mixture of these materials.