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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.

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.

　　The core filling snack production line adopts advanced co extrusion technology to simultaneously extrude two products with different textures and flavors on a twin screw host, producing various popular puffed sandwich foods such as wheat flavored chicken nuggets, sandwich rice crispy, and rice fruits in the market. Nutritional powder, cereal Congee and puffed snack food of various shapes can be produced by changing molds and auxiliary equipment.

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.

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.

　　The product produced by the puff snack production line is a kind of extruded snack. It uses advanced co extrusion technology to extrude two kinds of products with different texture and taste on a twin-screw host at the same time to produce popular McChicken pieces, sandwiched rice crisps, rice nuts and other puffed sandwich foods in the market. It can also change molds and auxiliary equipment to produce Breakfast cereal Congee, nutritional powder and puffed snack food of various shapes.

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.