food extruder-manufacture,factory,supplier from China

For a long time in the past, the impression of dehydrated vegetables was basically vegetable packets in instant noodles. Although its application to the "black technology" used in aerospace food - freezing and dehydrating vegetables technology ensures the flavor and nutrition of vegetables, after all, the supply of fresh vegetables in China is relatively sufficient, and people rarely choose dehydrated vegetables in their daily life. food. However, over the years, this situation has changed.

Directly puffed food is generally required to be dried after extrusion processing. The moisture content of the dough in the extruder is 15%~20%. The product is then dried to reduce the moisture content to 2% to 3% to create the environment needed for a crunchy texture and stable shelf life. Due to the low density of the product, the drying time is usually very short, so it should be carried out in a warm warehouse.Coatings to produce direct-expanded products Extruded and dried products are finally sprayed with oils and seasonings.

Twin screw extruder is developed on the basis of single screw extruder. Two screws are placed side by side in the barrel of the twin screw extruder. According to the meshing degree of the two screws can be divided into mutual meshing type and non-meshing type. According to the rotation direction of the two screw shafts, it can be divided into reverse rotation type and co-rotation type.(1) meshing twin screw: Because the meshing gap of the meshing screw is very small, the material has the ability of forced conveying, not easy to produce backflow, leakage phenomenon.

Explain the daily operation and precautions of the extruder.(1) Precautions before starting:1. Check all parts, especially the connecting screws and anchor bolts of each section of the puffing chamber, the connecting bolts between the motor base and the frame, and the bolts between the puffing chamber and the frame, and there must be no looseness.2. Rotate the main shaft by hand, and there should be no rubbing sound in the puffing cavity at this time.3. Start the feeding auger, check its stepless speed regulation performance, and require normal operation.4.

There is only one screw in the barrel of the single screw extruder, it is by the friction of the screw and the barrel of the material to transport materials and form a certain pressure. In general, the friction coefficient between the material and the barrel is greater than that between the material and the screw. Otherwise, the material will be wrapped in the screw together to rotate and not play the role of forward propulsion.Screw is divided into three sections: feeding (feeding) conveying section, compression melting section, metering homogenization section.

Screw extruder is mainly used in the production of starch extruded food, protein extruded food and extruded feed in the food industry, and can also be used as a special chemical or biochemical reactor.Starch puffed foodThe starch in the grain will gelatinize (αize) under the high temperature and pressure of the extruder. The results showed that the degree of starch αization was more than 98% and the crude fat decreased by 60% or even disappeared after the puffed corn flour. Water solubility increased by more than 40%. Therefore, extruder can replace roller dryer to produce gelatinized starch.

What is the twin-screw food extruder suitable for?The twin-screw extruder is one of the multi-screw extruders, which is developed on the basis of the single-screw extruder. In the barrel of the twin-screw extruder, two screws are arranged side by side, so it is called a twin-screw extruder.The twin-screw extruder is composed of feeding system, extrusion system, heating system, transmission system, rotary cutting system and control system.

A particular chemical or biochemical reactionExtruder is a new type of biochemical reactor, food in the process of being extruded, will have a series of biochemical reactions.

For extruder equipment, the model specifications of extruder equipment are classified according to the diameter of the screw. For the sake of explanation, plastic is used as an example below, but the same is true for food extruders.That is to say, the screw diameter of the extruder equipment is the model specification of the extruder equipment. For example, the screw diameter of the 90-type extruder equipment is 90mm.

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.