puff extruder machine-manufacture,factory,supplier from China

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.

The screw extruder was first used in the plastics industry, and its theoretical research started earlier, forming a variety of mathematical models used to describe the basic principles of flow and heat transfer in the extrusion process, using these models to achieve accurate extrusion machine simulation Design. The application of extrusion technology in the food industry is slightly later than that in the plastics industry, which is mainly due to the complexity of food raw materials.

　　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 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.

How it worksObviously, the material will flow from the high pressure area to the low pressure area in two directions: one is that the wear of the square screw will be reduced as the screw rotates, and the material will be transported, sheared, mixed and heated by the barrel shell in this way.Under the action of high pressure, it is matured and then squeezed out of the cylinder.The counter-rotating twin-screw extruder generally uses two screws with the same size but opposite thread directions.

Food extruder has a service life, and good maintenance measures in the process of use can ensure that the machinery can be used for a longer time.1. When it is found that the spiral groove is blocked, do not stop the machine immediately. It should run for a moment after stopping the feed, until there is a burnt taste. This can prevent the nozzle, spiral sleeve bite. If the nozzle, screw sleeve bite can not be removed, do not hit hard, it can be removed from the body, put in the fire for a moment, you can remove.2.

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.

　　Before you get a food extruder, make sure you do your homework on the machine you’re buying so you can get the most out of it. Consider these things before you buy an extrusion machine.Type Of Extruder:　　Piston extruders, roller-type extruders, and screw extruders are the 3 kinds of extruders commonly used to make packed food products, with the latter being the most common.　　For food processing, you should determine if you require a single-screw extruder or a double-screw extruder.

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.

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.