What is the difference between twin screw extruder and single screw extruder?

The difference between single screw extruder and twin screw extruder

1. Differences in use

The food generally produced by the twin-screw extruder does not require a large extrusion force. The extrusion force of twin-screw extruder is not as good as that of single-screw extruder, so it is generally used for products such as snacks and dog food that do not require high extrusion.

The single-screw extruder generally needs a large extrusion force to make some food. The extrusion force of the single-screw extruder is much larger than that of the twin-screw, so it is generally used for high-extrusion foods such as macaroni, rice straws, and shells.

2. Stability aspects

There are two screws in the barrel of the twin-screw extruder that work at the same time and engage each other stably and efficiently.

Compared with the twin-screw extruder, the single-screw work of the single-screw extruder is less stable than the twin-screw extruder. More food making.

3. Functional aspects

The principle of twin-screw extruder is the same as that of single-screw extruder. The products are extruded from the die and extruded by high heat and then rapidly expanded and cooled. The general principle is the same. The functional difference mainly depends on the size of the extrusion force, and the corresponding equipment should be selected according to the type of puffed food.

4. Clean up

After the twin-screw extruder is used, pour the waste into the feed port, and use the waste to extrude the remaining material in the screw, so that there is no residue in the screw. Continue to use it tomorrow.

The single-screw extruder has only one screw and cannot clean the remaining material in the screw by interlocking the two screws. After the screw cools down, pull out the screw for cleaning.

Summary: The twin-screw extruder has the advantages of affordable price, high stability, large output and easy cleaning. However, it is not suitable for some foods that require high extrusion force. Compared with single screw, it is more suitable for some foods that require high extrusion force.

If it is not a product that requires a high extrusion force, just choose a twin-screw extruder!