What is the twin-screw extruder

The auxiliary equipment of the twin-screw extruder unit mainly includes a pay-off device, a straightening device, a preheating device, a cooling device, a traction device, a meter counter, a spark tester, and a wire take-up device. However, because of the different purposes of the twin-screw extruder, the auxiliary equipment used in the selection is also different, such as cutters, blow dryers and printing devices. So let us understand in more detail what a twin-screw extruder is.

Here is the content list:

l Advantages of twin-screw extruder

l Types of twin-screw extruder

Advantages of twin screw extruder

1. Reduce production costs: The twin-screw extruder often needs to change the color when manufacturing masterbatch. If it is necessary to change the product, it can open the open processing area within a few minutes, and you can also observe the entire screw Melt profile to analyze the mixing process.

2. Improve labor efficiency: When repairing twin-screw extruders, ordinary twin-screw extruders often have to remove the heating and cooling systems first, and then take out the screw as a whole. The split twin screw is not needed. Just loosening a few bolts, rotation of worm gearbox handle means, lift the upper barrel, the entire barrel to open and repair. This not only reduces maintenance time and reduces labor intensity.

3. Wide range of applications: a wide range of applications, suitable for processing a variety of materials

Types of twin screw extruder

1. Intermeshing co-rotating twin-screw extruder: Because the speed of the co-rotating twin-screw extruder is opposite at the meshing point, one screw must pull the material into the meshing gap, while the other screw pushes the material out of the gap As a result, the material moves from one screw of the intermeshing co-rotating twin-screw extruder to the other screw, advancing in the shape of "∞".

2. Intermeshing counter-rotating twin-screw extruder: In the intermeshing counter-rotating twin-screw extruder, the two screws are symmetrical, but because the intermeshing counter-rotating twin-screw extruder has different rotation directions, one The spiral path of the material on the screw is blocked by the spiral edge of the other screw, making it impossible to form a "∞"-shaped movement.

3. Non-intermeshing counter-rotating twin-screw extruder: Its application is less than intermeshing type, and its working mechanism is different from intermeshing type twin-screw extruder, but similar to a single-screw extruder, that is, conveying materials by friction and viscous drag. In addition to moving in the direction of the machine head, the material also has a variety of flow patterns.

4. Conical twin-screw extruder: Compared with the parallel meshing counter-rotating twin-screw extruder, the volume of a series of C-shaped chambers formed by two screws and barrels of this type of twin-screw extruder is from the feeding section to The discharging section is gradually reduced, and a larger volume of powdery materials can be added to the feeding section. As the screw becomes smaller, the materials are compressed and melted.

Nanjing Haisi Extrusion Equipment Co., Ltd. is already a mature extrusion technology company. As a leading manufacturer of twin-screw extruders in China, our vision is to become the preferred supplier of extruders in China and the world. Hope we can work together sometime.