What are the differences between single-screw and twin-screw granulators? The following Xihua mechanical engineers will explain the difference between single-screw and twin-screw granulators. The details are as follows:

Let's take a look at the difference between single screw granulator and twin screw granulator from the working principle

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Single screw granulator: The material passes through the feeding port, and under the action of the rotating screw, It is kneaded into a ball and rolled along the screw groove. Due to the shearing, compression and stirring of the screw, the material is further mixed and plasticized, and the temperature and pressure gradually increase, showing a viscous flow state, and with a certain The pressure and temperature are passed through the machine head, and finally the desired shape of the product is obtained;

Twin-screw granulator: The material in the production process is sent to the double-cone feeder through the automatic elevator, and the material is forced to be uniformly fed into the main screw by the double-cone. The material is compressed and sheared by the screw. Under the action of external heating, the material is mixed and plasticized. The temperature and pressure are gradually increased, showing a viscous flow state, and passing through the machine head with a certain pressure, extruding and dicing, and finally obtaining the particles of the desired shape.

The difference between single screw granulator and twin screw granulator

Single-screw granulator: The single-screw extruder is mainly used for filling, blending, modifying, increasing, chlorinating, processing polypropylene and superabsorbent resins of rubber, plastics and engineering resins, degradable masterbatches , polycondensation of polyamide, extrusion of polyurethane polyaddition reaction, granulation of carbon powder and magnetic powder, preparation of insulating material, sheath material, low-smoke halogen-free flame retardant PVC cable material and various silane cross-linking materials for cables wait

Twin-screw granulator: Twin-screw granulator is mainly used for the filling, blending, modification, augmentation, chlorination, processing of polypropylene and superabsorbent resins of rubber, plastics and engineering resins, degradable masterbatch , polycondensation of polyamide, extrusion of polyurethane polyaddition reaction, granulation of carbon powder and magnetic powder, preparation of insulating material, sheath material, low-smoke halogen-free flame retardant PVC cable material and various silane cross-linking materials for cables etc., small models are mainly used for scientific research and teaching.

The main difference between twin-screw granulator and single-screw granulator is

1. The main machine of the twin-screw granulator is composed of two screws that mesh closely with each other;

2. The conveying of materials in the twin-screw granulator is forward displacement conveying, and the degree of displacement depends on the proximity of one screw and the corresponding screw groove of the other screw. The material can obtain the maximum positive displacement;

3. The material conveying speed distribution in the twin-screw granulator is much more complicated than that in the single-screw extruder.

Compared with the single-screw plastic granulator, the twin-screw granulator has the following characteristics in the granulation process:

1. The material conveying efficiency of a single screw depends on the friction properties of the solid material and the viscosity of the melt. In the twin-screw extruder, the conveying of the material is carried out by the principle of positive displacement, and there is no pressure backflow. Therefore, the material is easier to add than the single-screw extruder;

2. Due to the short screw length of the twin-screw granulating extruder, the material stays in the twin-screw extruder for a short time, which can avoid thermal degradation of recycled fiber and reduce power consumption. ;

3. The material is sheared and mixed vertically and horizontally, which has excellent homogenization and plasticizing effect;

4. Excellent exhaust and self-cleaning functions;

5. The flow rate of the twin-screw pelletizing extruder is not sensitive to the pressure of the die, and it is more effective to extrude products of large size and area. The flow rate of the single-screw pelletizing extruder is more sensitive to the die pressure.

What are the differences between single screw and twin screw granulator? The difference between the twin-screw granulator and the single-screw granulator extruder is mainly manifested in the difference in the screw structure.