The twin-screw granulator can process plastic products […]
The twin-screw granulator can process plastic products and has good performance. The equipment is operated through the intake process, compression and exhaust process to ensure that the output product meets the quality requirements. In addition, it has dry cutting technology, water ring cutting technology, underwater cutting technology, etc., with different use effects. The following editor will introduce the working principle and production process of the twin-screw granulator. Let's take a look.
What is the working principle of the twin-screw granulator?
1. Intake process
The basic element volume between teeth gradually expands with the rotation of the rotor and is connected to the air inlet. When the volume of the basic circle between teeth exceeds the position of the air inlet after rotating to a certain angle, it is disconnected from the recent orifice and the air inlet ends.
2. Compression process
The meshing surface gradually moves to the exhaust end, the tooth groove space between the meshing surface and the exhaust port gradually decreases, the gas in the tooth groove is compressed, and the pressure increases.
3. Exhaust process
The engagement end surface communicates with the exhaust port, and the compressed gas is discharged until the exhaust port is closed.
What is the production process of the twin-screw granulator?
1. Dry cutting process of twin screw granulator
Dry granulation production means that the strip material is extruded in the plastic granulator and immediately cut into granules with uniform length by the rotating blade, and then the granules are sent to the cooling and sieving device by the fan through the pipeline. This pelletizing method is suitable for mixing and pelletizing polyvinyl materials.
2. Water ring cutting process of twin screw granulator
Water ring pelletizing production means that the strips extruded by the plastic pelletizer are immediately pelletized by the rotating blade, and thrown to the high-speed rotating water ring attached to the inner wall of the pelletizer, and then the water flow takes the pellets to the water separator for dehydration. After drying, it is sent to the material cooling device to cool down, which is the finished product. This production method is suitable for mixing and pelletizing polyolefin materials.
3. Underwater cutting process of twin screw granulator
Underwater pelletizing production means that the strips extruded by the plastic pelletizer are immediately fed into the water to cool down, and then cut into pellets, and the pellets are sent to the centrifugal dryer by circulating water for dehydration and drying. This kind of granulation method is more suitable for the twin-screw plastic granulator to mix raw materials and granulate, and is used for larger batch production.
4. Cold cutting process of twin screw granulator
Cold cutting refers to the material that is mixed and plasticized by the plastic granulator, and then the plastic sheet material is formed from the molding die in front of the barrel, and then it is cooled down in the sink and then coiled, and then cut with a special pelletizer. grain.