Understand The Extrusion Granulation Process

1. Raw material preparation and pretreatment

· The plastic raw materials to be processed shall be treated according to a certain proportion, such as dust removal, dehumidification, etc., to ensure the purity and suitability of raw materials.

2. Feed raw materials

· The pre-treated plastic raw materials are fed into the extruder through the feeding system. The feeding system is usually automatic or manual to ensure that the raw material can be uniformly and continuously fed into the extruder.

3. Hot melt plasticizing

· The extruder transforms the plastic raw material into a molten state through a heating and melting process. A heater is provided inside the extruder to heat the material inside the barrel to melting temperature by heat conduction.

4. Extrusion molding

· The melt is extruded from the extruder through the extrusion die head. Forming long plastic bands. The shape of the extrusion die determines the shape of the final product.

5. Cool cut

· The extruded plastic strip is cooled by a pelletizer. And cut, turning into uniform plastic particles. The cooling method is usually water-cooled, and the cutting is carried out by a grain cutter.

6. Particle treatment

· Treat hot gas and water vapor in plastic particles to make particles. Reach a dry state. The fan system is used to discharge the hot air and water vapor generated in the granulator, and can also dry the plastic particles.

7. Packaging and storage

· The finished plastic pellets are packaged and stored in storage silos for easy production and transportation.

In the entire production process, the strict control of process parameters is the key to ensure product quality and efficiency. These parameters include processing temperature, extruder speed, working pressure, feeding speed and cutting speed. In addition, the selection of equipment is also crucial, and it is necessary to consider factors such as production capacity, raw material adaptability, equipment stability, ease of operation and maintenance, as well as environmental protection and energy consumption.

Through these steps, extrusion granulation technology can efficiently and stably produce plastic particles that meet various needs, providing an important basis for the production of plastic products.