Plastic pelletizing is a system and technology in which plastic scraps are recycled back into a reusable raw material. The melt-filtrated strands are cooled briefly and cut into pellets. Plastic manufacturers or processors can then reuse it for a variety of applications. Plastic Pelletizing Machine for recycling plays a crucial role to recycle and reuse plastic wastes. More and more manufacturers are looking for ways to reduce waste and recycling materials in their processes.
The main parts of the plastic pelletizing machine are conveyor belt, cutter, compactor, shredder, extruder, pelletizer, cooling system, drying system and silo tank. With different internal screws systems, the machines can handle a variety of materials.
Drying system (Drying centrifuge)
Silo tank or bagging station
After plastic hopper into the screw, under the action of the rotating screw, through the friction of the inner wall of the cylinder and the surface of the screw forward transmission, in the screw feeding section, loose solid material (or material at the end) is filled with the screw groove, with the continuous transmission of material, material began to be compacted. When the material enters the compression section, the depth of the screw groove gradually becomes shallow and the resistance of the head makes the plastic gradually form high pressure, and is further compacted. At the same time, under the action of the external heating of the cylinder and the internal friction shear heat generated by the strong stirring, mixing and shear friction of the screw and the inner surface of the cylinder, the temperature of the plastic is rising continuously. At a certain point in contact with the cylinder, the temperature of the plastic reaches the melting point and begins to melt. With the conveying of the material, continue to heat, the amount of molten material gradually increased, and the non-molten material record a corresponding reduction. About the end of the compression section, all materials are transformed into viscous flow state, but at this time the temperature of each point is not uniform, after the homogenization of the homogenization section is more uniform, the screw will be quantitative, constant pressure, constant temperature squeezing into the machine head. Machine head die is a forming part, the material through it to obtain the geometry and size of the section, and then after cooling and other processes, you can get a good product.
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