Process Flow

Firstly, we pour the crushed PET plastic bottle pieces into the hopper, and then convey the raw materials to the upper hopper through the screw feeder, and then feed the raw materials into the extruder. The hopper is equipped with a level meter. In order to transport the quantitative raw materials and prevent over transportation or lack of materials. Once inside the extruder, we use a twin-screw extruder to transform the PET bottle flake raw material into a molten state and transport it forward after entering the extruder. During the first vacuum, approximately 95% of the water in the PET is removed by the vacuum. Therefore, after the second and third vacuum ports, the PET is 100% water-free. This ensures the high viscosity of the PET and the quality of the PET material. After melting, the PET is conveyed to a non-stop screen changer, where the dust in the PET is filtered by the screen changer, extruded into strips by the die head, cooled in a water tank, pulled to the air knife, where the water strands on the PET are blown dry by the air knife, and then fed into the pelletizer for pelletizing, and the chopped pellets are conveyed to the silo. The silo is also equipped with a drying system to handle the cut pellets. After a drying process, the finished PET pellets are obtained. If customers need other configurations, such as vibrating screen, we can also configure them.

Advantages

1 Parallel co-rotating twin-screw high-torque extruder. Equipped with a twin-screw high-torque extruder, it is advantageous to have a higher output of PET raw material at low temperatures and speeds. The GS75H extruder, for example, can produce 500-700 kg/h with a motor power of 160 kW. Take GS75 extruder as an example, compared with 75 type ordinary torque extruder, the torque of high torque extruder can be up to 2500Nm, which is 1-2 times of the ordinary torque, and the level of high torque torque can be up to 11.7, while the ordinary torque torque is only about 6, so the use of high-torque extruder can greatly improve the output.

2 Energy-saving and environmentally friendly ultra-vacuum system. Compared to conventional drying extruders, no drying is required with an ultra-vacuum system. The equipment equipped with drying system consumes 200 kWh more electricity for each ton of raw material, while our equipment does not need drying, which saves more than 40% of energy. Secondly, the vacuum degree can reach 100pa absolute vacuum, and is equipped with three vacuum ports to ensure that the water in PET is completely discharged to ensure the high viscosity of PET, with a viscosity drop of less than 0.03.

3 No stopping to change mesh, large filtering area. Our filtration area ranges from 1200-5000 square centimeters, which can be configured according to customer's requirements to ensure that there is no residual waste in the final particles, while the general configuration of the counterparts of the filtration area of only 150 square centimeters. At the same time, the duplex screen changing device can always keep the machine running.