Plastic cleaning machine is the main equipment of cleaning process for recycled plastics, and plastic cleaning is an indispensable part of plastic recycling.
Pulier plastic cleaning machine mainly relies on the reamer (which can be plate or steel bar) installed on the rotating shaft inside the machine to strongly stir the material when it is rotating, resulting in the friction between the cutter and the material, and the friction between the material plays a cleaning role. Some threaded steel parallel to the generatrix of the outer cylinder is welded on the outer cylinder to enhance the friction. The speed of this kind of cleaning machine is relatively low, generally 300-600 revolutions The cleaning machine can be divided into continuous type and intermittent type. The intermittent type cleaning machine (for example, the common washing cylinder, etc.) is used earlier and is still in use.
It is easy to control the product quality because of intermittent operation until cleaning. However, due to the continuous large amount of water injection for cleaning, it consumes a lot of water, has low production efficiency and high labor intensity, and is not suitable for use in the production line;
The continuous cleaning machine mainly relies on the reamer arranged in a spiral way to push the material, so that the cleaning process can be carried out continuously from the inlet to the outlet. The rotating speed of this kind of cleaning machine should not be too high. Although the rotating speed is too fast, it will increase the friction, but because of the poor viscosity between the materials, the running speed in the cleaning machine is too fast, and the cleaning effect is poor. In order to reduce the material walking speed, the cleaning effect is generally improved The outer cylinder is equipped with a partition, which has a certain blocking effect and improves the cleaning quality. The disadvantage is that the cleaning time is not controllable (compared with the intermittent cleaning machine). However, with the continuous improvement of the internal structure design, the friction cleaning effect is constantly improved. It has been widely used in waste plastic cleaning production line, especially in PET bottle cleaning.