The color sorting machine is a device that automatically sorts out the different colored particles in the granular materials by means of photoelectric detection technology according to the difference in the optical characteristics of the materials.The color sorter is mainly composed of feeding system, optical detection system, signal processing system and separation execution system.

The main technical indicators of the color sorter

(1) Processing capacity

The processing capacity is the number of materials that can be processed per hour, and the factors that affect the size of the processing capacity per unit time are mainly the speed of the servo system, the highest speed of the conveyor belt and the purity of the raw materials. If the servo system moves fast, it can quickly send the actuator to the corresponding position of the impurities, which can also improve the speed of the conveyor belt and increase the processing capacity, and conversely, reduce the speed of the conveyor belt. The processing capacity per unit time is proportional to the speed of the conveyor belt, and the faster the conveyor speed, the greater the output. The amount of processing per unit time is also related to the proportion of impurities contained in the raw material, if the impurities are few, the greater the interval between the two impurities, the longer the reaction time left for the servo system, which can increase the speed of the conveyor belt. At the same time, the processing capacity per unit time is closely related to the required selection accuracy.

(2) Color selection accuracy

Color accuracy refers to the number of impurities selected from the raw material as a percentage of the total impurities contained. The color selection accuracy is mainly related to the speed of the conveyor belt and the purity of the raw material, the slower the speed of the conveyor belt, the longer the time between the adjacent impurities, the servo system has enough time to remove the impurities and improve the color selection accuracy. Similarly, the higher the initial purity of the raw material, the less miscellaneous mass, the higher the color selection accuracy. At the same time, the color selection accuracy is also limited by the design of the servo system itself, when there are more than two impurities in the same frame image, only one impurity can be removed, the color selection accuracy is reduced, and the check structure is better than the single selection structure.

(3) Bring out the ratio

The take-out ratio refers to the ratio of the amount of impurities in the waste material selected by the color sorter to the amount of normal material. The level of the takeout ratio can be adjusted, mainly by adjusting the power-on time of the actuator to complete the adjustment of the takeout ratio. If the takeout ratio is set too high, it will affect the two indexes of selection rate and processing capacity. If the setting is too low, the selected waste contains too much normal material, which will cause waste; If reprocessing, need to invest a certain amount of manpower and material resources, will cause a lot of trouble and economic losses.

In the actual production process, the three indicators of processing capacity, color selection accuracy and take-out ratio are one, and they are all key indicators that must be investigated at the same time.