As a conveying machine, the PVC mixing machine should understand its working rules. The screw feeder is simple in structure, easy to operate, does not need lubrication, and has low power consumption; The ore loading amount can be adjusted evenly; Therefore, it has been widely used. It is generally used for loose materials. According to the performance requirements of PVC mixer equipment, the pressure of materials on the tank body shall be minimized in the configuration design. According to the requirements of the manufacturer, the effective discharge port of the warehouse materials shall not be greater than one fourth of the width of the tank, and the flow speed of materials shall be controlled within a certain range. For materials with large feeding amount, the discharge place at the bottom of the PVC mixer silo shall be provided with a high ore blocking plate; In order not to affect the performance of the feeder, the ore blocking plate shall not be fixed on the tank. Regularly check whether the clearance changes, whether there is too much dust, and whether the spring plate is broken. PVC mixer controller shall be placed in a place with less dust, no humidity, no high temperature and good ventilation, and dust shall be cleaned frequently. It is required to check whether the three big jacking bolts and the connecting screws of important parts that tighten the spring plate are loose every day. The material bin of PVC mixing machine is not allowed to be emptied, and a certain material position should be kept to prevent the impact of materials on the material trough. If the core armature of PVC mixing machine has a collision sound, it should be repaired immediately.