Plastic vacuum feeder is an automated conveying device. Its core feature is to use the negative pressure airflow generated by vacuum to extract plastic raw materials from the storage container and convey them to the target location such as the injection molding machine hopper through a closed pipeline. It includes a vacuum generator, a conveying pipeline, a separation filter device and a control system, aiming to achieve clean and efficient transfer of raw materials.
The hopper is the key receiving component of the plastic vacuum feeder, which is used to temporarily accommodate the conveyed plastic raw materials. Its design capacity is limited. When the hopper is overloaded and the material height exceeds its preset safety space, multiple operation interferences may occur.
Excessive material may touch or block the vacuum feed port on the upper part of the hopper or the built-in material level detection device. This directly hinders the smooth formation or flow path of the vacuum negative pressure airflow. The vacuum degree is therefore reduced, affecting the normal fluidization movement of the material in the pipeline and disrupting the stable and continuous conveying process. At the same time, the risk of fine powder material spilling in an overfilled state increases, which may contaminate the filter components.
Continuous overload operation of the hopper will also interfere with the automatic control logic of the equipment. The material level sensor failed due to being buried by the material and could not accurately send out the signal to stop feeding or start discharging, which caused the plastic vacuum feeder cycle to be disrupted. The vacuum feeder relies on the precise balance of airflow and material, and the overcapacity of the hopper breaks this balance.