Powder vacuum weighing systems offer advantages such as a short process flow, high weighing accuracy, high reliability, flexible equipment layout, and significant reduction in plant height requirements. Depending on the position of the weighing device in the vacuum weighing system, various configurations—such as addition scales or subtraction scales—can be assembled to meet different customer requirements.

The system consists of components such as a feeding station or material storage silo, a vacuum feeder weighing device, and a PLC controller. It can perform automatic feeding and batching tasks, including single-material fixed-weight feeding or multi-material formulation batching. It is widely used in industries such as pharmaceuticals, food, chemicals, battery materials, building materials, metallurgy, and feed processing.

The equipment features automatic weighing and conveying functions, enabling seamless integration use with other devices.

Within the system, the feeder is a commonly used device in material feeding, processing, and packaging processes, especially for powdered materials. As many materials require precise weight control during addition, existing feeders often incorporate weighing structures. However, issues such as overfeeding or underfeeding frequently occur during the material addition process. This places high demands on conveying equipment. Modifying the conveying equipment itself can be costly, so auxiliary devices are often considered to assist in more accurate feeding.

The powder vacuum weighing system includes a feed hopper equipped with a load cell on its side. Above the hopper, a screw feeding device is installed. Below the outlet of the screw feeding device, a small-dose feeding tray device is positioned. This tray device is mounted on a base, which is movably arranged beneath the screw feeder.

The small-dose feeding tray device comprises a tilted tray connected to an installation shaft. The shaft is driven to oscillate horizontally by a vibration device mounted on the base. Above the tray, a small hopper is installed, and at its outlet, a retractable baffle is placed perpendicular to the tray.

In this automatic weighing feeder, the small-dose feeding tray device located below the screw feeder utilizes the horizontal vibration of the tilted tray to achieve small-dose feeding. This continues until the material in the feed hopper reaches the weight set by the load cell.