The weighing double cone pneumatic mixing system has a very wide range of structural compatibility for quantitative packaging. For powdered and ultrafine powder materials, appropriate feeding mechanisms and auxiliary mechanisms (such as arch breaking and air extraction devices) should be selected based on the different characteristics of the materials (particle size, bulk density, bulk density, etc.). For some powdered materials with low bulk density and strong adsorption force on the warehouse wall, appropriate feeding mechanisms and auxiliary mechanisms should be selected. The mixing system adopts specialized instruments for weighing control, and the reaction pot has powerful functions for handling the packaging process: setting the target weight of any packaging, automatically removing tare weight from the reaction pot, automatically correcting errors, and controlling the feeding execution mechanism with multiple speed outputs. It also has the function of prohibiting sampling time setting to eliminate the impact of hopper vibration and material flushing on measurement accuracy, and has functions such as out of tolerance output alarm. It is equipped with multiple communication interfaces for communication with the upper computer and corresponding operating software, which can be easily connected to the central control system of the complete production line. Instruments with excellent performance, coupled with reliable frequency conversion (servo) control technology, run within the rigorous logic program of programmable logic controller (PLC), making the operation process of the automatic mixing system intelligent, reliable, and stable; Make manual operation very simple. At the same time, full attention should be paid to the suppression of gas inside the packaging bag: natural gas return channels, active pumping and filtration (including pumping during the metering process and pumping during the sealing process), and great attention should be paid to controlling dust pollution in the on-site operating environment.

The weighing mixer includes a mixing device, a hopper scale, a control device, and a reading device. The mixing device is installed inside the hopper scale, and both the mixing device and the hopper scale are electrically connected to the control device and controlled by the control device. The reading device receives signals from the hopper scale and displays the weight value. The mixing device includes a cylinder, and a driving mechanism is installed at the top of the cylinder. The cylinder is equipped with a transmission mechanism and a mixing mechanism, and the driving mechanism is connected to the mixing mechanism through the transmission mechanism; The driving mechanism includes a first driving motor and a second driving motor. The first driving motor is set at the center of the top of the cylinder, and the second driving motor is parallel to one side of the first driving motor; The transmission mechanism includes a first transmission shaft and a second transmission shaft. The first transmission shaft is connected to the first drive motor for transmission, the second transmission shaft sleeve is connected to the outside of the first transmission shaft, and the second drive motor is connected to the second transmission shaft through a horizontally arranged transmission gear chain; The mixing mechanism includes rotating blades and a rotating frame. The rotating blades are fixedly set at the bottom of the first transmission shaft, and the rotating frame is fixedly connected to the second transmission shaft. The top of the cylinder is equipped with a feeding port, and a switchable valve is installed outside the feeding port. An anti fall net is installed inside the feeding port, which is set between the upper end of the rotating frame and the feeding port. The anti fall net is parallel to the upper surface of the cylinder. The bottom of the cylinder is equipped with a discharge port, and a switch valve is installed outside the discharge port. The hopper scale includes a load-bearing seat, a weighing module, and a signal transmitter. The cylinder is set on the load-bearing seat, and the weighing module is set between the load-bearing seat and the cylinder. The signal transmitter sends the value of the weighing module to the reading device. The control device includes a console, which controls the first drive motor, the second drive motor, and the switching valve. The reading device includes a signal receiver and a weighing display. The signal receiver receives the signal from the signal transmitter, and the weighing display is electrically connected to the signal receiver.