The batching process of the weighing Feeder is intermittent, that is, the batching of the next the first mock examination can only be carried out after the batching of the materials of each the first mock examination is completed and discharged. During automatic operation, based on the raw material formula data given by the weighing scale, modify the ingredient weight on the touch screen, press the start operation button, and the material pump frequency converter works. The powder slurry begins to enter the quantitative hopper scale, and the PLC detects the weighing data of the hopper scale. The powder slurry is quickly added first, and when it approaches the given weight value of the formula (such as a difference of ≤ 10%), the speed of the slurry pump frequency converter is adjusted according to the pre prepared control table, thus ensuring both the feeding speed of the slurry and the measurement accuracy. When the dosage reaches the given weight of the formula, the slurry pump frequency converter stops running, and the powder slurry measurement is completed. Subsequently, the pneumatic valve for discharging the slurry hopper scale is opened, and the powder slurry is fed into the batching tank. At the same time as measuring the powder slurry, the measurement of other powders also begins simultaneously. The weighing feeder adopts the reduction method. When the feeding hopper scale is transported from the silo, the variable frequency hopper scale is weighed. Then, when the stainless steel hopper scale releases the material to the batching tank, the hopper scale is weighed again to calculate the unloading weight. The tubular screw conveyor from the anti explosion hopper scale to the batching tank is driven by the variable frequency drive, similar to the measurement process of the slurry. The material is quickly added first, and when it approaches the given weight value of the formula (such as the difference ≤ 10%), the speed of the powder pump variable frequency drive is adjusted according to the pre prepared control table to complete the feeding quickly and accurately. The feeding process of other powders is similar to this. In order to ensure that the raw materials do not settle, the mixing impeller in the batching tank starts to stir while the powder slurry is being discharged. To achieve good chemical reaction results, the temperature inside the batching tank is most suitable at around 45 ℃. Continue mixing for 3 minutes, and finally add the mixed aluminum powder solution manually. After 1 minute, open the pouring valve, pour the mixture into the mold truck, and the the first mock examination pouring is completed.

The weighing feeder has the functions of feeding, weighing ratio, and fully automatic online weighing of mixed materials. There is a fixed speed hopper scale below the suction feeder, which can temporarily store materials and ensure the continuity of feeding; The outlet of the measuring screw enters the hopper scale for weighing, and the measuring screw discharges uniformly with high feeding accuracy. The electronic weighing scale has a large measuring range, and the combination of the two can achieve precise feeding. After the hopper scale fully mixes the materials, the mixing tank realizes the final feeding output. The weighing feeder adopts a suction hopper, a storage orchid, a speed regulating hopper scale, and a mixing hopper. The lower part of the suction hopper is connected to the feeding hopper scale, and the discharge end of the measuring hopper scale can be connected to at least one feeding end of the measuring screw. The discharge end of the measuring screw is connected to the feeding end of the precision control hopper scale, and the lower part of the regulating hopper scale is connected to the mixing hopper. The discharge end of the mixing hopper is connected to the feeding end of the mixing tank, and the mixing hopper and mixing tank are linked to each other for stability. The extrusion amount can improve the longitudinal uniformity of the film thickness, and the measuring screw can accurately discharge the material. The measuring screw adopts a motor, a machine base, a screw sleeve, and a conveying screw. The upper part of the machine base is equipped with a feeding and side connecting screw sleeve, and the feeding port is connected to the screw sleeve. The motor is connected to the conveying screw, and the conveying screw passes through the screw sleeve. There is a feeding gap between the conveying screw and the screw sleeve. The motor is installed in a motor unit for dust prevention. Both the motor unit and the motor are connected to the motor base, which is connected to the side of the machine base. The motor is connected to the conveying screw through a coupling.

In order to improve the feeding accuracy, the weighing feeder is equipped with at least one set of measuring screws or one measuring valve between the storage hopper and the spiral hopper scale. The measuring screws or valves are both set above the feeding hopper scale, and the measuring valve is equipped with a cleaning port. The measuring screw or valve is set above the hopper scale. The measuring valve and measuring screw can be combined to achieve high batching accuracy. The ingredient hopper scale can achieve one-time proportioning of multiple materials. Each screw hopper scale is connected to a suction feeder, and the feeding method of one material, one hopper can ensure the singularity of raw materials. Each hopper scale can be connected to the feeding end of the measuring screw or measuring valve (some are equipped with measuring screws, some are equipped with measuring valves). The powder hopper scale can be set up with multiple according to user needs, and is also equipped with measuring screws or measuring valves. The quantity is determined according to the usage requirements, so that the conversion of ingredient specifications is fast and the film cost is low. The middle part of the given hopper scale is suspended on a rack, and an explosion-proof weighing scale is installed below the rack. The upper end of the feeding hopper scale is open for direct feeding, and the middle part of the bulk material hopper scale is sleeved on a support frame. A waterproof weighing scale is installed under the outer wall of the support frame and the hopper scale to facilitate the overall weighing of various components of the material. The lower end of the reduction hopper scale is inserted into the upper opening of the mixing hopper, and the lower end of the hopper scale is equipped with a pneumatic valve body (or solenoid valve), which opens after weighing. The upper opening of the mixing hopper is connected to the hopper scale through a pneumatic valve body, and the discharge port at the lower end is flexibly inserted into the feeding port of the mixing tank. Additionally, a double-layer Weighing system is installed between the bottom of the mixing hopper and the frame. The side wall of the mixing hopper is equipped with a mixing mechanism, which can fully realize the mixing of materials. The weighing and limiting of the mixed materials can be achieved through the bottom scale of the mixing hopper. The evenly mixed materials directly enter the mixing tank to ensure the uniformity of the raw materials. A control unit is used, and the suction feeder, measuring screw, and mixing hopper are respectively connected to the control unit for communication, which facilitates the automation control of the equipment.