The weighing feeding machine is mainly composed of a large bag unloading machine, granular material silo, vacuum feeding equipment, buffer hopper, liquid level gauge, feeding device, metering hopper, unloading valve and electrical control system, etc. The weighing system uses a large bag unloader to remove plastic shavings from the flexible ton bags (1.0). Then, the plastic shavings are conveyed to a 20-meter-high collection hopper through vacuum feeding. The metering hopper is precisely fed by the feeding equipment below the collection hopper to ensure that the weight of the material in the hopper scale reaches the set weight. Finally, the material is conveyed to the reaction tank through the discharge valve.

In view of the unstable quality uniformity of the tire blanks produced by the molding process in the tire industry, a tire blank quality loading system was designed.Through the combined use of dynamic weighing technology and information control technology, automatic collection of quality is achieved. At the same time, statistical algorithms such as normal distribution are used to analyze the weighing data, and timely alarms are issued for tire failures with abnormal quality.Actual use results show that the system has high reliability and is conducive to improving the tire blank qualification rate.

Two kinds of PVC powder feeding systems, dense phase pneumatic feeding system and thin phase pneumatic feeding system, are introduced. Through the comparison of the two in terms of investment, energy consumption, environmental protection and impact on product quality, it is pointed out that dense phase pneumatic feeding system has more advantages in PVC powder transportation.

The automatic filling machine is a metering and filling system that uses mechatronics technology.A programmable controller (PLC) and weighing instrument are used to form a measurement and control weighing and filling machine to complete the production process of weighing, measuring and filling of slices.

It is a feasible method to use hydraulic calibration device to calibrate the hopper scale. The hydraulic calibration device consists of a set (including 3-4 head) hydraulic jack device, a set (including 3-4 head) pressure sensor and a digital display. A small platform for placing pressure sensors and hydraulic jacks is welded above the vertical axis frame of the hopper scale weighing module. The lower part of the platform support is welded directly to the weighing frame of the hopper scale weighing module, and 3 (or 4) pressure sensors are connected to the display. The upper part of the jack gently touches the upper part of the platform support, and the display shows zero. The hydraulic jack pressure device simultaneously exerts pressure on the 3 sides (or 4 sides), and the load is uniformly applied to the pressure sensor and on the scale body. The load value read out by the display of the hydraulic calibration device of the pressure sensor is used as the payload value applied to the scale body. The weighing module of the hopper scale converts the load into an electrical signal output according to a certain proportion, which is displayed by the weighing display.

The screw feeder adopts distributed control, integrating PLC technology and frequency conversion speed regulation technology. The computer realizes the ratio setting and start-stop action of the weighing instrument. The PLC realizes on-site dynamic pictures and displays the equipment operating status, and can implement fixed value, configuration Ratio and material type settings.