How to ensure that the quantitative packaging scale meets the measurement accuracy requirements

Regarding the problem of the packaging and weighing door, although the door cannot be opened, the display of the instrument is normal at this time. After careful inspection, it is found that there is a problem with the power supply of the solenoid valve that controls the material door. The corrosion of the dust on its terminals has caused the poor contact of the power supply circuit of the solenoid valve. This kind of problem can be solved as long as the wiring is re-processed.

The quantitative packaging scale is composed of a weighing unit, a trolley, a sewing bag conveying device, a pneumatic system, a dust removal system, and a quantitative packaging control instrument. Among them, the key component that affects the speed and accuracy of packaging is the weighing unit, which includes storage bins, gates, cutting devices, scales, bag clamping devices, brackets, electrical control devices, etc. The storage silo is a buffer type silo, which is used for material storage and provides a nearly uniform material flow; the gate is located at the bottom of the storage silo, and is used to seal the material in the storage silo when the equipment is overhauled or malfunctioning; The feeding device is composed of cutting hopper, cutting door, pneumatic components, air supply valve, etc. It provides fast and slow feeding in the weighing process. The material flow of fast and slow feeding can be adjusted independently to ensure quantitative The packaging scale meets the measurement accuracy requirements and speed requirements; the function of the air supply valve is to balance the air pressure difference in the system during weighing; the scale body is mainly composed of a weighing bucket, a load-bearing bracket and a load cell, which completes the adjustment of the weight to the electrical signal. It is converted and transmitted to the control unit; the bag clamping device is mainly composed of a bag clamping mechanism, pneumatic components, etc., which are used to clamp the packaging bag, so that all the weighed materials fall into the packaging bag; the electrical control device is composed of weighing display controller, It is composed of electrical components and control cabinets, which function as the control system to make the whole system work in an orderly manner according to the preset procedures.