What Is Liquid Filling Machinery?
Liquid filling machinery is a type of metered-dose filling machinery that is used to fill liquids. A metered-dose filling machine is a filling machine that can measure and fill a certain amount of liquid using a scale.
There are two types of quantitative filling machines: automatic filling machines and semi-automatic filling machines. Automatic filling machines are those in which filling containers flow through a conveyor line and start filling automatically when they reach a certain position. Semi-automatic filling machines, on the other hand, automatically flow from the conveyor line to the filling location, but the filling start operation is performed manually.
Uses of Liquid Filling Machinery
Liquid filling machinery is used by many manufacturers who produce and sell something liquid. For example, water or oil. These are filled using head pressure from a pump or tank. Liquids can also have high or low viscosity. For liquids with high viscosity, such as honey and candy, the viscosity can be lowered by increasing the temperature or by pumping.
Some liquids, such as miso and bean paste, are semi-solids but can be filled. In such cases, a screw is installed in the tank to prevent blockage.
Principle of Liquid Filling Machinery
Liquid filling machinery fills a tank or hopper. The liquid is filled from the tank or hopper through piping to the filling nozzle. When the filling process is started, the nozzle valve opens, and the liquid begins to fill. When the amount of liquid is reached, a signal is sent from the weighing device to stop filling.
The weighing instrument of the metering machine is strictly regulated. This is necessary to maintain the accuracy of filling quantities by preventing the filling of slightly smaller quantities for shipment to suppliers. Therefore, the weighing instruments used for metering machines must be certified. This is issued only after verification by a weighing organization.
Weighing instruments often use load cells. Load cells can convert the force caused by a load into an electrical signal. Load cells have a strain gauge, an electrical resistance strain gauge (sensor), attached to a metal body and measure the change in resistance. Compared to conventional spring-loaded load cells, the new load cell is much more accurate.