Working Principle
Plunger Filling Principle: The piston is driven by an air cylinder to draw materials into the metering cylinder body. Then, the piston is pushed by pneumatics to inject the liquid fertilizer into the container through the feeding pipe. The filling volume is determined by adjusting the stroke of the air cylinder.
Gravity Filling Principle: Utilizing the self-gravity of the liquid fertilizer, filling is carried out under atmospheric pressure relying on the weight of the liquid itself. It can be divided into two types: timed filling and constant volume filling, which is suitable for filling liquid fertilizers with low viscosity and no gas.
Pressure Filling Principle: Filling is carried out under a pressure higher than atmospheric pressure, and it is divided into isobaric filling and differential pressure filling. In isobaric filling, the pressure in the liquid storage cylinder is equal to the pressure in the bottle, and the liquid flows into the bottle by its own weight; in differential pressure filling, the pressure in the liquid storage cylinder is higher than the pressure in the bottle, and the liquid flows into the bottle due to the pressure difference. This is suitable for filling liquid fertilizers containing gas or liquid fertilizers with high viscosity.
Magnetic Pump Filling Principle: A high-precision miniature magnetic pump is used, and the filling volume is determined by the pump speed and the working time of the pump. The pump head has no shaft connection with the motor and is driven by magnetic force, which can ensure the filling accuracy.
Classification
Classification by Degree of Automation: There are fully automatic liquid fertilizer filling machines and semi-automatic liquid fertilizer filling machines. The fully automatic filling machine can achieve fully automatic operations from bottle feeding, filling, capping to labeling, with high production efficiency and is suitable for large-scale production; the semi-automatic filling machine requires manual assistance to complete some operations, such as manually loading and unloading bottles, etc., and is suitable for small and medium-scale production or occasions with higher requirements for flexibility.
Classification by Filling Principle: It includes vacuum filling machines, normal pressure filling machines, pressure filling machines, etc. Vacuum filling machines are suitable for filling toxic, corrosive, and volatile liquid fertilizers; normal pressure filling machines are suitable for liquid fertilizers with low viscosity and no gas; pressure filling machines are suitable for liquid fertilizers containing gas or liquid fertilizers with high viscosity.
Classification by the Number of Filling Heads: There are single-head filling machines and multi-head filling machines. The single-head filling machine has a simple structure and a relatively low price, but its production efficiency is relatively low; the multi-head filling machine can fill multiple containers simultaneously, with high production efficiency and is suitable for large-scale production.
Features
High-precision Metering: Advanced metering systems, such as high-precision positive displacement flow meters and electronic weighing sensors, are adopted to accurately control the filling volume, ensuring that the filling volume of each bottle of liquid fertilizer is accurate, and the error can be controlled within a small range.
Wide Application Range: It can adapt to liquid fertilizers with different viscosities and properties, such as thin foliar fertilizers, viscous topdressing fertilizers, etc., and can also fill containers of different shapes and specifications, such as glass bottles, plastic bottles, plastic barrels, etc.
Hygienic and Environmentally Friendly: The parts in contact with the liquid fertilizer are all made of high-quality stainless steel materials, which meet food hygiene standards and environmental protection requirements. They are corrosion-resistant and easy to clean, avoiding the corrosion of the equipment by the fertilizer and the pollution of the fertilizer by the equipment.
High Degree of Automation: Equipped with a PLC control system and a touch screen human-machine interface, it can achieve one-touch operation, conveniently and quickly complete the setting, adjustment, and monitoring of filling parameters, and can also be linked with front-end and back-end equipment such as the feeding system, bottle unscrambler, capping machine, labeling machine, etc., to realize the automated operation of the entire filling production line.
