With the development of society and the progress of science and technology. At present, most of the products use mechanical filling instead of the original manual operation, which improves the productivity, ensures the product quality, and reduces the mutual pollution between the production environment and the packed materials. Classification of filling machines: different filling materials (including liquid containing gas, liquid without gas, paste, etc.) and different packaging containers (bottles, cans, boxes, barrels, bags, etc.), the types of filling machines used are also different. Generally, the classification methods of filling machines are as follows:
1. According to the structure: linear filling machine, rotary filling machine
2. According to the quantitative device: cup filling machine, liquid level filling machine, rotor filling machine, plunger filling machine
3. According to the number of filling valve heads: single head filling machine and multi head filling machine
4. According to the filling principle: vacuum filling machine, normal pressure filling machine, back pressure filling machine, negative pressure filling machine and pressure filling machine
5. According to the structure of feeding cylinder: single chamber feeding filling machine, double chamber feeding filling machine and multi chamber feeding filling machine
6. According to the degree of automation: manual filling machine, semi-automatic filling machine, automatic filling machine, filling pressure filling machine
7. According to the lifting structure of packaging container: slide type lifting filling machine, pneumatic lifting filling machine, sliding way pneumatic combination lifting filling machine. The reasonable selection of filling machine is an important way to ensure product quality and improve economic benefits. Generally speaking, should be closely linked to the actual production, as far as possible to choose good quality, high efficiency, simple structure, easy to use and maintain, small volume, light weight of the filling machine.