What is the powder packing machine working principle? To figure out the working principle of the powder packaging machine, we must first figure out the measuring method of the machine. Then, for different measurement methods, the working principle is explained in detail.
From the perspective of quantitative principles, there are two main ways: Volume type, weighing type.
- Volume type
Volumetric quantitative filling is achieved by controlling the volume of the material to be filled. Screw type quantitative filling machine belongs to the range of volumetric quantitative filling. Its advantages are simple structure, no weighing device, lower cost, and high filling efficiency. Its shortcoming is that the filling accuracy varies according to the different materials to be filled, which mainly depends on the stability of the material, the hygroscopicity of the material and the degree of looseness.
Volumetric quantitative filling is divided into two forms according to different material measurement methods. One is to control the flow or time of the material to control the filling volume. For example, the volume of the material is controlled by controlling the number of rotations or time of the screw, and the volume of the material is controlled by controlling the vibration time of the vibrating feeder. Another form is to use the same measuring container to measure materials to achieve quantitative filling, such as a graduated cylinder, a measuring cup, etc.
No matter which volumetric quantitative filling method is used, there is the same problem, which is to ensure the stability of the bulk density of the material to be filled as much as possible. In order to meet this requirement, vibration, stirring, nitrogen filling or vacuuming are often used to achieve this. If the filling accuracy is very high, it is necessary to use an automatic detection device to continuously detect the changes in the apparent specific gravity of the material to be filled, and then continuously adjust to ensure the accuracy of the filling volume.
2. Weighing type
Weighing quantitative filling is to ensure the accuracy of filling by controlling the weight of the material to be filled. Compared with the aforementioned volumetric quantitative filling, the structure is more complicated, the cost is higher, and the filling efficiency is lower than the volumetric filling. The filling objects are mainly materials with unstable bulk density and relatively high prices.
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