The Working Principle Of Powder Packaging Machine
May 17, 2022
(1), volumetric powder packaging machine
Volumetric quantitative filling is to achieve quantitative filling by controlling the volume of the material to be filled. Screw type quantitative filling machine belongs to the category of volumetric quantitative filling. Its advantages are simple structure, no need for weighing device, low cost and filling efficiency. high. The disadvantage of the screw type quantitative filling machine is that the filling accuracy varies greatly depending on the material to be filled, which mainly depends on the stability of the specific gravity of the material to be filled, the uniformity of the size of the material particles, and the hygroscopicity and looseness of the material. and other characteristics. Therefore, the main applicable objects of volumetric filling are the material particles with uniform particle size, relatively stable bulk density and relatively good self-fluidity.
Volumetric quantitative filling packaging is divided into two forms according to the different measurement methods of materials. One is to control the flow or time of the material to be filled to control the filling volume, for example, by controlling the number of revolutions or time of the screw of the screw filling machine to control the volume of the filling material, and by controlling the vibration time of the vibrating feeder to control the volume of the material Wait. Another form is to use the same measuring container to measure the material to achieve quantitative filling, such as a measuring cylinder, a measuring cup or a plunger type quantitative filling machine.
No matter which volumetric quantitative filling method is used, there is the same problem, that is to try to ensure the stability of the bulk density of the material to be filled. In order to achieve this requirement, vibration, stirring, nitrogen filling or vacuuming are often used to accomplish. If the filling accuracy is very high, it is necessary to use an automatic detection device to continuously detect the change of the apparent specific gravity of the material to be filled, and then continuously adjust to ensure the accuracy of the filling volume.
(2) Weighing powder packaging machine
Weighing quantitative filling is to ensure the filling accuracy by controlling the weight of the material to be filled. Compared with the volumetric quantitative filling mentioned above, the structure is more complex, the cost is higher, and the filling efficiency is lower than that of the volumetric filling. The filling objects are mainly materials with uneven particle size, unstable bulk density and relatively high price. At present, there are mainly three kinds of scales used for weighing quantitative filling, which are mechanical lever scales, electronic scales and mechanical-electronic combined scales. According to the different feeding methods, it is divided into single-stage feeding and multi-stage feeding. In order to improve the quantitative accuracy and feeding speed, dynamic weighing with multi-stage feeding and weighing while feeding is generally used.
