Views: 1 Author: Site Editor Publish Time: 2021-07-07 Origin: Site
Which type of automatic quantitative packaging machine is better?
1. Measuring cup type quantitative packaging machine
Measuring cup type quantitative packaging machine can be divided into fixed and adjustable volume cup type quantitative packaging metering devices. The fixed measuring cup type quantitative metering device is divided into two kinds, one is suitable for the packaging of granular and powdery materials, and the other is suitable for the packaging of powdery materials. The adjustable volume cup type quantitative packaging and metering device is suitable for the packaging of granular and powdery materials whose materials have a greater impact on accuracy.
Measuring cup type quantitative packaging metering device has simple structure, fast metering speed, low cost, but low accuracy (generally 3%-1.5%).
2. Rotary drum quantitative packaging machine
Rotary drum type quantitative packaging machine relies on the sealed cavity formed by the outer thread of the drum and the inner surface of the shell to realize the measurement. Suitable for packing materials with stable density and good fluidity. Rotary drum type quantitative packaging and metering devices are divided into fan-shaped rotary drum quantitative packaging and metering devices and cylindrical rotary drum quantitative packaging and metering devices with an adjustable trough section.
3. Plunger type quantitative packaging machine
It is more suitable for the packaging of materials with low fluidity, easy to agglomerate and plunger phenomena such as bridging.
4. Screw type quantitative packaging machine
The screw quantitative packaging machine is a device that uses a screw feeder to complete the measurement. In each charging cycle, as long as the number of revolutions of the screw is accurately controlled, the required measurement can be obtained. The device has a short charging distance, seldom raises dust, and has a fast speed, which is suitable for packaging powdery materials. However, the machining accuracy and cost of the metering screw are high.
The above four automatic quantitative packaging machines are all non-continuous blanking solutions, which are beneficial to the horizontal sealing of bag making and packaging, and can ensure that the volume of the material in the metering cavity is consistent with the volume of the material falling into the packaging bag. Although it has a simple structure, flexible action, fast measurement speed, and low cost, the manufacturing error of the measurement cavity and the density change of the material will directly affect the measurement accuracy, and it is only suitable for occasions with low quantitative requirements.
5. Weighing quantitative packaging machine
The weighing type quantitative packaging machine adopts a quantitative weighing method for changing or moving materials. It is suitable for the measurement of materials that are easy to absorb moisture and agglomerate, uneven particles and large changes in apparent density. Its structure is complicated, the measurement speed is slow, the cost is high, but the accuracy is high (up to 1% to 0.1%).
With the advancement of science and technology and the use of combination scales, not only the measuring speed of the weighing dynamic measuring device is increased, but the cost is greatly reduced. Therefore, dynamic measurement packaging, as the development direction of the packaging industry, will surely be able to develop rapidly and continuously improve. Of course, according to different materials and different accuracy requirements, we can choose different dosing devices to meet the different needs of the packaging industry.