Powder packaging machines are widely used in the food, pharmaceutical, chemical, and daily chemical industries. Common products include milk powder, flour, seasoning powder, protein powder, and laundry detergent. Depending on the characteristics of different powders, the equipment needs to achieve precise metering and efficient sealing packaging.
1. Stable Material Feeding
Powder enters the equipment through the hopper. The hopper is typically equipped with a stirring device to prevent bridging and blockage, ensuring uniform material feeding.
2. Screw Precision Metering System (Core Component)
The screw metering system is the core of the entire equipment. Its principle is as follows:
A servo motor drives the screw to rotate.
The rotation speed and number of revolutions are controlled according to set parameters.
Powder is continuously pushed out at a fixed volume.
Since the output volume per revolution is relatively fixed, stable quantitative output can be achieved.
For high-precision requirements, a weighing feedback system can be added for fine-tuning compensation, further improving metering accuracy.
Advantages of screw metering:
High metering accuracy
Adaptable to powders of different densities
Suitable for non-free-flowing powders
Wide adjustment range (from small to large doses)
Strong stability and low repeatability error
Applicable products include:
Milk powder, protein powder, meal replacement powder
Seasoning powder, spices
Chemical powders, additives
Pharmaceutical raw material powders
3. Bag Making and Filling Process
In a vertical small bag powder packaging machine:
The packaging film is formed by the forming device.
Horizontal and vertical sealing are completed.
The screw fills the bag quantitatively.
Packaging is complete.
The entire process is automatic and continuous, suitable for medium- and high-speed production needs.
Powder packaging machines employing screw metering systems can achieve stable material feeding, precise metering, and highly efficient automated production, making them particularly suitable for powder products with poor flowability or high precision requirements.
Through proper selection and configuration, production efficiency can be effectively improved, material waste reduced, and product consistency enhanced, making it an important equipment solution in the powder packaging industry.
