Single and twin screw feeders - the "throat" of the powder industry

In the production and processing of chemicals, plastic granulation, etc., whether powders, granules and fiber materials can be accurately conveyed is the key to process stability. Traditional volumetric feeding equipment often faces problems such as bridging, agglomeration, and large precision errors. Single and twin screw feeders have become the preferred solution for complex material conveying with their modular screw configuration and intelligent control technology.

About the working principle of single and twin screw feeders:
Single screw feeder
Power transmission: Relying on the friction between the material and the inner wall of the barrel to form a drag flow conveyor, the material in the screw groove is plasticized by shear heating.
Material transportation trajectory: It is advanced along a single spiral path, and has efficient conveying capacity for granular materials with good fluidity, but it is easy to cause retention for materials with high viscosity.
Pressure control: Materials are prone to reflux under high pressure, and need to be combined with a specific compression section design to improve stability.
Twin-screw feeder
Material forced conveying: The meshing screw forms an "∞"-shaped material conveying trajectory, and achieves precise quantitative conveying through the positive displacement pump effect, which is especially suitable for the conveying of powder and short fibers.
Dynamic mixing: The co-rotating screws produce a high shear rate in the meshing area to achieve uniform dispersion of the components in the premix.
Self-cleaning mechanism: The reverse-moving screw fins can remove excess attached materials, and the residual amount is small, which can effectively avoid cross-contamination of materials.

When the feeder evolves from a simple conveying device to an intelligent body with decision-making and learning capabilities, it is not only the power source of the production line, but also the decision-making center of process optimization. This machine innovation driven by precision machinery and intelligent algorithms is redefining the efficiency boundary of continuous production.