How does the Screw Extruder Side Feeder increase the bulk density of powders through negative pressure feeding?

1. Overview of negative pressure feeding technology
In traditional extrusion systems, the feeding of low-density materials such as powders often faces many challenges. Because the powder particles are finer and the bulk density is lower, it often cannot enter the extruder screw area as smoothly as materials with larger particles.

The Screw Extruder Side Feeder can effectively solve these problems by adopting negative pressure feeding technology. Negative pressure feeding technology is to apply negative pressure in the material pipe so that the material is sucked into the barrel of the extruder through the pipe. Because negative pressure can guide the powder into the screw area with less resistance, it avoids the common blockage and poor material flow in traditional feeding systems.

2. How does negative pressure feeding increase the bulk density of powders?
Powder materials usually have a low bulk density and are prone to loose stacking, resulting in uneven feeding and affecting production efficiency. Negative pressure feeding technology can effectively improve the bulk density of powder through the following aspects:

2.1 Attraction accelerates material flow
In the negative pressure feeding system, by applying a certain negative pressure to the material pipe, the material is quickly sucked into the screw area under the action of physical suction. Due to the guiding effect of negative pressure, the fluidity of the powder material is improved, which not only speeds up the material conveying speed, but also effectively reduces the gaps between the materials, thereby increasing the bulk density of the material.

2.2 Close arrangement reduces the void ratio
Another important function of negative pressure feeding is to arrange the particles in the powder closely together. Normally, powder materials have a low bulk density due to their tiny particles and the gaps between the particles. However, under the action of negative pressure, when the powder particles are sucked in and pass through the feeding pipe, the gaps in the air are compressed, and the gaps between the materials gradually decrease.

2.3 Improve the fluidity and uniformity of the material
Powder materials are usually prone to adhesion or agglomeration due to air or static electricity, resulting in uneven flow. Negative pressure feeding technology can destroy the adhesion between materials by applying negative pressure, so that the materials flow more evenly. Before entering the screw, the powder has been sucked in and evenly distributed under the action of negative pressure, which can ensure the stability and uniformity of the feed and avoid uneven material during the feeding process.

3. The actual effect of negative pressure feeding to improve the bulk density
Through negative pressure feeding technology, Screw Extruder Side Feeder can effectively improve the bulk density of powder and achieve higher feeding efficiency. The specific performance is as follows:

3.1 Improve the feeding efficiency of materials
Due to the increase in bulk density, powder materials can enter the screw area of ​​the extruder faster and more stably per unit time. This not only increases the feeding rate of materials, but also reduces the downtime caused by insufficient materials.

3.2 Reduce material waste
As the bulk density of materials increases, the utilization rate of powders is also enhanced. Negative pressure feeding technology avoids the material waste caused by loose material stacking or uneven feeding in traditional feeding systems.

3.3 Improve material fluidity and stability
Another advantage of the negative pressure feeding system is that it can effectively solve the problem of unstable flow of powders during feeding. Through the effect of negative pressure, the material can enter the extruder evenly and stably, avoiding production interruptions or quality problems caused by uneven material flow or blockage.