Screw extrusion granulator is a widely used equipment in industrial production, mainly used to process powder materials into granular products. However, during use, some common problems may be encountered, such as uneven particles, screw blockage, and mold wear. If these issues are not resolved in a timely manner, they may affect production efficiency and product quality. This article will provide a detailed introduction to the troubleshooting and problem-solving techniques for these issues.

1、 Uneven particles

Particle unevenness refers to the uneven size and shape of particles during the granulation process, which may be caused by uneven material mixing, inconsistent die aperture, or uneven screw speed.

Check material mixing

Ensure that the materials are thoroughly mixed before entering the screw extrusion granulator. If the materials are mixed unevenly, it may result in inconsistent particle size and shape. Mixing equipment can be used to pre mix materials to ensure their uniformity.

Check the aperture of the mold head

Check if the aperture of the mold head is consistent. Inconsistent aperture of the mold head may lead to uneven particle size. If there is a difference in the aperture of the mold head, tools can be used to adjust or replace it with a new mold head.

Adjust the screw speed

Adjust the screw speed to ensure even flow of materials in the screw. Excessive or insufficient screw speed can lead to uneven particle distribution. Adjust the screw speed according to the characteristics of the material and production requirements to ensure the uniformity of the particles.

regular maintenance

Regularly maintain the equipment, including cleaning and inspecting key components such as molds and screws. Regular maintenance can reduce the risk of uneven particles, improve production efficiency and product quality.

2、 Screw blockage

Screw blockage refers to the material clumping in the screw, causing the screw to malfunction. This may be caused by high material humidity, large particle size, or low screw speed.

Control material humidity

Ensure that the humidity of the material is within the appropriate range. Materials with high humidity are prone to clumping, leading to screw blockage. If the humidity of the material is high, it can be dried to reduce the humidity.

Control material particle size

Ensure that the particle size of the material meets the equipment requirements. Materials with excessively large particle sizes may stay in the screw for too long and clump together. Before entering the screw extrusion granulator, screening equipment can be used to remove oversized particles.

Adjust the screw speed

Properly increase the screw speed to avoid material clumping due to prolonged residence in the screw. Adjust the screw speed according to the characteristics of the material and production requirements to ensure smooth material flow.

regular cleanup

Regularly clean the screw and barrel to remove residual materials and impurities. Cleaning can prevent materials from clumping inside the equipment and reduce the risk of screw blockage.

3、 Die wear

Mold wear refers to the gradual wear of the mold head over long-term use, resulting in inconsistent particle shape and size. This may be due to high material hardness, poor mold material, or prolonged use.

Choose the appropriate mold material

Select the appropriate mold material based on the characteristics of the material. Materials with higher hardness may require more wear-resistant mold materials, such as hard alloys or stainless steel.

Regularly inspect molds

Regularly inspect the wear of molds and replace severely worn molds in a timely manner. Regular inspections can reduce the impact of mold wear on production and improve product quality.

Optimize mold design

Optimize mold design based on material characteristics and production requirements. Reasonable die aperture and shape can reduce mold wear and improve particle uniformity.

regular maintenance

Regularly maintain the equipment, including cleaning and inspecting key components such as molds and screws. Regular maintenance can extend the service life of molds and reduce the risk of mold wear.

4、 Conclusion

Screw extrusion granulators play an important role in industrial production, but problems such as uneven particle size, screw blockage, and mold wear may be encountered during use. By checking material mixing, mold aperture, screw speed, material humidity, particle size, and mold material, these issues can be effectively addressed to ensure production efficiency and product quality.