How to choose a suitable single screw plastic granulator

To choose a suitable single screw plastic granulator, you need to consider many factors. Here are some suggestions:

Raw material characteristics
Type: Different plastic raw materials have different physical and chemical properties. For example, single screw granulators are basically applicable to general plastics such as PP and PE; for heat-sensitive plastics such as PVC, you need to choose a granulator with a special temperature control design to avoid material decomposition.

Shape and size: When the raw material is powder, the spiral angle of the screw can be appropriately larger to increase the conveying speed; when the raw material is blocky or the particles are large, you should choose a granulator with a large feed port and strong screw conveying capacity.

Humidity and impurity content: For raw materials with high humidity, you need to choose a granulator with a drying device or a matching drying device; for raw materials with many impurities, you need to consider the wear resistance of the screw and barrel and the accuracy and convenience of the filter device.

Production capacity
Production demand: Determine the output according to its own production scale and market demand. For example, small enterprises or laboratories can choose a small single-screw granulator with an output of tens of kilograms per hour; large production enterprises need to choose large equipment with an output of hundreds of kilograms or even tons per hour.

Production efficiency: In addition to output, granulation cycle is also an important indicator for measuring production efficiency. Efficient granulators have fast speeds and close connections in plasticization, extrusion, and granulation, and can produce a large number of qualified granules in a short time.

Product quality requirements
Plasticization effect: The quality of granules with sufficient plasticization and uniformity is good. A granulator with a suitable screw length-to-diameter ratio, accurate heating and temperature control system, and good mixing effect should be selected to ensure the quality stability of the product.

Particle shape and size: If the particle shape and size accuracy are high, it is necessary to pay attention to the granulator's granulation device, such as the number of flying knives, rotation speed, blade material, etc., and also consider the design and manufacturing accuracy of the mold.

Equipment performance and quality
Screw and barrel: The screw and barrel are core components. Products with excellent materials, strong wear resistance and high hardness should be selected. Their manufacturing accuracy and assembly quality will also affect the performance and service life of the equipment.

Heating and temperature control system: According to the production raw materials and process requirements, select a granulator with suitable heating method. At the same time, the accuracy and stability of the temperature control system should be good to ensure accurate temperature control of the material during processing.

-Transmission system: The transmission system should be stable and reliable, with low noise and high transmission efficiency. The quality of key components such as reducers and bearings should be good to ensure the long-term stable operation of the equipment.

Degree of automation
Operational convenience: Granulators with high degree of automation are simple to operate and have low labor intensity. For example, PLC control systems and visual interfaces can be used to realize real-time monitoring and parameter adjustment of the production process.

Fault diagnosis and early warning: Equipment with fault diagnosis and early warning functions can detect and prompt faults in time, facilitate rapid maintenance, and reduce downtime and losses.

Energy consumption
Heating method: Different heating methods have different energy consumption, such as electric heating, steam heating, hot oil circulation heating, etc. The appropriate heating method should be selected according to the energy supply and cost of the production site.

Energy-saving design: The energy-saving design of the equipment is also very important, such as the use of efficient heating elements, optimized screw structure, reasonable transmission system, etc., which can reduce the energy consumption of the equipment and save production costs.

Price and after-sales service
Price factors: It is necessary to comprehensively consider the performance, quality, production capacity, etc. of the equipment, and choose products with high cost performance, and avoid simply pursuing low prices while ignoring equipment quality and after-sales service.

After-sales service: It is necessary to choose a manufacturer with perfect after-sales service, including equipment installation and commissioning, operation training, warranty period, maintenance response time, etc., to ensure the normal use and long-term operation of the equipment.