quality Twin Screw Extruder & Twin Screw Granulator manufacturer

The screw and barrel of the extruder are designed according to the building block principle. Its thread shape, barrel structure, aspect ratio, number of feeding and exhaust positions, screen changing and pelletizing methods, and electrical instrument control mode can be optimized and adjusted according to the material system and process requirements, and the unified consideration of multi-function, multi-purpose and specific speciality is implemented, with the characteristics of high productivity and low specific energy consumption. Scope of application: blending modification (rubber blending, plastic alloy), homogeneity, plasticization, filling modification, granulation. Engineering polymer and glass fiber (carbon fiber) reinforcement. Masterbatch, functional masterbatch. Masterbatch. Special materials, powder coatings, oil pipeline coating materials. Reaction extrusion. Various cable materials. Exhaust and devolatilization post-treatment. Daily maintenance of twin-screw extruder: 1. The twin-screw extruder should be inspected once after using it for a period of time to check the tightness of all screws. 2. If there is a power outage during production, the main drive and heating will stop. When the power supply is restored, the barrel sections must be reheated to the specified temperature and kept warm for a period of time before the extruder can be started. 3. After the first 1500 hours of use of the new extruder, there will be impurities in the reducer, so the gears should be cleaned and the reducer lubricating oil should be replaced. 4. If the full degree of the steering of the instrument and the pointer is found, check whether the contact of the thermocouple and other side lines is good. 5. No debris is allowed in the material, and hard objects such as metal and sand are strictly prohibited from entering the hopper and extruder. 6. When opening the barrel cover or the exhaust cover, prevent foreign objects from falling into the main machine. 7. There must be enough preheating time, and the manual turning should be brisk before starting. Generally, the temperature should be kept constant for ~1 hour after reaching the process setting temperature. 8. The screw is only allowed to start at low speed, and the idling time shall not exceed 3 minutes.

Problems and solutions that plastic granulators are prone to in extrusion granulation. Hot cutting granulation is prone to problems in extrusion granulation. For other extrusion granulation methods, the main reason is that the pellet cooling method is different. The factors that affect the quality of the pellets are the same. Let's take a look at it together. 1. The pellets extruded by the plastic granulator are too short Reason analysis: 1. The body temperature is too high 2. The screw speed is too slow 3. There are too many cutters 4. The cutter speed is too fast Solution: 1. Reduce the body temperature of the plastic granulator 2. Increase the screw speed 3. Reduce the number of cutters 4. Reduce the cutter speed 2. The pellets are too long Reason analysis: 1. The body temperature of the plastic granulator is too low 2. The screw speed is too fast 3. There are too few cutters 4. The cutter speed is too slow Solution: 1. Increase the body temperature 2. Reduce the screw speed 3. Increase the number of cutters 4. Increase the cutter speed 3. The diameter of the pellets extruded by the plastic granulator is too different Reason analysis: 1. Porous plate hole arrangement is not appropriate 2. Porous plate aperture size is not appropriate 3. Uneven head temperature Solution: 1. Replace the porous plate and modify the aperture arrangement 2. Replace the porous plate and modify the aperture size 3. Adjust the head temperature to make it uniform IV. The particle diameter is too large Cause analysis: 1. The porous plate aperture is too large 2. The porous plate aperture compression ratio is too large 3. The screw speed is too fast Solution: 1. Replace the porous plate with a small aperture 2. Replace the porous plate 3. Reduce the screw speed V. The surface of the particles extruded by the plastic granulator is not smooth or thiourea Cause analysis 1. The body temperature is too low 2. The head temperature is too low 3. The filter mesh is too coarse 4. Filter mesh is broken 5. Irrational design of porous plate 6. Screw compression ratio is too small 7. Screw speed is too fast Solution: 1. Increase the temperature of the plastic granulator body 2. Increase the head temperature 3. Increase the number of filter meshes 4. Replace the filter 5. Increase the aperture compression ratio or the length of the straight part 6. Increase the screw compression ratio 7. Reduce the screw speed VI. Granule adhesion Cause analysis 1. The head temperature is too high 2. The screw speed is too fast 3. The particles cool too slowly 4. The cutting blade is too blunt Solution 1. Reduce the head temperature of the plastic granulator 2. Reduce the screw speed 3. Increase the cooling speed 4. Replace the cutter blade Seventh, there is a tail at the root of the pellet Cause analysis: 1. The cutter frame is uneven 2. Several cutters are installed unevenly or loosely 3. The cutter is too blunt 4. The extrusion volume is unstable Solution: 1. Adjust the cutter frame 2. Adjust the cutter or tighten the cutter 3. Replace the cutter blade 4. Adjust the extrusion volume to make it stable