1. Using a mother and child machine, double screw feeding
2. The gearbox is good, the gears inside must undergo heat treatment, and the bearings are adjustable
3. The gearbox, screw, barrel, nose, and worn parts should be treated with strength to ensure a lifespan of at least 1 year
4. The main components should be made of standard materials
1) Screw: It is the main component of the extruder, which directly affects the application range and productivity of the extruder. It is made of high-strength and corrosion-resistant alloy steel.
2) Tube: It is a metal cylinder, generally made of heat-resistant, pressure resistant, strong, wear-resistant, and corrosion-resistant alloy steel or composite steel pipes lined with alloy steel. The tube is matched with a screw to achieve the crushing, softening, melting, plasticizing, exhaust, and compaction of plastic, and continuously and uniformly transport the rubber material to the forming system. The length of the tube is generally 15-30 times its diameter, in order to fully heat and plasticize the plastic. So it is necessary to choose alloy steel that is wear-resistant, corrosion-resistant, and has minimal deformation when working in high-temperature environments.
3) Hopper: The bottom of the hopper is equipped with a cutoff device for adjusting and cutting off the material flow, and the side of the hopper is equipped with a sight hole and a calibration measuring device.
4) Head and mold: The head is composed of an alloy steel inner sleeve and a carbon steel outer sleeve. The head is equipped with a molding mold, and the function of the head is to convert the rotating plastic melt into parallel linear motion, evenly and smoothly introduce it into the mold sleeve, and give the plastic the necessary molding pressure. The plastic is plasticized and compacted in the barrel, and flows into the head molding mold through a porous filter plate along a certain flow channel through the head neck. The mold core and mold sleeve are appropriately matched to form a circular gap with a continuously decreasing cross-section, so that the plastic melt forms a continuous and dense tubular coating layer around the core wire. To ensure the rationality of the plastic flow channel in the head and eliminate dead corners where plastic accumulates, a diversion sleeve is often installed. To eliminate pressure fluctuations during plastic extrusion, a pressure equalization ring is also set up. The machine head is also equipped with a device for mold calibration and adjustment, Easy to adjust and calibrate the concentricity of the mold core and mold sleeve.
5. Choosing a professional manufacturer to produce the reducer and assembling it by the granulator manufacturer themselves is more conducive to quality assurance and after-sales maintenance
6. We need a power distribution cabinet
7. The key to equipment is good quality of screws and barrels
8. The washing machine must have continuous production without stopping to change water. Use a cleaning water tank, otherwise the efficiency will be extremely low
9. Heating should be divided into sections, and the segmented heating should be uniform and controllable
10. There should be a matching waste plastic cleaning machine that uses circulating water and does not require the discharge of sewage
11. Efficient and energy-saving
12. The aspect ratio of the machine should be reasonable (the screw length is a multiple of the screw diameter)
13. The larger the model, the higher the output
14. We need dual exhausts
15. The heating power of the granulator flange (die) is very important and should be designed at 2.5W per square centimeter (cross-sectional area)