Plastic granulator operation method

2021-08-05

The operation method of the plastic granulator mainly includes a series of stages such as the installation, control, trial operation, operation method, maintenance, and repair of the machine and equipment. When using the plastic granulator, attention should be paid to all aspects of the details.


Preparation work before starting the plastic granulator

The plastic raw materials used for extrusion should meet the dryness standard, and further dryness treatment should be done if necessary to remove clumped particles and mechanical equipment debris.
1. Check whether the cooling water and electrical systems of the equipment are normal to ensure that the water and air paths are unobstructed;
2. Check whether the electrical equipment system is standard, whether the electric heating system, temperature control system, and several electronic instruments are regular and reliable;
3. The auxiliary machine is empty, and the car is run at a slow speed to check whether the machine and equipment are running normally;
4. Turn on the mechanical pump of the shaping table to check whether it is normal during work;
5. add lubricating oil to the lubricating mechanical parts of the equipment, and solve the problem in time if it is found;
6. Install the machine head and shaping sleeve. According to the type, specification, and model of the product, select the specifications and model of the machine head. Install the machine head in order.

plastic granulator


Points for attention in the start-up operation of plastic granulator equipment

After the temperature is controlled, you can operate the equipment to drive. Before starting the equipment, tighten the head and the flange screws of the plastic granulator again to prevent the screws and head from sliding due to thermal expansion. Pay attention when tightening the head screws. Tighten along the diagonal evenly. When tightening the flange nuts of the machine head, please pay attention to the same tightness around the sides. Otherwise, it will slip off.

1. To start the plastic granulator, first press the "ready to start" button, then press the "start" button, then slowly turn the extruder screw and speed control knob; the extruder screw starts at a slower speed, and then Gradually speed up while loading a small amount of material. When loading materials, pay close attention to the changes in indicators indicated on the host ammeter and several control electronic instruments. The torque of the extruder screw must not exceed the red mark.
2. Before the plastic profile is extruded, it is strictly forbidden for anyone to stand in front of the die to avoid accidents caused by the screw breaking, falling off, or falling off of the raw material. After the plastic is extruded from the die position of the machine head, the extrudate needs to be slowly cooled, the traction device and the shaping die are introduced, and these devices are turned on. Afterward, each part is controlled accordingly by the prompt value of the electronic control instrument and the standard for extruding plastic products. The entire extrusion operation method meets all the standard conditions. And add enough raw materials as required.
3. The operating method of the twin-screw plastic granulator adopts a metering feeder, which can evenly distribute heavy mechanical parts such as constant speed feeding, assembly, and disassembly of the head, extruder screw, etc. The safety items to be paid attention to are: electricity, heat, The rotation of mechanical equipment and the loading and unloading of heavy mechanical parts, etc. The plastic granulator workshop must be equipped with lifting machinery and equipment. To ensure safe production.
There are differences in the critical points of the operating methods of the plastic granulator, but there are similarities.


How to judge the plasticization of the plastic granulator?

The distinction of plasticization situation requires technical experience. Some surfaces are shiny, free of impurities, no foaming, scorching, and discoloration. The extruded material is squeezed to a certain degree without burrs and cracks and has a certain degree of elasticity, which means that the material is better plasticized. If the plasticization is relatively poor, the rotation speed of the extruder screw, the working temperature of the barrel, and the screen changer can be adjusted appropriately until it meets the requirements. Regularly check whether the mechanical equipment data is normal according to the equipment requirements, and fill in the equipment maintenance record sheet. Check the quality of granular products according to product quality inspection technical specifications, and take corrective measures when problems are found.


The shutdown of granulator equipment operation

1. Squeeze out the remaining material in the granulator equipment and stop feeding. When the extruder screw is exposed, turn off the barrel and the screen changer to switch the power supply, and stop heating. Stop the extruder screw and auxiliary machine.
2. Turn off the switch power supply of the granulator equipment and auxiliary equipment, and clean the screen changer. Clean the outlet of the screen changer. In order to prevent damage to the surface of the screen changer during cleaning, first, disassemble the connecting flange of the screen changer. The remaining material in the screen changer should be cleaned with steel sheets and then use sandpaper to stick the remaining material in the screen changer. The material is ground, polished, and coated with engine oil or hydraulic oil to prevent rust.
3. After removing the screen changer, clean the extruder screw and barrel.
4. Restart the main engine, and add the stopped material (or crushed material) to clean the extruder screw and barrel. At this time, the extruder screw uses a low speed to reduce screw wear. After the stopped material is ground into powder and completely extruded, compressed air can be used to continuously blow out the residual material from the feed port and the exhaust port until there is no residual material in the barrel and the rotation speed of the extruder screw is reduced to zero. Stop the granulator equipment, turn off the main switch power supply and the main cold water valve.