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How To Operate the Plastic Granulator Correctly?
The operation of the plastic granulator
The operation of the plastic granulator includes a series of links such as machine equipment, adjustment, test run, operation, protection, and repair, and special attention should be paid to its characteristics when using the granulator. It is very important to grasp the key to the operation of the granulator. Because the mechanical equipment is naturally worn out, and the wear to a certain degree will show problems, and the reasonable and correct operation method will greatly reduce the wear rate. , Extend the service life of the machine, the specific methods are as follows:
1. Preparatory work for the operation of the pelletizer: the plastic used for extrusion molding should pay attention to its boring question. The primary raw material should reach the required boring demand, and further boring if necessary. The plastics agency Chi Mei 757 can be divided into two types: thermoset and thermoplastic. The former cannot be reshaped and used, and the latter can be reproduced. Thermoplasticity has a relatively large physical elongation, generally between 50% and 500%. The force does not completely change linearly under different elongations. The material is sieved to remove agglomerates and mechanical impurities.
2. When the granulator is operating, check whether the water, electricity, and gas systems in the equipment are normal to ensure that the water and gas paths are clear and leak-free, whether the electrical system is normal, whether the heating system, temperature control, and various appearances are reliable. ; Auxiliary machine empty car low-speed test operation, investigate whether the equipment is operating normally; start the vacuum pump of the sizing table, investigate whether the operation is normal; add oil to the smooth parts of the equipment, and the color is slippery.
3. Install the head and sizing sleeve. Choose the standard of the machine head according to the type and size of the product. Install the machine head in the following order.
4. Start-up of granulator operation control.
5. After the constant temperature, you can start driving. Before driving, you should tighten the head and the pelletizer, also called flange or flange bolts, to eliminate the difference in thermal expansion between the bolts and the head, and tighten the order of the head bolts. Tighten diagonally, with even force. When tightening the flange nut of the machine head, it needs to be tightened nearby, otherwise, the material will run out.
6. When the granulator is operating, press the; prepare to start; button, then connect to the; start; button, and then slowly rotate the screw speed adjustment knob to start the screw speed slowly. Most of the plastics from imported plastics agencies are light, chemically stable, and will not rust; good impact resistance; good transparency and abrasion resistance; good insulation and low thermal conductivity; general moldability and colorability, The processing cost is low; and then gradually accelerate, and a small number of materials are added together. When feeding, pay close attention to the changing status of the host ammeter and various indicator heads. The screw torque cannot exceed the red mark. During the operation of the granulator, no one is allowed to stand in front of the die before the plastic profile is extruded, to avoid damage caused by the bolt (composition: head and screw) being broken or the material is wet and bubbled. After the Chimei 757 plastic is extruded from the die, the extrudate needs to be gradually cooled and led to the traction equipment and the shaping die, and these equipment are activated. Then according to the indication value of the control appearance and the demand for extruded products. Adjust each part accordingly to make the entire extrusion operation reach normal conditions. And add enough material according to the demand, the operation of the twin-screw granulator selects the metering feeder to feed the material evenly and at the same speed.
7. When installing and disassembling the head, screw, and other bulky parts, the safety items that should be paid attention to during the operation and control of the granulator is electrical, thermal, mechanical transformation and the handling of bulky parts. The granulator workshop must be equipped with lifting equipment. To ensure safe production. The key to the operation of the granulator is different, but there are also similarities. Plastic machinery industry information briefly introduces you to the same operation method when extruding various products and the key to the operation of the granulator that should be paid attention to. When manufacturing different plastic products.
8. The start-up of the granulator can usually be judged based on the appearance of the extruded material. When the die is uniform and the plastic is excellent, it can be traction set. The judgment of the degree of plasticization depends on experience. That is to say, the appearance is shiny, free of impurities, no foaming, burnt material, and discoloration. The extruded material is squeezed to a certain level by hand without burrs or cracks, and it has a certain elasticity. At this moment, the material is excellent in plasticization. If the plasticization is not good, the screw speed, barrel, and head temperature can be adjusted appropriately until it reaches the demand. Check whether various technical parameters are normal according to technical requirements. And fill in the technical record sheet. Check the quality of the profile products according to the quality inspection standards, and adopt the solutions in time if any doubts are found.
9. Stop the operation of the granulator, squeeze out the plastic in the granulator, and stop the feeding of the granulator. When the screw is exposed, the barrel and the power supply of the machine head are closed to stop heating. Stop the operation of the screw and auxiliary machine. Enclose the granulator and auxiliary power supply.
10. Install the machine head. Organize the perforated plates and the various parts of the machine head. In order to avoid damaging the inner and outer surfaces of the machine head when finishing, turn over the connecting flange of the machine head. The remaining materials in the machine head are arranged with steel rules and steel sheets, and then the plastic adhered to the machine head is polished with sandpaper, and then coated with engine oil or silicon oil to prevent rust. After removing the head, the screw and barrel are arranged. Restart the main engine and add parking materials to clean the screw and barrel. At this moment, the screw is selected at a low speed to reduce wear. After the parking material is crushed into powder and extruded thoroughly, compressed air can be used to repeatedly blow out the remaining pellets and powder from the feeding port and the exhaust port until there is no residual material in the barrel, then reduce the screw speed to zero and stop manufacturing. Granulator closed the main power supply and main cold water valve.
In addition to grasping the operation control strategy of the granulator, knowing the fault analysis of the plastic granulator, the cause of the occurrence, and the treatment method is the method to extend the service life and normal operation of the granulator.
1. Preparatory work for the operation of the pelletizer: the plastic used for extrusion molding should pay attention to its boring question. The primary raw material should reach the required boring demand, and further boring if necessary. The plastics agency Chi Mei 757 can be divided into two types: thermoset and thermoplastic. The former cannot be reshaped and used, and the latter can be reproduced. Thermoplasticity has a relatively large physical elongation, generally between 50% and 500%. The force does not completely change linearly under different elongations. The material is sieved to remove agglomerates and mechanical impurities.
2. When the granulator is operating, check whether the water, electricity, and gas systems in the equipment are normal to ensure that the water and gas paths are clear and leak-free, whether the electrical system is normal, whether the heating system, temperature control, and various appearances are reliable. ; Auxiliary machine empty car low-speed test operation, investigate whether the equipment is operating normally; start the vacuum pump of the sizing table, investigate whether the operation is normal; add oil to the smooth parts of the equipment, and the color is slippery.
3. Install the head and sizing sleeve. Choose the standard of the machine head according to the type and size of the product. Install the machine head in the following order.
4. Start-up of granulator operation control.
5. After the constant temperature, you can start driving. Before driving, you should tighten the head and the pelletizer, also called flange or flange bolts, to eliminate the difference in thermal expansion between the bolts and the head, and tighten the order of the head bolts. Tighten diagonally, with even force. When tightening the flange nut of the machine head, it needs to be tightened nearby, otherwise, the material will run out.
6. When the granulator is operating, press the; prepare to start; button, then connect to the; start; button, and then slowly rotate the screw speed adjustment knob to start the screw speed slowly. Most of the plastics from imported plastics agencies are light, chemically stable, and will not rust; good impact resistance; good transparency and abrasion resistance; good insulation and low thermal conductivity; general moldability and colorability, The processing cost is low; and then gradually accelerate, and a small number of materials are added together. When feeding, pay close attention to the changing status of the host ammeter and various indicator heads. The screw torque cannot exceed the red mark. During the operation of the granulator, no one is allowed to stand in front of the die before the plastic profile is extruded, to avoid damage caused by the bolt (composition: head and screw) being broken or the material is wet and bubbled. After the Chimei 757 plastic is extruded from the die, the extrudate needs to be gradually cooled and led to the traction equipment and the shaping die, and these equipment are activated. Then according to the indication value of the control appearance and the demand for extruded products. Adjust each part accordingly to make the entire extrusion operation reach normal conditions. And add enough material according to the demand, the operation of the twin-screw granulator selects the metering feeder to feed the material evenly and at the same speed.
7. When installing and disassembling the head, screw, and other bulky parts, the safety items that should be paid attention to during the operation and control of the granulator is electrical, thermal, mechanical transformation and the handling of bulky parts. The granulator workshop must be equipped with lifting equipment. To ensure safe production. The key to the operation of the granulator is different, but there are also similarities. Plastic machinery industry information briefly introduces you to the same operation method when extruding various products and the key to the operation of the granulator that should be paid attention to. When manufacturing different plastic products.
8. The start-up of the granulator can usually be judged based on the appearance of the extruded material. When the die is uniform and the plastic is excellent, it can be traction set. The judgment of the degree of plasticization depends on experience. That is to say, the appearance is shiny, free of impurities, no foaming, burnt material, and discoloration. The extruded material is squeezed to a certain level by hand without burrs or cracks, and it has a certain elasticity. At this moment, the material is excellent in plasticization. If the plasticization is not good, the screw speed, barrel, and head temperature can be adjusted appropriately until it reaches the demand. Check whether various technical parameters are normal according to technical requirements. And fill in the technical record sheet. Check the quality of the profile products according to the quality inspection standards, and adopt the solutions in time if any doubts are found.
9. Stop the operation of the granulator, squeeze out the plastic in the granulator, and stop the feeding of the granulator. When the screw is exposed, the barrel and the power supply of the machine head are closed to stop heating. Stop the operation of the screw and auxiliary machine. Enclose the granulator and auxiliary power supply.
10. Install the machine head. Organize the perforated plates and the various parts of the machine head. In order to avoid damaging the inner and outer surfaces of the machine head when finishing, turn over the connecting flange of the machine head. The remaining materials in the machine head are arranged with steel rules and steel sheets, and then the plastic adhered to the machine head is polished with sandpaper, and then coated with engine oil or silicon oil to prevent rust. After removing the head, the screw and barrel are arranged. Restart the main engine and add parking materials to clean the screw and barrel. At this moment, the screw is selected at a low speed to reduce wear. After the parking material is crushed into powder and extruded thoroughly, compressed air can be used to repeatedly blow out the remaining pellets and powder from the feeding port and the exhaust port until there is no residual material in the barrel, then reduce the screw speed to zero and stop manufacturing. Granulator closed the main power supply and main cold water valve.
In addition to grasping the operation control strategy of the granulator, knowing the fault analysis of the plastic granulator, the cause of the occurrence, and the treatment method is the method to extend the service life and normal operation of the granulator.
Reference: kknews
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