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What are the assembly and disassembly steps and precautions of the twin-screw granulator?

by:TENGDA     2022-12-13

When disassembling the screw, the main machine should be drained as much as possible, and then the main machine and auxiliary machines should be stopped, and the power switch of the electric heater of the machine head should be disconnected and pressed. These are the precautions during the assembly and disassembly process. Only by paying attention to these can the twin-screw granulate The machine can be used better, the following TENGDA Plastic Extruder Machine Manufacturers will briefly introduce the assembly and disassembly steps and precautions of the twin-screw extruder for you.

Assembly and disassembly of twin-screw granulator:

1. Remove the temperature-measuring and pressure-measuring element of the machine head and the cast aluminum heater, wear thick asbestos gloves, remove the machine head assembly, add paraffin wax in time while it is hot, wipe with a wire brush and cotton cloth, clean the inside of the machine head hole and the machine Clean up the material at the end of the head screw.

2. Loosen the fastening screws on the shaft ends of the two sleeve spline couplings and the sealing glands at the ends of the two screws, and observe the two output shafts of the transmission box. The left side is the A shaft, and the right side is the B shaft.

3. The assembly configuration of the two screws must be exactly the same. When assembling, the inner hole of each component and the surface of the mandrel must be coated with a thin layer of high-temperature resistant lubricant. The joints should be smooth without dislocation. Tighten the screw head screw last.

4. After resuming heating the machine head to the set temperature, you can drive according to the normal procedure.

5. After the screw is installed, it should be turned manually to make the screw rotate for more than 2 circles. After confirming that there is no abnormal phenomenon such as interference and scraping, the machine head can be installed. During installation, molybdenum disulfide lubricant should be evenly applied to the surface of each screw thread.

Precautions during the assembly and disassembly of the twin-screw granulator:

1. The main motor and the oil pump motor are electrically interlocked, that is, the oil pump motor does not start, the main motor cannot start; the main motor does not stop, the oil pump motor cannot stop.

2. The main motor and the feeding motor are electrically interlocked, that is, the main motor does not start, and the feeding motor cannot start; the main motor of the feeding motor does not stop, and the main motor cannot stop.

3. The main motor control cabinet has overcurrent protection, which has been set before leaving the factory. In addition, it also has a mechanical protection device, generally a nylon shear pin type safety coupling. When the design torque is exceeded, the shear pin is cut off and the transmission box stops working.

4. When the head pressure exceeds the set alarm value, the material pressure alarm signal light will be on and the machine will stop automatically.

5. It is strictly forbidden to bring any metal debris into the raw materials produced by users.

6. When the machine is running, it is strictly forbidden to use metal objects to clean the material at the opening of the cylinder.

7. Assembly and disassembly of pressure sensor and material temperature thermocouple. When there is material in the machine head, it must be heated, and the installation and disassembly can only be carried out after the material softens.

8. Please use demineralized water or distilled water for the circulating water of the cylinder cooling system.

9. The screw is only allowed to start at a low speed, and the idling time does not exceed 2 minutes. After feeding, the machine is ready to discharge the material from the head die hole, so that the speed can be gradually increased.

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You can get a of any specification from Nanjing Tengda Machinery Co., Ltd. as we have varied specifications to suit different plastic extruder machine manufacturers needs and cater to a wide client base existing in both domestic and overseas market. please feel free to enquire us at TENGDA Extruder Machine Manufacturers.
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