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Precautions for Operating and Running a Plastic Pelletizing Machine

Time：

2018-02-27

1. Is the main motor current stable (it should be kept strictly within the rated current)? If fluctuations are excessive or the current rises sharply, make appropriate adjustments by controlling the feed rate, and shut down the machine for inspection if necessary. 2. Check the gearbox, the machine body, and other rotating parts for any unusual noises. If such noises originate in the machine body, it may indicate hard foreign material mixed into the material; if they occur in the rotating parts, it could be due to bearing damage or inadequate lubrication; and if they arise inside the gearbox, it might be caused by gear wear or poor meshing. In any case, regardless of where the abnormal noise occurs, stop the machine and perform a thorough inspection and repair. 3. Pay close attention to observing or inspecting all fasteners…

1. Verify that the main motor current remains stable (it must be kept strictly within the rated current). If fluctuations are excessive or the current rises sharply, implement appropriate adjustments, such as controlling the feed rate; if necessary, shut down the equipment for inspection.

2. Inspect the gearbox, the machine body, and other rotating components for any unusual noises. If the noise originates in the machine body, it may indicate hard particles have entered the material; if it occurs in a rotating part, it could be due to bearing damage or inadequate lubrication; and if it arises inside the gearbox, it might result from gear wear or poor meshing. In short, regardless of where the abnormal noise is detected, the equipment must be shut down for inspection and repair.

3. Carefully observe or inspect all fasteners for looseness and check for any vibrations during operation.

4. Verify that the temperature control, cooling, lubrication, and other systems are functioning properly.

5. Check whether the pelletizer’s discharge is uniform.

6. During operation, proper operating records shall be maintained.

7. When cutting materials, observe safety precautions; do not use your hands or metal rods to directly assist with the process. Instead, select an appropriate method based on the material’s shape and characteristics:

① Manual material cutting

② Overflow feeding

③ Metered Feeding

④ Forced feeding

8. Before entering the processing stage, raw materials must be thoroughly cleaned to ensure they are free of foreign contaminants such as other types of plastics, waste paper, wood chips, sand, mud, and metals. Metal particles must be strictly prevented from entering the pelletizing machine. During material selection, regardless of the quantity, the materials should, in principle, remain clean and of high purity.

9. Monitor the feed of raw materials, ensure uniform feeding, maintain stable current, and keep the main motor current below its rated value.

10. During operation, if you encounter slow material discharge, rod breakage, or extrusion of adhesive from the vent, stop the machine or open the die head, raise it until the screen is exposed, and proceed with screen replacement and cleaning (this procedure must be repeated cyclically).

11. During machine testing, do not stand directly in front of the die head to operate or observe; never look into the vent opening with your eyes close to it. If necessary, use a round tube or other tubular device to divert the gas and observe from the side, strictly avoiding eye injury from hot gases or molten resin.