Brief Description:Underwater industrial plastic pelletizers are mainly used for processing waste plastic films (industrial packaging films, agricultural mulch films, greenhouse films, beer packaging, shopping bags, etc.), woven bags, agricultural convenience bags, basins, buckets, beverage bottles, furniture, and daily necessities. They are suitable for most common types of waste plastics and are widely used and popular in the recycled plastic industry as versatile plastic recycling machinery.
When the operator is feeding the material, they must ensure no foreign objects enter the material and control the temperature properly.
2. If the material does not form strips and sticks to the die head when the machine is first turned on, it is due to the die head temperature being too high. The issue can be resolved by allowing a slight cooling, and in most cases, there is no need to stop the machine.
3. The water temperature should generally be between 50-60°C. If it is too low, the strips may break; if it is too high, they may stick together. When starting the machine, half of the water added should be hot. If this is not possible, manually feed the material into the pelletizer for a while until the water temperature rises, and then let it automatically cut the pellets to avoid breaking the strips. Once the water temperature exceeds 60°C, add cold water to the circulation to maintain the temperature.
4. When pelletizing, the strands must be evenly pulled before entering the cutting rolls; otherwise, the pelletizer will be damaged. If material is violently spewing out from the vent hole, it indicates that impurities have clogged the filter screen. At this point, the machine must be stopped immediately to replace the screen, which can be selected with a mesh size of 40-60.
Common Causes of Faults in Underwater Industrial Plastic Pelletizers
In underwater pelletizing units, the reasons for the disengagement of the friction clutch and the interlock shutdown of the unit during operation can be categorized into four major types:
Main motor system failure
1. The main motor torque is too high or too low;
2. The main motor speed is too low;
3. The main motor bearing temperature is too high;
4. The main motor winding temperature is too high;
5. The inlet and outlet temperatures of the main motor water cooler are too high;
6. The outlet flow of the main motor bearing lubricating oil pump is too low;
7. The outlet pressure of the main motor bearing lubricating oil pump is too low;
8. The leakage rate of the main motor water cooler is too high.
Transmission system failure
1. The gearbox shift lever position is off-center;
2. The instrument air pressure for the friction clutch is too high;
3. The speed difference of the friction clutch is too large;
4. The outlet pressure of the gearbox lubricating oil pump is too low;
5. The outlet oil temperature of the gearbox lubricating oil pump is too high;
6. Internal failure of the friction clutch, etc.
Screw process section failure of the extrusion granulator
1. The melt pressure before and after the throttle valve is too high;
2. The melt pressure at the die head is too high;
3. The melt pressure difference before and after the screen changer is too large;
4. Starting valve rotation failure, etc.
Underwater pelletizer system failure
1. The granulator motor winding temperature is too high.
2. The granulator speed is too low.
3. The granulator torque is too high.
4. Automatic switching of the pellet water bypass has failed.
5. The pellet water pressure is too high or too low.
6. The pellet water flow is too low.
7. The granulator clamping bolts are not tightened.
8. The granulator bypass water valve is not closed.
9. The granulator hydraulic clamping pressure is too low.
10. The granulator motor has failed.
11. The hydraulic knife axial feed pressure is too low.
Nanjing Xintuo Intelligent Equipment Co., Ltd. was established on May 29, 2020, with Zhou Xianting as the legal representative. The registered capital is 10 million RMB, and the unified social credit code is 91320113MA21LF2H92. The company is located in the Baima Town Industrial Concentration Zone, Lishui District, Nanjing City. It belongs to the other manufacturing industry. Its business scope includes: Permitted projects: import and export of goods; import and export of technology (projects that require approval by relevant departments can only be carried out after obtaining such approval, specific business items are subject to the approval results). General projects: sales of intelligent material handling equipment; research and development of machinery and equipment; general equipment manufacturing (excluding special equipment manufacturing); specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); sales of metal products; wholesale of electronic components; sales of instruments and meters; sales of artificial intelligence hardware; processing and sales of mechanical parts and components; general component manufacturing; sales of plastic products; production and sales of Class I medical devices; sales of Class II medical devices; sales of health supplies and disposable medical supplies; sales of special labor protective equipment; technical services, technical development, technical consultation, technical exchange, technology transfer, and technology promotion (except for projects that require approval, activities can be conducted independently according to the business license). The current operating status of Nanjing Xintuo Intelligent Equipment Co., Ltd. is active (in operation, open, registered).
