Brief description:Underwater 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 well-received in the waste plastic recycling industry as a versatile plastic recycling machine.
Underwater plastic pelletizerFeatures:
All recycled materials can be processed for production without the need for spin-drying or baking/drying after sorting and crushing washing, suitable for both dry and wet use.
2. From raw material crushing, washing, feeding to pelletizing, the entire process is automated.
3. Make full use of the high-pressure friction continuous temperature rise system for automatic heating production, avoiding continuous heating and saving electricity.
4. It adopts a split-type fully automatic power distribution system to ensure the safe and normal operation of the motor.
5. The screw and barrel are both made of imported high-strength, high-quality carbon structural steel, ensuring durability and longevity.
6. The machine has an attractive and elegant appearance. It can be painted in colors according to customer requirements.
Operating Procedures:
The underwater pelletizing equipment operates at a high temperature (up to 300°C) and requires approximately one hour to cool down after the heat medium is stopped. Therefore, personnel working near the pelletizer must wear protective clothing and heat-insulating gloves.
2. Before starting the machine, staff should check if any rotating parts of the underwater pelletizing equipment are loose to prevent injury during operation.
3. Check if the phenolic board supporting the steel belt is severely worn.
4. The operator must manually rotate and test the outer drum before starting the machine to prevent overload.
5. Before starting the operation, the operator must inspect the upper and lower surfaces of the steel belt, remove any debris from the steel belt, and strictly prohibit any foreign objects on the upper surface of the steel belt from being carried into the space between the steel belt and the drum.
6. Operators should ensure that their gloves, sleeves, and other attire are neat and kept away from rotating mechanical parts, especially avoiding contact with the high-speed rotating outer cylinder to prevent entrapment and injury.
7. The material and heat medium temperatures are high; keep a safe distance to avoid burns.
8. The outer rotating drum is a thin-walled cylinder that must be handled with care. Any impact could cause deformation, resulting in the loss of its pelletizing function. It is strictly forbidden to heat the outer rotating drum with fire.
9. The underwater pelletizing equipment distributor is a slender rod, and it is strictly prohibited to press or collide with it, causing deformation that would result in the loss of its pelletizing function.
10. It is strictly prohibited to start the machine without cooling water.
Underwater plastic pelletizerAnalysis of Common Fault Causes and Solutions
Main motor torque too high
Cause Analysis:
Failures in the oil lubrication system, poor alignment between the main motor output shaft and the gearbox input/output shaft, and vibrations from the motor and clutch can all damage the main motor bearings, leading to excessive torque. Additionally, an overly heavy feeding load or poor material melting can also result in excessive torque on the main motor.
Solution:
Regularly inspect and clean the lubrication system, measure the main motor bearings with a vibration meter and infrared thermometer, and create trend charts. If the trend values are exceeded, measure whether the no-load current or power of the main motor exceeds the specified value to determine if the bearing needs to be replaced. Regularly check the alignment between the output shaft of the main motor and the input shaft of the gearbox, and check the alignment after three months of operation or after replacing the bearing. Conduct electrical tests to identify the cause of rotor imbalance; perform vibration velocity testing on the clutch, and if it exceeds the specified value, readjust the dynamic balance. Regularly inspect the barrel heating and cooling systems to ensure uniform heating and complete melting of the material. If, at the moment the extruder starts, the main motor power curve and melt pressure curve suddenly increase, this indicates that the feeding amount of the feeding system is too high, and the feeding amount should be reduced.
Main motor torque too low
Cause Analysis:
A failure in the feeding system that causes the twin screws to run idle will result in excessively low torque of the main motor.
Solution:
Check and determine if there is a malfunction in the additive system or the main material feeding system, and clear any blockages.
Friction clutch failure
Cause Analysis:
The instantaneous start voltage of the main motor being too low, overheating of the friction disc and friction plates, aging of the friction disc and friction plates, and insufficient air pressure on the friction disc can all lead to the disengagement of the clutch.
Solution:
When starting the main motor, it should be done outside of peak electricity usage times, and the feeding load should be reduced. The interval for restarting should be at least 30 minutes; during summer, if the main motor is started more than twice, the interval should be extended, or a fan should be used to force cooling. Use instrument air to blow and a cloth to clean the surface of the friction plates and discs. If there is significant wear or a "glazing" phenomenon on the surface, the friction disc and friction plates should be replaced. Confirm that the air pressure value can ensure the friction disc and friction plates are in contact.
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).
