Brief Description: The Nanjing twin-screw extruder consists of several parts, including the transmission device, feeding device, barrel, and screws. The functions of these components are similar to those of a single-screw extruder, and its structure is shown in Figure 1. The difference from a single-screw extruder is that the twin-screw extruder has two parallel screws placed in a barrel with an "∞"-shaped cross-section.
Structural Features of Nanjing Twin-screw Extruder:
1. The main machine features high-speed co-rotating twin screws, which generate intense and complex material transfer, exchange, diversion, mixing, and shear kneading effects in various threads and mixing elements. These effects can be fully and freely adjusted by changing the screw configuration and operating conditions to meet various process requirements.
2. Accurate metering and reasonable feeding methods are key to strictly following the formula and ensuring product quality. According to the material properties and user needs, we provide various feeding methods, such as volumetric metering and dynamic loss-in-weight metering, to meet the needs of different products.
3. Advanced control system. The extruder is equipped with an advanced and aesthetically pleasing control system, with most control components being imported, ensuring high quality and sensitivity. The operating parameters of the main machine, such as current, voltage, temperature, and torque, are very intuitive, making operation very convenient and requiring minimal operator skill.
4. The system is equipped with several pelletizing methods, including wire drawing water cooling, hot cutting water cooling, and hot cutting air cooling. It can be configured according to different materials and user requirements.
Maintenance:
⒈ The extruder should be placed in a well-ventilated location to ensure the motor's heat dissipation and prolong its life; the machine should be well grounded.
⒉ Regularly check the screws of the cutting tools. After using the new machine for 1 hour, use tools to tighten the screws of the moving and fixed blades to ensure their stability with the blade holder; regularly lubricate the bearings to ensure their lubrication; to maintain the sharpness of the cutting blades, regularly check the blades to ensure their sharpness and reduce unnecessary damage to other components due to dull blades; regularly check if the belt is loose and tighten it in time.
⒊ Restarting——Before the second start of the blades, clear the remaining debris in the machine chamber to reduce the starting resistance. Regularly open the inertia cover and pulley cover to clean the ash outlet below the flange, as the powder discharged from the crusher chamber enters the shaft bearings.
⒋ Replacing parts——When replacing the cutting tools, the gap between the moving and fixed blades: 0.8MM is recommended for crushers above 20HP, and 0.5MM is recommended for crushers below 20HP. The thinner the recycled material, the larger the gap can be adjusted.
Main Motor of Nanjing Twin-screw Extruder Cannot Start
1. Causes:
(1) Incorrect startup procedure.
(2) Issues with the main motor circuit, communication failure.
(3) Interlocking devices related to the main motor are activated.
2. Solutions:
(1) Check the procedure and restart according to the correct startup sequence.
(2) Check the main motor circuit.
(3) Check if the lubricating oil pump is started, check the status of the interlocking devices related to the main motor; the motor cannot start if the oil pump is not running.
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).
