Brief description:The industrial co-rotating twin-screw extruder consists of several parts including the drive unit, feeding device, barrel, and screws. The functions of these components are similar to those in a single-screw extruder, as shown in Figure 1. The difference from a single-screw extruder is that the twin-screw extruder has two parallel screws placed within a barrel with an "∞" shaped cross-section.
Co-rotating Twin-screw ExtruderComposition: Transmission section and extrusion section.
1. The transmission part provides torque to the screw, and a strong torque output is the guarantee for the efficient operation of the twin-screw extruder; the extrusion part mainly consists of the barrel, screw elements, and core shaft, where the material completes plastification, mixing, and extrusion.
All of its technological advancements are also concentrated in these two parts, serving as the hallmark of the updates and iterations of the twin-screw extruder.
Compared to other models, one of its major features is the difference in the transmission system. It requires evenly distributing power to two screws within a confined space, which is known as torque distribution technology. Different torque distribution technologies determine the load capacity of the gearbox and even directly affect the lifespan and performance of the entire machine.
The extrusion section is mainly composed of the barrel, screw elements, and core shaft, serving as the functional area for plasticization and mixing in a twin-screw extruder. The screw clearance, volumetric capacity, rotational speed, strength of the core shaft, and the lifespan of the screw elements are key indicators for evaluating the performance of the extrusion section of a twin-screw extruder.
Common Issues with Industrial Co-rotating Twin-screw Extruders:
The main motor cannot start
1. Cause of occurrence:
Start-up procedure error.
(2) There is an issue with the main motor thread, communication failure
(3) The interlock device associated with the main motor is activated.
2. Treatment methods:
(1) Check the procedure and restart the machine in the correct sequence.
(2) Check the main motor circuit.
(3) Check if the lubricating oil pump has started, and inspect the status of the interlock devices related to the main motor; the motor cannot be started if the oil pump is not on.
(4) Check if the emergency button has been reset.
II. Unstable main motor current
1. Cause of occurrence:
Feeding is uneven.
(2) A certain heater has malfunctioned and is not heating.
(3) The screw adjustment shim is incorrect, or the phase is wrong, causing component interference.
2. Treatment Methods:
(1) Check the feeder and troubleshoot.
(2) Check if all heaters are working properly, and replace them if necessary.
(3) Check the adjustment pad, pull out the screw to inspect for any interference.
III. The starting current of the main motor is too high
1. Cause of occurrence:
Insufficient heating time, high torque.
(2) A certain heater is not working.
2. Treatment methods:
Before starting, manually turn the machine. If it does not turn easily, extend the heating time or check if each section of the heaters is working properly.
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).
