Disassembly of extruder screw elements

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The screw of the extrusion granulator is composed of multiple sections, combined helical elements assembled in a modular fashion. The core of the screw consists of a single spline shaft; the length of this shaft varies depending on the model, ranging from 5 to 8 meters. The splines on the helical elements are fitted onto this spline shaft. Once all the helical elements have been installed on the spline shaft, a lock nut is used to secure these elements to the shaft. During locking, a constant-torque pulling mandrel is used, and the lock nut is tightened to complete the process. Therefore, when disassembling the screw element, a constant-torque tensioning mandrel is also used; once the mandrel has been stretched to the position where the locking nut stops, the locking nut can be unscrewed by giving it a gentle tap. It is crucial to note that the stretching force is calculated based on factors such as the mandrel, component type, and material strength, and it must not be changed arbitrarily. To avoid damage to the spiral element or mandrel. , polypropylene