Views:6 Author:Site Editor Publish Time: 2018-05-02 Origin:Site
In the extrusion production process, may appear extruder screw suddenly card die. At this point, if the Extruder protection device does not play a role, the operator should be immediately shut down. More often than not, the screw can rotate, but the speed slows down, while the sound of the piercing metal scraping, the current rises sharply,
At this point the operator should stop immediately. This occurs because:
1: Foreign body into the barrel, card dead screw, if it is iron metal foreign bodies, screw and barrel will cause great damage
2: Screw or barrel deformation
3: The barrel temperature is too low, or the filter plate is blocked, causes the barrel pressure to rise sharply, causes the screw deformation
4: Screw, barrel design unreasonable, easy to happen is the screw design compression ratio too large, in the use of screw deformation. 5: barrel and screw materials used in the thermal expansion coefficient of the difference is too large, the heating time barrel feed seat because there is cooling, and if the screw does not cool, then it is possible to embrace death.