Low smoke halogen-free granulator | Low smoke halogen-free machinery factory | Low smoke halogen-free cable material granulator

1. After hours of use, there will be iron filings or other impurities ground from the gears in the reduction box. Therefore, the gears should be cleaned and the lubricating oil of the reduction box should be replaced. 2. After using it for a period of time, conduct a comprehensive inspection of the extruder to check the tightness of all screws.
3. If there is a sudden power outage during production, the main drive and heating stop. When the power is restored, each section of the barrel must be reheated to the specified temperature and kept warm for a period of time before the extruder can be started.
4. If the steering of the instrument and pointer is found to be full, check whether the contact of the thermocouple and other side lines is good.
Twin-screw extruders can be classified according to whether they are meshed or not, whether the rotation directions are in the same direction or in opposite directions, and whether the screw axes are parallel:
Whether the axes of parallel twin-screws are parallel or not, and whether the axes of parallel twin-screws are parallel or not, and the meshing type of conical twin-screws in opposite directions. Rotating, parallel twin-screws are divided into fully meshing and partially meshing types, non-meshing type co-rotating and outward rotating, counter-rotating and inward rotating are rarely used
Meshing type co-rotating twin-screw extruder: due to co-rotating The speed of the rotating twin screws at the meshing point is opposite. One screw pulls the material into the meshing gap, while the other screw pushes the material out of the gap. As a result, the material moves from one screw to the other screw and advances in a shape. . Since the gap in the meshing area is very small, the speed directions of the thread and the groove at the meshing area are opposite, so it has a high shearing speed and has a good self-cleaning effect, that is, it can scrape off any accumulation of material adhered to the screw, thereby The residence time of the material is very short, so the intermeshing co-rotating twin-screw extruder is mainly used for mixing and granulation.
. Meshing type counter-rotating twin-screw extruder. In the meshing counter-rotating twin-screw extruder, the two screws are symmetrical. Due to the different directions of rotation, the spiral path of the material on one screw is diverted by the other. The helix of a screw is blocked and cannot form a font movement. In the solid conveying part, the material is conveyed forward in the form of an approximate closed chamber. However, in the design, a certain amount of gap is left between the outer diameter of one screw and the root diameter of the other screw so that the material can pass. When the material passes through the radial gap between the two screws, it is subject to strong shear. , stirring and calendering, so the material plasticizes better. At the same time, it obtains the compression ratio by gradually reducing the pitch, and is mostly used for processing products.
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