Ⅰ.Matters needing attention in extruder screw refurbishment and polishing matters
1. In order to avoid scratching and burning the surface of the extruder screw workpiece, it should be specially care of polishing with #1200 and #1500 sandpaper. It is therefore necessary to load a light load. The surface of the extruder screw is polished by a two-step polishing method. When polishing with each type of sandpaper, it should be polished twice along two different directions, with each rotation of 45° to 90° between the two directions.
2. When changing to different types of sandpaper, the polishing direction of the extruder screw should be changed to 45°~ 90°, so that the stripes and shadows left after polishing of the former type of sandpaper can be distinguished. Before changing to a different type of sandpaper, the polished surface must be carefully wiped with 100% pure cotton dipped in a cleaning solution such as alcohol, as a small grit left on the surface can ruin the entire subsequent polishing. This cleaning process is also important when the extruder screw is polished from sandpaper to diamond paste. All particles and kerosene must be completely cleaned before the polishing continues.
3. The extruder screw sandpaper polishing needs to use soft wood or bamboo rod. When polishing a circle or sphere, it is better to use a cork bar to match the radian of the circle and sphere. And harder wood, like cherry wood, is more suitable for smooth surface polishing. Trim the ends of the strips so that they fit into the shape of the surface of the steel. This prevents the sharp angles of the strips (or bamboo) from touching the surface of the steel and causing deep scratches.
Ⅱ. How to remove the debris in the extruder screw?
Generally speaking, we are in the extrusion of a period of time to extruder, screw out, and clean the PE, and then clean extruder screw barrel things with cloth wrapped long rod. It should be better to do this a few times. Alternatively, you can choose to use the same resin as the main material used in extrusion to make the cleaning material. In the cleaning material made of it, the filler (calcium carbonate) should be added more. Add more lubricant in addition, like PE wax, stearic acid, paraffin and so on.
In terms of production specifications, LESUN not only can provide the general extruder screw, the manufacturer's standard double-screw extruder accessories, but also can provide the design and manufacture of special extruder accessories according to the customer's requirements. At the same time, we also provide surveying and mapping business and various extrusion company parts processing business. If you need, you are welcome to consult.