Injection molding machine screw renovation and polishing need to pay attention to three points
1. In order to avoid scratches and burns on the surface of the workpiece, special care must be taken when polishing with #1200 and #1500 sandpaper. It is therefore necessary to load a light load and polish the surface with a two-step polishing method. When polishing with each type of sandpaper, it should be polished twice in two different directions, with each rotation between 45° and 90°.
2. When changing to different types of sandpaper, the polishing direction should be changed from 45° to 90°, so that the stripe shadow left by the polishing of the former type of sandpaper can be distinguished. Before changing different types of sandpaper, the polished surface must be carefully wiped with 100% pure cotton and a cleaning solution such as alcohol, because a small gravel left on the outside will destroy the entire polishing work. This cleaning process is equally important when polishing from sandpaper to diamond polishing. All granules and kerosene must be completely cleaned before polishing continues.
3. Use a soft stick or bamboo stick to polish with sandpaper. When polishing a round or spherical surface, use a soft rod to better cooperate with the curvature of the round and spherical surfaces. Harder wood strips like cherry wood are more suitable for smoothing the appearance of the exterior. The end of the trimmed strip allows it to conform to the shape of the steel piece, thus avoiding the sharp angle of the strip (or bamboo strip) touching the exterior of the steel to form a deeper scratch.