Injection Mold Manufacturers: Key Points to Note when Polishing Injection Molds
Polishing injection molds is a crucial step in the mold manufacturing process, aiming to increase the smoothness of the mold surface to achieve a shiny, beautiful, and aesthetically pleasing appearance of the final product. Moreover, it ensures that plastic products can be easily demolded, avoiding plastic adhesion to the mold surface. When polishing injection molds, there are some important considerations to keep in mind.
First, when starting to process a new mold cavity, it is essential to inspect the workpiece surface, clean it with kerosene to prevent contamination from affecting the cutting function. Additionally, during grinding, it is advisable to follow a sequence from difficult to easy, especially for challenging dead angles and deep areas that require priority treatment. For multiple workpieces polished together, start by individually treating rough or spark marks on each piece before proceeding with overall polishing until the surface is smooth.
For components with large or side flat surfaces, after removing rough marks, use a flat steel piece for light transmission testing to check for irregularities or inverted surfaces that may cause demolding difficulties or damage. To prevent inverted surfaces or protect mating surfaces, use saw blades or sandpaper for protection to ensure ideal polishing results.
When grinding mold surfaces, pay attention to the back and forth movement, keep the handle of the oilstone steady, and avoid angles exceeding 25 degrees to prevent rough marks on the workpiece surface. For flat surface polishing, copper or bamboo pieces can be used to press down on the sandpaper, ensuring the sandpaper does not exceed the tool area to avoid polishing undesired regions.
The shape of the grinding tool should closely match the mold surface shape to prevent workpiece deformation during polishing. By following these key points, the appearance of injection molds after polishing can be greatly enhanced, presenting an exceptionally attractive exterior. Injection mold polishing is not just a simple process but a vital guarantee for product quality and appearance.