The reasons for a high-gloss finish in plastic molding vary. Some examples include extreme transparency of the molded part, reduced localized corrosion or highly crack-sensitive tooling (due to design or operational stresses). Then there is the impact of mold surface finish on injection molding productivity, as the release forces of the plastic part from the [...]
Polishing is simple. It’s more about how you apply it, standard process involves using general-purpose, middle-of-the-road hardness stones. Depending on surface roughness, he typically begins with a 400-grit stone, then a 600-grit, a 900-grit and sometimes a 1200-grit for the required finish. […]
Ultrasonic units with super fast, very short strokes, provide virtual unrestricted finger tip control. By comparison, regular reciprocating tools—such as air-driven or electric flexible shaft-operated die profilers—are more restrictive in movement and less flexible to handle. Nevertheless, die profilers and/or various other filing machines are great for medium to large mold details and when used [...]
We need to stay objective and remind ourselves that ultrasonic polishing is not for everyone. Frequently, ultrasonic systems are perceived to take care of all polishing problems. This is not so. Ultrasonic polishing is not a cure-all for every mold and die shop that does in-house polishing. […]
1) Cleanliness. Keep your polishing area away from grinding dust and chips. Do not allow it to become a disorganized mess of loose stones and accessories. […]