What are the polishing methods of plastic mold?
(1)Speeding mechanical polishing
Mechanical cutting, polishing is to rely on material surface plastic deformation after removed by polishing the convex part of the smooth surface polishing method, commonly used article oil stone, wool wheel, abrasive paper, etc., with manual operation is given priority to, special components such as surface of solid of revolution, can use tools such as turntable, high surface quality can be used over lapping method.Super precision polishing is a special grinding tool used in the grinding fluid containing abrasive
Turn movement.The surface roughness of Ra0.008 can be achieved by using this technology, which is the highest among all polishing methods.This method is often used in optical lens molds.
(2) chemical polishing
Chemical polishing is the concave part of a material that makes the surface of a material appear on a microscopic surface in a chemical medium
The preferred solution is to get a smooth surface.The main advantage of this method is that it does not require complicated equipment. It can polish the workpiece with complex shape, and it can polish many workpieces at the same time with high efficiency.The core problem of chemical polishing is the preparation of polishing fluid.The surface roughness obtained by chemical polishing is generally tens of microns.
(3) electrolytic polishing
The basic principle of electrolytic polishing is the same as chemical polishing, that is, the surface is smooth by selectively dissolving the small protruding part of the material surface.Compared with chemical polishing, the effect of cathode reaction can be eliminated.The electrochemical polishing process is divided into two stages.
The macroscopic leveling solution diffuses into the electrolyte, and the surface roughness decreases, Ra > lum.
Potassium microscopic flat anode polarization, surface roughness increased, Ra < lum.
(4) ultrasonic polishing
The workpiece is put into the abrasive suspension and placed together in the ultrasonic field. The workpiece can be ground and polished on the workpiece surface with the help of ultrasonic oscillation.Ultrasonic machining macroscopic force is small, will not cause the workpiece deformation, but the tooling production and installation are difficult.Ultrasonic processing can be combined with chemical or electrochemical methods.On the basis of solution corrosion and electrolysis, ultrasonic vibration stirring solution is applied to separate the dissolved products on the workpiece surface, and the corrosion or electrolyte near the surface is even.Ultrasonic cavitation in liquid can also inhibit the corrosion process.
(5) fluid polishing
Fluid polishing relies on high speed fluid flow and the abrasive particles it carries to scour the surface of the workpiece to achieve the purpose of polishing.Commonly used methods are abrasive injection processing, liquid injection processing, hydrodynamic grinding and so on.Hydrodynamic grinding is driven by hydraulic force, so that the liquid medium carrying the abrasive particles reciprocates through the workpiece surface at high speed.The medium is mainly made of special compounds (polymer-like substances) with good mobility under low pressure and is mixed with abrasive, which can be made of silicon carbide powder.