Plastic mold polishing process, mold polishing method and working principle,
plastic mold in the production process is generally to be polished, so that the surface of the mold to meet the requirements of the product, different ways of polishing the mold also exist differences. Master the polishing technology can let the mold service life is longer, at the same time the product quality is also guaranteed. What is the process of plastic mold? What are the tools for polishing? Donglai plastic mold manufacturers small series for everyone finishing related knowledge.
Die polishing method and working principle, die polishing usually use oil stone, wool wheel, sandpaper, etc. , so that the material surface plastic deformation and remove the surface bulge to get a smooth surface, generally hand-based operation. The high quality of the surface can be used to ultra-precision polishing method, ultra-precision polishing is the use of special abrasive, abrasive polishing fluid containing, compact in the workpiece was processed on the surface, for high-speed rotation. It can be polished to the Surface roughness of Ra0.008 um.
Common tools and specifications for mould polishing, mold polishing commonly used tools are: sandpaper, whetstone, felt wheel, grinding paste, alloy file, diamond grinding needle, bamboo, fiber whetstone, rotary grinder. Sandpaper specifications include 150 # , 180 # , 320 # , 400 # , 600 # , 800 # , 1000 # , 1200 # , 1500 # ; Oilstone specifications include 120 # , 220 # , 400 # , 600 # ; felt wheels have cylindrical, round vertebral, square tip, etc. Grinding paste specifications are 1 # (White) , 3 # -Yellow-RRB-low-Orange 6 # (oraGreen, 9 # (greBlue, 15 # (blBrown 25 # (broRed , 35 # (red) , 60 # (purple) Diamond grinding needle is generally 3/32 or 1/8 handle, with circular wave shape, cylindrical shape, long straight column shape, long round vertebra shape Fiber Pebble specifications are 200 # (Black) , 400 # -Blueblue) , 600Whitehite) , 80-Red- # (red) .
(1) rough polishing, fine milling, Electrical discharge machining, grinding and other processes after the surface can choose the speed of 35,000 ~ 40,000 rpm rotary surface polishing machine polishing. Then there is the manual lapping of pebbles, in which strips of pebbles are mixed with kerosene as a lubricant or coolant. The sequence is 180 # →240 # →320 # →400 # →600 # →800 # →1000 # .
(2) semi-fine polishing, semi-fine polishing mainly uses sandpaper and kerosene. The number of sandpaper is 400 # →600 # →800 # →1000 # →1200 # →1500 # . In fact # 1500 sandpaper is only suitable for hardened die steel (above 52HRC) and not for pre-hardened steel as this may cause surface damage to the pre-hardened steel and not achieve the desired polishing effect.
(3) fine polishing, the main use of fine polishing diamond grinding paste. If the polishing cloth wheel is mixed with diamond grinding powder or grinding paste, the usual grinding sequence is 9 μm (1800 #)→6 μm (3000 #)→3 μm (8000 #) . 9μm diamond grinding paste and polishing