Mold polishing technology-The mould polishing processes,polish the mould to make the precise parts.

Mold polishing is very important for the parts injection .so First, rough throw: fine milling, EDM, grinding and other processes can choose the surface speed of 35000 ~ 40000r / min rotating surface polishing machine for polishing. Followed by hand-oil-stone grinding, strip-like lime plus kerosene as a lubricant or coolant. The order is 180 # → 240 # → 320 # → 400 # → 600 # → 800 # → 1000 #.

Second, semi-fine throw: semi-fine cast mainly use sandpaper and kerosene. The number of sandpaper is: 400 # → 600 # → 800 # → 1000 # → 1200 # → 1500 #. In fact, # 1500 sandpaper only for hardened die steel (52HRC above), and not suitable for pre-hardened steel, because it may lead to pre-hardened steel surface damage, can not achieve the desired polishing effect.mold polishing so important for the mould maker

Third, fine throw: fine cast mainly use diamond grinding paste. The grinding order is usually 9μm (1800 #) → 6μm (3000 #) → 3μm (8000 #) if the grinding is carried out with a diamond cloth or a grinding paste. 9μm diamond grinding paste and polishing cloth wheel can be used to remove the 1200 # and 1500 # sandpaper leaving the hair wear marks. (14000 #) → 1 / 2μm (60000 #) → 1 / 4μm (100000 #), followed by polishing with a clay and a diamond polishing paste.mold polishing so important for the mould maker

Fourth, the polishing of the working environment: the polishing process should be completed in two work locations, that is, coarse grinding processing sites and fine polishing processing site separately, but also pay attention to clean a process on the surface of the workpiece in the sand.That is mold polishing

Generally from the use of Whetstone to 1200 # sandpaper after the completion of rough polishing, the workpiece to be clean to clean room to ensure that no dust particles in the air stick to the mold surface. Accuracy requirements in more than 1μm (including 1μm) polishing process can be carried out in a clean polishing chamber. For more precise polishing, it must be in an absolutely clean space, because dust, smoke, dandruff and mouth foams are likely to scrapped high-precision polished surfaces.mold polishing so important for the mould maker

After the polishing process is completed, the surface of the workpiece should be protected against dust. When the polishing process is stopped, all abrasives and lubricants should be carefully removed to ensure that the surface of the workpiece is clean, and then a layer of mold rust coating should be sprayed on the surface of the workpiece.mold polishing so important for the mould maker

Also you can see more info on how to remove the mould rust

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