plastic mould, injection mould

Plastic mold polishing process

Plastic mold polishing the basic procedures in order to obtain high-quality polishing, the most important thing is to have a
Plastic mold
Quality of Whetstone, sandpaper and diamond grinding tools and polishing ointment aids. The polishing process depends on the choice of pre-processed surface conditions, such as machining, EDM, grinding, and so on.
Plastic mold polishing the general process is as follows:
1, fine polishing
Fine polishing using diamond polishing paste key. If the polishing cloth with a mixture of diamond abrasive wheel abrasive powder or paste for grinding, then grind the usual order of 9μm (# 1800) ~ 6μm (# 3000) ~ 3μm (# 8000). 9μm diamond polishing paste and polishing cloth wheel is used to remove the # 1200 and # 1500 sandpaper grinding marks left by the hairy. Then use the sticky carpet and polishing the diamond abrasive paste, in order of 1μm (# 14000) ~ 1/2μm (# 60000) ~ 1/4μm (# 100000). Accuracy in more than 1μm (including 1μm) of the polishing process in the mold shop in a clean room can be polished. If a more sophisticated finish is absolutely necessary for a clean space. Dust, smoke, dandruff and saliva foam are likely to scrap a few hours after work to get the high-precision polishing surface.
2, rough polishing
After milling, EDM, surface grinding and other processes can be selected after the 35 000-40 000 rpm speed rotation of the surface grinding machine polishing machine or ultrasonic polishing. Commonly used methods are the use of diameter Φ3mm, WA # 400 of the spark wheel to remove the white layer. And then grinding by hand Whetstone, Whetstone strip plus kerosene as coolant or lubricant. The use of general order # 180 ~ # 240 ~ # 320 ~ # 400 ~ # 600 ~ # 800 ~ # 1000. Many mold makers in order to save time and the choice of starting from # 400.
3, semi-fine polishing
Semi-fine sandpaper and polishing the main use of kerosene. Sandpaper numbers were: # 400 ~ # 600 ~ # 800 ~ # 1000 ~ # 1200 ~ # 1500. # 1500 sandpaper actually only suitable for hardened tool steel (52HRC above) does not apply to pre-hardened steel, as this may result in pre-hardened steel surface burns.

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