Plastic mold polishing general process

Plastic mold polishing general process

1, fine polishing

Fine polishing mainly diamond polishing paste. When polishing with a diamond cloth or a polishing paste using a polishing cloth, the usual polishing order is 9 μm (# 1800) to 6 μm (# 3000) to 3 μm (# 8000). 9μm diamond abrasive and polishing cloth wheels can be used to remove the hairline marks left by # 1200 and # 1500 sandpaper. Followed by polishing with a viscose felt and a diamond polishing paste in the order of 1 μm (# 14000) ~1 / 2 μm (# 60000) ~1 / 4 μm (# 100000). Polishing processes requiring accuracy above 1μm (including 1μm) can be performed in a clean polishing chamber in a mold shop. For more sophisticated polishing you will need an absolutely clean space. Dust, fumes, dandruff and saliva all have the potential to scrap the highly polished surfaces obtained after hours of work.

2, rough throwing

After the milling, EDM, grinding process surface can choose the speed of 35 000-40 000 rpm rotary surface polishing machine or ultrasonic polishing machine for polishing. A commonly used method is to use a wheel of diameter Φ3mm, WA # 400 to remove the white EDM layer. Then manual whetstone grinding, bar stone plus kerosene as a lubricant or coolant. The general order of use is # 180 ~ # 240 ~ # 320 ~ # 400 ~ # 600 ~ # 800 ~ # 1000. Many mold makers choose to save time and start at # 400.

3, semi-fine polishing

Semi-fine polishing mainly use sandpaper and kerosene. The numbers of sandpaper are as follows: # 400 ~ # 600 ~ # 800 ~ # 1000 ~ # 1200 ~ # 1500. In fact # 1500 sandpaper is only suitable for hardened die steel (above 52HRC), but not for pre-hardened steel, as this may cause pre-hardened steel surface burns.

⒋ fine throw

Fine polishing with abrasive paste, 8000,10000 to reach the mirror.