The General Process Of Polishing Plastic Molds

1. Fine polishing
Fine polishing mainly uses diamond grinding paste. If a polishing cloth wheel is used to mix diamond grinding powder or grinding paste for grinding, the usual grinding sequence is 9 μ M (# 1800)~6 μ M (# 3000)~3 μ M (# 8000). nine μ M's diamond grinding paste and polishing cloth wheel can be used to remove hair like grinding marks left by # 1200 and # 1500 sandpaper. Next, polish with adhesive felt and diamond grinding paste in the order of 1 μ M (# 14000)~1/2 μ M (# 60000)~1/4 μ M (# 100000). Accuracy requirement is 1 μ Above m (including 1) μ m) The polishing process can be carried out in a clean polishing room in the mold processing workshop. If more precise polishing is performed, an absolutely clean space is necessary. Dust, smoke, dandruff, and saliva can all potentially scrap high-precision polished surfaces obtained after working for several hours.
2. Rough throwing
After milling, electrical discharge, grinding and other processes, the surface can be polished using a rotary surface polishing machine or ultrasonic grinding machine with a speed of 35000-40000 rpm. Common methods include utilizing diameter Φ Remove the white spark layer from the 3mm, WA # 400 wheel. Then there is manual oilstone grinding, with strip shaped oilstones mixed with kerosene as a lubricant or coolant. The general usage order is # 180~# 240~# 320~# 400~# 600~# 800~# 1000. Many mold manufacturers choose to start from # 400 in order to save time.
3. Semi precision polishing
Semi precision polishing mainly uses sandpaper and kerosene. The number of sandpaper in sequence is: # 400~# 600~# 800~# 1000~# 1200~# 1500. In fact, # 1500 sandpaper is only suitable for hardened mold steel (above 52HRC), and not for pre hardened steel, as this may cause surface burns on pre hardened steel parts.
4. Fine polishing
By using grinding paste for precision polishing, 8000010000 can achieve a mirror finish.