Mirror polish injection molds
What is mirror polishing?
To obtain a high-quality polishing effect. The most important thing is to have high-quality stone, sandpaper, diamond abrasive paste polishing tools. And aids. The polishing procedures selected depend on the surface condition after the pre-processing. Such as machining, EDM, grinding, and so on. The mechanical polishing process is generally as follows:
① surface after the rough polishing process by milling
EDM, grinding, etc. You can choose the speed at 35 000-40 000 rpm rotating surface polishing machine or ultrasonic grinding machine for polishing. Commonly used methods using diameter Φ3mm, WA # 400 wheel removing layers of white sparks. Then hand Whetstone grinding, strip Whetstone plus kerosene as a lubricant or coolant. The general order of use is # 180 to # 240 to # 320 ~ # 400 ~ # 600 ~ # 800 to # 1000. Whetstone polishing method. Which is the most important job a difficult job processed according to different specifications? And an angle of approximately 70 degrees a balanced cross lapping position? Ideally from a range of about 40 mm to 70 mm. Whetstone jobs will vary according to the material processed. Many mold manufacturers in order to save time and choose from # 400 to start.
② semi-fine polishing semi-fine polishing mainly used sandpaper and kerosene.
After Whetstone’s job is job sandpaper, sandpaper when the job. Pays attention to die Jen rounded edges, rounded corners, and orange peel generation. So try to make the finest Whetstone flow processing. Sandpaper polishing focus. Sandpaper with a hard stick like a stone like a job for about 70-degree angle to cross grinding. Polishing sandpaper side number about 10 times to 15 times. If the grinding time is too long, grinding force sandpaper will reduce. Which would lead to the machined surface uneven phenomenon? Which is also produced one of the reasons orange peel?
When jobs are generally used bamboo sandpaper grinding. Low stretch material actually used a small stick or rod hardness of about 45-degree angle grinding is the most ideal. The polished surface cannot be used as a rubber or a material with high elasticity. And cannot be polished with a 45-degree angle may be an acute angle shape. Numeral sandpaper as follows: # 220 ~ # 320 ~ # 400 ~ # 600 ~ # 800 ~ # 1000 to # 1200 to # 1500. Actually, # 1500 sandpaper only suitable for hardened tool steel (52HRC above) does not apply to pre-hardened steel. As this may lead to pre-hardened steel surface burns.
③ fine polishing diamond polishing paste mainly used.
If the powder or mixture of diamond abrasive grinding wheel pastes for polishing a polishing cloth. Then the order of the normal polishing 9μm (# 1800) ~ 6μm (# 3000) ~ 3μm (# 8000). 9μm diamond polishing paste and polishing cloth wheel can be used to remove the # 1200 and # 1500, leaving hair like sandpaper grinding marks. Then with sticky carpets and diamond polishing paste for polishing. The order of 1μm (# 14000) ~ 1 / 2μm (# 60000) ~ 1 / 4μm (# 100000).
Accuracy requirements in 1μm above (including 1μm) polishing process in the mold processing workshop in a clean polished interior can be carried out. If a more precise polishing an absolute necessity to clean the space. Dust, smoke, dandruff. And saliva Mo is likely to be scrapped after a few hours of work to get a high-precision polishing surface.
Cn-moulding is a reusable china injection mold company. We focus on high glossy mold manufacturing. One strong point of us is polished mold mirror and glossy, with short cycle time and competitive price.