the mold surface roughness is a very important technical parameter in mold making, because the surface finish of the molding area directly affects the surface roughness of the plastic part. A range of polishing tools is used to meet a different surface finish requirement. The society of plastics industry classifies mold surface finishes into 12 grades in 4 categories:
A—mirror image, it is typically polished with diamond paste, it’s surface finish Ra is 0—0.0001mm, applicable for plastic parts whose surface should have high luster. In general, mirror image is further classified into A1, A2, and A3.
B—smooth, it is usually polished with sand paper. It’s surface finish is between 0.0001—0.0002mm, applicable for plastic parts with a typical surface requirement. This category can be further classified into B1, B2, and B3.
C—Semi-smooth.it is polished with whetstone. It’s surface finish is between 0.0002—0.0008mm, applicable for plastic parts without a specific surface finish requirement. This category is also further classified into C1, C2, and C3.
D—General. Sand blasting is commonly used. This category is also further classified into D1, D2, and D3.
As a mold surface polishing technician, I agree with you.
sometimes It is not easy to accurately judge the surface roughness of the mold.
actually every mold engineer must know the mold surface roughness is very important
every mold engineer certainly knows the importanty of the mold surface roughness
i agree you blog can learn a lot of professional knowledge, i would recommend to my friends
yes! it is very important, but sometimes it is not easy to accurately judge
every mold maker understands it’s importance
your blog is very professional, I like to read.
Now CNC machining have been able to achieve high surface roughness
In our mold workshop, I often hear mold workers and engineers talking about it