The Difficulties of Making Large Roto Molds

Point 1. Surface treatment

All the inside of the mold is mirror polished, which requires that the porosity should be strictly controlled below 1%, and it should be based on high-quality casting blanks.

Point 2. work blank making

In the process of sanding and CNC machining of large-sized molds, even slight deformations will cause the modules to be scrapped and need to be remanufactured.

Point 3. Welding

Each module is welded and connected, and the requirements for welding workers are very high. Mold deformation is very easy to control with small size molds, but large molds can magnify some problems.