Aluminum moulds by the press casting

Question

We create aluminum moulds by the press casting can you propose anything so that the moulds must shine after casting?

Answer 1

Shininess of castings is only depends on the surface quality of the cast parts. Casting surface finish is always the function of mold surface and features. The selection of the mold materials and accuracy of mold finish maintained in the premium casting operations make sure that specified requirements are met. Sometimes there is possibility of raising surface finish of castings by raising their surface tension. This is done for the aluminum alloys through allowing the formation of oxide inclusions, the most significant of which is Al2O3, in the molten metal. The raise in surface tension prevents molten metal from penetrating in the mold depressions because as you know surface finish enhances if the melt solidifies in contact with air. But, such the resolution is accompanied through reduce in mechanical properties of castings, since oxides will act as stress concentration sites.