Large machine tool castings are mainly used for the flat plate manufacturing of machine tools, and the casting process is simply accepted. In order to make full use of the pressure action of liquid metal under the pressure of low pressure casting, it should be used in the process design.
The coating technology requirements for large machine tool castings are:
1, after machine processing, the bed casting must be washed or washed with metal cleaner or clean industrial gasoline before painting, so as to ensure that the oil and other dirt on the surface can be completely removed.
2, bottom paint brush or spray, dip to uniform, primer must be fully mixing before use, and then diluted to appropriate annual smear.
3. the large machine tool castings should be checked before the coating is painted, and the surface should be cleaned with tools, and the surface dirt should be cleared.
4, the mill grinding technology, in order to prevent the machine tool castings processed by surface rust, antirust water grinding.
5. The putty filled with the castings should be added to a proper amount of curing agent according to the use of the product. It must be fully stirred and uniform before use.
6, after the last machine to clean up the large machine tool castings, we need to spray vinyl chloride and second primers, so that we can improve the smoothness of the paint film and improve the gloss of the paint film.
