Punch press castings

　　Cast iron platformMainly used as raw materials for machine components, some precision castings can also be directly used as machine components. Castings account for a large proportion in mechanical products, such as tractors, where the weight of castings accounts for about 50-70% of the total weight of the machine, agricultural machinery accounts for 40-70%, and machine tools, internal combustion engines, etc. account for 70-90%. Among various types of castings, there are many varieties of mechanical castings with complex shapes,Testing PlatformThe usage is also large, accounting for about 60% of the total production of castings. Next are steel ingot molds used in metallurgy and pipelines used in engineering.

　　Customized cast iron partsThe non machined surface and appearance quality have a significant impact on the marketability of castings, including:

(1) Surface roughness (swelling, shrinkage, and sand inclusion);

(2) Surface or internal cavity cleanliness (sticky sand, sticky "coating layer");

(3) Flatness deviation (unevenness of non machined surfaces);

(4) Surface roughness;

(5) Contour clarity (the contour clarity of structural units such as protrusions and umbilices, evaluated with the naked eye).Cast iron platformRequirements for disappearing molds: Coating (1): Coating requirements: Use water-based graphite coating with a wave density between 60-70, and apply it in a greenhouse. It is strictly prohibited to move it before drying to prevent deformation. (2) Brushing requirements: Mix the coating evenly and strictly expose the white during brushing (3) Coating drying: After the coating is dried, it should have sufficient strength and be dried at 50-60 ℃ for 24 hours

　　cast iron surface plate