The mold casting of is as follows:
1. Eccentric hemispherical valve investment casting (wax casting)
First, wax is used to make a casting with the same appearance as the casting. Coating and quartz sand are applied externally. After immersion in the hardening fluid and hardening, the wax is melted out to get the empty shell. After drying, moisture is removed. After pouring the metal liquid into the empty shell and cooling and solidification, the shell is broken and the casting is taken out.
2. Eccentric hemispherical valve EPC (negative pressure casting)
First, use plastic foam to make a pattern the same as the casting, and then dry it in the drying room. After drying, bury it in the dry sand, cover the surface of the dry sand with a film, vacuum treat it with air extraction, and then pour in the metal melt solution, which melts the foam into the cavity, and pour it out from the special sand box after the casting has cooled and solidified.
