Bottom die for forming suspension type porcelain insulator

The utility model discloses a bottom die for forming a suspension type porcelain insulator, which relates to the technical field of insulator production and processing and comprises an outer die and an inner die which are connected through a screw, a forming cavity is arranged on the top surface of the inner die, an air cavity is formed between the outer die and the inner die, and an air inlet channel is arranged at the bottom of the outer die and communicated with the air cavity. A head breathable block and an umbrella breathable block are embedded in the bottom of the inner mold and the umbrella portion respectively, the outer mold and the inner mold are both made of cast aluminum materials, the head breathable block and the umbrella breathable block are both made of microporous ceramic materials, an air valve is arranged at the air inlet end of the air inlet channel, an extending portion is fixedly arranged at the bottom of the outer mold, and the air valve is located in the extending portion. According to