Novel solid carbon dioxide forming device

The utility model discloses a novel solid carbon dioxide forming device which comprises a main oil cylinder. And the main oil cylinder is connected with the right end of the connecting transition box body through a bolt. Positioning installation of the main oil cylinder and the extrusion cavity is achieved by connecting the spigots on the two sides of the transition box body, the structure of the connecting flange is greatly simplified, the manufacturing cost of the main oil cylinder is reduced, meanwhile, the coaxiality of the extrusion piston and the extrusion cavity is efficiently guaranteed, and compared with a traditional mode that a sleeve is adopted for connecting the main oil cylinder and the extrusion cavity, the machining efficiency is improved. The extrusion piston does not need to be additionally provided with a sealing device to prevent low-temperature snowflake-shaped solid carbon dioxide from entering the oil cylinder guide sleeve side to damage oil cylinder sealing, and the snowflake-shaped so