Cavity structure of segmented mold and machining method

The invention discloses a cavity mold of a segmented mold and a processing method, the cavity mold comprises two side plates arranged at an interval, a cavity space is formed between the two side plates, and a plurality of pattern blocks are arranged around the cavity space; a glue collecting groove is formed in the attaching face, opposite to the side plate, of the pattern block, and a glue guiding groove communicated with the cavity space is formed in the glue collecting groove. In the working process, the cavity mold is installed at a machining position in a vulcanizing machine, a tire blank rubber material is injected into the cavity space, a tire primary blank is machined and formed in the cavity space, and part of the tire blank rubber material can flow into the rubber collecting groove along the rubber guiding groove so as to form a rubber body part integrated with the tire primary blank; when a gap exists between the binding faces of the side plates and the pattern blocks, part of tire blank rubber ma