Combination device of machine barrel and screw

A machine barrel and screw combined device comprises a machine barrel and two conical screws, a conical double-through hole is axially formed in the middle of the machine barrel, each screw comprises a rod body and a screw flight, each screw flight is divided into a feeding section, a melting section and a discharging section, each rod body and each screw flight are of an integral structure formed by machining a blank with the length-diameter ratio being 1: 26, each blank is a conical body, and the length-diameter ratio of each blank is 1: 26. The two ends of the cone-shaped body are planes with circular sections, the diameter of a tail end plane circle is twice that of a top end plane circle, a cone-shaped head is arranged in the middle of the top end plane, a transmission protruding column is arranged in the middle of the tail end plane, and annular grooves are axially distributed in the outer surface of the cone-shaped body at intervals. The transmission convex column comprises a smooth column body section