The invention relates to a rotary mechanical vacuum bottle and its material preparation method, designed to solve the technical problems of residual liquid accumulation, uncontrollable liquid output and difficulty in manufacturing ultraviolet-resistant and pressure-resistant components in existing products. The outer bottle of the vacuum bottle is provided with a bottom cover at the bottom, an inner plug is arranged inside the outer bottle at the bottom cover end, and a press cover is fixedly sealed and buckled at the inner bottle mouth of the outer bottle. A screw hole is formed in the center of the bottom cover, which is rotatably fixed to the bottom of the outer bottle. Thread ribs at one end of the screw rod are connected to the screw hole through a through hole in the center of the inner plug. A channel hole is arranged along the central axis of the screw rod, and the other end of the screw rod abuts against the bottom of the piston inside the outer bottle. A plug is fixedly buckled in the central hole of the press cover, the outer diameter of the inner plug is in contact with the inner wall of the outer bottle, and a liquid outlet gap is reserved between the press cover at the bottle mouth and the plug. The piston is driven to rise by the screw rod until the step ring mouth of the inner plug is limited by the outer diameter step ribs of the outer bottle.

Area Code: CN

Application Number: CN201910773265.8