The invention relates to the technical field of liquid
medicine coating equipment, in particular to a
coating machine which comprises a frame, and a liquid
medicine tank, a driving shaft, a water passing shaft, a
transfer printing roller, a damping rod and a floating block are arranged on the frame. The driving shaft, the water passing shaft and the
transfer printing roller are all rotationally connected with the frame, the driving shaft is connected with the water passing shaft and the
transfer printing roller through a transmission
assembly, the surface of the water passing shaft makes contact with the surface of the driving shaft and the surface of the transfer printing roller, and the water passing shaft makes contact with liquid
medicine in the liquid medicine tank. The damping rod is connected with a floating block, and a rotary supporting roller is arranged on the floating block; wire grooves are formed in the surfaces of the driving shaft, the water passing shaft and the rotary supporting roller. A water
absorption layer is arranged on the surface of the transfer printing roller. According to the
coating machine provided by the invention, the defect of non-uniform coating of liquid medicine is overcome, the production efficiency is improved while the quality is guaranteed, the waste of the liquid medicine is reduced, and the coating
machine is energy-saving and environment-friendly.