Unfolding mechanism for printing medium of thermal printing machine and unfolding method thereof

Abstract

The invention relates to an unfolding mechanism for a printing medium of a thermal printing machine and an unfolding method thereof, the unfolding mechanism comprises a frame, a printing head movably connected with the frame and a driving supporting shaft, a color bar driving tension shaft, a color bar driven tension shaft, a printing carrier driving tension shaft and a printing carrier driven tension shaft are movably connected on the frame, the color bar driving tension shaft is connected with a color bar motor output shaft, the printing carrier driving tension shaft is connected with a carrier motor output shaft, a color bar damper is arranged on the color bar driven tension shaft, a carrier damper is arranged on the printing carrier driven tension shaft, the color bar driven tension shaft and the printing carrier driven tension shaft are respectively provided with a damper, the dampers can give resistance opposite to the printing direction to the color bar driven tension shaft andthe printing carrier driven tension shaft, the color bar driving tension shaft and the printing carrier driving tension shaft can provide tensioning force in the same direction with the printing direction for a color bar and a printing carrier, and the resistance and the tensioning force are balanced, thereby ensuring that the color bar and the printing carrier are always in the unfolding state.

Description

Technical field: [0001] The invention belongs to the technical field of thermal printers, and in particular relates to a flattening mechanism and a flattening method for printing media of thermal printers. Background technique: [0002] Banners are a unique form of advertising in China. Traditional banner production is mainly based on screen printing and inkjet printing. These two production methods pollute the environment, have low efficiency, and are time-consuming and labor-intensive. [0003] With the development of science and technology, technicians have developed thermal banner printers suitable for printing banners. Thermal banner printers are a brand-new banner production equipment with more environmental protection, high efficiency, computer typesetting, single-person operation, and time-saving. It converts the data received by the printer into a dot matrix signal to control the heating of the thermal unit, heats and develops the thermal coating on the thermal pa...

AI Technical Summary

Problems solved by technology

Although this method solves the problem of keeping the printing medium flat, it uses two torque motors, which has high cost and high energy consumption. The resistance on the moving shaft will change due to the gradual transfer of the printing medium to the driving shaft, which will make it difficult to change the resistance in real time with the printing time, and eventually cause inconsistent tension on the printing medium, which will further affect the printing medium wrinkle to print quality

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