Label printing device capable of automatically tensioning and contracting

Abstract

The invention discloses a label printing device capable of automatically tensioning and contracting, which comprises a printing table, guide rollers and a printing cylinder. The two main side walls ofthe printing table are provided with guide roller bracket plates. A plurality of guide rollers for threading a label paper tape are rotatably fixed to the guide roller bracket plates. A printing caseis fixed directly above the printing table by a lifting mechanism. The guide roller bracket plates are installed on the left and right side walls of the printing table by a stretching mechanism. Theguide roller bracket plates are provided with opposite guide rollers in pairs on front panels. Cam rotation mechanisms for adjusting the distance between the guide rollers are arranged between the guide rollers. A lifting roller for lifting the label paper is disposed on the center of the top surface of the printing table through a lifting mechanism. The the cylinder walls of the guide rollers andthe lifting roller are provided with pressure sensors that fit the arc of the cylinder walls. The label printing device uses the pressure sensors to tension and contract the two sides and the middleof the label paper tape, is efficient and convenient in adjustment, and can achieve adjustment quickly without shutdown.

Description

technical field [0001] The invention specifically relates to a printing device, in particular to a label printing device with automatic tension and contraction. Background technique [0002] Printing equipment refers to the machinery that prints and reproduces text images with printed plates. According to the different printing plates used, it is divided into letterpress printing machines, lithographic printing machines, gravure printing machines, stencil printing machines, special printing machines, etc. According to the embossing form, there are three basic types of flat presses, circular presses and circular presses. [0003] Label printing equipment generally has high requirements on the positioning accuracy of the label paper tape, which needs to ensure that the label paper tape maintains a moderately tight state during the printing and conveying process. Sliding or misalignment of the label paper will easily lead to misalignment of large-scale label paper printing. T...

AI Technical Summary

Problems solved by technology

[0003] Label printing equipment generally has high requirements on the positioning accuracy of the label paper tape, which needs to ensure that the label paper tape maintains a moderately tight state during the printing and conveying process. Sliding or misalignment of the label paper will easily lead to misalignment of large-scale label paper printing. Therefore, a well-controlled and effective tensioning and shrinking device is crucial to the printing process of label paper. Currently, the tensioning and shrinking devices on the market are generally installed on both sides of the printing equipment's conveying paper belt. The stretching on both sides of the paper tape realizes the tight positioning of the paper tape, but generally the tensile strength is adjusted manually before production. When the printing machine is working, it is impossible to correct the loosening of the paper tape that may occur on site in real time. Real-time monitoring and adjustment, so for this kind of problem, we need a multi-point rotatable printing equipment for tensioning shrink label tape

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