Printing machine introducing and preprocessing device for easy-to-stretch coiling block material

Abstract

The invention discloses an inletting and pretreatment device used for a tensile spool material printing press, which comprises a tension detection and control mechanism and a pretreatment mechanism. The tension detection and control mechanism comprises a super low friction air cylinder (1), a tension detection floating roll (4), a zero tension control counterweight shaft (6), a high precision rotating potentiometer and a vector frequency conversion motor (19) and so on. The pretreatment mechanism comprises a press roll (12), a cooling pull roll (8), a preheat roll (7) and so on. Cooling medium is fed in the cooling pull roll (8); and heating agent is fed in the preheat roll (7). The invention completes the inletting of spool material with higher tension control precision, and facilitates control of low tension and even zero tension with higher tension control precision. The invention is not only applicable for pretreatment and inletting during printing of tensile materials, such as thin-film material, paper and so on, without affecting the inletting of common spool materials at all.

Description

technical field [0001] The invention relates to a printing machine introduction and pretreatment device, in particular to a printing machine introduction and pretreatment device for easy-stretch roll materials. Background technique [0002] In the printing of all roll materials, after the roll-shaped raw materials such as paper tapes and plastic films are unrolled, they must be tensioned and flattened by the introduction mechanism of the material under the stretching effect of external force, and then evenly and flattened. The printing material is sent to the printing position for printing, and after the printing is completed, the printing material is re-rolled into a roll through the printing material lead-out mechanism and the winding mechanism. [0003] For printing machines with ordinary roll materials (such as polypropylene BOPP film, paper, etc.), due to the good physical properties of the material itself, the introduction mechanism only needs to ensure the general ten...

AI Technical Summary

Problems solved by technology

Although this kind of device has higher precision than the magnetic powder control, due to the limitations of the design of the mechanical actuator and the tension detection mechanism, and the pretreatment of the physical properties of the material and the tension control are performed separately, the pretreatment process affects the tension control accuracy and lowers the sensitivity. Or plastic deformation occurs again under the action of the tension adjustment mechanism after pretreatment, which affects the pretreatment effect and cannot meet the requirements of high-precision printing; at the same time, a separate oven is used in the coil pretreatment process, and only hot air is used to The material is preheated, which makes the original pretreatment process with many problems, and increases the problem of insufficient flatness of the material.

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