Large-scale rotary press

Abstract

The invention discloses a large-scale rotary press. The large-scale rotary press is characterized by comprising an ink feeding device, a plate cylinder, a transfer cylinder, an impression cylinder, channels, grabbing devices, a paper feeding roller, a chain wheel and a main driving wheel, wherein a roller of the ink feeding device is configured to the plate cylinder, the plate cylinder is meshed with the transfer cylinder in an external tangency mode, the transfer cylinder is meshed with the impression cylinder in an external tangency mode, the impression cylinder is meshed with the paper feeding roller in an external tangency mode, the paper feeding roller is in transmission connection with the main driving wheel through the chain wheel, the two channels for installing the grabbing devices are arranged on the impression cylinder, and the grabbing devices sink into the corresponding channels. The large-scale rotary press has the advantages that structure is simple, design is reasonable, transmission efficiency is high, no hard impact can be generated among parts, the service life of the parts is long, noise is low, and the transfer effect is good.

Description

technical field [0001] The invention relates to the technical field of rotary printing, and in particular provides a large rotary printing machine. Background technique [0002] When transferring sheets in existing rotary printing presses, the sheets are passed by a cylinder to a chain gripper system, in which the sheets are fed by grippers on the leading edge and on the trailing edge Edge holding, rear edge grippers receive sheets in the outlet wedge between the support surface that travels with the sprocket and the cylindrical shell surface, the sheets are sucked by the suction grippers until they are picked up by the rear edge grippers Keep, these suction grippers also go around with the sprocket, in order to be able to guide the rear edge grippers past the shell surface of the drum without impact, corresponding recesses are provided in the shell surface, which Additional manufacturing costs are involved, and the high torques lead to wear of the drive belt elements, ther...

AI Technical Summary

Problems solved by technology

[0002] When transferring sheets in existing rotary printing presses, the sheets are passed by a cylinder to a chain gripper system, in which the sheets are fed by grippers on the leading edge and on the trailing edge Edge holding, rear edge grippers receive sheets in the outlet wedge between the support surface that travels with the sprocket and the cylindrical shell surface, the sheets are sucked by the suction grippers until they are picked up by the rear edge grippers Keep, these suction grippers also go around with the sprocket, in order to be able to guide the rear edge grippers past the shell surface of the drum without impact, corresponding recesses are provided in the shell surface, which Represents additional manufacturing costs, and the high torque causes wear of the drive belt elements, thereby reducing the life of the drive and the strength of the components

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