Multicolor printing machine

A technology of printing presses and printing units, applied in the directions of printing, printing devices, etc., can solve the problems of inaccurate overprinting and inability to ensure stable substrate tension.
CN101863170AInactive Publication Date: 2010-10-20曹杨
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
曹杨
Publication Date
2010-10-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a multicolor printing machine. In the invention, vacuum adsorption rolls of printing stocks are at least arranged in front of a first printing unit and behind a last printing unit, a plurality of axially arranged air intake ducts are arranged below the roll surfaces of the vacuum adsorption rolls, a plurality of suction holes which are communicated with the air intake ducts arranged below the roll surfaces are distributed on the roll surfaces, an exhaust hood communicated with a vacuum aspiration machine and used for butting the air intake duct outlets which rotate by a sector part of a wrap angle of the printing stock is arranged on the end surface of the vacuum adsorption rolls, exactly opposite to the sector part, and drive wheels arranged on shafts of the vacuum adsorption rolls are connected with each other through a synchronous belt. Compared with the prior art, the printing machine can solve the problem that the tension applied to the printing stock at the printing phase is acted by variation of printing parameters, and the printing stock stretches, thereby causing misregister.
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Description

technical field

[0001] The invention relates to the technical field of printing machinery, in particular to a printing machine with a plurality of printing units and a material in the form of a roll as the printing raw material. Background technique

[0002] A printing machine with multiple printing units requires precise alignment between the substrate and the printing plate roller during color separation overprinting to achieve the printing effect required by the design. If there are many such color separation overprinting units, multiple printing units The final overprinting has very high requirements on the accurate positioning of the substrate. When the roll-type printing material enters the printing process of the printing machine, the printing material has to undergo multi-stage tension control such as unwinding traction, rewinding traction, and winding. The tension of each section will change, and this tension change will directly cause the substrate. The change of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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