Contour forging printing plate roller

Abstract

The invention aims to provide a holographic embossing printing roller, wherein, the working surface has an unequal temperature. The printing roller is utilized to conduct twice mould pressing to raw material film, so as to eliminate the quality problem of a finished film caused by print seam to a largest extent. A left chock plug and a right chock plug are respectively and fixedly connected to two ends of the pipe wall of the printing roller; an oil guide port formed on the right chock plug can be connected with an oil pipe connector; at least a longitudinal oil passage is formed on the pipe wall of the printing roller; a cooling oil port is formed on the left chock plug; at least an oil passage arranged inside the left chock plug makes the longitudinal oil passage arranged on the pipe wall of the printing roller to connected with the cooling oil port; the cooling oil port can be connected with the oil pipe connector; and the longitudinal oil passage arranged on the pipe wall of the printing roller and the oil passage inside the left chock plug together form a cooling oil passage. The invention has the beneficial effects that the pattern levels on a painting and press film after being subject to mould pressing by the printing roller are in natural transition; and the patterns after twice mould pressing are complementarily superimposed, so that the finished film has even levels and natural colors visually.

Description

technical field [0001] The invention relates to the field of molded plate rollers for holographic embossing machines, and more specifically relates to a non-isothermal molded plate roll. technical background [0002] The application of holographic image technology on PET plastic coating film was first introduced from the United States to China at the end of the last century. The principle is as follows: the holographic image is imaged on the photolithographic glass coating plate by photography or photolithography, and then the holographic image on it is copied to the metal nickel plate by electroforming, and then the thickness is about 15~80μm The metal nickel plate with holographic image is used as a working plate and attached to the plate roll of the holographic image imprinting machine. The PET coating film passes on the plate roll at a temperature of 140°C to 200°C, while the side roll is directed towards the plate roll. The PET coating film is pressurized, and the holo...

AI Technical Summary

Problems solved by technology

[0004] However, because the metal nickel plate will inevitably produce interface gaps when the surface of the plate roll is bonded, the finished film molded on the ordinary plate roll will have a gap due to the plate gap The temperature at the place is low, and there are more obvious black gaps or black lines, which affect the application of the finished film

[0005] In order to eliminate the black seam, black line or obvious color difference on the finished film, the Chinese utility model patent "seamless holographic molding device" (patent number: 200520064521. "Seamless molding plate (roller)" method, in which the planar nickel plate printed with holographic images is rolled into a cylindrical shape with the pattern facing inward, and it is used as an electroforming mold to directly electroform a holographic image printed However, this method makes the production process of the plate very complicated, and the pass rate and quality of the produced plate are actually relatively low. Through the analysis of this method, it can be known that the plate produced by this method The roller is not a true seamless embossed plate roller; the Chinese invention patent application "Laser Holographic Embossed Plate Pulling Method" (patent application number: 200510019746.8) discloses a method for laminating a holographic nickel plate on a plate The method on the roll: Wrap the holographic nickel plate around the plate roll, put the excess length of the nickel plate into a special narrow slot of the plate roll, and use a wedge to tighten the nickel plate so that it fits on the plate roll. This method has a certain prompting effect on reducing the width of black seams or black lines, but it still cannot completely eliminate defects; A molding machine for producing seamless holographic film and mentioned the principle of the machine: the raw material film will be molded twice before and after, and a special device is used to detect the position of the gap between the front and rear rollers. Automatically adopt the method of skipping and not embossing, by adjusting the distance between the front and rear two embossing stations, so that the two gaps and non-imprinting areas fall on the areas that have been embossed or will be embossed, thereby reducing the printing pressure. The adverse effect of seams on the finished film, the machine does not carry out technical transformation on the existing plate roll, but simply eliminates defects through process control, but, because the production process is continuous, the "intermittent mechanism" described in the machine will In the state of repeated action, the action frequency of the "intermittent mechanism" will become higher during high-speed production, and it will face the problem of repeated positioning accuracy of the pressure roller. Repeated positioning of the pressure roller will cause changes in the pressure intensity, resulting in changes in the pattern level of the finished film. At the same time, the method of using the method of skipping the seam without embossing belongs to the color step printing process, and the transition of the pattern level will be affected to a certain extent. These factors will affect the quality of the finished film.

At present, there is no perfect roll design that can solve the problems of uneven film layers, unstable quality, and low production efficiency caused by the plate seam.

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