TWI761603B - Manufacturing method of seamless sleeve for gravure printing - Google Patents

Abstract

In order to provide a seamless sleeve for gravure printing, which can perform continuous printing without a seam, can perform plate change in a short time, and is easy to process.

The seamless sleeve for gravure printing includes: a seamless sleeve body composed of a platable cylindrical metal base material and having grooves formed on the surface, and a sleeve body for covering the surface of the sleeve body. Surface strengthening coating. The platable cylindrical metal substrate is preferably copper. The aforementioned surface strengthening coating layer is preferably a DLC coating layer, a silicon dioxide coating layer or a chrome plating coating layer.

Description

Manufacturing method of seamless sleeve for gravure printing

The present invention relates to a seamless sleeve for forming a gravure plate-making roll by being sleeved on a printing base cylinder, and more particularly, to a seamless sleeve for gravure printing without a seam for gravure printing.

In gravure printing, tiny recesses (gravure cells) corresponding to the plate-making information are formed on a gravure plate-making roller (gravure cylinder) to make a layout, and the grooves are filled with ink and transferred to the printed matter. A general gravure plate-making roll is prepared by preparing a heavy metal hollow roll formed of a metal such as aluminum or iron as a plate base material, and copper plating for plate formation is formed on the surface of the metal hollow roll by copper plating. Layer (plate material), in the copper-plated layer by etching to form a number of tiny recesses (grooves) corresponding to the plate-making information, and then in order to increase the brush resistance of the gravure plate-making roller, a hard chrome layer is formed by chrome plating As the surface strengthening coating layer, plate making (preparation of the layout) is completed in this way.

On the other hand, in recent years, a larger plate making is gradually required, and the gravure plate making roll has been increased in size. As gravure plate-making rolls become larger With the development, the weight of the gravure plate-making roller is increasing day by day, and the subsequent change of the plate is time-consuming, becoming more and more troublesome and causing problems. In addition, since the plate base material is connected to a processing device such as a heat treatment device, it is not ideal to immerse the plate base material in an electroplating bath during copper or chrome plating, and therefore there is a problem that processing is not easy.

In Patent Document 1, as a gravure printing plate sleeve, a rectangular plate piece is bent into a hollow cylindrical shape and joined by welding or the like to form a gravure printing plate sleeve. However, according to the method described in Patent Document 1, there is a problem in that a seam at a joint such as welding occurs, and continuous printing cannot be performed.

[Patent Document 1] Japanese Patent Publication No. 2009-514697

The present invention has been developed in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a seamless sleeve for gravure printing, which can perform seamless continuous printing and can perform plate replacement in a short time. And it is easy to process.

In order to solve the above-mentioned problems, a seamless sleeve for gravure printing includes a seamless sleeve body composed of a platable cylindrical metal base material and having grooves formed on the surface thereof, and a sleeve for covering the sleeve. The surface reinforcement coating layer on the surface of the barrel main body.

The platable cylindrical metal substrate is preferably copper.

The aforementioned surface-strengthening coating layer is preferably a diamond-like carbon (DLC) coating layer, a silicon dioxide coating layer or a chrome-plated coating layer.

According to the present invention, a seamless sleeve for gravure printing can be provided, which can perform continuous printing without a seam, can perform plate change in a short time, and is easy to process, which has a remarkable effect.

Hereinafter, the embodiments of the present invention will be described together with the accompanying drawings, but these embodiments are merely illustrative, and various modifications can be made without departing from the technical spirit of the present invention.

An embodiment of the seamless sleeve for gravure printing of the present invention will be described with reference to FIG. 1 . In the figure, reference numeral 10 represents the seamless sleeve for gravure printing of the present invention. The seamless sleeve 10 for gravure printing of the present invention, as shown in FIG. 1 , includes a seamless sleeve body made of a plated cylindrical metal base material and having grooves 14 formed on the surface thereof. 12. and a surface strengthening coating layer 16 covering the surface of the sleeve body.

An example of the aspect of the manufacturing method of the seamless sleeve for gravure printing of this invention is demonstrated below. First, a cylindrical or cylindrical base roll is prepared, and a metal plating layer for forming a layout composed of a cylindrical metal base material is formed on the base roll by metal plating, and then a plurality of metal plating layers are formed on the surface of the metal plating layer. The fine concave portion (groove) 14 produces the seamless sleeve body 12 in this way.

The metal material used for the cylindrical metal base material is not particularly limited as long as it is a metal material that can be plated. For example, copper, nickel, iron, tin, zinc, and alloys thereof are preferred. For copper, nickel, copper is particularly preferred. The plating method is not particularly limited, and a known method can be used, and electroplating is preferred. The thickness of the metal plating layer is not particularly limited, preferably about 1 μm to 1 mm, more preferably about 20 μm to 1 mm.

The material of the base roll used for metal plating is not particularly limited, and for example, it is stainless steel, aluminum, iron, titanium, and the like. In addition, a release layer may be provided on the base roll, and then metal plating may be performed.

For the formation of the groove 14, a known method such as an etching method, an electronic engraving method, or the like can be used. In the etching method, the surface of the metal plating layer is coated with a photosensitive solution and directly baked, and then the grooves 14 are formed by etching. In the electronic engraving method, the diamond engraving needle is mechanically actuated according to the digital signal, thereby engraving the groove 14 on the surface of the metal coating. The depth of the aforementioned grooves is not particularly limited, and is preferably 5 to 150 μm.

Further, a surface strengthening coating layer 16 is formed on the surface of the metal plating layer (including the part of the groove 14 ) in which the groove 14 is formed. Then, the base roll is removed from the seamless sleeve main body 12 to complete the seamless sleeve 10 for gravure printing of the present invention.

Also in the above example, although the removal of the base roll is performed after the surface strengthening coating layer 16 is formed, the timing of removing the base roll is not particularly limited as long as the metal plating layer for plate formation is formed. .

As the surface strengthening coating layer 16, a DLC coating layer, a silicon dioxide coating formed using a perhydropolysilazane solution as a raw material, etc. can be used, and as the surface strengthening coating layer of a gravure plate-making roll, a conventionally known chrome plating can also be used coating. In the formation of the chrome-plated coating layer, a common chrome-plating method may be used. The thickness of the aforementioned surface-strengthening coating layer 16 is not particularly limited, and is preferably 0.1 to 10 μm.

As a method of forming the DLC coating layer, sputtering method, vacuum evaporation method (electron beam method), ion plating method, MBE method (molecular beam epitaxy method), laser ablation method, ion-assisted method, plasma CVD method can be used A known method such as a method is preferably a sputtering method.

In addition, in the method of forming the silicon dioxide film formed using the perhydropolysilazane solution as a raw material, firstly, a perhydropolysilazane coating layer is formed on the surface of the sleeve body 12 . As a method for forming the perhydropolysilazane coating layer, as described above, perhydropolysilazane is dissolved in a known solvent to prepare a perhydropolysilazane solution, and the perhydropolysilazane solution is sprayed by spraying , inkjet coating, meniscus coating, extrusion coating (fountain coating), dip coating, spin coating, roll coating, wire bar coating, pneumatic blade coating, blade coating, curtain coating, etc. Just apply.

Next, the above-mentioned perhydropolysilazane coating layer is subjected to heat treatment with superheated steam. By this heat treatment, the above-mentioned perhydropolysilazane coating layer is turned into a silicon dioxide film. Although the temperature of the superheated steam is 100°C to 300°C, when a base roll made of CFRP is used, heating over 200°C may cause deterioration of the base roll, so 100°C to 200°C is preferable.

The heat treatment with the superheated steam can be performed in one stage, but it is preferably a plurality of stages of heat treatment including the first and second heat treatments, and the conditions of the first heat treatment are preferably 105°C to 170°C °C, 1 minute to 30 minutes, the conditions of the second heat treatment are set to 140°C to 200°C, 1 minute to 30 minutes, and the temperature of the second heat treatment is set to be higher than the temperature of the first heat treatment. high.

Fig. 2 is a schematic view showing a state in which the seamless sleeve for gravure printing of the present invention is detachably fitted to a printing base cylinder. The gravure plate-making roll 22 can be produced by wrapping the seamless sleeve 10 for gravure printing of the present invention on a printing base cylinder (hollow roll) 20 for performing gravure printing. As the base cylinder 20 for printing, a hollow roll such as a known plate base material can be used as the base cylinder for printing. Since the seamless sleeve for gravure printing of the present invention is detachably sleeved on the printing base cylinder of the gravure printing device, plate replacement and processing are extremely easy, and since there is no seam, it has a seamless sleeve. The great advantage of continuous printing.

10‧‧‧Seamless Sleeve for Gravure Printing 12‧‧‧Seamless Sleeve Body 14‧‧‧Groove 16‧‧‧Surface Strengthening Coating Layer20‧‧‧Substrate Cylinder for Printing 22‧‧‧Gravure Platemaking roll

Fig. 1 is an enlarged cross-sectional explanatory view of a main part of a seamless sleeve for gravure printing of the present invention. Fig. 2 is a schematic diagram of the state in which the seamless sleeve for gravure printing of the present invention is detachably sleeved on the base cylinder for printing, (a) shows the state before sleeve installation, and (b) shows the sleeve to form a gravure plate making state after roll.

10: Seamless sleeve for gravure printing

12:Seamless sleeve body

14: Groove

16: Surface strengthening coating

Claims (4)

A method for producing a seamless sleeve for gravure printing, comprising the steps of: preparing a cylindrical or cylindrical base roll; forming a cylinder by metal plating on the cylindrical or cylindrical base roll After forming a metal plating layer for the layout of the metal substrate, forming grooves on the surface of the metal plating layer to produce a seamless sleeve body; forming a surface on the surface of the metal plating layer formed with the grooves a process of strengthening the coating layer; and a base roll removing process of removing the cylindrical or cylindrical base roll from the seamless sleeve body. The method for producing a seamless sleeve for gravure printing according to claim 1, wherein the cylindrical metal base material is copper. The method for producing a seamless sleeve for gravure printing according to claim 1, wherein the surface strengthening coating layer is a DLC coating layer, a silica coating layer, or a chrome plating coating layer. The seamless sleeve for gravure printing according to any one of claims 1 to 3 The manufacturing method, wherein a peeling layer is provided on the cylindrical or cylindrical base roll, and the metal plating is performed.

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