WO2013118620A1

WO2013118620A1 - Method for paper-polishing gravure plate-making roll, and paper-polishing device

Info

Publication number: WO2013118620A1
Application number: PCT/JP2013/052031
Authority: WO
Inventors: 鈴木　茂; 重田　龍男
Original assignee: 株式会社シンク・ラボラトリー
Priority date: 2012-02-07
Filing date: 2013-01-30
Publication date: 2013-08-15
Also published as: KR20140059844A; CN103930277A; CN103930277B; JPWO2013118620A1; IN2014CN04042A; KR101659772B1; JP6002160B2

Abstract

Provided are a paper-polishing method and a paper-polishing device configured to prevent any incidence of doctor-blade-induced scratching, adhesion of soiling, or other adverse events during printing after a plate has been manufactured. A paper-polishing method in which a paper-polishing device of a fully-automated gravure plate-making processing system is used, a polishing cloth being pressed on the circumferential surface of a plate-making roll, and polishing indentations due to the coated abrasive are formed on the non-coverage portions of a plate surface at a predetermined angle relative to the normal to the circumferential surface of the plate-making roll. The polishing indentations include those at an inclination of ±46-90°.

Description

Paper polishing method and paper polishing apparatus for gravure printing roll

The present invention relates to a paper polishing method and a paper polishing apparatus using a paper polishing apparatus used in a processing unit of a fully automatic gravure plate processing system.

Conventionally, as a fully automatic gravure plate processing system, for example, those disclosed in Patent Documents 1 to 3 are known.

In such a fully automatic gravure plate processing system, using a paper polishing apparatus that is one of the processing units, fine concave portions (polishing cloth paper) that cannot transfer ink at the finishing stage of the gravure plate roll. In this case, the lubricity between the doctor blade and the plate surface is ensured during printing (Patent Document 4, [Prior Art]).

In a paper polishing method using a conventional paper polishing apparatus, as shown in FIG. 8, a polishing mark 102 that is a fine recess is formed in a screw groove shape on a plate-making roll 100 for gravure plate making. Such polishing marks were formed in an angle range of 0 to 45 ° from the vertical direction with respect to the peripheral surface of the plate making roll.

In addition, as shown in FIG. 9, with respect to the plate making roll 100 of gravure plate making, the plate making roll has an angle in a range of ± 0 to 45 ° from the vertical direction with respect to the peripheral surface of the plate making roll. In some cases, polishing marks 104, which are fine concave portions having a sine curve shape, were provided on the peripheral surface.

However, there is a problem that even if the polishing marks are provided as described above, scratches and stains of the doctor blade during printing remain on the printing surface.

JP-A-10-193551 WO2007 / 135898 Publication WO2011 / 125926 JP 2004-268538 A

The present invention has been made in view of the above-described problems of the prior art, and provides a paper polishing method and a paper polishing apparatus that do not cause scratching lines or dirt on the doctor blade during printing after plate making. For the purpose.

In order to solve the above-mentioned problem, the paper polishing method of the present invention uses a paper polishing apparatus of a fully automatic gravure plate processing system, presses abrasive cloth against the peripheral surface of the plate-making roll, and the peripheral surface of the plate-making roll Is a paper polishing method for forming polishing marks by the abrasive cloth paper at a predetermined angle from the vertical direction with respect to the angle, and the angle of the polishing marks is ± 46 to 90 °, preferably ± 46 to 70 °, more preferably ± 50 to It includes polishing marks formed at an angle of 70 °.

In the paper polishing method, the polishing cloth is pressed against the peripheral surface of the rotating plate-making roll, and the polishing cloth is slid in the longitudinal direction of the plate-making roll, whereby the polishing marks by the polishing cloth are polished. Is preferably formed. Abrasive cloth paper (Coated Abrasive) is also called a coated abrasive, and is formed by adhering an abrasive to the surface of paper or cloth. The abrasive cloth paper of the present specification includes sand or glass powder and sand or glass powder, or diamond, silicon carbide or alumina particles on the cloth or paper substrate. Any known abrasive cloth paper, such as a fixed one or other natural or artificial abrasive fixed on a cloth or paper substrate, is included.

It is preferable that the polishing marks include polishing marks at a plurality of angles.

Further, the polishing mark has a first polishing mark angle of ± 50 to 70 ° from the vertical direction with respect to the peripheral surface of the plate making roll and a first polishing mark angle of ± 10 to 30 ° with respect to the vertical direction with respect to the peripheral surface of the plate making roll. And a second polishing mark angle.

Furthermore, it is preferable that the plurality of angles include four types of angles.

It is preferable that the angle calculates the angle of the polishing mark by automatically measuring the diameter of the plate making roll.

The paper polishing apparatus of the present invention is a paper polishing apparatus used in the paper polishing method, wherein a gripping member for rotatably holding a plate-making roll and a peripheral surface of the plate-making roll at an angle of 46 to 90 °. A polishing cloth member for forming polishing marks in a range, an automatic measuring device for automatically measuring the diameter of the plate making roll, and a conveyance for sliding the polishing cloth member in the longitudinal direction of the plate making roll It has a member and a speed control member for controlling the rotational speed of the plate making roll.

The polishing cloth member is a supply reel for supplying polishing cloth, a pressing member for pressing the polishing cloth supplied from the supply reel against the peripheral surface of the plate-making roll, and the pressing member A take-up reel for taking up the polishing cloth that has been pressed against the peripheral surface of the plate-making roll and finished polishing, and the polishing cloth is automatically wound at a certain polishing amount. It is preferable that the reel is wound around a take-up reel.

The pressing member has a concave portion protruding at two spaced locations, and the abrasive cloth paper is pressed against the peripheral surface of the plate-making roll by the concave portion, so that the polishing cloth is made of the plate-making roll. It is preferable to adopt a configuration in which the peripheral surface is pressed at two points.

The plate making roll of the present invention is obtained by the paper polishing method.

According to the present invention, it is possible to provide a paper polishing method and a paper polishing apparatus capable of preventing a doctor blade scraping line and dirt from being adhered during printing after plate making.

1 is a perspective view showing one embodiment of a paper polishing apparatus according to the present invention. 1 is a front view showing one embodiment of a paper polishing apparatus according to the present invention. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a right side view of FIG. 2. It is a principal part enlarged view of FIG. It is typical explanatory drawing which shows the grinding | polishing trace angle of a grinding | polishing trace. It is a schematic diagram which shows the plate making roll in which the grinding | polishing trace was formed. It is a schematic diagram which shows the plate making roll in which the conventional helical grinding | polishing trace was formed. It is a schematic diagram which shows the plate-making roll in which the conventional sine curve-shaped grinding | polishing trace was formed. It is a perspective view which shows the preferable aspect of the polishing cloth member used for the paper polishing apparatus of this invention. It is a side view of the abrasive cloth paper member shown in FIG.

Embodiments of the present invention will be described below, but these embodiments are exemplarily shown, and it goes without saying that various modifications are possible without departing from the technical idea of the present invention. Moreover, the same member is shown with the same code | symbol.

1-4, reference numeral 10 denotes a paper polishing apparatus of the present invention. The paper polishing apparatus 10 is a paper polishing apparatus used in a fully automatic gravure plate processing system, and the paper polishing apparatus 10 suitably performs the paper polishing method of the present invention.

The paper polishing apparatus 10 is used to form polishing marks 18 on the

gripping members

14a and 14b that rotatably hold the plate-making roll 12 and the peripheral surface 16 of the plate-making roll 12 in an angle range of 46 to 90 °. An abrasive cloth paper member 20, an automatic measuring device 22 for automatically measuring the diameter d of the plate making roll 12, and the abrasive cloth paper member 20 by sliding the abrasive cloth paper member 20 in the longitudinal direction of the plate making roll 12 The conveying member 24 that reciprocates the member 20 on the peripheral surface 16 and a speed control member 26 that controls the rotational speed of the plate-making roll 12 are configured.

Note that reference numeral 28 denotes a control panel of the paper polishing apparatus 10. In the illustrated example, the conveying member 24 includes a frame member 30, a belt member 32 housed therein, and a motor 34 that controls the belt member. Since the conveying member 24 has only to have a function of sliding the abrasive cloth paper member 20 in the longitudinal direction of the plate-making roll 12, a belt screw, a ball screw, a chain, and the like are combined with a frame member. Thus, it goes without saying that the abrasive cloth paper member 20 can be slid in the longitudinal direction of the plate-making roll 12.

Abrasive cloth paper is detachably attached to the surface of the abrasive cloth paper member 20, and the paper cloth is polished by attaching the abrasive cloth paper of a desired count. As shown in FIG. 5, the automatic measuring device 22 includes a reference end surface, and a scale member 36 that is driven up and down by an air cylinder 35 is housed in an outer frame 38. Thereby, it is possible to automatically measure the diameter d of the plate-making roll 12 as shown in FIG. Then, after the diameter d of the plate making roll 12 is automatically measured, the angle of the polishing mark 18 is calculated based on the diameter d. This calculation is performed by software incorporated in the paper polishing apparatus 10.

FIG. 6 shows a schematic explanatory diagram so that the polishing mark angle of the polishing mark 18 shown in FIG. 7 is clear. FIG. 7 shows a plate making roll 40 in which the paper polishing method of the present invention is used to form the polishing marks 18 that are fine recesses on the non-imaged portion 11 of the plate surface using the paper polishing apparatus 10. As shown in FIG. 6, in the example of FIG. 7, the predetermined angle ± θ that is the first polishing mark angle from the vertical direction Y with respect to the peripheral surface 16 of the plate making roll 12 and the second polishing mark angle. It is composed of a predetermined angle ± φ. And the longitudinal direction of the said plate-making roll 12 with which the conveyance member 24 is slid turns into the X direction of FIG.

That is, in the example of FIG. 7, the polishing marks 18 are + 22 °, + 67 °, −22 °, and −67 ° from the vertical direction Y with respect to the peripheral surface 16 of the plate making roll 12 as well shown in FIG. It is composed of various angles. Further, in the example of FIG. 6, a polygonal polishing mark 42 is shown for convenience of explanation, but the polishing mark 42 is only described as an explanation of the polishing angle, and the actual polishing mark is shown in FIG. 7. A plurality of lines are combined like a polishing mark 18 like this.

In this way, the polishing cloth is pressed against the peripheral surface of the plate-making roll using the paper polishing apparatus 10, and the polishing marks by the polishing cloth at a predetermined angle from the vertical direction with respect to the peripheral surface of the plate-making roll are printed on the plate surface. If it is formed in the non-image area, it is possible to prevent the doctor blade from being scratched or contaminated during printing after plate making.

Next, a preferred embodiment of the polishing cloth member used in the paper polishing apparatus of the present invention will be described based on FIG. 10 and FIG.

10 and 11, reference numeral 44 denotes an abrasive cloth member. The abrasive cloth paper member 44 is a delivery reel 48 for supplying the abrasive cloth paper 46 and a pressing force for pressing the abrasive cloth paper 46 supplied from the delivery reel 48 against the peripheral surface 16 of the plate making roll 12. A member 50 and a take-up reel 52 for winding up the polishing cloth 46 that has been pressed by the pressing member 50 against the peripheral surface 16 of the plate-making roll 12 and finished polishing. 46 is configured to be automatically wound around the take-up reel 52 for each fixed polishing amount. For example, a new abrasive cloth 46 can be automatically supplied little by little every time the plate-making roll 12 rotates once. With this configuration, a new polishing cloth 46 is always automatically supplied every fixed amount of polishing.

The pressing member 50 has a recessed portion 54 from which two spaced apart locations P1 and P2 protrude, and the abrasive cloth 46 is pressed against the peripheral surface 16 of the plate-making roll 12 by the recessed portion 54. Thus, the polishing cloth 46 is configured to be pressed against the peripheral surface 16 of the plate making roll 12 at two points. By comprising in this way, it becomes possible to grind suitably along the circular-arc-shaped peripheral surface 16 of the said to-be-made roll 12.

10: Paper polishing device, 11: Non-imaged part, 12: Plate making roll, 14a, 14b: Holding member, 16: Peripheral surface, 18: Polishing trace, 20: Polishing cloth member, 22: Automatic measuring device, 24 : Conveying member, 26: speed control member, 28: control panel, 30: frame member, 32: belt member, 34: motor, 35: air cylinder, 36: scale member, 38: outer frame, 40: plate making roll, 42 : Polygonal polishing marks, 44: Abrasive cloth paper member, 46: Abrasive cloth paper, 48: Feeding reel, 50: Pressing member, 52: Take-up reel, 54: Recessed part, 100: Plate making roll, 102, 104 : Polishing mark, d: diameter, P1, P2: two spaced apart, X: longitudinal direction, Y: vertical direction, θ: first polishing mark angle, φ: second polishing mark angle.

Claims

Using a paper polishing apparatus of a fully automatic gravure plate processing system, the polishing cloth is pressed against the peripheral surface of the plate-making roll, and the polishing mark by the polishing cloth at a predetermined angle from the vertical direction with respect to the peripheral surface of the plate-making roll. Is a paper polishing method for forming a film on a non-image area of a printing plate, wherein the polishing mark includes a polishing mark having an angle of ± 46 to 90 °.
In the paper polishing method, the polishing cloth is pressed against the peripheral surface of the rotating plate-making roll, and the polishing cloth is slid in the longitudinal direction of the plate-making roll, whereby the polishing marks by the polishing cloth are polished. The paper polishing method according to claim 1, wherein: is formed.
The paper polishing method according to claim 1 or 2, wherein the polishing mark includes polishing marks at a plurality of angles.
The polishing mark has a first polishing mark angle of ± 50 to 70 ° from the vertical direction with respect to the peripheral surface of the plate making roll and a second polishing mark angle of ± 10 to 30 ° with respect to the vertical direction with respect to the peripheral surface of the plate making roll. The paper polishing method according to any one of claims 1 to 3, further comprising a polishing mark angle.
The paper polishing method according to claim 3 or 4, wherein the plurality of angles include four kinds of angles.
The paper polishing method according to any one of claims 1 to 5, wherein the angle is obtained by automatically measuring a diameter of a plate-making roll and calculating an angle of a polishing mark.
A paper polishing apparatus used in the paper polishing method according to any one of claims 1 to 6,
A gripping member that rotatably grips the plate making roll; and
An abrasive cloth member for forming polishing marks in an angle range of 46 to 90 ° on the peripheral surface of the plate-making roll;
An automatic measuring device for automatically measuring the diameter of the plate making roll, and
A conveying member that slides the abrasive cloth paper member in the longitudinal direction of the plate-making roll;
A speed control member for controlling the rotation speed of the plate making roll;
A paper polishing apparatus comprising:
The polishing cloth member is a supply reel for supplying polishing cloth, a pressing member for pressing the polishing cloth supplied from the supply reel against the peripheral surface of the plate-making roll, and the pressing member A take-up reel for taking up the polishing cloth that has been pressed against the peripheral surface of the plate-making roll and finished polishing, and the polishing cloth is automatically wound at a certain polishing amount. The paper polishing apparatus according to claim 7, wherein the paper polishing apparatus is wound around a take-up reel.
The pressing member has a concave portion protruding at two spaced locations, and the abrasive cloth paper is pressed against the peripheral surface of the plate-making roll by the concave portion, so that the polishing cloth is made of the plate-making roll. The paper polishing apparatus according to claim 8, wherein the paper polishing apparatus is pressed against the peripheral surface at two points.
A plate-making roll obtained by the paper polishing method according to any one of claims 1 to 6.