KR101816237B1 - Both-side gravure printing apparatus having adjustable process - Google Patents

Abstract

An apparatus for performing gravure printing on both sides of a medium for printing comprises: a main body having a feeder (11) and a collector (12); a first printing means (20) which includes a transfer roll (25) and a gravure roll (23) supported on the main body, and brings the transfer roll (25) into contact with one surface of a medium for printing to print; a second printing means (30) which includes a transfer roll (35) and a gravure roll (33) supported on the main body, and brings the transfer roll (35) into contact with the other surface of the medium for printing to print; a displacement means (40) installed to cause a movement of a position of at least one among the first and the second printing means (20, 30); and a control means (50) to control the first and the second printing means (20, 30) and the displacement means (40). Accordingly, a gravure printing system for small quantity batch production is realized, and tact time is reduced based on a structure for easy replacement of some printing rolls to improve productivity of mass production and reduce costs.

Description

[0001] The present invention relates to a two-sided gravure printing apparatus having an adjustable processability,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravure printing apparatus, and more particularly, to a two-sided gravure printing apparatus having process variability for application to a mass production system of a small quantity production method.

In general, gravure printing is a method that enables fine and sophisticated printing using a concave plate, and its application range is gradually expanded to books, wallpaper, board, and electronic devices including PCB. Depending on the feeding method, it may be divided into a single sheet type and a roll type. In any case, high speed printing, multicolor printing, and double-sided printing can be applied. Various efforts have been made to apply gravure in an optimal manner to a specific product requiring printing on both sides.

Related to the gravure double-sided printing, reference can be made to prior art documents such as Japanese Patent Application Laid-Open No. 62-023755 (Prior Art 1), Korean Patent Registration No. 1747962 (Prior Art 2), and the like.

In the prior art document 1, a pair of printing rolls are disposed in the lateral direction in an apparatus for simultaneously gravure printing on both sides of a long object, an ink supply nozzle is disposed in the vicinity of the printing roll, and an ink recovery table is disposed below the printing roll . Therefore, it is expected that the atmospheric contact of the ink is inhibited to the maximum, thereby stabilizing the physical properties and preventing deterioration.

In the prior art 2, there are provided a supply module, a first reversal guide section for reversing the traveling direction of the printing paper, a printing module for printing on one surface, a second reversing guide section for reversing the traveling direction of the printed printing paper, And a collection module for collecting the completed printing paper. Thus, an effect of preventing the contraction, expansion and departure of the printing paper in the double-sided printing process is expected.

However, according to the above-mentioned prior art literature, there is room for improvement to some extent in view of the lack of technical factors to be applied to the mass production system which requires small quantity production of various kinds of products.

JP-A-62-023755 entitled " Double-side gravure printing device "(published on Jan. 31, 1987). Korean Registered Patent No. 1747962 entitled " Gravure printing device capable of double-sided printing "(published on June 15, 2017).

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the prior art, and it is an object of the present invention to provide a mass production system of a small quantity production type, And to provide a gravure printing apparatus.

In order to achieve the above object, the present invention provides an apparatus for performing gravure printing on both sides of an object, comprising: a body having a feeder and a collector; A first printing means having a gravure roll and a transfer roll supported by the main body, for printing the transfer roll in contact with one surface of the print; A second printing means having a gravure roll and a transfer roll supported by the main body, for printing the transfer roll in contact with the other surface of the print; Displacement means installed to cause at least one positional movement among the first printing means and the second printing means; And control means for controlling the first printing means, the second printing means, and the displacement means.

In a detailed configuration of the present invention, the first printing means is mounted on the first frame and supplies ink to the ink nozzles.

In a detailed configuration of the present invention, the second printing means is mounted on the second frame and supplies ink to the ink pan.

In the detailed construction of the present invention, the displacement means is characterized by having a rail formed in an arc or circular shape for the movement of the first printing means and the second printing means.

As a detailed configuration of the present invention, the displacement means further comprises a pressure regulator for varying the contact pressure of the gravure roll.

In the detailed configuration of the present invention, the control means recognizes the mark of the object with the images of the first camera and the second camera, and synchronizes the first printing means and the second printing means.

As a modification of the present invention, the control means calculates the replacement timing of the gravure roll and alerts.

As described above, according to the present invention, there is an effect of improving productivity and cost reduction in mass production by reducing the tack time based on a structure in which some printing rolls can be easily replaced while implementing a gravure printing system of a small quantity production method.

BRIEF DESCRIPTION OF THE DRAWINGS Fig.
Fig. 2 is a schematic view showing another example of the apparatus according to the present invention in a plan view
Figure 3 is a schematic representation of the device according to the invention in elevation;
Figure 4 is a schematic diagram showing the displacement means of the device according to the invention
Figure 5 is a block diagram showing the control means of the device according to the invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention proposes an apparatus for performing gravure printing on both sides of an object to be printed. The printed matter P can be applied to both the single sheet type and the roll type, but it is suitable for a case having a certain thickness rather than a thin sheet. A higher printing quality is required on either side of the object on both sides of the object to be differentiated into main / sub.

A main body according to the present invention is a structure having a feeder (11) and a collecting machine (12). The feeder 11 can be constituted by a conveyor or a winding reel by conveying an object at a predetermined speed. The recoverer 12 can be constructed in the same manner as the feeder 11 and an intermediate processor 15 is selectively constructed between the feeder 11 and the recoverer 12. The intermediate processor 15 performs operations such as coating, cutting, and the like in addition to gravure printing.

According to the present invention, the first printing means (20) is provided with a gravure roll (23) and a transfer roll (25) supported by the main body, and the transfer roll (25) is brought into contact with one side of the object do. In FIG. 1, the first printing means 20 exemplifies a state in which the upper surface of an object is printed. The gravure roll 23 of the first printing means 20 and the transfer roll 25 are driven in contact with each other and print through the final contact of the abrasion-resistant transfer roll 25.

The first printing means (20) is mounted on the first frame (21) and supplies ink to the ink nozzles (24) as a detailed configuration of the present invention. The ink nozzle 24 and the doctor blade 27 are brought into contact with the gravure roll 23 because the ink pan is installed on the upper surface side of the object to be printed. The gravure roll 23, the transfer roll 25, the ink nozzle 24, and the doctor blade 27 are mounted on one first frame 21 and movable at the same time.

According to the present invention, the second printing means (30) is provided with a gravure roll (33) and a transfer roll (35) supported by the main body, and the transfer roll (35) is brought into contact with the other surface of the object do. In Fig. 1, the second printing means 30 exemplifies a state in which the lower surface of the object is printed. The gravure roll 33 of the second printing means 30 and the transfer roll 35 are driven in contact with each other and print through the final contact of the transfer roll 35 having abrasion resistance.

The second printing means (30) is mounted on the second frame (31) and supplies ink to the ink pan (32) as a detailed configuration of the present invention. The gravure roll 33 is partially immersed in the ink pan 32 and the doctor knife 37 is brought into contact with the ink pan 32 because the ink pan 32 can be easily installed on the lower surface side of the object to be printed. The ink pan 32, the gravure roll 33, the transfer roll 35 and the doctor knife 37 are mounted on one second frame 31 and are movable at the same time. The use of the ink pan 32 in the second printing means 30 is advantageous in terms of high quality compared with the use of the ink nozzle 24 in the first printing means 20. [ However, the configuration in which the second printing means 30 uses the ink nozzles 24 is not excluded.

At this time, the gravure rolls 23 and 33 of the first printing means 20 and the second printing means 30 are detachably mounted on the first frames 21 and 31, respectively. The first printing means 20 may be replaced by two gravure rolls 23 as shown in Fig. 1, and the second printing means 30 may be replaced with the first printing means 20 Or the like.

On the other hand, although the gravure rolls 23 and 33 which are opposed to each other in the first printing means 20 and the second printing means 30 have been shown and described, in the case of multicolor printing, they may be arranged in the same manner. In any case, the gravure rolls 23 and 33 and the transfer rolls 25 and 35 can be independently driven.

According to the present invention, the displacement means (40) is provided to cause at least one of the first printing means (20) and the second printing means (30) to move. The positional shift of the gravure rolls 23 and 33 and the transfer rolls 25 and 35 by the displacement means 40 includes up-down movement as well as horizontal movement. In either case, the position shift is usefully utilized in the process of replacing the gravure rolls 23, 33 or the transfer rolls 25, 35.

As a detailed configuration of the present invention, the displacement means (40) is provided with a rail (41) formed as an arc or a circle for the movement of the first printing means (20) and the second printing means (30) do. 1 and 2 illustrate a semicircular rail 41 formed in a range of 180 DEG, but may be appropriately selected within a range of 360 DEG according to the field conditions. The rail 41 is provided with a large-diameter outer portion and a small-diameter inner portion concentrically. A rack 42 is provided on the inner or outer surface of the opposing rail 41. A pinion 44 and a movement regulator 45 are mounted on the frames 21 and 31 of the first printing means 20 and the second printing means 30. The shift regulator 45 drives the pinion 44 using a motor and a worm gear (not shown), and the pinion 44 rotates in engagement with the rack 42 to rotate the frame 21 (31) Free movement.

For example, referring to FIGS. 1 and 2, it is possible to check and replace the first printing means 20 'and 30' on the other side while printing is performed on the first printing means 20 and 30 on one side.

The displacement means 40 further comprises a pressure regulator 47 for varying the contact pressure of the gravure rolls 23 and 33. [ 4 illustrates a state in which the push rod 48 of the pressure regulator 47 presses the transfer roll 25 against a rotary ring (bearing) provided on the drive shaft. A separate pressure regulator 47 may be constituted to cause the gravure roll 23 and the components associated therewith to move up and down. In either case, when the gravure rolls 23, 33 or the transfer rolls 25, 35 are replaced, the push rod 48 is lifted to the maximum by the pressure regulator 47 to release the pressurized state.

At this time, it is preferable that the pressure sensor 55 is provided on the push rod 48 of the pressure regulator 47 so as to automatically recognize the pressurized state and the released state.

According to the present invention, the control means (50) controls the first printing means (20), the second printing means (30) and the displacement means (40). The control means 50 is based on a controller 58 equipped with a microprocessor, a memory and an I / O interface. The memory stores the set control algorithm in main program, subroutine program, and data format. The first printing means 20, the second printing means 30 and the displacement means 40 are connected to the output interface. The controller 58 additionally performs an algorithm suitable for the multi-item small volume production method.

The control means 50 recognizes the mark of the object to be printed by the images of the first camera 51 and the second camera 52 and outputs the first printing means 20 and the second printing means 30) are synchronized. The first camera 51 and the second camera 52 are installed on one side and the other side, respectively, of the object to obtain an image of the mark as well as the printing state. The mark is applied to the object to recognize the position of the pattern in double-sided printing or multicolor printing. The controller 58 reads the signals of the cameras 51 and 52 and adjusts the speed of at least one of the transfer rolls 25 and 35 or the feeder 11. [

As a modification of the present invention, the control means (50) calculates the replacement timing of the gravure rolls (23) and (33) and alerts them. The controller 58 inputs the signals of the first camera 51, the second camera 52 and the velocity sensor 56 since the replacement period of the gravure rolls 23 and 33 is relatively short in the small quantity production system of various types . For example, the number of marks input to the upper and lower cameras 51 and 52 is counted or the running length of the object inputted to the speed sensor 56 is calculated. When the end of the set job is imminent, an alarm is issued to instruct the replacement of the gravure rolls 23 and 33.

1, the central first printing means 20 is moved to the left and placed at the position 20 ', and the first printing means 20 on the right side is moved to the center and then pressed by the pressure regulator 47, And the gravure roll 23 at 20 'is replaced with another to prepare for the next process. Of course, in this process, the proximity sensor 54 located at the center of the rail 41 may be used to guide the first printing means 20 to the correct position.

On the other hand, if the proximity sensor 54 and the pressure sensor 55 are connected to the controller 58 in addition to the cameras 51 and 52 and the speed sensor 56, the replacement operation of the gravure rolls 23 and 33 can be performed at least partially Automated configurations are also possible.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

11: Feeder 12:
15: intermediate processor 20: first printing means
21, 31: frame 23, 33: gravure roll
24: ink nozzles 25, 35: transfer roll
27, 37: doctor knife 30: second printing means
32: ink pan 40: displacement means
41: rail 42: rack
44: Pinion 45: Travel adjuster
47: pressure regulator 48: push rod
50: control means 51, 52: camera
54: proximity sensor 55: pressure sensor
56: speed sensor 58: controller

Claims (7)

1. An apparatus for performing gravure printing on both sides of an object, comprising:
A main body having a feeder (11) and a collecting device (12);
A first printing means (20) having a gravure roll (23) and a transfer roll (25) supported by the main body, for printing the transfer roll (25) in contact with one surface of an object;
A second printing means (30) having a gravure roll (33) and a transfer roll (35) supported by the main body and printing the transfer roll (35) in contact with the other surface of the object;
Displacement means (40) installed to cause at least one of the first printing means (20) and the second printing means (30) to move; And
And control means (50) for controlling the first printing means (20), the second printing means (30), and the displacement means (40)
The first printing means 20 is mounted on the first frame 21, supplies ink to the ink nozzles 24,
The second printing means 30 is mounted on the second frame 31 and supplies ink to the ink pan 32,
The displacement means 40 is provided with a rail 41 formed in an arc or a circle for the movement of the first printing means 20 and the second printing means 30,
The displacement means 40 further comprises a pressure regulator 47 for varying the contact pressure through the push rod 48 so that the gravure rolls 23 and 33 can be replaced,
Wherein the control means (50) calculates and alerts the replacement timing of the gravure rolls (23) and (33). delete delete delete delete The method according to claim 1,
The control means 50 recognizes the mark of the object by the images of the first camera 51 and the second camera 52 and synchronizes the first printing means 20 and the second printing means 30 Wherein the printing apparatus is a two-sided gravure printing apparatus. delete

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