KR20160058513A - Ink application Device for Printing Machine - Google Patents

Abstract

An ink application device for a printing machine is provided to reduce costs for maintenance and production as ink is able to be scraped out by adding an entirely uniform power using a gas pressure. For the above purpose, the present invention comprises: a main body having a groove part formed in a front side; an ink scraper which scrapes ink applied excessively as the ink is applied on a roller which is fixated on the main body and is close to a front side of the groove part; a support which supports the main body on a rear side of the main body; a plurality of joints which connects an upper part with the support in order to be able to rotate; and an airbag installed between the main body and the support, pushing the main body away from the support such that the front end of the ink scraper is in contact with the roller under a predetermined pressure as gas is injected inside.

Description

[0001] Ink application Device for Printing Machine [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ink applying apparatus for a printer, and more particularly, to an ink applying apparatus for a printer for applying ink to a roller of a printing press.

Typically, a printing press is a machine that prints on paper by pressing it with ink.

BACKGROUND OF THE INVENTION [0002] In recent years, offset printing systems, such as offset printing machines, gravure printing machines, flexographic printing machines, and the like, in which printing paper is interposed between rotating cylindrical rollers, are widely used.

BACKGROUND ART [0002] In recent years, flexo printing machines have been widely used for printing corrugated paper, wrapping paper, etc., which are widely used for packaging various products.

A technique for a conventional flexographic printing press is disclosed in Patent Publication No. 10-0112819.

The above publication discloses that the ink supplied between the anilox roller 26 and the ink roll 28 is transferred to the printing plate 10 having the printing plate 10 mounted thereon.

However, in the conventional art having the above-described structure, when an anilox roll is installed at a length of about 1 to 5 m and both ends are rotatably supported when used in a large-sized printing machine, sagging occurs at its center due to its own weight. The distance between the center and the center can not be maintained constantly, and the distance between the center and the center increases.

Therefore, in order to narrow the interval caused by sagging or bending at the center of the doctor roller, the position of the doctor roller is gradually moved toward the ink transfer roller, and thus the pressure acting between the doctor roller and the both ends of the ink transfer roller is unnecessarily increased The ink transfer roller or the doctor roller may be cut off or the bearing supporting the rotation may be damaged and an uneven wear phenomenon may occur in which the abraded state at both ends is worsened as compared with the central portion.

On the other hand, in the conventional printing machine, a doctor blade in the form of a sharp blade may be installed on one side of the ink transfer roller in order to scrape excess ink applied in place of the doctor roller.

However, since the ink transfer roller and the doctor blade must be manufactured with high strength in order to maintain a uniform uniform pressure between the ink transfer roller and the doctor blade and to minimize the wear, a ceramic or chrome coated product is required for this purpose There is a problem that the manufacturing cost and the replacement cost are increased by about 10 times, and a solution is required.

Disclosure of the Invention The present invention has been made in view of the above problems, and it is an object of the present invention to provide an ink applying device for a printing machine which can reduce the manufacturing cost and the maintenance cost since the ink can be applied while shortening the life span or uneven wear caused by abrasion of the roller It has its purpose.

Another object of the present invention is to provide an ink application device for a printer which can easily and conveniently wash ink when cleaning residual ink.

The ink applying apparatus for a printing press proposed by the present invention includes a main body in which a groove portion opened to one side where a roller is located is formed in front of the main body and an overcoating member which is fixed to the main body and is coated with ink on a roller close to the front side of the groove portion A plurality of joints rotatably connecting an upper portion of the main body and the support base, and a plurality of joints provided between the main body and the support frame, And pushes the main body from the support so that the tip of the ink scraper comes into contact with the roller at a certain pressure.

The inner surface of the groove portion of the body is coated with a surfactant resin.

The ink scratch is installed so as to form an ink sump in which ink can be accumulated together with the groove portion and the roller as the leading end contacts with the roller at a certain pressure.

 In addition, an auxiliary scraper may be provided on the upper portion of the main body in a manner symmetrical with the ink scraper in order to block the gap between the groove and the roller.

The joint is installed to rotatably connect the body and the support by hinge engagement using spherical treatment.

The airbag is formed in a substantially rod shape upon inflation.

The present invention may further comprise an elastic member for applying a pulling force to the main body.

In addition, the present invention may further comprise an ink supply unit for supplying ink to the groove of the main body.

Wherein the ink supply unit comprises: an ink tank in which ink is stored; an ink supply pipe forming a passage for transferring the ink of the ink tank to the groove of the main body; a pump for feeding the ink to the groove through the ink supply pipe; And an ink recovery table for receiving the ink and recovering the ink into the ink container.

According to the ink application device for a printer according to the embodiment of the present invention, it is possible to closely contact the ink scratches with the rollers with uniform force by using the inflating force of the airbag. Since the main body, the ink scraping, and the airbag are made of a flexible structure, it is possible to sag or bend together in response to the phenomenon that the center of the roller is sagged or totally bent.

Therefore, it is possible to prevent damage, deformation and uneven wear of the roller due to unreasonable force applied to the uniform ink application. Therefore, it is possible to reduce the maintenance cost due to the extension of the parts life and to prevent the warpage and sagging of the roller and the ink scraping It is unnecessary to use a high-strength material unnecessarily, which can greatly reduce the manufacturing cost.

According to the ink application device for a printer according to the embodiment of the present invention, since the main body and the support are connected by spherical treatment and the airbag is installed on the back of the main body, the ink scraper contacts with the roller, It is possible to absorb impact while flexibly responding.

Further, according to the ink application device for a printer according to the embodiment of the present invention, since the inner surface of the groove portion is coated with the surface active resin, it is possible to reduce the surface tension of the ink located inside the groove portion.

Therefore, when the inner surface of the groove is washed to change the color of the ink, it is possible to quickly and cleanly wash the residual ink while using less washing water, so that it is possible to prevent environmental pollution due to waste water reduction and to reduce waste water treatment cost.

1 is a perspective view showing an ink applying apparatus for a printer according to a first embodiment of the present invention.
2 is a side view showing an ink applying apparatus for a printer according to a first embodiment of the present invention.
3 is a partially enlarged side sectional view showing an ink applying apparatus for a printer according to a first embodiment of the present invention.
4 is a side sectional view showing a state in which the main body of the ink application device for a printer according to the first embodiment of the present invention is rotated forward and backward.
5 is a side sectional view showing an airbag in an ink applying device for a printer according to a first embodiment of the present invention.
6 is a piping diagram showing an ink supply device in an ink application device for a printer according to the first embodiment of the present invention.
7 is a perspective view showing a joint in an ink applying apparatus for a printer according to a second embodiment of the present invention.
8 is a plan view showing a joint in an ink applying apparatus for a printer according to a second embodiment of the present invention.
9 is a piping diagram showing an ink supply unit in an ink application device for a printer according to a third embodiment of the present invention.
10 is a side view showing a nozzle of the ink supply portion in the ink application device for a printer according to the third embodiment of the present invention.

Next, preferred embodiments of the ink application device for a printer according to the present invention will be described in detail with reference to the drawings.

In the following description, the same reference numerals are used for the same technical elements, and detailed descriptions for avoiding redundant description are omitted.

The embodiments described below are intended to illustrate the preferred embodiments of the present invention in an effective manner and should not be construed to limit the scope of the present invention.

In the drawing, the dotted arrows indicate the direction of movement of ink and wash water.

1 to 3, the ink applying apparatus for a printer according to the first embodiment of the present invention includes a main body 10, an ink scraper 20, an auxiliary scraper 24, a support base 30, (40), an air bag (50), an elastic member (60), and an ink supply unit (80).

The main body 10 is disposed on one side of the roller 2 and long in parallel with the roller 2.

The main body 10 is made of aluminum and may be made of stainless steel, carbon fiber reinforced plastics (CFRP), or the like.

The body 10 is formed with a groove 12 opened at one side thereof.

The inner surface of the groove 12 is coated with a surfactant resin so as to prevent sticking of residual ink upon exchange or cleaning of the ink.

As the above-mentioned surfactant resin, Teflon or PE (polyethylene) which is excellent in coating power against the inner surface of the groove portion 12 and excellent in surface activity for aqueous ink and liquid ink having low viscosity can be used.

The roller (2) is an ink transfer roller (anilox roller) having a plurality of grooves (halftone dots) capable of receiving ink on its surface, and may be a roller provided with a printing plate.

The ink scraper 20 is disposed in front of the main body 10 and is in contact with the roller 2 at the tip thereof as the ink is applied to the roller 2 near the front side of the groove 12, .

The ink scraper 20 is formed in a thin rod-like shape and is inclined so that its height gradually decreases from the front end toward the rear end.

The ink scraper 20 is made of PE (polyethylene), or may be made of metal or synthetic resin.

The ink scraper 20 is installed so as to form an ink sump 21 in which ink can be accumulated together with the groove 12 and the roller 2 as the leading end contacts with the roller 2 at a constant pressure.

The auxiliary scraper 24 is installed vertically symmetrically with the ink scraper 20 on the basis of the horizontal center line of the groove 12.

The auxiliary scraper 24 intercepts the upper surface of the ink sump 21 above the groove 12 to prevent foreign matter from entering.

The auxiliary scraper 24 is formed in a thin rod-like plate shape like the ink scraper 20 and has a distal end that contacts the roller 2 as the main body 10 is pushed forward due to the inflation of the airbag 50 Or to maintain fine spacing.

The support base 30 has a substantially long bar shape and is installed in parallel with the main body 10 on the rear side of the main body 10.

It is possible to connect the both ends of the support frame 30 to the support frame 3 for supporting both ends of the roller 2. [

The support base 30 is made of aluminum and may be made of metal or carbon fiber reinforced plastics (CFRP).

The joint 40 is installed to rotatably connect the upper portion of the main body 10 and the support 30.

The joint 40 is hinge-coupled using a spherical pair so that the body 10 and the support 30 are connected to each other so as to be relatively rotatable in an arbitrary direction.

For example, the joint 40 may include a connecting shaft 41 vertically installed on the upper portion of the main body 10 and fixed to the main body 10 and having a spherical ball portion 42 formed at an upper end thereof, One end of which is fixedly supported on the support base 30 and the other end of which is connected to the ball portion 42 of the connection shaft 41, And a connecting arm 43 on which a hinge groove 44 is formed so as to be slidably engaged with the connecting arm 43 in spherical contact.

The airbag 50 is installed between the main body 10 and the support base 30 and inflates as the gas is injected into the main body 10 so that the tip of the ink scraper 20 comes into contact with the roller 2 at a constant pressure, 10 from the support stand 30.

The airbag (50) is installed below the main body (10) and the support base (30).

The airbag 50 has a substantially cylindrical shape when inflated and a gas such as compressed air is injected into the airbag 50 for inflation.

Although not shown in the drawing, the airbag 50 may be connected to an inlet / outlet passage for introducing or withdrawing a gas such as compressed air, and a valve for controlling gas entry / exit may be provided in the inlet / outlet passage.

The airbag 50 is made of a flexible rubber tube, a resin tube, or the like.

The airbag 50 has a certain volume and may be made of a material having elasticity so that the volume ratio can be increased by about 0 to 20% according to the pressure of the gas acting inside.

4, a support groove 35 for supporting the airbag 50 may be further formed on the support base 30, and a support groove 35 for supporting the airbag 50 may be formed on the rear side of the main body 10. [ It is possible to further form the projection 15 that abuts the end surface of the airbag 50 when inflated.

The protrusion 15 can be curved at its end portion so as to naturally come into contact with the airbag 50.

As shown in FIG. 5, the airbag 50 expands the lower portion of the main body 10 toward the front where the rollers 2 are positioned while expanding the gas such as compressed air when the gas is injected into the airbag 50, (10) rotates about the ball portion (42) formed on the connecting shaft (41) of the joint (40).

In order to shrink the inflated air bag 50, the inflating air bag 50 is drawn out from the air bag 50 through the entry / exit path. At this time, the elastic member 60 pulls the main body 10 backward, The gas is drawn out from the airbag 50 to shrink the airbag 50 as the airbag 50 is pressed.

The elastic member (60) is installed to apply a pulling force to the lower portion of the main body (10). The body 10 is forced to rotate in a direction opposite to the direction in which the main body 10 is rotated by the inflation of the airbag 50 (the direction in which the main body 10 approaches the support 30).

The elastic member 60 is installed to apply a pulling force to the main body 10 with a force smaller than a force pushing the main body 10 when the airbag 50 inflates. As the airbag 50 expands, 10 can be pushed out.

The elastic member 60 is formed using a tension coil spring, and may be formed using a compression coil spring, a torsion spring, or the like.

In the ink applying apparatus for a printing machine according to the first embodiment of the present invention configured as described above, the airbag 50 and the elastic member 60 can stably rotate the main body 10 when the main body 10 is rotated forward and backward It is also possible to further include the rotation guide portion 70.

The rotation guide portion 70 includes a fixing guide 71 fixed to the lower end of the support 30 and having a guide hole 72 formed therein and a fixing guide 71 fixed to the lower end of the main body 10, And a flow guide 74 which is assembled in the guide hole 72 so as to be pivotable up and down (see FIGS. 2 to 4).

The flow guide 74 may be provided with the elastic member 60.

The ink supply unit 80 supplies ink to the groove 12 of the main body 10.

2 and 6, the ink supply unit 80 includes an ink reservoir 81 for storing ink and a passage for transferring the ink of the ink reservoir 81 to the groove 12 of the main body 10 A pump 84 for feeding the ink to the groove 12 through the ink supply pipe 82 and an ink supply pipe 82 for discharging the ink discharged from the groove 12 to the ink chamber 81 And an ink recovery table 86 for recovery.

The distribution passage 13 for distributing the ink uniformly throughout the groove 12 is formed in the groove 12 before the ink supplied through the ink supply pipe 82 is supplied to the groove 12, As shown in FIG.

A plurality of ink outlets 14 are formed in the main body 10 along the longitudinal direction so that ink is uniformly discharged from the distribution passage 13 to the grooves 12.

In addition, discharge holes 16 are formed at both ends of the groove 12 of the main body 10 to discharge ink by the ink recovery table 86.

The discharge holes 16 are provided at the lower end and the center of the groove portion 12, respectively.

The center hole 16 is provided to prevent overflow from the ink sump 24.

The ink recovery table 86 is installed below the both ends of the main body 10 and receives the ink discharged from the discharge holes 16.

It is also possible that the discharge hole 16 is provided with a discharge pipe 87 for transferring the ink to the ink recovery table 86.

An outlet is formed in each of the ink recovery bases 76, and a return pipe 78 for transferring the ink to be discharged to the ink container 71 is connected to the outlet.

7 and 8, the ink applying apparatus for a printer according to the second embodiment of the present invention is characterized in that the joint 40 is fixed to the support base 30 and the connection arm 43 is movable back and forth And a fixing bolt 48 for fixing the connection arm 43 to the bed 45. The fixing bolt 48 is fixed to the bed 45. The bed 45 has a guide groove 46, And a gauge projection 49 provided at one side of the bed 45 and screwed to the bed 45 and restricting the forward movement of the bed 45 while the leading end is hooked on the gauge jaw 47 It is possible.

The gauge projection 49 may be formed using a bolt 49.

A nut 49a screwed to the bolt 49 may be fixed to one side of the bed 45. [

The joint 40 configured as described above can easily adjust the installation space between the main body 10 and the support base 30.

9 and 10, the ink supply unit 80 according to the third embodiment of the present invention is configured such that the ink supply unit 80 is disposed inside the groove 12 of the main body 10 at a predetermined interval A plurality of nozzles 90 connected to the ink supply pipe 82 and the washing water for storing the washing water for washing the groove 12 and the roller 2 are stored and stored in the ink supply pipe 82 A washing tub 91 which is installed so as to be pressed and fed by a nozzle 90 and a part of washing water which is branched from the ink supply pipe 82 and is fed through the pump 84, It is also possible to further include a bypass pipe 92.

The nozzle 90 can be installed in the ink outlet 83.

The nozzle 90 ejects washing water toward the roller 2.

The washing wastewater which has been jetted by the nozzle 90 and rinsed the inner surfaces of the roller 2 and the groove 12 is recovered in the same path as the ink.

A bypass valve (93) is installed in the bypass pipe (92).

The bypass valve 93 is provided to set the transfer amount or the transfer pressure between the case where the ink is transferred through the ink supply pipe 82 and the case where the wash water is transferred.

The ink application device for a printer according to an embodiment of the present invention configured as described above can be implemented by an ink application device such as a rotary type flexographic printer, a rotary offset printer, or a rotary gravure printer.

2: roller 3: support frame
10: Main body 12: Groove
13: distribution passage 14: ink outlet
15: projection 16: ink outlet
20: ink scratch 21: ink pool
24: auxiliary scraper 30: support
35: support groove 40: joint
41: connecting shaft 42: ball portion
43: connecting arm 44: groove portion
46: bed 48: fixing bolt
49: gauge projection 50: air bag
60: elastic member 70: rotation guide
80: Ink supply part 81:
82: ink supply pipe 84: pump
86: Ink recovery unit 90: Nozzle
91: wash water bottle 92: bypass pipe
93: Bypass valve

Claims (12)

A main body having a front portion formed with a groove,
An ink scraper fixed to the main body and scraped off the over-applied ink as the ink is applied to the roller near the front side of the groove,
A support for supporting the main body from the rear of the main body,
A plurality of joints rotatably connecting an upper portion of the main body and a support,
And an airbag installed between the main body and the support and pushing the main body from the support so that the tip of the ink scraper comes into contact with the roller at a certain pressure while expanding as the gas is injected into the main body. The method according to claim 1,
Wherein an inner surface of the groove portion of the main body is coated with a surfactant resin. The method according to claim 1,
Wherein the ink scraping device is provided so as to form an ink sump in which ink can be accumulated together with the groove portion and the roller as the leading end contacts with the roller at a constant pressure. The method according to claim 1,
Wherein the joint is rotatably connected to the main body and the support base by hinge engagement using a spherical surface treatment. The method according to claim 1 or 4,
The joint is fixed to the upper portion of the main body and has a spherical ball portion formed at an end portion thereof. The joint shaft has a connecting shaft fixed to one side of the supporting base and slidable in spherical contact with the ball portion of the connecting shaft, And a connection arm having a hinge groove formed to be engaged with the connection arm. The method of claim 5,
Wherein the joint comprises a bed fixed to the support and having a guide groove formed therein for assembling the connection arm so as to be movable forward and backward and having a gauge jaw formed at its tip, a fixing bolt for fixing the connection arm to the bed, And a gauge protrusion installed at one side of the bed and screwed to the bed, the gauge protrusion restricting the forward movement of the bed while the leading end is caught in the gauge jaw. The method according to claim 1,
Wherein the airbag has a rod shape upon expansion. The method according to claim 1,
And an elastic member for applying a pulling force to the main body toward the support base. The method according to claim 1,
Further comprising an auxiliary scraper which is formed in a vertically symmetrical manner with the ink scratch and blocks the gap between the groove and the roller at an upper portion of the main body. The method according to claim 1,
And an ink supply unit for supplying ink to the groove of the main body. The method of claim 10,
Wherein the ink supply unit comprises: an ink tank in which ink is stored; an ink supply pipe forming a passage for transferring the ink of the ink tank to the groove of the main body; a pump for feeding the ink to the groove through the ink supply pipe; And an ink recovery table for receiving the ink and recovering the ink into the ink reservoir. The method of claim 11,
The main body further includes a distribution passage for uniformly distributing the ink supplied through the ink supply pipe to the entirety of the groove,
Wherein the ink supply unit includes a plurality of nozzles disposed inside the groove of the main body at predetermined intervals along the longitudinal direction and connected to the distribution passage, and wash water stored and stored in the wash water is supplied to the nozzle through the ink supply pipe, Further comprising a bypass pipe for bypassing a part of the washing water branched from the ink supply pipe and being fed through the pump to the wash water bottle.

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