CN108274893B

CN108274893B - Printing method for removing solidified ink

Info

Publication number: CN108274893B
Application number: CN201810097939.2A
Authority: CN
Inventors: 吴仁本
Original assignee: Chongqing Huakang Printing Co ltd
Current assignee: Chongqing Huakang Printing Co ltd
Priority date: 2018-01-31
Filing date: 2018-01-31
Publication date: 2020-04-21
Anticipated expiration: 2038-01-31
Also published as: CN108274893A

Abstract

The invention belongs to a special method for printing by ink, and particularly discloses a printing method for removing solidified ink, which comprises the following steps: step 1: preparing a scraper and a spray head, and preparing the following ink cleaning agent ingredients, 40-50 parts of ethylene glycol ethyl ether, 10-15 parts of dipropylene glycol methyl ether, 5-10 parts of ethylene glycol ethyl ether and 30-40 parts of water; step 2: mixing the ink cleaning agent ingredients prepared in the step 1 to obtain an ink cleaning agent; and step 3: fixing the scraper in front of the ink supply roller, so that the printing roller is firstly contacted with the scraper and then is coated with ink; and 4, step 4: and starting the printing roller, and then starting the spray nozzle to spray the ink cleaning agent to the surface of the printing roller, so that the ink cleaning agent is sprayed by the spray nozzle before the printing roller is contacted with the scraper. The invention aims to solve the problem that the prior art cannot remove solidified ink attached to a printing roller.

Description

Printing method for removing solidified ink

Technical Field

The invention belongs to a special method for printing by using ink, and particularly discloses a printing method for removing solidified ink.

Background

The printing technology is closely related to the daily life of people, and characters or patterns printed by the printing technology are arranged on various books, newspapers, magazines and various textiles which are used daily.

The existing printing technology is that ink in an ink tank is coated on a printing roller through an ink supply roller, then the ink is printed on a printed object such as paper through the printing roller, and after the printing roller is coated with the ink, the ink on the surface of the printing roller needs to be leveled up before the printing roller prints the ink on the paper, so that poor printing effect caused by uneven distribution of the ink attached to the surface of the printing roller is avoided.

Through the process of leveling the ink on the printing roller, although the ink on the surface of the printing roller is uniformly distributed, when the printing roller is contacted with paper, the printing roller imprints the ink on the paper, and the paper cannot completely absorb all the ink, so a small amount of ink is remained on the printing roller, and in the ink, because a large amount of solvent is absorbed by the paper, the remained colored particles are quickly solidified on the surface of the printing roller to form solids attached to the surface of the printing roller, and the solids cause the surface of the printing roller to be incapable of being kept flat, and the solidified ink cannot be eliminated by the existing leveling process, so that the printing quality is reduced.

Disclosure of Invention

The invention discloses a printing method for removing solidified ink, and aims to solve the problem that the solidified ink attached to a printing roller cannot be removed in the prior art.

The basic scheme of the invention is as follows: a printing method of removing solidified ink comprising the steps of:

step 1: preparing a scraper and a spray head, and preparing the following ink cleaning agent ingredients, 40-50 parts of ethylene glycol ether, 10-15 parts of dipropylene glycol methyl ether, 5-10 parts of diethylene glycol ethyl ether and 30-40 parts of water;

step 2: mixing the ink cleaning agent ingredients prepared in the step 1 to obtain an ink cleaning agent;

and step 3: fixing the scraper in front of the ink supply roller, so that the printing roller is firstly contacted with the scraper and then is coated with ink;

and 4, step 4: and starting the printing roller, and then starting the spray nozzle to spray the ink cleaning agent to the surface of the printing roller, so that the ink cleaning agent is sprayed by the spray nozzle before the printing roller is contacted with the scraper.

The technical principle and the beneficial effects of the invention are as follows:

1. in the step 1 of the invention, the glycol ether is added into the ink cleaning agent as a solvent, and the dipropylene glycol methyl ether and the diethylene glycol ethyl ether are used as auxiliary solvents, so that the ink is dissolved in the ink cleaning agent under the infiltration of the ink cleaning agent, and the solidified ink is prevented from being firmly attached to the surface of the printing roller and being difficult to eradicate.

2. In the step 3 of the invention, the scraper is fixed in front of the ink supply roller, so that the printing roller is firstly contacted with the scraper after printing the ink coated last time on the paper, the scraper scrapes the residual ink on the surface of the printing roller, and then the new ink is coated again, thereby ensuring that the surface of the printing roller has no residual ink when the new ink is coated, and further ensuring that the new ink is kept flat and uniform when being coated.

3. In the step 4 of the invention, the ink cleaning agent is sprayed on the surface of the printing roller before the printing roller is contacted with the scraper, so that the solidified ink remained on the surface of the printing roller is firstly dissolved into a liquid state by the ink cleaning agent, thereby avoiding the problems that the solidified ink is firmly adhered to the printing roller and the scraper is difficult to scrape.

Furthermore, the pressure intensity is 0.3-0.4 Mpa when the nozzle ejects the ink cleaning agent. Through the design, when the nozzle sprays the ink cleaning agent, the ink cleaning agent has certain initial speed, so that the ink cleaning agent can be smoothly sprayed onto the surface of the printing roller.

Furthermore, the pretightening force between the scraper and the printing roller is 0.1-0.3 times of the gravity of the scraper. Make through above-mentioned design support tightly between scraper blade and the printing roller to it is better to make the scraper blade strike off the effect of remaining ink.

Furthermore, the flow rate of the spray head is 0.4-0.6 m ^ 3/h. Through the design, the amount of the ink cleaning agent sprayed by the spray head is not excessive to cause waste.

Further, the ink cleaner ingredients were mixed with stirring at 50 ℃. Through the design, the ink cleaning agent is mixed faster during stirring and mixing.

Drawings

FIG. 1 is a schematic view of the overall structure of an ink removing apparatus according to an embodiment of the present invention;

FIG. 2 is a front partial sectional view of an ink removal blade in an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is an enlarged schematic structural diagram of a cylinder in the ink removing apparatus according to the embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the printing roller comprises a printing roller 1, an ink removing knife 2, a baffle 3, a support frame 4, a cleaning roller 5, a sponge layer 6, a transmission cavity 7, a first bevel gear 8, a second bevel gear 9, a second rotating shaft 10, a third rotating shaft 11, a driving wheel 12, a cylinder barrel 13, a liquid storage tank 14, a backflow hole 15, a transverse plate 16, a vertical plate 17, a liquid conveying pipe 18, a liquid inlet 19, a spraying hole 20, a cover plate 21, a first belt wheel 22, a first rotating shaft 23, a belt 24, a second belt wheel 25 and a cavity 26.

The embodiment is basically as shown in figures 1 to 5: a printing method of removing solidified ink comprising the steps of:

step 1: preparing an ink removing device which comprises an ink removing knife 2, wherein the left end of the ink removing knife 2 is provided with a wedge surface, the lower edge of the wedge surface is abutted against a printing roller 1, a cavity 26 is formed in the ink removing knife 2, a liquid storage tank 14 is fixedly arranged in the cavity 26, the liquid storage tank 14 is formed by welding a transverse plate 16 and a vertical plate 17 with the inner wall of the cavity 26, the transverse plate 16 is vertical to the vertical plate 17, the right end of the transverse plate 16 is welded with the upper end of the vertical plate 17, the side wall of the liquid storage tank 14 is provided with a liquid inlet 19, a switch valve is arranged in the liquid inlet 19, a spraying cavity is formed in the wedge surface above the transverse plate 16, one side of the spraying cavity, far away from the cavity 26, is provided with a spraying hole 20, the flow of the spraying hole 20 is 0.5m 3/h, the injection pressure is 0.35Mpa, a backflow hole 15 is formed in the wedge surface below the transverse plate 16, the backflow hole 15 is communicated with the liquid storage tank 14, the side walls on both sides of, the return port 15 is close to liquid reserve tank 14 one side and installs apron 21, apron 21 has the extension spring near the one side welding of return port 15, the extension spring other end and the welding of return port 15 lateral wall, 14 right side wall of liquid reserve tank is connected with transfer line 18, the transfer line 18 other end with spray the chamber intercommunication, transfer line 18 and spray chamber intercommunication department fixed mounting have the check valve that only allows liquid to flow out

transfer line

18, 14 and 18 junction fixed mounting of transfer line have the check valve that only allows liquid to flow in transfer line 18 from liquid reserve tank 14, integrated into one piece has cylinder 13 on the 18 right side wall of transfer line, cylinder 13 and transfer line 18 intercommunication, cylinder 13 right-hand member is unsealed, sliding seal has the piston board in cylinder 13, the piston board right-hand member.

The lower end surface of the ink knife 2 is fixedly provided with a left support frame 4 and a right support frame 4, a cleaning roller 5 is rotatably connected between the left support frame 4 and the right support frame 4, the left side wall of the cleaning roller 5 is contacted with the printing roller 1, the surface of the cleaning roller 5 is fixedly provided with a sponge layer 6, a transmission cavity 7 is arranged in the right support frame 4, the cleaning roller 5 is coaxially and fixedly connected with a first rotating shaft 23, two ends of the first rotating shaft 23 are rotatably connected with the support frames 4, the right end of the first rotating shaft 23 extends into the transmission cavity 7 and is fixedly connected with a first belt pulley 22, the transmission cavity 7 is also rotatably connected with a second rotating shaft 10, two ends of the second rotating shaft 10 are rotatably connected with the side wall of the transmission cavity 7 and are parallel to the first rotating shaft 23, the second rotating shaft 10 is coaxially and fixedly connected with a second belt pulley 25 and a first bevel gear 8, the first belt pulley 22 and the second belt pulley 25 are provided with, the upper end of the second bevel gear 9 is fixedly connected with a third rotating shaft 11, the third rotating shaft 11 extends into the cavity 26 and is rotatably connected with the lower wall of the cavity 26, the upper end of the third rotating shaft 11 is fixedly connected with a driving wheel 12, the upper end face of the driving wheel 12 is eccentrically hinged with a connecting rod, the other end of the connecting rod is hinged with a piston rod, the connecting rod is longer than the piston rod, and the hinged point of the connecting rod and the piston rod is always positioned in the cylinder.

Preparing the following ink cleaning agent ingredients, 4.5kg of ethylene glycol ethyl ether, 1.25kg of dipropylene glycol methyl ether, 0.75kg of diethylene glycol ethyl ether and 3.5kg of water;

step 2: mixing the ink cleaning agent ingredients prepared in the step 1 at 50 ℃ to obtain an ink cleaning agent;

and step 3: the ink removing knife 2 is fixed on the right side wall of the printing roller, the lower edge of the wedge surface is abutted against the right side wall of the printing roller 1, and the pretightening force between the ink removing knife 2 and the printing roller 1 is 0.15 times of the gravity of the ink removing knife.

And 4, step 4: the printing roller 1 is started and printing is started, the rotation of the printing roller 1 drives the cleaning roller 5 to rotate together, so that the cleaning roller 5 drives the first rotating shaft 23 and the first belt wheel 22 to rotate, the first belt wheel 22 drives the second belt wheel 25 and the second rotating shaft 10 to rotate through the belt 24, the second rotating shaft 10 further drives the first bevel gear 8 to rotate, the first bevel gear 8 drives the second bevel gear 9 to rotate, the second bevel gear 9 further drives the third rotating shaft 11 and the driving wheel 12 to rotate, so that the connecting rod drives the piston rod and the piston plate to reciprocate in the cylinder 13, when the piston rod moves towards the direction far away from the liquid conveying pipe 18, a pressure difference is generated between the liquid conveying pipe 18 and the liquid storage tank 14, and because the connecting part of the liquid storage tank 14 and the liquid conveying pipe 18 and the communicating part of the liquid conveying pipe 18 and the spraying cavity are both provided with one-way valves, the ink cleaning agent in the liquid storage tank 14 flows from the liquid storage tank 14 to the, when the piston plate moves towards the direction close to the infusion tube 18, the liquid in the infusion tube 18 is pushed towards the spraying cavity under the action of the one-way valve and the pressure difference, so that the ink cleaning agent enters the spraying cavity and is finally sprayed to the printing roller 1 from the spraying hole 20, and the ink cleaning agent is sprayed on the printing roller 1 and then infiltrates the residual ink on the printing roller, so that the residual ink is dissolved.

Along with the continuous rotation of the printing roller 1, the ink cleaning agent and the dissolved ink are scraped by the wedge surface and stay in the space defined by the baffle 3, the wedge surface and the printing roller 1, along with the continuous rotation of the printing roller 1, the liquid reserved in the space defined by the baffle 3, the wedge surface and the printing roller 1 is continuously increased, when the liquid level reserved in the space defined by the baffle 3, the wedge surface and the printing roller 1 is higher than the liquid level in the liquid storage tank 14, the pressure intensity of one surface of the cover plate 21 close to the backflow hole 15 is larger than that of one surface of the cover plate 21 far away from the backflow hole 15, so that the cover plate 21 is driven to overcome the tension of the tension spring to open the backflow hole 15, the ink cleaning agent in the space defined by the baffle 3, the wedge surface and the printing roller 1 flows into the liquid storage tank 14, and the excessive liquid stored in the space defined by the baffle 3, the wedge surface and the printing roller 1 is avoided, meanwhile, the cyclic utilization of the ink cleaning agent is realized.

Along with the rotation of the printing roller 1, after the printing roller 1 passes through the wedge surface, the printing roller 1 is contacted with the cleaning roller 5, and a small amount of residual ink cleaning agent on the surface of the printing roller 1 is absorbed completely under the action of the sponge layer 6 on the surface of the cleaning roller 5.

When the ink dissolved in the ink cleaning agent in the liquid storage tank 14 reaches a saturated state, the switch valve of the liquid inlet 19 is opened to discharge the ink cleaning agent in the liquid storage tank 14, and then new ink cleaning agent is introduced to complete the replacement of the ink cleaning agent.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. A printing method of removing solidified ink, comprising the steps of:

step 1: preparing a scraper plate and a spray head, and preparing the following ink cleaning agent ingredients, 40-50 parts of ethylene glycol ethyl ether, 10-15 parts of dipropylene glycol methyl ether, 5-10 parts of diethylene glycol ethyl ether and 30-40 parts of water;

and 4, step 4: the ink removing equipment comprises an ink removing knife, a wedge surface is arranged at the left end of the ink removing knife, the lower edge of the wedge surface abuts against the printing roller, a cavity is formed in the ink removing knife, a liquid storage tank is fixedly installed in the cavity, the liquid storage tank is enclosed by a transverse plate, a vertical plate and the inner wall of the cavity, and a backflow hole is formed in the wedge surface below the transverse plate; and starting the printing roller, and then starting the spray nozzle to spray the ink cleaning agent to the surface of the printing roller, so that the ink cleaning agent is sprayed by the spray nozzle before the printing roller is contacted with the scraper.

2. A printing method of removing solidified ink according to claim 1, wherein: the pressure intensity is 0.3-0.4 Mpa when the nozzle ejects the ink cleaning agent.

3. A printing method of removing solidified ink according to claim 2, wherein: the pretightening force between the scraper and the printing roller is 0.1-0.3 times of the gravity of the scraper.

4. A printing method of removing solidified ink according to claim 3, wherein: the flow rate of the spray head is 0.4-0.6 m ^ 3/h.

5. A printing method of removing solidified ink according to claim 4, wherein: the ink cleaner ingredients were mixed with stirring at 50 ℃.