WO2015143919A1

WO2015143919A1 - Waste liquid circulation plate wiping apparatus and implementation method therefor

Info

Publication number: WO2015143919A1
Application number: PCT/CN2015/000080
Authority: WO
Inventors: 栾建宁; 马立项; 章小进; 张强勇; 高卫; 吴金平; 曹光辉; 郑云建
Original assignee: 南京造币有限公司; 中国印钞造币总公司
Priority date: 2014-03-28
Filing date: 2015-02-05
Publication date: 2015-10-01
Also published as: CN104943360A; EP3040203A1; EP3040203A4; JP6134013B2; CN104943360B; JP2016531015A; EP3040203B1

Abstract

A waste liquid circulation plate wiping apparatus and an implementation method therefor. The device comprises a plate wiping roller (7), at least one piece of cleaning substrate (6), two spray nozzles (5a, 5b), i.e. a front spray nozzle and a rear spray nozzle, a water retaining device (2), a new-old liquid separation device (3), a waste liquid circulation device, a liquid level detection device (11), a new plate wiping liquid back flush device and a soft water back flush device. The device and method achieve the purposes of saving water and reducing energy in a manner of "separation - collection - circulation - reuse", thereby having relatively high social and economic benefits.

Description

Waste liquid circulation wiping device and implementation method thereof

Technical field

The invention relates to an engraved gravure wiper device, in particular to a waste liquid circulation wiping device and a method for implementing the same.

Background technique

The existing wiping device for the engraving gravure printing machine for securities and banknote security printing mainly has the following two methods: 1. Dry rubbing method, that is, using cotton cloth or paper to wipe the waste ink on the surface of the wiping roller. This method consumes a lot of cotton or paper and is costly. 2. The water washing method, that is, the waste ink is carried away with the cleaning liquid flow through a suitable cleaning liquid and further cleaning members. This method not only pollutes the environment, but also increases the cost of water treatment, which greatly wastes valuable water resources. At present, the domestic and international mainstream gravure printing machine wiping system generally adopts the water washing method, which consumes energy and water for the washing method, and the later waste liquid treatment is more expensive, causing certain pollution to the environment, which has been plagued by the problem of engraving gravure printing. In today's technical situation, it is technically impossible to eliminate the gravure "water washing method", to minimize the water consumption caused by the wiping process, to reduce the waste of water resources and the post-processing burden has become a research topic in the engraving gravure printing industry. .

The common domestic engraving gravure printing machine wiping system adopts a spray-type wiping structure, and uses seven groups of cleaning liquids, four sets of brushes and two sets of scrapers to emulsify, erase and clean the ink on the surface of the wiping roll. In this structure, the pressure between the two sets of scraper and the wiping roller is difficult to control, and it is easy to damage the wiping roller, which has an effect on the wiping effect. In addition, the consumption of the cleaning liquid is compared by using seven sets of cleaning liquids. Large, an average of 1-1.2 tons per hour, puts a burden on the later water treatment, water consumption and energy consumption.

A company's new wiring gravure printing machine uses a combination of scouring pad pre-wiping and spray cleaning to clean the substrate, using a whole piece of scouring pad to clean the substrate, increasing the wrap angle and area, two way A separate new rubbing solution is supplied to the front and rear nozzles respectively to complete the emulsification, wiping and cleaning of the ink adhering to the wiping roll. The set of wiping system is simple, and the water consumption is significantly reduced compared with the previous spray wiping system. The average consumption of the new rubbing solution per hour is about 0.6-0.8 tons.

In the "washing" wiping device of the different types of engraving gravure printing machines previously seen, in order to ensure the quality of the printed products, the consumption of the wiping solution is generally large. In the literature on engraving gravure printing machines currently inspected, there is no relevant report that the washed laminating liquid can be recycled again.

Summary of the invention

The object of the present invention is to overcome the shortcomings of the prior art, and to provide a technical problem of water consumption and energy consumption in the above-mentioned water washing method, and to provide an engraved gravure printing device, which is capable of mixing a dirty rubbing solution after pre-wiping. After the cleaning, the clean washing liquid is effectively separated, and the clean cleaning liquid is collected, repeatedly recycled, and further used to achieve the water-saving and reducing consumption of a waste liquid rub-off device and an implementation method thereof.

The technical solution for achieving the object of the present invention is: a waste liquid circulation wiping device, comprising a stencil roll, at least one cleaning substrate, two front and rear nozzles, a water retaining device, a new and old liquid separating device, a waste liquid circulating device, and a liquid level a detecting device, a new rubbing backwashing device and a soft water backwashing device, wherein the left side of the erasing roller is provided with a front-end waste liquid circulation nozzle, and the bottom of the erasing roller is provided with a middle cleaning nozzle, which is located at the wiping roller a cleaning substrate on the outer circumferential surface, the cleaning substrate being mounted on the mesh plate Upper, the water retaining device, the new and old liquid separating device are respectively connected to the mesh plate, the middle nozzle is connected to the mesh plate, the new rubbing liquid is communicated with the middle nozzle through the cleaning pipe, and the middle nozzle sprays the wiping plate The liquid is connected to the waste liquid tank through the water retaining device and the new and old liquid separating device, and the rubbing liquid in the waste liquid tank communicates with the front nozzle through the waste liquid circulating device, and the waste liquid circulating device passes through the water filling pipe and the new rubbing device The liquid discharging device is connected, the waste liquid circulating device and the cleaning device are respectively connected with a new rubbing liquid backwashing device and a soft water backwashing device;

A. When the wiping device is locked and the vehicle is locked, the solenoid valve in the water supply pipeline is opened, and the new rubbing liquid enters the collecting box. When the liquid level reaches the ultrasonic detecting set liquid level, the triggering solenoid valve is closed;

B. When the main engine is turned on, the circulation pump in the waste liquid circulation line is turned on, and the liquid in the collection box is transported to the front nozzle, sprayed onto the surface of the wiping roller, and the ink on the surface is emulsified; The solenoid valve is opened, and the new rubbing liquid enters the middle nozzle of the cleaning pipeline to clean the wiping roller;

C. After the emulsified ink is wiped by the cleaning substrate, the mixed liquid of the ink and the rubbing liquid is blocked by the water retaining rubber strip, and flows into the waste liquid funnel through the mesh plate and the outer plate of the water retaining plate;

D. CD section cleaning The cleaning roller liquid produced by the cleaning roller is blocked by the water retaining rubber strip, and is collected by the mesh plate and the inner plate of the water baffle into the collecting box, and then reused to the front nozzle by the circulating pump. Circulating and emulsifying the ink on the surface of the wiping roll;

E. The washed washing liquid of the CD section in the waste liquid tank will contain fine ink particles. The long-term recovery will lead to the continuous increase of the ink particle concentration in the waste liquid tank, which may lead to the cleaning pipeline and the waste liquid circulation pipeline. The nozzle in the block is clogged.

The above-mentioned method for implementing a waste liquid circulation wiping device, in step E, in order to ensure collection The ink concentration in the tank is not too high, the ball valve is in a half-open state, and the roller liquid is partially discharged.

In the above-mentioned implementation method of the waste liquid circulation wiping device, when the amount of the washing liquid circulating and discharging the waste liquid is larger than the recovery amount of the washing liquid from the CD section, the liquid level in the tank will decrease, and when it is lowered to the ultrasonic detecting When the liquid level is set, the solenoid valve in the water supply pipeline is triggered to open, and the new rubbing liquid flows into the collecting box, diluting the concentration of the washing roller liquid in the original tank, and ensuring the smooth circulation of the circulating pipeline.

The method for implementing the waste liquid circulation wiping device described above further comprises the step F, after the wiping system is operated to the set running time, the backwashing electromagnetic valve is opened, because the pressure of the new rubbing liquid provided in the background is much higher than The output pressure of the circulating pump, the one-way shut-off valve in the waste liquid circulation line is closed, and the new rubbing liquid with a large pressure directly enters the nozzle, and the pipeline and the nozzle are cleaned, and the cleaning time can be set.

The method for implementing the waste liquid circulation wiping device described above further includes the step G. When the wiping system stops working, the soft water solenoid valve is opened, and the soft water rinses the front and rear nozzles again.

In the above method for implementing a waste liquid circulation wiping device, the circulation pump of the waste liquid circulation device drives the impeller by a one-way motor, and the impeller sucks the mixed rubbing liquid, and the liquid passes through the reduced diameter cavity to form a pressure difference. Transfer to the front nozzle.

In the above method for implementing a waste liquid circulation wiping device, the liquid level detecting device is provided with an ultrasonic liquid level for automatically detecting the level of the liquid level in the collection box, and the circulation pump is ensured by the water supply system. The liquid level is continuously recycled.

After adopting the above technical solution, the present invention has the following positive effects:

(1) The engraved gravure printing apparatus according to the present invention proposes a novel type by means of "separation-collection-cycle-reuse" on the basis of the wiping system combined with pre-wiping and spray cleaning. Waste liquid circulation wiping device. Each set of wiping device includes at least one cleaning substrate, two nozzles, a water retaining device, a new and old liquid separating device, a waste liquid circulation device, a liquid level detecting water supply device, and a new rubbing liquid backwashing device. The device is equipped with a set of soft water backwashing devices.

(2) The device of the invention has been used in the large-scale production of gravure printing, and the system is stable and reliable through the printing of 10 million printed products. It is confirmed by test data that the water consumption of the waste circulation erasing system is stable at 0.2 per hour. About ton, compared with the previous "water washing method" wiping system to save water 60-70%, to achieve the purpose of water saving, with high social and economic benefits.

DRAWINGS

In order to make the content of the present invention more easily understood, the present invention will be further described in detail below with reference to the accompanying drawings

Figure 1 is a schematic view of the structure of the present invention.

detailed description

(Example 1)

As shown in Fig. 1, a waste liquid circulation wiping device comprises a wiping roller 7, at least one cleaning substrate 6, two front and rear nozzles, a water blocking device, a new and old liquid separating device, a waste liquid circulating device, and a liquid level detecting. The device, the new rubbing backwashing device and the soft water backwashing device, the left side of the wiping roller 7 is provided with a front nozzle 5a, and the bottom of the wiping roller is provided with a middle cleaning nozzle 5b, which is located at the wiping roller 7 The outer circumferential surface has a cleaning substrate 6 mounted on the mesh plate 4, and the water retaining device 2 and the new and old liquid separating device 3 are respectively connected to the mesh plate, and the middle nozzle 5b and the mesh plate 4 are respectively Connected, the new rubbing liquid communicates with the middle nozzle through the washing pipeline, and the middle nozzle sprays The wiping liquid is connected to the waste liquid tank 13 through the water retaining device and the new and old liquid separating device, and the wiping liquid in the waste liquid tank communicates with the front nozzle through the waste liquid circulating device, and the waste liquid circulating device passes through the water replenishing pipeline Connected to the new rubbing liquid device, the waste liquid circulating device and the cleaning device are respectively connected to the new rubbing backwashing device and the soft water backwashing device.

When the wiping device is locked and the vehicle is locked, the solenoid valve 9a in the water supply line is opened, and the new rubbing liquid enters the collecting box 13. When the liquid level reaches the setting level of the ultrasonic detecting 11, the triggering solenoid valve 9a is closed. . When the main engine is turned on, the circulation pump in the waste liquid circulation line is turned on, and the liquid in the collection tank is sent to the front nozzle 5a, sprayed onto the surface of the wiping roller, and the ink on the surface is emulsified. At the same time, the solenoid valve 9b in the cleaning pipeline is opened, and the new wiping liquid enters the cleaning nozzle middle nozzle 5b to clean the wiping roller. After the emulsified ink is wiped by the cleaning substrate 6, the mixed liquid of the ink and the rubbing liquid is blocked by the water retaining strip 3, and flows into the waste hopper 14 through the mesh plate 4 and the outer plate of the water retaining plate 2. The cleaner washing liquid generated by the CD segment cleaning wiper roller is blocked by the water retaining rubber strip 3, and is collected by the mesh plate 4 and the inner plate of the water retaining plate 2 into the collecting box 13, and then reused by the circulation pump 12 to On the front nozzle 5a, the ink on the surface of the wiping roll is subjected to cyclic emulsification. The washed washing liquid of the CD section in the waste liquid tank contains fine ink particles. The long-term recovery will cause the concentration of the ink particles to rise continuously in the waste liquid tank. If it is recycled to the front nozzle 5a, it is easy to recycle. Causes clogging of the nozzle. In order to ensure that the ink concentration in the collection tank is not too high, the ball valve 10 is in a half-open state, and the roller liquid is partially discharged. When the amount of the washing liquid circulating and discharging is larger than the recovery amount of the washing liquid from the CD section, the liquid level in the tank will decrease, and when it drops to the setting level of the ultrasonic detecting 11, the electromagnetic in the water supply line is triggered. The valve 9a is opened, and the new rubbing solution flows into the collecting box, diluting the concentration of the washing roller liquid in the original box, and ensuring the circulation line. Unblocked. After the system is operated for a long time, the recycled roller liquid containing a small amount of ink will form a small amount of ink accumulation on the circulation line or the nozzle 5a, which will affect the normal operation of the nozzle. The system adds a new rubbing liquid backwashing function. When the wiping system works to the set running time, the backwashing solenoid valve 9c is opened, because the pressure of the new rubbing liquid provided in the background is much higher than the output pressure of the circulating pump 12, The one-way shut-off valve 1 in the waste liquid circulation line is closed, and the new rubbing liquid of a large pressure directly enters the nozzle 5a, and the pipeline and the nozzle are cleaned, and the cleaning time can be set. The automatic control of the backwash ensures the uninterrupted operation of the wiping system and the smooth circulation system. Since the rubbing solution is a weakly alkaline mixed liquid, when the machine is stopped for a long time, the rubbing solution condensed on the two

nozzles

5a, 5b will crystallize, and the nozzle will be blocked for a long time. Therefore, when the wiping system stops working, the soft water solenoid valve 9d is opened, and the soft water rinses the front and rear nozzles again.

The core component of the waste liquid circulation pump 12 must be adapted to corrosion resistance, mixed ink particles containing tiny ink particles and 40 degrees temperature, and the working environment is poor. In order to meet the liquid transportation and avoid the blockage of the circulation pump, the circulation pump 12 is unidirectional. The motor drives the impeller, the impeller sucks the mixed rubbing liquid, and the liquid passes through the variable diameter cavity to form a pressure difference, and is sent to the front nozzle 5a through the pipeline.

The liquid level detecting device is provided with an ultrasonic liquid level 11 for automatically detecting the level of the liquid level in the collecting box, and the circulating water pump is continuously circulated and used at a suitable liquid level through the water replenishing system.

The specific embodiments of the present invention have been described in detail, and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A waste liquid circulation wiping device, comprising: a stencil roll, at least one cleaning substrate, two front and rear nozzles, a water retaining device, a new and old liquid separating device, a waste liquid circulating device, a liquid level detecting device, and a new rubbing a plate backwashing device and a soft water backwashing device, wherein the left side of the erasing roller is provided with a front-end waste liquid circulation nozzle, and the bottom of the erasing roller is provided with a middle-path cleaning nozzle on the outer circumferential surface of the erasing roller Having a cleaning substrate, the cleaning substrate is mounted on the mesh plate, the water blocking device, the new and old liquid separating device are respectively connected to the mesh plate, the middle nozzle is connected to the mesh plate, and the new rubbing liquid is cleaned The pipeline communicates with the central nozzle, and the wiping liquid sprayed by the middle nozzle communicates with the waste liquid tank through the water retaining device and the new and old liquid separating device, and the rubbing liquid in the waste liquid tank passes through the waste liquid circulating device and the front nozzle In addition, the waste liquid circulation device is connected to the new rubbing liquid device through a water supply pipe, and the waste liquid circulation device and the cleaning device are respectively connected with a new rubbing liquid backwashing device and a soft water backwashing device;
The method for implementing a waste liquid circulation wiping device according to claim 1, wherein: A, the wiping device is locked with the main body, and the electromagnetic valve in the water supply line is opened when the vehicle is engaged, the new rubbing liquid Entering the collection box, when the liquid level reaches the ultrasonic detection setting liquid level, the trigger solenoid valve is closed;

B. When the main engine is turned on, the circulation pump in the waste liquid circulation line is turned on, and the liquid in the collection box is transported to the front nozzle, sprayed onto the surface of the wiping roller, and the ink on the surface is emulsified; The solenoid valve is opened, and the new rubbing liquid enters the middle nozzle of the cleaning pipeline to clean the wiping roller;

C. After the emulsified ink is wiped by the cleaning substrate, the mixture of the ink and the squeegee solution is produced by The water retaining strip is blocked, and flows into the waste funnel through the mesh plate and the outer plate of the water baffle;

D. CD section cleaning The cleaning roller liquid produced by the cleaning roller is blocked by the water retaining rubber strip, and is collected by the mesh plate and the inner plate of the water baffle into the collecting box, and then reused to the front nozzle by the circulating pump. Circulating and emulsifying the ink on the surface of the wiping roll;

E. The washed washing liquid of the CD section in the waste liquid tank will contain fine ink particles. The long-term recovery will lead to the continuous increase of the ink particle concentration in the waste liquid tank, which may lead to the cleaning pipeline and the waste liquid circulation pipeline. The nozzle in the block is clogged.
The method for implementing a waste liquid circulation wiping device according to claim 2, wherein in the step E, in order to ensure that the liquid ink concentration in the collection box is not too high, the ball valve is in a half-open state, and the roller liquid is Partially discharged.
The method for implementing a waste liquid circulation wiping device according to claim 3, characterized in that: when the amount of the washing liquid circulating and discharging the waste liquid is larger than the amount of the washing liquid from the CD section, the liquid in the tank The position will drop. When it drops to the ultrasonic detection setting liquid level, the solenoid valve in the triggering water supply line is opened, and the new rubbing liquid flows into the collecting box, diluting the concentration of the washing roller liquid in the original box to ensure the circulation. The pipe is unblocked.
The method for implementing a waste liquid circulation wiping device according to claim 3, further comprising the step F, after the wiping system is operated to the set running time, the backwashing electromagnetic valve is opened, due to the background providing The pressure of the new rubbing solution is much higher than the output pressure of the circulating pump, and the one-way shut-off valve in the waste liquid circulation line is closed, and the new rubbing liquid with a large pressure directly enters the nozzle to clean the pipeline and the nozzle, and the cleaning time Can be set.
A method of implementing a waste liquid circulation wiping device according to claim 5, characterized in that It is: It also includes step G. When the wiping system stops working, the soft water solenoid valve is opened, and the soft water rinses the front and rear nozzles again.
The method for implementing a waste liquid circulation wiping device according to claim 6, wherein the circulation pump of the waste liquid circulation device drives the impeller by a one-way motor, and the impeller sucks the mixed rubbing liquid, and the liquid passes through The reduced diameter cavity is formed into a differential pressure to the front nozzle.
The method for implementing a waste liquid circulation wiping device according to claim 7, wherein the liquid level detecting device is provided with an ultrasonic liquid level for automatically detecting the level of the liquid level in the collecting box. The circulatory system ensures that the circulating pump is continuously cycled at the appropriate level.