Anti-drying monitoring alarm device for ink fountain of gravure press

Abstract

The utility model provides an anti-drying monitoring alarm device for an ink fountain of a gravure press, and relates to the technical field of printing. According to the ink fountain, different levels of liquid level detection and reminding alarm devices are arranged on a traditional ink fountain (1), and corresponding reminding information is automatically sent out according to the liquid level of ink in the ink fountain (1); besides, a printing ink consumption speed detection device is arranged in the ink supply mechanism, a relatively stable and high-precision environment is provided, and after data are detected, the printing ink consumption speed of the whole printing unit can be obtained according to a proportional relation, so that the usable time of the printing ink is calculated, and a precise time point is provided for subsequent ink supplement; the gravure press is based on the printing units in the gravure press and can adapt to multi-color-group printing, each printing unit can prepare ink supply according to the printing working condition of the printing unit, and the problem that management and coordination are difficult due to the fact that the ink consumption degrees of different printing color groups are inconsistent during mass production is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a monitoring and alarming device for preventing the ink tank of a gravure printing machine from drying up. Background Art

[0002] A gravure printing machine is a machine that uses a gravure plate for printing. When a gravure printing machine prints, the entire surface of the printing plate cylinder is inked, and a doctor blade scrapes off the ink on the blank part of the plate surface, leaving the ink on the graphic part. Then, the paper passes through, and the impression cylinder presses on the back of the paper, so that the ink in the recessed part is directly transferred to the paper surface. Finally, the printed matter is stacked or rewound by the sheet delivery part.

[0003] The ink feeding methods of the gravure printing machine mainly include direct ink feeding with the printing plate cylinder partially immersed in the ink tank 1, and indirect ink feeding with the ink outlet roller immersed in the ink tank 1 transferring the ink to the printing plate cylinder. Both methods require ensuring that there is enough ink in the ink tank 1.

[0004] In a traditional gravure printing machine, an ink pump pumps the ink from an ink bucket through an ink pipe into the ink tank. The outlet of the ink pipe is placed at one end of the ink tank, and there is an opening at the other end of the ink tank. The height of the opening is higher than the bottom of the ink tank by a certain height. When the ink level in the ink tank reaches the height of the opening, the ink overflows from the opening and flows back into the ink bucket. A small part of the surface of the gravure roll is immersed below the liquid level. As the gravure roll rotates, the ink will be transferred to the printing material. There are some deficiencies in this method. First, the flow rate of the ink is fast, resulting in uneven inking. Moreover, the distance from the impression point of the gravure roll to the ink liquid level is long, which will cause the remaining ink after transfer to dry up in the cells, and there is also a chance for air to enter the cells. Second, when the gravure printing machine performs multi-color group printing, the printing areas are different, resulting in different amounts of ink of different colors and types required. And the process of calculating the ink consumption of different color groups is rather cumbersome. Therefore, in the actual production process, enterprises usually arrange the ink of each color group according to a unified quantity. When carrying out large-scale production, it often leads to inconsistent ink consumption degrees of printing color groups with different ink consumption amounts. Even, there may be a situation where the ink of some color groups is used up, while the ink of some color groups is consumed very little. Special personnel need to be arranged for inspections, but it still increases the uncertainty of production. Third, in order to avoid accidents caused by lack of ink, each color group is supplied with a sufficient amount of ink at one time. However, some ink will cause the volatilization or oxidation of component substances after multiple cycles, thus affecting the ink quality and printing quality. It is necessary to repeatedly prepare the ink, which increases the workload and raw material cost, and also causes batch differences in printed products. Summary of the Invention

[0005] To solve the problems existing in the prior art, the present utility model provides a dryness prevention monitoring and alarm device for the ink trough of a gravure press, which independently monitors the ink supply system of a gravure printing unit with multiple color groups, detects and feeds back parameters such as its flow rate, consumption rate, liquid level, etc., to ensure that during the normal production process, the ink supply of different color groups remains normal, there will be no printing accidents caused by ink shortage, nor unnecessary losses caused by excessive ink volume.

[0006] To achieve the above object, the present utility model adopts the following technical means. A dryness prevention monitoring and alarm device for the ink trough of a gravure press is provided in any one of the printing units of the gravure press. It is characterized in that it includes an ink containing mechanism arranged above and an ink supply device arranged below; it also includes a liquid level detection device, which is connected to the information output mechanism through a wire;

[0007] Among them, the ink containing mechanism includes an ink trough 1 with an isosceles trapezoidal cross-section that is wider at the top and narrower at the bottom, and an ink inlet pipe 2 and an ink outlet pipe 3 respectively arranged at both ends of the bottom of the ink trough 1, and is equipped with corresponding ink scraping plates and a gravure plate 4. The lower side of the gravure plate 4 extends into the ink trough 1 and is immersed below the liquid level of the ink contained in the ink trough 1;

[0008] A liquid level detection device is arranged on the ink containing mechanism, specifically on the ink trough 1, including a liquid level gauge 5. The installation position of the liquid level gauge 5 is on the inclined plane inside the ink trough 1, at the same horizontal plane as a specific depth of the gravure plate 4 immersed in the ink. The liquid level gauge 5 is connected to a liquid level display module 6 and an alarm module 7 in the information output mechanism through a wire;

[0009] An ink supply device is arranged below the ink trough 1, including a circulating ink bucket 8. The outer circle of the circulating ink bucket 8 is wrapped with a water bath heating sleeve 9. A water inlet pipe 10 extends into the sleeve on the outer side wall of the water bath heating sleeve 9, and a water outlet pipe 11 is arranged at the bottom of the outer wall near the bottom of the heating sleeve 9. The water inlet pipe 10 and the water outlet pipe 11 are connected to a circulating heating water tank 12; a rotating disk is arranged at the bottom inside the circulating ink bucket 8, and stirring blades are arranged on the side of the rotating disk to stir the ink in the bucket.

[0010] Preferably, the liquid level detection device includes three liquid level gauges 5, and their installation positions are respectively opposite to different proportions of the vertical height H of the gravure plate 4 immersed in the ink in the fully loaded state of the ink trough 1, corresponding to the positions of 30%H, 50%H, and 70%H respectively; the three liquid level gauges 5 are all connected to the liquid level display module 6 through wires, and are respectively connected to three different alarm modules 7 with sound and light effects through wires alone.

[0011] Preferably, it further includes an ink consumption speed detection device, which is also connected to the information output mechanism through a wire; the ink consumption speed detection device is arranged on the ink supply device and includes a standard metering tube 13 with its lower end communicating with the circulating ink bucket 8 and a fixing bracket 14. The maximum scale line of the standard metering tube 13 is at the same horizontal plane as the highest liquid level of the circulating ink bucket 8. Liquid level gauges 5 are arranged at the maximum scale line of the standard metering tube 13 and at each unit volume marking position. At the same time, an electronic timer 15 and a microprocessor 16 are installed on the fixing bracket 14. The liquid level gauge 5 and the electronic timer 15 on the standard metering tube 13 are both connected to the microprocessor 16 through wires. The microprocessor 16 is connected to a speed module 17 that displays the ink consumption speed and a time module 18 that displays the remaining available time of the ink through wires. The function of the time module 18 is to calculate the time that the total ink can be used at the current speed based on the ink consumption speed and the total amount of ink.

[0012] Principle and beneficial effects of the present utility model:

[0013] In this application, different-level liquid level detection and reminder alarm devices are arranged on the traditional ink trough 1. During the operation of the gravure printing machine, corresponding reminder information is automatically sent according to the level of the ink in the ink trough 1, providing a time reference for the operator to prepare the ink in advance; in addition, an ink consumption speed detection device that is synchronized with the ink bucket liquid level but not affected by the ink flow in the ink bucket is arranged in the ink supply mechanism, providing a relatively stable environment with high detection accuracy. After stable data is detected in this environment, the ink consumption speed of the entire printing unit can be obtained by amplifying according to the proportional relationship, and then the available time of the ink can be calculated, providing a time reference for subsequent ink replenishment; this application is based on the printing unit in the gravure printing machine and can adapt to gravure printing machines with multiple color groups. Each printing unit can prepare the ink supply according to its own printing conditions. During mass production, problems that are difficult to manage and coordinate will not occur due to inconsistent ink consumption degrees of different printing color groups. The operator can intuitively and clearly know when and where to handle which printing unit, reducing the labor intensity and improving the production efficiency. Description of the drawings

[0014] Figure 1 is the structural schematic diagram of this application.

[0015] Figure 2 is the connection schematic diagram of this application.

[0016] In the figure, there are an ink sump 1, an ink inlet pipe 2, an ink outlet pipe 3, a gravure plate 4, a liquid level gauge 5, a liquid level display module 6, an alarm module 7, a circulating ink bucket 8, a heating jacket 9, a water inlet pipe 10, a water outlet pipe 11, a heating water tank 12, a standard metering pipe 13, a fixing bracket 14, an electronic timer 15, a microprocessor 16, a speed module 17, and a time module 18. Detailed implementation mode

[0017] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings.

[0018] As Figure 1 and 2 shown, the anti-drying monitoring and alarm device for the ink sump of the gravure printing machine is arranged in any one of the printing units in the gravure printing machine, and includes an ink containing mechanism, an ink supply device, and a liquid level detection device. The liquid level detection device is connected to an information output mechanism through a wire.

[0019] The ink containing mechanism includes an ink sump 1 with an isosceles trapezoidal cross-section that is wider at the top and narrower at the bottom, and an ink inlet pipe 2 and an ink outlet pipe 3 respectively arranged at both ends of the bottom of the ink sump 1, and is equipped with corresponding ink scraping plates and a gravure plate 4. The lower side of the gravure plate 4 extends into the ink sump 1 and is immersed below the ink liquid level contained in the ink sump 1. A liquid level detection device is arranged on the ink containing mechanism. The liquid level detection device includes three liquid level gauges 5, and the horizontal planes of their installation positions correspond to different proportions of the vertical height H of the gravure plate 4 immersed in the ink in the fully loaded state of the ink sump 1, corresponding to the positions of 30%H, 50%H, and 70%H respectively. The three liquid level gauges 5 are all connected to a liquid level display module 6 through wires, and are respectively connected to three different alarm modules 7 with sound and light effects through wires alone.

[0020] An ink supply device is arranged below the ink tank 1, including a circulating ink barrel 8, the outer ring of the circulating ink barrel 8 wraps a water bath heating jacket 9, an outer wall of the water bath heating jacket 9 is provided with a water inlet pipe 10 extending into the jacket, a water outlet pipe 11 is arranged at the bottom of the outer wall near the bottom of the heating jacket 9, and the water inlet pipe 10 and the water outlet pipe 11 are connected to a circulating heating water tank 12; a rotating disk is arranged at the bottom of the circulating ink barrel 8, and a stirring plate is arranged on the side of the rotating disk to stir the ink in the barrel; an ink consumption speed detection device is also arranged on the periphery of the water bath heating jacket 9, which is also connected to the information output mechanism through a wire; a label having a lower end connected to the circulating ink barrel 8 is provided. The quasi-metering tube 13 and the fixed bracket 14, the maximum scale line of the standard metering tube 13 and the highest liquid level of the circulating ink barrel 8 are at the same horizontal plane, and a liquid level meter 5 is set at the maximum scale line of the standard metering tube 13 and each unit volume mark position. At the same time, an electronic timer 15 and a microprocessor 16 are installed on the fixed bracket 14. The liquid level meter 5 and the electronic timer 15 on the standard metering tube 13 are connected to the microprocessor 16 through wires, and the microprocessor 16 is connected to a speed module 17 that displays the ink consumption speed in the information output mechanism, and a time module 18 that displays the remaining time of ink. When in use, add appropriate amount of ink to different printing units of the gravure printing machine. Here, take the printing unit with larger ink consumption as an example, add the maximum amount of ink, that is, the depth of the gravure plate 4 immersed in the ink liquid surface in the ink tank 1 is H at this time, the installation position horizontal planes of the three liquid level gauges 5 are 0.7H, 0.5H and 0.3H from top to bottom, respectively, and the liquid level display module 6 and the alarm module 7 connected to the liquid level gauge 5 at 0.7H are both green light effect, the alarm sound interval is 5S, and the time is 10s; the liquid level display module 6 and the alarm module 7 connected to the liquid level gauge 5 at 0.5H are both orange light effect, the alarm sound interval is 3S, and the time is 30s; the liquid level display module 6 and the alarm module 7 connected to the liquid level gauge 5 at 0.3H are both red light effect, the alarm sound interval is 1S, and the time is 50s; the operator can intuitively know the current position of the ink level in each printing unit, can roughly calculate the time period when the ink needs to be replenished, and can prepare the ink in advance.

[0021] In addition, the measurement accuracy of the standard metering tube 13 connected to the circulating ink bucket 8 is 0.1 ml. The volume corresponding to a height of 1.0 cm is 1 ml. When adding ink to the circulating ink bucket 8, the valve of the standard metering tube 13 is opened to fill it with ink. The ink level in the circulating ink bucket 8 is the same as that in the standard metering tube 13. After the printing press starts working, the liquid level gauges 5 at the upper and lower ends of the standard metering tube 13 start working. At the same time, the electronic timer 15 and the microprocessor 16 are also in working states. Assuming that the ink in the standard metering tube 13 drops by 1.0 cm and the used time is recorded, the data is transmitted to the microprocessor 16, and the volume and time corresponding to a 1.0 cm drop of ink in the entire circulating ink bucket 8 can be calculated. Furthermore, precise data such as the ink consumption speed and the available ink time are displayed under the conversion of the speed module 17 and the time module 18 to obtain the precise time point for replenishing ink.

[0022] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A monitoring and alarm device for preventing ink tank drying up in a gravure printing machine, arranged in any printing unit in the gravure printing machine, characterized in that: It includes an ink containing mechanism disposed on the upper part and an ink supplying device disposed on the lower part; it also includes a liquid level detecting device, which is connected to the information output mechanism through a wire; The ink containing mechanism comprises an ink tank (1) having a cross section which is an isosceles trapezoid and is wider at the top and narrower at the bottom, and an ink inlet pipe (2) and an ink outlet pipe (3) respectively arranged at two ends of the bottom of the ink tank (1), and is equipped with a corresponding ink scraper and a gravure printing plate (4); the lower side of the gravure printing plate (4) extends into the ink tank (1) and is immersed below the liquid level of the ink contained in the ink tank (1); A liquid level detection device is provided on the ink containing mechanism, specifically provided on the ink tank (1), and comprises a liquid level meter (5). The installation position of the liquid level meter (5) is located on the inclined surface inside the ink tank (1) and is located at the same horizontal plane as the specific depth of the gravure printing plate (4) immersed in the ink. The liquid level meter (5) is connected to the liquid level display module (6) and the alarm module (7) in the information output mechanism via a wire. An ink supply device is arranged below the ink tank (1), comprising a circulating ink barrel (8), the outer ring of the circulating ink barrel (8) wraps around a water bath heating jacket (9), an outer wall of the water bath heating jacket (9) is provided with a water inlet pipe (10) extending into the jacket, a bottom of the outer wall close to the bottom of the heating jacket (9) is provided with a water outlet pipe (11), the water inlet pipe (10) and the water outlet pipe (11) are connected to a circulating heating water tank (12); a rotating disk is arranged at the bottom of the circulating ink barrel (8), and a stirring plate is arranged on the side of the rotating disk to stir the ink in the barrel.

2. The anti-drying monitoring and alarm device for the ink tank of a gravure printing machine according to claim 1 is characterized in that: The liquid level detection device comprises three liquid level gauges (5), the horizontal planes of which are installed at different proportions to the vertical height H of the gravure printing plate (4) immersed in the ink when the ink tank (1) is fully loaded, corresponding to the positions of 30%H, 50%H and 70%H respectively; the three liquid level gauges (5) are all connected to the liquid level display module (6) via wires, and are also connected to three different alarm modules (7) with sound and light effects via wires.

3. The anti-drying monitoring and alarm device for the ink tank of a gravure printing machine according to claim 1 or 2, characterized in that: It also includes an ink consumption speed detection device, which is connected to the information output mechanism via a wire. The ink consumption speed detection device is arranged on the ink supply device, and includes a standard metering tube (13) whose lower end is connected to the circulating ink barrel (8) and a fixed bracket (14). The maximum scale line of the standard metering tube (13) and the highest liquid level of the circulating ink barrel (8) are at the same horizontal plane. A liquid level meter (5) is arranged at the maximum scale line of the standard metering tube (13) and at each unit volume mark position. At the same time, an electronic timer (15) and a microprocessor (16) are installed on the fixed bracket (14). The liquid level meter (5) and the electronic timer (15) on the standard metering tube (13) are connected to the microprocessor (16) via a wire. The microprocessor (16) is connected to a speed module (17) in the information output mechanism that displays the ink consumption speed, and a time module (18) that displays the remaining time available for ink.

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