A general back coating roller device for a gravure printing machine and its usage method

Abstract

The present invention discloses a general backcoating roller device for an intaglio printing machine, which includes a printing unit, and also includes a connecting frame, a backcoating mechanism and a tension mechanism. The connecting frame is fixed on one side of the printing unit. The backcoating mechanism is mounted on the upper end of the connecting frame. The tension mechanism is fixed on the connecting frame and is located below the backcoating mechanism. A control mechanism is provided on the printing unit. The backcoating mechanism and the tension mechanism are respectively electrically connected to the control mechanism. The present invention also discloses a usage method of the general backcoating roller device for an intaglio printing machine. The general backcoating roller device for an intaglio printing machine and its usage method of the present invention can be applicable to different products by using a single backcoating roller, reduce the production and replacement of backcoating rollers, save plate-making costs and plate-changing time. At the same time, it can solve the problem of poor overprinting caused by the wear of the backcoating roller and the out-of-sync of different parts of the printing plate circumference, and improve the utilization rate of the backcoating roller, reduce the number of idle backcoating rollers, and avoid waste of resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of printing equipment, and specifically relates to a general back coating roller device for an intaglio printing machine and its usage method. Background Art

[0002] For cigarette package printing products, most of them adopt the web-fed intaglio printing method, and are cut into single sheets online after printing. During the printing process, due to different moisture contents of the paper, after printing and cutting into single sheets, the products will be bent and deformed. Currently, the back coating method is mostly used to adjust the moisture content. The more traditional operation method is to pass the web through the back coating alone first, and then print it on the machine. With the development of technology, there has already been a practice of directly adding a back coating mechanism to the printing machine for back coating, which has been widely used.

[0003] Due to the requirements of printing operations, a certain tension needs to be maintained during web printing, and it is required to keep the plate circumference of each printing roller the same during printing to ensure a fixed tension. Therefore, when a back coating mechanism is needed, a back coating roller corresponding to the plate circumference needs to be set correspondingly, resulting in a variety of back coating rollers. Each time the printing product is changed, the back coating roller needs to be replaced correspondingly, and it is easy to cause confusion during replacement. At the same time, due to printing wear, the plate circumference of the back coating roller will change, resulting in out-of-sync plate circumferences, which will cause different printing speeds and unstable printing tensions during printing, leading to the problem of poor overprinting. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a general back coating roller device for an intaglio printing machine and its usage method, which can be used for different products, does not require replacing the back coating roller, and will not cause poor overprinting due to wear of the back coating roller.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A general back coating roller device for an intaglio printing machine includes a printing unit, and further includes a connecting frame, a back coating mechanism and a tension mechanism. The connecting frame is fixed on one side of the printing unit. The back coating mechanism is mounted on the upper end of the connecting frame. The tension mechanism is fixed on the connecting frame and is located below the back coating mechanism. A control mechanism is provided on the printing unit. The back coating mechanism and the tension mechanism are respectively electrically connected to the control mechanism.

[0007] Specifically, the tension mechanism includes a tension roller, and movement regulators fixed on the connecting frame are respectively arranged on both sides of the tension roller. The movement regulators are electrically connected to the control mechanism.

[0008] Specifically, it further includes a tension meter. The tension meter is fixed on the side of the control mechanism. The movement regulator is electrically connected to the control mechanism through the tension meter.

[0009] Specifically, the back coating mechanism includes a coater and a back coating roller. The coater and the back coating roller are matched with each other, and the back coating roller can use different plate circumferences.

[0010] Specifically, the web passes through the back coating mechanism, the tension mechanism and the printing unit in sequence.

[0011] Specifically, a control screen is provided in front of the control mechanism. The control screen is used to adjust the parameters of the printing unit, the back coating mechanism and the tension mechanism, and correspondingly control the printing unit, the back coating mechanism and the tension mechanism through the control mechanism.

[0012] Another technical solution for the present invention to solve the above technical problems is:

[0013] A method of using a general back coating roller device for a gravure printing machine as described above, including the following steps:

[0014] Install the printing roller and install the printing roller into the printing unit;

[0015] Install the back coating roller and install the back coating roller onto the back coating mechanism;

[0016] Install the web, load the web onto the machine and pass it through the back coating mechanism, the tension mechanism and the printing unit in sequence;

[0017] Read the tension gauge and read the existing tension value in the tension gauge;

[0018] Adjust the tension parameter. Determine the tension evaluation value according to the circumference of the printing roller, refer to the data of the tension evaluation value and the tension value, and adjust the corresponding tension parameter in the control screen;

[0019] Adjust the tension mechanism. The control mechanism drives the motion regulator according to the adjusted tension parameter to make the tension roller move until the tension value in the tension gauge is equal to the tension evaluation value.

[0020] Specifically, the adjusted tension parameter is the difference between the tension value and the tension evaluation value.

[0021] The present invention has the following beneficial effects: Using a single back coating roller can be applicable to different products, reduce the production and replacement of back coating rollers, save plate making costs and plate changing time. At the same time, it can solve the problem of poor overprint caused by the wear of the back coating roller and the out-of-synchronization of the printing plate circumference, and improve the utilization rate of the back coating roller, reduce the number of idle back coating rollers, and avoid waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0023] Figure 2It is a schematic enlarged structure diagram of part A in the embodiment of the present invention.

[0024] Figure 3 It is a schematic structure diagram of the usage state of the embodiment of the present invention.

[0025] Figure 4 It is a schematic cross-sectional structure diagram of the usage state of the embodiment of the present invention.

[0026] The meanings represented by each serial number in the attached drawings are as follows:

[0027] 1 Printing unit, 2 Control mechanism, 3 Control screen, 4 Tension meter, 5 Connecting frame, 6 Coater, 7 Back coating roller, 8 Tension roller, 9 Movement regulator, 10 Web. Specific embodiments

[0028] The following will make a detailed description of the present invention with reference to the attached drawings.

[0029] Embodiment:

[0030] A common back coating roller 7 device in the embodiment of the present invention includes a printing unit 1, and also includes a connecting frame 5, a back coating mechanism and a tension mechanism. The connecting frame 5 is fixed on one side of the printing unit 1. The back coating mechanism is erected on the upper end of the connecting frame 5. The tension mechanism is fixed on the connecting frame 5 and is located below the back coating mechanism. A control mechanism 2 is provided on the printing unit 1. The back coating mechanism and the tension mechanism are respectively electrically connected to the control mechanism 2. By adding a tension mechanism to adjust the tension of the web 10 coming out of the back coating mechanism, the tension of the web 10 can meet the printing tension requirements when entering the printing unit 1, and different tension values can be adjusted according to different plate circumferences to ensure the stability of the paper tension during printing. The printing unit 1 in this embodiment generally refers to the first printing seat of a printing machine. Generally, only one back coating roller 7 device provided by this embodiment is required for a printing machine, but the number can also be appropriately increased to meet the actual printing needs.

[0031] Specifically, the tension mechanism includes a tension roller 8. Movement regulators 9 fixed to the connecting frame 5 are respectively provided on both sides of the tension roller 8. The movement regulators 9 are electrically connected to the control mechanism 2. The movement regulators 9 operate synchronously and can control the movement of the tension roller 8, so as to meet the adjustment of the tension of the web 10 and achieve the purpose of maintaining the printing tension of the web 10.

[0032] Specifically, it further includes a tension meter 4. The tension meter 4 is fixed on the side of the control mechanism 2. The movement regulators 9 are electrically connected to the control mechanism 2 through the tension meter 4. The tension meter 4 is used to display in real time the tension borne by the web 10 on the tension mechanism, so as to achieve the purpose of real-time monitoring and corresponding adjustment.

[0033] Specifically, the back coating mechanism includes a coater 6 and a back coating roller 7. The coater 6 and the back coating roller 7 are matched with each other, and the back coating roller 7 can be made with different plate circumferences. Only one back coating roller 7 is required to be applicable to different products. According to the situation of printing with a single back coating roller 7, the printing durability can reach more than 4 million impressions.

[0034] Specifically, the web 10 sequentially passes through the back coating mechanism, the tension mechanism and the printing unit 1. After the web 10 is first back-coated by the back coating mechanism, the tension is adjusted by the tension mechanism, and then it enters the printing unit 1 for printing. Products with different plate circumferences are correspondingly adjusted with different tensions, so as to ensure that a single back coating roller 7 can meet the use requirements of different products.

[0035] Specifically, a control screen 3 is provided directly in front of the control mechanism 2. The control screen 3 is used to adjust the various parameters of the printing unit 1, the back coating mechanism and the tension mechanism, and correspondingly control the printing unit 1, the back coating mechanism and the tension mechanism through the control mechanism 2. The control screen 3 is used to adjust different parameters and correspondingly feedback them to the printing unit 1, the back coating mechanism and the tension mechanism.

[0036] Another technical solution for the present invention to solve the above technical problems is:

[0037] A method of using a general back coating roller 7 device for a gravure printing machine as described above, comprising the following steps:

[0038] Install the printing roller and install the printing roller into the printing unit 1; that is, install the printing roller correspondingly according to different products to make preparations before printing.

[0039] Install the back coating roller 7 and install the back coating roller 7 on the back coating mechanism; the back coating roller 7 needs the same maintenance as the printing roller. Therefore, when the machine is stopped, the back coating roller 7 needs to be removed for maintenance and installed on the machine only when back coating is required.

[0040] Install the web 10, load the web 10 onto the machine and sequentially pass it through the back coating mechanism, the tension mechanism and the printing unit 1; at this time, the preparations before printing are basically completed, and printing can be attempted.

[0041] Read the tension table 4 and read the existing tension value in the tension table 4; during the printing attempt, the tension table 4 will display the corresponding tension value of the tension roller 8 in real time, which can be used to judge the working state of the tension mechanism.

[0042] Adjust the tension parameter, determine the tension evaluation value according to the circumference of the printing roller, and adjust the corresponding tension parameter in the control panel 3 with reference to the data of the tension evaluation value and the tension value; specifically, the adjusted tension parameter is the difference between the tension value and the tension evaluation value. The tension evaluation value is obtained by evaluating and measuring the required tension during printing with different plate circumferences, and this data is evaluated on the premise that the printing can proceed normally and stably.

[0043] Adjust the tension mechanism, and the control mechanism 2 drives the motion regulator 9 according to the adjusted tension parameter to move the tension roller 8 until the tension value in the tension meter 4 is equal to the tension evaluation value. Through the corresponding adjustment, the back coating roller 7 can be adapted to different products, and at the same time, the equipment modification is convenient, the structure is simple, and it is suitable for wide promotion.

[0044] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A general back coating roller device for a gravure printing machine, comprising a printing unit (1), characterized in that: It further includes a connecting frame (5), a back coating mechanism and a tension mechanism. The connecting frame (5) is fixed to one side of the printing unit (1). The back coating mechanism is mounted on the upper end of the connecting frame (5). The tension mechanism is fixed to the connecting frame (5) and located below the back coating mechanism. A control mechanism (2) is provided on the printing unit (1). The back coating mechanism and the tension mechanism are respectively electrically connected to the control mechanism (2). The tension mechanism includes a tension roller (8). Movement regulators (9) fixed to the connecting frame (5) are respectively provided on both sides of the tension roller (8). The movement regulators (9) are electrically connected to the control mechanism (2). The back coating mechanism includes a coater (6) and a back coating roller (7). The coater (6) and the back coating roller (7) match each other. The back coating roller (7) can be applicable to different plate circumferences.

2. The gravure press general back coating roller device according to claim 1, characterized in that: It further includes a tension gauge (4). The tension gauge (4) is fixed to the side of the control mechanism (2). The movement regulator (9) is electrically connected to the control mechanism (2) through the tension gauge (4).

3. The general back coating roller device for intaglio printing machines according to claim 1 or 2, characterized in that: The web (10) passes through the back coating mechanism, the tension mechanism and the printing unit (1) in sequence.

4. The general backcoating roller device for gravure printing machines according to claim 3, characterized in that: A control screen (3) is provided directly in front of the control mechanism (2). The control screen (3) is used to adjust various parameters of the printing unit (1), the back coating mechanism and the tension mechanism, and correspondingly control the printing unit (1), the back coating mechanism and the tension mechanism through the control mechanism (2).

5. A method of using a general back coating roller device for an intaglio printing press as described in claims 1-4, characterized in that, It includes the following steps: Install the printing roller and install the printing roller into the printing unit; Install the back coating roller and install the back coating roller onto the back coating mechanism; Install the web, load the web onto the machine and pass it through the back coating mechanism, the tension mechanism and the printing unit in sequence; Read the tension gauge and read the existing tension value in the tension gauge; Adjust the tension parameter. Determine the tension evaluation value according to the circumference of the printing roller. Refer to the data of the tension evaluation value and the tension value, and adjust the corresponding tension parameter in the control screen; Adjust the tension mechanism. The control mechanism drives the movement regulator according to the adjusted tension parameter to make the tension roller move until the tension value in the tension gauge is equal to the tension evaluation value.

6. The usage method according to claim 5, characterized in that: The adjusted tension parameter is the difference between the tension value and the tension evaluation value.

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