Positioning traction multi-registration intaglio printing press and using method thereof

Abstract

The invention discloses a positioning traction multi-registration intaglio printing press and a using method thereof.The positioning traction multi-registration intaglio printing press comprises a discharging system, a receiving system and a main control panel, and an intaglio printing roller and a monitoring system are arranged between the discharging system and the receiving system; the monitoring system is used for monitoring material rolling positions at a feeding port and a discharging port of the intaglio roller, the monitoring system is electrically connected with the main control board, the intaglio roller is electrically connected with the main control board, and the main control board is used for controlling the rotating speed of the intaglio roller. The monitoring system is electrically connected with the main control board, so that the rotating speed of the gravure roller is correspondingly adjusted according to a monitoring signal of the monitoring system, and the tension of a roll material in the gravure press is not influenced by the adjustment of the rotating speed of the gravure roller, so that the change of the tension of the roll material caused by the adjustment of a synchronous phase difference mode is avoided, and registration printing is realized; and the precision of registration printing is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of gravure printing machines, and in particular to a positioning, traction and multiple registration gravure printing machine and a use method thereof. Background Art

[0002] Gravure printing machines are mainly used for printing soft packaging bags, cigarette packaging, wine boxes and other packaging. The gravure printing machines in the prior art use a registration method to achieve accurate alignment of the printed pattern by adjusting the synchronous phase difference of the two printing units, i.e., registration. Secondary printing is performed on the coil with the pattern printed on it. The tension of the coil changes due to the adjustment of the synchronous phase difference of the two printing units, and the coil with changed tension deforms the material pattern, resulting in a mismatch between the circumference of the printing plate and the circumference of the existing pattern. In a strongly coupled tension control system, large-scale and high-frequency registration adjustment of the upstream printing unit will lead to strong registration error oscillation of the downstream printing unit. It is difficult to achieve the ideal effect for the packaging pattern printed in the above manner, and the time required to adjust the synchronous phase difference is long, the printing cost increases accordingly, and the yield rate is poor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of the prior art that the web is deformed during registration printing and cannot be effectively registered, and to provide a positioning and traction multiple registration gravure printing machine and a method for using the same.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A positioning and traction multiple registration gravure printing machine, the positioning and traction multiple registration gravure printing machine comprises a material unwinding system, a material receiving system and a main control board, a gravure plate roller and a monitoring system are arranged between the material unwinding system and the material receiving system, the monitoring system is used to monitor the coil position at the material inlet and the material outlet of the gravure plate roller, the monitoring system is electrically connected to the main control board, the gravure plate roller is electrically connected to the main control board, and the main control board is used to control the rotation speed of the gravure plate roller;

[0006] When the monitoring system detects that the distance between the coil released by the unwinding system and the feed port is less than a preset value, the main control board reduces the rotation speed of the gravure roller; when the distance between the coil and the feed port is greater than the preset value, the main control board increases the rotation speed of the gravure roller;

[0007] When the monitoring system detects that the distance between the coil released by the unwinding system and the discharge port is less than a preset value, the main control board increases the rotation speed of the gravure roller; when the distance between the coil and the discharge port is greater than the preset value, the main control board reduces the rotation speed of the gravure roller.

[0008] In the present scheme, a printing positioning mark structure is provided on the gravure roller. When the positioning mark on the gravure roller is printed on the coil released by the unwinding system, it overprints the outer periphery of the positioning mark on the coil to form a complete positioning mark in combination with the positioning mark on the coil, that is, the positioning mark on the gravure roller is printed in register with the positioning mark on the coil. During printing, in order to ensure that the position of the coil is consistent with a preset value when the coil enters the gravure roller from the feed port, that is, accurate overprinting is achieved when the distance between the positioning mark on the coil and the feed port in the gravure printing machine meets the preset value, the position of the coil entering the feed port and the discharge port of the gravure roller is monitored by a monitoring system, and the signal is transmitted to the main control board. The main control board adjusts the rotation speed of the gravure roller accordingly according to the signal so that the positioning mark on the gravure roller is always printed in register with the positioning mark on the coil at a preset value, and is smoothly recovered through the receiving system.

[0009] Preferably, the positioning, traction and multiple registration gravure printing machine also includes a tension maintaining mechanism, which is arranged between the unwinding system and the feed port, and the monitoring system is arranged corresponding to the tension maintaining mechanism and is used to monitor the distance between the coil and the feed port when the coil is in the tension maintaining mechanism.

[0010] In the present scheme, a tension holding mechanism is provided so that the tension of the coil before entering the gravure roller is effectively expanded within the tension range of the coil itself, so that the monitoring system can effectively identify the position of the coil. In addition, the tension holding mechanism can also isolate the tension of the coil in the gravure printing machine, that is, the tension in the tension holding mechanism is not affected by the adjustment of other components of the gravure printing machine, which causes the tension to change. While achieving tension isolation, it prevents the gravure printing machine from transmitting tension changes to the tension holding mechanism when adjusting the position of the coil in the gravure printing machine. This ensures that the position of the coil entering the gravure printing roller can be effectively identified by the monitoring system, and the registration printing can be smoothly achieved under the regulated rotation speed of the gravure printing roller.

[0011] Preferably, the tension maintaining mechanism includes a first traction device and a second traction device, the first traction device and the second traction device are electrically connected to the main control board respectively, and the monitoring system is used to monitor the positioning mark on the coil when the coil is located between the first traction device and the second traction device.

[0012] In the present scheme, by setting up the first traction device and the second traction device, the coil is located between the first traction device and the second traction device when entering the tension maintaining mechanism, and the monitoring system correspondingly monitors the positioning mark on the coil between the first traction device and the second traction device. The positioning mark is pre-printed in the coil, and the gravure printing machine does not need to print the positioning mark. The monitoring system identifies the positioning mark to adjust the rotation speed of the gravure plate roller accordingly to achieve register printing. The tension of the coil is maintained and the transmission of tension is isolated by the first traction device and the second traction device, thereby avoiding the situation where the tension is transmitted to the coil in the tension maintaining mechanism when other components of the gravure printing machine are adjusted, thereby affecting the register printing.

[0013] Preferably, the monitoring system includes a third monitoring device, and the third monitoring device is arranged between the first traction device and the second traction device.

[0014] In this solution, the third monitoring device is used to monitor whether the tension of the coil located in the tension maintaining mechanism is consistent with the tension range of the coil's own material, and then transmits the signal to the main control board and controls the first traction device and the second traction device to adjust according to the main control board so that the tension of the coil is consistent with the tension range of its own material, thereby avoiding deformation of the coil.

[0015] Preferably, a first deviation correcting device is provided between the tension maintaining mechanism and the unwinding system, wherein the first deviation correcting device is provided on the side of the coil and is used to adjust the position of the coil in the positioning and traction multiple registration gravure printing machine along the width direction of the coil.

[0016] In the present scheme, a first deflection correction device is provided to meet the requirements of registration printing when the coil material enters the feed port after being released from the unwinding system. The first deflection correction device adjusts the position of the coil material in the width direction in the gravure printing machine, and the gravure plate roller adjusts the position of the coil material in the length direction in the gravure printing machine, so that the position of the coil material released from the discharge port is consistent with the preset value, which is convenient for further processing and material collection.

[0017] Preferably, the monitoring system includes a first monitoring device and a second monitoring device, wherein the first monitoring device is arranged between the feed port and the discharge system, and the second monitoring device is arranged between the discharge port and the collection system.

[0018] In this solution, a first monitoring device is provided to monitor the coil material entering the feed port, and a second monitoring device is provided to monitor the coil material released from the discharge port, so that the position of the coil material during printing in the next step can be effectively guaranteed, thereby improving the processing accuracy of the coil material registration printing.

[0019] Preferably, the positioning and traction multiple registration gravure printing machine also includes a curing device and a cooling device which are arranged in sequence, the curing device and the cooling device are arranged between the discharge port and the material receiving system, and the second monitoring device is located between the curing device and the discharge port.

[0020] In this solution, the curing device and the cooling device are used to cure and cool the coiled material in time after the registration printing by the gravure plate roller, so as to facilitate the next registration printing and material collection of the coiled material.

[0021] Preferably, the positioning, traction and multiple registration gravure printing machine comprises a plurality of printing units, each printing unit is provided with the gravure printing plate roller and the monitoring system, and the plurality of printing units are arranged in sequence along the receiving direction of the coiled material.

[0022] In the present scheme, a plurality of printing units are arranged in the gravure printing machine, and the plurality of printing units are arranged in sequence and the web finally flows into the material receiving system after passing through the plurality of printing units. Each printing unit includes a gravure plate roller and a monitoring system. That is to say, after the web enters the previous printing unit, the positioning mark on the gravure plate roller is printed on the outer peripheral side of the positioning mark of the web to realize registration printing and then flows out and is registered again when flowing to the next printing unit. In addition, the monitoring system is used to monitor the position of the web flowing out of the previous printing unit in the gravure printing machine to improve the printing accuracy of the gravure printing machine with multiple printing units and avoid problems such as misalignment of the web and failure of registration printing of the positioning mark.

[0023] Preferably, the positioning, traction and multiple registration gravure printing machine further comprises a second deviation correcting device, and the second deviation correcting device is arranged between two adjacent printing units.

[0024] In this solution, a second correction device is provided to correct the position of the web between two adjacent printing units in the gravure printing machine to ensure that the position of the web flowing out of the previous printing unit meets the requirements of re-registration printing when entering the next printing unit.

[0025] A method for using a positioning and traction multiple registration gravure printing machine, the method for using is implemented by using the positioning and traction multiple registration gravure printing machine as described above, and the method for using comprises the following steps:

[0026] S1. The monitoring system monitors the positioning mark on the coil released by the unwinding system. When the position between the positioning mark and the feed port of the gravure roller is less than a preset value, the main control board reduces the rotation speed of the gravure roller. When the position between the positioning mark and the feed port is greater than the preset value, the main control board increases the rotation speed of the gravure roller.

[0027] S2, the monitoring system monitors the positioning mark on the coil released by the unwinding system, and when the position between the positioning mark and the discharge port of the gravure roller is less than a preset value, the main control board increases the rotation speed of the gravure roller, and when the position between the positioning mark and the discharge port is greater than a preset value, the main control board reduces the rotation speed of the gravure roller;

[0028] S3, after adjusting the rotation speed of the gravure roller, the positioning mark on the gravure roller is overprinted on the outer peripheral side of the positioning mark on the coil to form a complete positioning mark.

[0029] In the present scheme, the method of use allows the roll material to be accurately overprinted with the positioning mark on the gravure roller during overprinting. Compared with the method of adjusting the roll material position by synchronous phase difference, it not only avoids pattern deformation caused by changes in roll material tension, but also can achieve effective overprinting of the positioning mark on the gravure roller with the positioning mark on the roll material, so that the overprinted roll material meets the needs of users.

[0030] The positive and progressive effect of the present invention is that: the present invention sets up a monitoring system and electrically connects the monitoring system to the main control board, so that the rotation speed of the gravure roller is adjusted accordingly according to the monitoring signal of the monitoring system. The rotation speed adjustment of the gravure roller will not affect the tension of the roll in the gravure printing machine, thereby avoiding the change of the roll tension caused by the adjustment of the synchronous phase difference method, and the monitoring system cooperates with the gravure roller to overprint the positioning mark on the gravure roller to the positioning mark on the roll released by the unwinding system, which can also achieve registration, thereby ensuring the accuracy of registration printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure is a schematic structural diagram of a single printing unit according to a preferred embodiment of the present invention.

[0032] Figure 2 It is a structural schematic diagram of a positioning, traction and multiple registration gravure printing machine according to a preferred embodiment of the present invention.

[0033] Figure 3 It is a flow chart of a preferred embodiment of the present invention.

[0034] Description of reference numerals:

[0035] Unloading system 1

[0036] Receiving system 2

[0037] Gravure plate roller 3

[0038] Feed port 31

[0039] Discharge port 32

[0040] Monitoring system 4

[0041] The first monitoring device 41

[0042] The second monitoring device 42

[0043] The third monitoring device 43

[0044] Tension holding mechanism 5

[0045] The first traction device 51

[0046] Second traction device 52

[0047] The first deviation correcting device 6

[0048] Curing device 7

[0049] Cooling device 8

[0050] The second deviation correcting device 9

[0051] Printing unit 100 DETAILED DESCRIPTION

[0052] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0053] This embodiment provides a positioning and pulling multiple registration gravure printing machine, the specific structure is as follows Figure 1 , Figure 2 and Figure 3 As shown, the positioning and traction multiple registration gravure printing machine includes a feeding system 1, a receiving system 2 and a main control board (not shown in the figure), wherein a gravure plate roller 3 and a monitoring system 4 are arranged between the feeding system 1 and the receiving system 2, the monitoring system 4 is used to monitor the coil position at the feeding port 31 and the discharging port 32 of the gravure plate roller 3, the monitoring system 4 is electrically connected to the main control board, the gravure plate roller 3 is electrically connected to the main control board, and the main control board is used to control the rotation speed of the gravure plate roller 3.

[0054] Specifically, the unloading system 1 is located at the first end of the gravure printing machine, and the receiving system 2 is located at the second end of the gravure printing machine. The coil released by the unloading system 1 has its own positioning mark and pattern. The coil can be a holographic laser coil or a coil printed with a pattern in the prior art. The coil flows from the unloading system 1 to the gravure plate roller 3, and a structure for printing positioning marks is provided on the gravure plate roller 3. The gravure plate roller 3 is used to print its own printing positioning mark structure on the outer peripheral side of the positioning mark on the coil to achieve overprinting. When the accuracy of the overprinting meets the user's requirements, it is called overprinting. This is a prior art and will not be elaborated on here. By printing the positioning mark on the gravure roller 3 on the outer peripheral side of the positioning mark of the paper roll material, a complete positioning mark is formed when the roll material flows out from the gravure roller 3. Of course, the complete positioning mark can be formed by multiple overprinting, not just one overprinting. The above is only an explanation of the positioning mark printed on the roll material by the positioning mark of the gravure roller 3. Through overprinting, the pattern on the roll material can also form an anti-counterfeiting mark due to overprinting. The anti-counterfeiting mark is a mark in the prior art and will not be described in detail here. The feed port 31 is arranged near the unloading system 1, and the discharge port 32 is arranged near the receiving system 2. The monitoring system 4 respectively monitors the position of the positioning mark of the coil of material entering the gravure plate roller 3 from the feed port 31 in the gravure printing machine, and monitors the position of the coil of material in the gravure printing machine after the positioning mark of the gravure plate roller 3 flowing out of the discharge port 32 is overprinted with the positioning mark of the coil of material, and transmits the signal to the main control board. The main control board adjusts the rotation speed of the gravure plate roller 3 accordingly according to the preset position signal of the coil of material in the gravure printing machine through the cursor digital positioning technology in the prior art, and corrects the position of each layout of the positioning mark of the gravure plate roller 3 when the positioning mark of the gravure plate roller 3 is overprinted on the coil of material in real time, so that the positioning mark of the gravure plate roller 3 and the positioning mark on the coil of material are accurately overprinted on the peripheral side of the positioning mark of the coil of material during overprinting, that is, the overprinting accuracy is increased, that is, register printing. The monitoring system 4 can be located above or below the coil of material to monitor the position of the coil of material in the gravure printing machine. When the monitoring system 4 When it is detected that the distance between the coil released by the unwinding system 1 and the feed port 31 is less than a preset value when being monitored by the monitoring system 4, the main control board reduces the rotation speed of the gravure plate roller 3, so that the coil released by the unwinding system 1 can be registered with the positioning mark on the gravure plate roller 3 when the speed is too fast. When the distance between the coil and the feed port 31 is greater than the preset value when being monitored by the monitoring system 4, the main control board increases the rotation speed of the gravure plate roller 3, so that the coil released by the unwinding system 1 can be registered with the positioning mark on the gravure plate roller 3 when the speed is too slow. The above preset value is determined through multiple experiments and according to the material properties of the coil itself. For example, the positioning mark on the coil is 30% of the size of the complete positioning mark, and the positioning mark on the gravure plate roller 3 is 7% of the size of the complete positioning mark. By setting multiple gravure plate rollers 3 to overprint the positioning marks on the coil in turn, the complete positioning mark can be finally printed. This is a prior art and will not be elaborated on here.

[0055] Similarly, when the monitoring system 4 detects that the distance between the coil released by the unwinding system 1 and the discharge port 32 is less than a preset value when being monitored by the monitoring system 4, the main control board increases the rotation speed of the gravure plate roller 3 so that the rotation speed of the gravure plate roller 3 meets the overprinting requirements and the position of the coil in the gravure printing machine meets the requirements of the next overprinting when it flows to the next processing step; when the distance between the coil and the discharge port 32 is greater than a preset value, the main control board reduces the rotation speed of the gravure plate roller 3 so that the rotation speed of the gravure plate roller 3 meets the requirements of the processing when the coil flows to the next processing step. The above-mentioned unwinding system 1 is an unwinding device in the prior art, and the receiving system 2 is a winding device in the prior art, which will not be elaborated herein.

[0056] In this embodiment, the main control board can be interconnected with the Ethernet. The signal of the monitoring system 4 is transmitted to the Ethernet in real time and then transmitted to the main control board through the Ethernet to reduce the reaction time of the main control board. The rotation speed of the gravure plate roller 3 is adjusted based on the real-time processing of the Ethernet to realize the registration printing of the positioning mark on the coil and the positioning mark on the gravure plate roller 3. This is the prior art and will not be elaborated on here.

[0057] Furthermore, the positioning and traction multiple registration gravure printing machine also includes a tension maintaining mechanism 5, which is arranged between the unwinding system 1 and the feed port 31, and the monitoring system 4 is arranged corresponding to the tension maintaining mechanism 5 and is used to monitor the distance between the coil and the feed port 31 when the coil is in the tension maintaining mechanism 5.

[0058] Specifically, the tension holding mechanism 5 is located between the unwinding system 1 and the feed port 31. The coil released by the unwinding system 1 enters the feed port 31 through the tension holding mechanism 5. The monitoring system 4 simultaneously monitors the positioning mark or pattern on the coil entering the tension holding mechanism 5. The tension holding mechanism 5 is used to keep the tension of the coil unchanged before entering the gravure plate roller 3, and effectively unfold the coil within the tension range of the coil itself so that the positioning mark or pattern is easier to be monitored by the monitoring system 4, so that the monitoring system 4 can effectively identify the position of the coil. In addition, the tension holding mechanism 5 is independent of other components in the gravure printing machine, so that the tension holding mechanism 5 can also monitor the tension of the coil before entering the gravure printing plate roller 3. The tension of the coil in the gravure printing machine is isolated, that is, the tension of the coil in the tension holding mechanism 5 is not affected by the position adjustment of other parts of the gravure printing machine, so that the tension isolation is achieved and the tension change is avoided from being transmitted to the tension holding mechanism 5 when the gravure printing machine adjusts the position of the coil in the gravure printing machine, thereby ensuring that the position of the coil entering the gravure plate roller can be effectively identified by the monitoring system 4, and the registration printing can be smoothly realized under the adjustment of the rotation speed of the gravure plate roller 3, thereby improving the registration accuracy. Through the above method, the registration accuracy is controlled within ±0.06mm, the adjustment efficiency and production efficiency are improved, the cost is effectively reduced, and the yield rate of the registration printing is improved.

[0059] In this embodiment, the tension maintaining mechanism 5 includes a first traction device 51 and a second traction device 52, the first traction device 51 and the second traction device 52 are electrically connected to the main control board respectively, the first traction device 51 and the second traction device 52 are traction rollers in the prior art, and the monitoring system 4 is used to monitor the positioning mark on the coil when the coil is located between the first traction device 51 and the second traction device 52.

[0060] Specifically, when the coil enters the tension holding mechanism 5, it moves along the first traction device 51 to the second traction device 52 and finally moves to the feed port 31. By setting the first traction device 51 and the second traction device 52, the coil is located between the first traction device 51 and the second traction device 52 when entering the tension holding mechanism 5. The monitoring system 4 corresponds to monitoring the positioning mark on the coil between the first traction device 51 and the second traction device 52. The positioning mark is pre-printed in the coil, and the gravure printing machine does not need to print the positioning mark to save processing procedures and processing time. The positioning mark is identified by the monitoring system 4 to adjust the rotation speed of the gravure plate roller 3 accordingly, and the tension holding mechanism 5 is used to effectively flatten the coil to ensure that the positioning mark is effectively identified by the monitoring system 4. That is to say, the coil is in the tension holding mechanism. The position accuracy in the holding mechanism 5 is improved by isolating the tension transmission, and on this basis, the accuracy of the monitoring signal of the monitoring system 4 is further improved, so that the rotation speed adjustment of the gravure plate roller 3 is more precise, and the accuracy of the registration is correspondingly guaranteed when the overprint forms a complete positioning mark, thereby achieving effective registration. The tension of the roll material is maintained and the tension transmission is isolated by the first traction device 51 and the second traction device 52, so as to avoid the situation where the tension is transmitted to the roll material in the tension holding mechanism 5 when other parts of the gravure printing machine are adjusted, thereby affecting the overprint. Compared with the method of synchronously adjusting the positions of each roller in the gravure printing machine by phase difference to achieve registration printing, it has higher accuracy and there is no need to worry about the roll material being deformed when the positions of each roller in the gravure printing machine are adjusted by phase difference, making it impossible to effectively overprint.

[0061] In this embodiment, the monitoring system 4 includes a third monitoring device 43 . The third monitoring device 43 is disposed between the first traction device 51 and the second traction device 52 .

[0062] Specifically, the third monitoring device 43 is a sensor or a chip. The third monitoring device 43 is located below the coil and is used to monitor the tension of the coil in the tension holding mechanism 5. The sensor data can be pre-set according to the tension characteristics of the different coils themselves through the sensor. The rotation speeds of the first traction device 51 and the second traction device 52 are adjusted by uploading the sensor data to the main control board, thereby adjusting the tension of the coil between the first traction device 51 and the second traction device 52 when the coil enters the tension holding mechanism 5. The rotation speeds of the first traction device 51 and the second traction device 52 are not changed by the adjustment of other components of the gravure printing machine, so that the tension of the coil is isolated in the tension holding mechanism 5. The sensor is used to monitor in real time whether the tension of the coil located in the tension holding mechanism 5 meets the tension range of the coil's own material, and then transmit the signal to the main control board and control the first traction device 51 and the second traction device 52 to adjust according to the main control board so that the tension of the coil meets the tension range of its own material to avoid deformation of the coil.

[0063] In this embodiment, a first deviation correcting device 6 is arranged between the tension maintaining mechanism 5 and the unwinding system 1. The first deviation correcting device 6 is arranged on the side of the coil and is used to adjust the position of the coil in the positioning and traction multiple registration gravure printing machine along the width direction of the coil.

[0064] Specifically, the gravure printing machine is arranged along the length direction, and the tension holding mechanism 5, the monitoring system 4 and the gravure plate roller 3 are arranged in sequence between the unwinding system 1 and the receiving system 2. A first correcting device 6 is also arranged between the tension holding mechanism 5 and the unwinding system 1. The first correcting device 6 is arranged along the width direction of the gravure printing machine and is a roller that reciprocates along the width direction of the gravure printing machine. After the coil is released from the unwinding system 1, it is adjusted in the width direction by the first correcting device 6 and then enters the tension holding mechanism 5, so that the coil in the tension holding mechanism 5 does not need to maintain the tension beyond the tension range of the coil itself due to the inclination of the coil, so as to avoid the coil being stretched and deformed or the monitoring system 4 of the positioning mark on the coil being deviated due to the inclination of the coil, thereby affecting the accuracy of overprinting. In addition, the position of the coil in the gravure printing machine along the length direction of the gravure printing machine is adjusted by the gravure plate roller 3, so that the position of the coil released from the discharge port 32 is consistent with the preset value, which is convenient for further processing and receiving the coil by the receiving system 2, and reduces the error of overprinting.

[0065] In addition, the monitoring system 4 further includes a first monitoring device 41 and a second monitoring device 42 . The first monitoring device 41 is disposed between the feed port 31 and the discharge system 1 , and the second monitoring device 42 is disposed between the discharge port 32 and the collection system 2 .

[0066] Specifically, the first monitoring device 41 is a device for monitoring positioning marks in the prior art, and the second monitoring device 42 is a device for monitoring positioning marks in the prior art, which will not be described in detail here. The first monitoring device 41 is set to monitor the coil entering the feed port 31 and adjust the rotation speed of the gravure plate roller 3 in real time accordingly, so as to control the accuracy of overprinting within ±0.06mm, and the second monitoring device 42 is set to monitor the position of the coil released from the discharge port 32 in the gravure printing machine, and adjust the rotation speed of the gravure plate roller 3 in real time accordingly, so that the position of the coil when it is processed in the next step is effectively guaranteed, thereby improving the processing accuracy of overprinting.

[0067] In this embodiment, the positioning and traction multiple registration gravure printing machine also includes a curing device 7 and a cooling device 8 which are arranged in sequence. The curing device 7 and the cooling device 8 are arranged between the discharge port 32 and the material receiving system 2, and the second monitoring device 42 is located between the curing device 7 and the discharge port 32.

[0068] Specifically, after being overprinted by the gravure roller 3, the coil flows out from the discharge port 32 and then flows to the curing device 7. The ink is cured by the curing device 7 and then cooled by the cooling device 8, so that the positioning mark printed on the gravure roller 3 on the coil forms a whole with the coil. The curing device 7 and the cooling device 8 adopt the structure used for curing and cooling the coil in the prior art, which will not be elaborated in detail here.

[0069] Furthermore, the positioning and traction multiple registration gravure printing machine also includes an ink tank and a scraper used for overprinting, thereby meeting the overprinting requirements. This is the existing technology and will not be elaborated on here.

[0070] like Figure 2 As shown, the positioning and traction multiple registration gravure printing machine includes a plurality of printing units 100, each printing unit 100 is provided with a gravure plate roller 3, a monitoring system 4 and a tension maintaining mechanism 5, and the plurality of printing units 100 are arranged in sequence along the material receiving direction of the coil.

[0071] Specifically, the web releasing speed of the gravure printing machine in this embodiment is 300M / min. When the web releasing speed of the gravure printing machine reaches more than 200M / min, multiple printing units 100 are interconnected with the main control board through Ethernet to improve the synchronization rate of the actions of each printing unit 100, so that the action time deviation of each printing unit 100 is less than 100ns. After many experiments, it can be ensured that the overprinting accuracy is controlled within ±0.06mm. This is the existing technology and will not be elaborated here. Ten printing units 100 are sequentially arranged in the gravure printing machine. The multiple printing units 100 are sequentially connected and the web finally flows into the receiving system 2 after being overprinted multiple times by the multiple printing units 100. Each printing unit 100 includes a gravure plate roller 3, a monitoring system 4, a tension holding mechanism 5, a curing device 7 and a cooling device 8. That is, after the web enters the previous printing unit 100, the positioning mark on the gravure plate roller 3 is printed to the outer peripheral side of the positioning mark of the web, and then the web flows out and is again printed on the outer peripheral side of the positioning mark of the web when it flows to the next printing unit 100. Overprinting is performed on the surrounding side, the gravure plate roller 3, the monitoring system 4 and the tension maintaining mechanism 5 in each printing unit 100 realize multiple registration printing of the positioning marks on the roll material, and the multiple printing units 100 realize multiple positioning and multiple registration. At the same time, the tension maintaining mechanism 5 in each printing unit 100 can isolate the tension change of the roll material, and the mutually coupled roll materials will not change due to the rotation speed of the gravure plate roller 3 or the adjustment of other components, so as to improve the registration printing accuracy and avoid a series of defects caused by the method of adjusting the roll material by synchronous phase difference.

[0072] In addition, the monitoring system 4 is used to monitor the position of the roll material flowing out of the previous printing unit 100 in the gravure printing machine to improve the printing accuracy of the gravure printing machine with multiple printing units 100 and avoid problems such as misalignment of the positioning marks on the roll material and distortion of the printed pattern during overprinting.

[0073] In this embodiment, the unwinding system 1 includes an unwinding roller and a positioning mechanism, and the positioning mechanism is arranged between the unwinding roller and the feed port 31. The positioning mechanism is arranged to further improve the stability of the coil after being released from the unwinding system 1, reduce the tension fluctuation of the coil, improve the registration printing accuracy and printing efficiency, and improve the reliability of the gravure printing machine.

[0074] In this embodiment, the positioning, traction and multiple registration gravure printing machine further includes a second deviation correcting device 9 , which is arranged between two adjacent printing units 100 .

[0075] Specifically, by setting the second correcting device 9 between two adjacent printing units 100, the position of the roll material between the two adjacent printing units 100 in the gravure printing machine is corrected, ensuring that the position of the roll material flowing out of the previous printing unit 100 meets the demand for re-overprinting when entering the next printing unit 100, thereby improving the printing accuracy of repeated printing of the gravure printing machine and reducing the situation where the pattern is misplaced or distorted when overprinting again when the roll material meets the printing demand after one overprint.

[0076] like Figure 3 The present embodiment also provides a method for using a positioning and pulling multiple registration gravure printing machine. The method is implemented by using the above-mentioned positioning and pulling multiple registration gravure printing machine. The method includes the following steps:

[0077] S1, the monitoring system 4 monitors the positioning mark on the coil released by the unwinding system 1, and when the position between the positioning mark and the feed port 31 of the gravure roller 3 is less than a preset value, the main control board reduces the rotation speed of the gravure roller 3, and when the position between the positioning mark and the feed port 31 is greater than the preset value, the main control board increases the rotation speed of the gravure roller 3;

[0078] S2, the monitoring system 4 monitors the positioning mark on the coil released by the unwinding system 1, and when the position between the positioning mark and the discharge port 32 of the gravure roller 3 is less than a preset value, the main control board increases the rotation speed of the gravure roller 3, and when the position between the positioning mark and the discharge port 32 is greater than the preset value, the main control board reduces the rotation speed of the gravure roller 3;

[0079] S3, after adjusting the rotation speed of the gravure printing plate roller 3, the positioning mark on the gravure printing plate roller 3 is overprinted on the outer peripheral side of the positioning mark on the coil to form a complete positioning mark.

[0080] Specifically, the coil released by the unwinding system 1 is monitored by the monitoring system 4. The coil is a holographic laser coil and has a positioning mark. The positioning mark on the coil is 30% of the size of the complete positioning mark, and the remaining 70% of the positioning mark is completed by the gravure roller 3 through multiple registration printing. The monitoring system 4 monitors the positioning mark on the coil and compares it with the preset value of the position of the coil in the gravure printing machine to determine whether it is greater than, less than, or equal to the preset value. When the preset value is equal to the position of the coil in the gravure printing machine, the rotation speed of the gravure roller 3 does not need to be adjusted. At this time, the positioning mark on the gravure roller 3 is normally overprinted with the positioning mark of the coil to form a complete positioning mark; when the monitoring system 4 detects When the distance between the coil released by the unwinding system 1 and the feed port 31 is less than a preset value when monitored by the monitoring system 4, the main control board reduces the rotation speed of the gravure plate roller 3 so that the coil released by the unwinding system 1 can be registered with the positioning mark on the gravure plate roller 3 when the speed is too fast; when the distance between the coil released by the unwinding system 1 and the feed port 31 is greater than a preset value when monitored by the monitoring system 4, the main control board increases the rotation speed of the gravure plate roller 3 so that the coil released by the unwinding system 1 can be registered with the positioning mark on the gravure plate roller 3 when the speed is too slow; since the gravure printing machine is provided with 10 printing units 100, each printing unit 100 is provided with a gravure plate roller 3, a monitoring system 4, a tension maintaining mechanism 5 and the equipment required for overprinting. That is to say, when the positioning mark on the gravure plate roller 3 is overprinted with the positioning mark on the coil for the first time and flows to the next printing unit 100, it is also necessary to ensure that the position of the coil in the gravure printing machine when it flows out from the discharge port 32 meets the preset value, so as to ensure the printing accuracy of the coil when the next printing unit 100 is overprinted again. The position of the coil at the discharge port 32 in the gravure printing machine is monitored by the monitoring system 4. When the monitoring system 4 detects that the distance between the coil released by the unwinding system 1 and the discharge port 32 is less than the preset value when being monitored by the monitoring system 4, the main control board increases the rotation speed of the gravure plate roller 3 so that the rotation speed of the gravure plate roller 3 meets the requirement for the coil to flow to the next printing unit 100 for overprinting. During overprinting, the position of the web in the gravure printing machine meets the processing requirements. When the distance between the web and the discharge port 32 is greater than a preset value, the main control board reduces the rotation speed of the gravure plate roller 3 so that the rotation speed of the gravure plate roller 3 satisfies the position of the web in the gravure printing machine when the web flows to the next printing unit 100 for overprinting. This method of use improves the overprinting accuracy of the web during overprinting, that is, registered printing. When the web continues to be overprinted, that is, the gravure printing machine under multiple overprinting conditions, compared with the gravure printing machine that adjusts the web position by synchronous phase difference, not only does it avoid pattern deformation caused by changes in web tension, but it can also achieve effective registration, so that the web with complete positioning marks after registration meets user needs.

[0081] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A positioning and traction multiple registration gravure printing machine, characterized in that: The positioning traction multiple registration gravure printing machine includes a material unwinding system, a material receiving system and a main control board, a gravure plate roller and a monitoring system are arranged between the material unwinding system and the material receiving system, the monitoring system is used to monitor the coil position at the material inlet and the material outlet of the gravure plate roller, the monitoring system is electrically connected to the main control board, the gravure plate roller is electrically connected to the main control board, and the main control board is used to control the rotation speed of the gravure plate roller; When the monitoring system detects that the distance between the coil released by the unwinding system and the feed port is less than a preset value, the main control board reduces the rotation speed of the gravure roller; when the distance between the coil and the feed port is greater than the preset value, the main control board increases the rotation speed of the gravure roller; When the monitoring system detects that the distance between the coil released by the unwinding system and the discharge port is less than a preset value, the main control board increases the rotation speed of the gravure roller; when the distance between the coil and the discharge port is greater than the preset value, the main control board reduces the rotation speed of the gravure roller.

2. The positioning and traction multiple registration gravure printing machine according to claim 1, characterized in that: The positioning, traction and multiple registration gravure printing machine also includes a tension maintaining mechanism, which is arranged between the unwinding system and the feed port, and the monitoring system is arranged corresponding to the tension maintaining mechanism and is used to monitor the distance between the coil and the feed port when the coil is in the tension maintaining mechanism.

3. The positioning and traction multiple registration gravure printing machine according to claim 2, characterized in that: The tension maintaining mechanism includes a first traction device and a second traction device, the first traction device and the second traction device are electrically connected to the main control board respectively, and the monitoring system is used to monitor the positioning mark on the coil when the coil is located between the first traction device and the second traction device.

4. The positioning and pulling multiple registration gravure printing machine according to claim 3, characterized in that: The monitoring system includes a third monitoring device, and the third monitoring device is arranged between the first traction device and the second traction device.

5. The positioning and traction multiple registration gravure printing machine according to claim 2, characterized in that: A first deviation-correcting device is arranged between the tension holding mechanism and the unwinding system. The first deviation-correcting device is arranged on the side of the coil and is used to adjust the position of the coil in the positioning and traction multiple registration gravure printing machine along the width direction of the coil.

6. The positioning and pulling multiple registration gravure printing machine according to claim 1, characterized in that: The monitoring system includes a first monitoring device and a second monitoring device. The first monitoring device is arranged between the feed port and the discharge system, and the second monitoring device is arranged between the discharge port and the collection system.

7. The positioning and pulling multiple registration gravure printing machine according to claim 6, characterized in that: The positioning and traction multiple registration gravure printing machine also includes a curing device and a cooling device which are arranged in sequence. The curing device and the cooling device are arranged between the discharge port and the material receiving system, and the second monitoring device is located between the curing device and the discharge port.

8. The positioning and pulling multi-registration gravure printing machine according to claim 1, characterized in that: The positioning, traction and multiple registration gravure printing machine comprises a plurality of printing units, each of which is provided with the gravure printing plate roller and the monitoring system, and the plurality of printing units are arranged in sequence along the receiving direction of the coiled material.

9. The positioning and pulling multiple registration gravure printing machine according to claim 8, characterized in that: The positioning, traction and multiple registration gravure printing machine also includes a second deviation correcting device, which is arranged between two adjacent printing units.

10. A method for using a positioning and traction multiple registration gravure printing machine, the method for using the positioning and traction multiple registration gravure printing machine according to any one of claims 1 to 9 being implemented, characterized in that: The method of use comprises the following steps: S1. The monitoring system monitors the positioning mark on the coil released by the unwinding system. When the position between the positioning mark and the feed port of the gravure roller is less than a preset value, the main control board reduces the rotation speed of the gravure roller. When the position between the positioning mark and the feed port is greater than the preset value, the main control board increases the rotation speed of the gravure roller. S2, the monitoring system monitors the positioning mark on the coil released by the unwinding system, and when the position between the positioning mark and the discharge port of the gravure roller is less than a preset value, the main control board increases the rotation speed of the gravure roller, and when the position between the positioning mark and the discharge port is greater than a preset value, the main control board reduces the rotation speed of the gravure roller; S3, after adjusting the rotation speed of the gravure roller, the positioning mark on the gravure roller is overprinted on the outer peripheral side of the positioning mark on the coil to form a complete positioning mark.

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