A card DOD production line for single-color inkjet printing of cards

Abstract

The present invention discloses a card DOD production line for single-color inkjet printing of cards, which includes a frame, a card feeding device, a card pre-treatment device, a card inkjet printing device, a card collecting device, and a card conveying device arranged on the frame; a card flipping device is provided between the first card inkjet printing device and the second card inkjet printing device; both the first card inkjet printing device and the second card inkjet printing device include a plasma surface treatment module and an inkjet printing module; the card conveying device is composed of a first card conveying device, a second card conveying device, and a third card conveying device; the third card conveying device is used to convey the cards to be printed into the inkjet printing module, and the third card conveying device includes a suction belt and a third card conveying mechanism for driving the suction belt to move. The card DOD production line of the present invention can achieve double-sided single-color inkjet printing of cards, and has higher inkjet printing efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of smart card manufacturing, and particularly relates to a card DOD production line for single-color inkjet printing on cards. Background Art

[0002] UV inkjet printing is usually called DOD inkjet printing. It has the advantages of safety, environmental protection, bright colors and strong adhesion. With the continuous development of technology, DOD inkjet printing has become more and more popular in the printing industry. Currently, it is basically divided into a scanning inkjet printing method in which the nozzle moves back and forth multiple times and the ink is gradually superimposed, and a single-pass inkjet printing method in which the nozzle is fixed and the material moves. The single-pass inkjet printing method is more than ten times more efficient than the multiple-pass inkjet printing method. However, since the clarity of the previous single-pass inkjet printing method was much worse than that of the multiple-pass inkjet printing method, it was rarely used for high-precision and high-clarity printing, especially for picture printing. Now the quality of single-pass inkjet printing has been greatly improved. In addition to realizing single-color printing, multi-nozzle color mixing to achieve color printing has also been successful. With the continuous expansion of the market demand, the cost of DOD inkjet printing, including inkjet printers, has been greatly reduced. Its development direction is how to improve the inkjet printing quality and efficiency, and save space and labor costs.

[0003] In the multi-color DOD inkjet printing process, when using the single-pass inkjet printing method, since the same inkjet point on the printing material needs to receive ink from multiple nozzles, in order to ensure the clarity of the inkjet printing, the requirement for the movement accuracy of the printing material is very high, resulting in a relatively slow inkjet printing speed. In the single-color inkjet printing process, since there is no need for front and back color registration inkjet printing, the requirement for the movement accuracy of the printing material is reduced. Using the existing color registration printing method, such as the printing method disclosed in the invention patent application with the application publication number CN118386690A, "A high-precision double-sided DOD inkjet printing device, method and production line for sheet materials", the production efficiency is low. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a card DOD production line for single-color inkjet printing on cards; the card DOD production line can realize double-sided single-color inkjet printing on cards, and has higher inkjet printing efficiency.

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

[0006] A card DOD production line for single-color inkjet printing on cards, comprising a frame, a card issuing device, a card pre-treatment device, a card inkjet printing device, a card receiving device and a card conveying device arranged on the frame for sequentially conveying the cards issued by the card issuing device to the card pre-treatment device, the card inkjet printing device and the card receiving device, wherein,

[0007] The card printing device includes a first card printing device and a second card printing device arranged in sequence; the first card printing device is used for printing on the first side of the card; the second card printing device is used for printing on the second side of the card; a card flipping device for flipping the card is arranged between the first card printing device and the second card printing device; both the first card printing device and the second card printing device include a plasma surface treatment module and an inkjet printing module;

[0008] The card conveying device includes a first card conveying device, a second card conveying device and a third card conveying device, where,

[0009] The first card conveying device is used for conveying the card from the card issuing device to the plasma surface treatment module in the first card printing device;

[0010] The second card conveying device is respectively arranged between the card pre-treatment device and the plasma surface treatment module in the first card printing device, between the inkjet printing module in the first card printing device and the inkjet printing module in the second card printing device, and between the inkjet printing module in the second card printing device and the card receiving device; where, the second card conveying device includes an O-shaped belt and a second card conveying mechanism for driving the movement of the O-shaped belt, where, there are two groups of O-shaped belts, and the two groups of O-shaped belts are arranged in parallel;

[0011] The third card conveying device is used for conveying the card to be printed to the inkjet printing module, and the third card conveying device is respectively arranged between the plasma surface treatment module and the inkjet printing module in the first card printing device, and between the plasma surface treatment module and the inkjet printing module in the second card printing device; where, the third card conveying device includes a suction belt and a third card conveying mechanism for driving the movement of the suction belt; a negative pressure device is arranged below the suction belt on the frame;

[0012] A positioning mechanism for positioning the card entering the third card conveying device is arranged at the head end of the third card conveying device on the frame, and the positioning mechanism includes a positioning wheel arranged on one side of the frame and a positioning driving mechanism arranged on the other side of the frame for pushing the card towards the positioning wheel, where,

[0013] The positioning driving mechanism is arranged opposite to the positioning wheel and is located on both sides of the suction belt;

[0014] There are multiple groups of positioning wheels, and the multiple groups of positioning wheels are arranged in sequence along the conveying direction of the card, and each group of positioning wheels is horizontally rotatably connected to the frame;

[0015] The positioning and driving mechanism includes a push rod and a positioning cylinder for pushing the push rod to swing outwards. Among them, the middle part of the push rod is hinged to the frame, the upper end of the push rod is hinged to the frame through a tension spring, and the elastic force of the tension spring causes the push rod to swing towards the direction of the positioning wheel; the positioning cylinder is installed on the frame, and the telescopic rod of the positioning cylinder contacts the lower end of the push rod; when the telescopic rod of the positioning cylinder extends out and pushes the lower end of the push rod to cause the upper end of the push rod to swing outwards; when the card needs to be positioned, the telescopic rod of the positioning cylinder retracts, and the upper end of the push rod pushes the card towards the direction of the conveying and positioning wheel under the elastic force of the tension spring until the card contacts the wheel surface of the positioning wheel.

[0016] Preferably, the card pre-processing device includes an OCR recognition module, a magnetic writing module, a personalization processing module, a card turning module, and a waste card collection module arranged in sequence along the conveying direction of the card. Among them, the OCR recognition module is used to recognize the cards issued by the card issuing device; the magnetic writing module is used to write magnetic information on the cards that are correctly recognized in the OCR recognition module; the personalization processing module is used to perform personalization processing on the cards that have completed magnetic writing; the card turning module is used to turn over the cards that have completed personalization processing; and the waste card collection module is used to collect waste cards.

[0017] Preferably, the inkjet printing module includes a bracket, a printing module arranged on the bracket, a lifting driving mechanism for driving the printing module to move vertically up and down, and a longitudinal driving mechanism for driving the printing module to move along a direction perpendicular to the conveying direction of the card; among them, a moisturizing mechanism is arranged at the inkjet printing head of the printing module, the moisturizing mechanism includes a moisturizing box, a moisturizing pad arranged in the moisturizing box, and a moisturizing driving mechanism for driving the moisturizing box to move along a direction perpendicular to the conveying direction of the card, and the number of the moisturizing pads is the same as the number of the inkjet printing heads and corresponds to each other one by one.

[0018] Preferably, a scraping blade and a scraping driving mechanism for driving the scraping blade to rotate are further arranged on the moisturizing box. Among them, the scraping blade is rotatably connected in the moisturizing box; the scraping driving mechanism is used to drive the scraping blade to rotate so that the scraping blade contacts the inkjet printing head.

[0019] Preferably, the card flipping device includes a support, a flipping mechanism disposed within the support, and a rotary drive mechanism for driving the flipping mechanism to rotate. Among them, the flipping mechanism includes flipping seats disposed on both sides of the support; the flipping seats are rotatably connected to the support through a rotating shaft; a groove extending along its length direction is disposed inside the flipping seat; the rotary drive mechanism is used to drive the rotating shafts on the flipping seats on both sides to rotate synchronously; the card flipping device further includes a limiting mechanism for limiting the end of the card during the flipping process of the card, and the limiting mechanism includes a roller and a vertical drive mechanism for driving the roller to move vertically; when the card needs to be flipped, the vertical drive mechanism drives the roller to rise and causes the wheel surface of the roller to abut against the end of the card; the rotary drive mechanism drives the card to perform a 180-degree flip with the wheel surface of the roller as the rotation fulcrum.

[0020] Preferably, a limiting component is disposed on the support, and the limiting component is used to prevent the card from being thrown out due to centrifugal force during flipping; the limiting component includes an arc-shaped limiting plate and baffles disposed on both sides of the arc-shaped limiting plate. Among them, the arc-shaped limiting plate is installed on the support and is located above the flipping seat; during the flipping process of the card, one end of the card contacts the wheel surface of the roller, and the other end contacts the arc-shaped limiting plate.

[0021] Preferably, both the first card printing device and the second card printing device further include a UV curing module, a cooling module, and an OCR detection module.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The card DOD production line of the present invention is suitable for monochromatic printing of cards. The suction belt drives the card into the inkjet printing module, and a negative pressure is generated above the suction module through a negative pressure device, thereby adsorbing the card on the suction belt to prevent the card from shifting during the printing process; the third card conveying mechanism drives the suction belt to move continuously, thereby continuously conveying the card into the inkjet printing module for monochromatic printing. In this way, compared with the existing equipment using spot color printing, the printing efficiency of the card DOD production line of the present invention is higher. Description of the Drawings

[0024] Figures 1 - 2 Structural diagrams of two different perspectives of the first specific embodiment of the card DOD production line of the present invention.

[0025] Figure 3 Top view of the card DOD production line of the present invention.

[0026] Figure 4 and Figure 5Schematic structural diagrams of two different perspectives of an inkjet printing module.

[0027] Figure 6 and Figure 7 Schematic structural diagrams of two different perspectives of a moisturizing mechanism.

[0028] Figure 8 Schematic structural diagram of a scraping mechanism.

[0029] Figure 9 Schematic structural diagram of a second conveying device and a third conveying device.

[0030] Figure 10 Top view of a second conveying device and a third conveying device.

[0031] Figure 11 and Figure 12 Schematic structural diagrams of two different perspectives of a card flipping device.

[0032] Figure 13 and Figure 14 Schematic structural diagrams of two different perspectives of a card rotating device (removing the limit component).

[0033] Figure 15 Schematic diagram of card flipping.

[0034] Figure 16 Schematic structural diagram of a driven pulley.

[0035] Figure 17 Schematic structural diagram of a positioning mechanism.

[0036] Figure 18 Schematic diagram of the positioning mechanism positioning a card.

[0037] Figure 19 Schematic structural diagram of the second specific embodiment of the card DOD production line of the present invention. Specific embodiment

[0038] The present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0039] Embodiment 1

[0040] Refer to Figures 1 - 18 , the card DOD production line of the present invention includes a frame 1, a card issuing device 2 provided on the frame 1, a card pre-processing device, a card printing device, a card receiving device 13, and a card conveying device 10 for sequentially conveying the cards to the card issuing device 2, the card pre-processing device, the card printing device, and the card receiving device 13.

[0041] Refer to Figures 1 - 16, the card printing device is divided into a first card printing device and a second card printing device. Among them, the first card printing device is used to print on the first side of the card; the second card printing device is used to print on the second side of the card; a card flipping device 12 for flipping the card is provided between the first card printing device and the second card printing device; the card printing device includes a plasma surface treatment module 7, an inkjet printing module 8, a UV curing module, a cooling module 9 and an OCR detection module 11. Among them, the plasma surface treatment module 7, the inkjet printing module 8, the UV curing module, the cooling module 9 and the OCR detection module 11 are arranged in sequence along the direction of card conveyance;

[0042] See Figures 1 - 16 , the card conveyance device 10 includes a first card conveyance device, a second card conveyance device 102 and a third card conveyance device 103. Among them,

[0043] The first card conveyance device is used to convey the card from the card issuing device 2 to the plasma surface treatment module 7 in the first card printing device;

[0044] The second card conveyance device 102 is respectively arranged between the card pre-treatment device and the plasma surface treatment module 7 in the first card printing device, between the inkjet printing module 8 in the first card printing device and the inkjet printing module 8 in the second card printing device, and between the inkjet printing module 8 in the second card printing device and the card receiving device 13;

[0045] The third card conveyance device 103 is respectively arranged between the plasma surface treatment module 7 and the inkjet printing module 8 in the first card printing device, and between the plasma surface treatment module 7 and the inkjet printing module 8 in the second card printing device.

[0046] In this embodiment, the first card conveyance device adopts an existing toothed chain and a corresponding sprocket conveyance mechanism. The sprocket is driven to rotate by a driving motor, thereby driving the toothed chain to move, so as to drive the card issued by the card issuing device 2 to move to the OCR recognition module 3, the magnetic writing module 4, the personalization processing module 5, the card turning module 16 and the waste card collection module 6 in sequence, and finally transfer the card that has completed the pre-treatment to the second card conveyance device 102;

[0047] The second card conveyance device 102 includes an O-shaped belt 18 and a second card conveyance mechanism for driving the O-shaped belt 18 to move. Among them, there are two groups of O-shaped belts 18, and the two groups of O-shaped belts 18 are arranged in parallel;

[0048] The third card conveying device 103 includes a suction belt 17 and a first card conveying mechanism for driving the movement of the suction belt 17. Among them, a negative pressure device is provided below the suction belt 17 on the frame 1.

[0049] With the above settings, considering that the position of the card cannot shift during the inkjet printing process to avoid printing errors, in this embodiment, the third card conveying device 103 is used alone to send the card to the inkjet printing module 8. The third card conveying device 103 uses the suction belt 17 as the conveyor belt, and negative pressure is generated by the negative pressure device, so that the card is adsorbed on the suction belt 17, thereby avoiding the shift of the card during the inkjet printing process, ensuring the printing accuracy of the card, and improving the printing efficiency at the same time. In the plasma surface treatment and the subsequent processing procedures after inkjet printing, since there will be a large amount of heat on the card surface, that is, the card surface is at a high temperature, in this embodiment, the second card conveying device 102 is used alone for conveying. Among them, the second card conveying device 102 uses an O-shaped belt 18 as the conveyor belt. The O-shaped belt 18 has the characteristic of high temperature resistance and is not easily deformed in the high-temperature processing procedures, thereby ensuring the conveying accuracy and conveying efficiency of the card.

[0050] In addition, both the first card conveying mechanism and the second card conveying mechanism can adopt a pulley conveying mechanism. In order to reduce costs, a set of pulleys can be shared between adjacent two groups of card conveying devices 10. For example, the driven pulley in the second card conveying device 102 can be used as the driving pulley in the third card conveying device 103; the driven pulley in the third card conveying device 103 can be used as the driving pulley in the second card conveying device 102. Therefore, a first driving part 151 for installing the suction belt 17 and a second driving part 152 for installing the O-shaped belt 18 are provided on the corresponding driven pulley 15. In this way, a set of driving motors can drive multiple groups of card conveying devices 10 to move synchronously, thus greatly saving costs.

[0051] See Figures 1 - 16, the pre-processing device for the card includes an OCR recognition module 3, a magnetic writing module 4, a personalization processing module 5, a card turning module 16, and a waste card collection module 6 arranged in sequence along the conveying direction of the card. Among them, the OCR recognition module 3 is used to recognize the cards sent by the card issuing device 2; the magnetic writing module 4 is used to write magnetic information on the cards correctly recognized by the OCR recognition module 3; the personalization processing module 5 is used to perform personalization processing on the cards after magnetic writing; the card turning module 16 is used to turn over the cards after personalization processing; the waste card collection module 6 is used to collect waste cards, and the waste cards include the cards not belonging to the current processing recognized by the OCR recognition module 3, or the cards with defects, or the waste cards in the previous processing procedures.

[0052] See Figures 1 - 16 , the inkjet printing module 8 includes a bracket 801, a printing module 802 arranged on the bracket 801, a lifting drive mechanism for driving the printing module 802 to move vertically up and down, and a longitudinal drive mechanism for driving the printing module 802 to move along a direction perpendicular to the card conveying direction; among them

[0053] The lifting drive mechanism and the longitudinal drive mechanism can adopt cylinder drive or a drive mode combining a motor and a screw rod transmission mechanism;

[0054] A moisturizing mechanism 14 is arranged at the inkjet printing head of the printing module 802. The moisturizing mechanism 14 includes a moisturizing box 142, a moisturizing pad 143 arranged in the moisturizing box 142, and a moisturizing drive mechanism for driving the moisturizing box 142 to move along a direction perpendicular to the card conveying direction. Among them, the number of the moisturizing pads 143 is the same as the number of the inkjet printing heads and they correspond one by one; when the printing module 802 is not working, the moisturizing box 142 covers the lower part of the printing module 802, and the moisturizing pad 143 covers the corresponding inkjet printing head to moisturize the inkjet printing head; when the printing module 802 needs to work, the moisturizing drive mechanism drives the moisturizing box 142 to separate from the printing module 802, so that the inkjet printing head in the printing module 802 separates from the moisturizing pad 143 in the moisturizing box 142;

[0055] In addition, a scraping blade 145 and a scraping drive mechanism 144 for driving the scraping blade 145 to rotate are also arranged on the moisturizing box 142. Among them, the scraping blade 145 is rotatably connected in the moisturizing box 142; the scraping drive mechanism 144 is used to drive the scraping blade 145 to rotate to make the scraping blade 145 contact with the inkjet printing head; at the same time, driven by the moisturizing drive mechanism, the scraping blade 145 can scrape the inkjet printing head.

[0056] In this embodiment, the moisturizing driving mechanism can adopt a driving mode combining a motor and a lead screw driving mechanism; the ink scraping driving mechanism 144 can adopt a cylinder drive; in addition, the moisturizing mechanism 14 in this embodiment can also be implemented with reference to the "flash spraying moisturizing mechanism" in the utility model patent with the authorization announcement number CN214396000U, "a digital inkjet printing machine".

[0057] Refer to Figures 1 - 16 , the card flipping device 12 includes a support 121, a flipping mechanism arranged in the support 121, and a rotation driving mechanism for driving the flipping mechanism to rotate. Among them,

[0058] the flipping mechanism includes flipping seats 1210 arranged on both sides of the support 121; the flipping seats 1210 are rotatably connected to the support 121 through a rotating shaft; a groove extending along its length direction is arranged on the inner side of the flipping seat 1210; the grooves in the two flipping seats 1210 on both sides are arranged oppositely, and both sides of the card to be flipped respectively enter the grooves in the corresponding flipping seats 1210;

[0059] the rotation driving mechanism is used to drive the rotating shafts on the two flipping seats 1210 to rotate synchronously. The rotation driving mechanism includes a rotation motor 122 and a synchronous transmission mechanism; the rotation motor 122 is installed on the support 121; the synchronous transmission mechanism is used to transmit the power of the rotation motor 122 to the rotating shafts in the two flipping seats 1210; the synchronous transmission mechanism includes a transmission shaft 126; the transmission shaft 126 is connected to the main shaft of the rotation motor 122 through a coupling, and the transmission shaft 126 is connected to the rotating shafts on the two flipping seats 1210 through a belt transmission mechanism 127; by driving the transmission shaft 126 to rotate through the rotation motor 122, the two belt transmission mechanisms 127 are driven to work synchronously, and then the two flipping seats 1210 are rotated synchronously;

[0060] In order to ensure the flipping accuracy, the rotation driving mechanism further includes a detection mechanism for detecting the rotation angle of the transmission shaft 126. The detection mechanism includes a sensor 124 arranged on the support 121 and a rotating disk 123 arranged on the transmission shaft 126. Among them, the rotating disk 123 is located in the detection port of the sensor 124, and two groups of notches arranged symmetrically at 180 degrees are arranged on the rotating disk 123; when the transmission shaft 126 rotates, the rotating disk 123 also rotates accordingly; in the initial state, the sensor 124 detects the notch on the rotating disk 123. During the 180-degree flipping process of the card, if the sensor 124 detects the notch on the rotating disk 123 again, it indicates that the card has been flipped by 180 degrees.

[0061] Since the card flipping device 12 in this embodiment does not need to clamp the card, there is no need to set up a corresponding clamping mechanism, so the structure is simpler and the manufacturing cost is lower.

[0062] See Figures 1 - 16 , the card flipping device 12 further includes a limiting mechanism for limiting the end of the card during the flipping process of the card. The limiting mechanism includes a roller 129 and a vertical driving mechanism for driving the roller 129 to move vertically; wherein, the vertical driving mechanism includes a lifting seat and a lifting cylinder 128. Among them, the roller 129 is rotatably connected to the lifting seat; the lifting cylinder 128 is installed on the support 121, and the piston rod is connected to the lifting seat; when it is necessary to flip the card by 180 degrees, the vertical driving mechanism drives the roller 129 to rise, so that one end of the card abuts against the wheel surface of the roller 129, and then driven by the rotation driving mechanism, the card rotates 180 degrees with the wheel surface of the roller 129 as the rotation fulcrum, so as to realize the turning over of the card.

[0063] See Figures 1 - 16 , a limiting component 125 is arranged on the support 121. The limiting component 125 is used to prevent the card from being thrown out due to centrifugal force during flipping. The limiting component 125 includes an arc-shaped limiting plate and baffles arranged on both sides of the arc-shaped limiting plate. Among them, the arc-shaped limiting plate is installed on the support 121 and is located above the flipping seat 1210; during the flipping process of the card, one end (i.e., the inner side) of the card contacts the wheel surface of the roller 129, and the other end (i.e., the outer side) contacts the arc-shaped limiting plate; in this way, it is possible to limit the inner and outer sides of the card, so that the card will not move radially during the flipping process, thereby ensuring the flipping accuracy of the card.

[0064] In this embodiment, the axis direction of the arc-shaped limiting plate coincides with the axis direction of the rotating shaft, and the inner diameter of the arc-shaped limiting plate is equal to the length of the card; in this way, during the flipping process of the card, the outer side of the card can always fit against the inner side of the arc-shaped limiting plate, thereby preventing the card from moving radially; in addition, the baffle is semicircular, and an avoidance hole is arranged at the position where it contacts the belt transmission mechanism 7.

[0065] See Figures 17 - 18 , the frame 1 is provided with a positioning mechanism at the head end of the third card conveying device 103 for positioning the card entering the third card conveying device 103. The positioning mechanism includes a positioning wheel 19 arranged on one side of the frame 1 and a positioning driving mechanism 20 arranged on the other side of the frame 1 for pushing the card towards the positioning wheel 19, wherein,

[0066] The positioning and driving mechanism 20 is disposed opposite to the positioning wheel 19 and is located on both sides of the suction belt 17;

[0067] There are multiple groups of the positioning wheels 19, and the multiple groups of positioning wheels 19 are arranged in sequence along the conveying direction of the cards, and each group of positioning wheels 19 is horizontally rotatably connected to the frame 1;

[0068] The positioning and driving mechanism 20 includes a push rod 202 and a positioning cylinder 201 for pushing the push rod 202 to swing outwards. Wherein, the middle part of the push rod 202 is hinged to the frame 1, and a limit groove is provided at a position corresponding to the upper end of the push rod 202 on the frame 1; the upper part of the push rod 202 is hinged to the frame 1 through a tension spring 203 and extends out of the frame 1 at the upper end, and the elastic force of the tension spring 203 causes the push rod 202 to swing towards the positioning wheel 19; the positioning cylinder 201 is installed on the frame 1, and the telescopic rod of the positioning cylinder 201 contacts the lower end of the push rod 202; the telescopic rod of the positioning cylinder 201 extends out and pushes the lower end of the push rod 202 to cause the upper end of the push rod 202 to swing outwards; when it is necessary to position the card, the telescopic rod of the positioning cylinder 201 retracts, and the upper end of the push rod 202 pushes the card towards the direction of the conveying positioning wheel 19 under the elastic force of the tension spring 203 until the card contacts the wheel surface of the positioning wheel 19 to complete the positioning of the card.

[0069] See Figures 1 - 18 , the production method of the card DOD production line of the present invention includes the following steps:

[0070] Step S1: The card issuing device 2 conveys the card to the conveying plane of the first card conveying device, and the first card conveying device conveys the card to the card pre-processing device in sequence, and the card pre-processing device pre-processes the card;

[0071] Step S2: After the card completes the pre-treatment, the first card conveying device conveys and transfers the card to the second card conveying device 102, and the second card conveying device 102 conveys the card to the plasma surface treatment module 7 in the first card printing device, and the plasma surface treatment module 7 performs corona treatment on the card; after the card completes the corona treatment, the second card conveying device 102 conveys and transfers the card to the third card conveying device 103, and the third card conveying device 103 conveys the card to the inkjet printing module 8; after the inkjet printing is completed, the third card conveying device 103 conveys and transfers the card to the second card conveying device 102 again, and the second card conveying device 102 conveys the card to the UV curing module, the cooling module 9, and the OCR detection module 11 in sequence to complete UV curing, cooling, and OCR detection of the card in sequence; then, the second card conveying device 102 conveys the card to the card flipping module for 180-degree flipping, and after flipping, the second card conveying device 102 continues to convey the card to the plasma surface treatment module 7 in the second card printing device, and the plasma surface treatment module 7 performs corona treatment on the second side of the card;

[0072] Step S3: The second card conveying device 102 conveys and transfers the card that has completed the corona treatment on the second side to the third card conveying device 103, and the third card conveying device 103 conveys the card to the inkjet printing module 8. After the inkjet printing is completed, the third card conveying device 103 conveys and transfers the card to the second card conveying device 102 again, and the second card conveying device 102 conveys the card to the UV curing module, the cooling module 9, and the OCR detection module 11 in sequence to complete UV curing, cooling, and OCR detection of the card in sequence; finally, the second card conveying device 102 conveys the card to the card receiving device 13 to complete card collection.

[0073] Embodiment 2

[0074] See Figure 19 , the difference between this embodiment and Embodiment 1 is that:

[0075] In Embodiment 1, the card issuing device 2 and the card receiving device 13 are horizontally arranged, while in this embodiment, the card issuing device 2 and the card receiving device 13 are vertically arranged, which is beneficial to saving space.

[0076] The above are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A card DOD production line for single-color inkjet printing on cards, comprising a frame, a card feeding device arranged on the frame, a card pre-treatment device, a card inkjet printing device, a card collecting device, and a card conveying device for sequentially conveying the cards sent out by the card feeding device to the card pre-treatment device, the card inkjet printing device, and the card collecting device, characterized in that, the card inkjet printing device includes a first card inkjet printing device and a second card inkjet printing device arranged in sequence; the first card inkjet printing device is used for inkjet printing on the first side of the card; the second card inkjet printing device is used for inkjet printing on the second side of the card; a card turning device for turning the card is arranged between the first card inkjet printing device and the second card inkjet printing device; both the first card inkjet printing device and the second card inkjet printing device include a plasma surface treatment module and an inkjet printing module; the card conveying device includes a first card conveying device, a second card conveying device, and a third card conveying device, wherein, the first card conveying device is used for conveying the card from the card feeding device to the plasma surface treatment module in the first card inkjet printing device; the second card conveying device is respectively arranged between the card pre-treatment device and the plasma surface treatment module in the first card inkjet printing device, between the inkjet printing module in the first card inkjet printing device and the inkjet printing module in the second card inkjet printing device, and between the inkjet printing module in the second card inkjet printing device and the card collecting device; wherein, the second card conveying device includes an O-shaped belt and a second card conveying mechanism for driving the O-shaped belt to move, wherein, there are two groups of O-shaped belts, and the two groups of O-shaped belts are arranged in parallel; the third card conveying device is used for conveying the card to be printed to the inkjet printing module, and the third card conveying device is respectively arranged between the plasma surface treatment module and the inkjet printing module in the first card inkjet printing device, and between the plasma surface treatment module and the inkjet printing module in the second card inkjet printing device; wherein, the third card conveying device includes a suction belt and a third card conveying mechanism for driving the suction belt to move; a negative pressure device is arranged below the suction belt on the frame; a positioning mechanism for positioning the card entering the third card conveying device is arranged at the head end of the third card conveying device on the frame, and the positioning mechanism includes a positioning wheel arranged on one side of the frame and a positioning driving mechanism arranged on the other side of the frame for pushing the card towards the positioning wheel, wherein, the positioning driving mechanism is arranged opposite to the positioning wheel and is located on both sides of the suction belt; there are multiple groups of positioning wheels, and the multiple groups of positioning wheels are arranged in sequence along the conveying direction of the card, and each group of positioning wheels is horizontally rotatably connected to the frame; The positioning and driving mechanism includes a push rod and a positioning cylinder for pushing the push rod to swing outwards. Among them, the middle part of the push rod is hinged to the frame, the upper end of the push rod is hinged to the frame through a tension spring, and the elastic force of the tension spring causes the push rod to swing towards the direction of the positioning wheel; the positioning cylinder is installed on the frame, and the telescopic rod of the positioning cylinder contacts the lower end of the push rod; the telescopic rod of the positioning cylinder extends and pushes the lower end of the push rod to cause the upper end of the push rod to swing outwards; when the card needs to be positioned, the telescopic rod of the positioning cylinder retracts, and the upper end of the push rod pushes the card towards the direction of the conveying and positioning wheel under the elastic force of the tension spring until the card contacts the wheel surface of the positioning wheel.

2. The card DOD production line for single-color inkjet printing of cards according to claim 1, wherein The card pre-processing device includes an OCR recognition module, a magnetic writing module, a personalization processing module, a card turning module, and a waste card collection module arranged in sequence along the conveying direction of the card. Among them, the OCR recognition module is used to recognize the cards issued by the card issuing device; the magnetic writing module is used to write magnetic information on the cards that are correctly recognized in the OCR recognition module; the personalization processing module is used to perform personalization processing on the cards that have completed magnetic writing; the card turning module is used to turn over the cards that have completed personalization processing; and the waste card collection module is used to collect waste cards.

3. The card DOD production line for single-color inkjet printing of cards according to claim 1, characterized in that, The inkjet printing module includes a bracket, a printing module arranged on the bracket, a lifting drive mechanism for driving the printing module to perform vertical lifting, and a longitudinal drive mechanism for driving the printing module to move along a direction perpendicular to the conveying direction of the card; among them, a moisturizing mechanism is arranged at the inkjet printing head of the printing module, the moisturizing mechanism includes a moisturizing box, a moisturizing pad arranged in the moisturizing box, and a moisturizing drive mechanism for driving the moisturizing box to move along a direction perpendicular to the conveying direction of the card. Among them, the number of the moisturizing pads is the same as the number of the inkjet printing heads and they are in one-to-one correspondence.

4. The card DOD production line for single-color inkjet printing on cards according to claim 3, characterized in that, A scraping blade and a scraping drive mechanism for driving the scraping blade to rotate are further arranged on the moisturizing box. Among them, the scraping blade is rotatably connected in the moisturizing box; the scraping drive mechanism is used to drive the scraping blade to rotate so that the scraping blade contacts the inkjet printing head.

5. The card DOD production line for single-color inkjet printing of cards according to claim 1, characterized in that, The card flipping device includes a support, a flipping mechanism disposed within the support, and a rotational drive mechanism for driving the flipping mechanism to rotate. Among them, the flipping mechanism includes flipping seats disposed on both sides of the support; the flipping seats are rotatably connected to the support through a rotating shaft; a groove extending along its length direction is provided on the inner side of the flipping seat; the rotational drive mechanism is used to drive the rotating shafts on the flipping seats on both sides to rotate synchronously; the card flipping device further includes a limiting mechanism for limiting the end of the card during the flipping process of the card, and the limiting mechanism includes a roller and a vertical drive mechanism for driving the roller to move vertically; when it is necessary to flip the card, the vertical drive mechanism drives the roller to rise and causes the wheel surface of the roller to abut against the end of the card; the rotational drive mechanism drives the card to perform a 180-degree flip with the wheel surface of the roller as the rotation fulcrum.

6. The card DOD production line for single-color inkjet printing of cards according to claim 5, characterized in that, A limiting component is provided on the support, and the limiting component is used to prevent the card from being thrown out due to centrifugal force during flipping; the limiting component includes an arc-shaped limiting plate and baffles provided on both sides of the arc-shaped limiting plate. Among them, the arc-shaped limiting plate is installed on the support and is located above the flipping seat; during the flipping process of the card, one end of the card contacts the wheel surface of the roller, and the other end contacts the arc-shaped limiting plate.

7. The card DOD production line for single-color inkjet printing of cards according to claim 6, characterized in that, Both the first card printing device and the second card printing device further include a UV curing module, a cooling module, and an OCR detection module.

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