Card DOD production line for single-color card jet printing

Abstract

The invention discloses a card DOD production line for single-color card jet printing. The card DOD production line comprises a rack, a card issuing device, a card preorder processing device, a card jet printing device, a card collecting device and a card conveying device, a card turnover device is arranged between the first card jet printing device and the second card jet printing device; each of the first card jet printing device and the second card jet printing device comprises a plasma surface treatment module and an ink-jet 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 for conveying a card to be printed into the ink-jet printing module. The third card conveying device comprises an air suction belt and a third card conveying mechanism used for driving the air suction belt to move. According to the card DOD production line, double-sided single-color jet printing can be carried out on the card, and the jet printing efficiency is higher.

Description

Technical Field

[0001] The invention belongs to the field of smart card manufacturing, and in particular relates to a card DOD production line for monochrome card printing. Background Art

[0002] UV printing is usually called DOD printing. With the advantages of safety, environmental protection, beautiful colors and strong adhesion, DOD printing has become more and more popular in the printing industry with the continuous development of technology. At present, it is basically divided into scanning printing method in which the ink is gradually superimposed by multiple reciprocating movements of the nozzle and one-time printing method in which the nozzle is fixed and the material moves. The one-time printing method is more than ten times more efficient than the multiple printing method, but because the clarity of the previous one-time printing method is very different from that of the multiple printing methods, it is rarely used for high-precision and high-definition printing, especially picture printing. Now the quality of one-time printing has been greatly improved. In addition to monochrome printing, multi-nozzle mixing has also been successful in color printing. With the continuous expansion of market usage, the cost of DOD printing, including inkjet printers, has dropped significantly. Its development direction is how to improve the quality and efficiency of printing, save space and labor costs.

[0003] In the multi-color DOD printing process, when a one-time printing method is used, since the same printing point on the printing material needs to be sprayed by multiple nozzles, in order to ensure the clarity of the printing, the movement accuracy of the printing material is very high, making the printing speed relatively slow. In the monochrome printing process, since there is no need for front and back color printing, the requirements for the movement accuracy of the printing material are reduced. The existing color printing method, such as the printing method disclosed in the invention patent application with application publication number CN118386690A, "A high-precision double-sided DOD printing device, method and production line for sheet materials", has low production efficiency. 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 monochrome printing of cards; the card DOD production line can realize double-sided monochrome printing of cards with higher printing efficiency.

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

[0006] A card DOD production line for monochrome card printing comprises a frame, a card issuing device arranged on the frame, a card pre-processing device, a card printing device, a card receiving device, and a card conveying device for conveying the cards issued by the card issuing device to the card pre-processing device, the card printing device and the card receiving device in sequence, wherein:

[0007] The card printing device comprises a first card printing device and a second card printing device arranged in sequence; 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 turning device for turning over the card is arranged between the first card printing device and the second card printing device; the first card printing device and the second card printing device both comprise a plasma surface treatment module and an inkjet printing module;

[0008] The card conveying device includes a first card conveying device, which is used to convey the card to be printed to the inkjet printing module. The first card conveying device includes a suction belt and a third card conveying mechanism for driving the suction belt to move; the frame is provided with a negative pressure device under the suction belt.

[0009] Preferably, the first card printing device and the second card printing device each further include a UV curing module, a cooling module and an OCR detection module; the card conveying device further includes a second card conveying device and a third card conveying device.

[0010] Preferably, the second card conveying device is arranged between the card pre-processing 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 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 the O-shaped belt is divided into two groups, and the two groups of O-shaped belts are arranged in parallel.

[0011] Preferably, the third card conveying device is provided 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.

[0012] Preferably, the frame is provided with a positioning mechanism at the head end of the third card conveying device for positioning the card entering the third card conveying device, and the positioning mechanism includes a positioning wheel provided on one side of the frame and a positioning drive mechanism provided on the other side of the frame for pushing the card toward the positioning wheel, wherein:

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

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

[0015] The positioning drive mechanism includes a push rod and a positioning cylinder for pushing the push rod to swing outward, wherein the middle part of the push rod is hinged on the frame, and the upper end of the push rod is hinged on the frame by a tension spring, and the elastic force of the tension spring causes the push rod to swing toward 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 out and pushes the lower end of the push rod to cause the upper end of the push rod to swing outward; 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 toward the direction of the conveying 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 comprises an OCR recognition module, a magnetic writing module, a personalization processing module, a card flipping module and a waste card collection module which are sequentially arranged along the conveying direction of the card, wherein the OCR recognition module is used to recognize the card issued by the card issuing device; the magnetic writing module is used to write magnetism to the card correctly recognized by the OCR recognition module; the personalization processing module is used to personalize the card after magnetic writing; the card flipping module is used to flip the card after personalization; 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 drive mechanism for driving the printing module to perform vertical lifting and lowering, and a longitudinal drive mechanism for driving the printing module to move along a direction perpendicular to the conveying direction of the card; wherein, a moisturizing mechanism is provided at the inkjet print head of the printing module, and 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, wherein the number of the moisturizing pads is the same as the number of the inkjet print heads, and corresponds one to one.

[0018] Preferably, the moisturizing box is also provided with an ink scraper blade and an ink scraper driving mechanism for driving the ink scraper blade to rotate, wherein the ink scraper blade is rotatably connected inside the moisturizing box; the ink scraper driving mechanism is used to drive the ink scraper blade to rotate so as to cause the ink scraper blade to contact the inkjet print head.

[0019] Preferably, the card flipping device includes a support, a flipping mechanism arranged in the support and a rotary drive mechanism for driving the flipping mechanism to rotate, wherein the flipping mechanism includes flipping seats arranged on both sides of the support; the flipping seats are rotatably connected to the support through a rotating shaft; the inner side of the flipping seat is provided with a groove extending along its length direction; 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 also includes a limiting mechanism for limiting the end of the card during the flipping process, 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 rest against the end of the card; the rotary drive mechanism drives the card to flip 180 degrees with the wheel surface of the roller as the rotation fulcrum.

[0020] Preferably, a limiting assembly is provided on the support, and the limiting assembly is used to prevent the card from being thrown out due to centrifugal force when flipping; the limiting assembly includes an arc-shaped limiting plate and baffles arranged on both sides of the arc-shaped limiting plate, wherein the arc-shaped limiting plate is installed on the support and is located above the flip 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, the axial direction of the arc-shaped limit plate coincides with the axial direction of the rotating shaft; the inner diameter of the arc-shaped limit plate is greater than or equal to the length of the card; and the baffle is semicircular.

[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 monochrome printing on cards. The cards are driven into the inkjet printing module by a suction belt, and negative pressure is generated above the suction module by a negative pressure device, so that the cards are adsorbed on the suction belt to prevent the cards from shifting during the printing process; the suction belt is driven to move continuously by a third card conveying mechanism, so that the cards are continuously conveyed to the inkjet printing module for monochrome printing. In this way, compared with the existing equipment using color printing, the printing efficiency of the card DOD production line of the present invention is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1-Figure 2 It is a structural schematic diagram of the first specific embodiment of the card DOD production line of the present invention from two different perspectives.

[0025] Figure 3 It is a top view of the card DOD production line of the present invention.

[0026] Figure 4 and Figure 5 Schematic diagram of the structure of the inkjet printing module from two different perspectives.

[0027] Figure 6 and Figure 7 Schematic diagram of the structure of the moisturizing mechanism from two different perspectives.

[0028] Figure 8 It is a structural schematic diagram of the ink scraping mechanism.

[0029] Fig. 9 It is a schematic diagram of the structures of the second conveying device and the third conveying device.

[0030] Fig.10 It is a top view of the second conveying device and the third conveying device.

[0031] Fig.11 and Fig.12 Schematic diagram of the structure of the card flipping device from two different perspectives.

[0032] Fig.13 and Fig.14 Schematic diagram of the structure of the card transfer device from two different perspectives (excluding the limit component).

[0033] Fig.15 Schematic diagram of card flipping.

[0034] Fig.16 It is a structural schematic diagram of the driven pulley.

[0035] Fig.17 It is a structural diagram of the positioning mechanism.

[0036] Fig.18 Schematic diagram of positioning the card by the positioning mechanism.

[0037] Fig.19 It is a structural schematic diagram of a second specific embodiment of the card DOD production line of the present invention. DETAILED DESCRIPTION

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

[0039] Example 1

[0040] See also Figure 1-Figure 18 The card DOD production line of the present invention includes a frame 1, a card issuing device 2 arranged 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 conveying cards to the card issuing device 2, the card pre-processing device, the card printing device and the card receiving device 13 in sequence.

[0041] See also Figure 1-Figure 16 The card printing device is divided into a first card printing device and a second card printing device, wherein 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 arranged 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 mold 8, a UV curing module, a cooling module 9 and an OCR detection module 11, wherein the plasma surface treatment module 7, the inkjet printing mold 8, the UV curing module, the cooling module 9 and the OCR detection module 11 are arranged in sequence along the direction of card conveying;

[0042] See also Figure 1-Figure 16 The card conveying device 10 comprises a first card conveying device, a second card conveying device 102 and a third card conveying device 103, wherein:

[0043] The first card conveying 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 conveying device 102 is respectively arranged between the card pre-processing device and the plasma surface processing module 7 in the first card printing device, between the inkjet printing mold 8 in the first card printing device and the inkjet printing mold 8 in the second card printing device, and between the inkjet printing mold 8 in the second card printing device and the card receiving device 13;

[0045] The third card conveying 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 conveying device adopts the existing toothed chain and the corresponding sprocket conveying mechanism, and drives the sprocket to rotate through the driving motor, thereby driving the toothed chain to move, thereby driving 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 flipping module 16 and the waste card collection module 6 in sequence, and finally the card that has completed the previous processing is handed over to the second card conveying device 102;

[0047] The second card conveying device 102 includes an O-shaped belt 18 and a second card conveying mechanism for driving the O-shaped belt 18 to move, wherein the O-shaped belt 18 is divided into two groups, 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 suction belt 17 to move, wherein the frame 1 is provided with a negative pressure device below the suction belt 17 .

[0049] Through the above settings, considering that the position of the card cannot be offset during the inkjet printing process to avoid printing errors, the third card conveying device 103 is used alone in this embodiment to convey the card to the inkjet printing mold 8, and the third card conveying device 103 uses a suction belt 17 as a conveyor belt, and generates negative pressure through a negative pressure device, so that the card is adsorbed on the suction belt 17, thereby avoiding the card from being offset during the inkjet printing process, thereby ensuring the printing accuracy of the card and improving the printing efficiency. In the plasma surface treatment and the subsequent processing steps after inkjet printing, since there will be a lot of heat on the surface of the card in these processes, that is, the surface of the card has a high temperature, the second card conveying device 102 is used alone in this embodiment for conveying, wherein the second card conveying device 102 uses an O-shaped belt 18 as a conveyor belt, and the O-shaped belt 18 has the characteristics of high temperature resistance, and is not easy to deform in the high temperature processing steps, 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, two adjacent groups of card conveying devices 10 can share a group of pulleys. 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, the corresponding driven pulley 15 is provided with a first driving part 151 for installing the suction belt 17 and a second driving part 152 for installing the O-belt 18; in this way, a plurality of groups of card conveying devices 10 can be driven to move synchronously by a group of driving motors, thereby greatly saving costs.

[0051] See also Figure 1-Figure 16The card pre-processing device includes an OCR recognition module 3, a magnetic writing module 4, a personalization processing module 5, a card flipping module 16 and a waste card collection module 6 which are arranged in sequence along the conveying direction of the card, wherein the OCR recognition module 3 is used to recognize the card issued by the card issuing device 2; the magnetic writing module 4 is used to write magnetics on the card correctly recognized by the OCR recognition module 3; the personalization processing module 5 is used to personalize the card after magnetic writing; the card flipping module 16 is used to flip the card after personalization; the waste card collection module 6 is used to collect waste cards, and the waste cards include cards that are not recognized by the OCR recognition module 3 as belonging to the current processing, or cards with defects, or waste cards in the pre-processing process.

[0052] See also Figure 1-Figure 16 The inkjet printing module 8 includes a bracket 801, a printing module 802 arranged on the bracket 801, a lifting driving mechanism for driving the printing module 802 to lift vertically, and a longitudinal driving mechanism for driving the printing module 802 to move along a direction perpendicular to the card conveying direction; wherein

[0053] The lifting drive mechanism and the longitudinal drive mechanism can be driven by a cylinder or by a combination of a motor and a screw drive mechanism;

[0054] A moisturizing mechanism 14 is provided at the inkjet print head of the printing module 802, and the moisturizing mechanism 14 includes a moisturizing box 142, a moisturizing pad 143 provided in the moisturizing box 142, and a moisturizing driving mechanism for driving the moisturizing box 142 to move along a direction perpendicular to the conveying direction of the card, wherein the number of the moisturizing pads 143 is the same as the number of the inkjet print heads, and they correspond one to one; when the printing module 802 is not working, the moisturizing box 142 covers the bottom of the printing module 802, and the moisturizing pad 143 covers the corresponding inkjet print head to moisturize the inkjet print head; when the printing module 802 needs to work, the moisturizing driving mechanism drives the moisturizing box 142 to separate from the printing module 802, so that the inkjet print head in the printing module 802 is separated from the moisturizing pad 143 in the moisturizing box 142;

[0055] In addition, the moisturizing box 142 is also provided with an ink scraper blade 145 and an ink scraper driving mechanism 144 for driving the ink scraper blade 145 to rotate, wherein the ink scraper blade 145 is rotatably connected in the moisturizing box 142; the ink scraper driving mechanism 144 is used to drive the ink scraper blade 145 to rotate so as to cause the ink scraper blade 145 to contact the inkjet print head; at the same time, driven by the moisturizing driving mechanism, the ink scraper blade 145 can scrape ink from the inkjet print head.

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

[0057] See also Figure 1-Figure 16 The card flipping device 12 includes a support 121, a flipping mechanism disposed in the support 121, and a rotation driving mechanism for driving the flipping mechanism to rotate, wherein:

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

[0059] The rotary drive mechanism is used to drive the rotating shafts on the flip seats 1210 on both sides to rotate synchronously, and the rotary drive mechanism includes a rotary motor 122 and a synchronous transmission mechanism; the rotary motor 122 is installed on the support 1; the synchronous transmission mechanism is used to transmit the power of the rotary motor 122 to the rotating shafts in the flip seats 1210 on both sides; the synchronous transmission mechanism includes a transmission shaft 126; the transmission shaft 126 is connected to the main shaft of the rotary motor 122 through a coupling, and the transmission shaft 126 is connected to the rotating shafts on the flip seats 1210 on both sides through a belt transmission mechanism 127; the transmission shaft 126 is driven to rotate by the rotary motor 122, thereby driving the two groups of belt transmission mechanisms 127 to work synchronously, thereby realizing the synchronous rotation of the two groups of flip seats 1210;

[0060] In order to ensure the flipping accuracy, the rotation drive mechanism also 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, wherein the rotating disk 123 is located in the detection port of the sensor 124, and the rotating disk 123 is provided with two groups of notches symmetrically arranged at 180 degrees; 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, and 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 180 degrees.

[0061] Since the card turning device 12 in this embodiment does not need to clamp the card, it does not need to set up a corresponding clamping mechanism, so the structure is simpler and the manufacturing cost is lower.

[0062] See also Figure 1-Figure 16 The card flipping device 12 also includes a limiting mechanism for limiting the end of the card during the flipping process, and 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, wherein the roller 129 is rotatably connected to the lifting seat; the lifting cylinder 128 is installed on the support 1, and the piston rod is connected to the lifting seat; when the card needs to be flipped 180 degrees, the vertical driving mechanism drives the roller 129 to rise, so that one end of the card is pressed against the wheel surface of the roller 129, and then driven by the rotating driving mechanism, the card rotates 180 degrees with the wheel surface of the roller 129 as the rotation fulcrum, thereby realizing the flipping of the card.

[0063] See also Figure 1-Figure 16 A limiting assembly 125 is provided on the support 1, and the limiting assembly 125 is used to prevent the card from being thrown out due to centrifugal force when flipping. The limiting assembly 125 includes an arc-shaped limiting plate and baffles arranged on both sides of the arc-shaped limiting plate, wherein the arc-shaped limiting plate is installed on the support 121 and is located above the flip 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, the inner and outer sides of the card can be limited, 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 axial direction of the arc-shaped limit plate coincides with the axial direction of the rotating shaft, and the inner diameter of the arc-shaped limit 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 be attached to the inner side of the arc-shaped limit plate, so that the card moves radially in this direction; in addition, the baffle is semicircular, and an avoidance hole is provided at the position where it contacts the belt drive mechanism 7.

[0065] See also Figure 17-Figure 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, and the positioning mechanism includes a positioning wheel 19 provided on one side of the frame 1 and a positioning drive mechanism 20 provided on the other side of the frame 1 for pushing the card toward the positioning wheel 19, wherein,

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

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

[0068] The positioning drive mechanism 20 includes a push rod 202 and a positioning cylinder 201 for pushing the push rod 202 to swing outward, wherein the middle part of the push rod 202 is hinged on the frame 1, and the frame 1 is provided with a limiting groove at a position corresponding to the upper end of the push rod 202; the upper part of the push rod 202 is hinged on the frame 1 through a tension spring 203, and the upper end extends out of the frame 1, and the elastic force of the tension spring 203 causes the push rod 202 to swing toward the direction of the positioning wheel 19; the positioning cylinder 201 is arranged Installed on the frame 1, 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 and pushes the lower end of the push rod 202 to cause the upper end of the push rod 202 to swing outward; when the card needs to be positioned, the telescopic rod of the positioning cylinder 201 retracts, and the upper end of the push rod 202 pushes the card toward 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 also Figure 1-Figure 18 The production method of the card DOD production line of the present invention comprises 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 performs pre-processing on the card;

[0071] Step S2: After the card has completed the pre-processing, the first card conveying device conveys the card and hands it over to the second card conveying device 102, which 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 has completed the corona treatment, the second card conveying device 102 conveys the card and hands it over to the third card conveying device 103, which conveys the card to the inkjet printing module 8; after the inkjet printing is completed, the third card conveying device 10 3 The card is then conveyed and handed over to the second card conveying device 102, which conveys the card to the UV curing module, the cooling module 9, and the OCR detection module 11 in sequence, and sequentially completes UV curing, cooling, and OCR detection of the card; 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 the card that has completed the corona treatment on the second side and hands it over to the third card conveying device 103. The third card conveying device 103 conveys the card to the inkjet printing mold 8. After the inkjet printing is completed, the third card conveying device 103 conveys and hands the card over to the second card conveying device 102. 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, and completes UV curing, cooling and OCR detection of the card in sequence; finally, the second card conveying device 102 conveys the card to the card collecting device 13 to complete the card collection.

[0073] Example 2

[0074] See also Fig.19 The difference between this embodiment and embodiment 1 is that:

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

[0076] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A card DOD production line for monochrome card printing, comprising a frame, a card issuing device arranged on the frame, a card pre-processing device, a card printing device, a card receiving device, and a card conveying device for conveying the cards issued by the card issuing device to the card pre-processing device, the card printing device and the card receiving device in sequence, characterized in that: The card printing device comprises a first card printing device and a second card printing device arranged in sequence; 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 turning device for turning over the card is arranged between the first card printing device and the second card printing device; the first card printing device and the second card printing device both comprise a plasma surface treatment module and an inkjet printing module; The card conveying device includes a first card conveying device, which is used to convey the card to be printed to the inkjet printing module. The first card conveying device includes a suction belt and a third card conveying mechanism for driving the suction belt to move; the frame is provided with a negative pressure device under the suction belt.

2. The card DOD production line for card monochrome printing according to claim 1, characterized in that: The second card conveying device is arranged between the card pre-processing device and the plasma surface processing 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 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 the O-shaped belt is divided into two groups, and the two groups of O-shaped belts are arranged in parallel.

3. The card DOD production line for card monochrome printing according to claim 2, characterized in that: The third card conveying device is 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.

4. The card DOD production line for card monochrome printing according to claim 1, characterized in that: The frame is provided with a positioning mechanism at the head end of the third card conveying device for positioning the card entering the third card conveying device, and the positioning mechanism includes a positioning wheel provided on one side of the frame and a positioning drive mechanism provided on the other side of the frame for pushing the card toward the positioning wheel, wherein: The positioning drive mechanism is arranged opposite to the positioning wheel and is located on both sides of the suction belt; The positioning wheels are multiple groups, which are arranged in sequence along the card conveying direction, and each group of positioning wheels is horizontally rotatably connected to the frame; The positioning drive mechanism includes a push rod and a positioning cylinder for pushing the push rod to swing outward, wherein the middle part of the push rod is hinged on the frame, and the upper end of the push rod is hinged on the frame by a tension spring, and the elastic force of the tension spring causes the push rod to swing toward 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 out and pushes the lower end of the push rod to cause the upper end of the push rod to swing outward; 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 toward the direction of the conveying positioning wheel under the elastic force of the tension spring until the card contacts the wheel surface of the positioning wheel.

5. The card DOD production line for card monochrome printing according to claim 1, characterized in that: The card pre-processing device comprises an OCR recognition module, a magnetic writing module, a personalization processing module, a card flipping module and a waste card collection module which are sequentially arranged along the conveying direction of the card, wherein the OCR recognition module is used to recognize the card issued by the card issuing device; the magnetic writing module is used to write magnetics on the card correctly recognized by the OCR recognition module; the personalization processing module is used to personalize the card after magnetic writing; the card flipping module is used to flip the card after personalization; and the waste card collection module is used to collect waste cards.

6. The card DOD production line for card monochrome printing 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 lowering, and a longitudinal drive mechanism for driving the printing module to move along a direction perpendicular to the conveying direction of the card; wherein, a moisturizing mechanism is arranged at the inkjet print head of the printing module, and 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, wherein the number of the moisturizing pads is the same as the number of the inkjet print heads, and corresponds one to one.

7. The card DOD production line for card monochrome printing according to claim 6, characterized in that: The moisturizing box is also provided with an ink scraper and an ink scraper driving mechanism for driving the ink scraper to rotate, wherein the ink scraper is rotatably connected inside the moisturizing box; the ink scraper driving mechanism is used to drive the ink scraper to rotate so as to cause the ink scraper to contact the inkjet print head.

8. The card DOD production line for card monochrome printing according to claim 1, characterized in that: The card flipping device includes a support, a flipping mechanism arranged in the support and a rotating drive mechanism for driving the flipping mechanism to rotate, wherein the flipping mechanism includes a flipping seat arranged on both sides of the support; the flipping seat is rotatably connected to the support through a rotating shaft; the inner side of the flipping seat is provided with a groove extending along its length direction; the rotating drive mechanism is used to drive the rotating shafts on the flipping seats on both sides to rotate synchronously; the card flipping device also includes a limiting mechanism for limiting the end of the card during the flipping process of the card, the limiting mechanism includes a roller and a vertical driving mechanism for driving the roller to move vertically; when the card needs to be flipped, the vertical driving mechanism drives the roller to rise and causes the wheel surface of the roller to rest against the end of the card; the rotating drive mechanism drives the card to flip 180 degrees with the wheel surface of the roller as the rotation fulcrum.

9. The card DOD production line for card monochrome printing according to claim 8, characterized in that: A limiting assembly is provided on the support, and the limiting assembly is used to prevent the card from being thrown out due to centrifugal force when flipping; the limiting assembly includes an arc-shaped limiting plate and baffles arranged on both sides of the arc-shaped limiting plate, wherein the arc-shaped limiting plate is installed on the support and is located above the flip 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.

10. The card DOD production line for card monochrome printing according to claim 9, characterized in that: The first card printing device and the second card printing device both further include a UV curing module, a cooling module and an OCR detection module; the card conveying device further includes a second card conveying device and a third card conveying device.

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