An intelligent card inkjet printing apparatus and method

Abstract

The application discloses an intelligent card ink-jet printing device and method, which comprises a positioning module for positioning the card, a circulating conveying module for conveying the card, an ink-jet printing module for ink-jet printing the card and a turnover module for turning over the card; the positioning module is provided with an unprinted positioning station for positioning the card to be printed and a printed positioning station for positioning the card with one printed side; the circulating conveying module comprises a conveying carrier and a conveying driving mechanism; the conveying carrier is provided with two card placing positions; the turnover module is provided with a single-printing turnover station for turning over the card with one printed side and a full-printing turnover station for turning over the card with two printed sides. The application adopts the same path for the card to move back and forth, and has the advantages of simple structure, low cost, small space occupation and high printing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart card manufacturing, in particular to a smart card inkjet printing device and method. BACKGROUND

[0002] Plastic cards, such as financial cards (including credit cards and debit cards), identification cards, driver's licenses, gift cards, and other plastic cards, can be personalized with the personal information of the intended cardholder. Examples of personalization include, but are not limited to, name, address, photo, account number, employee number, etc. Personal information can be applied in the card in a variety of different ways, including but not limited to, printing on the surface of the document, storing information on a magnetic stripe provided on the card, and storing information on an integrated circuit chip or smart chip embedded in the card.

[0003] Inkjet printing is a transfer process that utilizes an inkjet printhead to print an image onto a card, such as the card printing mechanism with a card return path disclosed in the invention patent with the publication number CN111907220B, in which, after processing at a card processing station on one surface of the card, the card can be recirculated back upstream of the card processing station along a card return travel path, and then the card can be re-introduced into the main card travel path and conveyed a second time through the card processing station. The card can be flipped when it is returned along the card return travel path so that the opposite surface of the card can be processed when it is conveyed back through the card processing station.

[0004] The card printing mechanism described above has the following disadvantages:

[0005] By providing a separate card return path to transport the card with one printed surface back to the upstream of the processing station, and then printing the other surface of the card, not only the structure is complex, the production cost is high, but also the space occupied is large, and the printing efficiency needs to be improved. SUMMARY

[0006] The purpose of the present application is to overcome the above-mentioned problems, and to provide a smart card inkjet printing device, which uses the same path for the card to move back and forth, has the advantages of simple structure, low cost, small space occupation, high printing efficiency, etc.

[0007] Another purpose of the present application is to provide a smart card inkjet printing method.

[0008] The purpose of the present application is achieved by the following technical solutions:

[0009] The application discloses an intelligent card ink-jet printing device, which comprises a positioning module for positioning the card, a circulating conveying module for conveying the card, an ink-jet printing module for ink-jet printing the card and a turnover module for turning over the card; the positioning module, the ink-jet printing module and the turnover module are sequentially arranged.

[0010] The positioning module is provided with an unprinted positioning station for positioning the card to be printed and a printed positioning station for positioning the card with one printed surface.

[0011] The circulating conveying module comprises a conveying carrier for carrying the card and a conveying driving mechanism for driving the conveying carrier to move back and forth between the processing modules; the conveying carrier is provided with two card placing positions for placing the card.

[0012] The turnover module is provided with a single-surface printed turnover station for turning over the card with one printed surface and a full-surface printed turnover station for turning over the card with two printed surfaces.

[0013] In one preferred embodiment of the application, the conveying carrier is a conveying platform, and the conveying platform is provided with a negative pressure hole in the card placing position, and the negative pressure hole is communicated with a negative pressure device through a negative pressure pipeline. Through the above structure, when the card is transferred to the conveying platform, the card is fixed on the conveying platform through the negative pressure effect, so that the correct posture is maintained for the ink-jet printing operation, and the ink-jet printing precision is ensured.

[0014] Further, the conveying driving mechanism comprises a conveying driving motor and a conveying transmission assembly, the conveying transmission assembly comprises a conveying transmission belt and a conveying transmission pulley, and the conveying transmission belt is fixedly connected with the conveying platform.

[0015] In one preferred embodiment of the application, the positioning module comprises a positioning assembly and a positioning driving mechanism; the positioning assembly is provided with two groups and is respectively located at two sides of the intelligent card conveying channel.

[0016] The positioning driving mechanism comprises an opening driving motor for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the positioning assembly and a positioning spring for pulling the positioning assembly to position the intelligent card.

[0017] In one preferred embodiment of the application, each group of the positioning assembly comprises a sliding mounting seat and a positioning wheel, the sliding mounting seat is power-connected with the positioning driving mechanism, and the axis of the positioning wheel extends vertically.

[0018] Further, the positioning wheels of the same group are provided with two rows and are directly or indirectly arranged on the sliding mounting seat of the same group, and each row of positioning wheels is provided with two and arranged along the direction parallel to the smart card conveying channel. Through the above structure, two smart cards can be positioned at the same time, which is suitable for different occasions.

[0019] Further, each positioning assembly further comprises a conveying seat fixedly connected to the corresponding sliding mounting seat, and the conveying seat is provided with a card conveying groove; one row of positioning wheels located upstream is directly or indirectly arranged on the corresponding conveying seat, and part of the wheel surface of the positioning wheel extends into the card conveying groove. Through the above structure, the card to be positioned can be conveyed to the card conveying groove of the conveying seat and then positioned, which is beneficial to smoothly switch the smart card.

[0020] Further, each positioning assembly further comprises a buffering positioning structure, and the buffering positioning structure is provided with two rows and each row is provided with two buffering positioning structures;

[0021] Each buffering positioning structure comprises a buffering positioning swing arm, a buffering spring and a spring mounting plate, one end of the buffering positioning swing arm is directly or indirectly rotatably connected to the sliding mounting seat, the other end of the buffering positioning swing arm is rotatably connected to the corresponding positioning wheel, the spring mounting plate is fixedly arranged, and the two ends of the buffering spring are respectively abutted on the spring mounting plate and the side surface of the buffering positioning swing arm of the same row. Through the above structure, the buffering and self-adaptive positioning functions are provided for the positioning wheel, which can protect the card from being damaged.

[0022] In one preferred scheme of the present application, the opening driving motor is fixedly arranged on a fixed mounting seat, which is fixedly arranged on a transverse guide column; the fixed mounting seat is located between the sliding mounting seats of the two sets of positioning assemblies, which are respectively slidably connected to the transverse guide column; the opening transmission assembly comprises a transmission cam and two transmission rollers, the transmission cam is coaxially connected to the output shaft of the opening driving motor, the transmission rollers are rotatably connected to the sliding mounting seats of the two sets of positioning assemblies, and the wheel surfaces of the two transmission rollers are in contact with the wheel surface of the transmission cam; the two ends of the positioning spring are respectively connected to the sliding mounting seats of the two sets of positioning assemblies. Through the above structure, under the driving of the opening driving motor, the transmission cam rotates, the parts away from the center of the transmission cam are close to the transmission rollers, the two transmission rollers are driven to move outward, thereby driving the two sets of positioning assemblies to move away from the smart card conveying channel, so that the smart card enters or exits; at this time, the positioning spring is elongated and stores energy. When the smart card enters between the two sets of positioning assemblies, the opening driving motor is driven in the opposite direction, so that the parts away from the center of the transmission cam are away from the transmission rollers; at the same time, the positioning spring releases potential energy, pulls the sliding mounting seats of the two sets of positioning assemblies to move close to the smart card, until the positioning wheels of the two sets of positioning assemblies are clamped on the two sides of the smart card, and the smart card is limited in the specified position, thereby completing the positioning work of the smart card.

[0023] In one preferred scheme of the present application, the positioning module further comprises an avoiding lifting driving mechanism for driving the positioning assembly and the positioning driving mechanism to lift, the avoiding lifting driving mechanism comprises an avoiding lifting plate, an avoiding lifting driving motor and an avoiding lifting transmission assembly;

[0024] The avoiding lifting driving motor is fixedly arranged on the positioning rack; the avoiding lifting transmission assembly comprises an eccentric wheel, a transmission bearing and an intermediate mounting disc, the eccentric wheel is coaxially connected to the output shaft of the avoiding lifting driving motor, and an eccentric shaft is arranged on the eccentric wheel; the transmission bearing is arranged on the eccentric shaft, and the intermediate mounting disc is provided with a transmission long circular hole matched with the transmission bearing, and the intermediate mounting disc is fixedly connected with the avoiding lifting plate;

[0025] The positioning assembly and the positioning driving mechanism are arranged on the avoiding lifting plate. Through the above structure, under the driving of the avoiding lifting driving motor, the positioning assembly and the positioning driving mechanism can be lifted to move, so as to avoid the interference of the conveying carrier.

[0026] In one preferred scheme of the present application, the positioning module further comprises a rear end alignment mechanism, which comprises a swing push rod and a swing driving mechanism; the swing driving mechanism comprises a swing driving motor and a transmission shaft, the swing driving motor is connected with the swing push rod through the transmission shaft, the length direction of the swing push rod is perpendicular to the axis of the transmission shaft; the swing plane of the swing push rod is parallel to the smart card conveying channel. Through the above structure, when the smart card returns to the positioning assembly for secondary positioning, the swing driving motor drives the transmission shaft to rotate in the corresponding direction, thereby driving the swing push rod to swing close to the smart card, so that the smart card is aligned downstream, and the smart card can be accurately positioned in the direction parallel to the smart card conveying direction.

[0027] In one preferred scheme of the present application, the positioning module further comprises a positioning detection sensor for detecting the working state of the positioning assembly and a lifting detection sensor for detecting the lifting state of the positioning assembly.

[0028] In one preferred scheme of the present application, the printing module is provided with two groups, one group of the printing module located upstream is used for printing patterns on the card, and one group of the printing module located downstream is used for spraying varnish on the card.

[0029] In one preferred scheme of the present application, the printing module comprises an inkjet printer, an inkjet driving mechanism and a cleaning auxiliary mechanism.

[0030] The inkjet printer comprises a printing shell and a print head, the print head is arranged in the printing shell and the printing surface of the print head is located at the bottom of the printing shell.

[0031] The inkjet driving mechanism comprises a vertical driving mechanism for driving the inkjet printer to move vertically and a horizontal driving mechanism for driving the inkjet printer to move horizontally.

[0032] The cleaning auxiliary mechanism comprises a cleaning protective box, a plurality of elastic sealing strips and a scraping strip; the cleaning protective box is of an open top structure, the plurality of elastic sealing strips are arranged in a circle and the top of the elastic sealing strips is higher than the top of the cleaning protective box; in the cleaning state, the bottom surface of the printing shell is attached to the top of the plurality of elastic sealing strips respectively, and the printing surface of the print head is located between the plurality of elastic sealing strips.

[0033] The scraping strip is horizontally arranged and the top of the scraping strip is higher than the top of the elastic sealing strips, the length direction of the scraping strip is perpendicular to the driving direction of the horizontal driving mechanism; in the driving direction of the horizontal driving mechanism, the length of the scraping strip is greater than the total length of the printing surface of the print head.

[0034] In one preferred scheme of the present application, the cleaning and protecting box comprises four side plates and a bottom plate, the four side plates are sequentially fixedly connected to form a rectangular structure, and the bottom plate is provided with a drainage hole for discharging the collected ink.

[0035] Further, the bottom plate is formed by a top plate of the inkjet printer frame.

[0036] In one preferred scheme of the present application, the elastic sealing strips are arranged in a circle in the inner cavity of the cleaning and protecting box.

[0037] Further, the elastic sealing strips are fixedly connected to the inner wall of the cleaning and protecting box through the mounting plate.

[0038] In one preferred scheme of the present application, the scraping strip is integrally arranged on the top of one of the elastic sealing strips, which is beneficial to simplify the structure.

[0039] In one preferred scheme of the present application, the scraping strip scrapes the printing surface of the printer when the lateral driving mechanism drives the inkjet printer to move back laterally, so that the two operations are completed synchronously and more efficiently.

[0040] In one preferred scheme of the present application, the lateral driving mechanism comprises a lateral moving frame, a lateral driving motor and a lateral transmission assembly, the lateral transmission assembly comprises a lateral transmission screw rod and a lateral transmission screw rod nut, and the lateral transmission screw rod nut is fixedly connected to the lateral moving frame.

[0041] Further, the lateral transmission assembly further comprises a synchronous belt and two synchronous wheels, and the two synchronous wheels are coaxially arranged on the output shaft of the lateral driving motor and the lateral transmission screw rod, respectively. Through the above structure, the lateral driving motor can be arranged above or below the lateral transmission screw rod to form an up-down layout structure, and the space occupied laterally can be reduced.

[0042] Further, the vertical driving mechanism is arranged on the lateral moving frame, and the vertical driving mechanism comprises a vertical moving plate, a vertical driving motor and a vertical transmission assembly, the vertical moving plate is fixedly connected to the inkjet printer, the vertical transmission assembly comprises a vertical transmission screw rod and a vertical transmission screw rod nut, the vertical transmission screw rod is connected to the vertical driving motor through a shaft coupling, and the vertical transmission screw rod nut is fixedly connected to the vertical moving plate. Through the above structure, under the driving of the vertical driving motor, the vertical moving plate drives the inkjet printer to move vertically.

[0043] Further, the lateral moving frame is provided with a vertical guide rod, and the vertical guide rod is connected to the vertical moving plate through a vertical guide sleeve.

[0044] In one preferred embodiment of the present application, the turnover module comprises a card clamping mechanism for clamping the card and a turnover driving mechanism for driving the card clamping mechanism to turn over, and the card clamping mechanism and the turnover driving mechanism are both provided with two groups and arranged along the direction parallel to the card conveying direction.

[0045] The card clamping mechanism comprises two oppositely arranged clamping blocks and a card clamping driving mechanism for driving the two clamping blocks to move close to and away from each other, and the two clamping blocks are respectively slidably connected to one end of a card clamping mounting seat; the card clamping driving mechanism comprises an opening driving electromagnet for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the two clamping blocks, and a clamping spring for driving the two clamping blocks to clamp the card.

[0046] The turnover driving mechanism comprises a turnover driving motor, an output shaft of the turnover driving motor is fixedly connected to the other end of the card clamping mounting seat; the turnover driving motor is provided with a hollow structure; one end of an extension rod of the opening driving electromagnet passes through the hollow structure of the turnover driving motor and is connected to the opening transmission assembly, and the extension rod of the opening driving electromagnet is coaxial with the output shaft of the turnover driving motor.

[0047] In one preferred embodiment of the present application, the opening transmission assembly comprises an opening rotary frame, a wedge-shaped extrusion block and opening transmission wheels; the opening rotary frame is rotationally connected to the card clamping mounting seat, and the opening rotary frame is connected to one end of the extension rod of the opening driving electromagnet through a relatively movable structure, and the other end of the opening rotary frame is fixedly connected to the wedge-shaped extrusion block; the opening transmission wheels are provided with two and are respectively rotationally connected to the two clamping blocks.

[0048] Further, the card clamping mounting seat is provided with spring mounting plates; the clamping springs and the spring mounting plates are both provided with two, and the two ends of the clamping springs are respectively abutted against the spring mounting plates and the clamping blocks; when the wedge-shaped extrusion block extrudes the two opening transmission wheels, the two clamping blocks move away from each other while compressing the corresponding clamping springs.

[0049] Further, the card clamping mounting seat is provided with a card clamping avoiding hole; the clamping blocks are provided with mounting portions, and the mounting portions are rotationally connected to the opening transmission wheels through the card clamping avoiding hole. In this way, the structure can be more simple and compact.

[0050] Further, the relatively movable structure comprises a hinged shaft and a hinged long circular hole, the hinged long circular hole is arranged on one end of the extension rod of the opening driving electromagnet, and the hinged shaft passes through the hinged long circular hole and is connected to the opening rotary frame.

[0051] In one preferred embodiment of the present application, a guide structure is arranged between the clamping block and the clamping seat, which includes a guide rail and a sliding block, the guide rail is fixed on the clamping seat, and the sliding block is fixedly connected with the clamping block.

[0052] In one preferred embodiment of the present application, the turnover module further includes a rotation sensor for detecting the rotation angle.

[0053] In one preferred embodiment of the present application, an upstream card receiving module is further included for transferring the card from other processing modules to the positioning module.

[0054] In one preferred embodiment of the present application, a discharging module is further included for pushing out the double-sided printed card.

[0055] In one preferred embodiment of the present application, a drying module is further included for drying the ink on the card, which is arranged downstream of the inkjet printing module.

[0056] An intelligent card inkjet printing method, comprising the following steps:

[0057] The card to be printed is transported to an unprinted positioning station of the positioning module by the upstream card receiving module, and the card is positioned by the positioning module;

[0058] The positioned card is transferred to one of the card placing positions of the conveying carrier of the circulating conveying module, and the conveying carrier is driven by the conveying driving mechanism to move downward to the inkjet station of the inkjet printing module, and the front surface of the card is inkjet printed by the inkjet printing module;

[0059] The conveying carrier with the card with the printed front surface is driven by the conveying driving mechanism to move downward, and when the card enters the single-printing turnover station of the turnover module, the card is turned over by 180 degrees by the turnover module, and the card is turned over to the other card placing position of the conveying carrier, and at this time, the back surface of the card faces upward;

[0060] The conveying carrier with the card with one printed surface is driven by the conveying driving mechanism to return to the printed positioning station of the positioning module, and at this time, the next card to be printed enters the unprinted positioning station of the positioning station, and the positioning module simultaneously positions the card to be printed and the card with one printed surface;

[0061] After positioning, the card to be printed and the card with one printed surface are transferred to the two card placing positions of the conveying carrier of the circulating conveying module, respectively, and the conveying carrier is driven by the conveying driving mechanism to move downward to the inkjet station of the inkjet printing module, and the front surface of the card to be printed and the back surface of the card with one printed surface are inkjet printed by the inkjet printing module;

[0062] After the printing, the printed card and the double-sided printed card are driven to move down by the conveying driving mechanism, when the printed card enters the single printing turnover position of the turnover module and the double-sided printed card enters the full printing turnover position, the two cards are turned over 180 degrees by the turnover module, so that the printed card is turned over to the other card placing position of the conveying carrier, and the double-sided printed card is turned over to the discharging position of the discharging module;

[0063] The printed card is driven to return to the printed positioning position of the positioning module by the conveying driving mechanism, and the next round of printing operation is performed according to the above operation;

[0064] The double-sided printed card is conveyed down by the discharging module, and the printing operation of the card is completed.

[0065] Compared with the prior art, the present application has the following beneficial effects:

[0066] The inkjet printing equipment of the present application adopts the same circulating conveying module to convey different cards, and completes the printing operation of different surfaces back and forth on the same path, which has the advantages of simple structure, low cost, small space occupation and high printing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0067] Figure 1 It is a schematic diagram of the three-dimensional structure of the smart card inkjet printing equipment of the present application.

[0068] Figures 2-3 It is a schematic diagram of the three-dimensional structure of the two different perspectives of the positioning module of the present application.

[0069] Figure 4 It is a schematic diagram of the three-dimensional structure of the positioning assembly and the positioning driving mechanism of the positioning module of the present application.

[0070] Figure 5 It is a schematic diagram of the three-dimensional structure of the avoidance lifting driving mechanism of the positioning module of the present application.

[0071] Figure 6 It is a side view of the printing module of the present application.

[0072] Figures 7-8 It is a schematic diagram of the three-dimensional structure of the two different perspectives of the printing module of the present application.

[0073] Figure 9 It is a schematic diagram of the three-dimensional structure of the cleaning and cleaning auxiliary mechanism of the printing module of the present application.

[0074] Figures 10-11 It is a side view of the two different working states of the cleaning and cleaning auxiliary mechanism of the printing module of the present application.

[0075] Figures 12-13 is a perspective view of the flip module of the present application from two different angles.

[0076] Figure 14 is a side view of the flip module of the present application.

[0077] Figures 15-22 is a diagram of multiple different working states of the smart card inkjet printing device of the present application. DETAILED DESCRIPTION

[0078] In order for those skilled in the art to have a better understanding of the technical solutions of the present application, the present application will be further described below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present application are not limited thereto.

[0079] Referring to Figure 1 The smart card inkjet printing device of the present embodiment comprises an upstream card receiving module A for transferring cards from other processing modules, a positioning module B for positioning cards, a circulating conveying module C for conveying cards, an inkjet printing module D for inkjet printing on cards, a drying module E for drying ink on cards, a flip module F for flipping cards, and a discharging module G for pushing out double-sided printed cards; the upstream card receiving module A, the positioning module B, the inkjet printing module D, the drying module E, the flip module F, and the discharging module G are sequentially arranged.

[0080] Referring to Figures 2-4 The positioning module B comprises positioning assemblies, a positioning driving mechanism, and an avoidance lifting driving mechanism for driving the positioning assemblies and the positioning driving mechanism to lift, and two sets of positioning assemblies are arranged on both sides of the smart card conveying channel; each set of positioning assemblies comprises a sliding mounting seat 1b and a positioning wheel 2b, and the sliding mounting seat 1b is power-connected with the positioning driving mechanism; the axis of the positioning wheel 2b extends vertically.

[0081] Further, the positioning wheels 2b of the same set are arranged in two rows and are directly or indirectly arranged on the sliding mounting seat 1b of the same set, and each row of positioning wheels 2b is arranged in two and arranged along the direction parallel to the smart card conveying channel. Through the above structure, two smart cards can be positioned at the same time, which is suitable for different occasions.

[0082] Further, each set of positioning assembly further comprises a conveying seat 3b fixedly connected on the corresponding sliding mounting seat 1b, and a card conveying groove 3-1b is arranged on the conveying seat 3b; one positioning wheel 2b located at the upstream is directly or indirectly arranged on the corresponding conveying seat 3b, and a partial wheel surface of the positioning wheel 2b extends into the card conveying groove 3-1b. Through the above structure, the card to be positioned can be conveyed to the card conveying groove 3-1b of the conveying seat 3b, and then positioned, which is beneficial to smoothly switch the smart card.

[0083] Further, each set of positioning assembly further comprises a buffering positioning structure, and the buffering positioning structure is provided with two groups, and each group is provided with two buffering positioning structures; each buffering positioning structure comprises a buffering positioning swing arm 4b, a buffering spring (not shown in the figure) and a spring mounting plate 5b, one end of the buffering positioning swing arm 4b is directly or indirectly rotationally connected on the sliding mounting seat 1b, and the other end of the buffering positioning swing arm 4b is rotationally connected with the corresponding positioning wheel 2b; the spring mounting plate 5b is fixedly arranged; and two ends of the buffering spring are respectively abutted on the spring mounting plate 5b and the side surface of the buffering positioning swing arm 4b of the same group. Through the above structure, the buffering and self-adaptive positioning functions are provided for the positioning wheel 2b, and the card can be protected from being damaged by collision.

[0084] Referring to Figures 2-4, the positioning driving mechanism comprises an opening driving motor 7b for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the positioning assembly, and a positioning spring 8b for pulling the positioning assembly to position the smart card. Wherein, the opening driving motor 7b is fixedly arranged on a fixed mounting seat 9b, which is fixedly arranged on the transverse guide column; the fixed mounting seat 9b is located between the sliding mounting seats 1b of the two sets of positioning assemblies, and the sliding mounting seats 1b of the two sets of positioning assemblies are respectively slidably connected to the transverse guide column; the opening transmission assembly comprises a transmission cam 10b and a transmission roller 11b, the transmission cam 10b is coaxially connected with the output shaft of the opening driving motor 7b, and the transmission roller 11b is provided with two and is respectively rotatably connected to the sliding mounting seats 1b of the two sets of positioning assemblies, the wheel surfaces of the two transmission rollers 11b are in close contact with the wheel surface of the transmission roller 11b; the two ends of the positioning spring 8b are respectively connected with the sliding mounting seats 1b of the two sets of positioning assemblies. Through the above structure, under the driving of the opening driving motor 7b, the transmission cam 10b rotates, so that the part away from the center of the circle is close to the transmission roller 11b, which promotes the two transmission rollers 11b to move outward, thereby driving the two sets of positioning assemblies to move away from the smart card conveying channel synchronously, so that the smart card enters or exits; at this time, the positioning spring 8b is elongated and stores energy. When the smart card enters between the two sets of positioning assemblies, the opening driving motor 7b is driven in the opposite direction, so that the part away from the center of the transmission cam 10b is away from the transmission roller 11b; at the same time, the positioning spring 8b releases potential energy, pulls the sliding mounting seats 1b of the two sets of positioning assemblies to move close to the smart card synchronously, until the positioning wheels 2b of the two sets of positioning assemblies are respectively clamped on the two side surfaces of the smart card, the smart card is limited on the specified position, thereby completing the positioning work of the smart card.

[0085] Referring to Figure 5 , the avoiding lifting driving mechanism comprises an avoiding lifting plate 12b, an avoiding lifting driving motor 13b and an avoiding lifting transmission assembly; the avoiding lifting driving motor 13b is fixedly arranged on a positioning rack 14b; the avoiding lifting transmission assembly comprises an eccentric wheel 15b, a transmission bearing 16b and an intermediate mounting disc 17b, the eccentric wheel 15b is coaxially connected with the output shaft of the avoiding lifting driving motor 13b, and the eccentric wheel 15b is provided with an eccentric shaft; the transmission bearing 16b is arranged on the eccentric shaft, and the intermediate mounting disc 17b is provided with a transmission long circular hole 17-1b matched with the transmission bearing 16b, and the intermediate mounting disc 17b is fixedly connected with the avoiding lifting plate 12b; the positioning assembly and the positioning driving mechanism are arranged on the avoiding lifting plate 12b. Through the above structure, under the driving of the avoiding lifting driving motor 13b, the positioning assembly and the positioning driving mechanism can move up to avoid the approaching of the conveying platform 1c of the circulating conveying module C, thereby preventing interference.

[0086] Referring toFigures 2-4 The embodiment also comprises a rear end straightening mechanism, which comprises a swing push rod 18b and a swing driving mechanism; the swing driving mechanism comprises a swing driving motor 19b and a transmission shaft 20b, the swing driving motor 19b is connected with the swing push rod 18b through the transmission shaft 20b, the length direction of the swing push rod 18b is perpendicular to the axis of the transmission shaft 20b, and the swing plane of the swing push rod 18b is parallel to the smart card conveying channel. Through the above structure, when the smart card returns to the positioning assembly for secondary positioning, the swing driving motor 19b drives the transmission shaft 20b to rotate in the corresponding direction, thereby driving the swing push rod 18b to swing close to the smart card, so as to straighten the smart card downstream, so that the smart card can also be accurately positioned in the direction parallel to the smart card conveying direction.

[0087] Referring to Figures 2-3 The embodiment also comprises a positioning detection sensor 21b for detecting the working state of the positioning assembly and a lifting detection sensor 22 for detecting the lifting state of the positioning assembly.

[0088] Referring to Figures 2-4 The working principle of the positioning module of the embodiment is as follows:

[0089] When working, before the card moves to between the positioning assemblies, the opening driving motor 7b drives the lower transmission cam 10b to rotate, so that the part of the transmission cam 10b away from the center is close to the transmission roller 11b, the two transmission rollers 11b are driven to move outward, thereby driving the two sets of positioning assemblies to move away from the smart card conveying channel synchronously, so that the smart card enters or exits; at this time, the positioning spring 8b is elongated and stored.

[0090] When the upstream card receiving module A pushes the card into between the positioning assemblies, the opening driving motor 7b drives in the opposite direction, so that the part of the transmission cam 10b away from the center is away from the transmission roller 11b; at the same time, the positioning spring 8b releases potential energy, pulls the sliding mounting seat 1b of the two sets of positioning assemblies to move close to the smart card synchronously, until the positioning wheels 2b of the two sets of positioning assemblies are clamped on the two sides of the smart card respectively, the smart card is limited in the specified position, thereby completing the positioning work of the smart card.

[0091] Referring to Figure 1The circulating conveying module C comprises a conveying carrier for carrying the card and a conveying driving mechanism for driving the conveying carrier to move back and forth between the plurality of processing modules; the conveying carrier is provided with two card placing positions for placing the card; wherein the conveying carrier is a conveying platform 1c, and the card placing position of the conveying platform 1c is provided with a negative pressure hole which is communicated with a negative pressure device through a negative pressure pipeline. Through the above structure, when the card is transferred to the conveying platform 1c, the card is fixed on the conveying platform 1c through the negative pressure effect, so as to keep the correct posture for the inkjet printing operation and ensure the inkjet printing precision.

[0092] Further, the conveying driving mechanism comprises a conveying driving motor and a conveying transmission assembly, and the conveying transmission assembly comprises a conveying transmission belt and a conveying transmission pulley, and the conveying transmission belt is fixedly connected with the conveying platform 1c.

[0093] Referring to Figure 1 The inkjet printing module D is provided with two groups, one group of inkjet printing module D located upstream is used for inkjet printing pattern on the card, and one group of inkjet printing module D located downstream is used for inkjet printing varnish on the card.

[0094] Referring to Figures 6-8 The inkjet printing module D comprises an inkjet printer frame 1d, an inkjet printer, an inkjet driving mechanism and a cleaning auxiliary mechanism; the inkjet printer comprises a printing shell 2d and a print head 3d, the print head 3d is arranged in the printing shell 2d and the printing surface of the print head 3d is located at the bottom of the printing shell 2d; the inkjet driving mechanism comprises a vertical driving mechanism for driving the inkjet printer to move vertically and a horizontal driving mechanism for driving the inkjet printer to move horizontally.

[0095] Referring to Figures 9-11 The cleaning auxiliary mechanism comprises a cleaning protective box 4d, a plurality of elastic sealing strips 5d and a scraping strip 6d; the cleaning protective box 4d is of an open top structure, the elastic sealing strips 5d are provided with a plurality of and surround a circle, and the top of the elastic sealing strips 5d is higher than the top of the cleaning protective box 4d; in the cleaning state, the bottom surface of the printing shell 2d is respectively attached to the top of the plurality of elastic sealing strips 5d, and the printing surface of the print head 3d is located between the plurality of elastic sealing strips 5d; the scraping strip 6d is horizontally arranged and the top of the scraping strip 6d is higher than the top of the elastic sealing strips 5d, and the length direction of the scraping strip 6d is perpendicular to the driving direction of the horizontal driving mechanism; in the driving direction of the horizontal driving mechanism, the length of the scraping strip 6d is greater than the total length of the printing surface of the print head 3d.

[0096] Referring to Figures 9-11The cleaning and protecting box 4d comprises four side plates and a bottom plate, the four side plates are fixedly connected in sequence to form a rectangular structure, and the bottom plate is provided with a drainage hole for discharging the collected ink.

[0097] Further, the bottom plate is formed by the top plate of the inkjet printer frame 1d.

[0098] Referring to Figures 9-11 The elastic sealing strips 5d are located in the inner cavity of the cleaning and protecting box 4d and enclose a circle.

[0099] Further, the plurality of elastic sealing strips 5d are fixedly connected with the inner wall of the cleaning and protecting box 4d through the mounting plate 7d.

[0100] Referring to Figures 9-11 The scraping strip 6d is integrally arranged on the top of one of the elastic sealing strips 5d, which is beneficial to simplify the structure.

[0101] Referring to Figures 9-11 The scraping strip 6d scrapes the printing surface of the printer when the lateral driving mechanism drives the inkjet printer to move back laterally, so that the two operations are completed synchronously and more efficiently.

[0102] Referring to Figures 6-8 The lateral driving mechanism comprises a lateral moving frame 8d, a lateral driving motor 9d and a lateral transmission assembly, the lateral transmission assembly comprises a lateral transmission screw rod and a lateral transmission screw rod nut, and the lateral transmission screw rod nut is fixedly connected with the lateral moving frame 8d.

[0103] Further, the lateral transmission assembly further comprises a synchronous belt and two synchronous wheels, the two synchronous wheels are coaxially arranged on the output shaft of the lateral driving motor 9d and the lateral transmission screw rod respectively. Through the above structure, the lateral driving motor 9d can be arranged above or below the lateral transmission screw rod to form an up-down layout structure, and the space occupied laterally can be reduced.

[0104] Further, the vertical driving mechanism is arranged on the lateral moving frame 8d, the vertical driving mechanism comprises a vertical moving plate 10d, a vertical driving motor 11d and a vertical transmission assembly, the vertical moving plate 10d is fixedly connected with the inkjet printer; the vertical transmission assembly comprises a vertical transmission screw rod and a vertical transmission screw rod nut, the vertical transmission screw rod is connected with the vertical driving motor 11d through a shaft coupling, and the vertical transmission screw rod nut is fixedly connected with the vertical moving plate 10d. Through the above structure, under the driving of the vertical driving motor 11d, the vertical moving plate 10d drives the inkjet printer to move vertically.

[0105] Further, the lateral moving frame 8d is provided with a vertical guide rod 12d, which is connected with the vertical moving plate 10d through a vertical guide sleeve 13d.

[0106] Referring to Figures 6-11 The working principle of the printing module of the embodiment is as follows:

[0107] During operation, the inkjet printer is first driven by the vertical driving mechanism and the lateral driving mechanism to move to the position directly above the cleaning protection box 4d, and then the inkjet printer is driven by the vertical driving mechanism to move downward until the bottom surface of the printing shell 2d is attached to the top of the plurality of elastic sealing strips 5d and the scraping strip 6d, as shown in Figure 10 At this time, the printing surface of the print head 3d is located between the plurality of elastic sealing strips 5d, and the lower area of the printing surface is surrounded by the cleaning protection box 4d and the elastic sealing strips 5d; the internal nozzle is cleaned and moisturized by the print head 3d to spray pulse ink, at this time, the cleaning protection box 4d and the elastic sealing strips 5d are used for protection to prevent the ink from splashing to other devices and modules around; when the cleaning or moisturizing is completed, the inkjet printer is driven by the vertical driving mechanism to move upward by a small distance, so that the bottom surface of the printing shell 2d is away from the top of the plurality of elastic sealing strips 5d but is still attached to the top of the scraping strip 6d, and then the inkjet printer is driven by the lateral driving mechanism to move laterally, so that the residual ink on the printing surface of the print head 3d is scraped off by the scraping strip 6d, as shown in Figure 11 The cleaning work of the print head 3d is completed.

[0108] Referring to Figures 12-14 The turnover module F comprises a card clamping mechanism for clamping a card and a turnover driving mechanism for driving the card clamping mechanism to turn over, and the card clamping mechanism and the turnover driving mechanism are both provided with two groups and arranged along the direction parallel to the card conveying; the card clamping mechanism comprises two oppositely arranged clamping blocks 1f and a clamping driving mechanism for driving the two clamping blocks 1f to move close to and away from each other; the two clamping blocks 1f are respectively slidably connected to one end of a clamping mounting seat 2f; the clamping driving mechanism comprises an opening driving electromagnet 3f for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the two clamping blocks 1f, and a clamping spring 4f for driving the two clamping blocks 1f to clamp the card.

[0109] Referring to Figures 12-14The opening transmission assembly comprises an opening rotating frame 5f, a wedge-shaped extrusion block 6f and an opening transmission wheel 7f; the opening rotating frame 5f is rotationally connected to the clamping mounting seat 2f, and the opening rotating frame 5f is connected to one end of the telescopic rod 3-1f of the opening driving electromagnet 3f through a relatively movable structure, with the other end of the opening rotating frame 5f being fixedly connected to the wedge-shaped extrusion block 6f; the opening transmission wheel 7f is provided with two opening transmission wheels 7f which are rotationally connected to two clamping blocks 1f respectively.

[0110] Further, the clamping mounting seat 2f is provided with a spring mounting plate 8f; the clamping spring 4f and the spring mounting plate 8f are both provided with two clamping springs 4f and spring mounting plates 8f, and the two ends of the clamping spring 4f are abuttingly arranged on the spring mounting plate 8f and the clamping block 1f respectively; when the wedge-shaped extrusion block 6f extrudes the two opening transmission wheels 7f, the two clamping blocks 1f are away from each other while compressing the corresponding clamping springs 4f.

[0111] Further, the clamping mounting seat 2f is provided with a clamping avoiding hole; the clamping block 1f is provided with a mounting portion which is rotationally connected to the opening transmission wheel 7f through the clamping avoiding hole. In this way, the structure can be more simple and compact.

[0112] Further, the relatively movable structure comprises a hinged shaft and a hinged long circular hole, the hinged long circular hole is arranged on one end of the telescopic rod 3-1f of the opening driving electromagnet 3f, and the hinged shaft is connected to the opening rotating frame 5f through the hinged long circular hole.

[0113] Referring to Figures 12-14 The clamping block 1f and the clamping mounting seat 2f are provided with a guide structure, the guide structure comprises a guide rail and a sliding block 9f, the guide rail is fixedly arranged on the clamping mounting seat 2f, and the sliding block 9f is fixedly connected to the clamping block 1f.

[0114] Referring to Figures 12-14 The turnover driving mechanism comprises a turnover driving motor 10f, and an output shaft of the turnover driving motor 10f is fixedly connected to the other end of the clamping mounting seat 2f; the turnover driving motor 10f is provided with a hollow structure; one end of the telescopic rod 3-1f of the opening driving electromagnet 3f is connected to the opening transmission assembly through the hollow structure of the turnover driving motor 10f, and the telescopic rod 3-1f of the opening driving electromagnet 3f is coaxial with the output shaft of the turnover driving motor 10f.

[0115] Referring to Figures 12-14 The embodiment further comprises a rotation sensor 11f for detecting the rotation angle.

[0116] Referring to Figures 12-14 The working principle of the turnover module of the embodiment is as follows:

[0117] When working, before the card conveying reaches, the opening rotary frame 5f is rotated in the corresponding direction by opening the telescopic rod 3-1f of the driving electromagnet 3f, and then the wedge-shaped extrusion block 6f connected to the other end of the opening rotary frame 5f is driven to move close to the two opening transmission wheels 7f, and then the opening transmission wheels 7f are extruded in the middle of the two opening transmission wheels 7f, so that the two opening transmission wheels 7f move away from each other with the corresponding clamping blocks 1f, thereby forming a clamping space; at this time, with the two clamping blocks 1f moving away from each other, the corresponding clamping springs 4f are gradually compressed, so that the clamping springs 4f store energy.

[0118] Referring to Figure 1 and Figures 15-22 , the smart card inkjet printing method of the embodiment comprises the following steps:

[0119] The card to be printed is conveyed to the unprinted positioning station b-1 of the positioning module B by the upstream card receiving module A, and the positioning module B is provided with the unprinted positioning station b-1 for positioning the card to be printed and the printed positioning station b-2 for positioning the card printed on one side; the positioning in the direction parallel to the smart card conveying direction is completed by the upstream card receiving module A, and then the positioning module B positions the card in the direction perpendicular to the smart card conveying direction, such as Figure 15 .

[0120] The positioned card is transferred to one of the card placing positions of the conveying platform 1c of the circulating conveying module C, and the conveying platform 1c is driven to move down to the inkjet station in the printing module D by the conveying driving mechanism, and the front surface of the card is printed by the printing module D, such as Figure 16 .

[0121] The conveying platform 1c with the card printed on the front surface is driven to move down by the conveying driving mechanism, and when the card enters the single printing and turning station f-1 of the turning module F, such as Figure 17 , the card is turned over 180 degrees by the turning module F, and at the same time, the card is turned to the other card placing position of the conveying platform 1c, such as Figure 18 , at this time, the back surface of the card faces upward; the turning module F is provided with the single printing and turning station f-1 for turning the card printed on one side and the full printing and turning station f-2 for turning the card printed on both sides.

[0122] The conveying platform 1c with the printed card is driven by the conveying driving mechanism to return to the printed positioning station b-2 of the positioning module B, and the next card to be printed enters the unprinted positioning station b-1 of the positioning station at the same time, and the positioning module B simultaneously positions the card to be printed and the printed card, as shown in Figure 19 .

[0123] After positioning, the card to be printed and the printed card are transferred to two card placing positions of the conveying platform 1c of the circulating conveying module C respectively; the conveying platform 1c is driven by the conveying driving mechanism to move downwards to the inkjet station in the inkjet module D, and the inkjet module D performs inkjet printing on the front of the card to be printed and the back of the printed card, as shown in Figure 20 .

[0124] After inkjet printing, the conveying platform 1c with the printed card and the double-sided printed card is driven by the conveying driving mechanism to move downwards, and when the printed card enters the single-printing turnover station f-1 of the turnover module F and the double-sided printed card enters the full-printing turnover station f-2, as shown in Figure 21 , the two cards are turned over by 180 degrees by the turnover module F, so that the printed card is turned over to the other card placing position of the conveying platform 1c, and the double-sided printed card is turned over to the unloading station of the unloading module G, as shown in Figure 22 .

[0125] The printed card is driven by the conveying driving mechanism to return to the printed positioning station b-2 of the positioning module B, and the next round of inkjet printing operation is performed according to the above operation.

[0126] The double-sided printed card is conveyed downwards by the unloading module G, and the inkjet printing operation of the card is completed.

[0127] The above is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above content, and any change, modification, substitution, combination, simplification made without departing from the spirit and principle of the present application should be an equivalent replacement method, which is included in the protection scope of the present application.

Claims

1. An inkjet printing apparatus for smart cards, characterized in that, The positioning module, the circulating conveying module, the inkjet printing module and the turnover module are sequentially arranged; The positioning module is provided with an unprinted positioning station for positioning the card to be printed and a printed positioning station for positioning the card with one side printed; The circulating conveying module comprises a conveying carrier for carrying the card and a conveying driving mechanism for driving the conveying carrier to move back and forth between the plurality of processing modules; the conveying carrier is provided with two card placing positions for placing the card; The turnover module is provided with a single-printing turnover station for turning over the card with one side printed and a full-printing turnover station for turning over the card with both sides printed; The positioning module comprises a positioning assembly and a positioning driving mechanism; the positioning assembly is provided with two groups and is located at two sides of the smart card conveying channel respectively; the positioning driving mechanism comprises an opening driving motor for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the positioning assembly and a positioning spring for pulling the positioning assembly to position the smart card; Each group of the positioning assembly comprises a sliding mounting seat and a positioning wheel; the sliding mounting seat is power-connected with the positioning driving mechanism; the axis of the positioning wheel extends vertically; the positioning wheels of the same group are provided with two rows and are directly or indirectly arranged on the sliding mounting seat of the same group; each row of the positioning wheels is provided with two and is arranged along the direction parallel to the smart card conveying channel; one group of the positioning assembly further comprises a buffer positioning structure; the buffer positioning structure is provided with two rows and each row is provided with two buffer positioning structures; each buffer positioning structure comprises a buffer positioning swing arm, a buffer spring and a spring mounting plate; one end of the buffer positioning swing arm is directly or indirectly rotationally connected with the sliding mounting seat; the other end of the buffer positioning swing arm is rotationally connected with the corresponding positioning wheel; the spring mounting plate is fixedly arranged; the two ends of the buffer spring are respectively abutted against the spring mounting plate and the side surface of the buffer positioning swing arm of the same row; The opening driving motor is fixedly arranged on a fixed mounting seat, which is fixedly arranged on a transverse guide column; the fixed mounting seat is located between the sliding mounting seats of the two groups of the positioning assembly; the sliding mounting seats of the two groups of the positioning assembly are respectively slidingly connected with the transverse guide column; the opening transmission assembly comprises a transmission cam and a transmission roller; the transmission cam is coaxially connected with the output shaft of the opening driving motor; the transmission roller is provided with two and is rotationally connected with the sliding mounting seats of the two groups of the positioning assembly; the wheel surfaces of the two transmission rollers are in contact with the wheel surface of the transmission cam; the two ends of the positioning spring are respectively connected with the sliding mounting seats of the two groups of the positioning assembly.

2. The smart card inkjet printing apparatus of claim 1, wherein, The conveying carrier is a conveying platform; the card placing position of the conveying platform is provided with a negative pressure hole, which is communicated with a negative pressure device through a negative pressure pipeline.

3. The smart card inkjet printing apparatus of claim 1, wherein, The inkjet printing module comprises an inkjet printer, an inkjet driving mechanism and a cleaning auxiliary mechanism. The inkjet printer comprises a printing shell and a printing head, the printing head is arranged in the printing shell and a printing surface of the printing head is located at a bottom of the printing shell; The inkjet driving mechanism comprises a vertical driving mechanism for driving the inkjet printer to move vertically and a horizontal driving mechanism for driving the inkjet printer to move horizontally; The cleaning and washing auxiliary mechanism comprises a cleaning and washing protective box, a plurality of elastic sealing strips and a scraping strip; the cleaning and washing protective box is of an open top structure, the plurality of elastic sealing strips are arranged in a circle and the top of the elastic sealing strips is higher than the top of the cleaning and washing protective box; in the cleaning state, the bottom surface of the printing shell is in contact with the top of the plurality of elastic sealing strips respectively and the printing surface of the printing head is located between the plurality of elastic sealing strips; The scraping strip is horizontally arranged and the top of the scraping strip is higher than the top of the elastic sealing strips, the length direction of the scraping strip is perpendicular to the driving direction of the horizontal driving mechanism and the length of the scraping strip is greater than the total length of the printing surface of the printing head in the driving direction of the horizontal driving mechanism.

4. The smart card inkjet printing apparatus of claim 3, wherein, The cleaning and washing protective box comprises four side plates and a bottom plate, the four side plates are sequentially and fixedly connected in a head-tail manner to form a rectangular structure and the bottom plate is provided with a drainage hole for draining the collected ink; The elastic sealing strips are arranged in the inner cavity of the cleaning and washing protective box in a circle and the plurality of elastic sealing strips are fixedly connected to the inner wall of the cleaning and washing protective box through mounting plates; the scraping strip is integrally arranged at the top of one of the elastic sealing strips.

5. The smart card inkjet printing apparatus of claim 1, wherein, The turnover module comprises a card clamping mechanism for clamping the card and a turnover driving mechanism for driving the card clamping mechanism to turn over, the card clamping mechanism and the turnover driving mechanism are both provided with two groups and are arranged along the direction parallel to the card conveying; The card clamping mechanism comprises two oppositely arranged clamping blocks and a card clamping driving mechanism for driving the two clamping blocks to move close to and away from each other, the two clamping blocks are respectively slidably connected to one end of a card clamping mounting seat; the card clamping driving mechanism comprises an opening driving electromagnet for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the two clamping blocks and a clamping spring for clamping the card by the two clamping blocks; The turnover driving mechanism comprises a turnover driving motor, an output shaft of the turnover driving motor is fixedly connected to the other end of the card clamping mounting seat; the turnover driving motor is provided with a hollow structure; one end of an extension rod of the opening driving electromagnet passes through the hollow structure of the turnover driving motor and is connected to the opening transmission assembly, the extension rod of the opening driving electromagnet is coaxial with the output shaft of the turnover driving motor.

6. The smart card inkjet printing apparatus of claim 5, wherein, The opening transmission assembly comprises an opening rotary frame, a wedge-shaped extrusion block and an opening transmission wheel; the opening rotary frame is rotationally connected to the card clamping mounting seat, the opening rotary frame is connected to one end of the extension rod of the opening driving electromagnet through a relatively movable structure and the other end of the opening rotary frame is fixedly connected to the wedge-shaped extrusion block, the opening transmission wheel is provided with two and is rotationally connected to the two clamping blocks respectively. The spring mounting plate is arranged on the clamping mounting seat; the clamping spring and the spring mounting plate are both provided with two, and the two ends of the clamping spring are respectively abutted on the spring mounting plate and the clamping block; when the wedge-shaped extruding block extrudes the two opening transmission wheels, the two clamping blocks are away from each other and simultaneously compress the corresponding clamping springs.

7. A method for use in an inkjet printing apparatus for smart cards as claimed in any one of claims 1 to 6, characterized in that, The method comprises the following steps: The card to be printed is transported to the unprinted positioning station of the positioning module by the upstream card clamping module, and the card is positioned by the positioning module; The positioned card is transferred to one of the card placing positions of the conveying bearing of the circulating conveying module, and the conveying bearing is driven to move downward to the inkjet station in the inkjet module by the conveying drive mechanism, and the front surface of the card is inkjet printed by the inkjet module; The conveying bearing with the card with the printed front surface is driven to move downward by the conveying drive mechanism, and when the card enters the single-printing and turning station of the turning module, the card is turned over by 180 degrees by the turning module, and the card is turned to the other card placing position of the conveying bearing, and the back surface of the card faces upward at this time; The conveying bearing with the card with one printed surface is driven to return to the printed positioning station of the positioning module by the conveying drive mechanism, and the next card to be printed enters the unprinted positioning station of the positioning module at this time, and the card to be printed and the card with one printed surface are positioned by the positioning module at the same time; The card to be printed and the card with one printed surface are transferred to the two card placing positions of the conveying bearing of the circulating conveying module after positioning, and the conveying bearing is driven to move downward to the inkjet station in the inkjet module by the conveying drive mechanism, and the front surface of the card to be printed and the back surface of the card with one printed surface are inkjet printed by the inkjet module; The conveying bearing with the card with one printed surface and the card with double printed surfaces is driven to move downward by the conveying drive mechanism after inkjet printing, and when the card with one printed surface enters the single-printing and turning station of the turning module and the card with double printed surfaces enters the full-printing and turning station, the two cards are turned over by 180 degrees by the turning module, so that the card with one printed surface is turned to the other card placing position of the conveying bearing, and the card with double printed surfaces is turned to the discharging station of the discharging module; The card with one printed surface is driven to return to the printed positioning station of the positioning module by the conveying drive mechanism, and the next round of inkjet printing operation is performed according to the above operation; The card with double printed surfaces is transported downward by the discharging module, and the inkjet printing operation of the card is completed.

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