Multi-variety inkjet printing system and method

Abstract

The present application relates to automatic ink-jet printer technical field, provide a kind of suitable for multiple varieties of ink-jet system and ink-jet method, the ink-jet system includes first sensing device, second sensing device, spray head adaptation component and ink-jet unit;First sensing device is used to sense the article information of article on assembly line;Second sensing device is used to sense the position information of article on assembly line in real time;Spray head adaptation component is used to provide adapted ink-jet head according to article information;Wherein, ink-jet unit includes position adjusting assembly and spray head fixing assembly, position adjusting assembly can drive spray head fixing assembly to obtain ink-jet head, and position adjusting assembly can adjust the relative position of the ink-jet head according to position information.The present application can realize the quick switching of ink-jet head, improve the applicability of ink-jet printer, and the issuing of switching instruction is based on article information to realize switching, improve the rate and accuracy of switching, improve the intelligent degree of equipment.

Description

Technical Field

[0001] This invention relates to the technical field of automatic inkjet printing, and more particularly to an inkjet printing system and method suitable for multiple product types. Background Technology

[0002] An inkjet printer is a device that can mark and print on the surface of various objects. It is an indispensable part of modern automated production lines, and is widely used, especially in industries such as food, beverage, pharmaceuticals, cosmetics, and electronics.

[0003] Most existing inkjet printers can only perform coding operations on one product category or using only one type of printhead. However, in actual production, it is often necessary to switch between multiple product categories, and even for products of the same category with different specifications, different printheads are required. Currently, switching between these categories is often done manually, which is difficult, time-consuming, and results in low production efficiency. Summary of the Invention

[0004] This invention provides a coding system and coding method suitable for multiple products, which solves the problem of difficulty in quickly adapting the coding head in the prior art, realizes automatic replacement of the coding head, and improves the intelligence level of the coding machine.

[0005] This invention provides a coding system suitable for multiple product varieties, comprising:

[0006] The first sensing device is used to sense the item information of the items on the assembly line;

[0007] The second sensing device is used to sense the position information of items on the assembly line in real time.

[0008] A nozzle adapter assembly, wherein the nozzle adapter assembly is used to provide an adapted nozzle according to the item information;

[0009] The inkjet printing unit includes a position adjustment component and a printhead fixing component. The printhead fixing component is connected to the position adjustment component. The position adjustment component can drive the printhead fixing component to acquire the printhead, and the position adjustment component can adjust the relative position of the printhead according to the position information.

[0010] The multi-variety inkjet coding system provided by the present invention further includes a third sensing device for real-time sensing of inkjet coding information of items on the production line; the position adjustment component can adjust the position of the printhead according to the inkjet coding information.

[0011] According to the multi-variety inkjet coding system provided by the present invention, the printhead adapter assembly includes a storage mechanism, wherein the storage mechanism has a plurality of inkjet printing sections, each of which is provided with an identification module, the identification module being used to adapt to the item information.

[0012] The storage mechanism includes a housing with multiple independent storage chambers. Each storage chamber has a partition that divides the storage chamber into a first chamber and a second chamber. The first chamber is used to house the main body, and the second chamber is used to house the spray nozzle.

[0013] According to the multi-variety inkjet coding system provided by the present invention, the storage mechanism further includes a lifting part and a connecting part;

[0014] The lifting part is located in the middle of the plurality of storage chambers, the connecting part is connected to the lifting part, and the spray nozzle is disposed on the connecting part;

[0015] The lifting unit has multiple slides, and each slide is arranged in a one-to-one correspondence with a multiple storage chamber. The lifting unit can be connected to the connecting part to drive the connecting part to move up and down along the slides.

[0016] According to the multi-variety inkjet printing system provided by the present invention, the lifting part includes a driving device and a lifting rod, and the lifting rod has a plurality of automatic connectors, which can be connected or disconnected from the lifting part.

[0017] According to the coding system suitable for multiple products provided by the present invention, each of the slides is connected to a plurality of limiting rings, and the plurality of limiting rings are arranged at intervals along the extension direction of the slide.

[0018] According to the multi-variety inkjet coding system provided by the present invention, the position adjustment component includes a rotating disk, a first displacement part and a second displacement part, the first displacement part and the second displacement part are connected to the rotating disk, the first displacement part can move along a first direction, the second displacement part can move along a second direction, a support arm is provided on the second displacement part, and a mounting base is connected to the end of the support arm, the second sensing device and the printhead fixing component are disposed on the mounting base;

[0019] The first direction and the second direction are perpendicular.

[0020] The present invention also provides a coding method suitable for a multi-variety coding system as described in any of the above embodiments, comprising the following steps:

[0021] Obtain item information for items on the assembly line;

[0022] Based on the item information, obtain the appropriate spray nozzle;

[0023] Obtain the real-time location information of items moving on the assembly line;

[0024] The position of the spray dock is adjusted using the location information so that the spray dock reaches a preset position.

[0025] The inkjet terminal is activated to perform inkjet coding operations.

[0026] The inkjet printing method provided by the present invention further includes the following steps:

[0027] Acquire the inkjet printing information, compare the inkjet printing information with the preset inkjet printing information, and output the comparison information;

[0028] Acquire comparison information and output control commands to adjust and calibrate the position of the spray dock.

[0029] According to the inkjet printing method provided by the present invention, the step of obtaining a suitable inkjet printer based on the item information specifically includes:

[0030] Obtain basic information about the item to be printed;

[0031] Based on the acquired basic information, the inkjet database is retrieved, and the inkjet pattern is obtained by adapting the inkjet database.

[0032] The system obtains the appropriate inkjet printer information based on the inkjet printing mode and issues control commands to assemble the inkjet printer.

[0033] According to any embodiment of the invention described above, the present invention has at least the following beneficial effects:

[0034] This invention provides a multi-product inkjet printing system that, through the setting of printhead adapter components, enables the switching of printheads during inkjet printing operations, improving the applicability of the inkjet printer. Furthermore, the switching command is issued based on the item information to achieve the switching, improving the switching speed and accuracy. In addition, the inkjet printing system enables inkjet printing operations on multiple product categories through printhead switching, enhancing the intelligence level of the equipment. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the inkjet printing system provided by the present invention;

[0037] Figure 2This is a schematic diagram of the printhead adapter component in the inkjet printing system provided by the present invention;

[0038] Figure 3 This is a schematic diagram of the position adjustment component in the inkjet printing system provided by the present invention;

[0039] Figure 4 This is a schematic diagram illustrating the connection principle between the printhead fixing assembly and the connecting part in the inkjet printing system provided by the present invention;

[0040] Figure 5 This is a flowchart illustrating the inkjet printing method provided by the present invention.

[0041] Figure label:

[0042] 10. First sensing device; 20. Second sensing device; 30. Third sensing device; 40. Position adjustment assembly; 41. Rotary disk; 42. First displacement part; 43. Second displacement part; 44. Support arm; 45. Nozzle fixing assembly; 46. Mounting base; 50. Nozzle adapter assembly; 51. Housing; 52. Lifting part; 521. Lifting rod; 522. Automatic connector; 53. Slide rail; 54. Limiting ring; 55. Marking module; 56. Connecting part; 561. Matching positioning post; 60. Spraying dock; 61. Connecting line. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0046] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The following is combined Figure 1 This invention describes a multi-product inkjet printing system suitable for various product categories. The system includes a first sensing device 10, a second sensing device 20, a printhead adapter component 50, and an inkjet printing unit. The first sensing device 10 senses item information on an assembly line. The second sensing device 20 senses the position information of items on the assembly line in real time. The printhead adapter component 50 provides an adapted printhead terminal 60 based on the item information. The inkjet printing unit includes a position adjustment component 40 and a printhead fixing component 45. The printhead fixing component 45 is connected to the position adjustment component 40. The position adjustment component 40 can drive the printhead fixing component 45 to acquire the printhead terminal 60, and the position adjustment component 40 can adjust the relative position of the printhead terminal 60 according to the position information.

[0049] In this embodiment, the nozzle adapter component 50 has multiple nozzle terminals 60. When selecting multiple nozzle terminals 60, they are adapted according to the item information. The nozzle fixing component 45 can connect to the adapted nozzle terminals 60 under the drive of the position adjustment component 40, so as to realize the connection between the nozzle terminals 60 and the nozzle fixing component 45.

[0050] Different printheads 60 are often required for coding different types of items. For example, laser coding is commonly used for nameplates, while laser printheads are typically used in the packaging industry, and inkjet printheads may be needed for other packaging applications. This necessitates printhead replacement and coding adjustments when switching between product categories to accommodate different printing methods. Clearly, this makes printhead replacement cumbersome and inefficient for product changeovers, especially for multi-category, small-batch production. In this embodiment, a printhead adapter component 50 is used to adapt the printheads 60. This adapter component 50 includes printheads 60 for multiple product categories, enabling rapid switching of printheads 60 when changing between different product categories, thus improving the efficiency of coding multiple product categories.

[0051] In specific settings, the coding system includes a processor that receives information and outputs instructions based on that information. For example, the processor can output control instructions based on the item information obtained by the first sensing device 10, causing the printhead adapter component 50 to work and adapt to the printhead terminal 60. The processor can also output instructions based on the position information obtained by the second sensing device 20, controlling the position adjustment component 40 to adjust so that the printhead terminal 60 can reach the predetermined position for coding operations.

[0052] According to an embodiment of the present invention, the inkjet printing system further includes a third sensing device 30, which is used to sense the inkjet printing information of items on the production line in real time; the position adjustment component 40 can adjust the position of the printhead according to the inkjet printing information. After inkjet printing, the items move forward with the production line. As the inkjet printing time increases, the printhead 60 often faces the risk of inkjet printing quality degradation and inkjet printing position deviation in actual use. In this example, by setting the third sensing device 30, the items can be independently detected after inkjet printing, so as to realize the monitoring of the inkjet printing quality of the items. The third sensing device 30 can judge the inkjet printing position and inkjet printing quality by detecting the inkjet printing information, and the position of the printhead can be adjusted in real time through this judgment.

[0053] Understandably, the quality of the inkjet printing after installation is usually related to the position of the inkjet head 60 and the distance between the printhead and the marked item. During long-term inkjet printing, due to equipment issues and switching, there is a potential risk that the position of the inkjet head 60 may deviate. By setting up a third printhead, the inkjet printing quality can be monitored in real time, and by monitoring it independently, it is not affected by the components on the main body of the equipment, thus improving the inkjet printing quality of the inkjet head 60.

[0054] In specific settings, when the third sensing device 30 detects quality problems such as unclear or misaligned coding on the item, the third sensing device 30 can send the detected information to the system. The system can process the information, collect the current position information of the coding dock 60, and then adjust and calibrate the current coding dock 60 so that the coding dock 60 has a predetermined coding position.

[0055] In a specific example, the printhead adapter component 50 includes a storage mechanism containing multiple printing sections. Each printing section is equipped with an identification module 55, which is used to adapt to item information. Each item has an information tag. The first sensing device 10 can collect basic information about the identified item through the information tag. Based on the basic information, the system can obtain the appropriate printing mode. The printing mode has a corresponding selected printing section. Each printing section has an identification module 55, and each identification module 55 can match the printing mode in the system so that when the system outputs a specific printing mode, the corresponding printing section responds, thereby obtaining the adapted printhead 60.

[0056] Understandably, multiple coding units can adapt to coding different types of items, thus enabling rapid switching between different types of items on the same production line and improving the efficiency of item switching.

[0057] In a specific configuration, the storage mechanism includes a housing 51, which has multiple independent storage chambers. Each storage chamber has a partition that divides the storage chamber into a first chamber and a second chamber. The first chamber is used to house the main unit, and the second chamber is used to house the inkjet printer 60. The inkjet printer 60 is connected to the main unit via a connecting line 61. The main unit can provide energy or inkjet printing material to the inkjet printer 60.

[0058] The printhead terminal 60 typically serves as the output end for coding, while the host unit receives commands to control the printhead terminal 60 to perform coding operations. Some inkjet printhead terminals 60 also have storage space within their main body for storing coding materials, such as ink cartridges. It is understood that the printhead terminal 60 is connected to the host unit via a connecting cable 61 or a connecting tube. The connection of the connecting cable 61 or connecting tube to the printhead terminal 60 can be achieved using a plug, thus ensuring quick and easy connection of the printhead.

[0059] In a specific configuration, each slide rail 53 is connected to multiple limiting rings 54, which are spaced apart along the extension direction of the slide rail 53. The spray nozzle 60 and the main body are mostly connected via connecting lines 61 or connecting pipes. This can cause the connecting lines 61 or connecting pipes to interfere with external devices or objects during the adaptation process of the spray nozzle 60. In this embodiment, the limiting rings 54 confine the connecting lines 61 or connecting pipes within the limiting rings 54, avoiding interference and improving the system's applicability.

[0060] In a further example, the storage mechanism also includes a lifting part 52 and a connecting part 56. The lifting part 52 is located in the middle of multiple storage chambers, and the connecting part 56 is connected to the lifting part 52. The inkjet header 60 is disposed on the connecting part 56. The lifting part 52 has multiple slides 53, and the multiple slides 53 are arranged one-to-one with the multiple storage chambers. The lifting part 52 can be connected to the connecting part 56 to drive the connecting part 56 to move up and down along the slides 53. As one of the key components in the inkjet printer, the inkjet header 60 will be affected by more particulate matter and dust if it is kept in the external environment for a long time, which will lead to a decline in the quality of the inkjet header 60. Therefore, in this embodiment, the idle inkjet header 60 is stored in the storage chamber. When needed, the connecting part 56 is raised by the lifting part 52, which can drive the inkjet header 60 to be raised for configuration, so as to realize the gripping of the inkjet header 60.

[0061] It is understandable that, since the shapes and structures of various spray docks 60 are quite different, the connection part 56 is used to connect various spray docks 60. When lifting or lowering, the lifting part 52 is operated to drive the connection part 56 to lift or lower, thereby realizing the lifting or lowering operation of the spray dock 60.

[0062] In a specific example, the lifting unit 52 includes a drive device and a lifting rod 521. The lifting rod 521 has multiple automatic connectors 522, which can connect or disconnect from the connecting unit 56. When the connecting unit 56 is raised or lowered, it needs to automatically connect and disconnect from the lifting unit 52. In this way, the connecting unit 56 can connect to the lifting unit 52 when it is at the bottom, and then the connecting unit 56 can be raised or lowered together with the lifting unit 52 during the raising and lowering process. Specifically, when it rises to a predetermined position, the nozzle fixing component 45 on the position adjustment assembly 40 can cooperate with the connecting unit 56, thereby disengaging the automatic connectors 522 and connecting them to the nozzle fixing component 45.

[0063] In some embodiments, the automatic connector 522 is an electromagnetic structure, such as an electromagnet. The electromagnetic structure can effectively control the connection and separation of the lifting rod 521 and the connecting part 56, thereby realizing the disconnection and connection of the connecting part 56.

[0064] The switching process in the above embodiment is as follows: when the first sensing device 10 detects that the item has been changed through the label of the item, it can input the item information. The system can obtain the appropriate inkjet printing mode according to the item information. The inkjet printing mode has the appropriate inkjet header 60 information. The system matches the inkjet header 60 information to the corresponding identification module 55. The storage chamber of the corresponding identification module 55 is opened, the automatic connector 522 is connected, and the connecting part 56 is moved up to the top position of the lifting part 52 through the lifting part 52. At this time, the nozzle fixing component 45 in the position adjustment component 40 reaches the predetermined position, and the nozzle fixing component 45 can be connected to the connecting part 56, thereby realizing the connection of the appropriate inkjet header 60.

[0065] like Figure 3 As shown, the position adjustment assembly 40 includes a rotating disk 41, a first displacement part 42 and a second displacement part 43. The first displacement part 42 and the second displacement part 43 are connected to the rotating disk 41. The first displacement part 42 can move along a first direction, and the second displacement part 43 can move along a second direction. A support arm 44 is provided on the second displacement part 43. A mounting base 46 is connected to the end of the support part. The second sensing device 20 and the nozzle fixing assembly 45 are disposed on the mounting base 46.

[0066] In some specific embodiments, the nozzle fixing assembly 45 has an electro-adsorption sleeve with a flared port. The corresponding connecting part 56 has a mating positioning post 561 that can extend into the electro-adsorption sleeve to connect the connecting part 56 with the nozzle fixing assembly 45.

[0067] The present invention also provides a coding method suitable for multi-variety coding systems provided in any of the above embodiments, comprising the steps of:

[0068] Step 100: Obtain item information for items on the assembly line;

[0069] Step 200: Obtain the appropriate spray nozzle 60 based on the item information;

[0070] Step 300: Obtain the real-time location information of items moving on the assembly line;

[0071] Step 400: Adjust the position of the spray dock 60 using the position information so that the spray dock 60 reaches the preset position;

[0072] Step 500: Activate the inkjet terminal 60 to perform inkjet coding operation.

[0073] In a specific example, the inkjet printing method in this embodiment further includes the following steps:

[0074] Step 600: Obtain the inkjet printing information, compare the inkjet printing information with the preset inkjet printing information and output the comparison information, obtain the comparison information and output the control command to adjust and calibrate the position of the inkjet printer 60.

[0075] In a specific setup, according to the coding method provided by the present invention, in step 100, the items or packaging on the production line have label information, and the first sensing device 10 can identify this information and transmit it to the system. During setup, the first sensing device 10 is placed at the beginning of the production line. When an item is transported onto the production line, the first sensing device 10 can identify the information on the label. In some specific examples, the label information includes the category and specific specifications; for example, the category is mineral water packaging box, and the specification is a 200ml packaging box.

[0076] In step 200, based on the label information of the item, the system can adapt to the corresponding inkjet printing mode. That is, the system has multiple product categories and multiple model libraries of different specifications of the same product category. The model library corresponds to different inkjet printing modes. Each inkjet printing mode has corresponding inkjet terminal 60 information, inkjet terminal 60 position information, and distance information between inkjet terminal 60 and the label packaging. After the system obtains the inkjet printing mode information, it will output control commands based on the inkjet printing mode, so that the printhead adapter component 50 outputs the corresponding inkjet terminal 60 and the printhead fixing component 45 performs the printhead picking operation.

[0077] Specifically, after the system obtains a specific coding pattern, it sends a command to the corresponding marking module 55 of the coding section. After receiving the command, the marking module 55 connects the corresponding automatic connector 522 on the lifting section 52 to the connecting section 56. At this time, the opening and closing door at the top of the storage chamber opens, and the lifting section 52 drives the lifting rod 521 to rise, which in turn drives the connecting section 56 to rise. After rising to the predetermined position at the top, the nozzle fixing assembly 45 has rotated a predetermined angle and is positioned above the lifting section 52. The nozzle fixing assembly 45 and the connecting section 56 cooperate to connect and retrieve the coding terminal 60. Then, the support arm 44 returns to its initial position under the drive of the rotating disk 41. For example, in the above embodiment, the coding pattern corresponding to the information of a mineral water packaging box with a specification of 200ML is found in the database, and the coding pattern is output to the system. The system then performs the matching operation of the coding terminal 60 in the next process based on this pattern.

[0078] In steps 300 and 400, the second sensing device 20 can sense the position and distance of the marked items on the production line, and through sensing, the initial position of the spray dock 60 can be adjusted to match the position of the spray dock 60 and the distance between the spray dock 60 and the items, so as to achieve the position and distance set in the predetermined pattern in the database.

[0079] In step 500, after the initial position adjustment is completed, the system sends a command to the host unit to control the operation of the inkjet printer 60 to print codes on the workpiece.

[0080] In step 600, a third sensing device 30 is set in the next process of the inkjet printer. The third sensing device 30 can detect and monitor the inkjet on the item. The system analyzes the collected inkjet quality and inkjet position and outputs the analysis results. When the analysis results are consistent with the inkjet structure in the preset mode, no control command will be output. When the analysis results find that the position is deviated or the inkjet quality is reduced, the position of the inkjet terminal 60 is calibrated by adjusting the first displacement part 42 and the second displacement part 43.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coding system suitable for multiple product varieties, characterized in that, include: The first sensing device is used to sense the item information of the items on the assembly line; The second sensing device is used to sense the position information of items on the assembly line in real time. A nozzle adapter assembly, wherein the nozzle adapter assembly is used to provide an adapted nozzle according to the item information; The inkjet printing unit includes a position adjustment component and a printhead fixing component. The printhead fixing component is connected to the position adjustment component. The position adjustment component can drive the printhead fixing component to acquire the printhead, and the position adjustment component can adjust the relative position of the printhead according to the position information. The printhead adapter assembly includes a storage mechanism, which has multiple printing sections. Each printing section is equipped with an identification module, which is used to adapt to the item information. The storage mechanism includes a housing, a lifting part, and a connecting part. The housing has multiple independent storage chambers. Each storage chamber has a partition that divides the storage chamber into a first chamber and a second chamber. The first chamber is used to place the main body, and the second chamber is used to place the spray nozzle. The lifting part is located in the middle of the plurality of storage chambers, the connecting part is connected to the lifting part, and the spray nozzle is disposed on the connecting part; the lifting part has a plurality of slides, and the plurality of slides are arranged one-to-one with the plurality of storage chambers; the lifting part can be connected to the connecting part to drive the connecting part to move up and down along the slides. The nozzle fixing assembly has an electro-adsorption sleeve with a flared port. The corresponding connecting part has a mating positioning post that can extend into the electro-adsorption sleeve to connect the connecting part with the nozzle fixing assembly.

2. The inkjet printing system suitable for multiple product varieties according to claim 1, characterized in that, It also includes a third sensing device for real-time sensing of the inkjet printing information of items on the production line; the position adjustment component can adjust the position of the printhead according to the inkjet printing information.

3. The inkjet printing system suitable for multiple product varieties according to claim 1, characterized in that, The lifting unit includes a drive device and a lifting rod. The lifting rod has multiple automatic connectors that can connect or disconnect from the lifting unit.

4. The inkjet printing system suitable for multiple product varieties according to claim 1, characterized in that, Each of the slides is connected to a plurality of limiting rings, which are arranged at intervals along the extension direction of the slide.

5. The inkjet printing system suitable for multiple product varieties according to claim 1, characterized in that, The position adjustment assembly includes a rotating disk, a first displacement part and a second displacement part. The first displacement part and the second displacement part are connected to the rotating disk. The first displacement part can move along a first direction, and the second displacement part can move along a second direction. A support arm is provided on the second displacement part, and a mounting base is connected to the end of the support arm. The second sensing device and the nozzle fixing assembly are disposed on the mounting base. The first direction and the second direction are perpendicular.

6. A coding method using the coding system suitable for multiple product varieties as described in any one of claims 1-5, characterized in that, Including the following steps: Obtain item information for items on the assembly line; Based on the item information, obtain the appropriate spray nozzle; Obtain the real-time location information of items moving on the assembly line; The position of the spray dock is adjusted using the location information so that the spray dock reaches a preset position. The inkjet terminal is activated to perform inkjet coding operations.

7. The inkjet printing method according to claim 6, characterized in that, It also includes the following steps: Acquire the inkjet printing information, compare the inkjet printing information with the preset inkjet printing information, and output the comparison information; Acquire comparison information and output control commands to adjust and calibrate the position of the spray dock.

8. The inkjet printing method according to claim 6, characterized in that, The step of obtaining the appropriate spray nozzle based on the item information specifically includes: Obtain basic information about the item to be printed; Based on the acquired basic information, the inkjet database is retrieved, and the inkjet pattern is obtained by adapting the inkjet database. The system obtains the appropriate inkjet printer information based on the inkjet printing mode and issues control commands to assemble the inkjet printer.

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