Automatically detect Onepass printing devices and Onepass printing methods

Abstract

The present invention belongs to the technical field of printing equipment, and more particularly, relates to an automatically detected Onepass printing device and a Onepass printing method. The automatically detected Onepass printing device comprises: a first conveying device for conveying a printing medium along a first conveying path; a printing device located above the first conveying path, the printing device for printing an image on the printing medium; a detection device for detecting a printed sample, the detection device and the printing device being located on opposite sides of the first conveying device; and a second conveying device for conveying the printed sample to a detection position along a second conveying path different from the first path. The present invention can perform real-time detection of the printing effect when the Onepass printed material is continuously conveyed in single sheets.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, and in particular to an automatically detected Onepass printing device and a Onepass printing method. Background Art

[0002] Inkjet printing refers to the process of spraying ink droplets onto a print medium through the nozzles on the print head to obtain an image or text. Onepass inkjet printing technology is a high-speed printing technology in the current field of inkjet printing. Onepass inkjet printing technology connects multiple print heads end to end to form a print head group, which can cover the entire image to be printed. The print head group forms the image to be printed on the print medium after one scan, and its printing speed is fast and efficient.

[0003] After the inkjet printer nozzle has been working for a long time, it is easy to cause abnormal nozzle status, such as blockage, slanted spray, weak ink, insufficient ink, etc., due to ink path pollution, ink precipitation, dust, water vapor and other reasons, which will cause problems such as line drawing and blankness in the printed image, seriously affecting the quality of the product. When the entire nozzle is replaced only because a small number of nozzles are abnormal and cannot compensate for printing, it will affect the production progress and cause resource waste and cost increase. For this, the printed image can be tested, and then the abnormal nozzles can be judged according to the test results. However, since the nozzle does not move during Onepass inkjet printing, to analyze whether there are abnormal nozzles in the nozzle, the detection system can only be installed behind the nozzle. In this way, only after the target image is printed can it be determined whether there are abnormal nozzles and the location of the abnormal nozzles, and the function of real-time detection of the printing effect cannot be realized. Summary of the invention

[0004] In view of this, the embodiments of the present invention provide an automatically detected Onepass printing device and a Onepass printing method to solve the technical problem in the prior art that the printing effect cannot be detected in real time when the Onepass printing material is continuously transmitted one by one.

[0005] The technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides an automatically detected Onepass printing device, comprising:

[0007] a first conveying device for conveying the printing medium along a first conveying path;

[0008] A printing device, located above the first conveying path, the printing device is used to print an image on a printing medium;

[0009] A detection device, used for detecting the printed sample, wherein the detection device and the printing device are respectively located on two opposite sides of the first conveying device;

[0010] The second conveying device is used to convey the printed sample to the detection position along a second conveying path different from the first path.

[0011] Preferably, the first conveying device is provided with an opening, and the second conveying device is located below the opening.

[0012] Preferably, the printer further includes a transport path switching mechanism for switching a transport path of the printing medium between a first transport path and a second transport path.

[0013] Preferably, the printing device comprises a nozzle, and the switching position between the first conveying path and the second conveying path is located directly below the nozzle.

[0014] Preferably, the path switching mechanism further includes an opening and closing mechanism for closing or opening the opening.

[0015] Preferably, it is characterized in that the second conveying device comprises a roller and a first driver, the first driver is drivingly connected to the roller, and the first driver is used to drive the roller to rotate relative to the detection device.

[0016] Preferably, the first conveying device is provided with a first conveying surface moving along a first conveying path, and the circumferential surface of the roller is tangent to the first conveying surface.

[0017] Preferably, the second conveying device comprises a second conveying surface, a third conveying surface and a second driver, the second driver is drivingly connected with the second conveying surface and the third conveying surface, and the third conveying surface is inclined at a first preset angle relative to the second conveying surface.

[0018] Preferably, the second conveying plane and the third conveying plane are perpendicular to each other, and the detection device comprises an image acquisition component, and the image acquisition component is perpendicular to the third conveying plane.

[0019] In a second aspect, the present invention provides a Onepass printing method, which uses the Onepass printing device automatically detected by the first aspect to print, and the method comprises the following steps:

[0020] S1: Printing a print sample according to the print data of the print sample;

[0021] S2: conveying the printed sample along the second conveying path to a detection position for detection;

[0022] S3: transporting the printing medium for formal printing along the first transport path to below the nozzle;

[0023] S4: Printing the target image on the printing medium for formal printing according to the detection result.

[0024] Beneficial effects: The Onepass printing device and Onepass printing method for automatic detection of the present invention, on the one hand, use the second conveying device to convey the print medium for printing samples to the bottom of the printing device, use the printing device to print the print sample for detection, and then use the second conveying device to convey the print sample to the detection position along the second conveying path for detection by the detection device, and on the other hand, use the first conveying device to convey the print medium to be printed along the first conveying path to the bottom of the printing device, and then use the printing device to print the formal image on the print medium, and the print medium that has completed the formal printing is further conveyed by the first conveying device along the first conveying path. Since the first conveying path and the second conveying path are different, and the printing device and the detection device are arranged on opposite sides of the first conveying device, the detection system is placed in front of the printing system, and the detection of the print sample can be completed before the printing of the formal image, and the detection and formal printing do not affect each other, so that the printing mode can be quickly adjusted according to the real-time detection results during printing, thereby eliminating the influence of abnormal nozzles on the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0026] Figure 1 A front view of the Onepass printing device automatically detected by the present invention;

[0027] Figure 2 It is a structural schematic diagram of the opening and closing mechanism of the Onepass printing device automatically detected by the present invention when it is opened;

[0028] Figure 3 It is a schematic diagram of the structure of the Onepass printing device when the opening and closing mechanism of the Onepass printing device automatically detected by the present invention is closed;

[0029] Figure 4 is a schematic structural diagram of a second conveying device in Embodiment 2 of the present invention;

[0030] Figure 5 This is a schematic diagram of the detection device in Example 2 of the present invention detecting a printed sample;

[0031] Figure 6 is a schematic structural diagram of a second conveying device in Embodiment 3 of the present invention;

[0032] Figure 7 This is a schematic diagram of the detection device in Example 3 of the present invention detecting a printed sample;

[0033] Figure 8 is a flow chart of the Onepass printing method of the present invention;

[0034] Fig. 9 This is a schematic diagram of the principle of printing using a roller as the second printing device in the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the protection scope of the present invention.

[0036] Example 1

[0037] like Figure 1 As shown, the embodiment of the present invention discloses an automatic detection Onepass printing device, which includes a first transmission device 10, a printing device 20, a detection device 30 and a second transmission device 40:

[0038] The first conveying device 10 is used to convey the printing medium 50 along the first conveying path;

[0039] After loading, the print medium 50 to be printed is placed on the first conveying surface of the first conveying device 10. During the movement of the first conveying surface along the first conveying path, the print medium 50 to be printed is conveyed from the loading position along the first conveying path. The first conveying device 10 can be a belt conveyor, a roller conveyor, or a platform conveyor. Figure 1 The arrow x in the middle indicates the first transmission path.

[0040] The first conveying device 10 is provided with a first conveying surface that moves along the first conveying path. The aforementioned first conveying surface refers to the surface where the first conveying device 10 contacts the printing medium 50 during the conveying process of the printing medium 50, such as the surface of the conveyor belt where the belt conveyor contacts the printing medium 50, the surface formed by the roller where the roller conveyor contacts the printing medium 50, the surface of the conveying platform where the nozzle conveyor contacts the printing medium 50, etc. The first conveying surface can be a plane, a curved surface or a surface of other shapes. The first conveying surface can be a continuous surface or a discontinuous surface, and there is no limitation here.

[0041] A printing device 20, located above the first conveying path, the printing device 20 is used to print an image on a printing medium 50;

[0042] The printing device 20 is provided with a nozzle that can spray droplets, and a plurality of nozzles are arranged on the nozzle. Since the printing device 20 is located above the first conveying path, the medium to be printed will pass under the printing device 20 when being conveyed along the first conveying path. When the medium 50 to be printed is conveyed to the bottom of the nozzle, the ink of the nozzle sprays droplets to the medium to be printed, and the droplets form an image on the printing medium 50. When the printing medium 50 for printing the sample 60 passes under the printing device 20, the printing device 20 prints a test image on the printing medium 50, and after printing, a printing sample 60 for testing is formed; when the printing medium 50 for formal printing passes under the printing device 20, the printing device 20 prints a formal image on the printing medium 50, and after printing, a formal product is formed.

[0043] A detection device 30, used for detecting the printed sample 60, wherein the detection device 30 and the printing device 20 are respectively located on two opposite sides of the first conveying surface;

[0044] The detection device 30 can be a CCD, laser or other image visual detection device 30. The detection device 30 and the printing device 20 are arranged on different sides of the first conveying device 10, so that the detection device 30 and the printing device 20 can not interfere with each other. When the first conveying device 10 is provided with a first conveying surface, the detection device 30 and the printing device 20 are arranged on opposite sides of the first conveying surface.

[0045] The second conveying device 40 is used to convey the printed sample 60 to the inspection position along a second conveying path different from the first path.

[0046] If the printed sample 60 for testing is formed after printing, it is transported to the testing position by the second transport device 40, and then the printed sample 60 is tested by the testing device 30. Since the second transport path is different from the first transport path, all the transport samples and the testing samples will not affect the subsequent printing and transport of the printing medium 50 for formal printing.

[0047] The Onepass printing device of this embodiment, on the one hand, uses the second conveying device to convey the print medium for printing samples to the bottom of the printing device, uses the printing device to print the print sample for detection, and then uses the second conveying device to convey the print sample to the detection position along the second conveying path for detection by the detection device, and on the other hand, uses the first conveying device to convey the print medium to be printed along the first conveying path to the bottom of the printing device, and then uses the printing device to print the formal image on the print medium, and the print medium that has completed the formal printing is further conveyed by the first conveying device along the first conveying path. Since the first conveying path and the second conveying path are different, and the printing device 20 and the detection device 30 are arranged on opposite sides of the first conveying device 10, the detection system is placed in front of the printing system, and the detection of the print sample 60 can be completed before the printing of the formal image, and the detection and formal printing do not affect each other, so that the printing mode can be quickly adjusted according to the real-time detection results during printing, thereby eliminating the influence of abnormal nozzles on the printing effect.

[0048] As a preferred embodiment, the first conveying device is provided with an opening 44, the second conveying device 40 is located below the opening 44, and the opening 44 is used for the printing device to print the printing medium on the second conveying device to obtain a printing sample. The size of the opening 44 is set to be smaller than the printing medium 50 used for formal printing, but larger than the printing sample 60.

[0049] When the above method is adopted, the first conveying device may include conveying belts, conveying rollers, conveying wheels and other conveying mechanisms arranged on both sides of the opening 44. The printed print medium 50 is conveyed by the conveying mechanisms on both sides, so that the opening 44 remains unchanged during the conveying process.

[0050] When printing the sample, the printing medium is placed on the second conveying device, or at least a portion of the second conveying device is made of a material that can accept inkjet printing. The droplets ejected by the printing device drip onto the printing medium of the second conveying device after passing through the opening, or drip onto the portion of the second conveying device that can accept inkjet printing to form a desired pattern of the printed sample.

[0051] In addition, in this embodiment, the first conveying device can also be used to convey the print medium to be printed along the first conveying path to the bottom of the printing device, and then the printing device can be used to print the formal image or the image for detection on the print medium, and the second conveying device can be used to convey the detection sample to the detection position along the second conveying path for detection by the detection device. The print medium that has completed formal printing is further conveyed by the first conveying device along the first conveying path.

[0052] The second path can take the position on the first path where the print medium 50 passes after printing as the starting point, and extend from the starting point to the position that can be detected by the detection device 30. In this way, the print sample 60 can be immediately transported to the detection position for detection after printing, so that the print data can be adjusted in real time according to the detection result. The second conveying device can be provided with a negative pressure hole that can absorb the print medium, or a surface with a large friction coefficient.

[0053] In this embodiment, the printed sample 60 conveyed by the first conveying device 10 to the bottom of the printing device 20 after printing can be transferred to the second conveying device 40 by manual operation, and then conveyed to the detection position by the second conveying device 40.

[0054] In order to improve efficiency, the present embodiment can also automatically transfer the print sample 60 printed by the printing device 20 from the first conveying device 10 to the second conveying device 40. In this regard, in the present embodiment, the onepass printing device for automatic detection further includes a conveying path switching mechanism, which is used to switch the conveying path of the print medium 50 between the first conveying path and the second conveying path. The switching position can be the position after the print medium 50 passes through the nozzle in the conveying direction along the first conveying path. When the print sample 60 is printed, the conveying path switching mechanism connects the second conveying path with the first conveying path at the switching position, and allows the print sample 60 to enter the second conveying path from the first conveying path. If the current printing is a formal image, the conveying path switching mechanism disconnects the connection between the second conveying path and the second conveying path, so that the formally printed print medium 50 can only continue to be conveyed along the first conveying path, and will not enter the second conveying path to interfere with the detection of the print sample 60. In particular, when there are other devices on the first conveying path, such as a curing device and a nozzle maintenance device, after the printing device of the present embodiment is adopted, the detection device 30 will not interfere with them.

[0055] As a preferred embodiment, the switching position of the first transmission path and the second transmission path can be located directly below the nozzle. The above method can be used to immediately transmit the printed sample 60 to the detection position for detection after printing, so as to complete the detection before printing the subsequent formal printing image.

[0056] When the print sample 60 is conveyed to the opening 44 of the first conveying device 10 , the print sample 60 falls from the opening 44 onto the second conveying device 40 , and is then conveyed by the second conveying device 40 to the detection position for detection.

[0057] By adopting the above method, the size of the opening 44 can be set to be smaller than the print medium 50 used for formal printing, but larger than the print sample 60. In this way, when the printing device is working, the print sample 60 can automatically fall onto the second printing device 20 when passing through the above opening 44, so that the print sample 60 is automatically transferred from the first conveying path to the second conveying path. Since the size of the print medium 50 used for formal printing is larger than the size of the opening 44, the print medium 50 used for formal printing will not fall onto the second conveying device 40 when passing through the opening 44, but will be continuously transported along the first conveying path by the first conveying device 10. The conveying path switching mechanism adopting the above method has a simple structure, and the modification of the original printing device is small, and the print sample 60 can be automatically transferred to the second conveying mechanism, so that the print medium 50 for formal printing is continuously transported along the first conveying path by the first conveying device 10.

[0058] As another implementation manner, in this embodiment, the path switching mechanism further includes an opening and closing mechanism 45 for closing or opening the opening 44 .

[0059] like Figure 2 As shown, when the print sample 60 needs to be transported to the opening 44 of the first conveying device 10, the opening and closing mechanism 45 opens the opening 44, so that the print sample 60 falls from the opening 44 to the second conveying device 40, and then is transported by the second conveying device 40 to the detection position for detection.

[0060] like Figure 3 As shown, when the printing medium 50 for formal printing is delivered to the opening 44 position of the first conveying device 10, the opening and closing mechanism 45 closes the opening 44, so that the printing medium 50 for formal printing will not fall from the opening 44 position onto the second conveying device 40, but will continue to be conveyed along the first conveying path on the first conveying device 10.

[0061] Through the above-mentioned method, the conveying path switching mechanism can switch the conveying path of the printing medium 50 according to whether the printing medium 50 is a printing sample 60 or a formal image, so that the printing sample 60 is conveyed to the detection position for detection, and the printing medium 50 used for formal printing continues to be conveyed to the next link after printing is completed according to the detection results.

[0062] The opening and closing mechanism 45 includes a shielding member and a driving mechanism. The driving mechanism is used to drive the shielding member to move so that the shielding member can move to a position (first position) that shields the opening 44 and a position (second position) that exposes the opening 44. When the shielding member moves to a position that shields the opening 44, the opening 44 is shielded by the shielding member, and the printing medium 50 cannot fall from the opening 44 onto the second conveying device 40. When the shielding member moves to a position that exposes the opening 44, the printing medium 50 can fall from the opening 44 onto the second conveying device 40. The movement of the shielding member can be translation, up and down movement, rotation, etc.

[0063] As a specific embodiment, the driving mechanism includes a third driver and a guide mechanism, the guide mechanism, the shielding member is connected to the guide mechanism, and the third driver drives the shielding member to move along the guide direction of the guide mechanism, and can move to the first position and the second position. Specifically, the shielding member can be a shielding plate, and the guide mechanism can be a guide groove, and the shielding member can slide along the guide groove. The shielding member is arranged on the side of the first conveying plane opposite to the printing device 20. When the opening and closing mechanism 45 is in a closed state, the third driver drives the shielding plate to move along the guide direction of the guide groove to a position to close the opening 44, and when the opening and closing mechanism 45 is in an open state, the third driver drives the shielding plate to move along the guide direction of the guide groove to a position to expose the opening 44, wherein the guide direction of the guide groove can be parallel to the conveying direction of the printing medium 50 at the opening 44 position. In addition, the shielding member can also be made of two shielding plates. When the opening and closing mechanism 45 is in the open state, the two shielding plates are relatively arranged at both ends of the opening 44. When the opening and closing mechanism 45 is in the closed state, the two shielding plates move toward the middle part of the opening 44 under the drive of the driving mechanism and approach each other to close the opening 44.

[0064] In addition, one end of the shielding member may be rotatably connected to the first conveying device 10 , and the third driver may drive the shielding member to rotate to a position to close the opening 44 , or to a position to expose the opening 44 .

[0065] In addition, the automatic detection Onepass printing device of this embodiment further includes a control circuit, which is electrically connected to the driver of the transmission path switching mechanism. The control circuit controls the transmission path switching mechanism to switch the transmission path of the printing medium 50 according to whether the printing medium 50 prints a test image or a formal image. The control circuit can be a central processing unit (CPU), or other general-purpose processors, single-chip microcomputers, ARM, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), PLCs or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.

[0066] Example 2

[0067] This embodiment provides a specific implementation of the second transmission device 40, such as Figure 4 As shown, in this embodiment, the second conveying device 40 includes a roller 41 and a first driver, the first driver and the roller 41 are drivingly connected, and the first driver is used to drive the roller to rotate relative to the detection device 30.

[0068] The first driver may be a motor, and the output shaft of the motor is connected to the roller 41 in a transmission manner. A rotating shaft may be provided on the roller 41, and the rotating shaft is connected to the output shaft of the motor, so that when the motor is working, the output shaft drives the rotating shaft to rotate, and the rotating shaft drives the roller 41 to rotate. When the printing medium to be sample printed or the part of the second conveying device that can be used for sample printing is conveyed to the bottom of the printing device by the second conveying device 40, the printing device prints and forms a printing sample 60. The printing sample 60 is carried on the outer surface of the roller 41. As the roller 41 rotates, the printing sample 60 moves along the second path in a direction away from the first path until the printing sample 60 moves to the detection position, and then the detection device 30 detects it. On the other hand, the printing medium 50 for formal printing, which is conveyed immediately after the printing sample 60, is conveyed by the first conveying device 10 along the first conveying path to the bottom of the printing device 20 for printing. Since the roller 41 is used as the second conveying device 40, the print sample 60 can automatically rotate to an angle position different from that when the print sample 60 is printed for detection as the roller 41 rotates, and the detection position and the printing position can be staggered by directly utilizing the rotation output by the motor through a simple rotation process, so that the second conveying path is separated from the first conveying path. The detection of the print sample 60 can be placed before the printing of the formal image, and the printing of the print sample 60 and the printing of the formal image can be carried out in parallel without interfering with each other.

[0069] As a preferred implementation, in this embodiment, the first conveying device 10 is provided with a first conveying surface moving along the first conveying path, and the circumferential surface of the roller 41 is tangent to the first conveying surface.

[0070] By adopting the above-mentioned method, when printing a sample, the positional relationship between the printing device and the printing medium used to print the sample is consistent with the positional relationship between the printing device and the printing medium used to print the formal image, so that the printing of the printed sample 60 can be consistent with the printing state of the formal printed image, thereby improving the accuracy of the sample detection. In this embodiment, an opening 44 can be set on the first conveying device 10, and the opening 44 is located directly above the roller 41. The area of ​​the first conveying surface close to the opening 44 adopts a plane shape, so that the roller 41 is tangent to the plane. In this way, the printed sample 60 moves up and down during the process of moving from the plane to the surface of the roller 41, and no deformation will occur. In addition, the nozzle of the printing device 20 can be set directly above the opening 44, so that not only can the printed sample 60 be moved smoothly to the outer surface of the roller 41, but also when the printed sample 60 is on the roller 41, the printed sample 60 can be kept facing the nozzle. At this time, the nozzle can print the printed sample 60. After the printing is completed, the roller 41 only needs to rotate a certain angle to reach the detection position for detection, and the formally printed print medium 50 is immediately conveyed to the bottom of the nozzle for formal printing, so that the detection and formal printing are seamlessly connected.

[0071] like Figure 5 As shown, as a preferred method, the detection direction of the detection component of the detection device 30, such as the detection head, the CCD lens is perpendicular to the direction of the nozzle of the printing device 20. With the above-mentioned setting method, after the print sample 60 is printed under the printing device 20, the roller 41 rotates 90 degrees to transfer the print sample 60 to a position facing the detection component for detection. With the above-mentioned method, the printing device 20 and the detection device 30 can be arranged in a direction that does not interfere with each other, so that the detection device 30 can be well compatible with the original printing device 20 in structure. Therefore, the detection device 30 can be installed in this embodiment without changing or slightly changing the original printing device 20. In addition, when the print sample 60 is printed on the roller 41 in the above-mentioned method, the nozzle can face the printing medium 50, thereby ensuring the accuracy of printing, and when the print sample 60 is rotated to the detection position, it can face the detection device 30, thereby ensuring the accuracy of detection.

[0072] Example 3

[0073] like Figure 6 As shown, this embodiment provides another specific implementation method of the second conveying device 40. In this embodiment, the second conveying device 40 includes a second conveying surface 42, a third conveying surface 43 and a second driver. The second driver is transmission-connected to the second conveying surface 42 and the third conveying surface 43. The third conveying surface 43 is inclined relative to the second conveying surface 42 by a first preset angle. Figure 6 The arrow Y in denoted the second transmission path.

[0074] In this embodiment, the printing medium for printing the sample can be placed on the second conveying surface, and an opening 44 is provided on the first conveying device 10, and the opening 44 is located above the second conveying surface 42. The area of ​​the first conveying surface close to the opening 44 is in a plane shape, and the second conveying surface 42 is parallel to or flush with the plane. At this time, when printing the sample, the positional relationship between the printing device and the printing medium for printing the sample is consistent with the positional relationship between the printing device and the printing medium for printing the formal image, so that the printing state of the printed sample 60 can be consistent with the printing state of the formal printed image, thereby improving the accuracy of sample detection.

[0075] This embodiment can also adopt the method of transferring the print sample 60 from the first conveying device 10 to the second conveying surface 42, then transferring it from the second conveying surface 42 to the third conveying surface 43, and finally transferring it from the third conveying surface 43 to the second conveying surface 42. The second conveying surface 42 plays a role of transition and connection, so that the print sample 60 originally conveyed by the first conveying device 10 can be first smoothly transferred to the second conveying surface 42. Since the third conveying surface 43 is inclined at a certain angle relative to the second conveying surface 42, after the print sample 60 is transferred to the third conveying surface 43, it gradually moves away from the printing device 20 and is conveyed to the detection position for detection, so that the detection and printing processes do not interfere with each other. The range of the first preset angle is 80 o Up to 170 o .

[0076] The third drive can be a motor, and the second conveying device 40 includes a conveying platform and a conveyor belt having the aforementioned second conveying surface 42 and third conveying surface 43. The conveyor belt is arranged along the second conveying surface 42 and the third conveying surface 43, and the conveyor moves along the second conveying surface 42 and the third conveying surface 43 under the drive of the third drive.

[0077] As a preferred implementation, in this embodiment, the first conveying device 10 is provided with a first conveying surface moving along the first conveying path, and the second conveying surface 42 is parallel to the first conveying surface.

[0078] By adopting the above-mentioned method, when the printed sample 60 is transferred from the first conveying surface of the first conveying device 10 to the second conveying surface 42, the transition can be very smooth, and the printing medium 50 will not be unevenly deformed. In addition, an opening 44 can be provided on the first conveying device 10, and the opening 44 is located above the second conveying surface 42. The area of ​​the first conveying surface close to the opening 44 is in the shape of a plane, and the second conveying surface 42 is parallel to or flush with the plane. In this way, the printed sample 60 will not be greatly deformed during the process of moving from the plane to the second conveying surface 42. In addition, the nozzle of the printing device 20 can be arranged directly above the opening 44, so that not only can the print sample 60 be smoothly moved to the second conveying surface 42, but also the print sample 60 can be kept facing the nozzle when the print sample 60 is on the second conveying surface 42 of the second conveying device 40, and the nozzle can print the print sample 60. After printing, the print sample 60 is transferred from the second conveying surface 42 to the third conveying surface 43, and is transferred from the third conveying surface 43 to the detection position for detection, and the formally printed print medium 50 is immediately transferred to the bottom of the nozzle for formal printing, so that the detection and formal printing are seamlessly connected. In the above-mentioned manner, a first conveying plate with a smaller thickness can be used to form the second conveying surface 42, and a second conveying plate with a smaller thickness can be used to form the third conveying surface 43. A larger space can be reserved under the first conveying plate and the second conveying plate to install other components, such as a driver, a control circuit, etc., so that while the print sample 60 is transferred along the second conveying path, the space occupied by the second drive device and the entire printing device is reduced.

[0079] In this embodiment, as a preferred implementation method, the second conveying surface 42 and the third conveying surface 43 are perpendicular to each other, and the detection device 30 includes an image acquisition component, and the image acquisition component is perpendicular to the third conveying surface 43.

[0080] The aforementioned acquisition component can be a detection head, a CCD lens, etc. In the aforementioned manner, the nozzle of the printing device 20 is oriented in a direction perpendicular to the second conveying surface 42. In the aforementioned manner, the printing device 20 and the detection device 30 can be arranged in a direction that does not interfere with each other, so that the detection device 30 can be well compatible with the original printing device 20 in terms of structure. Therefore, in this embodiment, the detection device 30 can be installed without changing or with little change to the original printing device 20. In addition, when the sample 60 is printed on the second conveying surface 42 in the aforementioned manner, the nozzle can face the printing medium 50, thereby ensuring the accuracy of the printing, such as Figure 7As shown, when the printed sample 60 moves to the detection position along the third conveying surface 43, it can face the detection device 30, thereby ensuring the accuracy of the detection. Since the second conveying surface 42 is perpendicular to the third conveying surface 43, the droplets sprayed by the nozzle are blocked by the second conveying surface 42 and will not drop onto the printed sample 60 being detected on the third conveying surface 43, thereby effectively avoiding the influence of the printing device 20 on the detection process of the printed sample 60.

[0081] Example 4

[0082] like Figure 8 As shown, this embodiment provides a Onepass printing method, which uses the Onepass printing device of any of the above embodiments to print, and the method can print on a continuous single sheet. The method includes the following steps:

[0083] S1: Printing a print sample 60 according to the print data of the print sample;

[0084] When the printing material is continuously conveyed in sheets, the printing sample 60 may be printed in the intervals between printings.

[0085] S2: transporting the printed sample 60 along the second path to a detection position for detection.

[0086] After the printing of the print sample 60 is completed, the transport path of the print sample 60 is separated from the first transport path and is transported to the detection position along the second transport path.

[0087] S3: conveying the printing medium 50 for formal printing along the first path to below the nozzle.

[0088] Since the print sample 60 has been separated from the first conveying path, after or while the print sample 60 is detected, the print medium 50 for formal printing is conveyed along the first conveying path to below the nozzle to prepare for printing.

[0089] S4: Printing a target image on the printing medium 50 for regular printing according to the detection result.

[0090] This step also includes:

[0091] S41: Obtaining the detection result of the printed sample 60;

[0092] S42: Acquire original printing data;

[0093] S43: Modify the original printing data according to the detection result to obtain the target printing data;

[0094] S44: Printing a target image on a printing medium 50 for formal printing according to the target printing data;

[0095] Wherein, the step 43: obtaining target printing data after modifying the original printing data according to the detection result, further includes:

[0096] S431: Determine the position of the abnormal nozzle in the nozzle according to the detection result;

[0097] S432: determining a compensation nozzle for compensatory printing according to the position of the abnormal nozzle;

[0098] S433: Modify the original printing data according to the position of the abnormal nozzle and the compensation nozzle to obtain the target printing data.

[0099] In this embodiment, color bars can be printed in the gap between one-pass printing, and then the printed color bars can be rotated to detect whether abnormal nozzles appear, and then the original printing data can be modified according to the position of the abnormal nozzles. Since the print sample 60 is sent to the detection position for detection along the second transmission path different from the first transmission path after printing, and the subsequent print medium 50 for formal printing can continue to be sent to the printing device 20 along the first transmission path, the detection of the print sample 60 can be completed before printing, so that the print data can be adjusted in real time according to the detection results, thereby eliminating the influence of abnormal nozzles on the printing effect during formal printing.

[0100] The principle of printing by using the roller 41 as the second conveying device 40 in the method of this embodiment is as follows: Fig. 9 shown.

[0101] The functional blocks shown in the structural block diagram described above can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried by a carrier. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0102] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

[0103] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system, module and unit described above can refer to the corresponding process of the aforementioned method embodiment, which will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

Claims

1. Automatic detection of Onepass printing devices, characterized by, include: a first conveying device for conveying the printing medium along a first conveying path; A printing device, located above the first conveying path, the printing device is used to print an image on a printing medium; A detection device, used for detecting the printed sample, wherein the detection device and the printing device are respectively located on two opposite sides of the first conveying device; a second conveying device for conveying the printed sample to the detection position along a second conveying path different from the first conveying path; The first conveying device is provided with an opening, and the second conveying device is located below the opening; further comprising a conveying path switching mechanism, the conveying path switching mechanism is used to switch the conveying path of the printing medium between the first conveying path and the second conveying path; the printing device comprises a nozzle; The switching position of the first conveying path and the second conveying path is located directly below the nozzle; the conveying path switching mechanism includes an opening and closing mechanism for closing or opening the opening; The second conveying device comprises a roller and a first driver, the first driver is in driving connection with the roller, and the first driver is used to drive the roller to rotate relative to the detection device; the first conveying device is provided with a first conveying surface moving along a first conveying path, and the circumferential surface of the roller is tangent to the first conveying surface; The conveying path switching mechanism switches the conveying path of the printing medium according to whether the printing medium is a printing sample or a formal image, thereby conveying the printing sample to the detection position for detection, and conveying the printing medium used for formal printing to the next link after printing is completed according to the detection result.

2. Automatic detection of Onepass printing devices, characterized by, include: a first conveying device for conveying the printing medium along a first conveying path; A printing device, located above the first conveying path, the printing device is used to print an image on a printing medium; A detection device, used for detecting the printed sample, wherein the detection device and the printing device are respectively located on two opposite sides of the first conveying device; a second conveying device for conveying the printed sample to the detection position along a second conveying path different from the first conveying path; The first conveying device is provided with an opening, and the second conveying device is located below the opening; further comprising a conveying path switching mechanism, the conveying path switching mechanism is used to switch the conveying path of the printing medium between the first conveying path and the second conveying path; the printing device comprises a nozzle; The switching position of the first conveying path and the second conveying path is located directly below the nozzle; the conveying path switching mechanism includes an opening and closing mechanism for closing or opening the opening; The second conveying device comprises a second conveying surface, a third conveying surface and a second driver, the second driver is drivingly connected with the second conveying surface and the third conveying surface, and the third conveying surface is inclined at a first preset angle relative to the second conveying surface; The conveying path switching mechanism switches the conveying path of the printing medium according to whether the printing medium is a printing sample or a formal image, thereby conveying the printing sample to the detection position for detection, and conveying the printing medium used for formal printing to the next link after printing is completed according to the detection result.

3. The automatic detection Onepass printing device according to claim 2, characterized in that: The second conveying surface and the third conveying surface are perpendicular to each other. The detection device includes an image acquisition component, and the image acquisition component is perpendicular to the third conveying surface.

4. Onepass printing method, characterized in that, Printing using the Onepass printing device according to any one of claims 1 to 3, the method comprising the following steps: S1: Printing a print sample according to the print data of the print sample; S2: conveying the printed sample along the second conveying path to a detection position for detection; S3: transporting the printing medium for formal printing along the first transport path to below the nozzle; S4: Printing the target image on the printing medium for formal printing according to the detection result.

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