Ink test printing device

Abstract

The invention relates to an ink test printing device which comprises a frame unit, a machine head unit, an ink box unit, a medium conveying unit and a UV lamp unit, the frame unit is provided with a cross beam unit and a guide beam unit, the machine head unit is arranged on the guide beam unit and is arranged on a machine head frame supporting piece of the frame unit and the cross beam unit in a crossing mode, and the cross beam unit is arranged on the machine head frame supporting piece. The ink box unit is arranged on the machine head unit and can synchronously move up and down along with the machine head unit; the ink box unit comprises an ink box stand column arranged on the machine head unit, an ink box body which is arranged on the ink box stand column and can ascend and descend vertically relative to the ink box stand column, and a liquid level monitoring unit which is arranged on the ink box stand column and used for monitoring the liquid level of ink in the ink box body. And the height of the ink box body is adjusted according to the change of the liquid level in the ink box body monitored by the liquid level monitoring unit, so that the ink at the nozzle is subjected to constant or basically constant negative pressure. A negative pressure device is not needed, the angle of the machine head bottom plate can be finely adjusted so as to adjust the angle of the spray head, and downward movement of the machine head bottom plate can be guided and positioned.

Description

Technical Field

[0001] The invention relates to the field of inkjet printers, and in particular to an ink test printing device. Background Art

[0002] An inkjet printer is a printing device that uses a fine nozzle to spray liquid ink onto paper or other media to form text or images. Its working principle is to convert color ink into tiny droplets to achieve full-color output. It supports high-resolution and high-precision color printing. Usually, a secondary ink cartridge and a print nozzle are provided on the print carriage of an inkjet printer. The secondary ink cartridge is connected to the main ink cartridge to replenish the ink in the secondary ink cartridge. The reason for setting up the secondary ink cartridge is mainly to reduce the weight of the print carriage. When the print carriage is too heavy, it is easy to affect the printing accuracy. Since the secondary ink cartridge is higher than the print nozzle, there is a certain level difference between the ink level in the secondary ink cartridge and the ink at the print nozzle. The existence of the level difference makes it easy for the ink in the secondary ink cartridge to drip from the nozzle, thereby affecting the printing quality. In order to solve this problem, it is necessary to connect a negative pressure device to the secondary ink cartridge, and use the negative pressure device to offset the positive pressure generated by the level difference and make the ink droplets at the nozzle form a concave state on the surface and make the ink at the nozzle as much as possible under constant negative pressure, and then use the print nozzle to perform inkjet printing. Since the liquid level in the secondary ink cartridge is in dynamic change, it is necessary to adjust the negative pressure generated by the negative pressure device at all times, and the adjustment of the negative pressure device is complicated and expensive. For large industrial inkjet printers, negative pressure devices are indispensable, but for inkjet printers used for ink testing, the test ink is encapsulated in the ink cartridge and the ink cartridge has a certain negative pressure. After a box of ink is used up, the test is basically completed, so there is no need to replenish the ink through the main ink cartridge. Although it is feasible to stabilize the negative pressure of the test ink through a negative pressure device, it invisibly increases the complexity of control and the cost of the equipment. At the same time, in order to ensure the accuracy and quality of printing, the parallelism of the nozzle and the printing medium must be ensured. The nozzle is installed on the bottom plate, so it is necessary to ensure the parallelism of the bottom plate and the printing medium. However, due to the processing accuracy, the dead weight of the printing carriage, the lifting adjustment and other reasons, the bottom plate will be slightly tilted, and at this time, the angle of the nozzle or the bottom plate needs to be adjusted. The method of adjusting each nozzle individually is time-consuming and labor-intensive, and it is difficult to ensure uniformity. Therefore, it is a simple and effective method to adjust the bottom plate as a whole while ensuring the installation accuracy of the nozzle on the bottom plate. In addition, when inkjet printers are idle for a long time, the nozzles are prone to clogging, resulting in high ink consumption costs. The conventional method is to use an end cap to cover the bottom of the nozzle. During printing, the distance between the nozzle and the print medium is relatively close. When adding the end cap, the bottom plate needs to be lifted to provide space for capping the nozzle. When inkjet printing again, the cap is removed and the bottom plate is lowered to bring the nozzle close to the print medium. However, due to the lack of a positioning and limiting device, deviations are prone to occur when the bottom plate is lowered.

[0003] In view of this, the present invention provides an ink test printing device, which monitors the liquid level height of the ink in the ink cartridge body in real time through a liquid level detection unit and adjusts the height of the ink cartridge body so that the ink at the nozzle is under a substantially constant negative pressure, thus eliminating the need for a negative pressure device. By suspending the bottom plate and cooperating with the spherical head set screw, and simultaneously utilizing the downward pressure generated when the cylinder contracts, the suspended bottom plate is pressed against the spherical head set screw to achieve the purpose of finely adjusting the angle of the bottom plate. And by providing positioning pins on the positioning plate and providing a strip hole on the bottom plate to guide the bottom plate to descend to the correct position. Summary of the Invention

[0004] The present invention aims to provide an ink test printing device to solve the deficiencies existing in the prior art. The technical problems to be solved by the present invention are achieved through the following technical solutions.

[0005] An ink test printing device includes a frame unit, a head unit, an ink cartridge unit, a media conveying unit, and a UV lamp unit. The improvement lies in that: a cross beam unit and a guide beam unit are provided on the frame unit; the head unit is arranged on the guide beam unit and straddles the head frame support of the frame unit and the cross beam unit; the ink cartridge unit is arranged on the head unit and can move up and down synchronously with the head unit; the ink cartridge unit includes an ink cartridge column arranged on the head unit, an ink cartridge body arranged on the ink cartridge column and capable of moving up and down relative to the ink cartridge column, and a liquid level monitoring unit arranged on the ink cartridge column and used for monitoring the liquid level of the ink in the ink cartridge body. The height of the ink cartridge body is adjusted according to the change of the liquid level in the ink cartridge body monitored by the liquid level monitoring unit so that the ink at the nozzle is under a constant or substantially constant negative pressure; the media conveying unit is arranged on the cross beam unit and can slide relative to the cross beam unit, and the UV lamp unit is arranged on the guide beam unit and is located between adjacent head units.

[0006] Preferably, the ink cartridge unit further includes an ink cartridge slide seat arranged on the ink cartridge column, an ink cartridge motor and an ink cartridge screw arranged on the ink cartridge slide seat, an ink cartridge slider screwed on the ink cartridge screw, and an ink cartridge mounting seat arranged on the ink cartridge slider. The ink cartridge body is mounted on the ink cartridge mounting seat, and the ink cartridge motor drives the ink cartridge screw to rotate to drive the ink cartridge slider and the ink cartridge mounting seat to move up and down, thereby adjusting the height of the ink cartridge body.

[0007] Preferably, the liquid level monitoring unit includes a slide rod mounting seat arranged on the ink cartridge column, a switch slide rod arranged on the slide rod mounting seat, a switch slide table arranged on the switch slide rod, a proximity switch seat arranged on the switch slide table, and a proximity switch arranged on the proximity switch seat. The proximity switch is used for monitoring the position of the ink liquid level in the ink cartridge body.

[0008] Preferably, the head unit includes a head cylinder, a head side plate connected to the head cylinder and driven by the head cylinder to move up and down. A through hole is provided at the lower part of the head side plate, and a set screw is slidably inserted through the through hole. The lower end of the set screw passes through the head side plate and is fixed to the head bottom plate. A compression spring is sleeved on the set screw, and the compression spring is located between the head side plate and the head bottom plate. A head frame positioning plate is provided on the head frame support, and a head crossbeam positioning plate is provided on the head crossbeam support of the crossbeam unit. Ball head set screws are provided on both the head crossbeam positioning plate and the head frame positioning plate, and the number of the ball head set screws is not less than three. The head cylinder drives the head bottom plate to descend until the lower surface of the head bottom plate abuts against some of the ball head set screws and continues to descend so that the lower surface of the head bottom plate abuts against all the ball head set screws.

[0009] Preferably, the head unit further includes a head back plate, which is fixed to the cylinder telescopic part of the head cylinder, and the head side plate is arranged on the head back plate.

[0010] Preferably, the head cylinder is arranged on the head guide beam slide of the guide beam unit. A head guide beam slider is provided on the head guide beam slide, and the head guide beam slider is matched with the head guide beam slide rail of the guide beam unit to realize the movement of the head unit relative to the guide beam unit.

[0011] Preferably, a head guide beam fixing part is provided on the head guide beam slide, and the head unit is fixed relative to the guide beam unit through the head guide beam fixing part.

[0012] Preferably, the number of the set screws is at least four, and the at least four set screws are arranged at least at the four corner positions of the head bottom plate.

[0013] Preferably, the ink cartridge column is arranged on the head bottom plate.

[0014] Preferably, a positioning pin is provided on the head frame positioning plate, and a strip hole matched with the positioning pin is provided on the head bottom plate. The downward movement of the head bottom plate is guided and positioned through the cooperation of the positioning pin and the strip hole.

[0015] In the present invention, the liquid level monitoring unit is used to monitor the change of the ink liquid level in the ink cartridge body and adjust the height of the ink cartridge body, so that the height difference between the ink at the nozzle and the ink liquid level in the ink cartridge body remains constant or substantially constant. Furthermore, the negative pressure exerted on the ink at the nozzle remains constant or substantially constant, and thus there is no need to additionally provide a negative pressure device. The head cylinder drives the head side plate and the head bottom plate to move up and down to provide space for covering the end cap. The head bottom plate is suspended on the head side plate through a set screw and a compression spring, and the suspension method provides an adjustment space for the fine adjustment of the head bottom plate. At least three ball head set screws determine a plane. The head cylinder moves downward and uses the compression spring to make the lower surface of the head bottom plate fully contact with the highest points of all the ball head set screws, thereby achieving the purpose of finely adjusting the angle of the head bottom plate. The present invention realizes the guiding and positioning of the downward movement of the head bottom plate by providing a positioning pin and a strip hole. The present invention can finely adjust the angle of the head bottom plate to adjust the angle of the nozzle, and can guide and position the downward movement of the head bottom plate. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic structural diagram of the head unit in the present invention;

[0018] Figure 3 is a front view structural diagram of the head unit and the ink cartridge unit in the present invention;

[0019] Figure 4 is a three-dimensional structural diagram of the head unit and the ink cartridge unit in the present invention;

[0020] The reference numerals in the drawings are as follows: 10, frame unit; 11, head frame support; 12, head frame positioning plate; 20, crossbeam unit; 21, head crossbeam support; 22, head crossbeam positioning plate; 30, guide beam unit; 31, head guide beam slide seat; 32, head guide beam slider; 33, head guide beam slide rail; 34, head guide beam fixing member; 40, head unit; 41, head cylinder; 411, cylinder fixing part; 412, cylinder telescopic part; 42, head back plate; 43, head side plate; 44, head bottom plate; 45, set screw; 46, compression spring; 47, ball head set screw; 48, positioning pin; 49, nozzle; 50, ink cartridge unit; 51, ink cartridge body; 52, ink cartridge mounting seat; 53, ink cartridge slider; 54, ink cartridge screw; 55, ink cartridge motor; 56, ink cartridge slide seat; 57, ink cartridge column; 58, liquid level monitoring unit; 581, proximity switch; 582, proximity switch seat; 583, switch slide table; 584, switch slide rod; 585, slide rod mounting seat; 60, UV lamp unit; 70, medium conveying unit. Detailed implementation manners

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] Embodiment 1:

[0023] Referring to Figures 1 to 4 As shown, an ink test printing device includes a frame unit 10, a print head unit 40, an ink cartridge unit 50, a media conveying unit 70, and a UV lamp unit 60. The improvement lies in that: a cross beam unit 20 and a guide beam unit 30 are provided on the frame unit 10. The print head unit 40 is arranged on the guide beam unit 30 and straddles the print head frame support 11 of the frame unit 10 and the cross beam unit 20. The ink cartridge unit 50 is arranged on the print head unit 40 and can move up and down synchronously with the print head unit 40. The ink cartridge unit 50 includes an ink cartridge column 57 arranged on the print head unit 40, an ink cartridge body 51 arranged on the ink cartridge column 57 and capable of moving up and down relative to the ink cartridge column 57, and a liquid level monitoring unit 58 arranged on the ink cartridge column 57 and used for monitoring the liquid level of the ink in the ink cartridge body 51. The height of the ink cartridge body 51 is adjusted according to the change of the liquid level in the ink cartridge body 51 monitored by the liquid level monitoring unit 58 so that the ink at the print head 49 is under a constant or substantially constant negative pressure. The media conveying unit 70 is arranged on the cross beam unit 20 and can slide relative to the cross beam unit 20. The UV lamp unit 60 is arranged on the guide beam unit 30 and is located between adjacent print head units 40.

[0024] In this embodiment, the liquid level monitoring unit 58 is used to monitor the change of the liquid level of the ink in the ink cartridge body 51 and adjust the height of the ink cartridge body 51, so that the height difference between the ink at the print head 49 and the liquid level of the ink in the ink cartridge body 51 remains constant or substantially constant. Furthermore, the negative pressure received by the ink at the print head 49 remains constant or substantially constant, and thus there is no need to additionally provide a negative pressure device. In this way, the complexity of the operation and the cost of the equipment can be reduced.

[0025] Furthermore, the cross beam unit 20 includes a print head cross beam support 21, and the print head unit 40 straddles the print head cross beam support 21.

[0026] Further, the ink cartridge unit 50 further includes an ink cartridge slide base 56 disposed on the ink cartridge column 57, an ink cartridge motor 55 and an ink cartridge screw rod 54 disposed on the ink cartridge slide base 56, an ink cartridge slider 53 screwed onto the ink cartridge screw rod 54, and an ink cartridge mounting base 52 disposed on the ink cartridge slider 53. The ink cartridge body 51 is mounted on the ink cartridge mounting base 52. The ink cartridge motor 55 drives the ink cartridge screw rod 54 to rotate to drive the ink cartridge slider 53 and the ink cartridge mounting base 52 to move up and down, thereby adjusting the height of the ink cartridge body 51.

[0027] In this embodiment, the ink cartridge slide base 56 is fixed to the ink cartridge column 57 by screws. At the same time, a plurality of screw holes are reserved on the ink cartridge column 57. When it is necessary to adjust the height of the ink cartridge slide base 56 relative to the ink cartridge column 57, the screws can be unscrewed, the ink cartridge slide base 56 can be installed at a suitable position, and then the screws can be tightened again, so that the height of the ink cartridge body 51 can be manually adjusted according to the characteristics of different inks, that is, the initial height of the ink liquid level in the ink cartridge body 51 is manually adjusted. During the printing test, according to the drop height of the ink liquid level in the ink cartridge body 51 monitored by the liquid level monitoring unit 58, the ink cartridge motor 55 drives the ink cartridge screw rod 54 to rotate, and the ink cartridge slider 53 screwed onto the ink cartridge screw rod 54 moves upward to drive the ink cartridge mounting base 52 and the ink cartridge body 51 mounted on the ink cartridge mounting base 52 to move upward, thereby raising the height of the ink liquid level in the ink cartridge body 51 to offset the change in the negative pressure of the ink at the nozzle 49 caused by the drop of the ink liquid level, so as to keep the negative pressure of the ink at the nozzle 49 constant or substantially constant. That is, by raising the height of the ink cartridge body 51 to maintain the stability of the negative pressure of the ink at the nozzle, there is no need to set up a negative pressure device, thereby reducing the complexity of the operation and the cost of the equipment.

[0028] Further, the liquid level monitoring unit 58 includes a slide rod mounting base 585 disposed on the ink cartridge column 57, a switch slide rod 584 disposed on the slide rod mounting base 585, a switch slide table 583 disposed on the switch slide rod 584, a proximity switch base 582 disposed on the switch slide table 583, and a proximity switch 581 disposed on the proximity switch base 582. The proximity switch 581 is used to monitor the position of the ink liquid level in the ink cartridge body 51.

[0029] In this embodiment, the slide rod mounting seat 585 is fixed to the ink cartridge column 57 by screws. At the same time, a plurality of screw holes are reserved on the ink cartridge column 57, and the mounting position of the slide rod mounting seat 585 is adjusted by screws and screw holes. The switch slide 583 is fixed to the ink cartridge column 57 by screws to keep the relative fixation between the switch slide 583 and the switch slide rod 584. When the position of the switch slide 583 needs to be adjusted, loosen the screws and then move the switch slide 583 to slide along the switch slide rod 584 to a suitable position and then tighten the screws. The proximity switch seat 582 provided on the switch slide 583 and the proximity switch 581 provided on the proximity switch seat 582 are adjusted to a suitable position. The slide rod mounting seat 585 and the switch slide 583 can provide as large a stroke as possible for the height adjustment of the proximity switch 581 so as to meet the test requirements of inks with different characteristics. The proximity switch 581 is used to monitor the position of the ink liquid level in the ink cartridge body 51. When the ink liquid level drops, the proximity switch 581 emits a signal, and the ink cartridge motor 55 starts and drives the ink cartridge screw 54 to rotate, thereby driving the ink cartridge slider 53, the ink cartridge mounting seat 52 and the ink cartridge body 51 to move upward to raise the height of the ink liquid level. When the proximity switch 581 detects the ink liquid level again, the proximity switch 581 emits a signal again, and the ink cartridge motor 55 stops. This process is repeated to keep the ink liquid level basically at the same height, thereby ensuring that the ink at the nozzle 49 is under a constant or substantially constant negative pressure.

[0030] Embodiment 2:

[0031] On the basis of Embodiment 1, with reference to Figures 2 to 4 As shown, the head unit 40 includes a head cylinder 41 and a head side plate 43 connected to the head cylinder 41 and driven by the head cylinder 41 to move up and down. A through hole is provided in the lower part of the head side plate 43, and a set screw 45 is slidably inserted through the through hole. The lower end of the set screw 45 passes through the head side plate 43 and is fixed to the head bottom plate 44. A compression spring 46 is sleeved on the set screw 45, and the compression spring 46 is located between the head side plate 43 and the head bottom plate 44. A head frame positioning plate 12 is provided on the head frame support member 11, and a head cross beam positioning plate 22 is provided on the head cross beam support member 21 of the cross beam unit 20. Ball head set screws 47 are provided on both the head cross beam positioning plate 22 and the head frame positioning plate 12, and the number of the ball head set screws 47 is not less than three. The head cylinder 41 drives the head bottom plate 44 to move downward until the lower surface of the head bottom plate 44 abuts against some of the ball head set screws 47 and continues to move downward. The pressure of the downward movement of the head cylinder 41 is transmitted to the head bottom plate 44 through the compression spring 46 so that the lower surface of the head bottom plate 44 abuts against all the ball head set screws 47.

[0032] In this embodiment, the head cylinder 41 drives the head side plate 43 and the head bottom plate 44 to move up and down, thereby providing space for covering the end cap; the head bottom plate 44 is suspended on the head side plate 43 by a set screw 45 and a compression spring 46, and the suspension method provides an adjustment space for the fine adjustment of the head bottom plate 44; at least three ball head set screws 47 determine a plane, and the head cylinder 41 moves downward and uses the compression spring 46 to make the lower surface of the head bottom plate 44 completely abut against the highest points of all the ball head set screws 47, so as to achieve the purpose of finely adjusting the angle of the head bottom plate 44.

[0033] When this embodiment works, the head cylinder 41 moves downward to drive the head bottom plate 44 to move downward. When the head bottom plate 44 is slightly inclined, the lower surface of the head bottom plate 44 first contacts some of the ball head set screws 47 during the downward movement, and the contact points at this time are not at the highest points of the ball head set screws 47. The head cylinder 41 continues to move downward. At this time, the tilted part of the head bottom plate 44 contacts other ball head set screws 47 under the drive of the head cylinder 41 and the pressure of the compression spring 46, and the part of the head bottom plate 44 that has already contacted the ball head set screws 47 compresses the compression spring 46 until the lower surface of the head bottom plate 44 contacts all the ball head set screws 47. At this time, the contact points are at the highest points of the ball head set screws 47. According to the principle that three points determine a plane, at least three ball head set screws 47 can determine a plane. After the head cylinder 41 moves downward to make the lower surface of the head bottom plate 44 abut against all the ball head set screws 47, the plane where the head bottom plate 44 is located is parallel to the plane where all the ball head set screws 47 are located. On the premise that the plane where all the ball head set screws 47 are located is parallel to the plane where the printing medium is located and the plane where the head bottom plate 44 and the nozzle 49 are located is parallel, the planes where the head bottom plate 44 and the nozzle 49 are located are both parallel to the plane where the printing medium is located, so as to achieve the purpose of adjusting the tilt angle of the head.

[0034] This embodiment uses the set screw 45 and the compression spring 46 to suspend the head bottom plate 44 on the head side plate 43, and uses the downward pressure of the head cylinder 41 to press the head bottom plate 44 against all the ball head set screws 47, so as to achieve the purpose of finely adjusting the head bottom plate 44.

[0035] Further, a positioning pin 48 is provided on the head frame positioning plate 12, and a strip hole matching the positioning pin 48 is provided on the head bottom plate 44. The cooperation of the positioning pin 48 and the strip hole is used to guide and position the downward movement of the head bottom plate 44.

[0036] In this embodiment, the downward movement of the machine head bottom plate 44 is guided and positioned by setting the positioning pin 48 and the strip-shaped hole.

[0037] Furthermore, the number of the dowel screws 45 is at least four, and the at least four dowel screws 45 are disposed at least at four corner positions of the machine head bottom plate 44.

[0038] Furthermore, the upper end of the compression spring 46 is connected or not connected to the lower surface of the machine head side plate 45, and the lower end of the compression spring 46 is connected or not connected to the upper surface of the machine head bottom plate 44.

[0039] Furthermore, the machine head frame positioning plate 12 is disposed on the machine head frame support member 11 of the frame unit 10.

[0040] Furthermore, the machine head crossbeam positioning plate 22 is disposed on the machine head crossbeam support member 21 of the crossbeam unit 20.

[0041] Furthermore, the ink cartridge column 57 is disposed on the machine head bottom plate 44. In this embodiment, the cylinder telescopic part 412 of the machine head cylinder 41 drives the machine head back plate 42 to move up and down, the machine head back plate 42 drives the machine head side plate 43 and the machine head bottom plate 44 to move up and down, the machine head bottom plate 44 pushes the ink cartridge column 57 to move up and down, and the ink cartridge body 51 and the proximity switch 581 disposed on the ink cartridge column 57 move up and down synchronously, so as to realize the synchronous up and down movement of the ink cartridge unit 50 and the machine head unit 40. At the same time, since the dowel screws 45 and the compression spring 46 are adopted to connect the machine head bottom plate 44 and the machine head side plate 43, that is, the machine head bottom plate 44 is connected to the machine head side plate 43 in a hanging manner, during the process that the machine head bottom plate 44 contacts with all the ball head set screws 47, that is, when the machine head bottom plate 44 finely adjusts the inclination angle, the relative height between the machine head bottom plate 44 and the machine head side plate 43, the machine head back plate 42 and the machine head cylinder 41 will change slightly. By disposing the ink cartridge column 57 on the machine head bottom plate 44 instead of other components, the height difference between the ink at the nozzle 49 and the ink liquid level in the ink cartridge body 51 can be ensured to be constant, so as to ensure that the negative pressure received by the ink at the nozzle is constant or basically constant as much as possible.

[0042] Furthermore, the machine head unit 40 further includes a machine head back plate 42, the machine head back plate 42 is fixed on the cylinder telescopic part 412 of the machine head cylinder 41, and the machine head side plate 43 is disposed on the machine head back plate 42.

[0043] In this embodiment, the head side plate 43 is connected to the head cylinder 41 through the head back plate 42 and is driven by the head cylinder 41 to move up and down. The head side plate 43 drives the head bottom plate 44 to move up and down through the set screw 45 and transfers the pressure of the downward movement of the head cylinder 41 to the head bottom plate 44 through the compression spring 46, so that the head bottom plate 44 makes an adaptive adjustment of the tilt angle under the reverse abutment of the ball head set screw 47.

[0044] Further, the head cylinder 41 is arranged on the head guide beam slide 31 of the guide beam unit 30; furthermore, the cylinder fixing part 411 of the head cylinder 41 is arranged on the head guide beam slide 31.

[0045] Further, a head guide beam slider 32 is arranged on the head guide beam slide 31, and the head guide beam slider 32 is matched with the head guide beam slide rail 33 of the guide beam unit 30 to realize the movement of the head unit 40 relative to the guide beam unit 30.

[0046] Further, a head guide beam fixing part 34 is arranged on the head guide beam slide 31, and the head unit 40 is fixed relative to the guide beam unit 30 through the head guide beam fixing part 34.

[0047] In this embodiment, the movement of the head unit 40 relative to the guide beam unit 30 is realized by setting the head guide beam slide 31, the head guide beam slider 32 and the head guide beam slide rail 33, and the fixation of the head unit 40 relative to the guide beam unit 30 is realized by setting the head guide beam fixing part 34. The reason for moving the head unit 40 is that during actual use, it is necessary to adjust the distances between adjacent nozzles and between the nozzles and the UV lamp unit to adapt to the requirements of different types of inks, inks of different colors, and irradiation time.

[0048] It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments described according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0051] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0052] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "above" etc. may be used here to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" other devices or structures. Thus, the exemplary term "above" can include both the orientation of "above" and "below". The device can also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and corresponding interpretations will be made for the spatial relative descriptions used here.

[0053] In the detailed description above, reference has been made to the drawings, which form a part hereof. In the drawings, like reference signs typically identify like components, unless the context indicates otherwise. The illustrated embodiments described in the detailed description, the drawings and the claims are not meant to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented here.

[0054] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ink test printing device, comprising a frame unit (10), a head unit (40), an ink cartridge unit (50), a medium conveying unit (70), and a UV lamp unit (60), characterized in that: The frame unit (10) is provided with a crossbeam unit (20) and a guide beam unit (30); the head unit (40) is provided on the guide beam unit (30) and straddles the head frame support (11) of the frame unit (10) and the crossbeam unit (20); the ink cartridge unit (50) is provided on the head unit (40) and can move up and down synchronously with the head unit (40); the ink cartridge unit (50) comprises an ink cartridge column (57) provided on the head unit (40), and an ink cartridge body provided on the ink cartridge column (57) and can be lifted up and down relative to the ink cartridge column (57). (51), a liquid level monitoring unit (58) disposed on the ink cartridge column (57) and used to monitor the ink level in the ink cartridge body (51), and adjusting the height of the ink cartridge body (51) according to the change of the liquid level in the ink cartridge body (51) monitored by the liquid level monitoring unit (58) so that the ink at the nozzle (49) is subjected to a constant or substantially constant negative pressure; the medium conveying unit (70) is disposed on the beam unit (20) and can slide relative to the beam unit (20), and the UV lamp unit (60) is disposed on the guide beam unit (30) and is located between adjacent head units (40).

2. An ink test printing device according to claim 1, characterized in that: The ink cartridge unit (50) further comprises an ink cartridge slide (56) arranged on the ink cartridge column (57), an ink cartridge motor (55) and an ink cartridge screw (54) arranged on the ink cartridge slide (56), an ink cartridge slider (53) screwed on the ink cartridge screw (54), and an ink cartridge mounting seat (52) arranged on the ink cartridge slider (53); the ink cartridge body (51) is mounted on the ink cartridge mounting seat (52); the ink cartridge motor (55) drives the ink cartridge screw (54) to rotate so as to drive the ink cartridge slider (53) and the ink cartridge mounting seat (52) to move up and down, thereby adjusting the height of the ink cartridge body (51).

3. The ink test printing device according to claim 1, characterized in that: The liquid level monitoring unit (58) includes a slide rod mounting seat (585) arranged on the ink cartridge column (57), a switch slide rod (584) arranged on the slide rod mounting seat (585), a switch slide (583) arranged on the switch slide rod (584), a proximity switch seat (582) arranged on the switch slide (583), and a proximity switch (581) arranged on the proximity switch seat (582), wherein the proximity switch (581) is used to monitor the position of the ink liquid level in the ink cartridge body (51).

4. The ink test printing device according to claim 1, characterized in that: The machine head unit (40) comprises a machine head cylinder (41), a machine head side plate (43) connected to the machine head cylinder (41) and driven by the machine head cylinder (41) to move up and down, a through hole is provided at the lower part of the machine head side plate (43) and a plug screw (45) is slidably inserted into the through hole, the lower end of the plug screw (45) passes through the machine head side plate (43) and is fixed to the machine head bottom plate (44), a compression spring (46) is sleeved on the plug screw (45), and the compression spring (46) is located between the machine head side plate (43) and the machine head bottom plate (44); the machine head frame support (11 ) is provided with a head frame positioning plate (12), a head beam positioning plate (22) is provided on the head beam support (21) of the beam unit (20), and ball head top screws (47) are provided on the head beam positioning plate (22) and the head frame positioning plate (12), and the number of the ball head top screws (47) is not less than three; the head cylinder (41) drives the head bottom plate (44) to move downward until the lower surface of the head bottom plate (44) abuts against part of the ball head top screws (47) and continues to move downward so that the lower surface of the head bottom plate (44) abuts against all of the ball head top screws (47).

5. An ink test printing device according to claim 4, characterized in that: The head unit (40) further comprises a head back plate (42), wherein the head back plate (42) is fixed on the cylinder telescopic portion (412) of the head cylinder (41), and the head side plate (43) is arranged on the head back plate (42).

6. An ink test printing device according to claim 4, characterized in that: The machine head cylinder (41) is arranged on a machine head guide beam slide (31) of the guide beam unit (30); a machine head guide beam slider (32) is arranged on the machine head guide beam slide (31); the machine head guide beam slider (32) cooperates with a machine head guide beam slide rail (33) of the guide beam unit (30) to realize the movement of the machine head unit (40) relative to the guide beam unit (30).

7. An ink test printing device according to claim 6, characterized in that: The machine head guide beam slide seat (31) is provided with a machine head guide beam fixing member (34), and the machine head unit (40) is fixed relative to the guide beam unit (30) via the machine head guide beam fixing member (34).

8. An ink test printing device according to claim 4, characterized in that: The number of the plug screws (45) is at least four, and the at least four plug screws (45) are at least arranged at four corner positions of the machine head bottom plate (44).

9. The ink test printing device according to claim 4, characterized in that: The ink cartridge column (57) is arranged on the head bottom plate (44).

10. The ink test printing device according to claim 4, characterized in that: The machine head frame positioning plate (12) is provided with a positioning pin (48), and the machine head base plate (44) is provided with a strip hole matching the positioning pin (48), and the downward movement of the machine head base plate (44) is guided and positioned by the cooperation between the positioning pin (48) and the strip hole.

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