Color three-dimensional curved surface ink-jet printing method

Abstract

The invention discloses a color three-dimensional curved surface ink-jet printing method, which belongs to the technical field of ink-jet printing process, and comprises the following steps of: firstly, pressing a pneumatic opening and closing unit to open a clamping unit, and then stably clamping a product to be printed; then the nozzle movement control module drives the multi-angle ink jet control module and the ink jet printing unit to move to the position above the product to be printed; the nozzle movement control module and the multi-angle ink-jet control module are controlled to cooperate with each other so as to drive the ink-jet printing unit to perform ink-jet printing treatment on the surface of a to-be-printed product; the drying module sprays hot air at a preset temperature, so that the ink-jet printing part of the printed product is dried; and after the drying procedure is completed, the operator opens the printing drying part, the pneumatic opening and closing unit presses downwards to enable the clamping unit to release clamping of the product, and the operator takes away the product. The technical problem of how to improve the batch operation efficiency of the curved surface ink-jet printing process is solved.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printing technology, and in particular to a color three-dimensional curved surface inkjet printing method. Background Art

[0002] Inkjet printing is a non-contact, pressure-free, plate-free liquid jet technology. The imaging result is completed directly on the surface of the printing material without the aid of other intermediate carriers. It has the advantages of low noise, easy control, and no restrictions on the thickness and structure of the printing material.

[0003] At present, with the development and improvement of inkjet printing technology, the market share of inkjet printing technology in the digital printing industry has grown rapidly with its excellent color fidelity and resolution. Its application areas are also gradually expanding, including product labels, product logos, packaging design, and barcodes. Since there is no need to use printing plates, inkjet printing technology effectively shortens the printing cycle and greatly reduces production costs, and has broad market prospects. This method does not require printing plates, which can greatly reduce printing time and printing costs. It is a new printing method with great development potential. Industrial-scale flat inkjet printing has achieved remarkable results, and new application research has also begun on the application of special-shaped substrates.

[0004] Based on this, Chinese patent CN117162684A discloses a curved surface printing method and inkjet printing equipment, which includes a workpiece to be printed, the workpiece to be printed includes a curved portion and a positioning portion arranged on the periphery of the curved portion, and a printing area is arranged on the side of the curved portion close to the positioning portion; the curved surface printing method is used for printing in the printing area, and the curved surface printing method includes the following steps: a clamping device clamps the opposite ends of the workpiece to be printed, and moves the workpiece to be printed to the printing position through a driving mechanism, the positioning portion of the workpiece to be printed is positioned with the print head, and one side of the positioning portion is parallel to the nozzle of the print head; the print head starts printing, and moves the print head and / or moves the workpiece to be printed to print a pattern in the printing area. In this way, it is possible to avoid the positioning portion on the curved surface of the printed workpiece, thereby printing a pattern in the printing area.

[0005] However, the curved surface printing method disclosed above still has the technical problem of insufficient printing efficiency. Specifically, in the actual application of inkjet printing technology, different types of inks have different drying methods and times. Generally speaking, solvent-based inks and water-based inks are two types commonly used in inkjet printing. Solvent-based inks usually contain volatile solvents. After printing, the solvent will evaporate rapidly, thereby promoting the rapid drying of the ink. Therefore, in the inkjet printing process using solvent-based inks, the drying time is relatively short, but it is also necessary to ensure that the solvent is completely evaporated to avoid affecting the subsequent process or product quality. In addition, water-based inks mainly use water as a solvent and have a relatively slow drying speed. After inkjet printing, it usually takes a certain amount of time for the water to evaporate, thereby achieving the drying of the ink. In this case, the drying process is particularly important, and it is necessary to ensure that there is enough time for the ink to dry completely.

[0006] Furthermore, the material of the substrate will also affect the drying speed of the ink and the setting of the drying process. For example, for paper substrates, their water absorption is good, and water-based ink can penetrate into the inside of the paper quickly after printing, thereby achieving drying. For non-absorbent materials, such as plastics and metals, it takes longer for the solvent on the surface of the ink to evaporate or the water to evaporate. Three-dimensional curved surface inkjet printed products are usually parts with curved surfaces such as plastics and metals. After inkjet printing, such products usually need to be taken out with a special fixture and placed in a drying room for a preset time to allow the ink to fully dry, and finally complete the inkjet printing process. Summary of the invention

[0007] Based on this, it is necessary to provide a color three-dimensional curved surface inkjet printing method to address the technical problem of how to improve the batch operation efficiency of the curved surface inkjet printing process.

[0008] A color three-dimensional curved surface inkjet printing method, comprising the following steps: S1: The main control module controls the pneumatic opening and closing unit in the clamping control part to press down to open the clamping unit, and the operator then puts the product to be printed on the clamping unit in the printing and drying part. The main control module controls the pneumatic opening and closing unit to rise so that the clamping unit can securely clamp the product to be printed, and the operator then closes the printing and drying part; S2: The main control module controls the nozzle movement control module located in the printing and drying section, so that the nozzle movement control module drives the multi-angle inkjet control module and the inkjet printing unit to move above the product to be printed; S3: The main control module controls the rotation control unit to drive the clamping unit to clamp the product to be printed and rotate at a preset speed. At the same time, the main control module controls the nozzle movement control module and the multi-angle inkjet control module to cooperate with each other to drive the inkjet printing unit to perform inkjet printing on the surface of the product to be printed; S4: After the inkjet printing is completed, the nozzle movement control module drives the multi-angle inkjet control module and the inkjet printing unit to reset, the rotation control unit continues to drive the clamping unit to drive the printed product to rotate at a preset speed, and the drying module sprays hot air at a preset temperature to dry the inkjet printed part of the printed product; S5: After the drying process is completed, the operator opens the printing and drying section, and the pneumatic opening and closing unit is pressed down to release the clamping unit from clamping the product, and the operator can take the product away.

[0009] Furthermore, the method for clamping the product to be printed includes the following steps: S11: After the opening and closing driving cylinder is started, the opening and closing telescopic rod is driven to extend to drive the lifting and moving frame to descend along the limit of the guide connecting arm, and then the lifting and moving frame drives the pressing part to descend to the control end of the pressing clamping fixture to open the clamping fixture. At this time, the opening and closing driving cylinder maintains the extended state of the opening and closing telescopic rod; S12: The operator places the product to be printed into the clamping fixture, and the opening and closing driving cylinder is started to drive the opening and closing telescopic rod to shorten so as to drive the lifting and moving frame to rise along the limit of the guide connecting arm, and then the lifting and moving frame drives the pressing part to rise and leave the control end of the clamping fixture, so that the clamping fixture is closed and clamps the product to be printed.

[0010] Furthermore, the method for controlling the swing and rotation of the product to be printed comprises the following steps: S21: After the clamping unit securely clamps the product to be printed, the first rotary drive motor drives the rotary shaft to rotate and then drives the clamping unit to rotate, thereby rotating the product to be printed; S22: After the rotary drive cylinder is started, it drives the rotating stage to swing, so that the first rotary drive motor and the rotating shaft connected to the rotating stage swing along with the rotating stage; since the product to be printed is clamped on the clamping unit, and the clamping unit is linked with the rotating shaft, the rotary drive cylinder can drive the product to be printed to swing according to a preset program.

[0011] Furthermore, the method for controlling the inkjet printing unit to deflect and swing at a preset angle includes the following steps: S31: After the nozzle movement control module drives the movable connecting arm to move to a preset position, each inkjet printing unit is located above a product to be printed; S32: The second rotation drive motor disposed on the movable connecting arm is started and drives the first bevel gear structure to rotate, and the first bevel gear structure drives the second bevel gear connected to the angle control shaft through meshing transmission, so that the angle control shaft can rotate and drive the angle control connecting block; S33: Each angle control connecting block drives an inkjet printing unit at the same time, so that each inkjet printing unit can be deflected and swung at a preset angle to perform inkjet printing on different curved surfaces of the product to be printed.

[0012] Furthermore, the method for controlling the inkjet printing unit to move along a preset trajectory comprises the following steps: S41: After the longitudinal drive motor disposed at the end of the longitudinal guide rail connecting frame disposed at the upper part of the printing and drying section is started, the longitudinal drive screw rod can be driven to rotate, and then the longitudinal drive screw nut block drives the movable connecting hanger to move longitudinally; S42: After the transverse driving motor disposed at the end of the transverse guide rail connecting frame disposed at the lower part of the movable connecting hanger is started, it can drive the transverse driving screw to rotate, and then the transverse driving screw nut block drives the movable connecting arm to move in the transverse direction; S43: The moving connecting arm drives the multi-angle inkjet control module and the inkjet printing unit to move to a preset inkjet printing working position.

[0013] To summarize, a color three-dimensional curved surface inkjet printing method of the present invention enables the pneumatic opening and closing unit to be pressed down to open the clamping unit so that the product to be printed can be securely clamped, and then the nozzle movement control module drives the multi-angle inkjet control module and the inkjet printing unit to move above the product to be printed; and the nozzle movement control module and the multi-angle inkjet control module are controlled to cooperate with each other to drive the inkjet printing unit to perform inkjet printing on the surface of the product to be printed; the drying module sprays hot air at a preset temperature to dry the inkjet printed part of the printed product; after the drying process is completed, the operator opens the printing and drying section, and the pneumatic opening and closing unit is pressed down to release the clamping unit from clamping the product, and the operator can take the product away. It can be seen that the present invention discloses a color three-dimensional curved surface inkjet printing method, which can make the product itself rotate at any angle, so that all parts of the three-dimensional curved surface of the product are under the inkjet printing unit; at the same time, the nozzle movement control module and the multi-angle control module can cooperate with each other to drive the inkjet printing unit to perform inkjet printing operations on the product at different positions and angles; after completing each batch of inkjet printing, the printed surface of the product can also be dried at the same time to avoid the product being turned over twice when the inkjet surface of the product is not dry, which affects the quality of inkjet printing. Therefore, the color three-dimensional curved surface inkjet printing method of the present invention solves the technical problem of how to improve the batch operation efficiency of the curved surface inkjet printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a color three-dimensional curved surface inkjet printing device of the present invention; Figure 2It is a schematic structural diagram of another direction of a color three-dimensional curved surface inkjet printing device of the present invention; Figure 3 It is a schematic structural diagram of a part of the structure of a color three-dimensional curved surface inkjet printing device of the present invention from another direction; Figure 4 It is a schematic structural diagram of a part of the structure of a color three-dimensional curved surface inkjet printing device of the present invention from another direction; Figure 5 This is a schematic structural diagram of a part of the structure of a color three-dimensional curved surface inkjet printing device according to the present invention from another direction. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0021] Please also read Figures 1 to 5A color three-dimensional curved surface inkjet printing device comprises: a frame module 1, a main control module 2, a printed product clamping control module 3, an inkjet printing unit 4, a multi-angle inkjet control module 5, a nozzle movement control module 6 and a drying module 7; the frame module 1 has a platform structure 101, a physical control unit 102, a clamping control unit 103 and a printing and drying unit 104; the physical control unit 102 is arranged on the upper side of the platform structure 101, and the clamping control unit 103 is arranged between the physical control unit 102 and the printing and drying unit 104. The main control module 2 is respectively arranged in the stage structure 101 and the physical control unit 102, and the printed product clamping control module 3 is arranged in the clamping control unit 103. The printed product clamping control module 3 has a clamping unit 301, a pneumatic opening and closing unit 302 and a rotation control unit 303; the clamping unit 301 extends from the clamping control unit 103 to the printing and drying unit 104; the pneumatic opening and closing unit 302 is arranged in the clamping control unit 103, and the pneumatic opening and closing unit 302 is movably connected to the clamping unit 301; the rotation control unit 303 is arranged in the clamping control unit 103, and the rotation control unit 303 is drivingly connected to the clamping unit 301. The printing and drying section 104 encloses the inkjet printing unit 4, the multi-angle inkjet control module 5 and the nozzle movement control module 6; the inkjet printing unit 4 is movably arranged in the printing and drying section 104, the multi-angle inkjet control module 5 is drivingly connected to the inkjet printing unit 4, and the nozzle movement control module 6 is drivingly connected to the multi-angle inkjet control module 5; the drying module 7 extends from the gantry structure 101 into the printing and drying section 104, and the part of the drying module 7 arranged in the printing and drying section 104 surrounds the periphery of the clamping unit 301. The main control module 2 is electrically connected to the printed matter clamping control module 3, the inkjet printing unit 4, the multi-angle inkjet control module 5, the nozzle movement control module 6 and the drying module 7 respectively.

[0022] Specifically, a method for applying the aforementioned color three-dimensional curved surface inkjet printing device comprises the following steps: S1: The main control module 2 controls the pneumatic opening and closing unit 302 in the clamping control unit 103 to press down to open the clamping unit 301, and the operator then puts the product to be printed on the clamping unit 301 in the printing and drying unit 104. The main control module 2 controls the pneumatic opening and closing unit 302 to rise so that the clamping unit 301 can securely clamp the product to be printed, and the operator then closes the printing and drying unit 104; S2: the main control module 2 controls the nozzle movement control module 6 located in the printing and drying section 104, so that the nozzle movement control module 6 drives the multi-angle inkjet control module 5 and the inkjet printing unit 4 to move above the product to be printed; S3: The main control module 2 controls the rotation control unit 303 to drive the clamping unit 301 to clamp the product to be printed and rotate at a preset speed. At the same time, the main control module 2 controls the nozzle movement control module 6 and the multi-angle inkjet control module 5 to cooperate with each other to drive the inkjet printing unit 4 to perform inkjet printing on the surface of the product to be printed; S4: After the inkjet printing is completed, the nozzle movement control module 6 drives the multi-angle inkjet control module 5 and the inkjet printing unit 4 to reset, the rotation control unit 303 continues to drive the clamping unit 301 to drive the printed product to rotate at a preset speed, and the drying module 7 sprays hot air at a preset temperature to dry the inkjet printed part of the printed product; S5: After the drying process is completed, the operator opens the printing and drying section 104, and the pneumatic opening and closing unit 302 is pressed down to release the clamping unit 301 from clamping the product, and the operator can take the product away.

[0023] It can be seen that the present invention discloses a color three-dimensional curved surface inkjet printing method, which can make the product itself rotate at any angle, so that all parts of the three-dimensional curved surface of the product are under the inkjet printing unit 4; at the same time, the nozzle movement control module 6 and the multi-angle control module 5 can cooperate with each other to drive the inkjet printing unit 4 to perform inkjet printing operations on the product at different positions and angles; after completing each batch of inkjet printing, the printed surface of the product can also be dried at the same time to avoid the product being turned over twice when the inkjet surface of the product is not dry, which affects the quality of inkjet printing. Therefore, the color three-dimensional curved surface inkjet printing method of the present invention solves the technical problem of how to improve the batch operation efficiency of the curved surface inkjet printing process.

[0024] Furthermore, the main control module 2 has an electric control unit 201, a heat dissipation unit 202 and an input / output control unit 203; the electric control unit 201 is arranged in the rack structure 101, the heat dissipation unit 202 is arranged on the adjacent side of the electric control unit 201, and the input / output control unit 203 is arranged in the material control unit 102. The electric control unit 201 can perform electrical control on each component, and the heat dissipation unit 202 is used to perform heat dissipation on the electric control unit 201; the input / output control unit 203 can facilitate the operator to program and control the inkjet printing process and start and stop the inkjet printing process.

[0025] Furthermore, the clamping unit 301 has a clamping fixture 301a and an extending connecting arm 301b; the clamping fixture 301a is arranged in the printing and drying section 104, the extending connecting arm 301b is connected to the clamping fixture 301a, and the extending connecting arm 301b extends from the clamping control section 103 and is passed through the printing and drying section 104.

[0026] Furthermore, the pneumatic opening and closing unit 302 has an opening and closing driving cylinder 302a, a guiding connecting arm 302b, a lifting and moving frame 302c, an opening and closing telescopic rod 302d and a pressing part 302e; the opening and closing driving cylinder 302a and the guiding connecting arm 302b are adjacently arranged at the upper part of the clamping control part 103, the lifting and moving frame 302c is movably connected to the bottom of the guiding connecting arm 302b, the opening and closing driving cylinder 302a is drivingly connected to the opening and closing telescopic rod 302d, and the lower end of the opening and closing telescopic rod 302d is connected to the lifting and moving frame 302c; the pressing part 302e is connected to the lower part of the lifting and moving frame 302c, and the pressing part is drivingly connected to the clamping fixture 301a.

[0027] Thus, in a color three-dimensional curved surface inkjet printing method of the present invention, a method for clamping a product to be printed comprises the following steps: S11: After the opening and closing driving cylinder 302a is started, the opening and closing telescopic rod 302d is driven to extend to drive the lifting and moving frame 302c to descend along the limit of the guide connecting arm 302b, and then the lifting and moving frame 302c drives the pressing part 302e to descend to the control end of the pressing clamping fixture 301a, so that the clamping fixture 301a is opened. At this time, the opening and closing driving cylinder 302a maintains the extended state of the opening and closing telescopic rod 302d; S12: The operator places the product to be printed into the clamping fixture 301a, and the opening and closing driving cylinder 302a is started to drive the opening and closing telescopic rod 302d to shorten, so as to drive the lifting and moving frame 302c to rise along the limit of the guide connecting arm 302b, and then the lifting and moving frame 302c drives the pressing part 302e to rise and leave the control end of the clamping fixture 301a, so that the clamping fixture 301a is closed and clamps the product to be printed.

[0028] Furthermore, the rotation control unit 303 has a rotation drive cylinder 303a, a rotating platform 303b, a first rotation drive motor 303c, a plurality of rotating shafts 303d, a plurality of transmission wheels 303e and a transmission belt 303f; the rotation drive cylinder 303a is arranged at the lower part of the clamping control part 103, the rotating platform 303b is arranged above the rotation drive cylinder 303a, and the rotation drive cylinder 303a is drivingly connected to the rotating platform 303b; the first rotation drive motor 303c is fixedly arranged on the rotating platform 303b, and a plurality of the rotating shafts 303d are evenly arranged and movably arranged on the rotating platform 303b, the first rotation drive motor 303c is drivingly connected to one of the rotating shafts 303d, and a transmission wheel 303e is correspondingly arranged on each of the rotating shafts 303d, and the transmission belt 303f is power-connected to each of the transmission wheels 303e.

[0029] Specifically, in a color three-dimensional curved surface inkjet printing method of the present invention, a method for controlling the swing and rotation of a product to be printed comprises the following steps: S21: After the clamping unit 301 securely clamps the product to be printed, the first rotary drive motor 303c drives the rotary shaft 303d to rotate, thereby driving the clamping unit 301 to rotate, thereby rotating the product to be printed; S22: After the rotary drive cylinder 303a is started, it drives the rotating platform 303b to swing, thereby causing the first rotary drive motor 303c connected to the rotating platform 303b and the rotating shaft 303d to swing along with the rotating platform 303b; since the product to be printed is clamped on the clamping unit 301, and the clamping unit 301 is linked with the rotating shaft 303d, the rotary drive cylinder 303a can drive the product to be printed to swing according to a preset program.

[0030] Furthermore, the multi-angle inkjet control module 5 has a movable connecting arm 501, a second rotary drive motor 502, a first bevel gear structure 503, a second bevel gear structure 504, an angle control shaft 505 and an angle control connecting block 506; the movable connecting arm 501 is connected to the nozzle movement control module 6, the second rotary drive motor 502 is connected to the movable connecting arm 501, and the second rotary drive motor 502 is drivingly connected to the first bevel gear structure 503; the second bevel gear structure 504 is meshingly connected to the first bevel gear structure 503, the angle control shaft 505 is connected to the second bevel gear structure 504, and a plurality of the angle control connecting blocks 506 are evenly distributed and connected on the angle control shaft 505; each of the angle control connecting blocks 506 is connected to a corresponding inkjet printing unit 4.

[0031] Specifically, in a color three-dimensional curved surface inkjet printing method of the present invention, a method for controlling the inkjet printing unit 4 to deflect and swing at a preset angle comprises the following steps: S31: After the nozzle movement control module 6 drives the movable connecting arm 501 to move to a preset position, each inkjet printing unit 4 is located above a corresponding product to be printed; S32: The second rotation driving motor 502 disposed on the movable connecting arm 501 is started and drives the first bevel gear structure 503 to rotate, and the first bevel gear structure 503 drives the second bevel gear 504 connected to the angle control shaft 505 through meshing transmission, so that the angle control shaft 505 can rotate and drive the angle control connecting block 506; S33: Each angle control connection block 506 drives an inkjet printing unit 4 at the same time, so that each inkjet printing unit 4 can be deflected and swung at a preset angle to perform inkjet printing on different curved surfaces of the product to be printed.

[0032] Furthermore, the nozzle movement control module 6 has a longitudinal drive unit 601, a mobile connecting hanger 602 and a transverse drive unit 603; the longitudinal drive unit 601 is connected to the upper part of the printing and drying section 104, the longitudinal drive unit 601 is drive-connected to the mobile connecting hanger 602, and the lower part of the mobile connecting hanger 602 is connected to the transverse drive unit 603; the transverse drive unit 603 is drive-connected to the mobile connecting arm 501.

[0033] Specifically, the longitudinal driving unit 601 has a longitudinal guide rail connecting frame 601a, a longitudinal driving motor 601b, a longitudinal driving screw rod 601c and a longitudinal driving nut block 601d; the longitudinal guide rail connecting frame 601a is arranged at the upper part of the printing and drying section 104, the longitudinal driving motor 601b is arranged at one end of the longitudinal guide rail connecting frame 601a, the longitudinal driving screw rod 601c is movably arranged in the longitudinal guide rail connecting frame 601a, the longitudinal driving motor 601b is drivingly connected to the longitudinal driving screw rod 601c, the longitudinal driving nut block 601d is matched and arranged on the longitudinal driving screw rod 601c, and the upper part of the movable connecting hanger 602 is connected to the longitudinal driving nut block 601d.

[0034] Specifically, the transverse driving unit 603 has a transverse guide rail connecting frame 603a, a transverse driving motor 603b, a transverse driving screw 603c and a transverse driving nut block 603d; the transverse guide rail connecting frame 603a is connected to the lower part of the movable connecting hanger 602, the transverse driving motor 603b is arranged at one end of the transverse guide rail connecting frame 603a, the transverse driving screw 603c is movably arranged in the transverse guide rail connecting frame 603a, the transverse driving motor 603b is drivingly connected to the transverse driving screw 603c, the transverse driving nut block 603d is matched and arranged on the transverse driving screw 603c, and the movable connecting arm 501 is connected to the transverse driving nut block 603d.

[0035] Furthermore, in a color three-dimensional curved surface inkjet printing method of the present invention, a method for controlling the inkjet printing unit 4 to move along a preset trajectory comprises the following steps: S41: After the longitudinal driving motor 601b disposed at the end of the longitudinal guide rail connecting frame 601a disposed at the upper part of the printing and drying section 104 is started, the longitudinal driving screw rod 601c can be driven to rotate, and then the longitudinal driving screw nut block 601d drives the movable connecting hanger 602 to move longitudinally; S42: After the transverse driving motor 603b disposed at the end of the transverse guide rail connecting frame 603a disposed at the lower part of the movable connecting hanger 602 is started, the transverse driving screw rod 603c can be driven to rotate, and then the transverse driving screw nut block 603d drives the movable connecting arm 501 to move in the transverse direction; S43: The connecting arm 501 is moved to drive the multi-angle inkjet control module 5 and the inkjet printing unit 4 to move to a preset inkjet printing working position.

[0036] Specifically, the drying module 7 is a structure combining a pipe and a nozzle, wherein the pipe is connected to an external hot air input pipe, and the hot air nozzle is arranged around the clamping unit 301, so that after the inkjet printing process is completed, the surface of the product can be dried with hot air.

[0037] In summary, a color three-dimensional curved surface inkjet printing method of the present invention allows the pneumatic opening and closing unit 302 to be pressed down to open the clamping unit 301 so that the product to be printed can be securely clamped, and then the nozzle movement control module 6 drives the multi-angle inkjet control module 5 and the inkjet printing unit 4 to move above the product to be printed; and the nozzle movement control module 6 and the multi-angle inkjet control module 5 are controlled to cooperate with each other to drive the inkjet printing unit 4 to perform inkjet printing on the surface of the product to be printed; the drying module 7 sprays hot air at a preset temperature to dry the inkjet printed part of the printed product; after the drying process is completed, the operator opens the printing drying section 104, and the pneumatic opening and closing unit 302 is pressed down to release the clamping unit 301 from clamping the product, and the operator can take the product away. It can be seen that the present invention discloses a color three-dimensional curved surface inkjet printing method, which can make the product itself rotate at any angle, so that all parts of the three-dimensional curved surface of the product are under the inkjet printing unit 4; at the same time, the nozzle movement control module 6 and the multi-angle control module 5 can cooperate with each other to drive the inkjet printing unit 4 to perform inkjet printing operations on the product at different positions and angles; after completing each batch of inkjet printing, the printed surface of the product can also be dried at the same time to avoid the product being turned over twice when the inkjet surface of the product is not dry, which affects the quality of inkjet printing. Therefore, the color three-dimensional curved surface inkjet printing method of the present invention solves the technical problem of how to improve the batch operation efficiency of the curved surface inkjet printing process.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A color three-dimensional curved surface inkjet printing method, characterized in that: It includes the following steps: S1: The main control module (2) controls the pneumatic opening and closing unit (302) located in the clamping control unit (103) to press down to open the clamping unit (301), and the operator then places the product to be printed on the clamping unit (301) located in the printing and drying section (104). The main control module (2) controls the pneumatic opening and closing unit (302) to rise so that the clamping unit (301) can securely clamp the product to be printed, and the operator then closes the printing and drying section (104); S2: the main control module (2) controls the nozzle movement control module (6) located in the printing and drying section (104), so that the nozzle movement control module (6) drives the multi-angle inkjet control module (5) and the inkjet printing unit (4) to move to the top of the product to be printed; S3: The main control module (2) controls the rotation control unit (303) to drive the clamping unit (301) to clamp the product to be printed and rotate at a preset speed. At the same time, the main control module (2) controls the nozzle movement control module (6) and the multi-angle inkjet control module (5) to cooperate with each other to drive the inkjet printing unit (4) to perform inkjet printing on the surface of the product to be printed; S4: After the inkjet printing is completed, the nozzle movement control module (6) drives the multi-angle inkjet control module (5) and the inkjet printing unit (4) to reset, the rotation control unit (303) continues to drive the clamping unit (301) to drive the printed product to rotate at a preset speed, and the drying module (7) sprays hot air at a preset temperature to dry the inkjet printed part of the printed product; S5: After the drying process is completed, the operator opens the printing and drying section (104), and the pneumatic opening and closing unit (302) is pressed down to release the clamping unit (301) from clamping the product, and the operator can take the product away.

2. A color three-dimensional curved surface inkjet printing method according to claim 1, characterized in that: The method for clamping the product to be printed comprises the following steps: S11: After the opening and closing driving cylinder (302a) is started, the opening and closing telescopic rod (302d) is driven to extend to drive the lifting and moving frame (302c) to descend along the limit of the guide connecting arm (302b), and then the lifting and moving frame (302c) drives the pressing part (302e) to descend to the control end of the pressing clamping fixture (301a) to open the clamping fixture (301a). At this time, the opening and closing driving cylinder (302a) maintains the extended state of the opening and closing telescopic rod (302d); S12: The operator places the product to be printed into the clamping fixture (301a), and the opening and closing driving cylinder (302a) is started to drive the opening and closing telescopic rod (302d) to shorten, thereby driving the lifting and moving frame (302c) to rise along the limit of the guide connecting arm (302b), and then the lifting and moving frame (302c) drives the pressing part (302e) to rise and leave the control end of the clamping fixture (301a), so that the clamping fixture (301a) is closed and clamps the product to be printed.

3. The method for color three-dimensional curved surface inkjet printing according to claim 2, characterized in that: The method for controlling the swing and rotation of the product to be printed comprises the following steps: S21: After the clamping unit (301) securely clamps the product to be printed, the first rotary drive motor (303c) drives the rotary shaft (303d) to rotate, thereby driving the clamping unit (301) to rotate, thereby rotating the product to be printed; S22: After the rotary drive cylinder (303a) is started, it drives the rotary platform (303b) to swing, thereby causing the first rotary drive motor (303c) and the rotary shaft (303d) connected to the rotary platform (303b) to swing along with the rotary platform (303b); since the product to be printed is clamped on the clamping unit (301), and the clamping unit (301) and the rotary shaft (303d) are arranged in linkage, the rotary drive cylinder (303a) can drive the product to be printed to swing according to a preset program.

4. The method for color three-dimensional curved surface inkjet printing according to claim 3, characterized in that: The method for controlling the inkjet printing unit (4) to deflect and swing at a preset angle comprises the following steps: S31: the nozzle movement control module (6) drives the movable connecting arm (501) to move to a preset position, so that each inkjet printing unit (4) is located above a corresponding product to be printed; S32: The second rotation drive motor (502) disposed on the movable connecting arm (501) is started and drives the first bevel gear structure (503) to rotate, and the first bevel gear structure (503) drives the second bevel gear (504) connected to the angle control shaft (505) through meshing transmission, so that the angle control shaft (505) can rotate and drive the angle control connecting block (506); S33: Each angle control connection block (506) drives an inkjet printing unit (4) at the same time, so that each inkjet printing unit (4) can be deflected and swung at a preset angle to perform inkjet printing on different curved surfaces of the product to be printed.

5. The method for color three-dimensional curved surface inkjet printing according to claim 4, characterized in that: The method for controlling the inkjet printing unit (4) to move along a preset trajectory comprises the following steps: S41: After the longitudinal driving motor (601b) disposed at the end of the longitudinal guide rail connecting frame (601a) disposed at the upper part of the printing and drying section (104) is started, the longitudinal driving screw rod (601c) can be driven to rotate, thereby causing the longitudinal driving screw nut block (601d) to drive the movable connecting hanger (602) to move longitudinally; S42: After the transverse driving motor (603b) disposed at the end of the transverse guide rail connecting frame (603a) disposed at the lower part of the movable connecting hanger (602) is started, the transverse driving screw rod (603c) can be driven to rotate, thereby causing the transverse driving screw nut (603d) to drive the movable connecting arm (501) to move in the transverse direction; S43: The connecting arm (501) is moved to drive the multi-angle inkjet control module (5) and the inkjet printing unit (4) to move to a preset inkjet printing working position.

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