Surface printing equipment

Abstract

The present invention discloses a surface printing device, including a machine base, a conveying mechanism and a printing mechanism. The conveying mechanism includes a jig and a first driving assembly. The jig includes a base, a first loading mechanism and a second loading mechanism. The first loading mechanism and the second loading mechanism are installed on the base at intervals. The first loading mechanism is used to load a first type of workpiece whose surface to be printed is a flat surface, and the second loading mechanism is used to load a second type of workpiece whose surface to be printed is a curved surface. The first driving assembly drives the base to drive the first loading mechanism and the second loading mechanism to drive the first type of workpiece or the second type of workpiece to move; the printing mechanism is used to print the first type of workpiece loaded on the first loading mechanism, and is used to print the second type of workpiece loaded on the second loading mechanism. The printing mechanism of the present application can print on both the first type of workpiece whose surface to be printed is a flat surface and the second type of workpiece whose surface to be printed is a curved surface. It is suitable for printing different types of workpieces and has a wide applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment, in particular to a surface printing device. Background Art

[0002] As we all know, various colors or patterns are often formed on the surface of the shell of some products for decorative or functional purposes, such as electronic cigarettes or mobile phone covers. The shell of electronic cigarettes is usually made of metal, and various colors or patterns are printed on the surface of the shell for decorative purposes.

[0003] In the prior art, the colors or patterns formed on the surface of the housing, as described above, are typically printed and formed using methods such as screen printing or anodizing. Although inkjet printing is also an option, it is limited in applicability because inkjet printing equipment can only print on a single type of product housing surface, making it difficult to promote and apply. Summary of the Invention

[0004] The main purpose of the present invention is to provide a surface printing device, which aims to solve the technical problem that existing printing devices can only print on the surface of a single type of product shell.

[0005] To achieve the above object, the present invention provides a surface printing device, comprising:

[0006] base;

[0007] A conveying mechanism, the conveying mechanism includes a fixture and a first driving assembly, the fixture includes a base, a first loading mechanism and a second loading mechanism, the first loading mechanism and the second loading mechanism are installed on the base at intervals, the first loading mechanism is used to load a first type of workpiece with a flat surface to be printed, and the second loading mechanism is used to load a second type of workpiece with a curved surface to be printed, the first driving assembly is installed on the machine base and connected to the base to drive the base to drive the first loading mechanism, the second loading mechanism and the first type of workpiece loaded on the first loading mechanism or the second type of workpiece loaded on the first loading mechanism to move;

[0008] A printing mechanism is provided on the machine base, and is used for printing the first type of workpieces loaded on the first loading mechanism, and for printing the second type of workpieces loaded on the second loading mechanism.

[0009] In some embodiments, the first loading mechanism comprises:

[0010] a loading platform, the loading platform having an outer surface and an inner surface opposite to each other, and a first suction hole penetrating the outer surface and the inner surface, the outer surface being used for loading the first workpiece;

[0011] A negative pressure component is connected to the first suction hole, and is used to form a negative pressure below the first suction hole so that the first type of workpiece loaded above the first suction hole is adsorbed on the outer surface under the action of the negative pressure.

[0012] In some embodiments, the first loading mechanism further comprises:

[0013] a turntable, the turntable being disposed on the loading platform and having a loading surface for carrying the first type of workpiece, the turntable being provided with a second suction hole communicating with the first suction hole, the negative pressure component being further configured to create a negative pressure below the second suction hole so that the first type of workpiece loaded above the second suction hole is adsorbed on the loading surface under the action of the negative pressure;

[0014] A second driving assembly is connected to the turntable to drive the turntable to rotate the first type of workpiece.

[0015] In some embodiments, the second loading mechanism comprises:

[0016] a rod body, the rod body being used to penetrate and connect the second type of workpiece;

[0017] A rotation drive assembly is installed on the base and is in transmission connection with the rod body, so as to drive the rod body to drive the second type of workpiece to rotate.

[0018] In some embodiments, the first driving assembly includes a first guide rail and a first power component, the first guide rail is provided on the base, the base is slidably engaged with the first guide rail, and the first power component is installed on the base and connected to the base to drive the base to slide along the first guide rail;

[0019] And / or, the surface printing device also includes a transferring mechanism, which is arranged on the machine base and connected to the printing mechanism for driving the printing mechanism to move, the transferring mechanism includes a third driving assembly and a fourth driving assembly, the third driving assembly includes a second guide rail, a sliding seat and a second power component, the second guide rail is arranged on the machine base, the sliding seat slides with the second guide rail, and the second power component is connected to the sliding seat for driving the sliding seat to slide along the second guide rail; the fourth driving assembly includes a third guide rail and a third power component, the third guide rail is arranged on the sliding seat, and the third guide rail and the second guide rail are arranged perpendicular to each other; the printing mechanism includes a bracket and a printing head, the printing head is arranged on the bracket, the bracket is slidably arranged on the third guide rail, and the third power component is connected to the bracket for driving the bracket and the printing head to slide along the third guide rail.

[0020] In some embodiments, the surface printing device further comprises an ink supply mechanism, the ink supply mechanism being mounted on the base and connected to the printing mechanism, the ink supply mechanism being used to supply ink to the printing mechanism;

[0021] The ink supply mechanism includes an ink storage assembly, an ink supply pump, a first ink cartridge, a delivery pump, a second ink cartridge, and an ink return assembly; the ink storage assembly includes an ink barrel, the ink barrel is used to store ink, and the ink supply pump is connected to the ink barrel and the first ink cartridge via a pipeline; the second ink cartridge includes an ink inlet chamber and an ink return chamber, the ink inlet chamber and the ink return chamber are separated, the delivery pump is connected to the ink inlet chamber and the first ink cartridge via a pipeline, and the ink inlet chamber is also connected to the first ink cartridge via a one-way delivery pipe; the ink return assembly is connected to the ink return chamber and the ink barrel via a pipeline, and the ink return assembly is used to return the ink in the ink return chamber to the ink barrel;

[0022] The printing mechanism includes a printing head, an ink channel and an ink outlet connected to the ink channel are formed in the printing head, the ink channel is connected to the ink inlet chamber and the ink return chamber, and the printing head prints ink to the first type of workpiece and / or the second type of workpiece through the ink outlet.

[0023] In some embodiments, the ink barrels are provided with at least two for storing inks of different colors;

[0024] There are at least two printing heads, and each ink barrel is connected to one printing head, so that the at least two printing heads print inks of different colors onto the first type of workpieces and / or the second type of workpieces through the ink outlet.

[0025] In some embodiments, the ink return component includes a negative pressure pump, a buffer ink cartridge and a circulation pump. The negative pressure pump is connected to the buffer ink cartridge, one port of the buffer ink cartridge is connected to the ink return chamber, and the other port is connected to the ink barrel through the circulation pump. The negative pressure pump is used to make the ink in the ink return chamber flow into the buffer ink cartridge, and the circulation pump is used to make the ink in the buffer ink cartridge flow into the ink barrel.

[0026] In some embodiments, the surface printing device further comprises:

[0027] a first curing mechanism, the first curing mechanism being connected to the printing mechanism, and being used for curing the first type of workpiece loaded on the jig and printed by the printing mechanism;

[0028] The second curing mechanism is arranged on the machine base, the printing mechanism and the second curing mechanism are arranged at intervals along the direction in which the first driving component drives the jig to move, and the second curing mechanism is used to cure the second type of workpiece loaded on the jig and printed by the printing mechanism.

[0029] In some embodiments, the machine base is provided with a receiving cavity for accommodating the ink supply mechanism, and the receiving cavity has an open cavity opening;

[0030] The surface printing device also includes a light-shielding structure, which includes at least two light-shielding plates. The at least two light-shielding plates are arranged at the cavity opening at an angle from top to bottom, and two adjacent light-shielding plates are arranged in parallel and spaced apart to block the first curing mechanism, the second curing mechanism and the ink supply mechanism.

[0031] The surface printing device provided in the present application includes a machine base, a conveying mechanism and a printing mechanism. The conveying mechanism includes a jig and a first drive component. The jig includes a base, a first loading mechanism and a second loading mechanism. The first loading mechanism and the second loading mechanism are installed on the base at intervals. The first loading mechanism is used to load a first type of workpiece whose surface to be printed is a flat surface, and the second loading mechanism is used to load a second type of workpiece whose surface to be printed is a curved surface. Therefore, the printing mechanism of the present application can print on both the first type of workpiece whose surface to be printed is a flat surface and the second type of workpiece whose surface to be printed is a curved surface. It is suitable for printing different types of workpieces and has a wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of an embodiment of a surface printing device of the present invention;

[0033] Figure 2 This is a schematic structural diagram of an embodiment of a fixture of the present invention;

[0034] Figure 3This is a structural diagram of an embodiment of a printing mechanism of the present invention;

[0035] Figure 4 It is a structural schematic diagram of an embodiment of the transfer mechanism of the present invention;

[0036] Figure 5 This is a schematic block diagram of an embodiment of the ink supply mechanism of the present invention.

[0037] Description of Figure Numbers:

[0038]

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0043] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The present invention provides a surface printing device, which is used for printing on the surface of products such as electronic cigarettes or mobile phone covers, so as to form various colors or patterns on the product surface, thereby improving the appearance and enhancing the diversity of the products.

[0045] Please refer to Figure 1 The surface printing device 100 of one embodiment of the present application includes a base 10, a conveying mechanism, and a printing mechanism 30. The conveying mechanism includes a fixture 21 and a first driving assembly. The fixture 21 includes a base 211, a first loading mechanism 212, and a second loading mechanism 213. The first loading mechanism 212 and the second loading mechanism 213 are installed on the base 211 at intervals. The first loading mechanism 212 is used to load a first type of workpiece with a flat surface to be printed, and the second loading mechanism 213 is used to load a second type of workpiece with a curved surface to be printed. The first driving assembly is installed on the base 10 and connected to the base 211 to drive the base 211 to drive the first loading mechanism 212, the second loading mechanism 213, and the first type of workpiece loaded on the first loading mechanism 212 or the second type of workpiece loaded on the first loading mechanism 212 to move.

[0046] The printing mechanism 30 is disposed on the machine base 10 , and is used for printing the first type of workpieces loaded on the first loading mechanism 212 , and for printing the second type of workpieces loaded on the second loading mechanism 213 .

[0047] In this embodiment, by arranging a first loading mechanism 212 and a second loading mechanism 213 on the base 211, the printing mechanism 30 can print on both the first type of workpieces whose printing surface is a flat surface and the second type of workpieces whose printing surface is a curved surface, thereby realizing that the first type of workpieces whose printing surface is a flat surface and the second type of workpieces whose printing surface is a curved surface can be printed on one device, which not only reduces the occupied volume and saves costs, but also is convenient to use, and also makes the surface printing device 100 of the present application suitable for printing different types of workpieces, and has a wide applicability.

[0048] It should be noted that the surface to be printed in the embodiment of the present application is a curved surface, which can be a workpiece with a regular cylindrical structure, or a workpiece with an irregular curved structure, such as an arc-shaped structure, etc. The embodiment of the present application does not limit this.

[0049] Please refer to Figure 2The first loading mechanism 212 includes a loading platform 2121 and a negative pressure component. The loading platform 2121 has an outer surface 2123 and an inner surface relative to each other, and a first suction hole 2122 that passes through the outer surface 2123 and the inner surface. The outer surface 2123 is used to load the first workpiece; the negative pressure component is connected to the first suction hole 2122, and the negative pressure component is used to form a negative pressure below the first suction hole 2122, so that the first type of workpiece loaded above the first suction hole 2122 is adsorbed on the outer surface 2123 under the action of the negative pressure.

[0050] In this embodiment, the negative pressure component can be an exhaust fan or a vacuum pump. The negative pressure component creates a negative pressure below the first suction hole 2122, so that the first type of workpiece loaded above the first suction hole 2122 is adsorbed on the outer surface 2123 under the action of the negative pressure, so that the first type of workpiece is better fitted to the loading platform 2121, preventing the first type of workpiece from moving, curling, or tilting during printing, thereby improving the printing accuracy of the first type of workpiece. At the same time, it can also prevent the first type of workpiece from rubbing against the printing mechanism 30 and causing physical damage.

[0051] In some embodiments, the first loading mechanism 212 also includes a turntable 2124 and a second drive assembly. The turntable 2124 is arranged on the loading platform 2121, and the turntable 2124 has a loading surface 2125 for carrying the first type of workpiece. The turntable 2124 is provided with a second suction hole 2126 connected to the first suction hole 2122. The negative pressure assembly is also used to form a negative pressure below the second suction hole 2126, so that the first type of workpiece loaded above the second suction hole 2126 is adsorbed on the loading surface 2125 under the action of negative pressure, preventing the first type of workpiece from moving, curling or warping during printing, so as to improve the printing accuracy of the first type of workpiece. At the same time, it can also prevent the first type of workpiece from rubbing against the printing mechanism 30 and causing physical damage; the second drive assembly is connected to the turntable 2124 to drive the turntable 2124 to drive the first type of workpiece to rotate.

[0052] In this embodiment, the turntable 2124 is driven by the second drive component to rotate the first type of workpiece, so that the printing of multiple circular patterns of different sizes can be achieved. For example, the closer the plane of the first type of workpiece is to the printing mechanism 30, the smaller the circle printed when it rotates, and the farther the plane of the first type of workpiece is from the printing mechanism 30, the larger the circle printed when it rotates, thereby forming multiple circular patterns of different sizes on the plane of the first type of workpiece to increase the diversity of the first type of workpiece.

[0053] Please continue to refer to Figure 2The second loading mechanism 213 includes a rod body 2131 and a rotation drive assembly 2132. The rod body 2131 is used to penetrate and connect the second type of workpiece; the rotation drive assembly 2132 is installed on the base 211 and is in transmission connection with the rod body 2131 to drive the rod body 2131 to rotate the second type of workpiece.

[0054] In this embodiment, the angle of the second type of workpiece toward the printing mechanism 30 is adjusted by the rotating drive assembly 2132, so that each curved surface of the second type of workpiece can be printed by the printing mechanism 30, while improving the uniformity of the printing of the second type of workpiece.

[0055] For example, the first drive component may be a cylinder, and the second drive component and the rotation drive component 2132 may be a powered device such as a rotating motor, etc., which is not limited in the embodiments of the present application.

[0056] In some embodiments, the first drive assembly includes a first guide rail 221 and a first power component. The first guide rail 221 is provided on the machine base 10, and the base 211 slides with the first guide rail 221. The first power component is installed on the machine base 10 and connected to the base 211 to drive the base 211 to slide along the first guide rail 221.

[0057] For example, the first power component may be a cylinder, which utilizes the telescopic motion of the cylinder output end to convert into the sliding of the base 211 relative to the first guide rail 221 , with smooth operation, simple structure, and easy implementation.

[0058] Of course, in other embodiments, the first power component may also be a powered device such as a motor, so as to drive the base 211 to slide relative to the first guide rail 221 .

[0059] Please refer to Figure 3 and Figure 4 The surface printing device 100 also includes a transfer mechanism 40, which is provided on the machine base 10 and connected to the printing mechanism 30 for driving the printing mechanism 30 to move. The transfer mechanism 40 includes a third drive assembly and a fourth drive assembly. The third drive assembly includes a second guide rail 41, a sliding seat 42 and a second power component. The second guide rail 41 is provided on the machine base 10, and the sliding seat 42 slides with the second guide rail 41. The second power component is connected to the sliding seat 42 to drive the sliding seat 42 to slide along the second guide rail 41; the fourth drive assembly includes a third guide rail 43 and a third power component. The third guide rail 43 is provided on the sliding seat 42, and the third guide rail 43 and the second guide rail 41 are arranged perpendicular to each other; the printing mechanism 30 includes a bracket 31 and a printing head 32. The printing head 32 is provided on the bracket 31, and the bracket 31 is slidably provided on the third guide rail 43. The third power component is connected to the bracket 31 to drive the bracket 31 and the printing head 32 to slide along the third guide rail 43.

[0060] The above arrangement enables the print head 32 to move along the Y and Z directions so that the ink ejected by the print head 32 falls to the set position, ensuring the accuracy and quality of printing and the repeatability of the continuous operation of the surface printing device 100.

[0061] For example, the second power component and the third power component may be cylinders, which utilize the telescopic motion of the cylinder output end to be converted into the motion of the print head 32 , which has a stable operation, a simple structure, and is easy to implement.

[0062] Of course, in other embodiments, the first power component may also be a powered device such as a motor, and the embodiment of the present application does not limit this.

[0063] Please refer to Figure 5 , the surface printing device 100 further includes an ink supply mechanism 50, the ink supply mechanism 50 is mounted on the base 211 and connected to the printing mechanism 30, the ink supply mechanism 50 is used to supply ink to the printing mechanism 30;

[0064] The ink supply mechanism 50 includes an ink storage assembly 51, an ink supply pump 52, a first ink cartridge 53, a delivery pump 54, a second ink cartridge 55, and an ink return assembly 56. The ink storage assembly 51 includes an ink barrel 511 for storing ink. The ink supply pump 52 connects the ink barrel 511 and the first ink cartridge 53 via a pipeline. The second ink cartridge 55 includes an ink inlet chamber 551 and an ink return chamber 552. The ink inlet chamber 551 and the ink return chamber 552 are separately arranged. The delivery pump 54 connects the ink inlet chamber 551 and the first ink cartridge 53 via a pipeline. The ink inlet chamber 551 is also connected to the first ink cartridge 53 via a one-way delivery pipe 553. The ink return assembly 56 connects the ink return chamber 552 and the ink barrel 511 via a pipeline. The ink return assembly 56 is used to return the ink in the ink return chamber 552 to the ink barrel 511.

[0065] The printing mechanism 30 includes a printing head 32, which has an ink channel and an ink outlet connected to the ink channel. The ink channel is connected to the ink inlet cavity 551 and the ink return cavity 552. The printing head 32 prints ink to the first type of workpiece and / or the second type of workpiece through the ink outlet.

[0066] In this embodiment, the ink supply mechanism 50 operates as follows: the ink barrel 511 in the ink storage assembly 51 is used to store ink. The ink supply pump 52 draws the ink stored in the ink barrel 511 into a pipeline and pushes it into the first ink cartridge 53. The delivery pump 54 draws ink from the first ink cartridge 53 and pushes it into the ink inlet chamber 551 of the second ink cartridge 55. The ink channel of the print head 32 communicates with the ink inlet chamber 551 and ink return chamber 552 of the second ink cartridge 55. Ink provided by the ink inlet chamber 551 enters the ink channel and is printed onto the first and / or second type of workpieces through the ink outlet. Simultaneously, the ink return assembly 56 continuously pushes ink from the ink return chamber 552 to the ink barrel 511, completing the cycle. Through the above-mentioned arrangement, when the print head 32 is not working, the ink continues to flow in the ink barrel 511, the first ink cartridge 53, the second ink cartridge 55, the print head 32 and the ink return assembly 56. When the print head 32 is working, the ink outlet is opened, and the print head 32 sprays part of the flowing ink through the ink outlet to the first type of workpiece and / or the second type of workpiece to print a pattern, and the remaining ink continues to flow. Regardless of whether the print head 32 is working or not, the ink in the ink supply mechanism 50 always keeps flowing.

[0067] Furthermore, the ink inlet chamber 551 in the second ink cartridge 55 is connected to the first ink cartridge 53 via a one-way delivery pipe 553. Ink flows in the one-way delivery pipe 553 from the second ink cartridge 55 to the first ink cartridge 53. This arrangement ensures that, when the ink inlet chamber 551 overflows with ink, the excess ink can flow through the one-way delivery pipe 553 to the first ink cartridge 53. This avoids damage to the second ink cartridge 55 due to the ink inlet chamber 551 overflowing with ink and the limited flow rate of ink through the ink channel of the print head 32, preventing the ink in the ink inlet chamber 551 from being promptly discharged.

[0068] The technical solution of the present invention comprises an ink reservoir assembly 51, an ink supply pump 52, a first ink cartridge 53, a delivery pump 54, a second ink cartridge 55, a print head 32, and an ink return assembly 56. The ink supply pump 52 delivers ink from the ink barrel 511 to the first ink cartridge 53, and the delivery pump 54 delivers ink from the first ink cartridge 53 to the second ink cartridge 55. The ink then flows through the ink inlet chamber 551 in the second ink cartridge 55 into the ink channel of the print head 32 and into the ink return chamber 552. The ink return assembly 56 then returns the ink from the ink return chamber 552 to the ink barrel 511. When the print head 32 is operating, it ejects some of the ink in the ink channel toward the ink outlet, printing a pattern on the product. The remaining ink continues to flow. When the print head 32 is not operating, the ink in the ink channel also continues to flow. In other words, in the ink supply mechanism 50, ink constantly circulates among the ink barrel 511, the first ink cartridge 53, the second ink cartridge 55, and the ink return assembly 56. The solution of the present invention solves the problem in the prior art that the ink does not circulate for a long time, resulting in ink precipitation, agglomeration, and poor flow, which leads to blockage of the ink outlet of the print head 32 and ultimately affects the life of the print head 32 and the printing effect.

[0069] In some embodiments, at least two ink tanks 511 are provided for storing inks of different colors; at least two print heads 32 are provided, each ink tank 511 being connected to a print head 32, so that at least two print heads 32 can print different colors of ink onto the first and / or second type of workpieces through the ink outlets. Multi-color printing of the first and / or second type of workpieces not only aesthetically pleasing but also allows for customization based on individual preferences, meeting the needs of diverse consumers.

[0070] In this embodiment, eight ink barrels 511 can be provided, storing eight different colors of ink, and eight corresponding print heads 32 can be provided, which can print eight colors on the first type of workpiece and / or the second type of workpiece to obtain printing effects of different colors and improve product diversity.

[0071] In some embodiments, the ink return component 56 proposed in the embodiments of the present invention includes a negative pressure pump 561, a buffer ink cartridge 562 and a circulation pump 563. The negative pressure pump 561 is connected to the buffer ink cartridge 562. One port of the buffer ink cartridge 562 is connected to the ink return chamber 552, and the other port is connected to the ink barrel 511 through the circulation pump 563. The negative pressure pump 561 is used to allow the ink in the ink return chamber 552 to flow into the buffer ink cartridge 562, and the circulation pump 563 is used to allow the ink in the buffer ink cartridge 562 to flow into the ink barrel 511.

[0072] In this embodiment, the ink return assembly 56 operates as follows: a negative pressure pump 561 is connected to a buffer ink cartridge 562. The negative pressure pump 561 supplies negative pressure gas to the buffer ink cartridge 562, generating negative pressure within the buffer ink cartridge 562, thereby causing ink within the ink return chamber 552 to flow into the buffer ink cartridge 562. This effectively draws ink from the ink return chamber 552 of the second ink cartridge 55 into the buffer ink cartridge 562 through negative pressure suction for buffer storage. One port of the buffer ink cartridge 562 is connected to the ink return chamber 552, while the other port is connected to the ink barrel 511 via a circulation pump 563, storing ink entering from the ink return chamber 552. Its function is to buffer and regulate the ink, preventing the circulation pump 563 from directly acting on the ink return chamber 552. If it directly acts on the ink return chamber 552, causing the ink in the ink return chamber 552 to flow back to the ink barrel 511, the output power of the circulation pump 563 will be relatively large, which can easily lead to an increase in the ink flow rate in the ink channel passing through the print head 32, affecting the printing stability of the print head 32. This ensures the stable operation of the ink return system. The circulation pump 563 works by pushing the ink buffered in the buffer cartridge 562 into the ink barrel 511, completing the ink backflow. Its function is to complete the circulation and reuse of the ink from the print head 32 back to the ink barrel 511.

[0073] In this embodiment, through the cooperation of the negative pressure pump 561, the buffer ink cartridge 562 and the circulation pump 563, the ink of the print head 32 can be recovered and reused stably and efficiently, ensuring the continuous and reliable operation of the circulating ink system.

[0074] In some embodiments, the delivery pump 54 can be a gear pump, a screw pump, or a plunger pump. These pumps have a wide flow range, high operating pressure, and can provide stable ink delivery. The circulation pump 563 can be a self-priming pump or a turbine pump. Both pumps have a self-priming filling function, which can smoothly draw ink from the buffer ink cartridge 562. Self-priming pumps are small in size, while turbine pumps have a high flow rate. Diaphragm pumps or peristaltic pumps can also be used. The actual pump selected will be determined by those skilled in the art based on their actual design needs, as long as it can achieve ink delivery and return.

[0075] In some embodiments, the surface printing device 100 further includes a first curing mechanism and a second curing mechanism, wherein the first curing mechanism is connected to the printing mechanism 30 and is used to cure the first type of workpiece loaded on the jig 21 and printed by the printing mechanism 30;

[0076] The second curing mechanism is provided on the machine base 10 , and the printing mechanism 30 and the second curing mechanism are spaced apart along the direction in which the first driving assembly drives the jig 21 to move. The second curing mechanism is used to cure the second type of workpiece loaded on the jig 21 and printed by the printing mechanism 30 .

[0077] In this embodiment, the first curing mechanism and the second curing mechanism can use UV lamps. Compared with traditional mercury lamps, the high-intensity ultraviolet light can cure the ink on the first and second types of workpieces faster and more evenly, greatly improving production efficiency.

[0078] In some embodiments, the surface printing device 100 further includes a controller 80. In this embodiment, the controller 80 can be a programmable controller (PLC) in combination with multiple photoelectric sensors to control different components to operate normally according to a set action sequence, thereby achieving automated control of the entire processing process, ensuring efficient operation of each link, avoiding mutual interference between different components, and ensuring the stability and safety of the device.

[0079] In some embodiments, the base 10 is provided with a accommodating cavity for accommodating the ink supply mechanism 50, and the accommodating cavity has an open cavity mouth; the surface printing device 100 also includes a light-shielding structure 70, and the light-shielding structure 70 includes at least two light-shielding plates 71, and at least two light-shielding plates 71 are arranged at the cavity mouth at an angle from top to bottom, and two adjacent light-shielding plates 71 are arranged in parallel and spaced apart to block the first curing mechanism, the second curing mechanism and the ink supply mechanism 50, so as to prevent the first curing mechanism and the second curing mechanism from curing the ink in the ink supply mechanism 50, thereby maintaining the chemical stability of the ink and ensuring the normal supply of ink to the print head 32.

[0080] The above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications based on the above description are possible. It is not possible to enumerate all embodiments here. Any obvious variations or modifications arising from the technical solutions of the present invention remain within the scope of protection of the present invention.

Claims

1. A surface printing device, characterized in that: include: base; A conveying mechanism, the conveying mechanism includes a fixture and a first driving assembly, the fixture includes a base, a first loading mechanism and a second loading mechanism, the first loading mechanism and the second loading mechanism are installed on the base at intervals, the first loading mechanism is used to load a first type of workpiece with a flat surface to be printed, and the second loading mechanism is used to load a second type of workpiece with a curved surface to be printed, the first driving assembly is installed on the machine base and connected to the base to drive the base to drive the first loading mechanism, the second loading mechanism and the first type of workpiece loaded on the first loading mechanism or the second type of workpiece loaded on the first loading mechanism to move; a printing mechanism, the printing mechanism being disposed on the machine base, the printing mechanism being used to print the first type of workpieces loaded on the first loading mechanism, and being used to print the second type of workpieces loaded on the second loading mechanism; a second curing mechanism, the second curing mechanism being disposed on the machine base, the printing mechanism and the second curing mechanism being spaced apart along the direction in which the jig is driven by the first driving assembly to move, the second curing mechanism being used to cure the second type of workpiece loaded on the jig and printed by the printing mechanism; Wherein, the first loading mechanism includes: a loading platform, the loading platform having an outer surface and an inner surface facing each other, and a first suction hole penetrating the outer surface and the inner surface, the outer surface being used for loading the first type of workpiece; a negative pressure assembly, the negative pressure assembly being in communication with the first suction hole, the negative pressure assembly being configured to generate a negative pressure below the first suction hole, so that a first type of workpiece loaded above the first suction hole is adsorbed on the outer surface under the action of the negative pressure; a turntable, the turntable being disposed on the loading platform and having a loading surface for carrying the first type of workpiece, the turntable being provided with a second suction hole communicating with the first suction hole, the negative pressure component being further configured to create a negative pressure below the second suction hole so that the first type of workpiece loaded above the second suction hole is adsorbed on the loading surface under the action of the negative pressure; a second drive assembly connected to the turntable to drive the turntable to rotate the first type of workpiece; The second loading mechanism comprises: a rod body, the rod body being used to penetrate and connect the second type of workpiece; A rotation drive assembly is installed on the base and is in transmission connection with the rod body, so as to drive the rod body to drive the second type of workpiece to rotate.

2. The surface printing device according to claim 1, characterized in that: The first driving assembly includes a first guide rail and a first power component, the first guide rail is provided on the machine base, the base is slidably engaged with the first guide rail, and the first power component is installed on the machine base and connected to the base to drive the base to slide along the first guide rail; And / or, the surface printing device also includes a transferring mechanism, which is arranged on the machine base and connected to the printing mechanism for driving the printing mechanism to move, the transferring mechanism includes a third driving assembly and a fourth driving assembly, the third driving assembly includes a second guide rail, a sliding seat and a second power component, the second guide rail is arranged on the machine base, the sliding seat slides with the second guide rail, and the second power component is connected to the sliding seat for driving the sliding seat to slide along the second guide rail; the fourth driving assembly includes a third guide rail and a third power component, the third guide rail is arranged on the sliding seat, and the third guide rail and the second guide rail are arranged perpendicular to each other; the printing mechanism includes a bracket and a printing head, the printing head is arranged on the bracket, the bracket is slidably arranged on the third guide rail, and the third power component is connected to the bracket for driving the bracket and the printing head to slide along the third guide rail.

3. The surface printing device according to claim 1, characterized in that: The surface printing device further comprises an ink supply mechanism, which is mounted on the base and connected to the printing mechanism, and is used to supply ink to the printing mechanism; The ink supply mechanism includes an ink storage assembly, an ink supply pump, a first ink cartridge, a delivery pump, a second ink cartridge, and an ink return assembly; the ink storage assembly includes an ink barrel, the ink barrel is used to store ink, and the ink supply pump is connected to the ink barrel and the first ink cartridge via a pipeline; the second ink cartridge includes an ink inlet chamber and an ink return chamber, the ink inlet chamber and the ink return chamber are separated, the delivery pump is connected to the ink inlet chamber and the first ink cartridge via a pipeline, and the ink inlet chamber is also connected to the first ink cartridge via a one-way delivery pipe; the ink return assembly is connected to the ink return chamber and the ink barrel via a pipeline, and the ink return assembly is used to return the ink in the ink return chamber to the ink barrel; The printing mechanism includes a printing head, an ink channel and an ink outlet connected to the ink channel are formed in the printing head, the ink channel is connected to the ink inlet chamber and the ink return chamber, and the printing head prints ink to the first type of workpiece and / or the second type of workpiece through the ink outlet.

4. The surface printing device according to claim 3, characterized in that: The ink barrels are provided with at least two for storing inks of different colors; There are at least two printing heads, and each ink barrel is connected to one printing head, so that the at least two printing heads print inks of different colors onto the first type of workpieces and / or the second type of workpieces through the ink outlet.

5. The surface printing device according to claim 3, characterized in that: The ink return component includes a negative pressure pump, a buffer ink cartridge and a circulation pump. The negative pressure pump is connected to the buffer ink cartridge. One port of the buffer ink cartridge is connected to the ink return cavity, and the other port is connected to the ink barrel through the circulation pump. The negative pressure pump is used to make the ink in the ink return cavity flow into the buffer ink cartridge, and the circulation pump is used to make the ink in the buffer ink cartridge flow into the ink barrel.

6. The surface printing device according to claim 3, characterized in that: The surface printing device also includes The first curing mechanism is connected to the printing mechanism, and is used for curing the first type of workpiece loaded on the jig and printed by the printing mechanism.

7. The surface printing device according to claim 6, characterized in that: The machine base is provided with a receiving cavity for accommodating the ink supply mechanism, and the receiving cavity has an open cavity opening; The surface printing device also includes a light-shielding structure, which includes at least two light-shielding plates. The at least two light-shielding plates are arranged at the cavity opening at an angle from top to bottom, and two adjacent light-shielding plates are arranged in parallel and spaced apart to block the first curing mechanism, the second curing mechanism and the ink supply mechanism.

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