Inkjet device and 3D printing equipment

Abstract

The invention discloses an inkjet device and a 3D printing device, and relates to the field of 3D printing technology. The device comprises a controller, a negative pressure box assembly, an ink storage box, a bottom plate, and a plurality of nozzle assemblies uniformly distributed on the bottom plate, each nozzle assembly is connected to an ink supply box assembly, the nozzle assembly comprises a nozzle, an ink inlet, and an ink return port that are connected to each other, the ink supply box assembly comprises an ink supply cavity and an ink return cavity, the ink inlet is connected to the ink supply cavity, the ink return port is connected to the ink return cavity, the negative pressure box assembly comprises a first cavity and a second cavity, the first cavity and the second cavity are respectively connected to a negative pressure source, so that the air pressure in the first cavity is greater than the air pressure in the second cavity, the first cavity is connected to the ink supply cavity, the second cavity is connected to the ink return cavity, the ink supply cavity and the ink return cavity are respectively connected to the ink storage box, so as to form an ink circulation path of the ink storage box, the ink supply cavity, the ink inlet, the ink return port, and the ink return cavity. The uniformity and consistency of ink supply can be improved, the inkjet quality can be improved, and the printing effect can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to an inkjet device and a 3D printing device. Background Art

[0002] Digital informationization and intelligence in sand casting process are important directions for the development of sand casting technology. At present, moldless sand 3D printing technology has become a research hotspot in moldless sand manufacturing technology. Moldless sand 3D printers are suitable for product design and development applications, personalized customization, and multi-variety medium and small batch production, which can significantly shorten the product development cycle and reduce product mold development costs.

[0003] The inkjet device currently used in sand mold 3D printing equipment may experience frame loss or ink dripping during long-term use, affecting the actual printing effect. This phenomenon is particularly obvious for array-arranged nozzles. Summary of the invention

[0004] The object of the present invention is to provide an inkjet device and a 3D printing device, which can improve the uniformity and consistency of ink supply, improve the inkjet quality, and thus improve the printing effect.

[0005] The embodiment of the present invention is achieved as follows:

[0006] According to one aspect of an embodiment of the present invention, there is provided an inkjet device, comprising a controller, a negative pressure box assembly, an ink storage cartridge, a bottom plate, and a plurality of nozzle assemblies uniformly distributed on the bottom plate, each of the nozzle head assemblies being connected to an ink supply cartridge assembly, the nozzle head assembly comprising a nozzle, an ink inlet, and an ink return port being connected to each other, the ink supply cartridge assembly comprising an ink supply chamber and an ink return chamber, the ink inlet being connected to the ink supply chamber, the ink return port being connected to the ink return chamber, the negative pressure box assembly comprising a first cavity and a second cavity, the first cavity and the second cavity being connected to a negative pressure source respectively, the controller being electrically connected to the negative pressure source so that the air pressure in the first cavity is greater than the air pressure in the second cavity, the first cavity being connected to the ink supply chamber, the second cavity being connected to the ink return chamber, the ink supply chamber and the ink return chamber being connected to the ink storage cartridge respectively to form an ink circulation path for the ink storage cartridge, the ink supply chamber, the ink inlet, the ink return port, and the ink return chamber.

[0007] Optionally, the negative pressure box assembly also includes a first pressure sensor arranged on the first cavity, and a second pressure sensor arranged on the second cavity, the first pressure sensor and the second pressure sensor are electrically connected to the controller respectively, and the controller controls the negative pressure source to adjust the pressure in the first cavity and the second cavity according to the detection values ​​obtained by the first pressure sensor and the second pressure sensor.

[0008] Optionally, the ink storage cartridge is arranged above the ink supply cartridge assembly, and an air hole is arranged on the top of the ink storage cartridge, a first ink outlet and a second ink outlet are also arranged on the ink storage cartridge, a first access port and a second access port are respectively arranged on both sides of the ink supply cavity, the first ink outlet is connected to the first access port, and the second ink outlet is connected to the second access port.

[0009] Optionally, the inkjet device also includes a driving board, on which a first solenoid valve and a second solenoid valve electrically connected to the controller are provided respectively, the first ink outlet is connected to the first access port via the first solenoid valve, and the second ink outlet is connected to the second access port via the second solenoid valve, and a liquid level sensor electrically connected to the controller is also provided in the ink supply chamber, and the controller controls the first solenoid valve and the second solenoid valve to open or close according to detection data obtained by the liquid level sensor.

[0010] Optionally, the ink storage box is further provided with a third ink outlet, the ink supply cavity is further provided with a third access port, and the third ink outlet is communicated with the third access port.

[0011] Optionally, the ink supply chamber includes a plurality of sub-ink supply chambers, the ink return chamber includes a plurality of sub-ink return chambers, each sub-ink supply chamber is correspondingly connected to a plurality of the ink inlets, and each sub-ink return chamber is correspondingly connected to a plurality of the ink return ports.

[0012] Optionally, a plurality of partitions are respectively provided in the sub-ink supply chamber and the sub-ink return chamber, and the plurality of sub-ink supply chambers are interconnected through connecting holes.

[0013] Optionally, the inkjet device further comprises a peristaltic pump, and the ink return chamber is connected to the ink storage cartridge via the peristaltic pump, so that the ink in the ink return chamber is pumped back into the ink storage cartridge.

[0014] Optionally, the inkjet device further comprises an end plate, two of the end plates are correspondingly arranged and connected and fixed by a pull rod, so that the end plate is fixedly connected to the plurality of nozzle assemblies.

[0015] Another aspect of an embodiment of the present invention provides a 3D printing device, comprising a frame, a slide rail module arranged on the frame, and an inkjet device as described in any one of the above items, wherein the slide rail module is transmission-connected to the inkjet device via a connecting slider.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The inkjet device and 3D printing equipment provided by the embodiment of the present invention can stably spray ink through the nozzle assembly connected to the ink supply cartridge assembly. Through the first cavity connected to the ink supply cavity, the second cavity connected to the ink return cavity, and the difference in pressure between the first cavity and the second cavity, the ink is sent from the ink supply cavity through the nozzle assembly to the ink return cavity or the ink is ejected from the ink supply cavity through the nozzle assembly for inkjet printing, and there is no ink dripping during the printing process, thereby improving the stability during printing. In addition, through the ink supply cavity and the ink return cavity respectively connected to the ink storage cartridge, the ink from the ink supply cavity to the ink return cavity is returned to the ink storage cartridge to realize the circulating ink supply, and the probability of the ink being precipitated due to long-term placement, thereby clogging the nozzle assembly, causing the printing frame to be lost, and the local non-inking phenomenon. Through the organic combination of the first cavity and the second cavity with negative pressure, and the ink supply cavity, the ink return cavity and the ink storage cartridge, the uniformity and consistency of the ink supply are improved, the inkjet quality is improved, and the printing effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 One of the structural schematic diagrams of the inkjet device provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of a nozzle assembly provided by an embodiment of the present invention;

[0021] Figure 3 One of the structural schematic diagrams of the ink supply cartridge assembly provided by an embodiment of the present invention;

[0022] Figure 4 A second structural schematic diagram of an ink supply cartridge assembly provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of a negative pressure box assembly provided by an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of the structure of an ink storage cartridge provided by an embodiment of the present invention;

[0025] Figure 7 The second structural schematic diagram of the inkjet device provided in the embodiment of the present invention.

[0026] Icons: 100- inkjet device; 103- bottom plate; 105- end plate; 107- tie rod; 110- negative pressure box assembly; 112- first cavity; 114- second cavity; 116- first pressure sensor; 118- second pressure sensor; 120- ink storage box; 122- air hole; 124- first ink outlet; 126- second ink outlet; 128- third ink outlet; 129- connection port; 130 -nozzle assembly; 132-nozzle; 134-ink inlet; 136-ink return port; 140-ink supply cartridge assembly; 142-ink supply chamber; 1422-first access port; 1424-second access port; 1426-sub-ink supply chamber; 144-ink return chamber; 1442-sub-ink return chamber; 146-partition; 148-connecting hole; 150-drive plate; 152-first solenoid valve; 154-second solenoid valve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Please refer to Figure 1 This embodiment provides an inkjet device 100, including a controller ( Figure 1 ), negative pressure box assembly 110, ink storage box 120, bottom plate 103 and multiple nozzle assemblies 130 evenly distributed on bottom plate 103, each nozzle assembly 130 is connected to ink supply cartridge assembly 140. Figure 2 The nozzle assembly 130 includes a nozzle 132, an ink inlet 134 and an ink return port 136 which are interconnected. Figure 3 As shown, the ink supply cartridge assembly 140 includes an ink supply chamber 142 and an ink return chamber 144, the ink inlet 134 is connected to the ink supply chamber 142, and the ink return port 136 is connected to the ink return chamber 144. Figure 5 The negative pressure box assembly 110 includes a first cavity 112 and a second cavity 114, and the first cavity 112 and the second cavity 114 are respectively connected to the negative pressure source ( Figure 5 The controller is electrically connected to the negative pressure source so that the air pressure in the first cavity 112 is greater than the air pressure in the second cavity 114. The first cavity 112 is connected to the ink supply cavity 142, and the second cavity 114 is connected to the ink return cavity 144. The ink supply cavity 142 and the ink return cavity 144 are respectively connected to the ink storage cartridge 120 to form an ink circulation path of the ink storage cartridge 120, the ink supply cavity 142, the ink inlet 134, the ink return port 136, and the ink return cavity 144.

[0034] It should be noted that, first, in the normal state, the inkjet device 100 is provided with the required ink by the ink storage cartridge 120, flows through the ink supply cavity 142 in the ink supply cartridge assembly 140, and the ink in the ink supply cavity 142 is then used for inkjet printing through the nozzle 132 in the nozzle assembly 130. When the amount of ink in the nozzle assembly 130 is greater than the amount required for printing, the first cavity 112 and the second cavity 114 are used to suck the excess ink back into the ink return cavity 144, thereby reducing the probability of ink dripping during printing. In addition, through the passage formed by the ink storage cartridge 120, the ink supply cavity 142, the nozzle assembly 130 and the ink return cavity 144, and then through the passage formed between the ink return cavity 144 and the ink storage cartridge 120, the ink forms a flow cycle, thereby reducing the probability that the ink will precipitate and crystallize due to standing, or even block the nozzle 132, causing local ink failure, and ultimately affecting the printing quality.

[0035] Second, the first cavity 112 and the second cavity 114 provide the required negative pressure for the ink supply environment. The first cavity 112 is connected to the ink supply cavity 142, so that the ink pressure in the ink supply cavity 142 is stable during printing, reducing the fluctuation during ink supply, thereby reducing the probability of frame loss, ink spraying or local non-ink spraying during printing. The second cavity 114 is connected to the ink return cavity 144, so that the excess ink is sucked back into the ink return cavity 144, reducing the probability of ink dripping from the nozzle 132 during printing. Among them, the negative pressure source that provides negative pressure for the first cavity 112 and the second cavity 114 can be a device that can generate negative pressure, such as a vacuum pump, and the specific model size can be flexibly set according to actual needs.

[0036] The inkjet device 100 provided in the embodiment of the present invention can stably spray ink through the nozzle assembly 130 connected to the ink supply cartridge assembly 140. Through the first cavity 112 connected to the ink supply cavity 142, the second cavity 114 connected to the ink return cavity 144, and the difference in pressure between the first cavity 112 and the second cavity 114, the ink is sent from the ink supply cavity 142 to the ink return cavity 144 through the nozzle assembly 130 or the ink is sprayed from the ink supply cavity 142 to the nozzle assembly 130 for inkjet printing, and there is no ink dripping during the printing process, thereby improving the stability of printing. In addition, through the ink supply cavity 142 and the ink return cavity 144 respectively connected to the ink storage cartridge 120, the ink from the ink supply cavity 142 to the ink return cavity 144 is returned to the ink storage cartridge 120, so as to realize the circulating ink supply, and reduce the probability of precipitation due to long-term placement of ink, thereby blocking the nozzle assembly 130, causing the phenomenon of printing frame loss, local non-inking, etc. By organically combining the first cavity 112 and the second cavity 114 with negative pressure, as well as the ink supply cavity 142, the ink return cavity 144 and the ink storage box 120, the uniformity and consistency of ink supply are improved, the inkjet quality is improved, and thus the printing effect is improved.

[0037] like Figure 5As shown, the negative pressure box assembly 110 also includes a first pressure sensor 116 disposed on the first cavity 112, and a second pressure sensor 118 disposed on the second cavity 114. The first pressure sensor 116 and the second pressure sensor 118 are electrically connected to the controller respectively, and the controller controls the negative pressure source to adjust the pressure in the first cavity 112 and the second cavity 114 according to the detection values ​​obtained by the first pressure sensor 116 and the second pressure sensor 118. In this way, the stability of the negative pressure box assembly 110 during the entire printing process can be ensured, thereby promoting the stability of the ink supply cartridge assembly 140, and improving the printing quality and printing stability.

[0038] like Figure 1 and Figure 6 As shown, the ink storage box 120 is arranged above the ink supply box assembly 140, and the top of the ink storage box 120 is provided with an air hole 122, and the ink storage box 120 is also provided with a first ink outlet 124 and a second ink outlet 126. Figure 3 and Figure 4 As shown, a first inlet 1422 and a second inlet 1424 are respectively disposed on both sides of the ink supply cavity 142, the first ink outlet 124 is connected to the first inlet 1422, and the second ink outlet 126 is connected to the second inlet 1424 to form two parallel passages.

[0039] Specifically, the air pressure above the liquid level in the ink storage cartridge 120 is balanced with the atmospheric pressure by the air hole 122 disposed on the top of the ink storage cartridge 120. When the ink storage cartridge 120 supplies ink to the ink supply chamber 142, the ink can be supplied by gravity due to the weight of the ink and the negative pressure in the ink supply chamber 142 can be used to absorb the ink by negative pressure. The passage between the first ink outlet 124 and the first inlet 1422 and the passage between the second ink outlet 126 and the second inlet 1424 are used to form two parallel pipelines, which are disposed on both sides of the ink supply chamber 142, which is conducive to sufficient and stable ink supply, so that the ink is more evenly distributed in the ink supply chamber 142, and the fluctuation during ink supply is reduced, which is conducive to stable ink supply.

[0040] like Figure 1 , Figure 4 and Figure 6 As shown, the inkjet device 100 further includes a driving board 150, on which a first solenoid valve 152 and a second solenoid valve 154 are respectively electrically connected to the controller. The first ink outlet 124 is connected to the first access port 1422 through the first solenoid valve 152, and the second ink outlet 126 is connected to the second access port 1424 through the second solenoid valve 154. A liquid level sensor ( Figure 4 The controller controls the first solenoid valve 152 and the second solenoid valve 154 to open or close according to the detection data obtained by the liquid level sensor.

[0041] Specifically, the liquid level sensor detects a preset interval value, which has a high preset value and a low preset value. When the value detected by the liquid level sensor reaches the low preset value, the controller controls the first solenoid valve 152 and the second solenoid valve 154 to open, and the ink storage cartridge 120 replenishes the required ink to the ink supply chamber 142. Similarly, when the value detected by the liquid level sensor reaches the high preset value, the controller controls the first solenoid valve 152 and the second solenoid valve 154 to close, and the passage between the first ink outlet 124 and the first inlet 1422 is blocked, and the passage between the second ink outlet 126 and the second inlet 1424 is also blocked, thereby avoiding problems such as excessive ink supply causing reduced printing quality.

[0042] Alternatively, if Figure 6 As shown, the ink storage box 120 is also provided with a third ink outlet 128. Figure 3 As shown, the ink supply chamber 142 is also provided with a third access port ( Figure 3 (not shown in the figure), the third ink outlet 128 is connected to the third access port. In this way, when the ink storage cartridge 120 supplies ink to the ink supply cavity 142, the ink can be supplied by gravity through the third ink outlet 128 and the negative pressure in the ink supply cavity 142 can be used to absorb the ink by negative pressure. The liquid level of the ink in the ink supply cavity 142 tends to be stable, the frequent opening or closing of the first electromagnetic valve 152 and the second electromagnetic valve 154 is reduced, and the stability of the ink supply is improved, which is conducive to improving the printing quality.

[0043] like Figure 3 As shown, the ink supply chamber 142 includes a plurality of sub-ink supply chambers 1426, and the ink return chamber 144 includes a plurality of sub-ink return chambers 1442. Figure 2 Each sub-ink supply cavity 1426 is connected to a plurality of ink inlets 134 , and each sub-ink return cavity 1442 is connected to a plurality of ink return ports 136 .

[0044] Specifically, the number of the sub-ink return chamber 1442 and the sub-ink supply chamber 1426 can be flexibly set according to the number of the nozzle assemblies 130 provided, and the embodiment of the present invention does not impose any specific restrictions on this. In addition, the sub-ink return chamber 1442 and the sub-ink supply chamber 1426 can be arranged at intervals, nested, or concentrated in a region, as long as they are conveniently connected to the ink inlet 134 and the ink return port 136 of the corresponding nozzle assembly 130.

[0045] like Figure 3As shown, the embodiment of the present invention is described by taking 12 nozzle assemblies 130 as an example, and the ink supply cartridge assembly 140 is generally divided into 3 sub-ink supply chambers 1426 and 4 sub-ink return chambers 1442. Among them, 2 sub-ink return chambers 1442 are located on one side of the ink supply chamber 142, and the other 2 sub-ink return chambers 1442 are located on the other side of the ink supply chamber 142. The ink supply chamber 142 composed of 3 sub-ink supply chambers 1426, that is, the sub-ink return chambers 1442 are arranged on both sides of the sub-ink supply chamber 1426. An independent sub-ink return chamber 1442 corresponds to the ink return pipelines of 3 nozzle assemblies 130, and an independent sub-ink supply chamber 1426 corresponds to the ink inlet pipelines of 4 nozzle assemblies 130, so that each nozzle assembly 130 forms a required passage through the ink inlet port 134 and the ink return port 136 respectively.

[0046] like Figure 3 and Figure 4 As described above, a plurality of partitions 146 are respectively disposed in the sub-ink supply chamber 1426 and the sub-ink return chamber 1442 , and the plurality of sub-ink supply chambers 1426 are interconnected via connecting holes 148 .

[0047] Specifically, the partition 146 can be integrally formed with the sub-ink supply chamber 1426 and the sub-ink return chamber 1442, or can be separately detachably connected, and the embodiment of the present invention does not impose any specific restrictions on this. By setting a plurality of partitions 146 in the sub-ink supply chamber 1426 and the sub-ink return chamber 1442, the ink in the ink supply chamber 142 can be prevented from shaking during the operation of the inkjet device 100, thereby ensuring a uniform and stable ink supply flow rate.

[0048] In addition, the connecting hole 148 makes the sub-ink supply chambers 1426 communicate with each other, and the ink level line is higher than the connecting hole 148, so that the lower ink parts of the sub-ink supply chambers 1426 can be connected with each other, and the upper negative pressure parts are independent of each other. This design can achieve effective ink supply, and the negative pressure environment of the upper part of each sub-ink supply chamber 1426 is more balanced, which is conducive to uniform and consistent inkjet.

[0049] Optionally, the inkjet device 100 further includes a peristaltic pump, and the ink return chamber 144 is connected to the ink storage cartridge 120 via the peristaltic pump, so that the ink in the ink return chamber 144 is pumped back into the ink storage cartridge 120 .

[0050] Specifically, the inlet end of the peristaltic pump is connected to the ink return chamber 144 , and the outlet end is connected to the connection port 129 on the ink storage cartridge 120 . In this way, the ink in the ink return chamber 144 can flow to the ink storage cartridge 120 more stably and reliably.

[0051] like Figure 7As shown, the inkjet device 100 further includes an end plate 105, two end plates 105 are correspondingly arranged and connected and fixed by a tie rod 107, so that the end plate 105 is fixedly connected to the plurality of nozzle assemblies 130. In this way, the overall rigidity of the nozzle assembly 130 can be improved, which is conducive to stable inkjet printing of the nozzle assembly 130.

[0052] The embodiment of the present invention further discloses a 3D printing device, comprising a frame, a slide rail module arranged on the frame, and an inkjet device 100 as described above, wherein the slide rail module is connected to the inkjet device 100 by a connecting slider. The 3D printing device includes the same structure and beneficial effects as the inkjet device 100 in the aforementioned embodiment. The structure and beneficial effects of the inkjet device 100 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inkjet device, characterized in that: The invention comprises a controller, a negative pressure box assembly, an ink storage box, a bottom plate and a plurality of nozzle assemblies uniformly distributed on the bottom plate, each of the nozzle assemblies is communicated with an ink supply cartridge assembly, the nozzle assembly comprises a nozzle, an ink inlet and an ink return port which are communicated with each other, the ink supply cartridge assembly comprises an ink supply cavity and an ink return cavity, the ink inlet is communicated with the ink supply cavity, the ink return port is communicated with the ink return cavity, the negative pressure box assembly comprises a first cavity and a second cavity, the first cavity and the second cavity are respectively communicated with a negative pressure source, the controller is electrically connected to the negative pressure source so that the air pressure in the first cavity is greater than the air pressure in the second cavity, the first cavity is communicated with the ink supply cavity, the second cavity is communicated with the ink return cavity, the ink supply cavity and the ink return cavity are respectively communicated with the ink storage cartridge to form an ink circulation path of the ink storage cartridge, the ink supply cavity, the ink inlet, the ink return port and the ink return cavity; The ink storage box is arranged above the ink supply box assembly, and an air hole is arranged on the top of the ink storage box, and a first ink outlet and a second ink outlet are also arranged on the ink storage box, and a first access port and a second access port are respectively arranged on both sides of the ink supply chamber, the first ink outlet is connected to the first access port, and the second ink outlet is connected to the second access port; The inkjet device further comprises a driving board, on which a first solenoid valve and a second solenoid valve electrically connected to the controller are disposed, the first ink outlet is communicated with the first access port via the first solenoid valve, and the second ink outlet is communicated with the second access port via the second solenoid valve, a liquid level sensor electrically connected to the controller is further disposed in the ink supply cavity, and the controller controls the first solenoid valve and the second solenoid valve to be opened or closed according to detection data obtained by the liquid level sensor; The ink storage box is also provided with a third ink outlet, and the ink supply cavity is also provided with a third access port, and the third ink outlet is communicated with the third access port.

2. The inkjet device according to claim 1, characterized in that: The negative pressure box assembly also includes a first pressure sensor arranged on the first cavity, and a second pressure sensor arranged on the second cavity. The first pressure sensor and the second pressure sensor are electrically connected to the controller respectively. The controller controls the negative pressure source to adjust the pressure in the first cavity and the second cavity according to the detection values ​​obtained by the first pressure sensor and the second pressure sensor.

3. The inkjet device according to claim 1, characterized in that: The ink supply chamber includes a plurality of sub-ink supply chambers, and the ink return chamber includes a plurality of sub-ink return chambers. Each sub-ink supply chamber is connected to a plurality of ink inlets, and each sub-ink return chamber is connected to a plurality of ink return ports.

4. The inkjet device according to claim 3, characterized in that: A plurality of partitions are respectively arranged in the sub-ink supply chamber and the sub-ink return chamber, and the plurality of sub-ink supply chambers are interconnected through connecting holes.

5. The inkjet device according to claim 1, characterized in that: The inkjet device further comprises a peristaltic pump, and the ink return chamber is connected with the ink storage box through the peristaltic pump so that the ink in the ink return chamber is pumped back into the ink storage box.

6. The inkjet device according to claim 1, characterized in that: The inkjet device further comprises an end plate, two of which are arranged correspondingly and connected and fixed by a pull rod, so that the end plate is fixedly connected to the plurality of nozzle assemblies.

7. A 3D printing device, characterized in that: It comprises a frame, a slide rail module arranged on the frame, and the inkjet device according to any one of claims 1 to 6, wherein the slide rail module is transmission-connected to the inkjet device via a connecting slider.

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