A printhead device and 3D printing apparatus

Abstract

The application relates to a printing head device, which comprises a printing head frame, an ink jet mechanism and a wetting mechanism, the ink jet mechanism and the wetting mechanism are arranged on the printing head frame, a mounting hole and a wetting hole are arranged on the bottom of the printing head frame and are spaced apart from each other and face a printing surface, the ink jet mechanism comprises a nozzle assembly, the nozzle assembly is arranged in the mounting hole, the wetting mechanism comprises a water storage cavity, a humidifying piece and a wetting channel, the water storage cavity, the humidifying piece and the wetting channel are sequentially connected in communication, the wetting channel is arranged on the bottom of the printing head frame and is connected in communication with the wetting hole. The application also relates to a 3D printing equipment. The scheme can solve the problem that the existing printer nozzle is prone to drying and causes poor printing quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing equipment, in particular to a printing head device and a 3D printing equipment. BACKGROUND

[0002] In the binder jetting 3D printing, the printer realizes the bonding forming of the powder material by controlling the binder to be sprayed by the nozzle. The nozzle is the execution element of the inkjet action, therefore, keeping the nozzle plate wet is one of the important conditions to ensure the stability of the inkjet, and is also an important factor to ensure the printing quality.

[0003] However, in some printing applications of water-based binder, due to the evaporation of water in the ink, the nozzle plate is prone to dry, which makes the inkjet state worse and affects the printing quality. On the other hand, during the operation of the printer, a small amount of binder residue will inevitably exist around the nozzle plate and the nozzle hole. The binder residue exposed to the air will gradually solidify and crystallize, causing the nozzle hole to be blocked and frame to be lost, thereby affecting the printing effect. SUMMARY

[0004] Therefore, it is necessary to provide a printing head device and a 3D printing equipment to solve the problem that the existing printer nozzle is prone to dry, resulting in poor printing quality.

[0005] In order to solve the above problems, the present application adopts the following technical scheme:

[0006] In a first aspect, the present application discloses a printing head device, comprising a printing head frame, an inkjet mechanism and a wetting mechanism, the inkjet mechanism and the wetting mechanism are arranged on the printing head frame, the bottom of the printing head frame is provided with a mounting hole and a wetting hole which are spaced apart and face the printing surface, the inkjet mechanism comprises a nozzle assembly, the nozzle assembly is arranged in the mounting hole, the wetting mechanism comprises a water storage cavity, a humidifying piece and a wetting channel, the water storage cavity, the humidifying piece and the wetting channel are sequentially connected, the wetting channel is arranged at the bottom of the printing head frame and is connected with the wetting hole.

[0007] In one embodiment, a mounting groove is formed in the inner side of the bottom of the printing head frame, the wetting hole is formed in the mounting groove, and the wetting channel is arranged in the mounting groove.

[0008] In one embodiment, a plurality of wetting holes are formed in the mounting groove, a plurality of water outlets are formed in the wetting channel, and each wetting hole is connected with a corresponding water outlet.

[0009] In one embodiment, the bottom of the printhead frame is provided with a plurality of mounting holes spaced apart, the printhead assemblies are sequentially disposed in the mounting holes, and the wetting channel is located between the plurality of printhead assemblies.

[0010] In one embodiment, the wetting channel is arranged around the nozzle assembly.

[0011] In one embodiment, a liquid level sensor is provided in the water storage cavity, and the liquid level sensor is used to detect the liquid level in the water storage cavity.

[0012] In one embodiment, the wetting mechanism further includes a humidity detector disposed at the bottom of the printhead frame, the humidity detector being used to detect the humidity of the printhead assembly.

[0013] In one embodiment, the humidification mechanism includes a control unit connected to the humidity detector and the humidifier, and the control unit controls the operation of the humidifier through feedback information from the humidity detector.

[0014] In one embodiment, the humidifying element is an ultrasonic humidifying device.

[0015] Secondly, embodiments of the present invention disclose a 3D printing device, including the print head device described above.

[0016] The technical solution adopted in this invention can achieve the following beneficial effects:

[0017] In the printhead device disclosed in this embodiment of the invention, by improving the structure of the printhead frame and adding a corresponding wetting mechanism, the wetting mechanism works during the printing process, and the sprayed mist humidifies and moisturizes the printhead assembly, avoiding the deterioration of inkjet performance caused by the dryness of the printhead assembly, and alleviating the problem of nozzle blockage caused by the crystallization and solidification of the adhesive remaining at the bottom of the printhead frame after prolonged contact with air. In this way, the printing effect can be improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the printhead device disclosed in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A structural diagram from another perspective;

[0020] Figure 3 for Figure 1 A schematic diagram of the bottom surface;

[0021] Figure 4 This is a schematic diagram of the structure of a printhead device disclosed in another embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100-Printhead frame, 110-Mounting hole, 120-Wetting hole, 200-Inkjet mechanism, 210-Printhead assembly, 300-Wetting mechanism, 310-Water storage chamber, 320-Humidifier, 330-Wetting channel, 340-Humidity detector. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figures 1-4 As shown, an embodiment of the present invention discloses a printhead device, which includes a printhead frame 100, an inkjet mechanism 200, and a wetting mechanism 300.

[0028] The print head frame 100 is a main body component of the print head device, the print head frame 100 provides mounting positions for other components of the print head device, the ink ejection mechanism 200 and the wetting mechanism 300 are both arranged on the print head frame 100, the bottom of the print head frame 100 is spaced apart to provide a mounting hole 110 and a wetting hole 120 facing the printing surface, the ink ejection mechanism 200 includes a nozzle assembly 210, the nozzle assembly 210 is arranged in the mounting hole 110, at this time, the nozzle assembly 210 can eject ink to the printing surface through the mounting hole 110 to realize the printing work. Specifically, at least part of the nozzle assembly 210 can be inlaid on the mounting hole 110, so that each nozzle of the nozzle assembly 210 protrudes from the bottom of the print head frame 100 to realize the ink ejection work.

[0029] At the same time, the wetting mechanism 300 includes a water storage cavity 310, a humidifying piece 320 and a wetting channel 330, the water storage cavity 310, the humidifying piece 320 and the wetting channel 330 are sequentially connected, the water storage cavity 310 is used for temporarily storing liquid water, the humidifying piece 320 is used for converting the liquid water into mist, and the wetting channel 330 is arranged at the bottom of the print head frame 100 and is connected with the wetting hole 120, at this time, the mist in the wetting channel 330 is sprayed towards the nozzle assembly 210 through the wetting hole 120.

[0030] From the above, it can be seen that in the print head device disclosed in the embodiment of the present application, the structure of the print head frame 100 is improved, and the corresponding wetting mechanism 300 is added, the wetting mechanism 300 works during the printing process, the sprayed mist realizes the humidification and moisturization of the nozzle assembly 210, avoids the deterioration of the ink ejection state caused by the dryness of the nozzle assembly 210, and alleviates the problem of nozzle blockage caused by the crystallization and solidification of the residual adhesive at the bottom of the print head frame 100 after long-time contact with air, thereby improving the printing effect.

[0031] In the embodiment of the present application, the bottom inner side of the print head frame 100 can be provided with a mounting groove, the wetting hole 120 described above can be arranged in the mounting groove, and the wetting channel 330 can be arranged in the mounting groove. In this case, the mounting groove provides a mounting position for the wetting channel 330, so as to facilitate the installation of the wetting channel 330, and this way can also make the wetting channel 330 and the wetting hole 120 better connected and communicated, thereby facilitating the circulation of the mist.

[0032] Further, a plurality of wet holes 120 can be arranged in the installation groove, and a plurality of water outlets can be arranged in the wet channel 330, each wet hole 120 being in communication with a corresponding water outlet. That is, each water outlet in the wet channel 330 corresponds to a wet hole 120, so as to facilitate the circulation of the mist. At the same time, this way makes the mist spread along the length direction of the wet channel 330, and then spread to a plurality of positions at the bottom of the print head frame 100, so as to facilitate the wetting of the nozzle assembly 210.

[0033] In an alternative embodiment, a plurality of installation holes 110 can be arranged at the bottom of the print head frame 100, and the nozzle assembly 210 can be arranged in the installation hole 110 in sequence, and the wet channel 330 can be arranged between the plurality of nozzle assemblies 210. In this case, the wet channel 330 can greatly meet the wetting effect of the plurality of nozzle assemblies 210, so as to improve the wetting efficiency.

[0034] Further, the wet channel 330 can be arranged around the nozzle assembly 210. That is, the wet channel 330 can be arranged around the nozzle assembly 210 once, as shown in the figure, which can maximize the wetting of a plurality of positions of the nozzle assembly 210, so as to better ensure the wetting effect of the nozzle assembly 210, and better meet the printing requirements. Figure 4

[0035] Correspondingly, the outlet of the wet hole 120 can be inclined towards the nozzle assembly 210, so that the mist discharged from the wet hole 120 is directed towards the nozzle assembly 210, thereby better wetting and moisturizing the nozzle assembly 210.

[0036] In the disclosed embodiment, a liquid level sensor can be arranged in the water storage cavity 310, and the liquid level sensor can be used to detect the liquid level in the water storage cavity 310. In the specific working process, the liquid level sensor is used for detection, so that the liquid in the water storage cavity 310 always meets the use requirements, thereby improving the working efficiency.

[0037] In an alternative embodiment, the wetting mechanism 300 can further include a humidity detector 340, which can be arranged at the bottom of the print head frame 100, and the humidity detector 340 is used to detect the humidity of the nozzle assembly 210. Specifically, the current environmental humidity value is analyzed by the humidity detector 340, and the current detected humidity is compared with the humidity set target value, to determine whether to start the humidification function and the humidification gear. If the humidity reaches the target humidity control range after humidification, the wetting mechanism 300 is closed.

[0038] ​In the disclosed embodiment, the wetting mechanism 300 can further comprise a control unit, which can be connected with the humidity detector 340 and the humidifying member 320, and the control unit controls the operation of the humidifying member 320 through the feedback information of the humidity detector 340. Specifically, when the printer starts printing, the control function of the wetting mechanism 300 is started synchronously; the current humidity detection value is compared with the humidity target value, and according to the numerical range of the difference value, it is determined whether to start the humidifying function and the gear of humidifying; the current printer working state is automatically judged, if the printer is in the state of executing inkjet, the wetting mechanism 300 can be closed according to the setting to avoid the influence of humidifying on inkjet and powder laying; whether there is liquid in the water storage cavity can be judged according to the liquid level sensor, if there is no liquid, the wetting mechanism 300 can be automatically closed and an alarm prompt is made; if the humidity reaches the target humidity control range after humidifying, the wetting mechanism 300 is automatically closed. This method can realize the automatic control of the wetting mechanism 300, so as to improve the production efficiency.

[0039] In an alternative embodiment, the humidifying member 320 can be an ultrasonic humidifying device. The ultrasonic humidifier uses ultrasonic high-frequency oscillation to atomize water into 1-5 micron super-micron particles, and through the air moving device, the water mist is diffused into the air, so that the air is humidified and rich in negative oxygen ions, so that the wetting and moisturizing of the print head assembly 210 can be better realized. Of course, the humidifying member 320 can also be other parts, and the embodiments of the present application do not limit this.

[0040] Based on the print head device disclosed in the embodiments of the present application, a 3D printing equipment is also disclosed, which comprises the print head device described in any of the above embodiments.

[0041] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but cannot be understood as the limitation of the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A printhead device, characterized by, The inkjet printing head device comprises a printing head frame (100), an inkjet mechanism (200) and a wetting mechanism (300), the inkjet mechanism (200) and the wetting mechanism (300) are arranged on the printing head frame (100), the bottom of the printing head frame (100) is provided with mounting holes (110) and wetting holes (120) facing a printing surface, the inkjet mechanism (200) comprises a nozzle assembly (210), the nozzle assembly (210) is arranged in the mounting hole (110), the wetting mechanism (300) comprises a water storage cavity (310), a wetting piece (320) and a wetting channel (330), the water storage cavity (310), the wetting piece (320) and the wetting channel (330) are sequentially connected, the wetting channel (330) is arranged at the bottom of the printing head frame (100) and is connected with the wetting hole (120).

2. The printhead device of claim 1, wherein, The bottom of the printing head frame (100) is provided with an installation groove, the wetting hole (120) is arranged in the installation groove, and the wetting channel (330) is arranged in the installation groove.

3. The printhead device of claim 2, wherein, A plurality of wetting holes (120) are arranged in the installation groove, a plurality of water outlets are arranged in the wetting channel (330), and each wetting hole (120) is connected with a corresponding water outlet.

4. The printhead device of claim 1, wherein, A plurality of mounting holes (110) are arranged in the bottom of the printing head frame (100), the nozzle assembly (210) is arranged in the mounting hole (110) in sequence, and the wetting channel (330) is arranged between the nozzle assemblies (210).

5. The printhead device of claim 1, wherein, The wetting channel (330) surrounds the nozzle assembly (210).

6. The printhead device of claim 1, wherein, A liquid level sensor is arranged in the water storage cavity (310), and the liquid level sensor is used for detecting the liquid level in the water storage cavity (310).

7. The printhead device of claim 1, wherein, The wetting mechanism (300) further comprises a humidity detector (340), the humidity detector (340) is arranged at the bottom of the printing head frame (100), and the humidity detector (340) is used for detecting the humidity of the nozzle assembly (210).

8. The printhead device of claim 7, wherein, The wetting mechanism (300) comprises a control unit, the control unit is connected with the humidity detector (340) and the wetting piece (320), and the control unit controls the operation of the wetting piece (320) through feedback information of the humidity detector (340).

9. The printhead device of claim 1, wherein, The wetting piece (320) is an ultrasonic humidifying device.

10. A 3D printing device, characterized by The inkjet printing head device comprises the printing head device according to any one of claims 1 to 9.

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