3D direct-writing printing multifunctional spray head device with hasp structure

Abstract

The 3D direct-writing printing multifunctional spray head device with the hasp structure comprises a shell, an extrusion screw and a driving unit, the shell comprises a tower stacking mechanism, a spray throat and a spray nozzle, the tower stacking mechanism comprises a tower footing, a first hoop, a tower bottom and a first hasp, and a first annular groove is formed in the bottom of the tower footing; the first hoop is installed in the first annular groove and at least partially protrudes outwards, a first hasp is installed at the top of the tower bottom, the first hoop is used for being buckled by the first hasp, the tower bottom is connected with the spraying throat, a nozzle is installed at the bottom of the spraying throat, and an inner cavity is formed in the shell; the extrusion screw rod is mounted in the inner cavity; and the driving unit is connected with the extrusion screw rod. According to the technical scheme, the shell comprises the tower stacking mechanism and the spraying throat, the tower footing and the tower bottom of the tower stacking mechanism are connected through the tower buckle, dismounting and mounting are convenient, tower bottoms of different lengths can be replaced according to actual requirements, in addition, the length of the spraying throat can be replaced according to actual requirements, the shell can be applied to more ranges, and application is more flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D direct writing printing, and in particular to a 3D direct writing printing multifunctional nozzle device with a buckle structure. Background Art

[0002] 3D direct ink writing (DIW) is an additive manufacturing technology that builds three-dimensional structures layer by layer by precisely controlling the extrusion and deposition of highly viscous elastic materials. Its core feature is the use of functional "ink" (such as ceramic slurry, hydrogel, conductive material, etc.) to directly write and shape, without the need for external forces such as photocuring or high-temperature sintering, and is suitable for complex geometric structures and multi-material integration.

[0003] The length of the shell of the existing 3D direct writing printing head device is generally fixed, and its length cannot be changed according to the length of the extrusion screw or actual usage, and its scope of application is limited. Summary of the invention

[0004] To this end, it is necessary to provide a 3D direct writing printing multifunctional nozzle device with a buckle structure to solve the technical problem that the length of the shell of the existing 3D direct writing printing nozzle device is generally fixed, and its length cannot be changed according to the length of the extrusion screw or actual usage, and the scope of application is limited.

[0005] To achieve the above object, the present invention provides a 3D direct writing printing multifunctional nozzle device with a buckle structure, comprising:

[0006] The outer shell comprises a tower stacking mechanism, a nozzle and a nozzle. The tower stacking mechanism comprises a tower base, a first hoop, a tower bottom and a first buckle. The bottom of the tower base is provided with a first annular groove. The first hoop is installed in the first annular groove and at least partially protrudes outward. The top of the tower bottom is provided with a first buckle. The first hoop is used for being buckled by the first buckle. The bottom of the tower bottom is connected to the top of the nozzle. The bottom of the nozzle is provided with a nozzle. The outer shell has an inner cavity.

[0007] An extrusion screw, the extrusion screw is installed in the inner cavity;

[0008] A driving unit is connected to the extrusion screw and is used to drive the extrusion screw to rotate in the inner cavity.

[0009] As an embodiment of the present invention, the tower stacking mechanism also includes a tower body assembly, which is installed between the tower base and the tower bottom. The tower body assembly includes a tower body, a second tower buckle and a second hoop. The second tower buckle is installed on the top of the tower body, and the second tower buckle is used to buckle the first hoop. A second annular groove is opened at the bottom of the tower body, and the second hoop is installed in the second annular groove and at least partially protrudes outward, and the second hoop is used to be buckled by the first buckle.

[0010] As an embodiment of the present invention, more than two groups of tower body assemblies are provided, and the two or more groups of tower body assemblies are stacked in a vertical direction and sealed connected, the top tower body assembly is used to be sealed connected to the tower base, and the bottom tower body assembly is used to be sealed connected to the tower bottom.

[0011] As an embodiment of the present invention, the tower stacking mechanism further includes more than two first protrusions, and the first protrusions are evenly installed on the outer surface of the tower base, the tower bottom and the tower body.

[0012] As an implementation mode of the present invention, positioning grooves are provided at the bottom of the tower base and the bottom of the tower body, and the positioning grooves are used to position the first buckle and the second tower buckle and allow the first buckle and the second tower buckle to be placed.

[0013] As an embodiment of the present invention, the tower stacking mechanism further includes two or more sealing rings, and the tower base and the tower body, as well as the tower body and the tower bottom are connected via the sealing rings.

[0014] As an embodiment of the present invention, the portion of the first buckle used to buckle the first hoop is chamfered.

[0015] As an embodiment of the present invention, a 3D direct writing printing multifunctional nozzle device with a buckle structure also includes a sealing device, which is installed between the top of the tower base and the top of the extrusion screw. The sealing device includes a sealing spring rubber sleeve and a second protrusion. The sealing spring rubber sleeve and the second protrusion are sleeved outside the top of the extrusion screw, and the second protrusion is installed below the sealing spring rubber sleeve, and the second protrusion is in an inverted trapezoidal shape.

[0016] As an embodiment of the present invention, the housing is provided with outer cavities on both sides of the inner cavity, the outer cavity includes an external liquid inlet and an internal liquid outlet, and the internal liquid outlet of the outer cavity is connected to the inner cavity through a liquid inlet channel;

[0017] The 3D direct writing printing multifunctional nozzle device with a buckle structure also includes a one-way valve, which is installed on the liquid inlet channel and is used to limit the material in the inner cavity from flowing out of the outer cavity.

[0018] As an embodiment of the present invention, three or more first buckles are evenly distributed around the circumference of the top of the tower bottom.

[0019] Different from the prior art, the shell of the above technical solution includes a tower stacking mechanism and a nozzle. The tower base and the tower bottom of the tower stacking mechanism are connected by a tower buckle, which is convenient for disassembly and assembly and the tower bottom can be replaced with different lengths according to actual needs. In addition, the tower bottom is connected to the nozzle, and the length of the nozzle can also be replaced with different lengths according to actual needs, so that the shell can be applied to a wider range and is more flexible.

[0020] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0022] In the drawings of the specification:

[0023] Figure 1 This is a structural schematic diagram of a 3D direct writing printing multifunctional nozzle device with a buckle structure according to one embodiment of the present application;

[0024] Figure 2 This is a front view of a 3D direct writing printing multifunctional nozzle device with a buckle structure according to one embodiment of the present application;

[0025] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0026] Figure 4 This is a schematic structural diagram of a tower stacking mechanism according to an embodiment of the present application;

[0027] Figure 5 A cross-sectional view of a tower stacking mechanism according to an embodiment of the present application;

[0028] Figure 6 for Figure 5 Enlarged view of E in the middle;

[0029] Figure 7 for Figure 3 Enlarged view of middle B;

[0030] Figure 8 for Figure 4 Cross-sectional view of the middle DD;

[0031] Fig. 9 for Figure 3 Enlarged view of middle C;

[0032] Fig.10 This is a schematic structural diagram of an embodiment of the present application in which an inner cavity and an outer cavity are connected via a liquid inlet channel.

[0033] The reference numerals in the above drawings are described as follows:

[0034] 100-a multifunctional nozzle device for 3D direct writing printing with a buckle structure; 1-housing; 11-tower stacking mechanism; 111-tower base; 1111-a first annular groove; 112-a first hoop; 113-tower bottom; 114-a first buckle; 115-tower body assembly; 1151-tower body; 1152-a second tower buckle; 1153-a second hoop; 1154-a second annular groove; 116-a first protrusion; 117-a positioning groove; 118-a sealing ring; 12-a nozzle; 13-a nozzle; 14-an inner cavity; 15-an outer cavity; 16-a liquid inlet channel; 17-a third protrusion; 2-an extrusion screw; 3-a driving unit; 4-a sealing device; 41-a sealing spring rubber sleeve; 42-a second protrusion; 43-a bearing; 5-a one-way valve; X-a vertical direction. DETAILED DESCRIPTION

[0035] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0036] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0037] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0039] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0040] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0041] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0042] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0043] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] According to some embodiments of the present application, please refer to Figures 1 to 10The present embodiment relates to a 3D direct writing printing multifunctional nozzle device 100 with a buckle structure, including a shell 1, an extrusion screw 2 and a driving unit 3. The shell 1 includes a tower stacking mechanism 11, a nozzle 12 and a nozzle 13. The tower stacking mechanism 11 includes a tower base 111, a first hoop 112, a tower bottom 113 and a first buckle 114. The bottom of the tower base 111 is provided with a first annular groove 1111, the first hoop 112 is installed in the first annular groove 1111 and at least partially protrudes outward, the top of the tower bottom 113 is provided with a first buckle 114, the first hoop 112 is used for being buckled by the first buckle 114, the bottom of the tower bottom 113 is connected to the top of the nozzle 12, the bottom of the nozzle 12 is provided with a nozzle 13, and the shell 1 has an inner cavity 14; the extrusion screw 2 is installed in the inner cavity 14; the driving unit 3 is connected to the extrusion screw 2, and the driving unit 3 is used to drive the extrusion screw 2 to rotate in the inner cavity 14.

[0045] The top of the tower base 111 is evenly distributed around its circumference and has more than two feed ports, each of which can be fed with different materials, ensuring that multiple materials can enter the inner cavity 14 and mix at the same time, and the mixing effect is better. One of the first hoop 112 and the first buckle 114 can be set as an elastic structure to ensure that the first buckle 114 can buckle the first hoop 112 and facilitate subsequent disassembly. For example: the first hoop 112 is set as an elastomer, which can be metal or a plastic with strong toughness, such as nylon, PP, ABS, etc., and the first buckle 114 is a metal tower buckle. Or the first hoop 112 is set as a steel ring with a certain weight, and the first buckle 114 is an elastomer, which can be metal or plastic.

[0046] The nozzle 12 and the nozzle 13 can be connected by snapping or magnetic attraction. The nozzle 13 can be flexibly replaced with different apertures to extrude lines of different thicknesses, thereby controlling the print calibration and controlling the accuracy and fineness of the print model.

[0047] The extrusion screw 2 can be made of non-metallic material, such as PA, PP, ABS, to increase the life of the extrusion screw 2 and reduce the use cost and maintenance cost.

[0048] The driving unit 3 may be a power source such as an electric motor or a motor to drive the extrusion screw 2 to rotate in the inner cavity 14 .

[0049] The shell of the above technical solution includes a tower stacking mechanism 11 and a nozzle 12. The tower base 111 and the tower bottom 113 of the tower stacking mechanism 11 are connected by a tower buckle, which is convenient for disassembly and assembly, and the tower bottom 113 of different lengths can be replaced according to actual needs. In addition, the tower bottom 113 is connected to the nozzle 12, and the length of the nozzle 12 can also be replaced with different lengths according to actual needs, so that the shell can be applied to a wider range and is more flexible.

[0050] According to some embodiments of the present application, optionally, Figures 2 to 4 and Figure 7 As shown, the tower stacking mechanism 11 also includes a tower body assembly 115, which is installed between the tower base 111 and the tower bottom 113. The tower body assembly 115 includes a tower body 1151, a second tower buckle 1152 and a second hoop 1153. The second tower buckle 1152 is installed on the top of the tower body 1151, and the second tower buckle 1152 is used to buckle the first hoop 112. A second annular groove 1154 is provided at the bottom of the tower body 1151. The second hoop 1153 is installed in the second annular groove 1154 and at least partially protrudes outward. The second hoop 1153 is used to be buckled by the first buckle 114.

[0051] Similarly, when the first hoop 112 is an elastic body, the second tower buckle 1152 is a metal tower buckle, and the second hoop 1153 also needs to be an elastic body. When the first hoop 112 is a steel ring with a certain weight, the second tower buckle 1152 is an elastic body, and the second hoop 1153 also needs to be a steel ring with a certain weight.

[0052] The tower body assembly 115 is connected to the tower base 111 and the tower bottom 113 by the tower buckle, which is convenient for installation and disassembly. When the tower stacking mechanism 11 needs to be lengthened, it is not necessary to replace the unused tower bottom 113. The tower body assembly 115 is directly connected to the tower base 111 and the tower bottom 113 by the tower buckle, so that the tower stacking mechanism 11 can be lengthened, which is more convenient.

[0053] According to some embodiments of the present application, optionally, Figure 3 and Figure 8 As shown, the tower stacking mechanism 11 and the nozzle throat 12 are provided with a pyramid-shaped third protrusion 17 protruding toward the extrusion screw 2 .

[0054] After multiple materials enter the inner cavity 14, in addition to being mixed under the action of the extrusion screw 2, the third protrusion 17 can interfere with the flow direction of the materials, prolong the residence time in the inner cavity 14 and divide the materials into multiple branches, and the separated materials reunite; on the other hand, the third protrusion 17 of the pyramid has multiple inclined surfaces that can cut the materials from different angles, generate multi-directional vortices, and more effectively break the flow of materials to make the mixing more uniform. Therefore, the mixing effect of the materials can be improved by the third protrusion 17 in the shape of a pyramid. In addition, the inclined surface of the pyramid can guide the materials to slide along the inclined surface, reduce the adhesion or retention of materials, and reduce the risk of dead zones. At the same time, the streamlined inclined surface of the pyramid can reduce the flow resistance. Compared with the right-angle protrusion, the pressure loss is reduced by 10% to 20%, and the energy consumption is lower at the same mixing efficiency.

[0055] Since the lengths of the tower stacking mechanism 11 and the nozzle 12 are variable, the consumables can achieve a better mixing effect by rotating the extrusion screw, cutting and diverting the flow by the pyramid-shaped third protrusion 17, and extending the tower stacking mechanism 11 and the nozzle 12 (the denser the pyramid-shaped third protrusions 17 arranged inside).

[0056] According to some embodiments of the present application, optionally, Figures 2 to 4 As shown, more than two groups of tower body components 115 are provided, and the more than two groups of tower body components 115 are stacked and sealed in the vertical direction X. The top tower body component 115 is used to be sealed and connected to the tower base 111, and the bottom tower body component 115 is used to be sealed and connected to the tower bottom 113.

[0057] Multiple groups of tower body components 115 can be provided, and multiple groups of tower body components 115 are stacked along the vertical direction X and sealed by sealing rings 118 to prevent the consumables in the inner cavity 14 from flowing out through the gaps between the tower body components 115. Therefore, the number of tower body components 115 to be stacked can be determined according to the actual length requirement of the tower stacking mechanism 11, and the length of the tower stacking mechanism 11 can be changed by simply changing the number of tower body components 115, which makes the adjustment more flexible and convenient.

[0058] According to some embodiments of the present application, optionally, Figure 2 and Figure 4 As shown, the tower stacking mechanism 11 further includes more than two first protrusions 116 , and the first protrusions 116 are evenly installed on the outer surfaces of the tower base 111 , the tower bottom 113 and the tower body 1151 .

[0059] The first protrusion 116 may be composed of a plurality of protrusions. In this embodiment, the first protrusion 116 is composed of three protrusions. The first protrusion is used to increase the friction of the outer surface of the tower base 111, the tower bottom 113 and the tower body 1151, so as to facilitate the subsequent use of the first protrusion 116 as a grip point for manually rotating the tower stacking mechanism 11, and adjusting the different angles of the pyramid-shaped protrusions in the inner cavity 14, so as to make the consumables mixed more evenly.

[0060] According to some embodiments of the present application, optionally, Figure 4 , Figure 6 and Figure 7 As shown, the bottom of the tower base 111 and the bottom of the tower body 1151 are both provided with positioning grooves 117 , and the positioning grooves 117 are used to position the first buckle 114 and the second tower buckle 1152 , and to allow the first buckle 114 and the second tower buckle 1152 to be placed.

[0061] The positioning groove 117 is provided to facilitate the connection between the second tower buckle 1152 and the first hoop 112. The positioning groove 117 guides the second tower buckle 1152 to connect with the first hoop 112 in the positioning groove 117, and can accommodate the second tower buckle 1152 to prevent the second tower buckle 1152 from protruding and affecting the appearance. Similarly, when the first buckle 114 is connected to the second hoop 1153, the positioning groove 117 guides the first buckle 114 to connect with the second hoop 1153 in the positioning groove 117, and can accommodate the first buckle 114 to prevent the first buckle 114 from protruding and affecting the appearance.

[0062] According to some embodiments of the present application, optionally, Figure 3 As shown, the tower stacking mechanism 11 further includes more than two sealing rings 118 , and the tower base 111 and the tower body 1151 , as well as the tower body 1151 and the tower bottom 113 are connected via the sealing rings 118 .

[0063] The sealing ring 118 is provided for sealing connection, thereby preventing the consumables in the inner cavity 14 from flowing out through the gap between the tower base 111 and the tower body 1151 and the gap between the tower body 1151 and the tower bottom 113 .

[0064] According to some embodiments of the present application, optionally, Figure 6 As shown, the portion of the first buckle 114 used to buckle the first hoop 112 is chamfered.

[0065] The first buckle 114 is chamfered at the part for buckling the first hoop 112, and the chamfered structure facilitates squeezing the first clamp into and buckling the first clamp. Similarly, when the tower assembly 115 is installed between the tower base 111 and the tower bottom 113, the second tower buckle 1152 is also chamfered at the part for buckling the first hoop 112.

[0066] According to some embodiments of the present application, optionally, Fig. 9 As shown, the 3D direct writing printing multifunctional nozzle device 100 with a buckle structure also includes a sealing device 4, which is installed between the top of the tower base 111 and the top of the extrusion screw 2. The sealing device 4 includes a sealing spring rubber sleeve 41 and a second protrusion 42. The sealing spring rubber sleeve 41 and the second protrusion 42 are sleeved outside the top of the extrusion screw 2, and the second protrusion 42 is installed below the sealing spring rubber sleeve 41, and the second protrusion 42 is an inverted trapezoid.

[0067] The purpose of setting the second protrusion 42 on the sealing spring rubber sleeve 41 is to form a zero-to-zero sealing space between the second protrusion 42 and the tower base 111, so as to achieve a more perfect sealing effect. Among them, there is a spring ring in the sealing spring rubber sleeve 41, which is used to tighten the inner hole of the rubber sleeve to improve the sealing effect and enhance the sealing degree. In some embodiments, the sealing device 4 also includes a shaft sleeve, which is also sleeved on the top of the extrusion screw 2 and installed above the sealing spring rubber sleeve 41. The purpose of setting the bearing 43 is 1) to locate and consolidate the center position of the extrusion screw to avoid deviation of the screw. The bearing 43 is made of a harder material, such as metal, and the sealing spring rubber sleeve 41 is made of a softer material with better toughness. The extrusion screw and the drive unit 3 need to be center-to-center.

[0068] 2) Reduce the resistance of the extrusion screw to rotation and extend the service life of the extrusion screw and the sealing spring rubber sleeve 41. 3) The bearing 43 is used to orient and stabilize the rotation axis of the extrusion screw to avoid eccentric rotation of the extrusion screw, which causes the sealing spring rubber sleeve 41 to wear faster, extend the service life of the sealing spring rubber sleeve 41, and ensure the sealing degree of the sealing spring rubber sleeve 41.

[0069] According to some embodiments of the present application, optionally, Figure 3 and Figure 8 As shown, the outer cavity 15 is opened on both sides of the inner cavity 14 of the outer cavity 15, and the outer cavity 15 includes an external liquid inlet and an internal liquid outlet. The internal liquid outlet of the outer cavity 15 is connected with the inner cavity 14 through the liquid inlet channel 16; the 3D direct writing printing multifunctional nozzle device 100 with a buckle structure also includes a one-way valve 5, which is installed on the liquid inlet channel 16, and the one-way valve 5 is used to limit the material in the inner cavity 14 from flowing out of the outer cavity 15.

[0070] Two or more outer cavities 15 are provided at intervals on the side of the housing 1 along the vertical direction X. The plurality of outer cavities 15 are provided so that as much liquid as possible flows into the inner cavity 14 or the outer cavities 15 are filled with sufficient coolant to ensure a cooling effect.

[0071] The inner cavity 14 can be cleaned by flowing water or cleaning agent into the outer cavity 15 , and the extrusion screw 2 in the inner cavity 14 can be cleaned under the action of the driving unit 3 , which is easy to operate and does not require disassembling the entire nozzle device.

[0072] According to some embodiments of the present application, optionally, the top of the tower bottom 113 is evenly provided with three or more first buckles 114 around its circumference.

[0073] Arranging more than three first buckles 114 ensures the stability and firmness of the connection between the tower bottom 113 and the tower base 111. When the tower body assembly 115 is installed between the tower base 111 and the tower bottom 113, more than three second tower buckles 1152 need to be evenly arranged around the top of the tower body 1151.

[0074] The working principle of a 3D direct writing printing multifunctional nozzle device 100 with a buckle structure is as follows:

[0075] A variety of materials enter the feed port through an external controller, and the external controller can accurately control the input amount of the materials, and a variety of materials enter the inner cavity 14 for mixing. Through the rotation and extrusion of the extrusion screw, the cutting and diversion of the pyramid-shaped third protrusion 17, and the extension of the tower stacking mechanism 11 and the nozzle 12, the consumables can achieve a better mixing effect. When cleaning is required, water or other cleaning agents enter the inner cavity 14 through the liquid inlet channel 16 from the outer cavity 15. The inner cavity 14 can be automatically cleaned under the rotation of the screw, and there is no need to remove the device for cleaning one by one. In addition, the outer cavity 15 can also be used for temperature control. Specifically, the outer cavity 15 is filled with liquid at a fixed temperature. At this time, the air pressure between the inner cavity 14 and the outer cavity 15 is balanced, and the temperature of the outer cavity 15 is transmitted to the inner cavity 14 through the cavity wall to ensure that the temperature of the inner cavity 14 does not change, so that the consumables maintain a stable fluid state, the printing state is more stable, and the printing results are more beautiful, reducing the manual operation required for post-processing due to unsightly printing results.

[0076] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A 3D direct writing printing multifunctional nozzle device with a buckle structure, characterized in that: include: A shell, the shell comprising a tower stacking mechanism, a nozzle and a nozzle, the tower stacking mechanism comprising a tower base, a first hoop, a tower bottom and a first buckle, the bottom of the tower base is provided with a first annular groove, the first hoop is installed in the first annular groove and at least partially protrudes outward, the top of the tower bottom is provided with the first buckle, the first hoop is used for being buckled by the first buckle, the bottom of the tower bottom is connected to the top of the nozzle, the bottom of the nozzle is provided with the nozzle, and the shell has an inner cavity; an extrusion screw, the extrusion screw being installed in the inner cavity; A driving unit is connected to the extrusion screw, and the driving unit is used to drive the extrusion screw to rotate in the inner cavity.

2. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 1, characterized in that: The tower stacking mechanism also includes a tower body assembly, which is installed between the tower base and the tower bottom. The tower body assembly includes a tower body, a second tower buckle and a second hoop. The second tower buckle is installed on the top of the tower body, and the second tower buckle is used to buckle the first hoop. A second annular groove is opened at the bottom of the tower body, and the second hoop is installed in the second annular groove and at least partially protrudes outward, and the second hoop is used to be buckled by the first buckle.

3. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 2, characterized in that: The tower body components are provided in more than two groups, and the two or more groups of tower body components are stacked in a vertical direction and sealed connected. The tower body components at the top are used to be sealed connected to the tower base, and the tower body components at the bottom are used to be sealed connected to the tower bottom.

4. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 2, characterized in that: The tower stacking mechanism further includes more than two first protrusions, and the first protrusions are evenly installed on the outer surfaces of the tower base, the tower bottom and the tower body.

5. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 2, characterized in that: The bottom of the tower base and the bottom of the tower body are both provided with positioning grooves, and the positioning grooves are used to position the first buckle and the second tower buckle, and to place the first buckle and the second tower buckle.

6. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 2, characterized in that: The tower stacking mechanism further includes two or more sealing rings, and the tower base and the tower body are connected as well as the tower body and the tower bottom are connected via the sealing rings.

7. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 1, characterized in that: The portion of the first buckle used to buckle the first hoop is chamfered.

8. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 1, characterized in that: The 3D direct writing printing multifunctional nozzle device with a buckle structure also includes a sealing device, which is installed between the top of the tower base and the top of the extrusion screw. The sealing device includes a sealing spring rubber sleeve and a second protrusion. The sealing spring rubber sleeve and the second protrusion are sleeved outside the top of the extrusion screw. The second protrusion is installed below the sealing spring rubber sleeve, and the second protrusion is in an inverted trapezoidal shape.

9. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 1, characterized in that: The shell is provided with an outer cavity on both sides of the inner cavity, the outer cavity includes an external liquid inlet and an internal liquid outlet, and the internal liquid outlet of the outer cavity is connected with the inner cavity through a liquid inlet channel; The 3D direct writing printing multifunctional nozzle device with a buckle structure also includes a one-way valve, which is installed on the liquid inlet channel and is used to limit the material in the inner cavity from flowing out to the outer cavity.

10. The 3D direct writing printing multifunctional nozzle device with a buckle structure according to claim 1, characterized in that: The top of the tower bottom is evenly distributed with more than three first buckles around its circumference.

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