3D direct-writing printing multifunctional spray head device with one-way valve

Abstract

The 3D direct-writing printing multifunctional sprayer device comprises a shell, an extrusion screw, a driving unit and the one-way valve, an inner cavity is formed in the middle of the shell, a feeding port is formed in the top of the shell, a nozzle is arranged at the bottom of the shell, the feeding port and the nozzle are both communicated with the inner cavity, and outer cavities are formed in the positions, on the two sides of the inner cavity, of the shell. The outer cavity is communicated with the inner cavity through the liquid inlet channel; the extrusion screw rod is mounted in the inner cavity; the driving unit is connected with the extrusion screw rod; the one-way valve is installed on the liquid inlet channel and used for limiting materials in the inner cavity from flowing out of the outer cavity. According to the technical scheme, the outer cavity communicates with the inner cavity through the liquid inlet channel, and meanwhile materials in the inner cavity are limited to flow out of the outer cavity by arranging the one-way valve. Therefore, the inner cavity can be cleaned by flowing water or a cleaning agent into the outer cavity, the extrusion screw in the inner cavity can be cleaned under the action of the driving unit, the operation is simple, and the whole spray head device does not need to be disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing nozzle field especially relates to a 3D direct writing printing multifunctional nozzle device with check valve. BACKGROUND

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

[0003] The existing 3D direct writing printing nozzle device needs to be disassembled to clean the internal screw during cleaning, which is troublesome and time-consuming. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a 3D direct writing printing multifunctional nozzle device with a check valve, which solves the technical problem that the existing 3D direct writing printing nozzle device needs to be disassembled to clean the internal screw during cleaning, which is troublesome and time-consuming.

[0005] To achieve the above purpose, the inventors provide a 3D direct writing printing multifunctional nozzle device with a check valve, comprising:

[0006] The shell has an inner cavity in the middle, a feed inlet is provided at the top of the shell, and a nozzle is provided at the bottom of the shell. The feed inlet and the nozzle are in communication with the inner cavity. Outer cavities are provided on both sides of the inner cavity in the shell. The outer cavities include an external liquid inlet and an internal liquid outlet. The internal liquid outlet of the outer cavity is in communication with the inner cavity through a liquid inlet channel.

[0007] The extrusion screw is installed in the inner cavity.

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

[0009] The check valve is installed on the liquid inlet channel, and is used to limit the flow of materials in the inner cavity to the outer cavity.

[0010] Different from the prior art, the technical scheme of the present application provides an inner cavity and an outer cavity in the shell. The outer cavity is in communication with the inner cavity through a liquid inlet channel, and a check valve is provided to limit the flow of materials in the inner cavity to the outer cavity. In this way, water or cleaning agent can be flowed into the outer cavity for cleaning the inner cavity. The extrusion screw in the inner cavity can be cleaned under the action of the driving unit, which is simple to operate and does not need to disassemble the entire nozzle device.

[0011] As an embodiment of the present application, the 3D direct writing printing multifunctional nozzle device with a one-way valve further comprises a pressure controller, which is used to control the pressure between the outer cavity and the inner cavity.

[0012] In this way, the pressure controller is arranged to control the pressure between the outer cavity and the inner cavity, so as to control the conduction or non-conduction between the outer cavity and the inner cavity. Specifically, when the outer cavity and the inner cavity are not conducted, the air pressure of the inner cavity is consistent with that of the outer cavity; when the outer cavity and the inner cavity need to be conducted, the pressure controller controls the air pressure of the outer cavity to increase, so as to promote the liquid to be delivered to the inner cavity.

[0013] As an embodiment of the present application, the 3D direct writing printing multifunctional nozzle device with a one-way valve further comprises a temperature sensor, which is installed in the inner cavity and is used to detect the temperature in the inner cavity.

[0014] In this way, the temperature sensor is arranged to monitor the temperature of the inner cavity in real time, so as to avoid the temperature of the extrusion screw being too high during the extrusion operation.

[0015] As an embodiment of the present application, the 3D direct writing printing multifunctional nozzle device with a one-way valve further comprises a hose quick connector, the liquid outlet of the hose quick connector is connected in communication with the external liquid inlet.

[0016] In this way, the hose quick connector is arranged to be connected in communication with the outer cavity, and the hose quick connector plays a connecting role.

[0017] As an embodiment of the present application, the 3D direct writing printing multifunctional nozzle device with a one-way valve further comprises a cleaning assembly, which comprises a cleaning tank, a water pump and a cleaning pipe, the water pump is installed in the cleaning tank, the liquid outlet of the cleaning tank is connected in communication with the liquid inlet of the cleaning pipe, and the liquid outlet of the cleaning pipe is connected in communication with the liquid inlet of the hose quick connector.

[0018] In this way, the cleaning assembly is arranged to flow the water or cleaning agent in the cleaning tank into the outer cavity, and then into the inner cavity through the outer cavity, so as to play a cleaning effect. In some embodiments, the number of cleaning pipes is arranged according to the number of outer cavities. In other embodiments, the cleaning agent or water can be directly poured into the outer cavity.

[0019] As an embodiment of the present application, the 3D direct writing printing multifunctional nozzle device with a one-way valve further comprises a cooling tank, the liquid outlet of the cooling tank is connected in communication with the liquid inlet of the hose quick connector.

[0020] Therefore, the cooling tank is filled with cooling liquid, the cooling liquid is poured into the outer cavity, at this time, the air pressure between the inner cavity and the outer cavity is balanced, the temperature of the outer cavity is conducted to the inner cavity through the cavity wall, the temperature of the inner cavity is ensured not to change, the consumables are kept in a stable fluid state, the printing state is more stable, the printing result is more beautiful, and manual operation for post-processing due to the unattractive printing result is reduced.

[0021] As an embodiment of the utility model, two or more outer cavities are arranged on the side of the shell along the vertical direction.

[0022] Therefore, the plurality of outer cavities are arranged to enable as much liquid as possible to flow into the inner cavity or to fill the outer cavity with sufficient cooling liquid to ensure the cooling effect.

[0023] As an embodiment of the utility model, two or more feeding ports are arranged on the top of the shell around the circumference thereof.

[0024] Therefore, the two or more feeding ports are arranged, each feeding port can feed different materials, and the plurality of materials can be mixed simultaneously in the inner cavity, and the mixing effect is better.

[0025] As an embodiment of the utility model, the shell further comprises a feeding channel, and the feeding port and the inner cavity are connected in communication through the feeding channel.

[0026] Therefore, the feeding channel is arranged, the number of the feeding channel corresponds to the number of the feeding port, the individuality of each material is ensured, and each material can be mixed in the inner cavity through the feeding channel. In some embodiments, the feeding port is further connected in communication with the outside through a hose joint, and the material can be connected in communication with the feeding channel through the hose joint.

[0027] The above-mentioned utility model content related record is only the summary of the technical scheme of the application, in order to let the ordinary skilled person in the art can more clearly understand the technical scheme of the application, and then can be implemented according to the content recorded in the specification and the drawings, and in order to let the above-mentioned purpose of the application and other purposes, characteristics and advantages can be more easily understood, the following is explained in combination with the specific embodiment of the application and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings are only used to show the principles, implementation modes, applications, characteristics and effects of the specific embodiments of the application and other related contents, and cannot be considered as the limitation of the application.

[0029] In the drawings of the specification:

[0030] Figure 1 The structure schematic view of the 3D direct writing printing multifunctional nozzle device with a one-way valve according to an embodiment of the application;

[0031] Figure 2Front view of 3D direct writing printing multifunctional nozzle device with one-way valve for an embodiment of the present application;

[0032] Figure 3 For Figure 2 Sectional view of A-A in the figure;

[0033] Figure 4 Structure diagram of the connection between the inner cavity and the outer cavity through the liquid inlet channel for an embodiment of the present application;

[0034] Figure 5 Structure diagram of the connection between the outer cavity and the cleaning assembly for an embodiment of the present application.

[0035] The reference signs involved in the above-mentioned figures are explained as follows:

[0036] 100-3D direct writing printing multifunctional nozzle device with one-way valve; 1-outer shell; 11-inner cavity; 12-feeding port; 13-nozzle; 14-outer cavity; 15-liquid inlet channel; 16-feeding channel; 2-extrusion screw; 3-driving unit; 4-one-way valve; 5-temperature sensor; 6-hose quick connector; 7-cleaning assembly; 71-cleaning tank; 72-water pump; 73-cleaning pipe; 8-hose connector; X-vertical direction. DETAILED DESCRIPTION

[0037] In order to describe the possible application scenarios, technical principles, specific implementable schemes, and the purposes and effects that can be achieved of the present application in detail, the following will be described in detail in combination with the specific embodiments listed and with the aid of the accompanying drawings. The embodiments described in the present document are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0038] In the present document, the term “embodiment” means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term “embodiment” appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0039] Unless otherwise defined, the meanings of the technical terms used in the present document are the same as those commonly understood by the person skilled in the art to which the present application belongs; the use of related terms in the present document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0040] In the description of the present application, the phrase "and / or" is a description of a logical relationship between objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " herein generally represents that the associated objects before and after are an "or" logical relationship.

[0041] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary, or order relationship between the entities or operations.

[0042] In the present application, without more limitation, the "includes", "contains", "has" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the existence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0043] As the same understanding as in the "Guidelines for Examination", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.

[0044] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated 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.

[0045] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] According to some embodiments of this application, please refer to Figures 1 to 5 This embodiment relates to a 3D direct-write printing multifunctional nozzle device 100 with a one-way valve 4, including a housing 1, an extrusion screw 2, a drive unit 3, and a one-way valve 4. The housing 1 has an inner cavity 11 in the middle, an inlet 12 at the top of the housing 1, and a nozzle 13 at the bottom of the housing 1. Both the inlet 12 and the nozzle 13 are connected to the inner cavity 11. The housing 1 has outer cavities 14 on both sides of the inner cavity 11. The outer cavity 14 includes an external liquid inlet and an internal liquid outlet. The internal liquid outlet of the outer cavity 14 is connected to the inner cavity 11 through a liquid inlet channel 15. The extrusion screw 2 is installed in the inner cavity 11. The drive unit 3 is connected to the extrusion screw 2 and is used to drive the extrusion screw 2 to rotate in the inner cavity 11. The one-way valve 4 is installed on the liquid inlet channel 15 and is used to restrict the material in the inner cavity 11 from flowing out of the outer cavity 14.

[0047] The extrusion screw 2 can be made of non-metallic materials, such as PA, PP, or ABS, which increases the lifespan of the extrusion screw 2 and reduces usage and maintenance costs.

[0048] The drive unit 3 can be a power source such as an electric motor or motor to drive the extrusion screw 2 to rotate within the inner cavity 11.

[0049] The technical solution of this application includes an inner cavity 11 and an outer cavity 14 within the outer casing 1. The outer cavity 14 is connected to the inner cavity 11 via a liquid inlet channel 15, and a one-way valve 4 is provided to restrict the outflow of material from the inner cavity 11 to the outer cavity 14. Therefore, water or cleaning agent can be introduced into the outer cavity 14 to clean the inner cavity 11. The extrusion screw 2 within the inner cavity 11 can be cleaned under the action of the drive unit 3. The operation is simple and does not require disassembling the entire nozzle assembly.

[0050] According to some embodiments of this application, optionally, the 3D direct-write printing multi-function nozzle device 100 with one-way valve 4 also includes a pressure controller for controlling the pressure between the outer cavity 14 and the inner cavity 11.

[0051] Thus, the pressure controller is arranged to control the pressure between the outer cavity 14 and the inner cavity 11, thereby controlling the conduction or non-conduction between the outer cavity 14 and the inner cavity 11. Specifically, when the outer cavity 14 and the inner cavity 11 are not conducted, the air pressure of the inner cavity 11 is consistent with that of the outer cavity 14; when the outer cavity 14 and the inner cavity 11 need to be conducted, the pressure controller controls the air pressure of the outer cavity 14 to increase, thereby promoting the liquid to be delivered to the inner cavity 11. In some embodiments, the pressure controller can also control the pressure in the inner cavity 11, thereby controlling the outflow of the material in the inner cavity 11.

[0052] According to some embodiments of the present application, optionally, as shown in Figure 4 and Figure 5 , the 3D direct writing printing multifunctional nozzle device 100 with the one-way valve 4 further comprises a temperature sensor 5, which is installed in the inner cavity 11 and is used to detect the temperature in the inner cavity 11.

[0053] Thus, by arranging the temperature sensor 5, the temperature of the inner cavity 11 can be monitored in real time, thereby avoiding the temperature of the extrusion screw 2 being too high during the extrusion operation.

[0054] According to some embodiments of the present application, optionally, as shown in Figure 3 , the 3D direct writing printing multifunctional nozzle device 100 with the one-way valve 4 further comprises a hose quick connector 6, the liquid outlet of which is connected in communication with the external liquid inlet.

[0055] Thus, by arranging the hose quick connector 6, the hose quick connector 6 can be conveniently connected in communication with the outer cavity 14, thereby playing a connecting role.

[0056] According to some embodiments of the present application, optionally, as shown in Figure 5 , the 3D direct writing printing multifunctional nozzle device 100 with the one-way valve 4 further comprises a cleaning assembly 7, which comprises a cleaning tank 71, a water pump 72 and a cleaning pipe 73, the water pump 72 is installed in the cleaning tank 71, the liquid outlet of the cleaning tank 71 is connected in communication with the liquid inlet of the cleaning pipe 73, and the liquid outlet of the cleaning pipe 73 is connected in communication with the liquid inlet of the hose quick connector 6.

[0057] Thus, by arranging the cleaning assembly 7, the water or cleaning agent in the cleaning tank 71 can be conveniently flowed into the outer cavity 14, and then flowed into the inner cavity 11 through the outer cavity 14, thereby playing a cleaning effect. In some embodiments, the number of the cleaning pipes 73 is arranged according to the number of the outer cavities 14. In other embodiments, the cleaning agent or water can also be directly poured into the outer cavity 14.

[0058] According to some embodiments of the present application, optionally, the 3D direct writing printing multifunctional nozzle device 100 with the one-way valve 4 further comprises a cooling tank, the liquid outlet of which is connected in communication with the liquid inlet of the hose quick connector 6.

[0059] In this way, the cooling tank is filled with cooling liquid, and the cooling liquid is poured into the outer cavity 14. At this time, the air pressure between the inner cavity 11 and the outer cavity 14 is balanced, the temperature of the outer cavity 14 is conducted to the inner cavity 11 through the cavity wall, the temperature of the inner cavity 11 is ensured not to change, the consumables are kept in a stable fluid state, the printing state is more stable, the printing result is more beautiful, and the manual operation for post-processing due to the unattractive printing result is reduced.

[0060] According to some embodiments of the present application, optionally, as shown in Figure 3 The side surface of the shell 1 is spaced apart in the vertical direction X and provided with two or more outer cavities 14.

[0061] In this way, the plurality of outer cavities 14 is provided to enable as much liquid as possible to flow into the inner cavity 11 or to fill the outer cavity 14 with sufficient cooling liquid to ensure the cooling effect.

[0062] According to some embodiments of the present application, optionally, as shown in Figure 2 and Figure 3 The top of the shell 1 is uniformly distributed around the periphery and provided with two or more feed ports 12.

[0063] In this way, the two or more feed ports 12 are provided, each feed port 12 can feed different materials, and the plurality of materials can be simultaneously mixed into the inner cavity 11 to achieve better mixing effect.

[0064] According to some embodiments of the present application, optionally, as shown in Figure 3 The shell 1 further includes a feed channel 16, and the feed port 12 and the inner cavity 11 are connected through the feed channel 16.

[0065] In this way, the feed channel 16 is provided, the number of feed channels 16 corresponds to the number of feed ports 12, the individuality of each material is ensured, and each material can be mixed into the inner cavity 11 through the feed channel 16. In some embodiments, the feed port 12 is also connected to the outside through the hose joint 8, and the material can be connected to the feed channel 16 through the hose joint 8.

[0066] The working principle of the 3D direct writing printing multifunctional nozzle device 100 with the one-way valve 4 is as follows:

[0067] The auxiliary agent, water and the like enter the inner cavity 11 from the outer cavity 14 through the liquid inlet channel 15, and various materials are extruded into the inner cavity 11 through the feeding port 12 by controlling air, the external controller can accurately control the entering amount of various materials, and better dispersion and mixing effect is achieved by screw rotation extrusion and air pushing. When cleaning is needed, water or other cleaning agents enter the inner cavity 11 from the outer cavity 14 through the liquid inlet channel 15, and the inner cavity 11 can be automatically cleaned under the rotation of the screw, without the need to disassemble the device for cleaning one by one. In addition, the outer cavity 14 can also be used for temperature control. Specifically, the outer cavity 14 is filled with liquid at a fixed temperature, at this time, the air pressure between the inner cavity 11 and the outer cavity 14 is balanced, the temperature of the outer cavity 14 is conducted to the inner cavity 11 through the cavity wall, ensuring that the temperature of the inner cavity 11 does not change, so that the consumables remain in a stable fluid state, the printing state is more stable, the printing result is more beautiful, and the manual operation of post-processing due to the unattractive printing result is reduced.

[0068] Those skilled in the art will appreciate that a combination of features of different embodiments implies being within the scope of the application and forming a different embodiment, even though some embodiments herein include certain features and not others included in other embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0069] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A multi-functional printhead device for 3D direct-write printing with a one-way valve, characterized in that, include: The outer shell has an inner cavity in the middle, a feed inlet at the top, and a nozzle at the bottom. Both the feed inlet and the nozzle are connected to the inner cavity. The outer shell has outer cavities on both sides of the inner cavity. Each outer cavity includes an external liquid inlet and an internal liquid outlet. The internal liquid outlet of the outer cavity is connected to the inner cavity through a liquid inlet channel. An extrusion screw, wherein the extrusion screw is installed within the inner cavity; A drive unit is connected to the extrusion screw and is used to drive the extrusion screw to rotate within the inner cavity; A one-way valve is installed on the liquid inlet channel and is used to restrict the flow of material in the inner cavity to the outer cavity.

2. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 1, characterized in that, The 3D direct-write printing multi-functional printhead device with a one-way valve also includes a pressure controller for controlling the pressure between the outer cavity and the inner cavity.

3. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 1, characterized in that, The 3D direct-write printing multi-functional printhead device with a one-way valve also includes a temperature sensor installed inside the inner cavity, which is used to detect the temperature inside the inner cavity.

4. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 1, characterized in that, The 3D direct-write printing multi-functional nozzle device with a one-way valve also includes a quick-connect hose, the liquid outlet of which is connected to the external liquid inlet.

5. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 4, characterized in that, The 3D direct-write printing multi-functional nozzle device with a one-way valve also includes a cleaning assembly, which includes a cleaning tank, a water pump, and a cleaning pipe. The water pump is installed inside the cleaning tank, the outlet of the cleaning tank is connected to the inlet of the cleaning pipe, and the outlet of the cleaning pipe is connected to the inlet of the quick-connect hose.

6. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 4, characterized in that, The 3D direct-write printing multi-functional nozzle device with a one-way valve also includes a cooling tank, the outlet of which is connected to the inlet of the quick-connect hose.

7. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 1, characterized in that, The outer shell has two or more external cavities spaced apart vertically on its side.

8. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 1, characterized in that, The top of the outer casing has two or more feed ports evenly distributed around its circumference.

9. The 3D direct-write printing multi-functional printhead device with a one-way valve according to claim 1, characterized in that, The outer casing also includes a feeding channel, and the feeding port is connected to the inner cavity through the feeding channel.

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