3D printing nozzle assembly

Abstract

The utility model relates to the technical field of 3D printing, and discloses a 3D printing spray head assembly which comprises a mounting plate and a plate-shaped structure used for mounting. The spray pipe is fixedly arranged on one side of the mounting plate and used for conveying raw materials; the inner container assembly is arranged in the spray pipe cavity and used for protecting the inner wall of the spray pipe, the inner container assembly comprises a nozzle, a lining and a plug body, the lining is embedded in the inner wall of the mounting plate, the nozzle is detachably connected with the spray pipe, the nozzle abuts against the lower end of the lining and limits the lining in the mounting plate cavity, the plug body is slidably connected with the spray pipe, and the plug body can slide in the lining to discharge residual materials. By arranging the detachable nozzle and the liners, the liners can be arranged in a matched mode, the liners can be made of different materials such as ceramic or metal materials, the materials of the liners can be adjusted in a targeted mode according to different printing raw materials, the detachable nozzle and the liners can guarantee production adaptability and use flexibility, dismounting and mounting are convenient and fast, and the production efficiency is improved. Meanwhile, cleaning and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a 3D printing nozzle assembly. Background Art

[0002] 3D printing is a technology that constructs objects by taking a digital model file as a basis and transporting raw materials and printing layer by layer.

[0003] The prior art discloses a 3D printing nozzle (CN209478967U), which includes a coaxially arranged housing and a rotating shaft. The housing is provided with a cylindrical inner cavity. Construction materials are input into the inner cavity from the feed port and are transported by driving the rotating shaft to rotate through a driving mechanism. The rotating shaft is provided with axially continuously extending spiral blades.

[0004] In the prior art, an auger is arranged in the nozzle, and the auger is driven by a motor to promote discharging and clean the inner wall of the nozzle. However, the material of the nozzle is fixed, while the materials used for printing are variable. For example, paraffin or photosensitive resin. The photosensitive resin is a flowing liquid. In order to ensure its fluidity, it is necessary to minimize heat exchange during the flow process to prevent the resin from curing and coagulating. For paraffin, it is necessary to heat or cool it. Therefore, the nozzle with a fixed material has a lack of adaptability to raw materials. Summary of the Utility Model

[0005] The utility model mainly solves the technical problem that the adaptability of the above nozzle to different materials is poor, and provides a 3D printing nozzle assembly.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme. A 3D printing nozzle assembly includes:

[0007] A mounting plate, which is a plate-like structure for installation;

[0008] A nozzle pipe, fixedly arranged on one side of the mounting plate for transporting raw materials, and a feed pipe is fixedly installed on one side of the nozzle pipe;

[0009] An inner liner assembly, arranged in the cavity of the nozzle pipe for protecting the inner wall of the nozzle pipe. The inner liner assembly includes a nozzle, an inner liner and a plug body. The inner liner is embedded in the inner wall of the nozzle pipe. The nozzle is detachably connected to the nozzle pipe. The nozzle abuts against the lower end of the inner liner and limits the inner liner in the cavity of the nozzle pipe. The plug body is slidably connected to the nozzle pipe, and the plug body can slide in the inner liner to discharge residual materials.

[0010] As a preferred embodiment of the present utility model, the nozzle forms a cylindrical structure with an open lower end, the inner liner forms a tubular structure, the outer diameter of the inner liner is equal to the inner diameter of the nozzle, the inner liner is as high as the chamber of the nozzle, and a notch for avoiding the feed pipe is provided at the upper end of the inner liner. The notch is rectangular, and the width of the notch is equal to the diameter of the feed pipe.

[0011] As a preferred embodiment of the present utility model, the nozzle forms a funnel structure, the interior of the nozzle is hollow, an integrally formed retaining edge is provided on the upper end surface of the nozzle. The retaining edge is annular, teeth are provided on the inner wall of the retaining edge, tooth openings are provided on the outer wall of the nozzle, and the retaining edge is threadedly connected to the outer wall of the nozzle.

[0012] As a preferred embodiment of the present utility model, a limiting ring is fixedly installed on the outer wall of the nozzle, and the retaining edge can abut against the bottom of the limiting ring.

[0013] As a preferred embodiment of the present utility model, the plug body forms a circular plate structure, and the diameter of the plug body is equal to the inner diameter of the inner liner.

[0014] As a preferred embodiment of the present utility model, the inner container assembly further includes a push rod, and the push rod is fixedly connected to the plug body and slidably connected to the nozzle.

[0015] As a preferred embodiment of the present utility model, a hole adapted to the push rod is provided on the upper end surface of the nozzle, the push rod is slidably connected to the hole, side holes are provided on the wall surface of the push rod, and a limiting rod is slidably connected in the side holes. When the plug body abuts against the inner top surface of the nozzle, the limiting rod abuts against the outer top surface of the nozzle.

[0016] The present utility model provides a 3D printing nozzle assembly, which has the following beneficial effects:

[0017] 1. For this 3D printing nozzle assembly, by providing a detachable nozzle and inner liner, several inner liners can be provided in a matching manner, and each inner liner can be made of different materials, such as ceramic or metal materials. For different printing materials, the material of the inner liner can be adjusted accordingly. For example, when using photosensitive resin, it is necessary to reduce the heat loss during the discharge of the resin from the nozzle. At this time, a ceramic inner liner can be used to reduce the probability of solidification during printing. For alloy powders, some need to be heated or cooled. For example, paraffin requires a certain heat conduction effect, and a metal inner liner can be used to ensure the heating and cooling effects on the material. The detachable nozzle and inner liner can ensure production adaptability and use flexibility, are convenient to disassemble and assemble, and are also convenient for cleaning and maintenance.

[0018] 2. The 3D printing nozzle assembly. By loosening the nozzle, the size of the flange of the nozzle is fixed. There are multiple nozzles, and the sizes of the lower ports of the nozzles can be set differently to adjust the discharge amount by replacing the nozzles. Loosen the nozzle, separate the nozzle from the nozzle pipe, and then pull out the inner liner. Of course, the plug body can also be pushed. The plug body slides on the inner wall of the inner liner. The plug body is made of rubber. By scraping the inner wall of the inner liner with the plug body, the cleaning and discharging of the residual material are realized, so as to facilitate the next printing use.

[0019] 3. The 3D printing nozzle assembly. By setting a push rod. Specifically, the push rod can be a cylindrical structure or a rectangular rod. By pushing the push rod to drive the plug body to slide vertically, the cleaning of the inner liner is realized, which has the characteristic of facilitating the cleaning of the inner liner. At the same time, it is convenient for the reset of the plug body, and the limiting rod can limit the downward movement of the push rod, so that the plug body hovers at the top of the nozzle pipe, reducing the probability of the plug body blocking the opening of the feed pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 One of the overall three-dimensional views of the present utility model;

[0021] Figure 2 Another overall three-dimensional view of the present utility model;

[0022] Figure 3 Schematic diagram of the nozzle pipe installation inner liner assembly of the present utility model;

[0023] Figure 4 Three-dimensional view of the nozzle pipe of the present utility model;

[0024] Figure 5 Three-dimensional view of the inner liner, nozzle and plug body of the present utility model.

[0025] Legend: 10, mounting plate; 11, nozzle pipe; 12, feed pipe; 13, nozzle; 14, inner liner; 15, plug body; 16, push rod; 17, limiting ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] A 3D printing nozzle assembly, as Figure 1 and Figure 2 shown, includes:

[0027] The mounting plate 10, a plate-like structure for installation. Specifically, a first limiting screw is fixedly installed on one side of the mounting plate 10. A first mounting seat is also provided on one side of the mounting plate 10. The first mounting seat is provided with a rectangular groove. The first limiting screw passes through the rectangular groove. A nut is threadedly connected to the first limiting screw. The height of the first mounting seat is adjusted by tightening the nut. A second limiting screw is fixedly installed on one side of the first mounting seat. The second mounting seat is rotatably connected to the second limiting screw. Another nut is threadedly connected to the second limiting screw. The angle of the second mounting seat is locked by pressing the nut;

[0028] The nozzle 11 is fixedly arranged on one side of the mounting plate 10 for transporting raw materials. The nozzle 11 is fixedly installed on the second mounting seat through bolts, so that the installation height and angle of the nozzle 11 can be adjusted. A feed pipe 12 is fixedly installed on one side of the nozzle 11. The feed pipe 12 is used to connect with the feeding port of the printer, and raw materials are fed into the nozzle 11 through the feed pipe 12.

[0029] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the inner liner assembly is arranged in the cavity of the nozzle 11 for protecting the inner wall of the nozzle 11. The inner liner assembly includes a nozzle 13, a lining 14 and a plug 15. The lining 14 is embedded in the inner wall of the nozzle 11. The nozzle 13 is detachably connected to the nozzle 11. The nozzle 13 abuts against the lower end of the lining 14 and limits the lining 14 in the cavity of the nozzle 11. The plug 15 is slidably connected to the nozzle 11. The plug 15 can slide in the lining 14 to discharge residual materials. The nozzle 11 forms a cylindrical structure with an open lower end. The lining 14 forms a tubular structure. The outer diameter of the lining 14 is equal to the inner diameter of the nozzle 11. The lining 14 is as high as the cavity of the nozzle 11. An opening for avoiding the feed pipe 12 is arranged at the upper end of the lining 14. The opening is rectangular, and the width of the opening is equal to the diameter of the feed pipe 12. The nozzle 13 forms a funnel structure. The inside of the nozzle 13 is hollow. An integrally formed flange is arranged on the upper end surface of the nozzle 13. The flange is annular. Teeth are arranged on the inner wall of the flange. Tooth openings are arranged on the outer wall of the nozzle 11. The flange is threadedly connected to the outer wall of the nozzle 11. A limiting ring 17 is fixedly installed on the outer wall of the nozzle 11. The flange can abut against the bottom of the limiting ring 17. The plug 15 forms a circular plate structure. The diameter of the plug 15 is equal to the inner diameter of the lining 14. In this solution, by setting the detachable nozzle 13 and the lining 14, several linings 14 can be provided in a matching manner. Each lining 14 can be made of different materials, such as ceramic or metal materials. For different printing raw materials, the material of the lining 14 can be adjusted accordingly. For example, when using photosensitive resin, it is necessary to reduce the heat loss during the discharge of the resin from the nozzle 11. At this time, a ceramic lining 14 can be used to reduce the probability of solidification during printing. For some that need to be heated or cooled, such as paraffin, the lining 14 needs to have a certain heat conduction effect, and a metal lining 14 can be used to ensure the heating and cooling effects on the materials. The detachable nozzle 13 and the lining 14 can ensure production adaptability and use flexibility, are convenient to disassemble and assemble, and are also convenient for cleaning and maintenance.

[0030] By loosening the nozzle 13, the size of the flange of the nozzle 13 is fixed. There are multiple nozzles 13, and the sizes of the lower ports of the nozzles 13 can be set differently to adjust the discharge amount by replacing the nozzle 13. Loosen the nozzle 13, separate the nozzle 13 from the spray pipe 11, and then pull out the inner liner 14. Of course, the plug body 15 can also be pushed. The plug body 15 slides on the inner wall of the inner liner 14. The plug body 15 is made of rubber. The inner wall of the inner liner 14 is scraped and cleaned through the plug body 15 to realize the cleaning and discharging of the residual materials, so as to facilitate the next printing use.

[0031] As Figure 5 shown, the inner liner assembly further includes a push rod 16. The push rod 16 is fixedly connected to the plug body 15 and slidably connected to the spray pipe 11. A hole adapted to the push rod 16 is provided on the upper end surface of the spray pipe 11. The push rod 16 is slidably connected to the hole. Side holes are provided on the wall surface of the push rod 16, and a limiting rod is slidably connected in the side holes. When the plug body 15 abuts against the inner top surface of the spray pipe 11, the limiting rod abuts against the outer top surface of the spray pipe 11. As a supplementary description of the above solution, by setting the push rod 16, specifically, the push rod 16 can be a cylindrical structure or a rectangular rod. The inner liner 14 is cleaned by pushing the push rod 16 to drive the plug body 15 to slide vertically, which has the characteristic of facilitating the cleaning of the inner liner 14 and at the same time facilitating the reset of the plug body 15. The limiting rod can limit the downward movement of the push rod 16, so that the plug body 15 hovers at the top of the spray pipe 11, reducing the probability of the plug body 15 blocking the opening of the feed pipe 12 and ensuring the stability of feeding. The feed pipe 12 is inclined upward towards the spray pipe 11, and the port of the feed pipe 12 is close to the position of the inner top surface of the spray pipe 11.

[0032] The working principle of the present utility model: The size of the flange of the nozzle 13 is fixed. There are multiple nozzles 13, and the sizes of the lower ports of the nozzles 13 can be set differently to adjust the discharge amount by replacing the nozzle 13. Loosen the nozzle 13, separate the nozzle 13 from the spray pipe 11, and then pull out the inner liner 14. Of course, the plug body 15 can also be pushed. The plug body 15 slides on the inner wall of the inner liner 14. The plug body 15 is made of rubber. The inner wall of the inner liner 14 is scraped and cleaned through the plug body 15 to realize the cleaning and discharging of the residual materials. When replacing the inner liner 14, push the inner liner 14 into the cavity of the spray pipe 11 so that the notch of the inner liner 14 faces the feed pipe 12. The feed pipe 12 passes through the notch and extends into the cavity of the inner liner 14, and then tighten the nozzle 13 again.

[0033] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A 3D printing nozzle assembly, characterized in that: include: A mounting plate (10), a plate-like structure for mounting; A nozzle (11) is fixedly mounted on one side of the mounting plate (10) for conveying raw materials, and a feed pipe (12) is fixedly mounted on one side of the nozzle (11); An inner liner assembly is arranged in the cavity of a nozzle (11) for protecting the inner wall of the nozzle (11), the inner liner assembly comprising a nozzle (13), an inner liner (14) and a plug body (15), the inner liner (14) being embedded in the inner wall of the nozzle (11), the nozzle (13) being detachably connected to the nozzle (11), the nozzle (13) abutting against the lower end of the inner liner (14) and limiting the inner liner (14) in the cavity of the nozzle (11), the plug body (15) being slidably connected to the nozzle (11), and the plug body (15) being able to slide in the inner liner (14) to discharge residual materials.

2. The 3D printing nozzle assembly according to claim 1, characterized in that: The nozzle (11) forms a cylindrical structure with an opening at the lower end, and the inner liner (14) forms a tubular structure. The outer diameter of the inner liner (14) is equal to the inner diameter of the nozzle (11). The inner liner (14) and the nozzle (11) chamber are at the same height. A notch is provided at the upper end of the inner liner (14) for avoiding the feed pipe (12). The notch is rectangular, and the width of the notch is equal to the diameter of the feed pipe (12).

3. The 3D printing nozzle assembly according to claim 2, characterized in that: The nozzle (13) forms a funnel structure. The interior of the nozzle (13) is hollow. The upper end surface of the nozzle (13) is provided with an integrally formed rib. The rib is annular. The inner wall of the rib is provided with teeth. The outer wall of the nozzle pipe (11) is provided with a tooth opening. The rib is threadedly connected to the outer wall of the nozzle pipe (11).

4. The 3D printing nozzle assembly according to claim 3, characterized in that: A limiting ring (17) is fixedly mounted on the outer wall of the nozzle (11), and the retaining edge can abut against the bottom of the limiting ring (17).

5. The 3D printing nozzle assembly according to claim 1, characterized in that: The plug body (15) is formed into a circular plate structure, and the diameter of the plug body (15) is equal to the inner diameter of the liner (14).

6. The 3D printing nozzle assembly according to claim 1, characterized in that: The inner container assembly also includes a push rod (16), which is fixedly connected to the plug body (15) and slidably connected to the nozzle (11).

7. The 3D printing nozzle assembly according to claim 6, characterized in that: The upper end surface of the nozzle (11) is provided with a hole adapted to fit the push rod (16), the push rod (16) is slidably connected to the hole, a side hole is provided on the wall surface of the push rod (16), a limit rod is slidably connected in the side hole, and when the plug body (15) contacts the inner top surface of the nozzle (11), the limit rod contacts the outer top surface of the nozzle (11).

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