A 3D printer print head

Abstract

The present invention relates to the field of 3D printing technology, specifically a 3D printer print head, in which an operator pushes and pulls a handle to cause a screw to extend into or be pulled out from a main body. Since a screw thread is provided on the nut and a push plate and the screw are connected by a rotating shaft, when the handle is pushed and pulled, a cleaning member at the bottom of the screw is driven to move up and down inside the main body, effectively cleaning the inner wall of the main body. The cleaning member also rotates synchronously with the screw when moving up and down, further ensuring the cleaning effect of the cleaning member on the inner wall of the main body. A partition device is provided on the side of the main body, and the housing of the partition device is installed at an opening on the side of the main body. The threaded rod is driven to rotate by a motor, and the threaded rod is connected to a moving block by a thread, so that the moving block can push the partition plate to move into the main body, thereby realizing a partition inside the main body, ensuring that the medium is ejected from the nozzle after entering the main body, avoiding contact between the medium and the cleaning member, and ensuring the subsequent cleaning effect of the cleaning member.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printer print head. Background Art

[0002] 3D printing is a type of rapid prototyping technology. It is usually achieved by using digital technology material printers. It is often used to make models in the fields of mold manufacturing, industrial design, etc., and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology. This technology has been used in jewelry, footwear, industrial design, architecture, engineering and construction, automobiles, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms and other fields.

[0003] A Chinese patent with authorization announcement number CN114986891B discloses an anti-color mixing 3D print head, comprising a main body, several groups of heat sinks installed on the outer side of the main body, a cleaning mechanism provided at the upper end of the main body, a connecting pipe installed at the bottom end of the main body, a nozzle provided below the connecting pipe, a connecting mechanism provided between the nozzle and the connecting pipe, the cleaning mechanism comprising an annular plate 1 fixedly mounted on the outer side of the main body near the upper end, an outer shell 1 provided on the upper end surface of the annular plate 1, an outer shell 2 provided on the upper end surface of the annular plate 1 near one side, a card slot provided on the upper end surface of the annular plate 1, a card plate provided inside the card slot, and screw 2 inserted on the upper end surface of the card plate; the present invention can well clean the inner side wall of the main body by setting a cleaning mechanism, effectively prevent color mixing, and facilitate the staff to replace the nozzle damaged by long-term use.

[0004] However, during normal use of the above patent, since the medium required for printing needs to pass through the inside of the main body and then be ejected from the nozzle, the medium will affect the curved sponge plate when passing through the inside of the main body, making it impossible for the curved sponge ring to effectively clean the inner wall of the main body, and the replacement of the curved sponge plate requires stopping the printing work, which affects the normal printing efficiency. In addition, during the printing work, the medium will adhere to the inner wall of the main body, and the effect of cleaning the medium adhesion by the curved sponge plate straight up and down is poor. Summary of the Invention

[0005] An object of the embodiments of the present invention is to provide a 3D printer print head to solve the problems existing in the above-mentioned background technology.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A 3D printer print head, comprising a main body, a feed pipe connected to the main body is provided on the side of the main body, a nozzle is provided at the lower end of the main body, a cleaning device is provided on the top of the main body, a partition device is provided on the side of the main body, and the horizontal height of the partition device is higher than the horizontal height of the top of the feed pipe; the cleaning device comprises a nut, the top of the main body has a thread adapted to the nut, the middle of the nut is provided with a screw, a screw is provided through the screw, the top of the screw is provided with a push plate installed through a rotating shaft, the top of the push plate is provided with a handle, and the bottom of the screw is detachably provided with a cleaning piece; the partition device comprises a shell, an opening is provided on the side of the main body, a shell is installed at the opening, a partition that can partition the inside of the main body is slidably provided inside the shell, a moving block is provided at one end of the partition away from the main body, the moving block has a threaded hole, and a motor is provided at one end of the shell away from the main body, a threaded rod facing the main body is installed at the power output end of the motor, and the threaded rod cooperates with the threaded hole on the moving block.

[0008] Preferably, a plurality of groups of temperature control fins are arranged at intervals on the main body.

[0009] Preferably, a first one-way valve is provided on the push plate, a second one-way valve is provided on the nut, a folding air hood is provided between the nut and the push plate, and the two ends of the folding air hood are respectively connected to the top of the nut and the bottom of the push plate.

[0010] Preferably, the end of the partition close to the main body is arc-shaped and adapted to the inner wall of the main body, and an annular groove is provided on the inner wall of the main body that contacts the arc-shaped end of the partition.

[0011] Preferably, the side wall of the main body at the upper end of the opening is provided with an arc-shaped groove, and a baffle plate is installed in the arc-shaped groove toward the lower end of the opening. The upper side of the arc-shaped groove and the upper end of the baffle plate form a sealed compressed air cavity, and the side of the main body is provided with an inflation valve connected to the compressed air cavity.

[0012] Preferably, the lower end of the shielding plate close to the partition is provided with an oblique angle, and the upper side of the partition close to the main body is provided with an oblique angle.

[0013] Preferably, the nozzle is connected to the lower end of the main body via a thread, and the shell is detachably mounted at an opening on the side of the main body.

[0014] Preferably, the cleaning member comprises a rotating block mounted at the bottom of the screw, and the rotating block is provided with bristles capable of abutting against the inner wall of the main body.

[0015] Preferably, the cleaning member comprises a rotating block mounted at the bottom of the screw, and the rotating block is provided with a sponge ring capable of abutting against the inner wall of the main body.

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

[0017] 1. This device allows the operator to push and pull the handle to extend the screw into or pull it out of the main body. Since the nut is provided with a screw hole and the push plate and the screw are connected by a rotating shaft, when the handle is pushed and pulled, the cleaning piece at the bottom of the screw will be driven to move up and down inside the main body, effectively cleaning the inner wall of the main body. The cleaning piece will also rotate synchronously with the screw when moving up and down, further ensuring the cleaning effect of the cleaning piece on the inner wall of the main body.

[0018] 2. This device is provided with a partition device on the side of the main body. The shell of the partition device is installed at the opening on the side of the main body. The threaded rod is driven to rotate by the motor. The threaded rod is connected to the moving block by a thread. Therefore, the moving block can push the partition to move toward the inside of the main body, thereby realizing the partition inside the main body, ensuring that the medium is sprayed out from the nozzle after entering the inside of the main body, avoiding contact between the medium and the cleaning part, and ensuring the subsequent cleaning effect of the cleaning part.

[0019] 3. The temperature-controlled fins of this device can not only dissipate heat from the main body, but also heat the main body when cleaning the inside of the main body; when printing is in progress, the temperature inside the main body can be dissipated through the temperature-controlled fins to prevent the temperature inside the main body from being too high. Under high temperature, the main body and nozzle may undergo slight deformation, affecting the printing accuracy. Cooling helps to maintain the shape and dimensional stability of the main body and nozzle; after the printing work is completed, the temperature is prevented from dropping, causing the printing medium to harden and adhere to the inner wall of the main body. The temperature-controlled fins can heat the main body, making the printing material remaining inside the print head soft or partially melted, making it easier to be removed by the cleaning parts, ensuring the cleaning effect.

[0020] 4. This device is provided with a folding air hood, a first one-way valve and a second one-way valve. When the push plate is pushed toward the nut by the handle, it ensures that the cleaning member effectively cleans the inner wall of the main body. At the same time, the gas inside the folding air hood can be pressed into the interior of the main body through the second one-way valve, blowing the cleaned medium to ensure that the medium is ejected from the nozzle, further improving the cleaning effect.

[0021] 5. The compressed air cavity of the device is filled with compressed gas to ensure that the baffle is always facing the partition, and the partition is always moving along the bottom side of the shell cavity. A certain pressure is applied to the partition so that when the partition moves toward the inside of the shell, the medium adhering to the bottom of the partition can be effectively scraped off by the side wall of the main body opening, thereby ensuring the sealing of the partition and preventing the medium inside the main body from entering the shell.

[0022] 6. The rotating block of this device is detachably installed at the bottom of the screw. Dense bristles are arranged on the circumference of the rotating block, and the bristles can abut against the inner wall of the main body. When the screw drives the rotating block to descend and rotate, it can ensure that the inner wall of the main body is effectively cleaned by the bristles. At the same time, the gaps between the bristles can ensure that the gas in the folded air hood passes through, making it convenient to blow the cleaned medium out of the inside of the main body.

[0023] 7. This device is achieved by detachably mounting a rotating block at the bottom of the screw. A sponge ring is provided on the rotating block, and the sponge ring can completely abut against the inner wall of the main body. When the screw drives the rotating block to descend and rotate, the sponge ring can more fully abut against the inner wall of the main body relative to the bristles, thereby ensuring that the inner wall of the main body is effectively cleaned by the sponge ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the front view of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 The cross-sectional view of the present invention Figure 1 ;

[0027] Figure 4 The cross-sectional view of the present invention Figure 2 ;

[0028] Figure 5 for Figure 4 Schematic diagram of the local structure;

[0029] Figure 6 This is a cross-sectional view of the present invention after the sponge ring is replaced.

[0030] In the figure: 1. Main body; 2. Feed pipe; 3. Temperature control fin; 4. Nut; 5. Folding air hood; 6. Handle; 7. First one-way valve; 8. Second one-way valve; 9. Push plate; 10. Screw; 11. Screw mouth; 12. Rotating block; 13. Bristles; 14. Sponge ring; 15. Compressed air chamber; 16. Inflating valve; 17. Partition; 18. Shell; 19. Shielding plate; 20. Motor; 21. Threaded rod; 22. Moving block; 23. Nozzle. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] A 3D printer print head, such as Figure 1-Figure 5 As shown, it includes a main body 1, a feed pipe 2 connected to the main body 1 is provided on the side of the main body 1, a nozzle 23 is provided at the lower end of the main body 1, a cleaning device is provided on the top of the main body 1, and a partition device is provided on the side of the main body 1. The horizontal height of the partition device is higher than the horizontal height of the top of the feed pipe 2; the cleaning device includes a nut 4, the top of the main body 1 has a thread adapted to the nut 4, the middle of the nut 4 is provided with a screw mouth 11, a screw 10 is provided through the screw mouth 11, the top of the screw 10 is installed with a push plate 9 through a rotating shaft, and the top of the push plate 9 is provided with The handle 6 and the bottom of the screw 10 are detachably provided with a cleaning piece; the partition device includes a shell 18, an opening is provided on the side of the main body 1, and the shell 18 is installed at the opening. A partition 17 capable of partitioning the inside of the main body 1 is slidingly provided inside the shell 18, and a moving block 22 is provided at the end of the partition 17 away from the main body 1, and the moving block 22 has a threaded hole. A motor 20 is provided at the end of the shell 18 away from the main body 1, and a threaded rod 21 facing the main body 1 is installed at the power output end of the motor 20, and the threaded rod 21 cooperates with the threaded hole on the moving block 22.

[0034] The medium required for printing enters the main body 1 through the feed tube 2 and is then ejected from the nozzle 23 at the bottom of the main body 1 to perform 3D printing. If there is medium adhering to the main body 1, the nozzle 23 may be clogged or the material may be discharged unevenly, resulting in uneven printing layers and affecting the surface quality and accuracy of the printed part.

[0035] By arranging a cleaning device on the top of the main body 1, the operator pushes and pulls the handle 6 to extend the screw 10 into the main body 1 or pull it out from the main body 1. Since the nut 4 is provided with a screw hole 11 and the push plate 9 and the screw 10 are connected by a rotating shaft, when the handle 6 is pushed and pulled, the cleaning piece at the bottom of the screw 10 will be driven to move up and down inside the main body 1, effectively cleaning the inner wall of the main body 1. The cleaning piece will also rotate synchronously with the screw 10 when moving up and down, further ensuring the cleaning effect of the cleaning piece on the inner wall of the main body 1;

[0036] In order to prevent the media required for printing from entering the upper end of the main body 1 and contacting the cleaning part during the printing process, so that the cleaning part cannot effectively perform the subsequent cleaning work, or the subsequent cleaning work effect becomes worse, a partition device is provided on the side of the main body 1, and the shell 18 of the partition device is installed at the opening on the side of the main body 1. The threaded rod 21 is driven to rotate by the motor 20, and the threaded rod 21 is connected to the moving block 22 by a thread, so that the moving block 22 can push the partition 17 to move toward the inside of the main body 1, thereby realizing the partition of the inside of the main body 1, ensuring that the medium is sprayed out from the nozzle 23 after entering the inside of the main body 1, avoiding the medium from contacting the cleaning part, and ensuring the subsequent cleaning effect of the cleaning part.

[0037] When the cleaning device is working, the partition 17 is driven by the motor 20 to retract inside the shell 18, and the interior of the main body 1 is in a through state, so as to prevent the partition 17 from being inside the main body 1, causing the cleaning device to be unable to perform normal cleaning work.

[0038] A plurality of groups of temperature control fins 3 are arranged at intervals on the main body 1 .

[0039] The temperature control fins 3 can not only dissipate heat for the main body 1, but also heat the main body 1 when cleaning the inside of the main body 1; when the printing work is carried out normally, the temperature inside the main body 1 can be discharged through the temperature control fins 3 to avoid the temperature inside the main body 1 being too high. Under high temperature, the main body 1 and the nozzle 23 may undergo slight deformation, affecting the printing accuracy. Cooling helps to maintain the shape and dimensional stability of the main body 1 and the nozzle 23; after the printing work is completed, the temperature is prevented from dropping, causing the printing medium to harden and adhere to the inner wall of the main body 1. The temperature control fins 3 can heat the main body 1, so that the printing material remaining inside the print head becomes soft or partially melted, making it easier to be removed by the cleaning parts, ensuring the cleaning effect.

[0040] A first one-way valve 7 is provided on the push plate 9, a second one-way valve 8 is provided on the nut 4, a folding air hood 5 is provided between the nut 4 and the push plate 9, and the two ends of the folding air hood 5 are respectively connected to the top of the nut 4 and the bottom of the push plate 9.

[0041] By setting up a foldable air hood 5, when the push plate 9 is pushed toward the nut 4 by the handle 6, the cleaning part effectively cleans the inner wall of the main body 1. At the same time, the gas inside the foldable air hood 5 can be pressed into the main body 1 through the second one-way valve 8, and the cleaned medium is blown to ensure that the medium is sprayed out from the nozzle 23, further improving the cleaning effect. When the push plate 9 is pushed toward the nut 4, the first one-way valve 7 is in a closed state and the second one-way valve 8 is in an open state, effectively ensuring that the gas enters the main body 1. When the push plate 9 is pulled away from the nut 4, the first one-way valve 7 is opened and the second one-way valve 8 is closed, and new gas enters the foldable air hood 5, which is convenient for the subsequent continued entry into the main body 1. In this process, the foldable air hood 5 can effectively ensure that it is compressed and stretched due to its folding function.

[0042] The end of the partition 17 close to the main body 1 is arc-shaped and adapted to the inner wall of the main body 1 , and an annular groove is provided on the inner wall of the main body 1 that contacts the arc-shaped end of the partition 17 .

[0043] The end of the partition 17 adapted to the inner wall of the main body 1 can effectively ensure that the partition 17 is in contact with the inner wall of the entire main body 1 to ensure sealing. At the same time, the annular groove provided can ensure that the partition 17 has an arc-shaped end insertion, which not only improves the sealing, but also ensures the stability of the partition 17 when it is in the partition state, avoids excessive medium pressure, and causes deformation of the partition 17, thereby increasing the service life of the device.

[0044] An arc-shaped groove is provided on the side wall of the main body 1 at the upper end of the opening, and a baffle 19 is installed in the arc-shaped groove toward the lower end of the opening. The upper side of the arc-shaped groove and the upper end of the baffle 19 form a sealed compressed air cavity 15, and an inflation valve 16 communicating with the compressed air cavity 15 is provided on the side of the main body 1.

[0045] Compressed gas is filled into the compressed air chamber 15 to ensure that the baffle 19 is always facing the partition 17, and that the partition 17 always moves along the bottom side of the inner cavity of the shell 18. A certain pressure is applied to the partition 17 so that when the partition 17 moves toward the inside of the shell 18, the medium adhered to the bottom of the partition 17 can be effectively scraped off by the side wall of the opening of the main body 1, thereby ensuring the sealing of the partition 17 and preventing the medium inside the main body 1 from entering the inside of the shell 18.

[0046] The lower end of the shielding plate 19 close to the partition 17 is provided with an oblique angle, and the upper side of the partition 17 close to the main body 1 is provided with an oblique angle.

[0047] In order to ensure that the partition 17 can effectively push open the baffle 19 when it moves into the main body 1, an oblique angle is set on the baffle 19 and the partition 17 to effectively improve the passability of the partition 17, thereby preventing the partition 17 from damaging the baffle 19 when it moves into the main body 1, thereby ensuring the service life of the device.

[0048] The nozzle 23 is connected to the lower end of the main body 1 through a thread, and the shell 18 is detachably mounted at an opening on the side of the main body 1 .

[0049] Since the nozzle 23 is conical, the cleaning part of the device can avoid being unable to effectively clean the nozzle 23, causing the nozzle 23 to be blocked or damaged. The threaded connection allows the nozzle 23 to be quickly disassembled for replacement or repair, ensuring printing efficiency.

[0050] The cleaning member includes a rotating block 12 installed at the bottom of the screw 10 , and the rotating block 12 has bristles 13 that can abut against the inner wall of the main body 1 .

[0051] The rotating block 12 is detachably mounted at the bottom of the screw 10. Dense bristles 13 are arranged around the rotating block 12, and the bristles 13 can abut against the inner wall of the main body 1. When the screw 10 drives the rotating block 12 to descend and rotate, the inner wall of the main body 1 can be effectively cleaned by the bristles 13. At the same time, the gaps between the bristles 13 can ensure that the gas in the folding air hood 5 passes through, making it convenient to blow the cleaned medium out of the inside of the main body 1.

[0052] Example 2

[0053] like Figure 6 The difference between this embodiment and the first embodiment is that the cleaning member includes a rotating block 12 installed at the bottom of the screw 10 , and the rotating block 12 has a sponge ring 14 that can abut against the inner wall of the main body 1 .

[0054] When it is necessary to clean the color attached to the inner wall of the main body 1, the cleaning effect of the bristles 13 becomes poor. By detachably mounting the rotating block 12 on the bottom of the screw 10, a sponge ring 14 is provided on the rotating block 12, and the sponge ring 14 can completely abut against the inner wall of the main body 1. When the screw 10 drives the rotating block 12 to descend and rotate, the sponge ring 14 can more fully abut against the inner wall of the main body 1 relative to the bristles 13, thereby ensuring that the inner wall of the main body 1 is effectively cleaned by the sponge ring 14.

[0055] Due to the provision of the partition 17, when the cleaning part of the baffle device needs to be replaced or repaired, it only takes a short time to remove the nut 4 from the screw mouth 11, and the cleaning device can be operated alone, without affecting the normal operation of the printing work, thereby ensuring printing efficiency.

[0056] By detachably installing the rotating block 12, it is convenient to replace the rotating block 12 with bristles 13 or the rotating block 12 with a sponge ring 14 according to actual needs, thereby improving the practicality of the device. Similarly, the detachable installation method also makes it easy to replace a damaged or dirty rotating block 12 without affecting the printing efficiency.

[0057] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A 3D printer print head, comprising a main body (1), a feed pipe (2) connected to the main body (1) is provided on the side of the main body (1), and a nozzle (23) is provided at the lower end of the main body (1), characterized in that: A cleaning device is provided on the top of the main body (1), and a partition device is provided on the side of the main body (1), wherein the horizontal height of the partition device is higher than the horizontal height of the top of the feed pipe (2); The cleaning device comprises a nut (4), the top of the main body (1) has a thread adapted to the nut (4), the middle of the nut (4) is provided with a screw hole (11), a screw rod (10) is provided through the screw hole (11), a push plate (9) is installed on the top of the screw rod (10) through a rotating shaft, a handle (6) is provided on the top of the push plate (9), and a cleaning piece is detachably provided on the bottom of the screw rod (10); The partition device comprises a shell (18), an opening is provided on the side of the main body (1), the shell (18) is installed at the opening, a partition (17) is slidably provided inside the shell (18) and can partition the inside of the main body (1), a moving block (22) is provided at one end of the partition (17) away from the main body (1), the moving block (22) has a threaded hole, a motor (20) is provided at one end of the shell (18) away from the main body (1), a threaded rod (21) facing the main body (1) is installed at the power output end of the motor (20), and the threaded rod (21) is matched with the threaded hole on the moving block (22); The push plate (9) is provided with a first one-way valve (7), the nut (4) is provided with a second one-way valve (8), a folding air hood (5) is provided between the nut (4) and the push plate (9), and the two ends of the folding air hood (5) are respectively connected to the top of the nut (4) and the bottom of the push plate (9).

2. A 3D printer print head according to claim 1, characterized in that: Multiple groups of temperature control fins (3) are arranged at intervals on the main body (1).

3. A 3D printer print head according to claim 2, characterized in that: The end of the partition (17) close to the main body (1) is in an arc shape adapted to the inner wall of the main body (1), and an annular groove is provided on the inner wall of the main body (1) in contact with the end of the partition (17) having the arc shape.

4. A 3D printer print head according to claim 3, characterized in that: The side wall of the main body (1) at the upper end of the opening is provided with an arc-shaped groove, a shielding plate (19) facing the lower end of the opening is installed in the arc-shaped groove, the upper side of the arc-shaped groove and the upper end of the shielding plate (19) form a sealed compressed air cavity (15), and the side of the main body (1) is provided with an inflation valve (16) communicating with the compressed air cavity (15).

5. A 3D printer print head according to claim 4, characterized in that: The lower end of the shielding plate (19) close to the partition (17) is provided with an oblique angle, and the upper side of the partition (17) close to the end of the main body (1) is provided with an oblique angle.

6. A 3D printer print head according to claim 5, characterized in that: The nozzle (23) is connected to the lower end of the main body (1) via a thread, and the housing (18) is detachably mounted at an opening on the side of the main body (1).

7. A 3D printer print head according to claim 1, characterized in that: The cleaning piece comprises a rotating block (12) mounted on the bottom of the screw (10); the rotating block (12) is provided with bristles (13) capable of abutting against the inner wall of the main body (1).

8. A 3D printer print head according to claim 1, characterized in that: The cleaning piece comprises a rotating block (12) mounted on the bottom of the screw (10); the rotating block (12) is provided with a sponge ring (14) capable of abutting against the inner wall of the main body (1).

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