A 3D printing head and a 3D printer

Abstract

The present invention relates to the technical field of 3D printers, and specifically relates to a 3D print head and a 3D printer, including a housing, a mounting box fixedly connected to the top of the housing, a first cylinder fixedly connected to the center of the inner wall of the bottom of the housing, and a first support rod fixedly connected to the output end of the first cylinder. For the 3D print head and the 3D printer of the present invention, by turning on the first motor, the first motor drives the mounting plate to translate through the threaded rod. During the translation of the mounting plate, the surface of the placement table is cleaned by the scraper and the cleaning brush. When the mounting plate moves to one end close to the extrusion block, the waste is scraped to the bottom of the housing through the movement of the mounting plate, and the elastic airbag is driven by the movement and extrusion of the mounting plate, so that the mounting plate blows the waste residue on the inner wall of the bottom of the housing into the waste bin through the air outlet pipe. Compared with the existing manual cleaning, it saves time and effort, and also avoids the accumulation of waste residue inside the housing.

Description

Technical Field

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

[0002] A 3D printer is a technology that constructs an object by layer-by-layer printing using powdered metal, plastic, or other bondable materials based on a digital model file. 3D printing is usually achieved using a digital technology material printer. It is often used to manufacture models in fields such as mold manufacturing and industrial design, and has gradually been used for the direct manufacturing of some products. There are already parts printed using this technology. This technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

[0003] A 3D printer, also known as a three-dimensional printer, is a cumulative manufacturing technology that manufactures three-dimensional objects by printing layers of bondable materials. At present, three-dimensional printers are used to manufacture samples;

[0004] After the existing 3D printer finishes printing, some plastic residues will adhere to the carrier table after the model is formed. The plastic residues will affect the flatness of the printing table, thereby affecting the quality of the next printing. Therefore, it is necessary to clean the plastic residues. Some of the existing printers are cleaned manually, and some of the waste materials after cleaning will remain inside the printing table, making the cleaning work more difficult.

[0005] Therefore, a 3D print head and a 3D printer are proposed. Summary of the Invention

[0006] The object of the present invention is to provide a 3D printing head and a 3D printer. By turning on the first motor, the first motor drives the mounting plate to translate through a threaded rod. During the translation of the mounting plate, the surface of the placement table is cleaned by a scraper and a cleaning brush. When the mounting plate moves to one end close to the extrusion block, the waste is scraped to the bottom of the housing through the movement of the mounting plate, and the elastic airbag is driven by the movement of the mounting plate to squeeze, so that the mounting plate blows the waste residue on the inner wall of the bottom of the housing into the waste bin through the air outlet pipe. Compared with the existing manual cleaning, it saves time and effort, and also avoids the accumulation of waste residue inside the housing; by operating the controller to drive the second spring to contract, it is convenient to open the engagement of the positioning rod with the positioning block, so as to facilitate the staff to take out the placement table. Compared with the existing integrated workbench, the operator can judge whether to take out the placement table according to the size of the printed object, which is convenient for the operator to take out large printed objects; when adding raw materials, the second cylinder is turned on, so that the second cylinder drives the threaded feeding rod to move inside the discharge pipe through the second connecting rod, so that the raw materials inside the discharge pipe can be scraped by the push plate. Compared with the existing direct transportation through the threaded feeding rod, the situation of raw materials burning and charring inside the discharge pipe can be reduced, so as to ensure the quality of the transported raw materials.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A 3D printer, comprising a housing, an installation box fixedly connected to the top of the housing, a first cylinder fixedly connected to the center of the inner wall of the bottom of the housing, and a first support rod fixedly connected to the output end of the first cylinder. An installation table is fixedly connected to the top of the first support rod, a placement table is slidably connected to the top of the installation table, a waste slot is opened at one end of the housing, a controller is fixedly connected to the outer wall of the housing, a discharge port is opened at one end of the housing, a first motor is fixedly connected to one end of the housing, a threaded rod is fixedly connected to the output end of the first motor, the other end of the threaded rod is rotatably connected to the inner wall of the housing, an installation block is fixedly connected to the inner wall of the housing, an installation plate is sleeved on the outer wall of the threaded rod, internal threads adapted to the threaded rod are provided on the inner wall of the installation plate, a second support rod is fixedly connected to the inner wall of the housing, the other end of the installation plate is slidably connected to the second support rod, scraping plates are symmetrically and fixedly connected to the bottom of the installation plate, a cleaning brush is fixedly connected to the bottom of the installation plate, a plurality of elastic air bags are symmetrically and fixedly connected to one end of the installation block close to the installation plate, an extrusion block is fixedly connected to the other ends of the plurality of elastic air bags, a first spring is sleeved on the outer wall of the elastic air bag, one end of the first spring is fixedly connected to the installation block, the other end of the first spring is fixedly connected to the extrusion block, an air inlet pipe is fixedly connected to one end of the elastic air bag close to the installation block, the air inlet pipe is communicated with the elastic air bag, the air inlet pipe penetrates through the installation block, the other end of the air inlet pipe penetrates through the housing, an air outlet pipe is fixedly connected to one end of the elastic air bag, the air outlet pipe penetrates through the installation block, a feeding hose is fixedly connected to the inner wall of the installation box, a discharging device is fixedly connected to the bottom of the feeding hose, and a printing head is fixedly connected to the bottom of the discharging device.

[0009] Before printing, first control the first motor to drive the threaded rod to rotate, so that the threaded rod drives the mounting plate to move to the right, and then start printing the item. When the item is being printed, control the first support rod to descend uniformly through the first cylinder. When the item is printed, drive the first support rod to move upward through the first cylinder, so that the placement table returns to its original position. Then, control the first motor to drive the threaded rod to rotate reversely, so that the threaded rod drives the mounting plate to move to the left. During the movement of the mounting plate, the residue on the top of the placement table is cleaned by the scraper and cleaning brush at the bottom. During the movement of the mounting plate to the left, the residue is swept to the inner wall on the left side of the housing. At this time, the threaded rod drives the mounting plate to continue moving to the left. During the movement, the mounting plate squeezes the extrusion block, and at this time, the extrusion block squeezes the elastic airbag and the first spring. The elastic airbag sprays the internal gas through the air outlet pipe, so that the waste at the bottom inner wall on the left side of the housing is blown into the waste box through the waste slot, thus completing the cleaning of the waste. When the waste cleaning is completed, control the mounting plate to move to the far right through the first motor. At this time, the first spring and the elastic airbag are no longer stressed, and at the same time, the first spring starts to rebound. During the rebound process, the first spring drives the elastic airbag to reset. At this time, the elastic airbag intakes air through the air inlet pipe to inflate, so as to facilitate the next cleaning of the waste.

[0010] Preferably, a one-way intake valve is fixedly installed on the outer wall of the air inlet pipe, a pressure valve is fixedly installed on the outer wall of the air outlet pipe, and the bottom of the air outlet pipe faces the waste slot.

[0011] The one-way intake valve enables the gas to enter from the air inlet pipe and prevents the gas from spraying out of the air inlet pipe when the elastic airbag sprays gas, so that the gas inside the elastic airbag can be concentrated and sprayed out from the air outlet pipe, thus ensuring the flow rate and flow volume of the gas. The pressure valve enables the gas to spray out from the air outlet pipe after reaching a certain pressure, so as to facilitate the cleaning of the waste.

[0012] Preferably, multiple elastic airbags are at the same horizontal height as the mounting plate.

[0013] Multiple elastic airbags are used to clean the waste at the bottom of the housing simultaneously, so as to prevent the waste from accumulating.

[0014] Preferably, connection blocks are symmetrically and fixedly connected to both ends of the mounting table, limiting rods are symmetrically and fixedly connected to the inner wall of the housing, the connection blocks are sleeved on the outer wall of the limiting rods, and the limiting rods are slidably connected to the connection blocks.

[0015] The sliding connection between the connection blocks by the limiting rods increases the stability when the mounting table and the placement table move up and down, which is beneficial to the processing and forming of the item.

[0016] Preferably, an installation groove is formed in the inner wall of the installation table, a sleeve is fixedly connected to the inner wall of the installation groove, a second spring is fixedly connected to the inner wall of the sleeve, a positioning rod is slidably connected to the inner wall of the sleeve, the other end of the second spring is fixedly connected to the bottom of the positioning rod, one end of the placement table is fixedly connected to a positioning block, a positioning groove is formed in the positioning block, and the positioning rod is engaged with the positioning groove.

[0017] After a larger item is processed and formed, the operator first energizes the second spring through the controller. At this time, the second spring contracts and drives the positioning rod to be withdrawn from the positioning groove inside the positioning block. At this time, the operator can pull one end of the installation table from the discharge port to take out the installation table, and then take out the printed item on the top of the installation table. Then, place the positioning block back on the top of the installation table. At this time, stop energizing the second spring. At this time, the second spring rebounds and drives the positioning rod to engage with the positioning block again, thus completing the taking of the material.

[0018] Preferably, the outer wall dimension of the positioning rod is adapted to the inner wall dimension of the positioning groove, and the controller is electrically connected to the second spring.

[0019] By making the outer wall dimension of the positioning rod adapted to the inner wall dimension of the positioning groove, the stability of the connection between the positioning rod and the positioning groove can be ensured.

[0020] Preferably, a discharge pipe is fixedly connected to the inner wall of the installation box, a feeding pipe is fixedly connected to the top of the discharge pipe, heaters are fixedly connected to the outer wall of the discharge pipe at equal intervals, a threaded feeding rod is slidably connected to the inside of the discharge pipe, a second motor is fixedly connected to the inside of the installation box, a first connecting rod is fixedly connected to the output end of the second motor, one end of the threaded feeding rod is sleeved on the outer wall of the first connecting rod, a connecting ring is rotatably connected to the outer wall of one end of the threaded feeding rod, a second cylinder is fixedly connected to the inside of the installation box, a second connecting rod is fixedly connected to the output end of the second cylinder, push plates are fixedly connected to the outer wall of the threaded feeding rod at equal intervals, one end of the discharge pipe is fixedly connected to a feeding hose, and the feeding hose is communicated with the discharge pipe.

[0021] When adding raw materials, turn on the heaters. While putting the raw materials into the feeding pipe, turn on the second motor at the same time. At this time, the second motor drives the first connecting rod and the threaded feeding rod to convey the materials through rotation. At the same time, the heaters heat the raw materials. In order to prevent the remaining raw materials from being overheated and charred last time, turn on the second cylinder at this time to drive the second connecting rod to move reciprocally, so that the second connecting rod drives the connecting ring and the threaded feeding rod to move, so that the threaded feeding rod drives the push plates to clean the inner wall of the discharge pipe during the reciprocating movement, so as to fully mix it with the newly added raw materials, thus preventing overheating. As the threaded feeding rod rotates, the liquid raw materials enter the inside of the feeding hose, which is convenient for the discharging device to print through the print head.

[0022] Preferably, the heater is in a ring shape.

[0023] The ring-shaped heater can uniformly heat the inside of the discharge pipe, thereby ensuring uniform heating of the raw materials.

[0024] Preferably, a waste box is snap-fitted to one end of the housing, and the opening of the waste box communicates with the waste chute.

[0025] The waste box facilitates the recycling of waste, thus facilitating centralized cleaning by the operator.

[0026] A 3D printing head includes a discharging device. Inside the housing, first guide rails are symmetrically and fixedly connected. The inner wall of the discharging device is slidably connected with a third support rod. Both ends of the third support rod are fixedly connected with first sliders. The third support rod is slidably connected with the first guide rails through the first sliders. Inside the housing, second guide rails are symmetrically and fixedly connected. The inner wall of the discharging device is slidably connected with a fourth support rod. Both ends of the fourth support rod are fixedly connected with second sliders. The fourth support rod is slidably connected with the second guide rails through the second sliders. The controller is electrically connected to the first guide rails and the controller is electrically connected to the second guide rails. The material of the printing head is aluminum alloy.

[0027] By controlling the first guide rails and the second guide rails through the controller, the first guide rails and the second guide rails are very mature in the prior art, usually called X, Y, Z-axis movement modules. Then, through the set parameters, the controller drives the first guide rails and the second guide rails respectively, and makes the first guide rails and the second guide rails drive the first sliders and the second sliders respectively. Furthermore, the first sliders and the second sliders drive the third support rod and the fourth support rod, so as to drive the discharging device to move back and forth and left and right, thus facilitating driving the printing head to spray materials.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. For the 3D printing head and 3D printer of the present invention, by turning on the first motor, the first motor drives the mounting plate to translate through the threaded rod. During the translation of the mounting plate, the surface of the placement table is cleaned by the scraper and the cleaning brush. When the mounting plate moves to one end close to the extrusion block, the waste is scraped to the bottom of the housing through the movement of the mounting plate, and the elastic airbag is driven by the movement of the mounting plate to squeeze. Thus, the mounting plate blows the waste residue on the inner wall of the bottom of the housing into the waste box through the air outlet pipe. Compared with the existing manual cleaning, it saves time and effort, and also avoids the accumulation of waste residue inside the housing.

[0030] 2. In the 3D printing head and 3D printer of the present invention, the operation controller drives the second spring to contract, so as to facilitate opening the engagement of the positioning rod with the positioning block, thereby facilitating the staff to take out the placement table. Compared with the existing integrated workbench, the operator can independently judge whether to take out the placement table according to the size of the printed object, which is convenient for the operator to take out large printed objects.

[0031] 3. In the 3D printing head and 3D printer of the present invention, when adding raw materials, the second cylinder is opened, so that the second cylinder drives the threaded feeding rod to move inside the discharge pipe through the second connecting rod, thereby enabling the raw materials inside the discharge pipe to be scraped by the push plate. Compared with the existing direct feeding through the threaded feeding rod, the situation of raw materials being scorched inside the discharge pipe can be reduced, thus ensuring the quality of the transported raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic external structure diagram of the connection between the push plate and the threaded feeding rod of the present invention;

[0033] Figure 2 It is a schematic cross-sectional external structure diagram of the present invention;

[0034] Figure 3 It is a schematic cross-sectional structure diagram of the cylinder working inside the housing of the present invention;

[0035] Figure 4 It is a schematic cross-sectional structure diagram of the cylinder not working inside the housing of the present invention;

[0036] Figure 5 It is a schematic cross-sectional side view structure diagram of the whole of the present invention;

[0037] Figure 6 It is a schematic cross-sectional top view structure diagram of the housing of the present invention;

[0038] Figure 7 is Figure 5 an enlarged view of the structure at position A;

[0039] Figure 8 is Figure 5 an enlarged view of the structure at position B;

[0040] Figure 9 It is a schematic cross-sectional side view connection structure diagram of the threaded feeding rod and the first connecting rod of the present invention;

[0041] Figure 10 is Figure 3 an enlarged view of the structure at position C;

[0042] Figure 11 is Figure 4 an enlarged view of the structure at position D.

[0043] In the figure: 1 housing, 2 mounting box, 3 first cylinder, 4 first support rod, 5 mounting table, 6 placement table, 7 waste chute, 8 controller, 9 first motor, 10 threaded rod, 11 mounting block, 12 mounting plate, 13 second support rod, 14 scraper, 15 cleaning brush, 16 elastic airbag, 17 extrusion block, 18 first spring, 19 air inlet pipe, 20 air outlet pipe, 21 feeding hose, 22 discharging device, 23 print head, 24 one-way air inlet valve, 25 pressure valve, 26 connecting block, 27 limiting rod, 28 mounting groove, 29 sleeve, 30 second spring, 31 positioning rod, 32 positioning block, 33 positioning groove, 34 discharging pipe, 35 feeding pipe, 36 heater, 37 threaded feeding rod, 38 second motor, 39 first connecting rod, 40 connecting ring, 41 second cylinder, 42 second connecting rod, 43 push plate, 44 waste box, 45 first guide rail, 46 third support rod, 47 first slider, 48 second guide rail, 49 fourth support rod, 50 second slider, 51 discharging port. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] By providing a 3D printing head and a 3D printer in an embodiment of the present invention, the technical problems are solved that after the 3D printer finishes printing, plastic materials will remain on the top of the placement table 6, thus affecting the printing accuracy of the next time; when the printed and formed article is relatively large, it is inconvenient for the staff to take it out from the inside of the housing 1; when the article is formed, the feeding pipe 35 stops conveying raw materials, so that the remaining raw materials inside cool and adhere to the inner wall of the feeding pipe 35. When printing is required next time, the raw materials remaining on the inner wall of the feeding pipe 35 are heated first. However, the layer of raw materials closest to the inner wall of the feeding pipe 35 will become paste-like due to continuous heat absorption, thus affecting the printing quality.

[0048] The technical solution in the embodiment of the present invention to solve the above technical problems is generally as follows: By turning on the first motor 9, the first motor 9 drives the mounting plate 12 to translate through the threaded rod 10. During the translation of the mounting plate 12, the surface of the placement table 6 is cleaned by the scraper 14 and the cleaning brush 15. When the mounting plate 12 moves to one end close to the extrusion block 17, the waste is scraped to the bottom of the housing 1 through the movement of the mounting plate 12, and the elastic airbag 16 is driven to be squeezed through the movement of the mounting plate 12, so that the mounting plate 12 blows the waste residue on the inner wall of the bottom of the housing 1 into the waste bin 44 through the air outlet pipe 20. Compared with the existing manual cleaning, it saves time and effort and also avoids the accumulation of waste residue inside the housing 1; By operating the controller 8 to drive the second spring 30 to contract, it is convenient to open the engagement of the positioning rod 31 with the positioning block 32, so as to facilitate the staff to take out the placement table 6. Compared with the existing integrated workbench, the operator can judge whether to take out the placement table 6 according to the size of the printed object, which is convenient for the operator to take out large printed objects; When adding raw materials, the second cylinder 41 is turned on, so that the second cylinder 41 drives the threaded feeding rod 37 to move inside the discharge pipe 34 through the second connecting rod 42, so that the raw materials inside the discharge pipe 34 can be scraped by the push plate 43. Compared with the existing direct transportation through the threaded feeding rod 37, the situation of raw materials being burnt and pasted inside the discharge pipe 34 can be reduced, so as to ensure the quality of the transported raw materials.

[0049] Please refer to Figures 1 to 11 , the present invention provides a 3D printing head and a 3D printer, and the technical solution is as follows:

[0050] A 3D printer includes a housing 1;

[0051] An installation box 2, fixedly connected to the top of the housing 1;

[0052] A first cylinder 3, fixedly connected to the center of the inner wall of the bottom of the housing 1, and the output end of the first cylinder 3 is fixedly connected with a first support rod 4;

[0053] An installation table 5, fixedly connected to the top of the first support rod 4;

[0054] A placement table 6, slidably connected to the top of the installation table 5;

[0055] A waste slot 7, opened at one end of the housing 1;

[0056] A controller 8, fixedly connected to the outer wall of the housing 1;

[0057] A discharge port 51, opened at one end of the housing 1;

[0058] One end of the housing 1 is fixedly connected to a first motor 9. The output end of the first motor 9 is fixedly connected to a threaded rod 10. The other end of the threaded rod 10 is rotatably connected to the inner wall of the housing 1. The inner wall of the housing 1 is fixedly connected to a mounting block 11. A mounting plate 12 is sleeved on the outer wall of the threaded rod 10. The inner wall of the mounting plate 12 is provided with a thread adapted to the threaded rod 10. The inner wall of the housing 1 is fixedly connected to a second support rod 13. The other end of the mounting plate 12 is slidably connected to the second support rod 13. The bottom of the mounting plate 12 is symmetrically and fixedly connected with scraping plates 14. The bottom of the mounting plate 12 is fixedly connected with a cleaning brush 15. One end of the mounting block 11 close to the mounting plate 12 is symmetrically and fixedly connected with a plurality of elastic air bags 16. The other ends of the plurality of elastic air bags 16 are fixedly connected to a pressing block 17. A first spring 18 is sleeved on the outer wall of the elastic air bag 16. One end of the first spring 18 is fixedly connected to the mounting block 11. The other end of the first spring 18 is fixedly connected to the pressing block 17. One end of the elastic air bag 16 close to the mounting block 11 is fixedly connected to an air inlet pipe 19. The air inlet pipe 19 is communicated with the elastic air bag 16. The air inlet pipe 19 penetrates through the mounting block 11. The other end of the air inlet pipe 19 penetrates through the housing 1. One end of the elastic air bag 16 is fixedly connected to an air outlet pipe 20. The air outlet pipe 20 penetrates through the mounting block 11. The inner wall of the mounting box 2 is fixedly connected to a feeding hose 21. The bottom of the feeding hose 21 is fixedly connected to a discharging device 22. The bottom of the discharging device 22 is fixedly connected to a printing head 23.

[0059] Before printing, first control the first motor 9 to drive the threaded rod 10 to rotate, so that the threaded rod 10 drives the mounting plate 12 to move to the right, and then start printing the article. When the article is being printed, control the first support rod 4 to descend uniformly through the first cylinder 3. When the article is printed, drive the first support rod 4 to move upward through the first cylinder 3, so that the placing table 6 returns to its original position. Then, control the first motor 9 to drive the threaded rod 10 to rotate reversely, so that the threaded rod 10 drives the mounting plate 12 to move to the left. During the movement of the mounting plate 12, the residues on the top of the placing table 6 are cleaned by the scraping plates 14 and the cleaning brush 15 at the bottom. During the movement of the mounting plate 12 to the left, the residues are swept to the inner wall on the left side of the housing 1. At this time, the threaded rod 10 drives the mounting plate 12 to continue moving to the left. During the movement, the mounting plate 12 presses the pressing block 17. At this time, the pressing block 17 presses the elastic air bag 16 and the first spring 18. The elastic air bag 16 sprays the internal gas through the air outlet pipe 20, so that the waste on the inner wall at the bottom left of the housing 1 is blown into the waste box 44 through the waste slot 7, thus completing the cleaning of the waste. When the waste is cleaned up, continue to control the mounting plate 12 to move to the rightmost through the first motor 9. At this time, the first spring 18 and the elastic air bag 16 are no longer stressed, and at the same time the first spring 18 starts to rebound. During the rebounding process, the elastic air bag 16 is driven to reset. At this time, the elastic air bag 16 intakes and inflates through the air inlet pipe 19, so as to facilitate the next cleaning of the waste.

[0060] As an embodiment of the present invention, referring to Figure 3 , Figure 5 and Figure 6 , a one-way intake valve 24 is fixedly installed on the outer wall of the intake pipe 19, a pressure valve 25 is fixedly installed on the outer wall of the outlet pipe 20, and the bottom of the outlet pipe 20 faces the waste chute 7.

[0061] The one-way intake valve 24 enables gas to enter from the intake pipe 19 and prevents the gas from spraying out of the intake pipe 19 when the elastic airbag 16 sprays gas, so that the gas inside the elastic airbag 16 can be concentrated and sprayed out from the outlet pipe 20, thereby ensuring the flow rate and flow volume of the gas. The pressure valve 25 enables the gas to spray out from the outlet pipe 20 after reaching a certain pressure, facilitating the cleaning of waste.

[0062] As an embodiment of the present invention, referring to Figure 5 and Figure 6 , multiple elastic airbags 16 are at the same horizontal height as the mounting plate 12.

[0063] Multiple elastic airbags 16 are used to clean the waste at the bottom of the housing 1 simultaneously, preventing the accumulation of waste.

[0064] As an embodiment of the present invention, referring to Figure 4 , Figure 5 and Figure 6 , connection blocks 26 are symmetrically and fixedly connected to both ends of the mounting table 5, limiting rods 27 are symmetrically and fixedly connected to the inner wall of the housing 1, the connection blocks 26 are sleeved on the outer wall of the limiting rods 27, and the limiting rods 27 are slidably connected to the connection blocks 26.

[0065] The sliding connection between the connection blocks 26 by the limiting rods 27 increases the stability when the mounting table 5 and the placement table 6 move up and down, facilitating the processing and shaping of items.

[0066] As an embodiment of the present invention, referring to Figure 5 and Figure 8 , an installation groove 28 is formed in the inner wall of the mounting table 5, a sleeve 29 is fixedly connected to the inner wall of the installation groove 28, a second spring 30 is fixedly connected to the inner wall of the sleeve 29, a positioning rod 31 is slidably connected to the inner wall of the sleeve 29, the other end of the second spring 30 is fixedly connected to the bottom of the positioning rod 31, a positioning block 32 is fixedly connected to one end of the placement table 6, a positioning groove 33 is formed inside the positioning block 32, and the positioning rod 31 is engaged with the positioning groove 33.

[0067] After a larger item is processed and formed, the operator first energizes the second spring 30 through the controller 8. At this time, the second spring 30 contracts and drives the positioning rod 31 to be withdrawn from the positioning groove 33 inside the positioning block 32. At this time, the operator can pull one end of the mounting table 5 from the discharge port 51 to draw out the mounting table 5, so as to take out the printed item on the top of the mounting table 5. Then, the positioning block 32 is placed back on the top of the mounting table 5. At this time, the power supply to the second spring 30 is ended. At this time, the second spring 30 rebounds and drives the positioning rod 31 to engage with the positioning block 32 again, thus completing the taking of the material.

[0068] As an implementation manner of the present invention, referring to Figure 8 , the outer wall dimension of the positioning rod 31 is adapted to the inner wall dimension of the positioning groove 33, and the controller 8 is electrically connected to the second spring 30.

[0069] By making the outer wall dimension of the positioning rod 31 adapted to the inner wall dimension of the positioning groove 33, the stability of the connection between the positioning rod 31 and the positioning groove 33 can be ensured.

[0070] As an implementation manner of the present invention, referring to Figure 3 , Figure 9 , Figure 10 and Figure 11 , a discharge pipe 34 is fixedly connected to the inner wall of the installation box 2. A feeding pipe 35 is fixedly connected to the top of the discharge pipe 34. Heaters 36 are fixedly connected to the outer wall of the discharge pipe 34 at equal intervals. A threaded feeding rod 37 is slidably connected inside the discharge pipe 34. A second motor 38 is fixedly connected inside the installation box 2. A first connecting rod 39 is fixedly connected to the output end of the second motor 38. One end of the threaded feeding rod 37 is sleeved on the outer wall of the first connecting rod 39. A connecting ring 40 is rotatably connected to the outer wall of one end of the threaded feeding rod 37. A second cylinder 41 is fixedly connected inside the installation box 2. A second connecting rod 42 is fixedly connected to the output end of the second cylinder 41. Push plates 43 are fixedly connected to the outer wall of the threaded feeding rod 37 at equal intervals. One end of the discharge pipe 34 is fixedly connected to a feeding hose 21, and the feeding hose 21 is communicated with the discharge pipe 34.

[0071] When it is necessary to add raw materials, turn on the heater 36. While putting the raw materials into the feeding pipe 35, turn on the second motor 38 at the same time. At this time, the second motor 38 drives the first connecting rod 39 and the threaded feeding rod 37 to convey the materials through rotation. At the same time, the heater 36 heats the raw materials. In order to prevent the remaining raw materials from being overheated and charred last time, turn on the second cylinder 41 at this time to drive the second connecting rod 42 to move reciprocally. As a result, the second connecting rod 42 drives the connecting ring 40 and the threaded feeding rod 37 to move, so that the threaded feeding rod 37 drives the push plate 43 to clean the inner wall of the discharge pipe 34 when moving reciprocally, so as to make it fully mix with the newly added raw materials, thereby preventing overheating. As the threaded feeding rod 37 rotates, the liquid raw materials enter the inside of the feeding hose 21, which is convenient for the discharging device 22 to print through the print head 23.

[0072] As an implementation manner of the present invention, refer to Figure 10 , the shape of the heater 36 is annular.

[0073] The annular heater 36 can uniformly heat the inside of the discharge pipe 34, so as to ensure the uniform heating of the raw materials.

[0074] As an implementation manner of the present invention, refer to Figure 5 , a waste box 44 is snap-fitted at one end of the housing 1, and the opening of the waste box 44 communicates with the waste slot 7.

[0075] The waste box 44 facilitates the recycling of waste, so as to facilitate the operator to clean up centrally.

[0076] A 3D print head, refer to Figure 4 and Figure 5 , including a discharging device 22. First guide rails 45 are symmetrically and slidably connected inside the housing 1. Third support rods 46 are slidably connected to the inner wall of the discharging device 22. First sliders 47 are fixedly connected to both ends of the third support rods 46. The third support rods 46 are slidably connected to the first guide rails 45 through the first sliders 47. Second guide rails 48 are symmetrically and slidably connected inside the housing 1. Fourth support rods 49 are slidably connected to the inner wall of the discharging device 22. Second sliders 50 are fixedly connected to both ends of the fourth support rods 49. The fourth support rods 49 are slidably connected to the second guide rails 48 through the second sliders 50. The controller 8 is electrically connected to the first guide rails 45, and the controller 8 is electrically connected to the second guide rails 48. The material of the print head 23 is aluminum alloy.

[0077] The first guide rail 45 and the second guide rail 48 are controlled by the controller 8. The first guide rail 45 and the second guide rail 48 are already very mature in the prior art and are usually referred to as X, Y, and Z-axis motion modules. Then, through the set parameters, the controller 8 drives the first guide rail 45 and the second guide rail 48 respectively, and the first guide rail 45 and the second guide rail 48 drive the first slider 47 and the second slider 50 respectively. Furthermore, the first slider 47 and the second slider 50 drive the third support rod 46 and the fourth support rod 49, so as to be able to drive the discharging device 22 to move back and forth, left and right, thereby facilitating driving the print head 23 to spray materials.

[0078] Working principle: Before printing, first control the first motor 9 to drive the threaded rod 10 to rotate, so that the threaded rod 10 drives the mounting plate 12 to move to the right, and then start printing. First, when adding raw materials, the staff opens the heater 36, and while putting the raw materials into the feeding pipe 35, the second motor 38 is turned on. At this time, the second motor 38 drives the first connecting rod 39 and the screw feeding rod 37 to convey the materials through rotation. At the same time, the heater 36 heats the raw materials. To prevent the remaining raw materials from being overheated and charred last time, at this time, the second cylinder 41 is turned on to drive the second connecting rod 42 to move reciprocally. At this time, the second connecting rod 42 drives the screw feeding rod 37 to move reciprocally through the connecting ring 40. At this time, the screw feeding rod 37 scrapes the raw materials inside the discharge pipe 34 through the push plate 43, so that it can be fully mixed with the newly added raw materials, thus preventing overheating. As the screw feeding rod 37 rotates, the liquid raw materials enter the inside of the feeding hose 21. The first guide rail 45 and the second guide rail 48 are controlled by the controller 8. The first guide rail 45 and the second guide rail 48 are already very mature in the prior art and are usually called the X, Y, and Z-axis motion modules. Then, according to the set parameters, the controller 8 drives the first guide rail 45 and the second guide rail 48 respectively, and the first guide rail 45 and the second guide rail 48 drive the first slider 47 and the second slider 50 respectively. Furthermore, the first slider 47 and the second slider 50 drive the third support rod 46 and the fourth support rod 49, so as to be able to drive the discharging device 22 to move back and forth and left and right, thus facilitating driving the print head 23 to spray materials. When an item is being printed, the first cylinder 3 controls the first support rod 4 to descend uniformly. When the item is printed, the first cylinder 3 drives the first support rod 4 to move upward, so that the placement table 6 returns to its original position. Then, control the first motor 9 to drive the threaded rod 10 to rotate reversely, so that the threaded rod 10 drives the mounting plate 12 to move to the left. During the movement of the mounting plate 12, the residues on the top of the placement table 6 are cleaned by the bottom scraper 14 and the cleaning brush 15. During the movement of the mounting plate 12 to the left, the residues are swept to the inner wall on the left side of the housing 1. At this time, the threaded rod 10 drives the mounting plate 12 to continue moving to the left. During the movement, the mounting plate 12 presses the extrusion block 17. At this time, the extrusion block 17 presses the elastic airbag 16 and the first spring 18. The elastic airbag 16 sprays the internal gas through the air outlet pipe 20, so as to blow the waste materials on the bottom inner wall on the left side of the housing 1 into the waste material box 44 through the waste material groove 7, thus completing the cleaning of the waste materials. When the waste materials are cleaned up, the first motor 9 continues to control the mounting plate 12 to move to the rightmost side. At this time, the first spring 18 and the elastic airbag 16 are no longer stressed, and at the same time, the first spring 18 starts to rebound. During the rebounding process, the elastic airbag 16 is driven to reset. At this time, the elastic airbag 16 intakes and inflates through the air inlet pipe 19, so as to facilitate the next cleaning of the waste materials. When a larger item is processed and formed,First, the operator energizes the second spring 30 through the controller 8. At this time, the second spring 30 contracts, driving the positioning rod 31 to be withdrawn from the positioning groove 33 inside the positioning block 32. At this time, the operator can withdraw the mounting table 5, so as to take out the printed items on the top of the mounting table 5. Then, the positioning block 32 is placed back on the top of the mounting table 5. At this time, the power supply to the second spring 30 is ended. At this time, the second spring 30 rebounds, driving the positioning rod 31 to engage with the positioning block 32 again, thus completing the taking of materials.

[0079] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printer, comprising a housing (1), a mounting box (2) fixedly connected to the top of the housing (1); a first cylinder (3) fixedly connected to the center of the inner wall of the bottom of the housing (1), and a first support rod (4) fixedly connected to the output end of the first cylinder (3); a mounting table (5) fixedly connected to the top of the first support rod (4); a placement table (6) slidably connected to the inside of the mounting table (5); a waste slot (7) opened at one end of the housing (1); a controller (8) fixedly connected to the outer wall of the housing (1); a discharge port (51) opened at one end of the housing (1); characterized in that: One end of the housing (1) is fixedly connected to a first motor (9). The output end of the first motor (9) is fixedly connected to a threaded rod (10). The other end of the threaded rod (10) is rotatably connected to the inner wall of the housing (1). The inner wall of the housing (1) is fixedly connected to a mounting block (11). A mounting plate (12) is sleeved on the outer wall of the threaded rod (10). The inner wall of the mounting plate (12) is provided with a thread adapted to the threaded rod (10). The inner wall of the housing (1) is fixedly connected to a second support rod (13). The other end of the mounting plate (12) is slidably connected to the second support rod (13). The bottom of the mounting plate (12) is symmetrically and fixedly connected with scraping plates (14). The bottom of the mounting plate (12) is fixedly connected with a cleaning brush (15). One end of the mounting block (11) close to the mounting plate (12) is symmetrically and fixedly connected with a plurality of elastic air bags (16). The other ends of the plurality of elastic air bags (16) are fixedly connected with extrusion blocks (17). A first spring (18) is sleeved on the outer wall of the elastic air bag (16). One end of the first spring (18) is fixedly connected to the mounting block (11). The other end of the first spring (18) is fixedly connected to the extrusion block (17). One end of the elastic air bag (16) close to the mounting block (11) is fixedly connected with an air inlet pipe (19). The air inlet pipe (19) is communicated with the elastic air bag (16). The air inlet pipe (19) penetrates through the mounting block (11). The other end of the air inlet pipe (19) penetrates through the housing (1). One end of the elastic air bag (16) is fixedly connected with an air outlet pipe (20). The air outlet pipe (20) penetrates through the mounting block (11). The inner wall of the mounting box (2) is fixedly connected with a feeding hose (21). The bottom of the feeding hose (21) is fixedly connected with a discharging device (22). The bottom of the discharging device (22) is fixedly connected with a printing head (23); A one-way intake valve (24) is fixedly installed on the outer wall of the air inlet pipe (19). A pressure valve (25) is fixedly installed on the outer wall of the air outlet pipe (20). The bottom of the air outlet pipe (20) faces the waste slot (7); The plurality of elastic air bags (16) and the mounting plate (12) are at the same horizontal height; Both ends of the mounting table (5) are symmetrically and fixedly connected with connecting blocks (26). The inner wall of the housing (1) is symmetrically and fixedly connected with limiting rods (27). The connecting blocks (26) are sleeved on the outer walls of the limiting rods (27). The limiting rods (27) are slidably connected with the connecting blocks (26); An installation groove (28) is formed in the inner wall of the mounting table (5). A sleeve (29) is fixedly connected to the inner wall of the installation groove (28). A second spring (30) is fixedly connected to the inner wall of the sleeve (29). A positioning rod (31) is slidably connected to the inner wall of the sleeve (29). The other end of the second spring (30) is fixedly connected to the bottom of the positioning rod (31). One end of the placing table (6) is fixedly connected with a positioning block (32). A positioning groove (33) is formed inside the positioning block (32). The positioning rod (31) is engaged with the positioning groove (33); The outer wall dimensions of the positioning rod (31) are adapted to the inner wall dimensions of the positioning groove (33), and the controller (8) is electrically connected to the second spring (30); A discharge pipe (34) is fixedly connected to the inner wall of the installation box (2). A feeding pipe (35) is fixedly connected to the top of the discharge pipe (34). Heaters (36) are fixedly connected to the outer wall of the discharge pipe (34) at equal intervals. A threaded feeding rod (37) is slidably connected inside the discharge pipe (34). A second motor (38) is fixedly connected to the inside of the installation box (2). A first connecting rod (39) is fixedly connected to the output end of the second motor (38). One end of the threaded feeding rod (37) is sleeved on the outer wall of the first connecting rod (39). A connecting ring (40) is rotatably connected to the outer wall of one end of the threaded feeding rod (37). A second cylinder (41) is fixedly connected to the inside of the installation box (2). A second connecting rod (42) is fixedly connected to the output end of the second cylinder (41). Push plates (43) are fixedly connected to the outer wall of the threaded feeding rod (37) at equal intervals. One end of the discharge pipe (34) is fixedly connected to a feeding hose (21), and the feeding hose (21) is communicated with the discharge pipe (34); The heater (36) is in a ring shape; A waste box (44) is clamped at one end of the housing (1), and the opening of the waste box (44) is communicated with the waste slot (7); When adding raw materials, the staff turns on the heater (36). While putting the raw materials into the feeding pipe (35), the second motor (38) is turned on. At this time, the second motor (38) drives the first connecting rod (39) and the threaded feeding rod (37) to convey the materials. At the same time, the heater (36) heats the raw materials. In order to prevent the remaining raw materials from being overheated and charred, the second cylinder (41) is turned on at this time to drive the second connecting rod (42) to move reciprocally. At this time, the second connecting rod (42) drives the threaded feeding rod (37) to move reciprocally through the connecting ring (40). At this time, the threaded feeding rod (37) scrapes the raw materials inside the discharge pipe (34) through the push plate (43), so that it is fully mixed with the newly added raw materials, thereby preventing overheating; When an item is being printed, the first support rod (4) is controlled to descend uniformly by the first cylinder (3); the operator can judge whether to take out the placement table according to the size of the printed object by himself, which is convenient for the operator to take out large printed objects.

2. A 3D printing head, applicable to the printer as described in Claim 1, characterized in that: It includes a discharging device (22). Inside the housing (1), first guide rails (45) are symmetrically and slidably connected. Inside the wall of the discharging device (22), a third support rod (46) is slidably connected. At both ends of the third support rod (46), first sliders (47) are fixedly connected. The third support rod (46) is slidably connected to the first guide rails (45) through the first sliders (47). Inside the housing (1), second guide rails (48) are symmetrically and slidably connected. Inside the wall of the discharging device (22), a fourth support rod (49) is slidably connected. At both ends of the fourth support rod (49), second sliders (50) are fixedly connected. The fourth support rod (49) is slidably connected to the second guide rails (48) through the second sliders (50). The controller (8) is electrically connected to the first guide rails (45), and the controller (8) is electrically connected to the second guide rails (48). The printing head (23) is made of aluminum alloy.

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