Raw material mixing, stirring and extruding mechanism for 3D printer

Abstract

The utility model provides a raw material mixing, stirring and extruding mechanism for a 3D printer, which comprises a mixing bin body, a mixing chamber is arranged in the mixing bin body, the mixing chamber is communicated with a raw material conveying assembly, a stirring assembly is arranged in the mixing chamber, an extruding head is connected below the mixing bin body, and the extruding head is connected with the mixing bin body. The stirring assembly comprises a second motor arranged at the top of the mixing bin body, the second motor is connected with a second spiral auger, and the second spiral auger is arranged in the mixing cavity and extends into the extrusion head. And the second spiral auger not only can stir the materials, but also can quantitatively convey the materials to the extrusion head.

Description

Technical Field

[0001] The utility model relates to a raw material mixing, stirring and extruding mechanism for a 3D printer, which is applied to the field of 3D printing. Background Art

[0002] A clay 3D printer utilizes 3D printing technology to create ceramic products. It builds three-dimensional objects layer by layer, offering greater design freedom and production efficiency than traditional ceramic production. The printer's core components include a forming cylinder, a feed cylinder, a residual recovery bag, a nozzle, an XYZ three-dimensional transport system, a body, and a housing. The forming cylinder processes parts, the feed cylinder forms and supports the printed material, the residual recovery bag recycles excess powder, and the nozzle sprays a binder to bond the powder layers together.

[0003] The existing clay printer extrusion mechanism usually prints 3D printed products onto a platform based on a preset printing model. However, the existing extrusion mechanism is usually connected to an external mixed material for printing, which may cause material deposition and blockage. Therefore, to address the above problem, the utility model designs a raw material mixing and stirring extrusion mechanism for a 3D printer. Utility Model Content

[0004] The utility model provides a raw material mixing, stirring and extruding mechanism for a 3D printer, which can effectively solve the above problems.

[0005] The utility model is achieved in this way:

[0006] A raw material mixing, stirring and extruding mechanism for a 3D printer, comprising:

[0007] It includes a mixing silo, which has a mixing chamber built in it, which is connected to the raw material conveying component, a stirring component is provided in the mixing chamber, an extrusion head is connected below the mixing silo, and the stirring component includes a second motor arranged on the top of the mixing silo, the second motor is connected to a second spiral auger, and the second spiral auger is arranged in the mixing chamber and extends to the inside of the extrusion head.

[0008] As a further improvement, a first fixed shaft sleeve is provided above the second spiral auger, a plurality of first stirring paddles are provided on the first fixed shaft sleeve, a second fixed shaft sleeve is provided below the first fixed shaft sleeve and is sleeved on the second spiral auger, a second stirring paddle is provided on the second fixed shaft sleeve (325), the projections of the first stirring paddle and the second stirring paddle on the horizontal plane are arranged at equal intervals, and the first stirring paddle and the second stirring paddle rotate with the rotation of the spiral auger.

[0009] As a further improvement, the first stirring paddle includes several first stirring rods, the first stirring rod includes a horizontal section connected to the first fixed shaft sleeve, the horizontal section is bent downward at one end away from the first fixed shaft sleeve to form an inclined section, the inclined section is arranged parallel to the inner wall of the mixing bin, a vertically arranged second stirring rod is connected between the horizontal section and the inclined section, and a ring-shaped stirring rod coaxially arranged with the second spiral auger is connected to the top of several first stirring rods.

[0010] As a further improvement, the second stirring paddle is a plurality of stirring blades.

[0011] As a further improvement, the mixing bin is connected to an external water tank via a delivery pipe.

[0012] The beneficial effect of the present invention is that materials are stored by setting up a mixing chamber, and then the materials are stirred by a stirring assembly in the mixing chamber to prevent material deposition and blockage. The stirring assembly includes a second motor arranged on the top of the mixing bin body, the second motor is connected to a second spiral auger, and the second spiral auger is arranged in the mixing chamber and extends to the inside of the extrusion head. The second spiral auger can not only stir the material, but also realize quantitative delivery to the extrusion head. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the printing device provided by an embodiment of the utility model.

[0015] Figure 2 It is a schematic diagram of the internal structure of the accommodating chamber and the printing chamber provided in an embodiment of the present utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the conveying component provided by an embodiment of the present utility model.

[0017] Figure 4 It is a schematic diagram of the side structure of the conveying component provided by an embodiment of the present utility model.

[0018] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure at AA in the middle.

[0019] Figure 6It is a schematic diagram of the structure of the mixing extrusion unit provided in an embodiment of the present utility model.

[0020] Figure 7 It is a schematic diagram of the side structure of the mixing extrusion unit provided in an embodiment of the present utility model.

[0021] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure at BB in the middle.

[0022] Figure 9 It is a schematic structural diagram of a stirring assembly provided in an embodiment of the present utility model.

[0023] Figure 10 It is a schematic diagram of the top view of the mixed extrusion unit provided in an embodiment of the utility model.

[0024] The accompanying drawings are as follows:

[0025] 10. Frame; 11. Accommodating chamber; 12. Printing chamber;

[0026] 20. Raw material conveying unit; 21. Conveying assembly; 211. Raw material storage bin; 212. First auger; 2121. First motor; 213. First feeding storage bin; 214. Baffle plate; 2141. Control switch; 215. Second feeding storage bin; 22. First weighing module; 221. Fixed beam; 222. First mounting plate; 223. Weighing module; 224. Press block; 225. Second mounting plate; 226. Fixed shaft; 2261. Mounting sleeve; 23. Conveying pipeline; 231. Vibrator;

[0027] 30. Mixing and extrusion unit; 31. Extrusion assembly; 311. Mixing chamber; 312. Mixing chamber; 32. Stirring assembly; 321. Second motor; 322. Second auger; 323. First fixed sleeve; 324. First stirring paddle; 3241. First stirring rod; 3241-a. Horizontal section; 3241-b. Inclined section; 3242. Second stirring rod; 3243. Annular stirring rod; 325. Second fixed sleeve; 326. Second stirring paddle; 33. Extrusion head; 34. Moving assembly; 341. First linear module; 342. Second linear module; 343. Third mounting plate; 35. Second weighing module; 351. Annular mounting plate; 352. Pin; 353. Pin sleeve;

[0028] 40. Printing platform;

[0029] 50. External water tank. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0031] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0032] Reference Figures 1-2 As shown, a clay 3D printing device for mixing and conveying raw materials in a fixed ratio includes a frame 10. The frame 10 has a double-layer shell structure and includes a accommodating chamber 11 and a printing chamber 12 arranged in an upper and lower structure. The bottom of the frame is provided with a plurality of universal wheels for movement, and a plurality of raw material barrels are placed next to the frame. The raw material barrels are used to store raw materials. A raw material conveying unit 20 is provided on the top of the frame 10.

[0033] Reference Figures 3-5As shown, the raw material conveying unit 20 includes a plurality of conveying assemblies 21 arranged above the frame 10. In this embodiment, there are two conveying assemblies. The conveying assemblies 21 are used to convey different raw materials. The conveying assembly 21 includes a raw material storage bin 211. A first feeding storage bin 213 arranged horizontally is connected below the raw material storage bin 211. A first spiral auger 212 is arranged in the first feeding storage bin 213. The raw materials are quantitatively conveyed by the first spiral auger 212 through the forward spiral recursion. The first spiral auger 212 is driven by a first motor 2121 arranged on the side wall of the first feeding storage bin 213. A second feeding storage bin 215 is arranged below the first feeding storage bin 213. The first feeding storage bin 213 quantitatively transports raw materials from the raw material storage bin 211 to the second feeding storage bin 215. A rotatable baffle plate 214 is arranged in the second feeding storage bin 215. The baffle plate 214 is controlled to rotate by a switch arranged on the side wall of the second feeding storage bin 215. The rotating baffle plate 214 is rotated to rotate the baffle plate. The plate 214 can transport the raw materials downward. The bottom of the second feeding storage bin 215 is connected to a conveying pipe 23, which is a flexible pipe. A vibrator 231 is provided on the conveying pipe 23. In this embodiment, the vibrator 231 is a pneumatic vibrator. The advantage of the pneumatic vibrator is that the noise is small and the vibration effect is good. The function of the vibrator 231 is to prevent the raw materials from being blocked. Since the conveying pipe 23 is a flexible pipe and the vibrator is provided on the flexible pipe, the advantage of such a setting is that it can not only prevent the raw materials from being blocked, but also reduce the impact of the vibrator vibration on the printer. If the vibrator is provided on the raw material storage bin 211, since the raw material storage bin 211 is fixedly provided on the frame, when the vibrator 231 is started, the vibrator 231 may drive the frame to vibrate, thereby causing the printing platform to vibrate, which will affect the 3D printing accuracy. If the vibrator 231 is provided on the flexible conveying pipe 23, the impact of the vibrator 23 on the frame 10 will be reduced, thereby reducing the impact on the 3D printing accuracy.

[0034] Reference Figures 6-10As shown, the mixing extrusion unit 30 includes an extrusion component 31 that can be laterally moved and arranged in the accommodating chamber 11 and is connected to the conveying component 21. The extrusion component 31 includes a mixing bin body 311, and the mixing bin body 311 has a mixing chamber 312 built in it. The second feeding storage bin 215 is connected to the mixing chamber 312 through a conveying pipe 23. The mixing chamber 312 is connected to the raw material conveying component 21. A stirring component 32 is arranged in the mixing chamber 312, and an extrusion head 33 is connected to the bottom of the mixing bin body 311. The stirring assembly 32 includes a second motor 321 arranged at the top of the mixing silo 311, the second motor 321 is connected to the second spiral auger 322, the second spiral auger 322 is arranged in the mixing chamber 312 and extends to the inside of the extruder head 33, the second spiral auger 322 spirally recursively downward for quantitative transportation of the mixed material, a first fixed shaft sleeve 323 is sleeved above the second spiral auger 322, a plurality of first stirring paddles 324 are provided on the first fixed shaft sleeve 323, a second fixed shaft sleeve 325 is provided below the first fixed shaft sleeve 323 and is sleeved on the second spiral auger 322, a second stirring paddle 326 is provided on the second fixed shaft sleeve 325, the projections of the first stirring paddle 324 and the second stirring paddle 326 on the horizontal plane are equidistantly arranged, and the first stirring paddle 324 and the second stirring paddle 326 rotate with the rotation of the spiral auger, the mixing silo 311 is connected to the external water tank 50 through the conveying pipe 23, and the external water tank 50 is used for water supply.

[0035] The printing platform 40 can be longitudinally slidably arranged in the printing chamber 12 to carry 3D printed products. As the number of printed layers increases, the printing platform 40 needs to be lowered accordingly. The printing platform 40 slides longitudinally by rotating the lead screw driven by a motor. Since this structure is a prior art, it will not be described in detail here.

[0036] As a further improvement, a first weighing module 22 is provided on the second feeding storage bin 215, and the first weighing module 22 includes a fixed beam 221 arranged in the accommodating chamber 11 and installed on the frame 10, and a first mounting plate 222 is provided on the fixed beam 221, and a weighing module 223 is provided on the first mounting plate 222. In this embodiment, there is one weighing module 223, and a pressure block 224 is provided on the side wall of the second feeding storage bin 215, and the pressure block 224 abuts against the weighing module 223. The weight of the raw material storage bin 211 is measured by the weighing module 223, and the amount of raw materials in the raw material storage bin 223 can be obtained through the heavy module 223. And through the numerical value fed back by the weighing module 223, it can also be known whether the material in the raw material storage bin 211 is blocked. A second mounting plate 225 is provided above the second feeding storage bin 215, and a fixed shaft 226 is slidably connected to the side wall of the second mounting plate 225, and a mounting sleeve 2261 is provided on the second mounting plate 225, and the fixed shaft 226 can be slidably set in the mounting sleeve 2261, and the other end of the fixed shaft 226 is fixedly connected to the first mounting plate 222. The fixed shaft 226 is slidably set in the mounting sleeve 2261, so that the raw material storage bin 211 is limited in the vertical direction. When raw materials are added to the raw material storage bin 211, the raw material storage bin 211 will not have a large weighing error due to the offset of the center of gravity. Therefore, only one weighing module 223 can be set on the raw material storage bin 211, which can not only accurately obtain the weighing value, but also reduce the equipment manufacturing cost.

[0037] As a further improvement, the first stirring paddle 324 includes a plurality of first stirring rods 3241, and the first stirring rod 3241 includes a horizontal section 3241-a connected to the first fixed shaft sleeve 323, and the horizontal section 3241-a is bent downward at one end away from the first fixed shaft sleeve 323 to form an inclined section 3241-b, and the inclined section 3241-b is arranged parallel to the inner wall of the mixing bin 311. By arranging the first stirring rod 3241 close to the mixing bin 311, the material in the mixing bin 311 can be stirred to the maximum extent. A vertically arranged second stirring rod 3242 is connected between the horizontal section 3241-a and the inclined section 3241-b. The second stirring rod 3242 can not only enhance the strength of the first stirring rod 3241, but also stir the material in the inner circle. The top of the first stirring rod 3241 is connected to an annular stirring rod 3243 coaxially arranged with the second spiral auger 322. The function of the annular stirring rod 3241 is to enhance the strength of the first stirring rod 3241. The second stirring paddle 326 is a plurality of stirring blades, and the stirring efficiency of the second stirring paddle 326 is higher.

[0038] As a further improvement, a moving component 34 is provided at the bottom of the accommodating chamber 11, and the moving component 34 includes a first linear module 341 fixed on the frame 10, and a second linear module 342 arranged on the first linear module 341, and a slidable third mounting plate 343 is provided on the second linear module 342, and a second weighing module 35 is provided on the third mounting plate 343, and the weighing module 223 abuts the mixing bin body 311 above. In this embodiment, the second weighing module 35 includes three weighing modules 223, and the three weighing modules 223 are equidistantly arranged in a circular array below the mixing bin body 311. The weighing modules 223 can not only weigh the weight of the material in the mixing bin body 311, but also can determine whether the mixing bin body 311 is horizontally set through the weighing modules 223.

[0039] As a further improvement, the second weighing module 35 includes an annular mounting plate 351 arranged on the outer wall of the mixing silo body 311, and a pin shaft 352 is provided on the annular mounting plate 351. A pin shaft sleeve 353 corresponding to the pin shaft 352 is provided on the third mounting plate 343. The pin shaft 352 is arranged in the pin shaft sleeve 353, which can effectively maintain the center of gravity of the mixing silo body 311 and prevent large measurement errors of the weighing module 223.

[0040] The working principle of the present invention is as follows: different raw materials can be effectively conveyed to the mixing and extrusion unit 30 by a plurality of conveying assemblies 21 arranged above the frame 10. The raw materials are first mixed and stirred in the mixing and stirring mechanism 30 and then extruded through the extrusion assembly 31 to print the 3D printing material into a preset shape. The present invention mixes the raw materials directly in the printer and then prints them, which can greatly improve efficiency and prevent the clay material from having poor uniformity and stability due to long-term storage or transportation, thereby affecting the continuity of the printing process and the quality of the final product.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A raw material mixing, stirring and extruding mechanism for a 3D printer, characterized in that: include: The invention comprises a mixing silo (311), wherein the mixing silo (311) has a mixing chamber (312) built therein, the mixing chamber (312) is communicated with a raw material conveying assembly (21), a stirring assembly (32) is arranged in the mixing chamber (312), an extrusion head (33) is connected below the mixing silo (311), the stirring assembly (32) comprises a second motor (321) arranged at the top of the mixing silo (311), the second motor (321) is connected to a second spiral auger (322), and the second spiral auger (322) is arranged in the mixing chamber (312) and extends to the inside of the extrusion head (33).

2. A raw material mixing, stirring and extruding mechanism for a 3D printer according to claim 1, characterized in that: A first fixed shaft sleeve (323) is sleeved on the second spiral auger (322), and a plurality of first stirring paddles (324) are arranged on the first fixed shaft sleeve (323). A second fixed shaft sleeve (325) sleeved on the second spiral auger (322) is arranged below the first fixed shaft sleeve (323), and a second stirring paddle (326) is arranged on the second fixed shaft sleeve (325). The projections of the first stirring paddle (324) and the second stirring paddle (326) on the horizontal plane are arranged at equal intervals, and the first stirring paddle (324) and the second stirring paddle (326) rotate with the rotation of the spiral auger.

3. A raw material mixing, stirring and extruding mechanism for a 3D printer according to claim 2, characterized in that: The first stirring paddle (324) includes a plurality of first stirring rods (3241), the first stirring rod including a horizontal section (3241-a) connected to the first fixed shaft sleeve (323), the horizontal section (3241-a) is bent downward at one end away from the first fixed shaft sleeve (323) to form an inclined section (3241-b), the inclined section (3241-b) is arranged parallel to the inner wall of the mixing bin (311), a vertically arranged second stirring rod (3242) is connected between the horizontal section (3241-a) and the inclined section (3241-b), and a ring-shaped stirring rod (3243) coaxially arranged with the second spiral auger (322) is connected to the top of the plurality of first stirring rods (3241).

4. A raw material mixing, stirring and extruding mechanism for a 3D printer according to claim 3, characterized in that: The second stirring paddle (326) is a plurality of stirring blades.

5. A raw material mixing, stirring and extruding mechanism for a 3D printer according to claim 4, characterized in that: The mixing bin (311) is connected to an external water tank (50) via a delivery pipe (23).

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