3D printer with material backflow prevention structure

Abstract

The 3D printer with the material backflow prevention structure comprises a spray head, an extrusion mechanism is arranged on the inner wall of the spray head, the extrusion mechanism comprises a motor, and a shell of the motor is fixed to the inner wall of the spray head; an output shaft of the motor is fixed with the transmission rod; the surface of the transmission rod is fixed with the extrusion ring; and the fixing ring is fixed on the inner wall of the spray head. According to the 3D printer with the material backflow prevention structure, the extrusion mechanism is arranged, a motor drives a transmission rod to rotate anticlockwise, the transmission rod drives an extrusion ring to rotate anticlockwise, the extrusion ring abuts against and scrapes the inner wall of a spray head, materials are prevented from being attached to the inner wall of the spray head, and under the action of the extrusion ring, the materials are downwards extruded, and small balls are extruded by the materials; the small ball downwards extrudes the spring, the small ball drives the first magnet and the second magnet to attract, the spray head can discharge materials downwards, and due to the downward extrusion force, the effect of preventing the materials from flowing back is achieved.

Description

Technical Field

[0001] The present invention relates to the field of 3D printers, and in particular to a 3D printer with a material backflow prevention structure. Background Art

[0002] 3D printer, also known as 3D printer, is a rapid prototyping process, which uses layer-by-layer stacking to produce three-dimensional models. Its operation process is similar to that of traditional printers, except that traditional printers print ink on paper to form two-dimensional plane drawings, while 3D printers stack liquid photosensitive resin materials, molten plastic filaments, gypsum powder and other materials layer by layer through spraying binders or extrusion to form three-dimensional entities. 3D printing technology is based on computer three-dimensional design models. Through software layered discrete and CNC molding systems, laser beams, hot melt nozzles and other methods are used to stack and bond special materials such as metal powder, ceramic powder, plastic, cell tissue layer by layer, and finally superimposed to produce physical products. Currently, most home 3D printers are FDM fused deposition molding printing. During the printing process, the material is mainly heated and melted into filamentary materials by a heating rod. The nozzle moves along the trajectory set by the computer. At the same time, the melted filamentary material is extruded from the nozzle. After the material is ejected, it quickly solidifies and bonds with the surrounding materials.

[0003] However, in actual use, as the temperature of the 3D printer cools down, it solidifies inside the 3D printer nozzle and is not easy to melt again, affecting the printing work. It condenses and accumulates, thus forming redundant working tumors. In severe cases, it may even clog the print nozzle and be difficult to clean. The material in the machine body may clog the nozzle due to insufficient melting of the material or poor quality of the printing consumables. Summary of the invention

[0004] The main purpose of the present invention is to provide a 3D printer with a material backflow prevention structure, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides a 3D printer with a material backflow prevention structure, comprising a nozzle, an inner wall of which is provided with an extrusion mechanism, and the extrusion mechanism comprises: A motor, a housing of which is fixed on the inner wall of the nozzle; A transmission rod, to which the output shaft of the motor is fixed; An extrusion ring, a surface of the transmission rod being fixed to the extrusion ring; A fixing ring, wherein a fixing ring is fixed on the inner wall of the nozzle; Magnet 1, a magnet 1 is fixed on the inner wall of the nozzle; A spring, wherein the top of the magnet 1 is fixed to one end of the spring; A small ball, wherein one end of the spring away from the magnet is fixed to the small ball; Magnet 2, a magnet 2 is fixed at the bottom of the ball, the material is inserted into the heating element, the heating element melts the material, the motor is turned on and rotated counterclockwise, the motor drives the transmission rod to rotate counterclockwise, the transmission rod drives the extrusion ring to rotate counterclockwise, because the extrusion ring and the inner wall of the nozzle are scraped against each other, the material is prevented from adhering to the inner wall of the nozzle, and under the action of the extrusion ring, the material is squeezed downward, the material squeezes the ball, the ball squeezes the spring downward, the ball drives magnet 1 and magnet 2 to adsorb, the nozzle can discharge the material downward, due to the downward squeezing force, the use plays a role in preventing the material from flowing back; When the discharge stops, the spring overcomes the interaction force of the magnet and drives the ball to move upward. The ball collides with the fixed ring to prevent impurities from returning to the inside of the nozzle, thus playing a role in avoiding impurities.

[0006] Optionally, a reflux mechanism is provided on the inner wall of the nozzle, and the reflux mechanism includes a pipe, the inner wall of the nozzle is fixed to the pipe, a reflux channel 1 is opened on the inner wall of the nozzle, a reflux channel 2 is opened on the inner wall of the nozzle, materials are placed on the top of the nozzle, and the top of the nozzle is fixed to the heating element. When excessive material is accumulated, the material enters the reflux channel 1 through the pipe, the extrusion ring drives the disc, and the disc drives the reflux ring to rotate counterclockwise, and the reflux ring drives the material to move upward and reflux, and the material passes through the reflux channel 2 upward into the middle cavity, thereby preventing the material from cooling and condensing.

[0007] Optionally, a dust suction mechanism is provided on the inner wall of the nozzle, and the dust suction mechanism includes an inner gear ring, a disc is fixed on the top of the extrusion ring, an inner gear ring is fixed on the top of the disc, a gear is fixed on the inner wall of the nozzle, the inner wall of the nozzle is rotatably connected to the outer gear ring, the bottom of the outer gear ring is fixed to the transmission ring, fan blades are fixed on the surface of the transmission ring, and a dust suction channel is fixed on the top of the nozzle, the disc drives the inner gear ring to rotate counterclockwise, the inner gear ring drives the gear to rotate, the gear drives the outer gear ring to rotate, the outer gear ring drives the transmission ring to rotate, the transmission ring drives the fan blades to rotate, and the fan blades drive the air upward, so that the extruded material vaporization and dust impurities are carried upward and collected through the dust suction channel, thereby achieving the purpose of dust suction.

[0008] Optionally, the extrusion ring is a counterclockwise spiral type, the extrusion ring contacts the inner wall of the nozzle, a through hole is opened in the middle of the fixing ring, a groove is opened on the top of the magnet one, and the magnet two is cylindrical.

[0009] Optionally, the reflux channel 1 is annular.

[0010] Optionally, the pipeline connects the inner cavity where the extrusion ring is located with the reflux channel 1.

[0011] Optionally, the reflux ring is a clockwise spiral type.

[0012] Optionally, the fan blades are clockwise spiral type.

[0013] Optionally, the transmission ring is rotatably connected to the inner wall of the spray head.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The 3D printer with a material backflow prevention structure is provided with an extrusion mechanism. The material is inserted into a heating element. The heating element melts the material. The motor is turned on and rotated counterclockwise. The motor drives the transmission rod to rotate counterclockwise. The transmission rod drives the extrusion ring to rotate counterclockwise. Since the extrusion ring scrapes against the inner wall of the nozzle, the material is prevented from adhering to the inner wall of the nozzle. In addition, under the action of the extrusion ring, the material is squeezed downward. The material squeezes the small ball. The small ball squeezes the spring downward. The small ball drives the magnet 1 and the magnet 2 to be adsorbed. The nozzle can discharge the material downward. Due to the downward squeezing force, the material backflow prevention function is achieved.

[0015] (2) The 3D printer with a material backflow prevention structure is provided with an extrusion mechanism. When the material is stopped, the spring overcomes the interaction force of the magnet and drives the ball to move upward. The ball collides with the fixed ring to prevent impurities from returning to the inside of the nozzle, thereby preventing impurities from being introduced into the nozzle.

[0016] (3) The 3D printer with a material backflow prevention structure is provided with a backflow mechanism. When too much material is accumulated, the material enters the backflow channel 1 through the pipeline, the extrusion ring drives the disc, the disc drives the backflow ring to rotate counterclockwise, the backflow ring drives the material to move upward and backflow, and the material passes upward through the backflow channel 2 into the middle cavity, which plays a role in preventing the material from cooling and condensing.

[0017] (4) The 3D printer with a material backflow prevention structure is provided with a dust suction mechanism. The disc drives the inner gear ring to rotate counterclockwise, the inner gear ring drives the gear to rotate, the gear drives the outer gear ring to rotate, the outer gear ring drives the transmission ring to rotate, the transmission ring drives the fan blades to rotate, and the fan blades drive the air upward, so that the extruded material vapor and dust impurities are taken away upward and collected through the dust suction channel, thereby achieving the purpose of dust suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1It is a cross-sectional structural schematic diagram of a top view of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the front view of the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the front view of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a schematic diagram of the enlarged structure of point B in structure 3 of the present invention.

[0020] Description of Figure Numbers: 1. Nozzle; 2. Extrusion mechanism; 201. Motor; 202. Transmission rod; 203. Extrusion ring; 204. Fixed ring; 205. Magnet 1; 206. Spring; 207. Small ball; 208. Magnet 2; 3. Reflux mechanism; 301. Pipe; 302. Reflux channel 1; 303. Reflux ring; 304. Reflux channel 2; 305. Material; 306. Heating element; 4. Dust suction mechanism; 401. Inner gear ring; 402. Gear; 403. Outer gear ring; 404. Transmission ring; 405. Fan blade; 406. Dust suction channel.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Implementation

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] Reference Figures 1 to 5The present invention proposes a 3D printer with a material backflow prevention structure, including a nozzle 1, which is the nozzle of the 3D printer. Through software layered discreteness and CNC molding system, laser beams, hot melt nozzles, etc. are used to stack and bond special materials such as metal powder, ceramic powder, plastic, cell tissue, etc. layer by layer, and finally stack and mold to produce a physical product. At present, most household 3D printers are FDM fused deposition molding printing. During the printing process, the material is mainly heated and melted into filaments by a heating rod. The nozzle 1 moves along the trajectory set by the computer, and the melted filaments are melted. The shaped material is extruded from the nozzle 1, and the material solidifies quickly after being ejected and adheres to the surrounding materials. An extrusion mechanism 2 is arranged on the inner wall of the nozzle 1, and the extrusion mechanism 2 includes: a motor 201, and the housing of the motor 201 is fixed on the inner wall of the nozzle 1; a transmission rod 202, and the output shaft of the motor 201 is fixed to the transmission rod 202; an extrusion ring 203, and the surface of the transmission rod 202 is fixed to the extrusion ring 203; a fixing ring 204, and the fixing ring 204 is fixed on the inner wall of the nozzle 1; a magnet 205, and a magnet 205 is fixed on the inner wall of the nozzle 1; a spring 206, and a magnet 207 is fixed on the inner wall of the nozzle 1; The top of magnet 205 is fixed to one end of spring 206; ball 207, one end of spring 206 away from magnet 1 205 is fixed to ball 207; magnet 208, magnet 208 is fixed to the bottom of ball 207, material 305 is inserted into heating element 306, heating element 306 melts material 305, motor 201 is turned on and rotated counterclockwise, motor 201 drives transmission rod 202 to rotate counterclockwise, transmission rod 202 drives extrusion ring 203 to rotate counterclockwise, because extrusion ring 203 scrapes against the inner wall of nozzle 1, material 305 is prevented from contacting with the inner wall of nozzle 1 Adhesion, and under the action of the extrusion ring 203, the material 305 is squeezed downward, the material 305 squeezes the small ball 207, the small ball 207 squeezes the spring 206 downward, the small ball 207 drives the magnet 1 205 and the magnet 2 208 to adsorb, the nozzle 1 can discharge the material downward, due to the downward extrusion force, it plays a role in preventing the material 305 from flowing back, when the discharge stops, the spring 206 overcomes the interaction force of the magnet and drives the small ball 207 to move upward, the small ball 207 conflicts with the fixed ring 204 to prevent impurities from returning to the interior of the nozzle 1, thereby avoiding impurities.

[0024] In an embodiment of the present invention, a reflux mechanism 3 is arranged on the inner wall of the nozzle 1, and the reflux mechanism 3 includes a pipe 301. The inner wall of the nozzle 1 is fixed to the pipe 301. A reflux channel 1 302 is opened on the inner wall of the nozzle 1, and a reflux channel 2 304 is opened on the inner wall of the nozzle 1. Material 305 is placed on the top of the nozzle 1, and the top of the nozzle 1 is fixed to the heating element 306. When the material 305 is excessively accumulated, the material 305 enters the reflux channel 1 302 through the pipe 301, and the extrusion ring drives the disc, and the disc drives the reflux ring 303 to rotate counterclockwise, and the reflux ring 303 drives the material 305 to move upward and reflux, and the material 305 passes through the reflux channel 2 304 upward into the middle cavity, thereby preventing the material 305 from cooling and condensing.

[0025] In the embodiment of the present invention, a dust suction mechanism 4 is provided on the inner wall of the nozzle 1, and the dust suction mechanism 4 includes an inner gear ring 401, a disc is fixed on the top of the extrusion ring 203, the inner gear ring 401 is fixed on the top of the disc, a gear 402 is fixed on the inner wall of the nozzle 1, the inner wall of the nozzle 1 is rotatably connected with the outer gear ring 403, the bottom of the outer gear ring 403 is fixed to the transmission ring 404, the surface of the transmission ring 404 is fixed with fan blades 405, and a dust suction channel 406 is fixed on the top of the nozzle 1. The disc drives the inner gear ring 401 to rotate counterclockwise, the inner gear ring 401 drives the gear 402 to rotate, the gear 402 drives the outer gear ring 403 to rotate, the outer gear ring 403 drives the transmission ring 404 to rotate, the transmission ring 404 drives the fan blades 405 to rotate, and the fan blades 405 drive the air upward, so that the gasified product and dust impurities of the extruded material 305 are taken away upward and collected through the dust suction channel 406, thereby achieving the effect of dust suction.

[0026] In the embodiment of the present invention, the extrusion ring 203 is a counterclockwise spiral, the extrusion ring 203 contacts the inner wall of the nozzle 1, a through hole is opened in the middle of the fixing ring 204, a groove is opened on the top of the magnet 1 205, and the magnet 2 208 is cylindrical.

[0027] In the embodiment of the present invention, the reflux channel 1 302 is annular.

[0028] In the embodiment of the present invention, the pipeline 301 connects the inner cavity where the extrusion ring 203 is located with the reflux channel 1 302 .

[0029] In the embodiment of the present invention, the recirculation ring 303 is a clockwise spiral type.

[0030] In the embodiment of the present invention, the fan blade 405 is a clockwise spiral type.

[0031] In the embodiment of the present invention, the transmission ring 404 is rotatably connected to the inner wall of the spray head 1 .

[0032] In the present invention, when in use, the material 305 is inserted into the heating element 306, the heating element 306 melts the material 305, the motor 201 is turned on and rotated counterclockwise, the motor 201 drives the transmission rod 202 to rotate counterclockwise, the transmission rod 202 drives the extrusion ring 203 to rotate counterclockwise, because the extrusion ring 203 and the inner wall of the nozzle 1 are scraped against each other, the material 305 is prevented from adhering to the inner wall of the nozzle 1, and under the action of the extrusion ring 203, the material 305 is squeezed downward, the material 305 squeezes the small ball 207, the small ball 207 squeezes the spring 206 downward, the small ball 207 drives the magnet 1 205 and the magnet 2 208 to adsorb, and the nozzle 1 can discharge the material downward. Due to the downward extrusion force, the use plays a role in preventing the material from flowing back. The adsorption force of the magnet can reduce the assistance of discharging and reduce the burden of the motor 201.

[0033] When the discharge stops, the spring 206 overcomes the interaction force of the magnet and drives the ball 207 to move upward, and the ball 207 contacts the fixing ring 204 to prevent impurities from returning to the inside of the nozzle 1, thereby preventing impurities.

[0034] When too much material 305 is accumulated, the material 305 enters the reflux channel 1 302 through the pipe 301, the extrusion ring drives the disc, and the disc drives the reflux ring 303 to rotate counterclockwise, and the reflux ring 303 drives the material 305 to move upward and reflux, and the material 305 passes upward through the reflux channel 2 304 into the middle cavity, which prevents the material 305 from cooling and condensing.

[0035] The disc drives the inner gear ring 401 to rotate counterclockwise, the inner gear ring 401 drives the gear 402 to rotate, the gear 402 drives the outer gear ring 403 to rotate, the outer gear ring 403 drives the transmission ring 404 to rotate, the transmission ring 404 drives the fan blades 405 to rotate, the fan blades 405 drive the air upward, so that the extruded material 305 vaporized products and dust impurities are carried upward and collected through the dust suction channel 406, thereby playing a dust suction role.

[0036] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A 3D printer with a material backflow prevention structure, comprising a nozzle (1), characterized in that: An extrusion mechanism (2) is provided on the inner wall of the nozzle (1), and the extrusion mechanism (2) comprises: A motor (201), wherein a housing of the motor (201) is fixed on the inner wall of the nozzle (1); A transmission rod (202), to which the output shaft of the motor (201) is fixed; An extrusion ring (203), the surface of the transmission rod (202) being fixed to the extrusion ring (203); A fixing ring (204), wherein a fixing ring (204) is fixed on the inner wall of the nozzle (1); Magnet one (205), a magnet one (205) is fixed on the inner wall of the nozzle (1); A spring (206), wherein the top of the first magnet (205) is fixed to one end of the spring (206); A small ball (207), wherein one end of the spring (206) away from the magnet (205) is fixed to the small ball (207); Magnet 2 (208), a magnet 2 (208) is fixed to the bottom of the small ball (207).

2. A 3D printer with a material backflow prevention structure as claimed in claim 1, characterized in that: A reflux mechanism (3) is provided on the inner wall of the nozzle (1), the reflux mechanism (3) comprising a pipe (301), the inner wall of the nozzle (1) is fixed to the pipe (301), a reflux channel 1 (302) is provided on the inner wall of the nozzle (1), a reflux channel 2 (304) is provided on the inner wall of the nozzle (1), a material (305) is placed on the top of the nozzle (1), and the top of the nozzle (1) is fixed to a heating element (306).

3. A 3D printer with a material backflow prevention structure as claimed in claim 1, characterized in that: The inner wall of the nozzle (1) is provided with a dust suction mechanism (4), the dust suction mechanism (4) comprises an inner gear ring (401), a disc is fixed on the top of the extrusion ring (203), the inner gear ring (401) is fixed on the top of the disc, a gear (402) is fixed on the inner wall of the nozzle (1), the inner wall of the nozzle (1) is rotatably connected to the outer gear ring (403), the bottom of the outer gear ring (403) is fixed to a transmission ring (404), a fan blade (405) is fixed on the surface of the transmission ring (404), and a dust suction channel (406) is fixed on the top of the nozzle (1).

4. A 3D printer with a material backflow prevention structure as claimed in claim 1, characterized in that: The extrusion ring (203) is of a counterclockwise spiral type, the extrusion ring (203) contacts the inner wall of the nozzle (1), a through hole is provided in the middle of the fixing ring (204), a groove is provided at the top of the magnet one (205), and the magnet two (208) is of a cylindrical type.

5. A 3D printer with a material backflow prevention structure as claimed in claim 2, characterized in that: The reflux channel 1 (302) is annular.

6. A 3D printer with a material backflow prevention structure as claimed in claim 2, characterized in that: The pipeline (301) connects the inner cavity where the extrusion ring (203) is located with the first reflux channel (302).

7. A 3D printer with a material backflow prevention structure as claimed in claim 2, characterized in that: The reflux ring (303) is a clockwise spiral type.

8. A 3D printer with a material backflow prevention structure as claimed in claim 3, characterized in that: The fan blades (405) are of a clockwise spiral type.

9. A 3D printer with a material backflow prevention structure as claimed in claim 3, characterized in that: The transmission ring (404) is rotatably connected to the inner wall of the spray head (1).

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