Extrusion structure applied to 3D printer

Abstract

The invention discloses an extrusion structure applied to a 3D printer, and relates to the technical field of auxiliary structures of 3D printers, the extrusion structure comprises a stepping motor, the right side of the stepping motor is movably connected with an extruder base, the right side of the extruder base is movably connected with an extruder cover, and the inner wall of the extruder base is movably connected with a second countersunk head; and the extruder base is detachably connected to the right side of the stepping motor through a second countersunk head, a cup head is movably connected to the inner wall of the extruder cover, the extruder cover is detachably connected to the right side of the extruder base through the cup head, and a first bearing is fixedly installed on the inner wall of the extruder base. Through the cooperative design of all the structures, the pressing and pulling handle can be achieved by arranging a set of parts on the left side and the right side, only the sliding block needs to be rotated by 180 degrees, then the extruder cover needs to be rotated by 180 degrees for installation, the problem that a set of parts need to be manufactured on each of the left side and the right side is solved, and the production cost of the structure is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printer auxiliary structures, and in particular to an extrusion structure applied to a 3D printer. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis, uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. 3D printing is usually achieved using digital technology material printers. It is often used to make models in the fields of mold manufacturing, industrial design, etc., and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology. This technology is used in jewelry, footwear, industrial design, architecture, engineering and construction, automobiles, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms and other fields. The interior of the 3D printer is equipped with an extrusion structure.

[0003] A Chinese patent discloses an extrusion structure for a 3D printer, with the publication number CN 207105638 U. The technical solution disclosed in the patent document is as follows: it includes a feeding device, a first cooling fan is installed at the front end of the feeding device, a mounting plate is fixedly connected to the bottom of the feeding device, a second cooling fan is installed at the upper end of the mounting plate, a ventilation pipe is installed at the lower end of the mounting plate, a peek tube is connected to the center of the front side of the lower end of the feeding device, a nozzle is installed at the lower end of the peek tube, and a heating block is installed on the outer surface of the nozzle.

[0004] In order to solve the problem that the existing extrusion structure is prone to clogging in actual work, the existing technology uses a peek tube instead of a throat to reduce the blockage caused by the material melting due to heat in the peek tube. However, the push-pull handle is inconvenient to use. When the existing structure is actually used, there will be a push-pull handle on the left extruder and a push-pull handle on the right extruder. A set of parts must be manufactured separately, which leads to a high cost problem of the extrusion structure. Summary of the invention

[0005] The present invention provides an extrusion structure applied to a 3D printer to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: An extrusion structure applied to a 3D printer comprises a stepper motor, wherein the right side of the stepper motor is movably connected to an extruder base, the right side of the extruder base is movably connected to an extruder cover, a No. 2 countersunk head is movably connected to the inner wall of the extruder base, the extruder base is detachably connected to the right side of the stepper motor via the No. 2 countersunk head, a cup head is movably connected to the inner wall of the extruder cover, the extruder cover is detachably connected to the right side of the extruder base via the cup head, a No. 1 bearing is fixedly mounted on the inner wall of the extruder base, a reduction gear is rotatably connected to the inner wall of the No. 1 bearing, the output shaft of the stepper motor is fixedly connected to a motor gear, and the top of the motor gear is meshed with the bottom of the reduction gear.

[0007] A further improvement of the technical solution of the present invention is that a transmission gear is fixedly connected to the right side of the reduction gear, a sliding block is detachably connected to the right side of the extruder seat, a No. 1 countersunk head is detachably connected to the inner wall of the sliding block, the number of the transmission gears is set to two, the two transmission gears are meshed in the front-to-back direction, a needle bearing is fixedly installed on the inner wall of the sliding block, and the transmission gear located on the back is rotatably connected to the inner wall of the needle bearing.

[0008] A further improvement of the technical solution of the present invention is that a No. 2 bearing is detachably connected to the inner wall of the extruder cover, the transmission gear located at the front is rotatably connected to the inner wall of the No. 2 bearing, the top and bottom of the extruder cover are fixedly connected to pneumatic joints, and a mold spring is detachably connected to the inner wall of the extruder cover.

[0009] A further improvement of the technical solution of the present invention is that the material of the reduction gear is set to aluminum alloy, the number of teeth of the reduction gear is set to forty-eight, the material of the motor gear is set to aluminum alloy, and the number of teeth of the motor gear is set to sixteen.

[0010] A further improvement of the technical solution of the present invention is that a motor heat dissipation mechanism is provided on the top of the stepper motor, and the motor heat dissipation mechanism includes a ferroalloy hollow shell fixedly connected to the top of the stepper motor, a movable frame is movably inserted on the inner wall of the ferroalloy hollow shell, a nylon mesh plate is fixedly installed on the inner wall of the movable frame, a magnetic block is fixedly installed on the outer wall of the movable frame, the bottom of the magnetic block is movably connected to the top of the ferroalloy hollow shell, a circular through hole is opened at the bottom of the ferroalloy hollow shell, the nylon mesh plate is used for fine filtering of air to ensure the safety of the internal components of the stepper motor, and the design of the magnetic block makes it convenient for users to disassemble the movable frame.

[0011] A further improvement of the technical solution of the present invention lies in that a refrigeration mechanism is arranged on the back of the ferroalloy hollow shell, an extrudate cooling mechanism is arranged on the front of the ferroalloy hollow shell, the extrudate cooling mechanism comprises a manual valve tube, the manual valve tube is fixedly connected to the front of the ferroalloy hollow shell, a gooseneck tube is fixedly connected to the front of the manual valve tube, and the design of the gooseneck tube facilitates users to customize the position of the hollow frame.

[0012] A further improvement of the technical solution of the present invention is that: the end of the gooseneck tube away from the manual valve tube is fixedly connected to a hollow socket tube, the side of the hollow socket tube away from the gooseneck tube is fixedly connected to an extension circular tube, the end of the extension circular tube away from the hollow socket tube is fixedly connected to a hollow frame, and a stainless steel mesh cover is fixedly connected to the inner wall of the hollow frame. The stainless steel mesh cover can process the air evenly and avoid the problem of high wind speed affecting the normal output of materials.

[0013] A further improvement of the technical solution of the present invention is that the refrigeration mechanism includes a cylindrical fan body fixedly connected to the back of an iron alloy hollow shell, a stainless steel connecting frame is fixedly connected to the back of the cylindrical fan body, a semiconductor refrigeration plate is fixedly installed on the outer wall of the stainless steel connecting frame, a limiting block is welded on the inner wall of the stainless steel connecting frame, a porous plate is movably connected to the inner wall of the stainless steel connecting frame, the porous plate is used for primary filtration of air, and the limiting block is used for movably limiting the porous plate.

[0014] A further improvement of the technical solution of the present invention is that a heat exchange strip is fixedly connected to the inner wall of the stainless steel connecting frame, graphene teeth are fixedly connected to the inner wall of the heat exchange strip, and heat exchange fins are welded on the outer wall of the heat exchange strip. Through the design of graphene teeth and heat exchange fins, the heat exchange rate of the heat exchange strip is improved, and the cooling effect of the semiconductor refrigeration plate on the air is increased.

[0015] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: 1. The present invention provides an extrusion structure for a 3D printer. The push-pull handle of the structure can be realized by a set of parts on the left and the right. It only needs to rotate the sliding block 180 degrees and then rotate the extruder cover 180 degrees for installation, thereby avoiding the problem of manufacturing a set of parts on both the left and the right, and reducing the production cost of the structure.

[0016] 2. The present invention provides an extrusion structure applied to a 3D printer. The push-pull handle of the present design is hidden, simple and beautiful, and will not affect the operation and use of the machine. It avoids the problem that the protruding push-pull handle is unsightly and sometimes affects the normal operation and use of the machine, and is convenient for the promotion and use of the present structure.

[0017] 3. The present invention provides an extrusion structure applied to a 3D printer. Through the design of a cylindrical fan body, external air can be drawn in, and the air is filtered by a porous plate and a nylon mesh plate. The air can be cooled by the design of a stainless steel connecting frame, a semiconductor refrigeration plate and a heat exchange strip. The filtered low-temperature air then enters the inner cavity of the stepper motor from the circular through hole, and the original hot air in the inner cavity of the stepper motor is replaced through the gap of the stepper motor housing, thereby realizing the function of heat dissipation of the components inside the stepper motor and extending the overall service life of the stepper motor.

[0018] 4. The present invention provides an extrusion structure applied to a 3D printer. Through the design of a gooseneck tube, the user can arbitrarily adjust the position of the hollow frame so that the material can be output through the inner side of the hollow frame. Through the cooperation of the manual valve tube and the gooseneck tube, part of the filtered low-temperature air can be transferred to the inner cavity of the hollow frame. The air is then evenly blown toward the passing material through the stainless steel mesh cover, cooling the material to a certain extent, avoiding the problem of the printed material having too high a temperature affecting the stability of the product, thereby improving the reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structural decomposition of the present invention; Figure 3 It is an enlarged schematic diagram of structure A of the present invention; Figure 4 It is a schematic diagram of the side structure of the extruder cover of the present invention; Figure 5 It is a schematic diagram of the cutaway structure of the ferroalloy hollow shell of the present invention; Figure 6 It is a schematic diagram of the exploded structure of the cylindrical fan body and the stainless steel connecting frame of the present invention; Figure 7 It is a structural schematic diagram of the hollow frame of the present invention; Figure 8 It is a schematic diagram of the cross-section structure of the heat exchange strip of the present invention.

[0020] In the figure: 1. Stepper motor; 2. Extruder base; 3. No. 1 bearing; 4. Reduction gear; 5. Motor gear; 6. Sliding block; 7. Transmission gear; 8. Needle bearing; 9. No. 1 countersunk head; 10. Extruder cover; 11. No. 2 bearing; 12. No. 2 countersunk head; 13. Cup head; 14. Pneumatic joint; 15. Mold spring; 21. Motor heat dissipation mechanism; 211. Iron alloy hollow housing; 212. Movable frame; 213. Magnetic block; 214. Nylon mesh plate; 215. Round through hole; 22. Extrusion material cooling mechanism; 221. Manual valve pipe; 222. Gooseneck pipe; 223. Hollow receiving pipe; 224. Extended round pipe; 225. Hollow frame; 226. Stainless steel mesh cover; 23. Refrigeration mechanism; 231. Cylindrical fan body; 232. Stainless steel connecting frame; 233. Semiconductor refrigeration plate; 234. Limit block; 235. Perforated plate; 236. Heat exchange strip; 237. Graphene tooth; 238. Heat exchange fin. Implementation

[0021] The present invention is further described in detail below in conjunction with embodiments: Example

[0022] like Figure 1-8 As shown, the present invention provides an extrusion structure for a 3D printer, comprising a stepper motor 1, an extruder base 2 is movably connected to the right side of the stepper motor 1, an extruder cover 10 is movably connected to the right side of the extruder base 2, a second countersunk head 12 is movably connected to the inner wall of the extruder base 2, the extruder base 2 is detachably connected to the right side of the stepper motor 1 through the second countersunk head 12, a cup head 13 is movably connected to the inner wall of the extruder cover 10, the extruder cover 10 is detachably connected to the right side of the extruder base 2 through the cup head 13, and the inner wall of the extruder base 2 is fixed A No. 1 bearing 3 is fixedly installed, and a reduction gear 4 is rotatably connected to the inner wall of the No. 1 bearing 3. The output shaft of the stepper motor 1 is fixedly connected to the motor gear 5. The top of the motor gear 5 is meshed with the bottom of the reduction gear 4. The model of the stepper motor 1 is set to 4248 motor, the material of the extruder base 2 is set to aluminum alloy, and the model of the No. 1 bearing 3 is set to MR83ZZ. The push-pull handle of this structure can be realized with a set of parts on the left and the right. It only needs to rotate the sliding block 6 180 degrees, and then rotate the extruder cover 10 180 degrees for installation. Example

[0023] like Figure 1-8As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, a transmission gear 7 is fixedly connected to the right side of the reduction gear 4, a sliding block 6 is detachably connected to the right side of the extruder base 2, a No. 1 countersunk head 9 is detachably connected to the inner wall of the sliding block 6, the number of transmission gears 7 is set to two, the two transmission gears 7 are meshed in the front-to-back direction, a needle bearing 8 is fixedly installed on the inner wall of the sliding block 6, the transmission gear 7 located on the back side is rotatably connected to the inner wall of the needle bearing 8, a No. 2 bearing 11 is detachably connected to the inner wall of the extruder cover 10, the transmission gear 7 located on the front side is rotatably connected to the inner wall of the No. 2 bearing 11, the top and bottom of the extruder cover 10 are fixedly connected to the pneumatic joint 14, the extruder cover 1 0 is detachably connected to a mold spring 15, the material of the reduction gear 4 is set to aluminum alloy, the number of teeth of the reduction gear 4 is set to forty-eight, the material of the motor gear 5 is set to aluminum alloy, the number of teeth of the motor gear 5 is set to sixteen, the material of the sliding block 6 is set to aluminum alloy, the specification of the needle bearing 8 is set to 3X5X7, the specification of the No. 1 countersunk head 9 is set to M3X20, the material of the extruder cover 10 is set to aluminum alloy, the model of the No. 2 bearing 11 is set to MR83, the specification of the No. 2 countersunk head 12 is set to M3X10, the specification of the cup head 13 is set to M3X28, and the model of the pneumatic joint 14 is selected to be PC8M10. The push-pull handle of this design is hidden, simple and beautiful, and will not affect the operation and use of the machine. Example

[0024] like Figure 1-8 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, a motor heat dissipation mechanism 21 is provided on the top of the stepper motor 1, and the motor heat dissipation mechanism 21 includes a ferroalloy hollow shell 211 fixedly connected to the top of the stepper motor 1, a movable frame 212 is movably inserted on the inner wall of the ferroalloy hollow shell 211, a nylon mesh plate 214 is fixedly installed on the inner wall of the movable frame 212, a magnetic block 213 is fixedly installed on the outer wall of the movable frame 212, the bottom of the magnetic block 213 is movably connected to the top of the ferroalloy hollow shell 211, a circular through hole 215 is opened at the bottom of the ferroalloy hollow shell 211, and a refrigeration mechanism 23 is provided on the back of the ferroalloy hollow shell 211. The front of the ferroalloy hollow shell 211 is provided with an extruded material cooling mechanism 22, and the extruded material cooling mechanism 22 includes a manual valve tube 221, and the manual valve tube 221 is fixedly connected to the front of the ferroalloy hollow shell 211, and a gooseneck tube 222 is fixedly connected to the front of the manual valve tube 221. The magnetic block 213 is connected to the top of the ferroalloy hollow shell 211 by magnetic adsorption. According to this design, it is convenient for users to disassemble the movable frame 212 and clean the nylon mesh plate 214. The nylon mesh plate 214 is used to fully filter the cooled air. The top of the stepper motor 1 shell is provided with a hole corresponding to the circular through hole 215 to facilitate the entry of heat dissipation air. Example

[0025] like Figure 1-8 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the end of the gooseneck tube 222 away from the manual valve tube 221 is fixedly connected to the hollow receiving tube 223, the side of the hollow receiving tube 223 away from the gooseneck tube 222 is fixedly connected to the extension tube 224, the end of the extension tube 224 away from the hollow receiving tube 223 is fixedly connected to the hollow frame 225, the inner wall of the hollow frame 225 is fixedly connected to the stainless steel mesh cover 226, the refrigeration mechanism 23 includes a cylinder fixedly connected to the back of the ferroalloy hollow shell 211 The back of the cylindrical fan body 231 is fixedly connected with a stainless steel connecting frame 232, a semiconductor refrigeration plate 233 is fixedly installed on the outer wall of the stainless steel connecting frame 232, a limited block 234 is welded on the inner wall of the stainless steel connecting frame 232, a porous plate 235 is movably connected to the inner wall of the stainless steel connecting frame 232, a heat exchange strip 236 is fixedly connected to the inner wall of the stainless steel connecting frame 232, a graphene tooth 237 is fixedly connected to the inner wall of the heat exchange strip 236, and a graphene tooth 237 is welded on the outer wall of the heat exchange strip 236. The heat exchange fin 238, the user can manually bend and adjust the gooseneck tube 222 in advance, move the position of the hollow frame 225 as a whole, so that the material of the printer is output through the inner side of the hollow frame 225, and manually control the manual valve tube 221 to open, and the filtered low-temperature air can be output from the stainless steel mesh cover 226, and the output high-temperature material can be cooled to a certain extent to avoid the problem that the temperature of the printed material is too high and affects the stability of the product, thereby ensuring the quality of the printed product, and controlling the operation of the cylindrical fan body 231, which can be The back side absorbs air, and the design of the porous plate 235 can block larger impurities in the air to ensure the safety of the cylindrical fan body 231. The design of the limit block 234 can movably limit the porous plate 235, which is convenient for users to install or disassemble the porous plate 235. The design of the graphene teeth 237 can enable the heat exchange strip 236 to quickly absorb the temperature of the cold end of the semiconductor refrigeration plate 233, and the design of the heat exchange fins 238 can quickly transfer the above temperature to the inside of the air, thereby increasing the cooling effect of the air.

[0026] The following is a detailed description of the working principle of the extrusion structure used in 3D printers.

[0027] like Figure 1-8As shown, the sliding block 6 is rotated 180 degrees, and then the extruder cover 10 is rotated 180 degrees for installation, so as to achieve the effect of pressing and pulling the handle on the left and on the right as one set of parts. When the stepper motor 1 is running, the cylindrical fan body 231 and the semiconductor refrigeration plate 233 are controlled to work, and air is extracted and cooled. Then, the low-temperature air is filtered and treated with dust and temperature through the porous plate 235 and the nylon mesh plate 214. The air then passes through the circular through hole 215 and enters the inner cavity of the stepper motor 1, completing the heat dissipation protection treatment of the stepper motor 1. The gooseneck tube 222 is pre-bent, and the position of the hollow frame 225 is moved as a whole, so that the material is output through the inner side of the hollow frame 225. The manual valve tube 221 is manually controlled to be opened, and the filtered low-temperature air can be output from the stainless steel mesh cover 226, and the output high-temperature material is cooled to a certain extent.

[0028] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An extrusion structure for a 3D printer, comprising a stepping motor (1), characterized in that: The right side of the stepper motor (1) is movably connected to an extruder base (2), the right side of the extruder base (2) is movably connected to an extruder cover (10), a No. 2 countersunk head (12) is movably connected to the inner wall of the extruder base (2), the extruder base (2) is detachably connected to the right side of the stepper motor (1) via the No. 2 countersunk head (12), the inner wall of the extruder cover (10) is movably connected to a cup head (13), the extruder cover (10) is detachably connected to the right side of the extruder base (2) via the cup head (13), a No. 1 bearing (3) is fixedly mounted on the inner wall of the extruder base (2), a reduction gear (4) is rotatably connected to the inner wall of the No. 1 bearing (3), the output shaft of the stepper motor (1) is fixedly connected to a motor gear (5), the top of the motor gear (5) is meshed with the bottom of the reduction gear (4).

2. The extrusion structure for a 3D printer according to claim 1, characterized in that: The right side of the reduction gear (4) is fixedly connected to a transmission gear (7), the right side of the extruder seat (2) is detachably connected to a sliding block (6), the inner wall of the sliding block (6) is detachably connected to a No. 1 countersunk head (9), the number of the transmission gears (7) is set to two, the two transmission gears (7) are meshed in the front-to-back direction, a needle bearing (8) is fixedly installed on the inner wall of the sliding block (6), and the transmission gear (7) located at the back is rotatably connected to the inner wall of the needle bearing (8).

3. The extrusion structure for a 3D printer according to claim 2, characterized in that: A No. 2 bearing (11) is detachably connected to the inner wall of the extruder cover (10); the transmission gear (7) located at the front is rotatably connected to the inner wall of the No. 2 bearing (11); the top and bottom of the extruder cover (10) are fixedly connected to a pneumatic joint (14); and a mold spring (15) is detachably connected to the inner wall of the extruder cover (10).

4. The extrusion structure for a 3D printer according to claim 1, characterized in that: The material of the reduction gear (4) is set to be an aluminum alloy, and the number of teeth of the reduction gear (4) is set to be forty-eight; the material of the motor gear (5) is set to be an aluminum alloy, and the number of teeth of the motor gear (5) is set to be sixteen.

5. The extrusion structure for a 3D printer according to claim 1, characterized in that: A motor heat dissipation mechanism (21) is provided on the top of the stepper motor (1), and the motor heat dissipation mechanism (21) comprises a ferroalloy hollow shell (211) fixedly connected to the top of the stepper motor (1), a movable frame (212) is movably inserted on the inner wall of the ferroalloy hollow shell (211), a nylon mesh plate (214) is fixedly mounted on the inner wall of the movable frame (212), a magnetic block (213) is fixedly mounted on the outer wall of the movable frame (212), the bottom of the magnetic block (213) is movably connected to the top of the ferroalloy hollow shell (211), and a circular through hole (215) is provided on the bottom of the ferroalloy hollow shell (211).

6. The extrusion structure for a 3D printer according to claim 5, characterized in that: A refrigeration mechanism (23) is arranged on the back of the ferroalloy hollow shell (211), and an extruded material cooling mechanism (22) is arranged on the front of the ferroalloy hollow shell (211). The extruded material cooling mechanism (22) comprises a manual valve tube (221), and the manual valve tube (221) is fixedly connected to the front of the ferroalloy hollow shell (211). A gooseneck tube (222) is fixedly connected to the front of the manual valve tube (221).

7. The extrusion structure for a 3D printer according to claim 6, characterized in that: One end of the gooseneck tube (222) away from the manual valve tube (221) is fixedly connected to a hollow receiving tube (223); one side of the hollow receiving tube (223) away from the gooseneck tube (222) is fixedly connected to an extension tube (224); one end of the extension tube (224) away from the hollow receiving tube (223) is fixedly connected to a hollow frame (225); and a stainless steel mesh cover (226) is fixedly connected to the inner wall of the hollow frame (225).

8. The extrusion structure for a 3D printer according to claim 6, characterized in that: The refrigeration mechanism (23) comprises a cylindrical fan body (231) fixedly connected to the back of a hollow ferroalloy shell (211); a stainless steel connecting frame (232) is fixedly connected to the back of the cylindrical fan body (231); a semiconductor refrigeration plate (233) is fixedly mounted on the outer wall of the stainless steel connecting frame (232); a limiting block (234) is welded to the inner wall of the stainless steel connecting frame (232); and a porous plate (235) is movably connected to the inner wall of the stainless steel connecting frame (232).

9. The extrusion structure used in a 3D printer according to claim 8, characterized in that: A heat exchange strip (236) is fixedly connected to the inner wall of the stainless steel connection frame (232), graphene teeth (237) are fixedly connected to the inner wall of the heat exchange strip (236), and heat exchange fins (238) are welded to the outer wall of the heat exchange strip (236).

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