Powder spreading mechanism for a 3D printing device

Abstract

The utility model relates to 3D printing technical field, and disclose a kind of powder laying mechanism for 3D printing equipment, including mounting bracket, and be provided with material laying device on the mounting bracket.The powder laying mechanism for 3D printing equipment, by setting installation shell, material guide pipe, trowel plate, first pivot, spiral conveying plate, material turning plate, second pivot, rack, gear, first pulley, second pulley and connecting block, motor drives discharge box to move to left side, trowel plate shovels up redundant metal powder, gear rolls along the outer surface of rack, and redundant metal powder is pushed to material guide pipe inside, using first pulley and second pulley, second pivot drives first pivot rotation, so that spiral conveying plate discharges metal powder forward;By setting discharge box, hydraulic rod, connecting rod and cover plate, control hydraulic rod elongation, facilitate metal powder to pour out powder laying;By setting motor and limit sliding block, start motor, control discharge box left and right movement material laying.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, specifically to a powder spreading mechanism for 3D printing equipment. Background Technology

[0002] In the 3D printing process, the powder spreading mechanism spreads layers of powder evenly on the printing bed as the base of the printing material.

[0003] Chinese patent disclosure CN108724723A discloses a powder spreading mechanism for 3D printing equipment. It includes a powder spreading machine housing, a control device, a material conveying device, and a fixing device. The control device is located inside the powder spreading machine housing on one side, the material conveying device is located on the upper surface inside the powder spreading machine housing, and the fixing device is located on one side of the powder spreading machine housing. The control device includes a control box, a chip board, a control chip, a universal serial bus, and a power switch. The material conveying device includes a material bin, a powder conveying pipe, a DC solenoid valve, a servo motor, a motor drive chip, and a screw rod. The fixing device includes a fixing bracket, an electromagnet, and a melting frame. The control box is located inside the powder spreading machine housing on one side. The advantages are: this invention can achieve fully automatic powder spreading operation for 3D printers. The powder conveying operation uses a rotating screw rod to uniformly process the powder during transport, preventing powder blockage, resulting in high powder spreading efficiency and maintenance-free operation.

[0004] However, it still has the following drawbacks: the device controls the opening of the solenoid valve to spread powder, but the weight of the metal powder inside the material box changes in real time, resulting in different discharge speeds from the powder conveying pipe. The device does not even out the powder, leading to inconsistent powder thickness and affecting print quality. Therefore, we propose a powder spreading mechanism for 3D printing equipment to solve this problem. Utility Model Content

[0005] The purpose of this invention is to provide a powder spreading mechanism for 3D printing equipment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a powder spreading mechanism for a 3D printing equipment, including a mounting frame, on which a material spreading device is provided, and the material spreading device includes a material discharging section;

[0007] The discharge section includes a motor and a discharge box. The right end face of the mounting frame is fixedly connected to the left end face of the motor. A cover plate is hinged to the outer surface of the discharge box.

[0008] The mounting bracket is provided with a smoothing section;

[0009] The smoothing part includes a mounting shell, a second rotating shaft, a first rotating shaft, and a guide tube. The outer surface of the rear end of the second rotating shaft rotates through the inner wall of the mounting shell via a first bearing and extends to the rear of the mounting frame. The outer surface of the rear end of the first rotating shaft rotates through the inner wall of the guide tube via a second bearing and extends to the rear of the mounting frame.

[0010] A further improvement is that the discharge section also includes a limiting slider, a hydraulic rod, and a connecting rod. The top end of the hydraulic rod is hinged to the left end face of the discharge box, and the bottom end of the hydraulic rod output rod is rotatably sleeved on the outer surface of the connecting rod through a third bearing. The bottom surface of the connecting rod is fixedly connected to the top surface of the cover plate. By setting up the hydraulic rod, the cover plate, and the connecting rod, it is convenient to control the discharge of the device.

[0011] A further improvement is that a limiting groove is provided on the outer surface of the mounting frame, and the outer surface of the motor output shaft rotates through the right end face of the mounting frame and extends into the interior of the mounting frame via a fourth bearing. The limiting slider is threaded onto the outer surface of the motor output shaft, and the front of the limiting slider is fixedly connected to the back of the feeding box. By setting the motor and the limiting slider, it is easy to control the left and right movement of the feeding box to spread the metal powder.

[0012] A further improvement is that the smoothing section also includes a smoothing plate, a spiral conveyor plate, a turning plate, a rack, a gear, a first pulley, a second pulley, and a connecting block. The outer surface of the connecting block is fixedly connected to the outer surface of the feeding box, the outer surface of the connecting block is fixedly connected to the top surface of the mounting shell, and the outer surface of the smoothing plate is fixedly connected to the outer surface of the mounting shell. Smoothing is achieved by applying metal powder.

[0013] A further improvement is that the gear is fixedly sleeved on the outer surface of the second rotating shaft, the front of the rack is fixedly connected to the back of the mounting bracket, and the outer surface of the flipping plate is fixedly connected to the outer surface of the second rotating shaft. By setting the second rotating shaft, the flipping plate, the gear, and the rack, the gear rolls along the outer surface of the rack, causing the flipping plate to pour excess material into the mounting housing.

[0014] A further improvement is that the outer surface of the guide tube is fixedly connected to the outer surface of the mounting shell, and a discharge hole is opened on the front of the guide tube. By setting the guide shell, it is convenient to store and guide excess metal powder.

[0015] A further improvement is that the spiral conveying plate and the second pulley are both fixedly sleeved on the outer surface of the first rotating shaft, and the first pulley is fixedly sleeved on the outer surface of the second rotating shaft. The outer surfaces of the first pulley and the second pulley are connected by a belt drive. By setting the first pulley, the second pulley, the first rotating shaft, and the spiral conveying plate, excess metal powder can be guided to the front of the device for subsequent collection.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The powder spreading mechanism used in this 3D printing equipment, by setting up a mounting shell, a guide tube, a smearing plate, a first rotating shaft, a spiral conveyor plate, a tilting plate, a second rotating shaft, a rack, a gear, a first pulley, a second pulley, and a connecting block, when the motor drives the feeding box to move to the left, the smearing plate scoops up excess metal powder, the gear rolls along the outer surface of the rack, pushing the excess metal powder into the guide tube, and using the first and second pulleys, the second rotating shaft drives the first rotating shaft to rotate, so that the spiral conveyor plate discharges the metal powder forward; by setting up a feeding box, a hydraulic rod, a connecting rod, and a cover plate, the extension of the hydraulic rod is controlled to facilitate the pouring out of the metal powder for spreading; by setting up a motor and a limit slider, the motor is started to control the left and right movement of the feeding box for spreading. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the material spreading device of this utility model;

[0018] Figure 2 This is a partial sectional view of the three-dimensional structure of the material spreading device of this utility model;

[0019] Figure 3 This is a left-side sectional view of the three-dimensional structure of the material spreading device of this utility model;

[0020] Figure 4 This is a partial structural diagram of the material spreading device of this utility model;

[0021] Figure 5 This is an exploded view of a partial structure of the material spreading device of this utility model.

[0022] In the diagram: 1. Mounting frame; 2. Material spreading device; 21. Discharge section; 22. Smoothing section; 211. Motor; 212. Limiting slider; 213. Discharge box; 214. Hydraulic rod; 215. Connecting rod; 216. Cover plate; 221. Mounting shell; 222. Guide pipe; 223. Smoothing plate; 224. First rotating shaft; 225. Spiral conveyor plate; 226. Tilting plate; 227. Second rotating shaft; 228. Rack; 229. Gear; 220. First pulley; 201. Second pulley; 202. Connecting block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5The present invention provides a technical solution: a powder spreading mechanism for 3D printing equipment, including a mounting frame 1, a material spreading device 2 on the mounting frame 1, and the material spreading device 2 including a material discharging part 21;

[0025] The discharge section 21 includes a motor 211 and a discharge box 213. The right end face of the mounting frame 1 is fixedly connected to the left end face of the motor 211. A cover plate 216 is hinged to the outer surface of the discharge box 213. The discharge section 21 also includes a limiting slider 212, a hydraulic rod 214 and a connecting rod 215.

[0026] A limiting groove is provided on the outer surface of the mounting bracket 1. The outer surface of the output shaft of the motor 211 rotates through the right end face of the mounting bracket 1 via the fourth bearing and extends into the interior of the mounting bracket 1.

[0027] The top end of the hydraulic rod 214 is hinged to the left end face of the feeding box 213. The bottom end of the output rod of the hydraulic rod 214 is rotatably sleeved on the outer surface of the connecting rod 215 through the third bearing. The bottom surface of the connecting rod 215 is fixedly connected to the top surface of the cover plate 216. By setting the feeding box 213, the hydraulic rod 214, the connecting rod 215 and the cover plate 216, the extension of the hydraulic rod 214 is controlled, which facilitates the pouring out and spreading of metal powder.

[0028] The limiting slider 212 is threaded onto the outer surface of the output shaft of the motor 211. The front of the limiting slider 212 is fixedly connected to the back of the feeding box 213. By setting the motor 211 and the limiting slider 212, the motor 211 is started, and the feeding box 213 is controlled to move left and right to spread the material.

[0029] The mounting bracket 1 is provided with a smoothing part 22;

[0030] The smoothing section 22 includes a mounting shell 221, a second rotating shaft 227, a first rotating shaft 224, and a guide tube 222. The outer surface of the rear end of the second rotating shaft 227 rotates through the inner wall of the mounting shell 221 via a first bearing and extends to the rear of the mounting frame 1. The outer surface of the rear end of the first rotating shaft 224 rotates through the inner wall of the guide tube 222 via a second bearing and extends to the rear of the mounting frame 1. The smoothing section 22 also includes a smoothing plate 223, a spiral conveyor plate 225, a turning plate 226, a rack 228, a gear 229, a first pulley 220, a second pulley 201, and a connecting block 202.

[0031] The spiral conveyor plate 225 and the second pulley 201 are both fixedly sleeved on the outer surface of the first rotating shaft 224, the gear 229 is fixedly sleeved on the outer surface of the second rotating shaft 227, the front of the rack 228 is fixedly connected to the back of the mounting frame 1, and the outer surface of the flipping plate 226 is fixedly connected to the outer surface of the second rotating shaft 227.

[0032] The outer surface of the connecting block 202 is fixedly connected to the outer surface of the feeding box 213, the outer surface of the connecting block 202 is fixedly connected to the top surface of the mounting shell 221, and the outer surface of the smearing plate 223 is fixedly connected to the outer surface of the mounting shell 221.

[0033] The outer surface of the guide tube 222 is fixedly connected to the outer surface of the mounting shell 221, and the front of the guide tube 222 is provided with a discharge hole.

[0034] The first pulley 220 is fixedly sleeved on the outer surface of the second rotating shaft 227. The outer surfaces of the first pulley 220 and the second pulley 201 are connected by belt drive. By setting up the mounting shell 221, the guide tube 222, the smearing plate 223, the first rotating shaft 224, the spiral conveyor plate 225, the tipping plate 226, the second rotating shaft 227, the rack 228, the gear 229, the first pulley 220, the second pulley 201, and the connecting block 202, when the motor 211 drives the discharge box 213 to move to the left, the smearing plate 223 scoops up the excess metal powder, and the gear 229 rolls along the outer surface of the rack 28, pushing the excess metal powder into the guide tube 222. Using the first pulley 220 and the second pulley 201, the second rotating shaft 227 drives the first rotating shaft 224 to rotate, so that the spiral conveyor plate 225 discharges the metal powder forward.

[0035] In use, the initial position of the feeding box 213 is set at the left end of the mounting frame 1. The motor 211 is started, and its output shaft drives the limit slider 212 to move to the right. Simultaneously, the hydraulic rod 214 extends, causing the cover plate 216 to open downwards, allowing the powder inside the feeding box 213 to fall. When the feeding box 213 moves to the right end of the mounting frame 1, the hydraulic rod 214 shortens, causing the output shaft of the motor 211 to reverse. The gear 229 rolls along the outer surface of the rack 228, driving the second... Rotating shaft 227 and tipping plate 226 rotate, and using first pulley 220 and second pulley 201, second rotating shaft 227 drives first rotating shaft 224 to rotate. First rotating shaft 224 drives spiral conveyor plate 225 to rotate. Scraping plate 223 scoops up excess powder. When too much metal powder accumulates on scraping plate 223, the metal powder enters the mounting shell 221. Tipping plate 226 pushes the metal powder into guide tube 222. Spiral conveyor plate 225 pushes the metal powder forward.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder spreading mechanism for a 3D printing device, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a material spreading device (2), which includes a material discharging part (21). The discharge section (21) includes a motor (211) and a discharge box (213). The right end face of the mounting bracket (1) is fixedly connected to the left end face of the motor (211). A cover plate (216) is hinged to the outer surface of the discharge box (213). The mounting bracket (1) is provided with a smoothing part (22); The smoothing part (22) includes a mounting shell (221), a second rotating shaft (227), a first rotating shaft (224), and a guide tube (222). The outer surface of the rear end of the second rotating shaft (227) rotates through the inner wall of the mounting shell (221) via the first bearing and extends to the rear of the mounting frame (1). The outer surface of the rear end of the first rotating shaft (224) rotates through the inner wall of the guide tube (222) via the second bearing and extends to the rear of the mounting frame (1).

2. The powder spreading mechanism for a 3D printing device according to claim 1, characterized in that: The discharge section (21) also includes a limiting slider (212), a hydraulic rod (214) and a connecting rod (215). The top end of the hydraulic rod (214) is hinged to the left end face of the discharge box (213). The bottom end of the output rod of the hydraulic rod (214) is rotated and sleeved on the outer surface of the connecting rod (215) through a third bearing. The bottom surface of the connecting rod (215) is fixedly connected to the top surface of the cover plate (216).

3. The powder spreading mechanism for a 3D printing device according to claim 2, characterized in that: The mounting bracket (1) has a limiting through groove on its outer surface. The outer surface of the output shaft of the motor (211) rotates through the right end face of the mounting bracket (1) and extends into the interior of the mounting bracket (1) via the fourth bearing. The limiting slider (212) is threaded onto the outer surface of the output shaft of the motor (211). The front of the limiting slider (212) is fixedly connected to the back of the feeding box (213).

4. The powder spreading mechanism for a 3D printing device according to claim 1, characterized in that: The smoothing section (22) further includes a smoothing plate (223), a spiral conveyor plate (225), a turning plate (226), a rack (228), a gear (229), a first pulley (220), a second pulley (201), and a connecting block (202). The outer surface of the connecting block (202) is fixedly connected to the outer surface of the feeding box (213), the outer surface of the connecting block (202) is fixedly connected to the top surface of the mounting shell (221), and the outer surface of the smoothing plate (223) is fixedly connected to the outer surface of the mounting shell (221).

5. The powder spreading mechanism for a 3D printing device according to claim 4, characterized in that: The gear (229) is fixedly sleeved on the outer surface of the second rotating shaft (227), the front of the rack (228) is fixedly connected to the back of the mounting bracket (1), and the outer surface of the flipping plate (226) is fixedly connected to the outer surface of the second rotating shaft (227).

6. The powder spreading mechanism for a 3D printing device according to claim 4, characterized in that: The outer surface of the guide tube (222) is fixedly connected to the outer surface of the mounting shell (221), and the front of the guide tube (222) has a discharge hole.

7. The powder spreading mechanism for a 3D printing device according to claim 4, characterized in that: The spiral conveyor plate (225) and the second pulley (201) are both fixedly sleeved on the outer surface of the first rotating shaft (224), and the first pulley (220) is fixedly sleeved on the outer surface of the second rotating shaft (227). The outer surfaces of the first pulley (220) and the second pulley (201) are connected by belt drive.

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