3D printing casting sand mold paving device

Abstract

The invention provides a 3D printing casting sand mold flattening device which comprises a support, first guide rails symmetrically distributed are arranged on the support, first guide sliding grooves are formed in the sides, close to the vertical center of the support, of the first guide rails correspondingly, a second guide rail is slidably arranged between the first guide sliding grooves, and a movable seat is slidably arranged in the second guide sliding groove formed in the lower surface of the second guide rail; a sliding frame is arranged at the bottom end of the movable base, sliding rods which are evenly distributed are arranged on the sliding frame in a sliding mode, a first sliding base is arranged between every two adjacent sliding rods, and first belt wheels which are symmetrically distributed are rotationally arranged on the outer sides of the first sliding bases through rotating shafts. By means of the 3D printing casting sand mold flattening device, large casting parts of different models can be rapidly and evenly flattened at a time, redundant molding sand can be pushed through the push plate during flattening, the flatness and uniformity of sand blasting can be effectively guaranteed, and the precision of the 3D printing casting sand mold can be effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, and particularly relates to a leveling device for 3D printing casting sand molds. Background Art

[0002] 3D printing casting sand molds is an advanced manufacturing technology that combines the advantages of additive manufacturing (AM) and traditional casting processes. Through 3D printing technology, complex sand molds or cores can be directly generated from digital models, greatly simplifying the mold-making process and enabling designs that are difficult to achieve with traditional methods. When 3D printing casting sand molds, a leveling device for 3D printing casting sand molds is required to level the molding sand.

[0003] In existing leveling devices for 3D printing casting sand molds, a high-precision nozzle sprays a liquid binder along a predetermined path to bond the sand grains in this area to form a solid structure. Then, one or more horizontally moving scrapers (also called rakes) or rollers are driven to evenly spread a thin layer of sand grains on the printing platform, and the scrapers or rollers move back and forth along the predetermined path to ensure a consistent sand layer thickness. However, when producing some large castings, it is necessary to level larger-sized molding sand. Since the specifications of the scrapers or rollers are fixed during leveling, the scrapers or rollers cannot quickly level the sprayed sand grains at one time and can only move in multiple partitions to level them. This may cause protrusions between two adjacent areas during leveling, which may affect the leveling effect of the sand mold, thereby affecting subsequent sandblasting bonding, the accuracy of 3D printing casting sand molds, and the production accuracy of castings. Summary of the Invention

[0004] In view of this, in order to overcome the deficiencies of the prior art, the present invention provides a leveling device for 3D printing casting sand molds, which can adapt to large castings of different models and quickly and evenly level them at one time. During leveling, the excess molding sand can be pushed by a push plate, which can effectively ensure the flatness and evenness of sandblasting, and can effectively ensure the accuracy of 3D printing casting sand molds.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A 3D printing casting sand mold paving device, including a bracket, on which symmetrically distributed guide rails 1 are provided. On one side of the guide rails 1 close to the vertical center of the bracket, guide chutes 1 are respectively opened. A guide rail 2 is slidably arranged between the guide chutes 1. An activity seat is slidably arranged in a guide chute 2 opened on the lower surface of the guide rail 2. A sliding frame is arranged at the bottom end of the activity seat. Uniformly distributed sliding rods are slidably arranged on the sliding frame. Between adjacent two sliding rods, sliding seats 1 are respectively arranged. On the outer sides of the sliding seats 1, symmetrically distributed pulley 1s are rotatably arranged through rotating shafts. Symmetrically distributed sliding cylinders are arranged on the sliding frame. Sliding columns are slidably arranged inside the sliding cylinders. A sliding seat 2 is arranged between the top ends of the sliding columns. Symmetrically distributed pulley 2s are rotatably arranged on the outer sides of the sliding seat 2 through rotating shafts. A paving belt is drivingly arranged between the pulley 1 and the pulley 2. Uniformly distributed material transfer plates are arranged on the outer side of the paving belt. An adjusting module for adjusting the distance between the pulley 1s is further arranged on the sliding frame. A moving module for driving the paving belt to move is arranged between the guide rail 1 and the guide rail 2; A return spring is arranged between the bottom end inside the sliding cylinder and the adjacent sliding column; A supporting seat is arranged on the lower surface of the sliding frame. A limiting belt is arranged in the middle of the side of the paving belt close to the sliding frame. The limiting belt is slidably connected with the supporting seat. Symmetrically distributed magnetic belts are arranged on the limiting belt. The magnetic belts are cooperatively installed with magnets arranged on the lower surface of the supporting seat.

[0006] As a further improvement of the present invention, a dual-axis motor 1 is arranged inside each of the sliding seats 1. The output shafts of the dual-axis motor 1 are respectively fixed to the adjacent rotating shafts through couplings.

[0007] As a further improvement of the present invention, the adjusting module includes a driving seat arranged in the middle inside the sliding frame. Symmetrically distributed driving rods are slidably arranged inside the driving seat. The driving rods are fixedly connected with the adjacent sliding seats 1. Symmetrically distributed adjusting screw rods 3 are rotatably arranged inside the driving seat. A dual-axis motor 2 is arranged in the middle inside the driving seat. The output shaft of the dual-axis motor 2 is fixed to the adjacent adjusting screw rod 3 through a coupling.

[0008] As a further improvement of the present invention, the moving module includes an adjusting screw rod 1 rotatably arranged inside the guide rail 1. The adjusting screw rod 1 is in threaded connection with the guide rail 2. Symmetrically distributed servo motors 1 are arranged on the bracket. The servo motors 1 are fixed to the adjusting screw rod 1 through couplings. Symmetrically distributed partition plates are arranged inside the guide rail 2. An adjusting screw rod 2 is rotatably arranged between the partition plates. The adjusting screw rod 2 is in threaded connection with the activity seat. A servo motor 2 is arranged inside the guide rail 2. The servo motor 2 is fixed to the adjusting screw rod 2 through a coupling.

[0009] As a further improvement of the present invention, a control board is arranged on the bracket. The dual-axis motor 1, the dual-axis motor 2, the servo motor 1 and the servo motor 2 are all electrically connected to the control board.

[0010] As a further improvement of the present invention, the lower surface of the bracket is provided with uniformly distributed supporting feet, and mounting holes are formed in the lower surfaces of the supporting feet.

[0011] In summary, compared with the prior art, the present application has at least the following beneficial technical effects:

[0012] First, the control board drives the first dual-axis motor connected thereto to rotate, and then drives the leveling belt disposed between the first pulley and the second pulley to rotate through the rotation of the first pulley. When the leveling belt moves horizontally, the sand on the excess sand area is moved to the sand-deficient area by the material moving plate provided on the leveling belt by adjusting the rotation direction of the leveling belt. The excess sand can be pushed by the push plate during paving, which can effectively ensure the flatness and uniformity of sandblasting.

[0013] Second, the control board regulates the operation of the first servo motor, so that the output shaft of the first servo motor drives the first adjusting screw rod connected thereto to rotate. The control board drives the second servo motor to rotate, and then drives the movable seat to slide between the second guide rail through the threaded relationship between the movable seat and the second adjusting screw rod. The cooperation of the first servo motor and the second servo motor enables the movable seat to drive the rotating leveling belt to move horizontally and vertically.

[0014] Third, the control board drives the second dual-axis motor connected thereto to rotate, so that the driving rod drives the first sliding seat to move closer to or away from each other, and then drives the first pulleys on the left and right sides to move. During the movement of the first pulley, through the cooperation of the sliding cylinder, the sliding column and the return spring, the leveling belt disposed between the first pulley and the second pulley can be tensioned, and the length of the leveling belt between the first pulleys can be quickly and stably adjusted to adapt to large castings of different models.

[0015] Fourth, when the leveling belt rotates, the limiting belt inside the leveling belt is driven to rotate, so that the limiting belt slides between the supporting seats. When the limiting belt rotates close to the supporting seat, the flatness of the leveling belt between the first pulleys can be effectively ensured through the repulsive force between the magnetic belt and the magnet and the sliding relationship between the limiting belt and the supporting seat, and thus the uniform paving can be effectively ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present invention;

[0017] Figure 2 is an internal sectional structural schematic diagram of the present invention;

[0018] Figure 3 is an enlarged structural schematic diagram of part A of the present invention;

[0019] Figure 4Schematic enlarged view of part B of the present invention;

[0020] Figure 5 Schematic plan view of the present invention.

[0021] In the figure: 101, bracket; 102, support leg; 103, mounting hole; 104, guide rail 1; 105, guiding chute 1; 106, guide rail 2; 107, movable seat; 201, sliding frame; 202, sliding rod; 203, sliding seat 1; 204, rotating shaft; 205, pulley 1; 206, dual-axis motor 1; 207, sliding cylinder; 208, sliding column; 209, sliding seat 2; 210, pulley 2; 211, return spring; 212, leveling belt; 213, material transfer plate; 214, supporting seat; 215, limiting belt; 216, magnetic belt; 301, driving seat; 302, driving rod; 303, dual-axis motor 2; 401, adjusting screw rod 1; 402, servo motor 1; 403, partition board; 404, adjusting screw rod 2; 405, servo motor 2; 501, control board. Detailed implementation manners

[0022] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Such as Figure 1 、 2As shown in the figure, a 3D printing casting sand mold flattening device includes a bracket 101. On the bracket 101, there are symmetrically distributed guide rails 104. On one side of the guide rails 104 close to the vertical center of the bracket 101, there are respectively provided guide chutes 105. Between the guide chutes 105, a guide rail 106 is slidably arranged. In the guide chute provided on the lower surface of the guide rail 106, a movable seat 107 is slidably arranged. At the bottom end of the movable seat 107, a sliding frame 201 is provided. On the sliding frame 201, uniformly distributed sliding rods 202 are slidably arranged. Between adjacent two sliding rods 202, there are respectively provided sliding seats 203. On the outer sides of the sliding seats 203, symmetrically distributed pulley 205 are rotatably arranged through rotating shafts 204. On the sliding frame 201, symmetrically distributed sliding cylinders 207 are provided. Inside the sliding cylinders 207, sliding columns 208 are slidably arranged. Between the top ends of the sliding columns 208, a sliding seat 209 is provided. On the outer sides of the sliding seat 209, symmetrically distributed pulley 210 are rotatably arranged through rotating shafts. A flattening belt 212 is drivingly arranged between the pulley 205 and the pulley 210. On the outer side of the flattening belt 212, uniformly distributed material shifting plates 213 are provided. On the sliding frame 201, there is also an adjusting module for adjusting the distance between the pulley 205. Between the guide rail 104 and the guide rail 106, there is a moving module for driving the flattening belt 212 to move.

[0024] As Figure 3 , 5 shown in the figure, between the bottom end inside the sliding cylinder 207 and the adjacent sliding column 208, a return spring 211 is provided.

[0025] As Figure 3 , 5 shown in the figure, on the lower surface of the sliding frame 201, a supporting seat 214 is provided. In the middle of the side of the flattening belt 212 close to the sliding frame 201, a limiting belt 215 is provided. The limiting belt 215 is slidably connected with the supporting seat 214. On the limiting belt 215, symmetrically distributed magnetic belts 216 are provided. The magnetic belts 216 are cooperatively installed with the magnets provided on the lower surface of the supporting seat 214.

[0026] As Figure 2 , 3 shown in the figure, inside the sliding seats 203, there are respectively provided double-shaft motors 206. The output shafts of the double-shaft motors 206 are respectively fixed with the adjacent rotating shafts 204 through couplings.

[0027] As Figure 2 , 3As shown, the adjustment module includes a driving seat 301 arranged in the middle inside the sliding frame 201. Symmetrically distributed driving rods 302 are slidably arranged inside the driving seat 301. The driving rods 302 are fixedly connected to the adjacent first sliding seat 203. Symmetrically distributed adjusting lead screws three are rotatably arranged inside the driving seat 301. A double-shaft motor two 303 is arranged in the middle inside the driving seat 301. The output shaft of the double-shaft motor two 303 is fixedly connected to the adjacent adjusting lead screw three through a coupling.

[0028] As Figure 2 , 4 As shown, the moving module includes an adjusting lead screw one 401 rotatably arranged inside the first guide rail 104. The adjusting lead screw one 401 is threadedly connected to the second guide rail 106. Symmetrically distributed first servo motors 402 are arranged on the bracket 101. The first servo motors 402 are fixedly connected to the adjusting lead screw one 401 through couplings. Symmetrically distributed partitions 403 are arranged inside the second guide rail 106. An adjusting lead screw two 404 is rotatably arranged between the partitions 403. The adjusting lead screw two 404 is threadedly connected to the movable seat 107. A second servo motor 405 is arranged inside the second guide rail 106. The second servo motor 405 is fixedly connected to the adjusting lead screw two 404 through a coupling.

[0029] As Figure 1 , 2 As shown, a control board 501 is arranged on the bracket 101. The double-shaft motor one 206, the double-shaft motor two 303, the first servo motor 402, and the second servo motor 405 are all electrically connected to the control board 501.

[0030] When it is necessary to level the molding sand sprayed by the high-precision nozzle, the control board 501 controls the operation of the first servo motor 402, so that the output shaft of the first servo motor 402 drives the connected adjusting lead screw one 401 to rotate. Then, through the threaded relationship between the adjusting lead screw one 401 and the second guide rail 106, the second guide rail 106 is driven to slide between the first guide chutes 105, so that the second guide rail 106 drives the movable seat 107 to move in the vertical direction, and the vertical position of the movable seat 107 is adjusted.

[0031] The control board 501 drives the first dual-axis motor 206 connected thereto to rotate. Further, the first dual-axis motor 206 drives the first pulley 205 to rotate through the rotating shaft 204. Then, the rotation of the first pulley 205 drives the leveling belt 212 arranged between the first pulley 205 and the second pulley 210 to rotate, causing the leveling belt 212 to drive the material transfer plate 213 arranged on its outer side to rotate. The control board 501 drives the second servo motor 405 to rotate. Then, due to the threaded relationship between the movable seat 107 and the second adjusting screw rod 404, the movable seat 107 slides between the second guide rail 106, causing the movable seat 107 to drive the rotating leveling belt 212 to move horizontally.

[0032] During the movement of the leveling belt 212, the bottom end of the leveling belt 212 contacts the molding sand ejected by the high-precision nozzle, leveling the molding sand ejected by the high-precision nozzle. By regulating the rotation direction of the conveying shaft of the first dual-axis motor 206, the rotation direction of the leveling belt 212 is regulated. Then, when the leveling belt 212 moves horizontally, by regulating the rotation direction of the leveling belt 212, the material transfer plate 213 arranged on the leveling belt 212 moves the molding sand in the excess molding sand area to the area with insufficient molding sand. Excess molding sand can be pushed by the push plate during leveling, effectively ensuring the flatness and uniformity of sandblasting.

[0033] When machining large castings of different models, the control board 501 drives the second dual-axis motor 303 connected thereto to rotate. Further, the output shafts of the second dual-axis motor 303 respectively drive the connected third adjusting screw rods to rotate. Due to the threaded relationship between the third adjusting screw rods and the driving rod 302, the driving rod 302 slides between the driving seat 301, causing the driving rod 302 to drive the first sliding seat 203 to move closer to or away from each other, and then driving the first pulleys 205 on the left and right sides to move, adjusting the distance between the two first pulleys 205. During the movement of the first pulleys 205, through the cooperation of the sliding cylinder 207, the sliding column 208, and the return spring 211, the leveling belt 212 arranged between the first pulley 205 and the second pulley 210 is tensioned, and the length of the leveling belt 212 between the first pulleys 205 can be quickly and stably adjusted to adapt to large castings of different models.

[0034] When the leveling belt 212 rotates, it drives the limiting belt 215 inside it to rotate, causing the limiting belt 215 to slide between the supporting seats 214. When the limiting belt 215 rotates and approaches the supporting seats 214, the repulsion between the magnetic belt 216 and the magnet and the sliding relationship between the limiting belt 215 and the supporting seats 214 can effectively ensure the flatness of the leveling belt 212 between the first pulleys 205, and thus effectively ensure uniform leveling.

[0035] According to another embodiment of the present invention, as Figure 1 and 2 shown, the lower surface of the bracket 101 is provided with uniformly distributed feet 102, and mounting holes 103 are formed in the lower surfaces of the feet 102. When installing and fixing, after passing a bolt through the mounting hole 103, the bolt is turned to fix the foot 102 in a suitable position, thereby effectively preventing the position of the bracket 101 from easily moving during use.

[0036] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A 3D printing casting sand mold paving device, comprising a bracket (101), characterized in that: The support (101) is provided with a symmetrically distributed guide rail 1 (104), a guide groove 1 (105) is provided on one side of the guide rail 1 (104) close to the vertical center of the support (101), a guide rail 2 (106) is slidably provided between the guide groove 1 (105), a movable seat (107) is slidably provided in the guide groove 2 provided on the lower surface of the guide rail 2 (106), a sliding frame (201) is provided at the bottom end of the movable seat (107), a sliding frame (201) is slidably provided with evenly distributed sliding rods (202) on the sliding frame (201), a sliding seat 1 (203) is provided between two adjacent sliding rods (202), and a symmetrically distributed pulley 1 (205) is provided on the outer side of the sliding seat 1 (203) for rotation via a rotating shaft (204), and the sliding frame A symmetrically distributed slide cylinder (207) is arranged on (201), and a slide column (208) is slidably arranged inside the slide cylinder (207), a slide seat 2 (209) is arranged between the top ends of the slide column (208), and a symmetrically distributed pulley 2 (210) is arranged on the outer side of the slide seat 2 (209) through a rotating shaft, and a flattening belt (212) is arranged between the pulley 1 (205) and the pulley 2 (210) for transmission, and a uniformly distributed material shifting plate (213) is arranged on the outer side of the flattening belt (212), and an adjustment module for adjusting the spacing of the pulley 1 (205) is also arranged on the sliding frame (201), and a moving module for driving the flattening belt (212) to move is arranged between the guide rail 1 (104) and the guide rail 2 (106).

2. The 3D printing casting sand mold paving device according to claim 1, characterized in that: The lower surface of the bracket (101) is provided with evenly distributed supporting feet (102), and the lower surfaces of the supporting feet (102) are each provided with mounting holes (103).

3. The 3D printing casting sand mold paving device according to claim 1, characterized in that: A return spring (211) is provided between the inner bottom end of the slide cylinder (207) and the adjacent slide column (208).

4. The 3D printing casting sand mold paving device according to claim 1, characterized in that: A dual-axis motor (206) is disposed inside the slide seat (203), and the output shafts of the dual-axis motor (206) are fixed to adjacent rotating shafts (204) via couplings.

5. The 3D printing casting sand mold paving device according to claim 4, characterized in that: The adjustment module comprises a driving seat (301) arranged in the middle of the sliding frame (201), the driving seat (301) is provided with symmetrically distributed driving rods (302) for sliding inside, the driving rods (302) are connected and fixed to the adjacent sliding seat 1 (203), the driving seat (301) is provided with symmetrically distributed adjusting screw rods 3 for rotation inside, a double-axis motor 2 (303) is arranged in the middle of the driving seat (301), and the output shaft of the double-axis motor 2 (303) is fixed to the adjacent adjusting screw rod 3 via a coupling.

6. The 3D printing casting sand mold paving device according to claim 1, characterized in that: The lower surface of the sliding frame (201) is provided with a support seat (214), and a limiting belt (215) is provided at the middle of one side of the flattening belt (212) close to the sliding frame (201), the limiting belt (215) is slidably connected with the support seat (214), and the limiting belt (215) is provided with symmetrically distributed magnetic belts (216), and the magnetic belts (216) are installed in cooperation with magnets provided on the lower surface of the support seat (214).

7. The 3D printing casting sand mold paving device according to claim 5, characterized in that: The mobile module comprises an adjusting screw rod 1 (401) rotatably arranged inside the guide rail 1 (104), the adjusting screw rod 1 (401) being threadedly connected to the guide rail 2 (106), a symmetrically distributed servo motor 1 (402) being arranged on the bracket (101), the servo motor 1 (402) and the adjusting screw rod 1 (401) being fixed via a coupling, a symmetrically distributed partition plate (403) being arranged inside the guide rail 2 (106), an adjusting screw rod 2 (404) being rotatably arranged between the partition plates (403), the adjusting screw rod 2 (404) being threadedly connected to the movable seat (107), a servo motor 2 (405) being arranged inside the guide rail 2 (106), the servo motor 2 (405) and the adjusting screw rod 2 (404) being fixed via a coupling.

8. The 3D printing casting sand mold paving device according to claim 7, characterized in that: The support (101) is provided with a control board (501), and the dual-axis motor 1 (206), the dual-axis motor 2 (303), the servo motor 1 (402) and the servo motor 2 (405) are all electrically connected to the control board (501).

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