Sand mold 3D printer for casting

Abstract

The invention discloses a sand mold 3D printer for casting, which is applied to the technical field of casting molds, and is characterized in that a structural frame is arranged as a support of a structure and is lifted to a horizontal height convenient to use, a sand supply device is used for extracting sand, and the sand is injected into a sand shakeout device; when the sand material is fed, the sand material is guided by the sand material hopper with a larger area, so that the material is not easy to scatter, then the sand material is guided into the sand storage box, and the arranged stirring shaft continuously rotates on the inner side of the sand storage box and is matched with the spiral blade on the outer side of the stirring shaft to continuously stir the sand material, so that the sand material continuously keeps moving; the adhesive spraying device is arranged in the sand hopper and is relatively uniform in the sand hopper, meanwhile, the effect of smashing caked sand is achieved, the situation that the structure is blocked is avoided, and during manufacturing, the molding box moves to the bottom of the structural frame, and then the adhesive spraying device moves along the horizontal guide rail.

Description

Technical Field

[0001] The invention belongs to the technical field of casting molds, and in particular relates to a sand mold 3D printer for casting. Background Art

[0002] A casting sand mold is a mold used to make castings in casting production. It is mainly composed of sand, binder and other additives. Silica sand is usually used as the base material, and the sand grains are bonded together by adhesives. In order to improve the performance of the sand mold, some additives can also be added. According to the design requirements of the casting, a pattern with the same shape and size as the casting is made, the pattern is placed in a sand box, and then the sand box is filled with sand. The sand mold is compacted manually or mechanically to make the sand mold have sufficient strength and air permeability.

[0003] Although the existing casting sand mold can be made by machine through extrusion or blowing, the machine moves vertically relative to the sand mold during the production process, which is not only costly, but also difficult to assemble and maintain. The structure used for sandblasting is also prone to clogging or failure to function properly due to agglomeration of sand materials.

[0004] Based on the above-mentioned situation, we found that it is difficult for the existing casting sand mold 3D printer to avoid the above problems at the same time. Therefore, we proposed a casting sand mold 3D printer with an anti-blocking and breaking structure to facilitate the opening and closing of the sand supply. At the same time, the sand laying and resin spraying devices can be set on the same track for easy maintenance and assembly. Summary of the invention

[0005] The purpose of the present invention is to target an existing sand mold 3D printer for casting, which has the advantages of having an anti-blocking and breaking-up structure, which is convenient for opening and closing the supply of sand materials, and at the same time, the sand laying and resin spraying devices can be arranged on a common rail for easy maintenance and assembly.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A sand mold 3D printer for casting, comprising a structural frame and a chassis, the chassis is installed on the outside of the structural frame, the bottom of the structural frame is bolted with a sand box track, the top of the sand box track is transmission-connected with a shaping box, the front and rear sides of the inner side of the structural frame are bolted with horizontal guide rails, the top of the horizontal guide rail is provided with an adhesive spraying device and a sand falling device, the top of the sand falling device is provided with a sand supply device, and the sand supply device is installed on the top of the structural frame;

[0007] The sand falling device includes a sand hopper, a sand storage box is bolted to the bottom of the sand hopper, a stirring shaft is rotatably connected to the inner side of the sand storage box, a spiral blade is bolted to the outer side of the stirring shaft, a sand gate is rotatably connected to the bottom of the sand storage box, and a sand leakage hole used in conjunction with the sand gate is opened at the bottom of the sand storage box.

[0008] The above technical solution is adopted, by setting a structural frame as the support of the structure, and lifting it to a horizontal height that is convenient for use, the sand supply device is used to extract the sand and inject it into the sand falling device. When the sand is put in, because there is a large sand hopper to guide the sand, it is not easy for the material to spill. Then the sand is introduced into the sand storage box, and the stirring shaft set on the inner side of the sand storage box continuously rotates to cooperate with the spiral blades on the outer side to continuously stir the sand, so that the sand continues to keep moving and is relatively uniform inside the sand hopper. At the same time, it has the effect of breaking up the agglomerated sand to avoid structural blockage. During manufacturing, the shaping box moves to the bottom of the structural frame, and then the adhesive spraying device moves along the horizontal guide rail, and applies adhesive on the tray inside the plastic box according to the path set by the program. Apply resin adhesive, then the sand dropping device moves along the horizontal guide rail, and at the same time, the sand door is opened so that the sand inside the sand storage box will fall evenly along the sand leakage hole. Because there are spiral blades inside to keep rotating, the sand is continuously moving and not easy to get blocked. After the sand is laid, the adhesive spraying device moves along the horizontal guide rail, and repeats the steps of glue coating-sand dropping-glue coating. While laying, the lifting structure inside the shaping box drives the tray to fall evenly, so as to achieve the effect of printing the required sand mold on the tray. Because the adhesive spraying device and the sand dropping device move on the same set of horizontal guide rails, compared with the structure of the prior art that can only be set vertically, it is more convenient for personnel to maintain and disassemble. At the same time, the adhesive spraying device and the sand dropping device can move synchronously to improve work efficiency. The setting of the sand door, the sand leakage hole, the stirring shaft and the stirring blades can control the falling of sand.

[0009] The present invention is further configured as follows: a rack is provided on the inner side of the horizontal guide rail, two cross beams are slidably connected to the top of the horizontal guide rail, and the adhesive spraying device and the sand falling device are respectively installed on the top of the two cross beams.

[0010] By adopting the above technical solution, a crossbeam is set up to stably support and install the adhesive spraying device and the sand falling device, and at the same time it plays the role of carrying driving components, so that the error of the adhesive spraying device and the sand falling device during movement is reduced.

[0011] The present invention is further configured as follows: gears used in conjunction with racks are provided at the bottom of the front and rear sides of the crossbeam, the gears and racks are meshed and connected, a drive motor is bolted to the inner side of the crossbeam, and the output end of the drive motor is bolted to the gear.

[0012] By adopting the above technical solution, by setting gears and racks, when it is necessary to drive the adhesive spraying device and the sand falling device to move horizontally, the drive motor on the corresponding beam can be started through program setting. When the drive motor is started, the gear will be driven to engage with the rack, and the corresponding beam will move horizontally in the direction of the rack and the horizontal guide rail.

[0013] The present invention is further configured as follows: a stepper motor is bolted to the bottom of the sand storage box, and an output end of the stepper motor is movably connected to a sand gate.

[0014] By adopting the above technical solution and arranging a stepper motor, it is possible to control the sand door to be opened or closed along the bottom of the sand storage box, so as to achieve the control effect of shielding and discharging the sand material.

[0015] The present invention is further configured as follows: a stirring motor is bolted to the inner side of the crossbeam, a sprocket is bolted to the output end of the stirring motor and the outer side of the stirring shaft, and the two sprockets are connected by a transmission chain.

[0016] By adopting the above technical solution, a stirring motor is set up. When it is necessary to control the rotation of the stirring shaft, the output end of the stirring motor rotates, and the transmission chain is driven by the sprocket to drive the stirring shaft fixed with another set of sprockets to rotate along the sand storage box, thereby achieving the effect of driving the structure to rotate.

[0017] The present invention is further configured as follows: a scraping structure is installed at the bottom of the adhesive spraying device.

[0018] By adopting the above technical solution, a scraping structure is set at the bottom of the adhesive spraying device. When the adhesive spraying device moves with the sand falling device after the sand falls, the scraping structure can quickly scrape the sand to avoid uneven sand falling.

[0019] The present invention is further configured as follows: a lifting device and a printing plate are installed on the inner side of the shaping box.

[0020] By adopting the above technical solution, by arranging the lifting device and the printing plate on the inner side of the shaping box, the sand mold tray can be placed on the top of the printing plate during processing, and the vertical height of the printing plate can be conveniently controlled by the lifting device inside the shaping box.

[0021] The present invention is further configured as follows: a guide card is bolted to the bottom of the crossbeam, and the inner side of the bottom of the guide card is slidably connected to a horizontal guide rail.

[0022] By adopting the above technical solution, by setting the guide card in conjunction with the horizontal guide rail, it is possible to limit the horizontal movement of the beam, avoid the tilt of the structure, and reduce the possibility of bumps during movement.

[0023] The present invention is further configured as follows: the front and rear sides of the adhesive spraying device and the sand falling device are both bolted with ribs, and the side of the rib close to the cross beam is bolted to the cross beam.

[0024] By adopting the above technical solution and providing ribs, the stress-bearing strength of the structure can be improved and the ribs can be used as installation locations of the structure.

[0025] The present invention is further configured as follows: the adhesive spraying device is arranged on the right side of the sand falling device, and the adhesive spraying device includes a longitudinal guide rail installed on the top of the beam, an electric slider installed on the outside of the longitudinal guide rail, and a resin sprayer installed on the top of the electric slider.

[0026] By adopting the above technical solution, by setting a longitudinal guide rail in conjunction with an electric slider, the spraying position of the resin sprayer can be easily adjusted and controlled, the accuracy of the spraying can be improved, and at the same time the glue coating position can be easily controlled by a program.

[0027] In summary, the present invention has the following beneficial effects:

[0028] A structural frame is set up as a support for the structure and it is lifted to a horizontal height that is convenient for use. The sand supply device is used to extract the sand and inject it into the sand falling device. When the sand is put in, it is not easy to spill the material because there is a large sand hopper to guide the sand. Then the sand is introduced into the sand storage box. The stirring shaft is continuously rotated on the inside of the sand storage box to cooperate with the spiral blades on the outside to continuously stir the sand, so that the sand continues to move and is relatively uniform inside the sand hopper. At the same time, it has the effect of breaking up the agglomerated sand to avoid structural blockage. During manufacturing, the shaping box moves to the bottom of the structural frame, and then the adhesive spraying device moves along the horizontal guide rail, and applies resin glue on the tray inside the plastic box according to the program-set path. Adhesive, and then the sand falling device moves along the horizontal guide rail, and the sand door is opened at the same time, so that the sand inside the sand storage box will fall evenly along the sand leakage hole. Because there are spiral blades inside to keep rotating, the sand is continuously moving and not easy to be blocked. After the sand is laid, the adhesive spraying device moves along the horizontal guide rail, and repeats the steps of gluing-sanding-gluing. While laying, the lifting structure inside the shaping box drives the tray to fall evenly, so as to achieve the effect of printing the required sand mold on the tray. Because the adhesive spraying device and the sand falling device move on the same set of horizontal guide rails, compared with the structure of the prior art that can only be set vertically, it is more convenient for personnel to maintain and disassemble. At the same time, the adhesive spraying device and the sand falling device can move synchronously to improve work efficiency. The setting of the sand door, the sand leakage hole, the stirring shaft and the stirring blades can control the falling of sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structural frame structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the position of the horizontal guide rail of the present invention;

[0032] Figure 4 It is a schematic diagram of the position of the falling sand device of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the sand falling device of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the adhesive spraying device of the present invention;

[0035] Figure 7 It is a schematic diagram of the internal structure of the falling sand device of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the stirring motor of the present invention;

[0037] Fig. 9 It is a right view of the local structure of the beam of the present invention.

[0038] Figure numerals: 1. Structural frame; 2. Chassis; 3. Sand box track; 4. Shaping box; 5. Horizontal guide rail; 6. Adhesive spraying device; 601. Longitudinal guide rail; 602. Electric slider; 603. Resin sprayer; 7. Sand falling device; 701. Sand hopper; 702. Sand storage box; 703. Stirring shaft; 704. Spiral blade; 705. Sand gate; 706. Sand leakage hole; 8. Sand supply device; 9. Rack; 10. Crossbeam; 11. Gear; 12. Drive motor; 13. Stepper motor; 14. Stirring motor; 15. Sprocket; 16. Scraping structure; 17. Guide card; 18. Rib. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0040] Embodiment 1:

[0041] refer to Figure 1-9 A sand mold 3D printer for casting includes a structural frame 1 and a chassis 2. The chassis 2 is installed on the outside of the structural frame 1. A sand box track 3 is bolted to the bottom of the structural frame 1. The top of the sand box track 3 is connected to a shaping box 4. The front and rear sides of the inner side of the structural frame 1 are bolted to horizontal guide rails 5. An adhesive spraying device 6 and a sand falling device 7 are arranged on the top of the horizontal guide rail 5. A sand supply device 8 is arranged on the top of the sand falling device 7. The sand supply device 8 is installed on the top of the structural frame 1.

[0042] The sand falling device 7 comprises a sand hopper 701, a sand storage box 702 is bolted to the bottom of the sand hopper 701, a stirring shaft 703 is rotatably connected to the inner side of the sand storage box 702, a spiral blade 704 is bolted to the outer side of the stirring shaft 703, a sand gate 705 is rotatably connected to the bottom of the sand storage box 702, and a sand leakage hole 706 used in conjunction with the sand gate 705 is opened at the bottom of the sand storage box 702;

[0043] By setting a structural frame 1 as a support for the structure and lifting it to a horizontal height that is convenient for use, the sand supply device 8 is used to extract sand and inject it into the sand falling device 7. When the sand is put in, it is not easy to spill the material because there is a large sand hopper 701 to guide the sand. Then the sand is introduced into the sand storage box 702. The stirring shaft 703 is continuously rotated on the inner side of the sand storage box 702 to cooperate with the spiral blades 704 on the outer side to continuously stir the sand, so that the sand continues to move and is relatively uniform inside the sand hopper 701. At the same time, it has the effect of breaking up the agglomerated sand to avoid structural blockage. During manufacturing, the shaping box 4 moves to the bottom of the structural frame 1, and then the adhesive spraying device 6 moves along the horizontal guide rail 5, and applies resin adhesive on the tray inside the plastic box according to the program-set path. Then, the sand dropping device 7 moves along the horizontal guide rail 5, and the sand door 705 is opened at the same time, so that the sand inside the sand storage box 702 will fall evenly along the sand leakage hole 706. Because there are spiral blades 704 inside to keep rotating, the sand is constantly moving and not easy to get blocked. After the sand is laid, the adhesive spraying device 6 moves along the horizontal guide rail 5, and repeats the steps of gluing-sand dropping-gluing. While laying, the lifting structure inside the shaping box 4 drives the tray to fall evenly, so as to achieve the effect of printing the required sand mold on the tray. Because the adhesive spraying device 6 and the sand dropping device 7 move on the same set of horizontal guide rails 5, compared with the structure of the prior art that can only be set vertically, it is more convenient for personnel to maintain and disassemble. At the same time, the adhesive spraying device 6 and the sand dropping device 7 can move synchronously to improve work efficiency. The setting of the sand door 705, in conjunction with the sand leakage hole 706, the stirring shaft 703 and the stirring blades can control the falling of the sand.

[0044] like Figure 8 As shown, a rack 9 is provided on the inner side of the horizontal guide rail 5, and two cross beams 10 are slidably connected to the top of the horizontal guide rail 5. The adhesive spraying device 6 and the sand dropping device 7 are respectively installed on the top of the two cross beams 10. By setting the cross beam 10, the adhesive spraying device 6 and the sand dropping device 7 are stably supported and installed, and at the same time, the driving components are carried, so that the error of the adhesive spraying device 6 and the sand dropping device 7 during movement is reduced.

[0045] like Figure 8 and Fig. 9As shown, the bottom of the front and rear sides of the beam 10 are provided with gears 11 used in conjunction with the rack 9, the gear 11 and the rack 9 are meshed and connected, and a drive motor 12 is bolted to the inner side of the beam 10, and the output end of the drive motor 12 is bolted to the gear 11. By setting the gear 11 to cooperate with the rack 9, when it is necessary to drive the adhesive spraying device 6 and the sand falling device 7 to move horizontally, the drive motor 12 on the corresponding beam 10 can be started through program setting. When the drive motor 12 is started, the gear 11 will be driven to mesh with the rack 9, and the corresponding beam 10 will move horizontally along the direction of the rack 9 and the horizontal guide rail 5.

[0046] like Figure 7 As shown, a stepper motor 13 is bolted to the bottom of the sand storage box 702, and the output end of the stepper motor 13 is movably connected to a sand gate 705. By setting the stepper motor 13, the sand gate 705 can be easily controlled to be opened or closed along the bottom of the sand storage box 702, so as to achieve the control effect of shielding and discharging the sand material.

[0047] like Figure 8 As shown, a stirring motor 14 is bolted to the inner side of the crossbeam 10, and a sprocket 15 is bolted to the output end of the stirring motor 14 and the outer side of the stirring shaft 703. The two sprockets 15 are connected by a transmission chain. By setting the stirring motor 14, when it is necessary to control the rotation of the stirring shaft 703, the output end of the stirring motor 14 rotates, and the transmission chain is driven by the sprocket 15 to drive the stirring shaft 703 fixed with another set of sprockets 15 to rotate along the sand storage box 702, thereby achieving the effect of driving the structure to rotate.

[0048] like Figure 6 As shown, a scraping structure 16 is installed at the bottom of the adhesive spraying device 6. By setting the scraping structure 16 at the bottom of the adhesive spraying device 6, when the adhesive spraying device 6 moves with the sand falling device 7 after the sand falls, the scraping structure 16 can quickly scrape the fallen sand to avoid uneven sand falling.

[0049] like Figure 2 As shown, a lifting device and a printing disk are installed on the inner side of the shaping box 4. By arranging the lifting device and the printing disk on the inner side of the shaping box 4, the sand mold tray can be placed on the top of the printing disk during processing, and the vertical height of the printing disk can be controlled conveniently through the lifting device inside the shaping box 4.

[0050] like Fig. 9 As shown, a guide card 17 is bolted to the bottom of the beam 10, and the inner side of the bottom of the guide card 17 is slidably connected to the horizontal guide rail 5. By arranging the guide card 17 to cooperate with the horizontal guide rail 5, the horizontal movement of the beam 10 can be limited to avoid the tilt of the structure and reduce the possibility of bumps during movement.

[0051] like Fig. 9 As shown, the front and rear sides of the adhesive spraying device 6 and the sand falling device 7 are bolted with ribs 18, and the side of the rib 18 close to the beam 10 is bolted to the beam 10. By providing the rib 18, the force-bearing strength of the structure can be improved, and it can also serve as the installation position of the structure.

[0052] like Figure 6 As shown, the adhesive spraying device 6 is arranged on the right side of the sand falling device 7. The adhesive spraying device 6 includes a longitudinal guide rail 601 installed on the top of the beam 10, an electric slider 602 installed on the outside of the longitudinal guide rail 601, and a resin sprayer 603 installed on the top of the electric slider 602. By arranging the longitudinal guide rail 601 in conjunction with the electric slider 602, the spraying position of the resin sprayer 603 can be easily adjusted and controlled to improve the accuracy of the spraying, and at the same time, the glue coating position can be easily controlled by the program.

[0053] Brief description of the use process: When in use, the sand supply device 8 is first used to extract sand materials and inject the sand materials into the sand hopper 701 of the sand falling device 7, and then the sand materials are introduced into the sand storage box 702. The stirring motor 14 drives the stirring shaft 703 through the sprocket 15 and the chain to continuously rotate on the inner side of the sand storage box 702 to cooperate with the spiral blades 704 on the outer side to continuously stir the sand materials, so that the sand materials continue to move. The shaping box 4 moves to the bottom of the structural frame 1, and then the adhesive spraying device 6 moves along the horizontal guide rail 5 and moves in the path set by the program. Resin adhesive is applied on the tray inside the plastic box, and the sand dropping device 7 moves along the horizontal guide rail 5. At the same time, the sand door 705 is opened by the stepper motor 13, so that the sand inside the sand storage box 702 will fall evenly along the sand leakage hole 706. When the adhesive spraying device 6 moves with the sand dropping device 7 after the sand is dropped, the scraping structure 16 quickly scrapes the dropped sand, repeats the glue coating and sand dropping, and adjusts the position so that the sand mold drives the tray to fall evenly according to the lifting structure inside the multi-layer forming shaping box 4. After complete forming, the tray can be taken out together with the sand mold.

[0054] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A sand mold 3D printer for casting, comprising a structural frame (1) and a chassis (2), characterized in that: The chassis (2) is installed on the outside of the structural frame (1); a sand box track (3) is bolted to the bottom of the structural frame (1); the top of the sand box track (3) is connected to a shaping box (4) in a transmission manner; the front and rear sides of the inner side of the structural frame (1) are bolted to horizontal guide rails (5); the top of the horizontal guide rails (5) is provided with an adhesive spraying device (6) and a sand falling device (7); the top of the sand falling device (7) is provided with a sand supply device (8); and the sand supply device (8) is installed on the top of the structural frame (1); The sand falling device (7) comprises a sand hopper (701), a sand storage box (702) is bolted to the bottom of the sand hopper (701), a stirring shaft (703) is rotatably connected to the inner side of the sand storage box (702), a spiral blade (704) is bolted to the outer side of the stirring shaft (703), a sand gate (705) is rotatably connected to the bottom of the sand storage box (702), and a sand leakage hole (706) used in conjunction with the sand gate (705) is opened at the bottom of the sand storage box (702).

2. A casting sand mold 3D printer according to claim 1, characterized in that: A rack (9) is provided on the inner side of the horizontal guide rail (5), and two cross beams (10) are slidably connected to the top of the horizontal guide rail (5). The adhesive spraying device (6) and the sand falling device (7) are respectively installed on the top of the two cross beams (10).

3. A casting sand mold 3D printer according to claim 2, characterized in that: The bottom of the front and rear sides of the cross beam (10) are both provided with gears (11) used in conjunction with the rack (9), the gear (11) and the rack (9) are meshingly connected, a drive motor (12) is bolted to the inner side of the cross beam (10), and the output end of the drive motor (12) is bolted to the gear (11).

4. A casting sand mold 3D printer according to claim 1, characterized in that: A stepper motor (13) is bolted to the bottom of the sand storage box (702), and an output end of the stepper motor (13) is movably connected to a sand gate (705).

5. A casting sand mold 3D printer according to claim 2, characterized in that: A stirring motor (14) is bolted to the inner side of the crossbeam (10), and a sprocket (15) is bolted to the output end of the stirring motor (14) and the outer side of the stirring shaft (703), and the two sprockets (15) are connected by a transmission chain.

6. A casting sand mold 3D printer according to claim 1, characterized in that: A scraping structure (16) is installed at the bottom of the adhesive spraying device (6).

7. A casting sand mold 3D printer according to claim 1, characterized in that: A lifting device and a printing plate are installed on the inner side of the shaping box (4).

8. A casting sand mold 3D printer according to claim 2, characterized in that: A guide card (17) is bolted to the bottom of the crossbeam (10), and the inner side of the bottom of the guide card (17) is slidably connected to the horizontal guide rail (5).

9. A casting sand mold 3D printer according to claim 2, characterized in that: The front and rear sides of the adhesive spraying device (6) and the sand falling device (7) are both bolted with ribs (18), and the side of the ribs (18) close to the cross beam (10) is bolted to the cross beam (10).

10. A casting sand mold 3D printer according to claim 2, characterized in that: The adhesive spraying device (6) is arranged on the right side of the sand falling device (7), and comprises a longitudinal guide rail (601) installed on the top of the crossbeam (10), an electric slider (602) installed on the outside of the longitudinal guide rail (601), and a resin sprayer (603) installed on the top of the electric slider (602).

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