A sand laying assembly for a sand-type 3D printing apparatus

Abstract

This utility model relates to the field of 3D printing technology and provides a sand-laying component for a sand-mold 3D printing equipment. It includes two mounting frames with a crossbeam between them. A base plate is mounted on the lower surface of the crossbeam, and a sand-laying hopper is located on the left side of the base plate. A vibrating frame is mounted at the bottom of the base plate, with the sand-laying hopper positioned on the left side of the vibrating frame. Two side plates are mounted on the front and rear sides of the bottom of the vibrating frame, with the left sides of both side plates extending to the side near the bottom of the sand-laying hopper and contacting its surface. A scraper is positioned between the lower surface of the sand-laying hopper and the two side plates. This utility model, by incorporating a horizontally movable scraper, allows the sand to be leveled as it is discharged from the bottom of the sand-laying hopper, minimizing pits in the sand layer and further improving the smoothness of the sand layer surface, thus ensuring the quality of 3D printing.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and more specifically, it relates to a sand-laying component for a sand mold 3D printing equipment. Background Technology

[0002] Sand mold 3D printers use fine sand as the base material and binder for shaping. By layering a very thin layer of sand onto the printing tray, and then spraying the binder onto the sand layer in the program-defined area, the printing tray sinks to a certain depth after curing, so that sand can be laid again. By repeating the above steps, relatively complex three-dimensional structures can be formed. The printed products are mainly used for casting or producing handicrafts.

[0003] However, when existing sand-laying hoppers lay sand, the sand falls onto the printing platform due to inertia. Although a vibration component is installed on one side of the existing sand-laying hopper to vibrate and smooth the falling sand, the sand will have pits and unevenness when it falls due to inertia. If the sand is directly smoothed by the vibration component, it is difficult to smooth out the pits and unevenness of the sand layer. This results in low flatness of the sand-laying component after the sand layer is laid, which affects the quality of 3D printing. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sand-laying component for sand mold 3D printing equipment that minimizes the problem of pits in the sand layer and further improves the flatness of the sand layer surface.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sand-laying assembly for a sand-mold 3D printing equipment includes two mounting frames, a crossbeam between the two mounting frames, a base plate on the lower surface of the crossbeam, a sand-laying hopper on the left side of the base plate, a vibrating frame at the bottom of the base plate, the sand-laying hopper on the left side of the vibrating frame, two side plates on the front and rear sides of the bottom of the vibrating frame, the left sides of the two side plates extending to the side close to the bottom of the sand-laying hopper and contacting the surface of the sand-laying hopper, and a scraper between the lower surface of the sand-laying hopper and the front and rear side plates;

[0007] The scraper has a movable cavity, and a movable rod is slidably connected inside the movable cavity. Multiple connecting grooves are formed at the bottom of the scraper's inclined surface. The upper side of the connecting grooves is inclined upward and communicates with the movable cavity. A connecting slide rod is slidably connected inside the connecting groove. The connecting slide rod slides back and forth inside the connecting groove. The upper end of the connecting slide rod extends into the movable cavity and connects with the outer surface of the movable rod. The lower end of the connecting slide rod extends out of the connecting groove. A horizontal scraper is provided at the lower end of the connecting slide rod. The lower surface of the horizontal scraper is flush with the lower surface of the scraper.

[0008] The present invention is further configured such that: an inclined baffle is provided on the left side of the top of the sand hopper, the front and rear sides of the inclined baffle contact and slide with the front and rear side plates respectively, and electric push rods are provided on the front and rear surfaces of the sand hopper, and the left end of the telescopic rod of the electric push rod is connected to the inclined baffle.

[0009] The present invention is further configured such that: the scraper is located on the side of the sand-spreading hopper away from the inclined baffle, the side of the scraper facing the inclined baffle is set as an inclined surface, the right side of the inclined baffle is in contact with the inclined surface of the scraper, the inclined baffle and the scraper can block the sand outlet of the sand-spreading hopper, and the bottom of the scraper is lower than the bottom surface of the inclined baffle.

[0010] The present invention is further configured such that: an eccentric shaft is rotatably connected between the inner walls of the front and rear sides of the vibration frame, the front end of the eccentric shaft rotatably passes through the front surface of the vibration frame, a pulley is provided at the front end of the eccentric shaft, a motor is provided on the vibration frame, a pulley is also provided at the front end of the motor output shaft, a transmission groove is provided on the vibration frame, and a belt is connected between the two pulleys, the belt passing through the transmission groove.

[0011] The present invention is further configured such that: a control cavity is provided in the side plate, a contact rod is provided in the control cavity, the upper end of the contact rod slides through the upper surface of the side plate, a triangular protrusion is provided on the front surface of the lower pulley, the upper end of the contact rod contacts the inclined surface of the triangular protrusion and slides.

[0012] The present invention is further configured such that: a sleeve plate is provided on the top wall of the control cavity, a push slide rod is slidably sleeved on the sleeve plate, a sleeve plate is sleeved on the outer surface of the push slide rod, a spring is provided between the sleeve plate and the mounting plate and is movably sleeved on the outer surface of the push slide rod, and a first rotating plate is hinged between the right end of the push slide rod and the lower end of the contact rod.

[0013] The present invention is further configured such that: the front end of the movable rod slides through into the control cavity, and a second rotating plate is hinged between the front end of the movable rod and the left end of the push slide rod.

[0014] The advantages of this utility model are:

[0015] This invention features a horizontal scraper that can move back and forth. When sand is being discharged from the bottom of the sand hopper, the horizontal scraper can level the sand, minimizing the appearance of pits in the sand layer and further improving the flatness of the sand layer surface, thus ensuring the quality during 3D printing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a sand-laying component for a sand-mold 3D printing equipment according to the present invention;

[0017] Figure 2This is a front view plan of the sand-laying hopper of this utility model;

[0018] Figure 3 This is a front view of the vibration frame of this utility model;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Mounting frame; 2. Crossbeam; 3. Base plate; 4. Vibrating frame; 5. Sand hopper; 6. Side plate; 7. Electric push rod; 8. Inclined baffle; 9. Scraper; 10. Movable cavity; 11. Movable rod; 12. Connecting inclined groove; 13. Connecting slide rod; 14. Horizontal scraper; 15. Motor; 16. Eccentric shaft; 17. Transmission groove; 18. Pulley; 19. Belt; 20. Control cavity; 21. Contact rod; 22. Mounting plate; 23. Push slide rod; 24. Sleeve plate; 25. Spring; 26. First rotating plate; 27. Second rotating plate; 28. Triangular convex plate. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1-4 The present invention provides the following technical solution:

[0024] Specifically, it refers to a sand-laying assembly for a sand-type 3D printing equipment, including two mounting frames 1, a crossbeam 2 between the two mounting frames 1, a base plate 3 on the lower surface of the crossbeam 2, a sand-laying hopper 5 on the left side of the base plate 3, the sand-laying hopper 5 being hollow inside and open at the top, and a sand outlet at the bottom of the sand-laying hopper 5 for discharging sand, the sand in the sand-laying hopper 5 being discharged through the sand outlet at the bottom.

[0025] A vibrating frame 4 is installed at the bottom of the base plate 3. A sand-laying hopper 5 is located on the left side of the vibrating frame 4. Two side plates 6 are installed on the front and rear sides of the bottom of the vibrating frame 4. The left sides of both side plates 6 extend to the side close to the bottom of the sand-laying hopper 5 and contact the surface of the sand-laying hopper 5. An inclined baffle 8 is installed on the left side of the top of the sand-laying hopper 5. The front and rear sides of the inclined baffle 8 contact and slide with the front and rear side plates 6 respectively. A scraper is installed between the lower surface of the sand-laying hopper 5 and the front and rear side plates 6. The blade 9 and scraper 9 are located on the side of the sand hopper 5 away from the inclined baffle 8. At the same time, the side of the scraper 9 facing the inclined baffle 8 is set as an inclined surface. When the right side of the inclined baffle 8 contacts the inclined surface of the scraper 9, the inclined baffle 8 and the scraper 9 can block the sand outlet of the sand hopper 5. The bottom of the scraper 9 is lower than the bottom surface of the inclined baffle 8, so that the falling sand can be scraped flat. Electric push rods 7 are provided on both the front and rear surfaces of the sand hopper 5. The left end of the telescopic rod of the electric push rod 7 is connected to the inclined baffle 8.

[0026] When in use, after the sand hopper 5 moves to the designated position, the electric push rod 7 is activated and pushes the inclined baffle 8 to move away from the scraper 9. Thus, the scraper 9 and the inclined baffle 8 form a sand outlet with an adjustable outlet size. That is, by adjusting the stroke limit of the electric push rod 7, the opening and closing size of the sand outlet of the sand spreader can be adjusted.

[0027] The scraper 9 has a movable cavity 10 inside, and a movable rod 11 is slidably connected inside the movable cavity 10. Multiple connecting grooves 12 are opened at the bottom of the inclined surface of the scraper 9. The upper side of the connecting groove 12 is inclined upward and communicates with the movable cavity 10. A connecting slide rod 13 is slidably connected inside the connecting groove 12. The connecting slide rod 13 slides back and forth inside the connecting groove 12. The upper end of the connecting slide rod 13 extends into the movable cavity 10 and connects with the outer surface of the movable rod 11. The lower end of the connecting slide rod 13 extends out of the connecting groove 12. A horizontal scraper 14 is provided at the lower end of the connecting slide rod 13. The lower surface of the horizontal scraper 14 is flush with the lower surface of the scraper 9.

[0028] During use, the movable rod 11 slides back and forth in the movable cavity 10, while the connecting slide rod 13 slides synchronously in the connecting inclined groove 12 along with the movable rod 11. At the same time, the horizontal scraper 14 slides synchronously with the connecting slide rod 13. Therefore, when the sand in the sand hopper 5 is discharged, the horizontal scraper 14 can first level the sand, further improving the flatness of the sand layer surface and ensuring the quality during 3D printing.

[0029] An eccentric shaft 16 is rotatably connected between the inner walls of the front and rear sides of the vibrating frame 4. The front end of the eccentric shaft 16 rotatably passes through the front surface of the vibrating frame 4. A pulley 18 is provided at the front end of the eccentric shaft 16. A motor 15 is provided on the vibrating frame 4. A pulley 18 is also provided at the front end of the output shaft of the motor 15. A transmission groove 17 is provided on the vibrating frame 4. A belt 19 is connected between the two pulleys 18 and passes through the transmission groove 17.

[0030] When in use, the motor 15 starts and the output shaft synchronously drives the upper pulley 18 to rotate. At this time, the belt 19 synchronously drives the lower pulley 18 to rotate, thereby driving the eccentric shaft 16 to rotate. This causes the vibrating frame 4 to vibrate, so the bottom of the vibrating frame 4 can contact the sand surface after sanding, making the sanding more uniform and flat.

[0031] Meanwhile, the motor 15 is electrically connected to a motor controller, so the rotation speed of the output shaft of the motor 15 can be controlled according to the sand spreading effect and the required sand spreading density, so that the vibration amplitude is adjustable.

[0032] A control cavity 20 is provided inside the side plate 6. A contact rod 21 is provided inside the control cavity 20. The upper end of the contact rod 21 slides through the upper surface of the side plate 6. A triangular protrusion 28 is provided on the front surface of the lower pulley 18. The upper end of the contact rod 21 contacts the inclined surface of the triangular protrusion 28 and slides. A sleeve plate 24 is provided on the top wall of the control cavity 20. A push slide rod 23 is slidably sleeved on the sleeve plate 24. The sleeve plate 24 is sleeved on the outer surface of the push slide rod 23. A spring 25 is movably sleeved on the outer surface of the push slide rod 23 between the sleeve plate 24 and the mounting plate 22. A first rotating plate 26 is hinged between the right end of the push slide rod 23 and the lower end of the contact rod 21.

[0033] When the lower pulley 18 rotates, the triangular convex plate 28 rotates synchronously with the pulley 18. When the inclined surface of the triangular convex plate 28 contacts the upper end of the contact rod 21, the inclined surface of the triangular convex plate 28 will exert a pushing force on the contact rod 21, causing the contact rod 21 to move downward. At this time, the first rotating plate 26 will push the sliding rod 23 to the left, and the spring 25 will be stressed and contracted. When the inclined surface of the triangular convex plate 28 no longer contacts the contact rod 21, the spring 25 will exert a pushing force on the sleeve plate 24, causing the sliding rod 23 to move to the right.

[0034] The front end of the movable rod 11 slides through into the control cavity 20. A second rotating plate 27 is hinged between the front end of the movable rod 11 and the left end of the push slide rod 23. When the push slide rod 23 moves to the left or right, the push slide rod 23 will exert a pushing or pulling force on the second rotating plate 27, thereby controlling the forward and backward movement of the movable rod 11.

[0035] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sand-laying assembly for a sand-casting 3D printing equipment, comprising two mounting frames (1), a crossbeam (2) disposed between the two mounting frames (1), a base plate (3) disposed on the lower surface of the crossbeam (2), and a sand-laying hopper (5) disposed on the left side of the base plate (3), characterized in that: The bottom of the base plate (3) is provided with a vibrating frame (4), and the sand hopper (5) is located on the left side of the vibrating frame (4). Two side plates (6) are provided on the front and rear sides of the bottom of the vibrating frame (4). The left side of the two side plates (6) extends to the side close to the bottom of the sand hopper (5) and contacts the surface of the sand hopper (5). A scraper (9) is provided between the lower surface of the sand hopper (5) and the front and rear side plates (6). The scraper (9) has a movable cavity (10) inside, and a movable rod (11) is slidably connected inside the movable cavity (10). Multiple connecting grooves (12) are provided at the bottom of the inclined surface of the scraper (9). The upper side of the connecting groove (12) is inclined upward and connected to the movable cavity (10). A connecting slide rod (13) is slidably connected inside the connecting groove (12). The connecting slide rod (13) slides back and forth inside the connecting groove (12). The upper end of the connecting slide rod (13) extends into the movable cavity (10) and is connected to the outer surface of the movable rod (11). The lower end of the connecting slide rod (13) extends out of the connecting groove (12). A horizontal scraper (14) is provided at the lower end of the connecting slide rod (13). The lower surface of the horizontal scraper (14) is flush with the lower surface of the scraper (9).

2. The sand-laying assembly for sand mold 3D printing equipment according to claim 1, characterized in that: An inclined baffle (8) is provided on the left side of the top of the sand hopper (5). The front and rear sides of the inclined baffle (8) are in contact with the front and rear side plates (6) respectively and slide. Electric push rods (7) are provided on the front and rear surfaces of the sand hopper (5). The left end of the telescopic rod of the electric push rod (7) is connected to the inclined baffle (8).

3. The sand-laying assembly for sand mold 3D printing equipment according to claim 2, characterized in that: The scraper (9) is located on the side of the sand hopper (5) away from the inclined baffle (8). The side of the scraper (9) facing the inclined baffle (8) is set as an inclined surface. The right side of the inclined baffle (8) is in contact with the inclined surface of the scraper (9). The inclined baffle (8) and the scraper (9) can block the sand outlet of the sand hopper (5). The bottom of the scraper (9) is lower than the bottom surface of the inclined baffle (8).

4. The sand-laying assembly for sand mold 3D printing equipment according to claim 1, characterized in that: An eccentric shaft (16) is rotatably connected between the inner walls of the front and rear sides of the vibrating frame (4). The front end of the eccentric shaft (16) rotatably passes through the front surface of the vibrating frame (4). A pulley (18) is provided at the front end of the eccentric shaft (16). A motor (15) is provided on the vibrating frame (4). A pulley (18) is also provided at the front end of the output shaft of the motor (15). A transmission groove (17) is provided on the vibrating frame (4). A belt (19) is connected between the two pulleys (18). The belt (19) passes through the transmission groove (17).

5. The sand-laying assembly for a sand-mold 3D printing equipment according to claim 1, characterized in that: The side plate (6) has a control cavity (20) and a contact rod (21) is provided in the control cavity (20). The upper end of the contact rod (21) slides through the upper surface of the side plate (6). The front surface of the lower pulley (18) is provided with a triangular protrusion (28). The upper end of the contact rod (21) contacts the inclined surface of the triangular protrusion (28) and slides.

6. The sand-laying assembly for a sand-mold 3D printing equipment according to claim 5, characterized in that: The top wall of the control cavity (20) is provided with a sleeve plate (24), a push slide rod (23) is slidably sleeved on the sleeve plate (24), the outer surface of the push slide rod (23) is sleeved with the sleeve plate (24), a spring (25) is movably sleeved on the outer surface of the push slide rod (23) between the sleeve plate (24) and the mounting plate (22), and a first rotating plate (26) is hinged between the right end of the push slide rod (23) and the lower end of the contact rod (21).

7. The sand-laying assembly for sand mold 3D printing equipment according to claim 6, characterized in that: The front end of the movable rod (11) slides through into the control cavity (20), and a second rotating plate (27) is hinged between the front end of the movable rod (11) and the left end of the push slide (23).

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