Sand paving device of 3D sand mold printing equipment

Abstract

The invention provides a sand paving device of 3D sand mold printing equipment, and relates to the technical field of sand mold printing. Two micro-control electric cylinders are symmetrically hinged to the left side wall and the right side wall of the sand paving main guide base correspondingly, a transmission gear is rotationally connected to the middle of the rear side wall of the sand paving main guide base, two meshing gears are symmetrically and rotationally connected to the bottom of the front side wall of the sand paving main guide base, and a driving shaft is rotationally connected to the middle of the bottom of the sand paving main guide base. Sanding control plates are slidably connected to the bottoms of the left and right outer side walls of the sanding main guide base, and impact columns are slidably connected to the left and right sides of the outer wall of the bottom of the sanding main guide base. The two material distributing guide rollers synchronously rotate under the cooperation of the transfer gear and the meshing gear, and the rotating directions of the two material distributing guide rollers are opposite, so that the material distributing guide bin can be uniformly filled with the printing sand through the two material distributing guide rollers, the uniformity of sand discharging can be guaranteed during sand paving, and the problems that the printing sand is difficult to accumulate and pave, and the working efficiency is high are solved. And the printing quality is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of sand mold printing, and in particular to a sand laying device for 3D sand mold printing equipment. Background Art

[0002] The sand-laying equipment of the 3D printer is one of the key equipment in the 3D printing process of casting sand molds. Its function is to lay sand on the workbench. After laying a layer, the print head can print on the laid sand layer. After laying a layer, it prints a layer, and the cycle repeats. Therefore, in the entire sand-laying process, the uniformity and efficiency of sand-laying are crucial to the quality of the sand mold and the printing speed.

[0003] Based on the above, the existing sand-laying device has the following shortcomings:

[0004] Since the printing sand accumulates in the sand laying device, if the accumulation time is too long, the sand material is prone to blockage, resulting in discontinuous sand laying, which will reduce the printing quality and efficiency. In addition, when controlling the amount of sand laying, uneven sand laying will occur, resulting in inconsistent sand mold density, which will affect the subsequent 3D printing quality. Summary of the invention

[0005] The disclosed embodiment relates to a sand-laying device of a 3D sand-printing equipment, in which a driving gear connected to the rear end of a main conveying roller is meshed with a transmission gear, so that the main conveying roller and a material-dividing guide roller can rotate synchronously through the cooperation of the transmission gear and the driven gear. The two material-dividing guide rollers can rotate synchronously under the cooperation of the transfer gear and the meshing gear, and the rotation directions of the two material-dividing guide rollers are opposite. Therefore, the printing sand can be evenly filled into the material-dividing guide bin through the two material-dividing guide rollers, so that the uniformity of the sand can be guaranteed when laying the sand.

[0006] According to a first aspect of the present disclosure, a sand-laying device for a 3D sand-printing device is provided, specifically comprising: a sand-laying dominant base; two micro-controlled electric cylinders are symmetrically hinged on the left and right side walls of the sand-laying dominant base, a conveying motor is fixedly installed at the middle of the front end of the sand-laying dominant base, two material distribution guide rollers are symmetrically rotatably connected to the inner west side of the sand-laying dominant base, a transmission gear is rotatably connected to the middle of the rear side wall of the sand-laying dominant base, a driving pulley is coaxially connected to the rear side of the transmission gear, two meshing gears are symmetrically rotatably connected to the bottom of the front side wall of the sand-laying dominant base, a driving shaft is rotatably connected to the middle of the bottom of the sand-laying dominant base, sand-laying control plates are slidably connected to the bottom of the left and right outer walls of the sand-laying dominant base, and impact columns are slidably connected to the left and right sides of the bottom outer wall of the sand-laying dominant base.

[0007] Furthermore, the interior of the sand-laying main base is hollow, and a feeding hopper is provided on the top front side of the sand-laying main base. Base connecting blocks are fixedly installed on the front and rear ends of the sand-laying main base, and two connecting card blocks are symmetrically installed on the bottom end face of the base connecting block, and the connecting card blocks are clamped on the top of the slide of the printing device.

[0008] Furthermore, a material feeding guide bin is provided in the middle of the sand-laying main base, a conveying motor is fixedly installed on the outer side of the front end of the material feeding guide bin, the rear side of the conveying motor is a spiral main conveying roller, the main conveying roller is rotatably connected in the material feeding guide bin, a driving gear is fixedly connected to the outer side of the rear end of the main conveying roller, and the bottom of the driving gear is meshingly connected with the top of the transmission gear.

[0009] Furthermore, two material distribution guide bins are provided at the left and right ends of the bottom of the material feeding guide bin of the sand-laying main base, and material distribution guide rollers are rotatably connected in the material distribution guide bins. Sand laying guide grooves are opened at the bottom of the two material distribution guide bins, and an extended sand laying groove is provided at the bottom of the sand laying guide groove.

[0010] Furthermore, the front ends of the two material distribution guide rollers are fixedly connected with transfer gears, and the two transfer gears are respectively meshed with two meshing gears, and the two meshing gears are meshed with each other. The rear end of the left material distribution guide roller is fixedly connected with a driven gear, and the upper side of the driven gear is meshed with the lower side of the transmission gear.

[0011] Furthermore, four reinforcement blocks are installed at equal distances on the outer wall of the material distribution guide bin of the sand-laying main base, and a guide groove is provided at the bottom of the side wall connecting the reinforcement block and the material distribution guide bin, in which a sand-laying control plate is slidably connected, and the bottom of the sand-laying control plate is slidably connected to the bottom side wall of the material distribution guide bin, and a hinged end seat is fixedly installed on the top of the outer wall of the sand-laying control plate, and the hinged end seat is connected to the bottom telescopic end of the micro-control electric cylinder.

[0012] Furthermore, six sliding guide grooves are installed at equal distances on the left and right side walls between the bottom of the material distribution guide bin of the sand-laying main base, and an impact column is slidably connected through the sliding guide groove. The upper and lower ends of the impact column are plate-shaped, and a limiting plate is fixedly installed on the upper side of the outer wall of the impact column. The limiting plate is slidably connected in the sliding guide groove, and a reset spring is sleeved on the outer side wall of the impact column at the bottom of the limiting plate.

[0013] Furthermore, a driven pulley is fixedly installed at the rear end of the driving shaft, and the driven pulley is connected to the driving pulley on the rear side of the driving gear through a transmission belt. Six deflection wheels are fixedly installed at equal distances on the driving shaft, and the deflection wheels are intermittently connected to the upper end of the impact column.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The base connecting blocks and connecting card blocks on the top of the front and rear ends of the sand-laying main base are installed on the top of the slide of the 3D sand printing equipment, so that it is more convenient to replace and repair the sand-laying main base, and the feeding hopper and the feeding guide bin on the front side of the top of the sand-laying main base are connected. When adding printing sand to the feeding hopper, the main conveying roller controlled by the feeding guide bin and the conveying motor cooperates, and the printing sand is conveyed to the rear end of the sand-laying main base through the spiral main conveying roller, and the driving gear and the transmission gear connected to the rear end of the main conveying roller are meshed, so that the main conveying roller and the material distribution guide roller are synchronously rotated through the cooperation of the transmission gear and the driven gear. The two material distribution guide rollers realize synchronous rotation under the cooperation of the distribution gear and the meshing gear, and the rotation directions of the two material distribution guide rollers are opposite. Therefore, the printing sand can be evenly filled in the material distribution guide bin through the two material distribution guide rollers, so that the uniformity of the sand can be guaranteed when laying sand.

[0016] 2. By fixing a reinforcement block on the outer wall of the material dividing guide bin, the strength of the material dividing guide bin is improved to prevent the expansion of the material dividing guide bin, and a guide groove is opened on the inner side of the reinforcement block, so that the bottom end of the sand laying control plate can be slidably connected to the side wall of the material dividing guide bin, so as to control the sliding of the sand laying control plate through the connection between the telescopic end at the bottom of the micro-control electric cylinder and the hinged end seat, so as to control the laying amount of printing sand to avoid loss, and there are two material dividing guide bins and sand laying control plates at the bottom of the sand laying main base, which can cooperate to complete the sand laying work faster and more accurately.

[0017] 3. Through the transmission belt, the driven pulley and the active pulley are connected, so that the driving shaft can be rotated while the main conveying roller and the material distribution guide roller rotate to feed the material. The rotation of the driving shaft controls the deflection wheel to knock the top of the impact column, so that the bottom of the impact column knocks the sand laying guide groove at the bottom of the material distribution guide bin, so as to prevent the printing sand from accumulating in the sand laying guide groove and avoid affecting the uniformity of the printing sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic diagram of the right front axial structure of the sand laying device of the 3D sand printing equipment of an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the sand laying device of the 3D sand printing equipment of an embodiment of the present invention from the right front side as viewed from above.

[0023] Figure 3 It is a schematic diagram of the structure of the sand laying device of the 3D sand mold printing equipment in an embodiment of the present invention, viewed from the right rear side.

[0024] Figure 4 It is a schematic diagram of the overall disassembled structure of the sand laying device of the 3D sand printing equipment according to an embodiment of the present invention.

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of a sand laying dominant base of a sand laying device of a 3D sand mold printing device according to an embodiment of the present invention.

[0026] Figure 6 The sand-laying device of the 3D sand printing device of the embodiment of the present invention Figure 5 A is an enlarged structural diagram of FIG.

[0027] Figure 7 It is a schematic diagram of the transmission connection structure of the transmission gear, material distribution guide roller and drive shaft of the sand laying device of the 3D sand printing equipment of an embodiment of the present invention.

[0028] Figure 8 It is a schematic diagram of the connection structure of the transmission gear and the drive shaft of the sand laying device of the 3D sand printing equipment of an embodiment of the present invention.

[0029] Reference numerals list

[0030] 1. Sand laying dominant base; 101. Feeding hopper; 102. Base connecting block; 103. Connecting block; 104. Feeding guide bin; 105. Distribution guide bin; 10501. Sand laying guide groove; 10502. Sand laying groove; 106. Reinforcement block; 107. Guide chute; 108. Sliding guide groove; 2. Micro-controlled electric cylinder; 3. Conveying motor; 301. Main conveying roller; 302. Driving gear; 4. Distribution guide roller; 401. Distribution gear; 402. Driven gear; 5. Transmission gear; 501. Active pulley; 6. Meshing gear; 7. Transmission belt; 8. Drive shaft; 801. Driven pulley; 802. Deflection wheel; 9. Sand laying control plate; 901. Articulated end seat; 10. Impact column; 1001. Limiting plate; 1002. Reset spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0032] Example 1: Please refer to Figures 1 to 8 As shown:

[0033] The present invention provides a sand-laying device for a 3D sand-type printing device, comprising a sand-laying dominant base 1; two micro-controlled electric cylinders 2 are symmetrically hinged on the left and right side walls of the sand-laying dominant base 1, a conveying motor 3 is fixedly installed at the middle of the front end of the sand-laying dominant base 1, two material distribution guide rollers 4 are symmetrically rotatably connected to the inner west side of the sand-laying dominant base 1, a transmission gear 5 is rotatably connected to the middle of the rear side wall of the sand-laying dominant base 1, and a driving pulley 501 is coaxially connected to the rear side of the transmission gear 5, two meshing gears 6 are symmetrically rotatably connected to the bottom of the front side wall of the sand-laying dominant base 1, a driving shaft 8 is rotatably connected to the middle of the bottom of the sand-laying dominant base 1, a sand-laying control plate 9 is slidably connected to the bottom of the left and right outer walls of the sand-laying dominant base 1, and impact columns 10 are slidably connected to the left and right sides of the bottom outer wall of the sand-laying dominant base 1.

[0034] Among them, the interior of the sand-laying main base 1 is hollow, and a feeding hopper 101 is opened on the top front side of the sand-laying main base 1. Base connecting blocks 102 are fixedly installed at the front and rear ends of the sand-laying main base 1. Two connecting card blocks 103 are symmetrically installed on the bottom end face of the base connecting block 102, and the connecting card block 103 is clamped on the top of the slide of the printing device.

[0035] Among them, a material feeding guide bin 104 is provided in the middle of the sand-laying main base 1, and a conveying motor 3 is fixedly installed on the outer side of the front end of the material feeding guide bin 104. The rear side of the conveying motor 3 is a spiral main conveying roller 301, and the main conveying roller 301 is rotatably connected in the material feeding guide bin 104. A driving gear 302 is fixedly connected to the outer side of the rear end of the main conveying roller 301, and the bottom of the driving gear 302 is meshed with the top of the transmission gear 5.

[0036] Among them, two material distribution guide bins 105 are provided at the left and right ends of the bottom of the material feeding guide bin 104 of the sand-laying main base 1, and the material distribution guide bins 105 are rotatably connected with the material distribution guide rollers 4. The bottoms of the two material distribution guide bins 105 are opened with sand laying guide grooves 10501, and the bottoms of the sand laying guide grooves 10501 are provided with extended sand laying grooves 10502.

[0037] Among them, the front ends of the two material dividing guide rollers 4 are fixedly connected with the transfer gears 401, and the two transfer gears 401 are respectively meshed with the two meshing gears 6, and the two meshing gears 6 are meshed with each other. The rear end of the left material dividing guide roller 4 is fixedly connected with the driven gear 402, and the upper side of the driven gear 402 is meshed with the lower side of the transmission gear 5.

[0038] By adopting the above technical scheme, the base connecting blocks 102 and the connecting card blocks 103 at the top of the front and rear ends of the sand-laying main base 1 are installed on the top of the slide of the 3D sand printing device, so that it is more convenient to replace and repair the sand-laying main base 1, and the feeding hopper 101 and the feeding guide bin 104 on the front side of the top of the sand-laying main base 1 are connected, so that when adding printing sand to the feeding hopper 101, the feeding guide bin 104 and the main conveying roller 301 controlled by the conveying motor 3 cooperate to convey the printing sand to the sand-laying main base 1 through the spiral main conveying roller 301. The rear end of the guide base 1 is transported, and the driving gear 302 connected to the rear end of the main conveying roller 301 is meshed with the transmission gear 5, so that the main conveying roller 301 and the material distribution guide roller 4 can rotate synchronously through the cooperation of the transmission gear 5 and the driven gear 402. The two material distribution guide rollers 4 can achieve synchronous rotation under the cooperation of the distribution gear 401 and the meshing gear 6, and the rotation directions of the two material distribution guide rollers 4 are opposite. Therefore, through the two material distribution guide rollers 4, the printing sand can be evenly filled in the material distribution guide bin 105, so that the uniformity of the sand can be guaranteed when laying the sand.

[0039] Embodiment 2:

[0040] Based on a sand-laying device for a 3D sand-printing device provided in the first embodiment, the driving gear 302 connected to the rear end of the main conveying roller 301 is meshed with the transmission gear 5, so that the main conveying roller 301 and the material distribution guide roller 4 are synchronously rotated through the cooperation of the transmission gear 5 and the driven gear 402. The two material distribution guide rollers 4 are synchronously rotated under the cooperation of the distribution gear 401 and the meshing gear 6, and the rotation directions of the two material distribution guide rollers 4 are opposite. Therefore, the printing sand can be evenly filled into the material distribution guide bin 105 through the two material distribution guide rollers 4, so that the printing sand can be evenly filled into the material distribution guide bin 105 when the sand is laid. To ensure the uniformity of sand laying, the sand laying device of the 3D sand mold printing equipment also includes: four reinforcement blocks 106 are installed at equal distances on the outer wall of the material distribution guide bin 105 of the sand laying main base 1, and a guide groove 107 is provided at the bottom of the side wall connecting the reinforcement block 106 and the material distribution guide bin 105. A sand laying control plate 9 is slidably connected in the guide groove 107, and the bottom of the sand laying control plate 9 is slidably connected to the bottom side wall of the material distribution guide bin 105. A hinged end seat 901 is fixedly installed on the top of the outer wall of the sand laying control plate 9, and the hinged end seat 901 is connected to the bottom telescopic end of the micro-control electric cylinder 2.

[0041] By adopting the above technical scheme, a reinforcement block 106 is fixedly installed on the outer wall of the material dividing guide bin 105, thereby improving the strength of the material dividing guide bin 105 and preventing the material dividing guide bin 105 from expanding, and a guide groove 107 is opened on the inner side of the reinforcement block 106, so that the bottom end of the sand laying control plate 9 can be slidably connected to the side wall of the material dividing guide bin 105, thereby controlling the sliding of the sand laying control plate 9 through the connection between the bottom telescopic end of the micro-control electric cylinder 2 and the hinged end seat 901, so as to control the laying amount of printing sand and avoid it from falling off, and the two material dividing guide bins 105 and the sand laying control plate 9 at the bottom of the sand laying main base 1 cooperate to complete the sand laying work faster and more accurately.

[0042] Embodiment three:

[0043] Based on a sand-laying device for a 3D sand-printing device provided in the first embodiment, the driving gear 302 connected to the rear end of the main conveying roller 301 is meshed with the transmission gear 5, so that the main conveying roller 301 and the material distribution guide roller 4 are rotated synchronously through the cooperation of the transmission gear 5 and the driven gear 402. The two material distribution guide rollers 4 are rotated synchronously under the cooperation of the distribution gear 401 and the meshing gear 6, and the rotation directions of the two material distribution guide rollers 4 are opposite. Therefore, the printing sand can be evenly filled into the material distribution guide bin 105 through the two material distribution guide rollers 4, so that the printing sand can be evenly filled into the material distribution guide bin 105 during the laying process. The uniformity of sand laying can be ensured during sand laying. The sand laying device of the 3D sand mold printing equipment also includes: six sliding guide grooves 108 are installed at equal distances on the left and right side walls between the bottom of the material distribution guide bin 105 of the sand laying main base 1, and an impact column 10 is slidably connected through the sliding guide groove 108. The upper and lower ends of the impact column 10 are plate-shaped, and a limiting plate 1001 is fixedly installed on the upper side of the outer wall of the impact column 10. The limiting plate 1001 is slidably connected in the sliding guide groove 108, and a return spring 1002 is sleeved on the outer side wall of the impact column 10 at the bottom of the limiting plate 1001.

[0044] Among them, a driven pulley 801 is fixedly installed at the rear end of the driving shaft 8, and the driven pulley 801 is connected to the driving pulley 501 on the rear side of the transmission gear 5 through the transmission belt 7. Six deflection wheels 802 are fixedly installed at equal distances on the driving shaft 8, and the deflection wheel 802 is intermittently connected to the upper end of the impact column 10.

[0045] By adopting the above technical solution, the drive shaft 8 can be rotated while the main conveying roller 301 and the material distribution guide roller 4 rotate to feed the material through the transmission belt 7 to connect the driven pulley 801 and the active pulley 501. The deflection wheel 802 is controlled by the rotation of the drive shaft 8 to hit the top of the impact column 10, so that the sand laying guide groove 10501 at the bottom of the material distribution guide bin 105 is knocked through the bottom of the impact column 10, so as to prevent the printing sand from accumulating in the sand laying guide groove 10501 and avoid affecting the uniformity of the laying of the printing sand.

[0046] Specific usage and function of this embodiment: In the present invention, the base connection block 102 and the connection card block 103 at the top of the front and rear ends of the sand-laying leading base 1 are installed on the top of the slide of the 3D sand printing device, so that it is more convenient to replace and repair the sand-laying leading base 1, and the feeding hopper 101 and the feeding guide bin 104 on the front side of the top of the sand-laying leading base 1 are connected, so that when adding printing sand to the feeding hopper 101, the feeding guide bin 104 cooperates with the main conveying roller 301 controlled by the conveying motor 3, and the spiral main conveying roller 30 The printing sand is transported to the rear end of the sand laying main base 1, and the driving gear 302 connected to the rear end of the main conveying roller 301 is meshed with the transmission gear 5, so that the main conveying roller 301 and the material distribution guide roller 4 are synchronously rotated through the cooperation of the transmission gear 5 and the driven gear 402. The two material distribution guide rollers 4 are synchronously rotated under the cooperation of the distribution gear 401 and the meshing gear 6, and the rotation directions of the two material distribution guide rollers 4 are opposite. Therefore, the printing sand can be evenly filled into the material distribution guide bin 105 through the two material distribution guide rollers 4. 5, a reinforcing block 106 is fixedly installed on the outer wall of the material distribution guide bin 105, thereby improving the strength of the material distribution guide bin 105 and preventing the material distribution guide bin 105 from expanding, and a guide groove 107 is opened on the inner side of the reinforcing block 106, so that the bottom end of the sand laying control plate 9 can be slidably connected to the side wall of the material distribution guide bin 105, so that the sliding of the sand laying control plate 9 is controlled by the connection between the bottom telescopic end of the micro-control electric cylinder 2 and the hinged end seat 901, so as to control the laying amount of printing sand and avoid it from falling off, and the bottom of the sand laying main base 1 has two material distribution guide bins 105 and sand laying control plates 9. The combination can complete the sand-laying work faster and more accurately. By driving the driven pulley 801 and the active pulley 501 through the transmission belt 7, the driving shaft 8 can be rotated while the main conveying roller 301 and the material distribution guide roller 4 rotate to feed the material. The rotation of the driving shaft 8 controls the deflection wheel 802 to knock the top of the impact column 10, so that the bottom of the impact column 10 knocks the sand-laying guide groove 10501 at the bottom of the material distribution guide bin 105, so as to prevent the printing sand from accumulating in the sand-laying guide groove 10501, so as to avoid affecting the uniformity of the laying of the printing sand.

[0047] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A sand laying device for a 3D sand printing device, characterized in that: The invention comprises a sand-laying leading base (1); two micro-controlled electric cylinders (2) are symmetrically hinged on the left and right side walls of the sand-laying leading base (1); a conveying motor (3) is fixedly installed in the middle of the front end of the sand-laying leading base (1); two material distribution guide rollers (4) are symmetrically rotatably connected to the inner west side of the sand-laying leading base (1); a transmission gear (5) is rotatably connected to the middle of the rear side wall of the sand-laying leading base (1); a driving pulley (501) is coaxially connected to the rear side of the transmission gear (5); two meshing gears (6) are symmetrically rotatably connected to the bottom of the front side wall of the sand-laying leading base (1); a driving shaft (8) is rotatably connected to the middle of the bottom of the sand-laying leading base (1); a sand-laying control plate (9) is slidably connected to the bottom of the left and right outer walls of the sand-laying leading base (1); and impact columns (10) are slidably connected to the left and right sides of the bottom outer wall of the sand-laying leading base (1).

2. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: The interior of the sand-laying leading base (1) is hollow, a feeding hopper (101) is provided on the front side of the top of the sand-laying leading base (1), a base connecting block (102) is fixedly installed at both the front and rear ends of the sand-laying leading base (1), two connecting clamping blocks (103) are symmetrically installed on the bottom end surface of the base connecting block (102), and the connecting clamping blocks (103) are clamped on the top of the slide of the printing device.

3. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: A material feeding guide bin (104) is provided in the middle of the main sand laying base (1), a conveying motor (3) is fixedly installed on the outer side of the front end of the material feeding guide bin (104), a spiral main conveying roller (301) is provided on the rear side of the conveying motor (3), the main conveying roller (301) is rotatably connected in the material feeding guide bin (104), a driving gear (302) is fixedly connected on the outer side of the rear end of the main conveying roller (301), and the bottom of the driving gear (302) is meshingly connected with the top of the transmission gear (5).

4. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: Two material distribution guide bins (105) are provided at the left and right ends of the bottom of the material feeding guide bin (104) of the sand laying main base (1), and material distribution guide rollers (4) are rotatably connected in the material distribution guide bins (105). The bottoms of the two material distribution guide bins (105) are both provided with sand laying guide grooves (10501), and the bottoms of the sand laying guide grooves (10501) are provided with extended sand laying grooves (10502).

5. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: The front ends of the two material distribution guide rollers (4) are fixedly connected to a transfer gear (401), the two transfer gears (401) are respectively meshed with two meshing gears (6), the two meshing gears (6) are meshed with each other, and the rear end of the left material distribution guide roller (4) is fixedly connected to a driven gear (402), the upper side of the driven gear (402) is meshed with the lower side of the transmission gear (5).

6. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: Four reinforcement blocks (106) are installed at equal distances on the outer side wall of the material distribution guide bin (105) of the sand laying main base (1); a guide chute (107) is provided at the bottom of the side wall connecting the reinforcement block (106) and the material distribution guide bin (105); a sand laying control plate (9) is slidably connected in the guide chute (107); the bottom of the sand laying control plate (9) is slidably connected in the bottom side wall of the material distribution guide bin (105); a hinged end seat (901) is fixedly installed on the top of the outer side wall of the sand laying control plate (9); and the hinged end seat (901) is connected to the bottom telescopic end of the micro-control electric cylinder (2).

7. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: Six sliding guide grooves (108) are installed at equal distances on the left and right side walls between the bottom of the material distribution guide bin (105) of the sand-laying main base (1), and an impact column (10) is slidably connected through the sliding guide groove (108). The upper and lower ends of the impact column (10) are plate-shaped. A limiting plate (1001) is fixedly installed on the upper side of the outer wall of the impact column (10), and the limiting plate (1001) is slidably connected in the sliding guide groove (108). A return spring (1002) is sleeved on the outer wall of the impact column (10) at the bottom of the limiting plate (1001).

8. A sand-laying device for a 3D sand-printing device as claimed in claim 1, characterized in that: A driven pulley (801) is fixedly mounted on the rear end of the driving shaft (8), and the driven pulley (801) is connected to a driving pulley (501) on the rear side of the driving gear (5) via a transmission belt (7). Six deflection wheels (802) are fixedly mounted at equal distances on the driving shaft (8), and the deflection wheels (802) are intermittently connected to the upper end of the impact column (10).

Images