A 3D sand printer material laying control device and material laying method

Abstract

The present invention relates to the technical field of sand castings, and discloses a 3D sand printer material laying control device and material laying method, comprising a printing host, a conveyor, a sand cleaning machine and a sand box, wherein a sand laying device is provided in the printing host, and the sand laying device comprises a mobile inner bin and a sand blasting assembly and an auxiliary assembly arranged on both sides of the mobile inner bin; the sand blasting assembly comprises a sand storage bin and a sand outlet channel arranged at the bottom of the sand storage bin, and a sand discharge member is provided in the sand outlet channel; the auxiliary assembly comprises a sand scraping member, a vibrating member and a rolling member, the sand scraping member is arranged between the inner wall of the mobile inner bin and the sand outlet channel, the vibrating member is arranged at the opposite side of the forward direction of the sand outlet channel, and a transmission member is provided between the auxiliary assembly and the sand laying member. The present invention, through the arrangement of the sand scraping member, enables the sand discharge member and the sand outlet channel to flatten and scrape the sand powder layer on the top surface of the sand box in advance when laying sand powder on the top surface of the sand box, so as to achieve the effect of ensuring that the top surface of the sand box is in a horizontal state when laying sand powder on the sand outlet channel.

Description

Technical Field

[0001] The present invention relates to the technical field of sand castings, and in particular to a material laying control device and a material laying method for a 3D sand printer. Background Art

[0002] 3D printing, also known as additive manufacturing, is a method of using the idea of ​​dimensionality reduction manufacturing to convert the complex three-dimensional model of the required forming work into a combination of simple two-dimensional cross-sections through slicing. It uses material powder to print layer by layer, stack layer by layer, and form from bottom to top to manufacture three-dimensional models with arbitrarily complex structures. Sand mold 3D printing is a rapid prototyping technology mainly based on droplet injection molding. In the process of laying the sand powder layer, the sand printer first lays the sand powder on the sand box through a sand laying device, and then compacts the sand powder layer through the corresponding pressure roller, and then sprays the adhesive. However, in the process of printing layer by layer, the sand box is prone to have too much sand powder in a certain position. When the pressure roller rolls on this position, the sand layer is prone to not being pressed tightly, which can easily lead to the problem of looseness in a certain part of the printed model. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0004] A 3D sand printer material laying control device includes a printing host, a conveyor, a sand cleaning machine and a sand box. The printing host is provided with a sand laying device, which includes a mobile inner chamber and a sand blasting component and an auxiliary component provided on both sides of the mobile inner chamber.

[0005] The sand blasting assembly includes a sand storage bin and a sand outlet channel provided at the bottom of the sand storage bin, wherein a sand discharge member is provided in the sand outlet channel;

[0006] The auxiliary components include a sand scraping component, a vibrating component and a rolling component. The sand scraping component is arranged between the inner wall of the movable inner bin and the sand outlet channel. The vibrating component is arranged at the opposite direction of the sand outlet channel. The rolling component is arranged at the opposite direction of the vibrating component.

[0007] A transmission part is provided between the auxiliary component and the sand-discharging part, so that when the sand-discharging part is in operation, the sand-scraping part scrapes against the top surface of the sand box as the movable inner bin moves, the vibrating part vibrates up and down on the top surface of the sand box, and the rolling part rolls on the top surface of the sand box as the movable inner bin moves.

[0008] Preferably, the sand box enters the printing host through a conveyor, the mobile inner warehouse is arranged in the printing host and is located on the top of the sand box, the mobile inner warehouse moves back and forth in the printing host, and after the sand box is completed, it is transported to the sand cleaning machine by a conveyor for demolding.

[0009] Preferably, the sand-discharging component includes a rotating shaft, a plurality of abutment plates are fixedly connected to the outer periphery of the rotating shaft, one end of the plurality of abutment plates contacts the inner wall of the sand-discharging channel, a servo motor is fixedly connected to one side of the sand-discharging channel, the output end of the servo motor is fixedly connected to one end of the rotating shaft, and the other end of the rotating shaft extends to the outer periphery of the sand-discharging channel.

[0010] Preferably, the scraping member includes a scraper, the scraper is fixedly installed in the movable inner bin, and scraping groups are provided at both ends of one side of the scraper, and a driving group is provided between the two scraping groups to drive the two scraping groups to operate;

[0011] The scraping group includes a first toothed belt, one side of the scraper is rotatably connected to two first gears through a bearing, the first toothed belt is meshed with the two first gears, and a scraping block is fixedly connected to the outer surface of the first toothed belt;

[0012] The drive group includes a plurality of second gears meshing with each other, the scraper is fixedly connected to a bracket on the side away from the first toothed belt, and the plurality of second gears meshing with each other are rotatably arranged on the bracket through bearings, wherein one side of two of the second gears is fixedly connected to a connecting shaft, and the two connecting shafts are respectively fixedly connected to two of the first gears.

[0013] Preferably, the transmission member includes a worm wheel and a worm, a movable rod is rotatably connected between the scraper and the sand outlet channel through a bearing seat, the worm is fixedly mounted on the movable rod, the worm wheel is fixedly mounted on one of the connecting shafts, the worm wheel is meshed with the worm, the movable rod and one end of the rotating shaft are fixedly connected with a third gear, and the two third gears are provided with a second toothed belt meshed with the third gear.

[0014] Preferably, the vibration component includes a compacting plate, one side of the sand outlet channel is fixedly connected to a support, both sides of the support are fixedly connected to a guide shaft, the top of the compacting plate is fixedly connected to a vertical plate, both sides of the top of the vertical plate are fixedly connected to guide blocks, the guide block is slidably arranged on the guide shaft, the bottom of the guide block is fixedly connected to a spring, the spring is sleeved on the guide shaft, the top of the vertical plate is fixedly connected to a horizontal plate, one side of the sand outlet channel is rotatably connected to a rotating rod through a bearing seat, and a plurality of fixed plates are fixedly connected to the outer periphery of the rotating rod, the fixed plate is in contact with the horizontal plate, and when the fixed plate rotates, it drives the horizontal plate to move downward.

[0015] Preferably, the transmission member also includes a third toothed belt, the rotating shaft and one end of the rotating rod are fixedly connected to a fourth gear, the fourth gear at one end of the rotating shaft is arranged on one side of the third gear, and the third toothed belt is arranged on the outer periphery of the two fourth gears and is meshed with the fourth gear.

[0016] Preferably, the rolling member includes a movable roller, a right-angle plate is fixedly connected to one side of the support, a fixed seat is fixedly connected to the bottom of the right-angle plate, and the movable roller is rotatably arranged on the bottom of the fixed seat through a bearing.

[0017] Preferably, the transmission member also includes two fifth gears, one of which is rotatably arranged on a fixed seat through a bearing and fixedly connected to one end of the movable roller, and the other fifth gear is fixedly mounted on the rotating rod and is located on one side of the fourth gear, and the two fifth gears are provided with a fourth toothed belt meshing with the fifth gear.

[0018] A 3D sand printer material laying method, using a 3D sand printer material laying control device, specifically comprising the following steps:

[0019] The sand box is moved to the printing host by a conveyor, and the sand laying device lays a layer of sand powder. During the laying process, the sand scraping piece first contacts the sand box and scrapes off the uneven top surface of the sand box and excess sand powder. When the sand outlet channel moves to the top surface of the sand box, the sand placing piece runs and lays a layer of sand powder on the top surface of the sand box through the sand outlet channel. When the sand placing piece runs, it drives the transmission piece to run, thereby driving the sand scraping piece to run. At this time, the sand scraping piece pushes the excess sand powder on the top surface of the sand box to both sides of the sand box, and drives the vibrating piece and the rolling piece to run. Through the setting of the vibrating piece and the rolling piece, the sand powder laid on the top surface of the sand box is compacted, and then the piezoelectric or thermal foaming nozzle in the printing host accurately sprays the liquid adhesive to the specific area of ​​the sand layer according to the cross-sectional data of the three-dimensional model, and the sand grains and the adhesive are combined and solidified into shape.

[0020] Compared with the prior art, the present invention provides a 3D sand printer material laying control device and material laying method, which has the following beneficial effects:

[0021] 1. A 3D sand printer material laying control device and material laying method, through the setting of the sand scraping piece, the sand placing piece and the sand outlet channel can level and scrape the sand powder layer on the top surface of the sand box in advance when laying sand powder on the top surface of the sand box, so as to achieve the effect of ensuring that the top surface of the sand box is in a horizontal state when the sand outlet channel lays sand powder, avoiding the problem that there is too much sand powder at a certain position on the top surface of the sand box, and the top surface of the sand box becomes uneven after the pressure roller rolls on this position. It solves the problem that when the sand box is printed layer by layer, there is too much sand powder at a certain position, and the sand layer is not pressed tightly when the pressure roller rolls on this position, which may easily lead to looseness of a certain part of the printed model.

[0022] 2. A 3D sand printer material spreading control device and material spreading method. Through the setting of the scraping group, when the scraper is scraping the top surface of the sand box, the two first toothed belts rotate in opposite directions to each other, so that the scraping block pushes the excess sand powder scraped by the scraper when it moves forward to both sides of the sand box, and the excess sand powder is transported out through the waste sand collection device in the printing host, so as to avoid the accumulation of excessive sand powder on both sides of the inner cavity of the mobile inner bin during the operation of the scraper, and the problem of excess sand powder returning to the top surface of the sand box when the mobile inner bin moves back and forth.

[0023] 3. A 3D sand printer material laying control device and material laying method, through the setting of a vibrating piece and a rolling piece, the sand powder laid on the top surface of the sand box is compacted twice. During the up and down vibration of the vibrating piece, the sand powder layer is compacted by the compacting plate. When the movable roller in the rolling piece rolls, the indentation produced by the compacting plate is rolled and flattened, thereby ensuring that the sand powder layer remains flat during the compaction of the sand powder layer by the vibrating piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a 3D sand printer material laying control device of the present invention;

[0025] Figure 2 This is the second structural schematic diagram of a 3D sand printer material laying control device of the present invention;

[0026] Figure 3 This is the third structural diagram of a 3D sand printer material laying control device of the present invention;

[0027] Figure 4 This is a fourth structural diagram of a 3D sand printer material laying control device of the present invention;

[0028] Figure 5 This is one of the structural schematic diagrams of the sand-laying device of the present invention;

[0029] Figure 6 This is the second structural schematic diagram of the sand-laying device of the present invention;

[0030] Figure 7 This is a schematic structural diagram of the sand scraping member of the present invention;

[0031] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of the middle part A;

[0032] Figure 9 It is a schematic diagram of the transmission structure of the present invention;

[0033] Figure 10 For the present invention Figure 9 Schematic diagram of the structure of the middle part B;

[0034] Figure 11 This is a schematic diagram of the structure of the vibration component of the present invention;

[0035] Figure 12 For the present invention Figure 11 Schematic diagram of the structure of part C in the middle.

[0036] In the figure: 1. Printing machine; 2. Conveyor; 3. Sand cleaning machine; 4. Sand box; 5. Sand spreading device; 6. Mobile inner chamber; 7. Sand blasting assembly; 8. Auxiliary assembly; 71. Sand storage bin; 72. Sand outlet channel; 73. Sand discharge unit; 81. Sand scraping unit; 82. Vibrating unit; 83. Rolling unit; 9. Transmission unit; 731. Rotating shaft; 732. Abutment plate; 733. Servo motor; 811. Scraper; 812. Scraping unit; 813. Driving unit; 8121. First toothed belt; 8122. First gear; 8123. Scraping block; 81 31. Second gear; 8132. Bracket; 8133. Connecting shaft; 91. Worm gear; 92. Worm; 93. Movable rod; 94. Third gear; 95. Second toothed belt; 821. Compacting plate; 822. Support; 823. Guide shaft; 824. Vertical plate; 825. Guide block; 826. Spring; 827. Horizontal plate; 828. Rotating rod; 829. Fixed plate; 96. Third toothed belt; 97. Fourth gear; 831. Movable roller; 832. Right-angle plate; 833. Fixed seat; 98. Fifth gear; 99. Fourth toothed belt. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] As introduced in the background technology, in order to solve the deficiencies in the existing technology, this application proposes a 3D sand printer material laying control device and material laying method.

[0039] Example 1: Please refer to Figures 1-9 A 3D sand printer material laying control device comprises a printing host 1, a conveyor 2, a sand cleaning machine 3 and a sand box 4. The printing host 1 is provided with a sand laying device 5, which includes a movable inner bin 6 and a sand blasting assembly 7 and an auxiliary assembly 8 arranged on both sides of the movable inner bin 6.

[0040] The sand blasting assembly 7 includes a sand storage bin 71 and a sand outlet channel 72 provided at the bottom of the sand storage bin 71 , wherein a sand discharge member 73 is provided in the sand outlet channel 72 ;

[0041] The auxiliary component 8 includes a sand scraping member 81, a vibrating member 82 and a rolling member 83. The sand scraping member 81 is arranged between the inner wall of the movable inner chamber 6 and the sand outlet channel 72. The vibrating member 82 is arranged at the opposite direction of the sand outlet channel 72. The rolling member 83 is arranged at the opposite direction of the vibrating member 82.

[0042] A transmission part 9 is provided between the auxiliary component 8 and the sand releasing part 73, so that when the sand releasing part 73 is running, the scraping part 81 scratches the top surface of the sand box 4 as the moving inner bin 6 moves, the vibration part 82 vibrates up and down on the top surface of the sand box 4, and the rolling part 83 rolls on the top surface of the sand box 4 as the moving inner bin 6 moves.

[0043] Specifically, the sand box 4 is moved to the printing host 1 by the conveyor 2, and the sand laying device 5 lays the sand powder layer. During the laying process, the scraping member 81 first contacts the sand box 4 and scrapes off the unevenness and excess sand powder on the top surface of the sand box 4. When the sand outlet channel 72 moves to the top surface of the sand box 4, the sand discharging member 73 runs and lays a sand powder layer on the top surface of the sand box 4 through the sand outlet channel 72. When the sand discharging member 73 runs, it drives the transmission member 9 to run, thereby driving the scraping member 81 to run. At this time, the scraping member 81 pushes the excess sand powder on the top surface of the sand box 4 to both sides of the sand box 4, and at the same time drives the vibrating member 82 and the rolling member 83 to run. Through the setting of the vibrating member 82 and the rolling member, the sand powder laid on the top surface of the sand box 4 is compacted. Then the piezoelectric or thermal foaming nozzle in the printing host 1 accurately sprays the liquid adhesive to the specific area of ​​the sand layer according to the cross-sectional data of the three-dimensional model, and the sand particles and the adhesive are combined and solidified into a shape;

[0044] By setting the scraping piece 81, the sand placing piece 73 and the sand outlet channel 72 can level and scrape the sand powder layer on the top surface of the sand box 4 in advance when laying sand powder on the top surface of the sand box 4, so as to achieve the effect of ensuring that the top surface of the sand box 4 is in a horizontal state when the sand outlet channel 72 lays sand powder, avoiding the problem that there is too much sand powder at a certain position on the top surface of the sand box 4, and the top surface of the sand box 4 becomes uneven after the pressure roller rolls on this position. It solves the problem that there is too much sand powder at a certain position on the sand box 4 during the layer-by-layer printing process, and the sand layer is not pressed tightly when the pressure roller rolls on this position, which may easily lead to looseness of a certain part of the printed model.

[0045] Example 2: The difference from the above example 1 is that, see Figure 1-Figure 4 For the above-mentioned printing host 1, the sand box 4 enters the printing host 1 through the conveyor 2, and the mobile inner bin 6 is provided in the printing host 1 and is located on the top of the sand box 4. The mobile inner bin 6 moves back and forth in the printing host 1. After the sand box 4 is completed, it is transported to the sand cleaning machine 3 by the conveyor 2 for demoulding;

[0046] Specifically, the sand box 4 is moved into the printing host 1 by the conveyor 2, and a sand powder layer is laid on the top surface of the sand box 4 by the sand-laying device 5. Then the piezoelectric or thermal foaming nozzle in the printing host 1 accurately sprays the liquid adhesive to a specific area of ​​the sand layer according to the cross-sectional data of the three-dimensional model. The sand particles and the adhesive are combined and solidified into a shape. After the model in the sand box 4 is formed, it is transported to the sand cleaning machine 3 by the conveyor 2 for demolding.

[0047] Example 3: The difference from the above-mentioned Example 2 is that, see Figure 5-10 As for the above-mentioned sand-discharging member 73, the sand-discharging member 73 includes a rotating shaft 731, a plurality of abutment plates 732 are fixedly connected to the outer periphery of the rotating shaft 731, one end of the plurality of abutment plates 732 contacts the inner wall of the sand-discharging channel 72, a servo motor 733 is fixedly connected to one side of the sand-discharging channel 72, an output end of the servo motor 733 is fixedly connected to one end of the rotating shaft 731, and the other end of the rotating shaft 731 extends to the outer periphery of the sand-discharging channel 72;

[0048] The scraping member 81 includes a scraper 811, which is fixedly installed in the movable inner chamber 6. Both ends of one side of the scraper 811 are provided with a scraping group 812. A driving group 813 is provided between the two scraping groups 812 to drive the two scraping groups 812 to operate.

[0049] The scraping group 812 includes a first toothed belt 8121. One side of the scraper 811 is rotatably connected to two first gears 8122 via a bearing. The first toothed belt 8121 is meshed with the two first gears 8122. A scraping block 8123 is fixedly connected to the outer surface of the first toothed belt 8121.

[0050] The drive assembly 813 includes a plurality of intermeshing second gears 8131. A bracket 8132 is fixedly connected to the side of the scraper 811 away from the first toothed belt 8121. The plurality of intermeshing second gears 8131 are rotatably mounted on the bracket 8132 via bearings. Two of the second gears 8131 are fixedly connected to one side of a connecting shaft 8133. The two connecting shafts 8133 are respectively fixedly connected to two of the first gears 8122.

[0051] The transmission member 9 includes a worm wheel 91 and a worm 92. A movable rod 93 is rotatably connected between the scraper 811 and the sand outlet channel 72 via a bearing seat. The worm 92 is fixedly mounted on the movable rod 93. The worm wheel 91 is fixedly mounted on one of the connecting shafts 8133. The worm wheel 91 is meshed with the worm 92. One end of the movable rod 93 and the rotating shaft 731 are both fixedly connected to a third gear 94. The two third gears 94 are provided with a second toothed belt 95 that meshes with the third gear 94.

[0052] Specifically, the servo motor 733 drives the rotating shaft 731 to rotate, thereby driving the multiple push plates 732 to rotate. When the push plates 732 rotate, the upper push plate 732 breaks away from the inner wall of the sand outlet channel 72, so that the sand powder on the top surface of the upper push plate 732 enters the bottom of the sand outlet channel 72, thereby achieving the effect of uniform sand outlet in the sand outlet channel 72. When the rotating shaft 731 rotates, it drives the first gear 8122 to rotate, and through the meshing connection between the second toothed belt 95 and the two third gears 94, drives the other third gear 94 to rotate, thereby driving the rotating rod 828 and the worm 92 fixedly connected to the rotating rod 828 to rotate, and through the meshing connection between the worm 92 and the worm wheel 91, drives the worm wheel 91 to rotate, thereby driving one of the second The gear 8131 rotates, and through the meshing connection between multiple second gears 8131, it drives the other second gears 8131 to rotate, and then drives one of the first gears 8122 in the two first toothed belts 8121 to rotate in the opposite direction, and then drives the first toothed belt 8121 to rotate, and then drives the scraper block 8123 outside the first toothed belt 8121 to rotate. The scraper block 8123 scrapes away the excess sand powder when the scraper 811 moves forward and pushes it to both sides of the sand box 4. The excess sand powder is transported out through the waste sand collection device in the printing host 1, so as to avoid the accumulation of excessive sand powder on both sides of the inner cavity of the mobile inner bin 6 during the operation of the scraper 811, and the problem of excess sand powder returning to the top surface of the sand box 4 when the mobile inner bin 6 moves back and forth.

[0053] Example 4: The difference from the above example 3 is that, see Figure 5-Figure 12 , for the above-mentioned vibration component 82, the vibration component 82 includes a compacting plate 821, a support 822 is fixedly connected to one side of the sand outlet channel 72, and guide shafts 823 are fixedly connected to both sides of the support 822. The top of the compacting plate 821 is fixedly connected to a vertical plate 824, and both sides of the top of the vertical plate 824 are fixedly connected to guide blocks 825. The guide blocks 825 are slidably arranged on the guide shaft 823, and the bottom of the guide block 825 is fixedly connected to a spring 826, which is sleeved on the guide shaft 823. The top of the vertical plate 824 is fixedly connected to a horizontal plate 827. One side of the sand outlet channel 72 is rotatably connected to a rotating rod 828 through a bearing seat. A plurality of fixed plates 829 are fixedly connected to the outer periphery of the rotating rod 828. The fixed plate 829 is in contact with the horizontal plate 827. When the fixed plate 829 rotates, it drives the horizontal plate 827 to move downward;

[0054] The transmission member 9 further includes a third toothed belt 96. A fourth gear 97 is fixedly connected to one end of the rotating shaft 731 and the rotating rod 828. The fourth gear 97 at one end of the rotating shaft 731 is disposed on one side of the third gear 94. The third toothed belt 96 is disposed on the outer periphery of the two fourth gears 97 and meshes with the fourth gears 97.

[0055] Specifically, when the servo motor 733 drives the rotating shaft 731 to rotate, it drives the fourth gear 97 to rotate, and the third toothed belt 96 is meshed with the two fourth gears 97 to drive the other fourth gear 97 to rotate, thereby driving the fourth gear 97 connected to the rotating rod 828 to rotate, and then driving the rotating rod 828 to rotate, thereby driving the fixed plate 829 on the outer periphery of the rotating rod 828 to rotate. Through the socket connection between the guide block 825 and the guide shaft 823, when one of the fixed plates 829 rotates downward, the cross plate 827 is driven to move downward, so that the spring 826 is in a squeeze state. When one of the fixed plates 829 rotates to a vertical state, it drives the compacting plate 821 to compact the sand and powder layer on the top surface of the sand box 4. When the vertical fixed plate 829 rotates upward, the fixed plate 829 is separated from the cross plate 827, and the spring 826 recovers its elasticity, thereby driving the compacting plate 821 to move upward, thereby forming a cycle, so that the compacting plate 821 repeatedly moves up and down, and compacts the sand and powder layer on the top surface of the sand box 4.

[0056] Example 5: The difference from the above-mentioned Example 4 is that, see Figure 5-Figure 12 , for the above-mentioned rolling member 83, the rolling member 83 includes a movable roller 831, a right-angle plate 832 is fixedly connected to one side of the support 822, a fixed seat 833 is fixedly connected to the bottom of the right-angle plate 832, and the movable roller 831 is rotatably arranged at the bottom of the fixed seat 833 through a bearing;

[0057] The transmission member 9 further includes two fifth gears 98, one of which is rotatably mounted on a fixed seat 833 via a bearing and fixedly connected to one end of the movable roller 831, and the other fifth gear 98 is fixedly mounted on a rotating rod 828 and located on one side of the fourth gear 97. The two fifth gears 98 are provided with a fourth toothed belt 99 meshingly connected to the fifth gears 98;

[0058] Specifically, when the rotating rod 828 rotates, it drives one of the fifth gears 98 to rotate, and through the meshing connection between the fourth toothed belt 99 and the two fifth gears 98, it drives the fifth gear 98 on one side of the fixed seat 833 to rotate, thereby driving the movable roller 831 to rotate. When the movable roller 831 rolls, it rolls and flattens the indentation produced by the compacting plate 821 after compaction, thereby ensuring that the sand and powder layer remains in a flat state during the compaction process of the vibrating component 82.

[0059] Example 6: See Figures 1-12 This embodiment discloses a 3D sand printer material laying method, using a 3D sand printer material laying control device, and the specific steps are as follows:

[0060] The sand box 4 is moved to the printing host 1 by the conveyor 2, and the sand laying device 5 lays the sand powder layer. During the laying process, the scraping member 81 first contacts the sand box 4 and scrapes off the uneven top surface and excess sand powder of the sand box 4. When the sand outlet channel 72 moves to the top surface of the sand box 4, the sand discharging member 73 runs and lays a sand powder layer on the top surface of the sand box 4 through the sand outlet channel 72. When the sand discharging member 73 runs, it drives the transmission member 9 to run, thereby driving the scraping member 81 to run. At this time, the scraping member 81 pushes the excess sand powder on the top surface of the sand box 4 to both sides of the sand box 4, and at the same time drives the vibrating member 82 and the rolling member 83 to run. Through the setting of the vibrating member 82 and the rolling member, the sand powder laid on the top surface of the sand box 4 is compacted, and then the piezoelectric or thermal foaming nozzle in the printing host 1 accurately sprays the liquid adhesive to the specific area of ​​the sand layer according to the cross-sectional data of the three-dimensional model, and the sand grains and the adhesive are combined and solidified into a shape.

[0061] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A 3D sand printer material laying control device, comprising a printing host, a conveyor, a sand cleaning machine, and a sand box, characterized in that: The printing host is provided with a sand-laying device, which includes a movable inner chamber and a sand-blasting component and an auxiliary component arranged on both sides of the movable inner chamber; The sand blasting assembly includes a sand storage bin and a sand outlet channel provided at the bottom of the sand storage bin, wherein a sand discharge member is provided in the sand outlet channel; The auxiliary components include a sand scraping component, a vibrating component and a rolling component. The sand scraping component is arranged between the inner wall of the movable inner bin and the sand outlet channel. The vibrating component is arranged at the opposite direction of the sand outlet channel. The rolling component is arranged at the opposite direction of the vibrating component. A transmission member is provided between the auxiliary assembly and the sand-discharging member, so that when the sand-discharging member is in operation, the sand-scraping member scrapes against the top surface of the sand box as the movable inner bin moves, the vibrating member vibrates up and down on the top surface of the sand box, and the rolling member rolls on the top surface of the sand box as the movable inner bin moves; The sand discharge member includes a rotating shaft, a plurality of abutment plates are fixedly connected to the outer periphery of the rotating shaft, one end of each of the abutment plates contacts the inner wall of the sand discharge channel, a servo motor is fixedly connected to one side of the sand discharge channel, an output end of the servo motor is fixedly connected to one end of the rotating shaft, and the other end of the rotating shaft extends to the outer periphery of the sand discharge channel; The scraping member includes a scraper, which is fixedly installed in the mobile inner bin. Both ends of one side of the scraper are provided with scraping groups, and a driving group is provided between the two scraping groups to drive the two scraping groups to operate; The scraping group includes a first toothed belt, one side of the scraper is rotatably connected to two first gears through a bearing, the first toothed belt is meshed with the two first gears, and a scraping block is fixedly connected to the outer surface of the first toothed belt; The drive group includes a plurality of second gears meshing with each other, the scraper is fixedly connected to a bracket on the side away from the first toothed belt, and the plurality of second gears meshing with each other are rotatably arranged on the bracket through bearings, wherein one side of two of the second gears is fixedly connected to a connecting shaft, and the two connecting shafts are respectively fixedly connected to two of the first gears.

2. A 3D sand printer material laying control device according to claim 1, characterized in that: The sand box enters the printing host through a conveyor, and the mobile inner warehouse is arranged in the printing host and is located on the top of the sand box. The mobile inner warehouse moves back and forth in the printing host. After the sand box is completed, it is transported to the sand cleaning machine by a conveyor for demoulding.

3. A 3D sand printer material laying control device according to claim 2, characterized in that: The transmission part includes a worm wheel and a worm. A movable rod is rotatably connected between the scraper and the sand outlet channel through a bearing seat. The worm is fixedly mounted on the movable rod. The worm wheel is fixedly mounted on one of the connecting shafts. The worm wheel is meshed with the worm. The movable rod and one end of the rotating shaft are fixedly connected to a third gear. The two third gears are provided with a second toothed belt meshing with the third gear.

4. A 3D sand printer material laying control device according to claim 3, characterized in that: The vibration component includes a compacting plate, one side of the sand outlet channel is fixedly connected to a support, both sides of the support are fixedly connected to a guide shaft, the top of the compacting plate is fixedly connected to a vertical plate, both sides of the top of the vertical plate are fixedly connected to guide blocks, the guide blocks are slidably arranged on the guide shaft, the bottom of the guide block is fixedly connected to a spring, the spring is sleeved on the guide shaft, the top of the vertical plate is fixedly connected to a horizontal plate, one side of the sand outlet channel is rotatably connected to a rotating rod through a bearing seat, and a plurality of fixed plates are fixedly connected to the outer periphery of the rotating rod, the fixed plate is in contact with the horizontal plate, and when the fixed plate rotates, the horizontal plate is driven to move downward.

5. A 3D sand printer material laying control device according to claim 4, characterized in that: The transmission member also includes a third toothed belt. The rotating shaft and one end of the rotating rod are fixedly connected to a fourth gear. The fourth gear at one end of the rotating shaft is arranged on one side of the third gear. The third toothed belt is arranged on the outer periphery of the two fourth gears and is meshed with the fourth gears.

6. A 3D sand printer material laying control device according to claim 5, characterized in that: The rolling part includes a movable roller, a right-angle plate is fixedly connected to one side of the support, a fixed seat is fixedly connected to the bottom of the right-angle plate, and the movable roller is rotatably arranged on the bottom of the fixed seat through a bearing.

7. A 3D sand printer material laying control device according to claim 6, characterized in that: The transmission member also includes two fifth gears, one of which is rotatably arranged on a fixed seat through a bearing and fixedly connected to one end of a movable roller, and the other fifth gear is fixedly mounted on a rotating rod and located on one side of the fourth gear, and the two fifth gears are provided with fourth toothed belts meshing with the fifth gears.

8. A 3D sand printer material laying method, characterized by: The 3D sand printer material laying control device according to any one of claims 1 to 7 is applied, and the specific steps are as follows: The sand box is moved to the printing host by a conveyor, and the sand laying device lays a layer of sand powder. During the laying process, the sand scraping piece first contacts the sand box and scrapes off the uneven top surface of the sand box and excess sand powder. When the sand outlet channel moves to the top surface of the sand box, the sand placing piece runs and lays a layer of sand powder on the top surface of the sand box through the sand outlet channel. When the sand placing piece runs, it drives the transmission piece to run, thereby driving the sand scraping piece to run. At this time, the sand scraping piece pushes the excess sand powder on the top surface of the sand box to both sides of the sand box, and drives the vibrating piece and the rolling piece to run. Through the setting of the vibrating piece and the rolling piece, the sand powder laid on the top surface of the sand box is compacted, and then the piezoelectric or thermal foaming nozzle in the printing host accurately sprays the liquid adhesive to the specific area of ​​the sand layer according to the cross-sectional data of the three-dimensional model, and the sand grains and the adhesive are combined and solidified into shape.

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