RU2690324C1 - Device for three-dimensional sand printing with several working chambers - Google Patents

Abstract

FIELD: printing equipment.

SUBSTANCE: invention relates to 3D printing of sand molds. Device comprises several working chambers and includes main body frame (100), working chamber supply system (200), working chambers (300), working chamber (400) movement mechanisms, sand distributors (500), printing head (600), cleaning device (700), liquid supply system (800), sand mixing device (900) and electric system.

EFFECT: device allows two or more working chambers to work simultaneously during operation of sand distribution and printing, which can double efficiency of printing compared to device with one working chamber with the same equipment, thus effectively reducing costs for production of sand molds.

10 cl, 24 dwg

Description

 [0001] The present invention relates to the field of 3D printing, mainly to the field of 3D printing of sand casting molds and, in particular, the invention relates to a device for three-dimensional printing of sand casting molds, containing several working chambers and capable of performing printing processes in several cameras at the same time.

BACKGROUND

[0002] Currently, the disadvantages of devices for three-dimensional printing include the low efficiency of the printing process, the high cost and the inability to meet production needs. The main causes of these drawbacks are that devices for printing sand casting molds have a similar design, and each device consists of one working chamber, a sand dispenser, a print head and other functional modules; the order of operation of all functional modules and the required time are also mostly fixed; and the efficiency of the printing process of a device for printing sand casting molds with one working chamber can be increased by increasing the size, increasing the working speed, etc. However, the increase in the size and working speed of the device is limited, the result obtained using the above method for improving printing efficiency is not perfect and still cannot meet the production needs. It is necessary to find an acceptable solution that can double the printing efficiency for the rapid development of the field of application of sand casting 3D printing. Despite the fact that from the patent for the invention under the number CN203887169U, a production line for 3D printing is known, which contains at least two working chambers to increase printing efficiency, this technology is the result of the applicants' early research working cameras for printing one by one. When one working chamber completes the printing operation, another empty working chamber can be started, so only one working chamber can print, so the processes of simultaneous sand distribution and printing are not implemented. In addition, in the prior art there are drawbacks in devices such as a printhead, sand dispenser, drive unit, and the like, and simultaneous printing processes are not implemented. Thus, the object of the present invention is to provide a device for three-dimensional printing of sand casting molds with several working chambers capable of printing simultaneously.

TECHNICAL SOLUTIONS

[0003] The device for three-dimensional printing of sand form, proposed in the present invention, includes two or more working chambers, a tank for mixing sand, a synchronous sand dispenser, a movable printhead, a mechanism for synchronous movement of the desktop, an electrical system, etc. agreed with the working cameras. The device allows two or more working chambers to simultaneously perform sand distribution and printing operations, and can double the printing efficiency compared to a three-dimensional printing device with one working chamber with the same configuration, thereby effectively reducing the cost of making sand forms and satisfying needs production.

 [0004] To solve the above technical problems, the present invention provides the following technical solutions:

 [0005] A device for three-dimensional printing of a sandy form with several working chambers includes: a main body frame (100), a working chamber feeding system (200), working chambers (300), working chambers moving mechanisms (400), sand distributors ), a printhead (600), a cleaning device (700), a fluid supply system (800), a device for mixing sand (900) and an electrical system, where

 [0006] The main body frame (100) includes at least three vertical columns. The main body frame forms two or more independent workspaces. At the bottom of each work area, there are many mechanisms for moving the working chamber (400).

[0007] A plurality of supply systems for working chambers (200) are located above each mechanism for moving the working chamber (400) to move the working chambers (300) along the Y axis direction

 [0008] The working chambers (300) include lower movable plates, and can be driven in the direction of the Z axis by the movement mechanisms of the working chamber (400).

 [0009] The control modules of the sand distributor (510), respectively, are located above each vertical column of the main body frame (100). At least three control modules of the sand distributor (510) are connected by at least two connecting beams (530). The connecting beams are connected to the drive motors of the sand distributor (520). At least two sand distributors (500) are fixed above the sliding plates corresponding to at least three control modules of the sand distributor (510). The corresponding number of sand distributors (500) is driven synchronously in the direction of the Y axis by means of drive motors of the sand distributor (520). The corresponding number of working chambers (300), respectively, is located below each of at least two sand distributors (500).

 [0010] In the upper part of the frame of the main body (100), a linear motor is installed, controlling the printhead in the X-axis direction (620). The module controlling the printhead in the Y-axis direction (633) is placed below the linear motor controlling the printhead in the X-axis direction (620). The printhead (600) is connected to the module that controls the printhead in the Y-axis direction (633). The printhead (600) can move in the X-axis direction and the Y-axis direction under the action of a linear motor that drives the printhead in the X-axis direction (620), and a servomotor that controls the printhead in the Y-direction (631).

 [0011] A device for mixing sand (900) is installed outside the upper part of the frame of the main body (100) to supply sand to sand distributors (500).

 [0012] In addition, the feed systems of the working chamber (200) include at least three beams for installing roller bearings (210). Beams for installation of roller bearings (210) are supported by support struts (250). The mounting plate (221) is fixed on one side of each beam to install the roller bearings (210). The mounting plates are connected to the supporting shafts (226). The rollers (225) are rigidly connected to the sprockets (222) and rigidly fixed to the support shafts (226) with the help of bearings (223). Finally, the bearings (223) are locked with clamping rings (224). Capacities for receiving sand (270) are installed between the support beams for mounting roller bearings (210) for receiving sand flowing from working chambers (300). After the motors (261) are installed with the motor mounting bases (262), one side of each motor (261) is fixed on one beam to install the roller bearings (210), and the other side connects to the other beam to install the roller supports (210) using connecting beams (260). The positioning mechanism of the working chamber (290) is installed on the frame of the main body (100) to adjust the working positions of the working chambers (30) in the device for three-dimensional printing of sand forms.

 [0013] In addition, the working chambers (300) include inner casings, housings, sealing frames, support frames, and felt sheets, the inner casings being made of wear-resistant materials. Cases are made of rigid materials. Sealing frames are installed around the top and along with sand distributors to avoid sand leakage around the working chambers when sand is distributed. The support frames are placed around the bottom and on the bottom surface to support adjacent structures and restrictions when the bases (323) move to the lowest parts. The felt sheets are installed in the upper sections around the bases of the working chambers (323) and are bolted using pressure plates, so that the felt sheets are tightly attached to the adjacent inner shells, ensuring no sand leaks from the bases of the working chambers during movement.

 [0014] In addition, the mechanisms for moving the working chambers (400) include frames (410), servomotors (420), lifting mechanisms (430), and transmission mechanisms (440). Servomotors (420), lifting mechanisms (430) and transmission mechanisms (440) are mounted on the frames (410). The frames (410) consist of left side supports (411), lower supports (412), right end supports (413) and motor bases (414). Servomotors (420) drive the driving wheels (442) with the help of the engine connecting shafts (441). The drive wheels (442) drive the driven wheels (445) using belts (444). The belts (444) are tightened by the squeezing wheels (443) during rotation. The driven wheels (445) are connected to the pivot arms (432) and cause them to rotate. The upper ends and the lower ends of the pivot arms (432) are fixed by floating bearings (435) and fixed bearings (431). Screw nuts (433) are installed on the pivot levers (432). When rotating the swivel arms, the screw nuts (433) move up and down along the thread. The lifting plates (438) are connected to the screw nuts (433) by means of connecting blocks (434). Sliding blocks (416) are mounted on the lifting plates (438). Sliding blocks (416) move along vertical rail guides (415). Auxiliary blocks and screw jacks are placed on the upper ends of the lifting plates (438) to support the working chambers (300) in the process of movement. The positions of the adjustment screw jacks (437) are controlled to ensure the horizontal movement of the working chambers (300).

 [0015] In addition, sand dispensers (500) include sand storage tanks (501). The tanks (501) are closed with lids (503). At one end of each cover (503) there is a hole for receiving sand (508), and at the other end there is a spiral drive motor (504). Right under the covers (503) are threaded rods (502). Threaded rods (502) are connected to spiral drive motors (504) using synchronous belt pulleys (506) and synchronous belts. In the middle of the tanks (501) for the storage of sand are installed capacity for screening sand (560). Under the sand sifting tank (560), there are holes for sand unloading (541) and cleaning plates located behind the sand discharge holes (541) and forming an angle with the horizontal plane. The eccentric shafts (551) are suspended from one side under sand storage tanks (501). The plurality of eccentric blocks (553) is mounted on eccentric shafts (551) with bearings (552). The lower ends of the eccentric blocks (553) are connected to the connecting blocks (554). The cleaning plates (570) are mounted on the back surfaces of the connecting blocks (554). The vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed under each tank (501) for storing sand. The connecting blocks (554) and the cleaning plates (570), fixed to the connecting blocks (554), are connected to the supporting bases (544) of the rotary clamps with the help of the rotary links (542) and the connecting clamps (543). The supporting base (544) swivel clamps are installed under the tanks (501) for storing sand.

 [0016] In addition, sand dispensers (500) include sand storage tanks (501). The tanks (501) are closed with lids (503). At one end of each cover (503) there is a hole for receiving sand (508), and at the other end there is a spiral drive motor (504). Right under the covers (503) are threaded rods (502). Threaded rods (502) are connected to spiral drive motors (504) using synchronous belt pulleys (506) and synchronous belts. Sand storage tanks (501) and dependent fasteners are integrally mounted on the supporting base of the rotating shaft (511) with the help of rotating shafts (512) on both sides. The support base of the rotating shaft (511) is fixed. Swinging pins (513) are mounted above the base of the rotating shaft. The cylinder bases (514) are located on both sides of the sand storage tanks (501). The supporting bases of the cylinders (514) are connected to the telescopic cylinders (515) by means of clamps. The cylindrical arms of the telescopic cylinders (515) are connected to the oscillating rods (513) with the help of pins. Sand storage tanks (501) and dependent fasteners can be integrally rotated around the support base of the rotating shaft (511) using telescopic telescopic cylinders (515). In the middle of the sand storage tanks (501) are installed funnels (521). Under the funnels (521), there are holes for sand discharge (541) and cleaning plates located on both sides of the sand discharge holes (541) and forming an angle with the horizontal plane. The eccentric shafts (551) are suspended on one side under tanks (501) for sand storage. The plurality of eccentric blocks (553) is mounted on eccentric shafts (551) with bearings (552). The other ends of the eccentric blocks (553) are connected to the funnels (521). The connecting blocks (554) are suspended under sand storage tanks (501). In the lower sections of the connecting blocks (554), grooves for elastic gas tubes (524) and cleaning plates (570) are installed. The vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed below each sand storage tank (501). Heating tubes (517) are suspended under sand storage tanks (501) and located on opposite sides of eccentric shafts (551).

 [0017] In addition, the magnetic rail guides (625) are attached to the main support frame (622) in the direction of the X axis. The rail guides are mounted on the magnetic rail guides. The linear motors controlling the printhead in the direction of the X axis (620) are connected to the sliding blocks of the rails (614) and the main connecting bases of the XY axis (628) on the rails. The modules controlling the printhead in the direction of the Y axis (633) are driven by linear motors, thereby driving the entire printhead (640) to move along the X axis. The side surfaces of the rail guides are mechanically fastened with the main support frame of the X axis ( 623) and protective plates of the main rail guide axis X (624) and (626). The auxiliary support frames of the X-axis (611) are mounted on both sides of the main support frame of the X-axis. The support frame of the auxiliary X-axis rail guide (612) is mounted on the main support frame of the X-axis for fastening rail guides (616). The sliding rail guide blocks (614) on the rail guides are connected to the auxiliary connecting bases of the X axis (615) using bolts to ensure the movement of the printhead assembly (640) in the direction of the X axis. ), sliding blocks of the rail guide axis X (614) and the plate of the auxiliary support frame of the axis X (618). The support frame is connected to the main frame of the device for three-dimensional printing using an auxiliary retaining plate of the X axis (619) and the main retaining plate of the X axis (621) to ensure that the X axis of the printhead assembly (640) of the three-dimensional printing device is in the range of total device for three-dimensional printing. The motors controlling the printhead in the direction of the Y axis (631) are connected to the modules controlling the printhead in the direction of the Y axis using fixing plates of the Y axis (632). The motor drives the movable connecting plate (634) of the Y axis to move in the direction of the Y axis of the printhead assembly (640).

 [0018] In addition, the cleaning device (700) is fixedly mounted on the base plate (714). The cleaning plate (712) is held in front and behind by two support rods (713). The spongy material (741) of the porous structure (740) is horizontally placed on the base plate of the porous structure (742). The base plate of the porous structure (742) is held by the compression spring (743). The tank for cleaning the printhead (730) is installed under the cleaning plate (712). A sealing tank (735) is formed between the tank for cleaning the printhead (730) and the cleaning plate (712). The chrome-plated shaft (732) is installed next to the tank for cleaning the printhead (730). Cleaning strips (733) and fixing plates of cleaning strips (734) are located on the chrome-plated shaft (732), with two cleaning strips (733) clamping the fixing plate (734) with bolts. Finally, the mounting plate of the cleaning strip (734) is mounted on the chrome-plated shaft (732) using mounting screws. A fluid sensor (731) is used to determine the presence of a cleaning fluid and to determine if some of the cleaning strips (733) have been soaked with cleaning fluid. Sheet clamping mechanisms (720) are held and mounted on the support rods (713) by means of horizontal adjustment springs for the compression of the cleaning plate (721). The height of the support plates (723) can be adjusted by the horizontal adjustment springs of the compression cleaning plate (721) to ensure that the support plates (723) and the cleaning plate (712) lie in the same plane.

 [0019] In addition, the fluid supply system (800) includes a mounting support, a first liquid material supply system, a waste liquid recovery system, a cleaning system, a second liquid material supply system, and other auxiliary devices, wherein the first liquid material supply system includes the first additional section, the primary filter, the first engine, the first storage tank, the second engine, the secondary filter, the first solenoid valve, the first flow controller and the first actuator. The waste fluid recovery system includes various fluid collection sites, a second solenoid valve, a third engine, a drive, a first filter, a fourth engine, a one-way valve, and a recovery section. The cleaning system includes a cleaning agent addition section, a second filter, a third filter, a second storage tank, a fifth engine, a third solenoid valve, a second regulator, and a cleaning section. The second liquid material supply system includes a second additional portion, a fourth filter, a valve, a third storage tank and a second actuator. Other accessories include a position sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor, and a wiring cabinet.

 [0020] In addition, a sand mixing device (900) includes sand pumping pumps (910), sand storage tanks (920), a main body (930), a sand mixing tank (940), and sand tanks (950 ), in which sand pumping pumps (910) are installed above sand storage tanks (920). A sand mixing tank (940) is placed under sand storage tanks (920). The sand mixing tank (940) is suspended inside the main body (930) on a transverse beam. Sand storage tanks (920), a sand mixing tank (940) and sand tanks (950) are built into the main body (930). A device for mixing sand (900) includes two pumps for pumping sand (910), two tanks for storing sand (920) and two tanks for sand (950), each of which is controlled individually, without affecting each other.

 [0021] In addition, the cleaning device (700) and the fluid supply system (800) are disposed above each other under the print head. A heating device is installed inside the frame to maintain the print areas at a constant temperature.

ADVANTAGES OF THE INVENTION

[0022] The present invention has the following advantages:

[0023] a sand shape three-dimensional printing apparatus provided by the present invention includes two or more working chambers that can operate simultaneously during sand distribution and printing operations, with the result that the printing efficiency is doubled compared to a sand printing three-dimensional printing apparatus forms with one working chamber in the same configuration, in addition, a reduction in cost and the satisfaction of production needs are achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a front view of a three-dimensional structure of a device for three-dimensional printing of sand form with several working chambers in accordance with the present invention;

 [0025] FIG. 2 is a rear view of a three-dimensional structure of a device for three-dimensional printing of sand form with several working chambers in accordance with the present invention;

 [0026] FIG. 3 is a diagram of the internal structure of a device for three-dimensional sand-shaped printing with several working chambers in accordance with the present invention;

 [0027] FIG. 4 is a block diagram of a device for three-dimensional sand-shaped printing with several working chambers in accordance with the present invention;

 [0028] FIG. 5 is a block diagram of a supply system for a working chamber in accordance with the present invention;

 [0029] FIG. 6 is a diagram of the internal structure of a roller of a supply system of a working chamber in accordance with the present invention;

 [0030] FIG. 7 is a schematic diagram of the general structure of working chambers in accordance with the present invention;

 [0031] FIG. 8 is a schematic diagram of the structure of a seal of a working chamber in accordance with the present invention;

 [0032] FIG. 9 is a schematic diagram of the mechanism for moving the working chamber in accordance with the present invention;

 [0033] Figure 10 is a first schematic diagram of the mechanism for moving the working chamber in accordance with the present invention;

 [0034] FIG. 11 is the second schematic diagram of the mechanism for moving the working chamber in accordance with the present invention;

 [0035] FIG. 12 is a schematic diagram of the general structure of a sand distributor in the first embodiment of the present invention;

 [0036] FIG. 13 is a schematic diagram of a part of the structure of a sand distributor in the first embodiment of the present invention;

 [0037] FIG. 14 is a schematic diagram of the general structure of a sand distributor in the second embodiment of the present invention;

 [0038] FIG. 15 is a schematic diagram of a part of the structure of a sand distributor in the second embodiment of the present invention;

 [0039] Fig.16 is a schematic diagram of the movement of the structure of the printhead in accordance with the present invention;

 [0040] FIG. 17 is a schematic diagram of the overall structure of a cleaning device in accordance with the present invention;

 [0041] FIG. 18 is a schematic diagram of the internal structure of a cleaning device in accordance with the present invention;

 [0042] FIG. 19 is a schematic diagram of a fluid supply system in accordance with the present invention;

 [0043] Fig.20 is a schematic diagram of the external structure of the device for mixing sand in accordance with the present invention;

 [0044] FIG. 21 is a schematic diagram of the internal structure of a sand mixing device in accordance with the present invention;

 [0045] FIG. 22 is a schematic diagram of the principle of operation of a device for mixing sand in accordance with the present invention;

 [0046] FIG. 23 is a first schematic diagram of a structure for controlling the discharge of sand in a device for mixing sand in accordance with the present invention; and

 [0047] FIG. 24 is a second schematic diagram of the structure for controlling the discharge of sand in a device for mixing sand in accordance with the present invention.

[0048] 100-frame of the main body, 200 supply system of the working chamber, 300-working chamber, 900-device for mixing sand, 010-secondary stepped rack, 020-control panel, 030-folded door, 040-primary stepped rack, 050-spare ladder, 060-electric control cabinet, 070-waste sand regeneration tank, 080-cabinet for electric servo, 090-cylinder cabinet, 101-rear viewing window, 102-side viewing window, 103-rear maintenance panel, 500- sand dispenser, 600 printhead, 700 cleaning device, 800 system under Achi fluid, 420-servomotor, 510-control module of sand distributor, 520-drive engine of sand distributor, 530-connecting beam, 620-linear motor, controlling the printhead in the X-axis direction, 633-linear module, controlling the printhead in the axial direction Y, 631-servomotor, controlling the printhead in the direction of the Y-axis, 210-beam for installing roller bearings, 220-roller bearing, 227-mechanism for moving roller bearings, 230-steel plate of steel grids, 240-steel grid, 250-support rack , 260-connect spruce beam, 261-engine, 262 base for mounting the engine, 270-capacity for receiving sand, 280-clamping mechanism of the working chamber, 290-positioning mechanism of the working chamber, 221-mounting plate, 222-sprocket, 223-bearing, 224 - clamping ring, 225-roller, 226-support shaft, 311-left and right upper sealing frames, 312-left and right housing, 313-left and right internal cavities, 314-left and right lower support frames, 321-left and right pressing plates, 322-left and right felt sheets, 323-base of the working chamber, 324-bottom bracket, 325-front and 3 rear pressure plates, 326 front and rear felt sheets, 331 front and rear upper sealing frames, 332 front and rear housings, 333 front and rear internal cavities, 334 front and rear support frames, 400-movement mechanism for working chambers, 410-frame , 411-left lateral support, 412-lower support, 413-right end support, 414 engine base, 420 servo motor, 430 lifting mechanism, 431-pinned bearing, 432 rotary lever, 433-screw nut, 434-connecting block, 435-floating bearing, 436-bearing block, 437-adjusting screw jack, 438 lift plate, 415 rail, 416 sliding block, 440 gear, 441 engine connecting shaft, 442 drive wheel, 443 compression wheel, 444 belt, 445 driven wheel, 501 tank for sand storage, 502-threaded rod, 503-cap, 504-helix drive motor, 505-base sand storage tank base, 506-synchronous belt pulley, 507-maintenance panel cover, 508-hole for receiving sand, 509-sensor sand determination, 541-hole for unloading sand, 542-turning link, 543-turning latch, 544-pivot lug support base, 545-gap adjustment plate, 550-vibration motor, 551 eccentric shaft, 552-bearing, 553 eccentric block, 554-junction block, 560-capacity for sand sifting, 570-cleaning plate, 511-base rotating shaft, 512-rotating shaft, 513-rocking rod, 514-cylinder base, 515-telescopic cylinder 516-limiting unit, 517-heating tube, 521-funnel, 522-connecting unit, 523-cleaning plate , 524-groove for elastic gas tube, 525-elastic gas felling, 541-hole for unloading sand, 551-eccentric shaft, 552-bearing, 553-eccentric block, 611-auxiliary support frame of the X axis, 612-support frame of the auxiliary rail guide axis X, 613-auxiliary rail guide of the X axis, 614 -Slide rail guide block, 615 auxiliary connecting base of X axis, 616 rail guide, 617 protective plate of X secondary auxiliary rail, 618 plate of X supporting auxiliary frame, 619 auxiliary locking plate of X axis, 621 main fix X axis mounting plate, 622-X main axle support frame, 623 X main axle support frame, 624 X main axle rail protection plate, 625 magnetic rail, 626 X main axle rail protection plate X-axis linear motor, 628-main XY axle support base, 631-motor driving the print head in the Y-axis direction, 632 engine fixing plate, 633-module driving the print head in the Y-axis direction, 634 movable connecting plate of the Y-axis , 640 printhead, 720 mechanism clamping, 730-capacity for cleaning the printhead, 740-porous structure, 750-rotary cylinder, 722-loading shaft, 711-position sensor, 712-cleaning plate, 713-support rod, 714-support plate, 715-collection tank waste liquid, 741-spongy material, 742-base plate of porous structure, 743-compression spring, 731-liquid sensor, 732-chrome-plated shaft, 733 cleaning strip, 734-mounting plate of cleaning strips, 735-sealing tank, 723-supporting cooker, 721 horizontal adjustment spring for cleaning the cleaning plate, 736 industrial tank vki, 821-first additional section, 822-primary filter, 823-first engine, 824-first storage chamber, 825-second engine, 826-secondary filter, 827-first solenoid valve, 828-first dosing valve, 829-first actuator, 831 different sites for collecting waste fluid, 832 second electromagnetic valve, 833 third engine, 834 collector, 835 first filter, 836 fourth engine, 837 non-return valve, 838 recovery section, 841 adding section detergent, 842 second filter, 843 third filter, 844 second chamber for storage 845 fifth engine, 846 third solenoid valve, 847 second dispensing valve, 848 cleaning section, 851- second additional section, 852 fourth filter, 853 valve, 854 third storage chamber, 855 second executive element, 910 sand pumping pump, 920 sand storage tank, 921 inlet tube for sand, 922 mass sensor, 930 main body, 931 control cabinet, 932 base support for the fluid supply system, 923 first control valve , 940 sand mixing section, 941 intake tube of the sand mixing section, 942-lower part of the mixing tank sand, 943-engine, 924-first vibromotor, 948-gauge, 950-tank for sand, 951-guide metal plate, 952-second control valve, 953-second vibromotor, 944-air cylinder, 945-connecting bracket, 946 - sealing block, 947-upper part of the sand mixing tank and 949-mixing blade.

OPTIONS FOR IMPLEMENTING THE PRESENT INVENTION

[0049] In order for those skilled in the art to better understand the technical solutions of the present invention, a detailed description of the invention is given below, along with specific embodiments.

 [0050] The overall construction of the device of the present invention is shown in FIG. 1-4. A device for three-dimensional printing of a sandy form with several working chambers includes: the main body frame (100), the working chamber feeding system (200), working chambers (300), working chambers moving mechanisms (400), sand distributors (500), printing a head (600), a cleaning device (700), a fluid supply system (800), a device for mixing sand (900) and an electrical system, where the frame (100) of the main body includes at least three vertical columns. The main body (100), consisting of more than three vertical columns, has more than two independent work areas. A number of mechanisms for moving working chambers (400), respectively, are installed at the bottom of each work area. A plurality of working chambers supply systems (200) are located above each of more than two sets of independent movement mechanisms of working chambers (400) for moving the working chambers (300) along the Y-axis direction. The lower plates of the working chambers (300) are movable plates. Working chambers (300) can be driven in the direction of the Z axis by the movement mechanisms of the working chamber (400). More than three control modules of the sand distributor (510), respectively, are located above each of the three vertical columns of the main body frame (100). More than three control modules of the sand distributor (510) are connected by at least two connecting beams (530). The connecting beams are connected to the drive motors of the sand distributor (520). The corresponding number of working chambers (300), respectively, is located below each of at least two sand distributors (500). Sand distributors (500) are fixed above the sliding plates corresponding to at least three control modules of the sand distributor (510). The corresponding number of sand distributors (500) is driven synchronously in the direction of the Y axis by means of drive motors of the sand distributor (520). A linear motor is installed in the upper part of the frame of the main body (100), which controls the print head in the direction of the X axis (620). The module controlling the printhead in the Y-axis direction (633) is placed below the linear motor controlling the printhead in the X-axis direction (620). The printhead (600) is connected to the module that controls the printhead in the Y-axis direction (633). The printhead (600) can move in the X-axis direction and the Y-axis direction under the action of a linear motor that drives the printhead in the X-axis direction (620), and a servomotor that controls the printhead in the Y-direction (631). A device for mixing sand (900) is installed outside the upper part of the frame of the main body (100) to supply sand to sand distributors (500). The cleaning device (700) and the fluid supply system (800) are located under the printhead (600) in the direction of the Y axis, one above the other. A heating device is installed inside the frame to maintain the print areas at a constant temperature. The heating device can be a lamp tube, air conditioning, microwaves, etc. in each wavelength range.

 [0051] In another embodiment of the present invention, there is another reciprocal sequence of a plurality of sand distributors (500) and a printhead (600), i.e., a sand distributor drive motor (520) is installed on each sand distributor (500), each sand distributor (500) can scatter the sand separately, and the printhead (600) can print each work area separately after completing the sand.

 [0052] The general principle of the system is as follows: sand, liquid materials and similar substances for 3D printing are mixed with a device for mixing sand (900), and then quantitatively fed to sand distributors (500). When the drive motors of the sand distributor (520) are rotated, the three control modules of the sand distributor 510 are synchronously driven by more than two connecting beams (530) to control the corresponding number of sand distributors (500) for synchronous operation along the Y-axis direction. Sand distributors ( 500) return to the initial position after the completion of sand spreading over two or more independent working chambers (300), respectively. At the same time, after the printhead (600) has completed full-format printing on the sand surface over two or more working chambers (300), in which the sand distribution is completed while controlling the linear motor, controlling the printhead in the direction of the X axis (620) and servomotor , controlling the printhead in the direction of the Y axis (631), the printhead (600) returns to its original position. At the same time, the mechanisms for moving the working chamber (400) lower the movable lower plates of the working chambers (300) by a distance which is 0.1-1 mm, preferably 0.2-0.5 mm. The above sand distribution and printing processes are repeated until the completion of the entire printing process. In the above sand distribution and printing processes, the cleaning device (700) performs regular cleaning and prevents the print head (600) from sticking off; and a fluid supply system (800) supplies liquid materials to a sand mixing device (900) and a printhead (600).

[0053] After printing is completed, the working chambers (300) are output by the working chambers feed system (200). The external mechanism for moving roller bearings (227) quickly replaces empty chambers with filled chambers to increase the speed of camera exchange and reduce waiting time.

 [0054] In another embodiment of the present invention, the working chamber feed systems (200) have the structures shown in FIG. 5-6, and held by three beams to install roller bearings (210). Beams for installation of roller bearings (210) are supported by support struts (250). Capacities for receiving sand (270) are installed between the support beams for mounting roller bearings (210) for receiving sand flowing from working chambers (300). Steel gratings (240) are mounted on the base plates of steel gratings (230). All of the above connections are bolted. Mounting plates (221) are welded to the beams to install roller bearings (210). The mounting plates are connected to the supporting shafts (226). The rollers (225) and sprockets (222) are bolted together and rigidly attached to the support shafts (226) using bearings (223). Bearings (223) are locked with clamping rings (224). After the motors (261) are installed with the motor mounting bases (262), one side of each motor (261) is fixed on one beam to install the roller bearings (210), and the other side connects to the other beam to install the roller supports (210) using connecting beams (260). The positioning mechanism of the working chamber (290) is installed on the frame of the main body (100) to adjust the working positions of the working chambers (30) in the device for three-dimensional printing of sand forms.

 [0055] The principle of operation of the supply system of the working chamber (200) is as follows: when it is necessary to move the working chambers (300) from the sand-shaped three-dimensional printing device, the connecting beams (260) are driven by motors (261), so that the roller bearings (220) on both sides of the working chambers (300) work synchronously to ensure that the working chambers (300) do not tilt forward and backward during operation. The force transmitted to the connecting beams (260) by engines (261) is also transmitted to chains (222) by chains. After that, the rollers (225) are rotated to move the working chambers (300). After the working chambers (300) are moved to the indicated positions of the device for three-dimensional sand-shaped printing, the clamping mechanisms of the working chamber (280) clamp the working chambers (300) in the Y-axis direction, so that the side surfaces of the working chambers (300) are in close contact with the positioning mechanisms of the working chamber (290). Then, the working chambers (300) are fully positioned front, back, left and right. During the operation of the device for the three-dimensional printing of sandy forms, part of the sand in the working chambers (300) may flow from the side surfaces of the working chambers (300). The seeping sand enters the sand receiving tanks (270) and is then cleaned with a dust collector. After the sand form three-dimensional printing device completes the printing process, the roller bearings (220) move the working chambers. The working chambers (300) are moved to the sand removal position when the rollers are raised using the roller bearing lifting mechanism (227), thereby completing the work. In this case, the left and right structures of roller bearings (220) can work both simultaneously and separately, thereby allowing multiple working chambers to enter and exit the device for three-dimensional printing of sand form at different times.

 [0056] In another embodiment of the present invention, the working chambers (300) have the structures shown in FIG. 7-8. The internal cavities (including the left and right internal cavities (313) and the front and rear internal cavities (333)) are made of wear-resistant material and experience a constant friction force of the sand and felt sheets. Shells (including left and right shells (312) and front and back shells (332)), made of materials with high rigidity, form common frames of working chambers, provide overall strength and rigidity of working chambers and prevent deformation. Shells are connected to the working chambers with bolts. The sealing frames (including the left and right upper sealing frames (311) and the front and rear upper sealing frames (331)) are installed at the top of the device and flush with the sand dispensers to avoid sand leakage around the working chambers during sand distribution. Support frames (including left and right lower support frames (314), front and rear support frames (334) and lower brackets (324)) are mounted on the bottom surface, to hold and restrict the support structures when the bases (323) move to the lowest plots. Felt sheets (including left and right felt sheets (322) and front and rear felt sheets (326)) are installed in the upper sections around the bases of the working chambers (323) and bolted using pressure plates (including left and right pressure plates (321) and the front and rear pressure plates (325)), so that the felt sheets stick tightly to the surrounding internal cavities to ensure that no sand leaks through the bottoms of the working chambers.

 [0057] The principle of operation of the working chambers (300) is as follows: the mechanisms for moving the working chambers (400) push the bases of the working chambers (323) to the upper portion of the device, after which sand distributors (500) are activated. Upper sealing frames ensure that sand is only inside the working chambers when sand is scattered and sand does not leak. After the sand distributors (500) finish the distribution of the sand layer, and the print head completes the corresponding printing operations, the bases of the working chambers (323) are lowered to a fixed height under the action of the movement mechanism (400). The above processes of sand distribution and printing are repeated until the bases of the working chambers (323) are lowered to the lowest section, thus completing all the work on sand distribution and printing.

 [0058] In another embodiment of the present invention, the mechanisms for moving the working chambers (400) have the structures shown in FIG. 9-11 and include frames (410), servomotors (420), lifting mechanisms (430) and transmission mechanisms (440). Servomotors (420), lifting mechanisms (430) and transmission mechanisms (440) are mounted on the frames (410). The frames (410) consist of left side supports (411), lower supports (412), right end supports (413) and motor bases (414). Servomotors (420) drive the driving wheels (442) with the help of the engine connecting shafts (441). The drive wheels (442) drive the driven wheels (445) using belts (444). The belts (444) are tightened by the squeezing wheels (443) during rotation. The driven wheels (445) are connected to the pivot arms (432) and cause them to rotate. The upper ends and the lower ends of the pivot arms (432) are fixed by floating bearings (435) and fixed bearings (431).

 [0059] The principle of operation of the mechanisms for moving the working chambers (400) is as follows: in the process of operating the device for three-dimensional sand-shaped printing, the working chambers (300) reach the indicated positions, and the lifting mechanisms (430) of the moving mechanisms (400) are located on the highest plot of the working range. When printing, the servomotors (420) in the displacement mechanisms (400) drive the driving wheels (442) to work with the engine connecting shafts (441). The drive wheels (442) drive the driven wheels (445) using belts (444). The belts (444) are tightened by the squeezing wheels (443) during rotation. The driven wheels (445) are connected to the pivot arms (432) and cause them to rotate. The upper ends and the lower ends of the pivot arms (432) are fixed by floating bearings (435) and fixed bearings (431). When turning the swivel arms, the screw nuts (433) move down the thread. The lifting plates (438) are connected to the screw nuts (433) by means of connecting blocks (434). When the screw nuts (433) are moved down, the lifting plates (438) are lowered using the connecting blocks (434). Sliding blocks (416) are mounted on the lifting plates (438). Sliding blocks (416) move along rail rails (415), while the rail guides can be vertically mounted on brackets to ensure that the lifting plates (438) move up and down without deviation. The working chambers (300) are supported by four support blocks (436) during the entire movement process. The positions of the adjustment screw jacks (437) are controlled to ensure the horizontal movement of the working chambers (300). After the entire printing process is completed, the mechanisms (400) are moved upward to return to their original starting positions.

 [0060] In another embodiment of the present invention, in the first embodiment, sand dispensers (500) have the structures shown in FIG. 12-13. The sand dispenser (500) has a unidirectional structure. In particular, as shown in the drawings, in order to regulate the increase in the width of the sand storage tank (over 2 m), each sand storage tank (501) is formed by connecting two rectangular pipes. The space between the rectangular tubes is intended for sand storage. The tanks (501) are closed with lids (503) with the help of hinges. Covers (503) can pivot around hinges. At one end of each cover (503) there is a hole for receiving sand (508), and at the other end there is a spiral drive motor (504). Right under the covers (503) are threaded rods (502). Threaded rods (502) are connected to spiral drive motors (504) using synchronous belt pulleys (506) and synchronous belts. In the middle of the sand storage tanks (501) are installed capacity for screening sand (560). Under the screen for sand screening (560) holes for sand unloading (541) are installed. Flat plates adjacent to the rear of the sand discharge holes (541) and forming a certain angle with the horizontal plane are cleaning plates (570), with an angle of 0-5 degrees.

 [0061] The eccentric shafts (551) are suspended from one side under sand storage tanks (501). The plurality of eccentric blocks (553) is mounted on eccentric shafts (551) with bearings (552). The lower ends of the eccentric blocks (553) are connected to the connecting blocks (554) with the help of rods. The cleaning plates (570) are mounted on the back surfaces of the connecting blocks (554). The vibration motor (550) is connected to one end of each eccentric shaft (551) and secured under each sand storage tank (501). The connecting blocks (554) and the cleaning plates (570), fixed to the connecting blocks (554), are connected to the supporting bases (544) of the rotary clamps with the help of the rotary links (542) and the connecting clamps (543). The supporting base (544) swivel clamps are installed under the tanks (501) for storing sand.

 [0062] The principle of operation of the sand distributors (500) in the first embodiment of the invention is as follows: sand is fed into the sand storage tank (501) through the sand receiving opening (508). After the sand amount sensor (509) indicates that the sand has completely filled the tank, the addition of sand is stopped. In the process of adding sand, the threaded rods (502) begin to rotate evenly as the spiral drive motors (504) move to evenly distribute the sand in all the sand storage tanks (501). At the beginning of the sand distribution process, the sand inside the sand storage tanks (501) is filtered using sand sifting tanks (560) and then evenly fed from the sand discharge holes (541). The cleaning plates (570), working synchronously, scraped scattered sand. During the distribution of sand under the drive of the vibration motors (550), the eccentric shafts (551) rotate at high speed beneath the bearing support (552) in order to drive the connecting blocks (554) to perform up-and-down movements. The connecting blocks (554) also drive the cleaning plates (570) for vibration at high frequency to simultaneously seal the sand to be removed, increasing the density and strength of sand forms. Different values of density and strength of sand forms can be obtained by adjusting the frequency and speed of rotation of the vibration motors (550).

 [0063] In another embodiment of the present invention, sand dispensers (500) have structures according to a second embodiment shown in FIG. 14-15. The sand dispenser (500) is a bidirectional sand dispensing structure. In particular, as shown in the drawings, in order to regulate the increase in the width of the sand storage tank (over 2 m), each sand storage tank (501) is formed by connecting two rectangular pipes. The space between the rectangular tubes is intended for sand storage. The tanks (501) are closed with lids (503) with the help of hinges. Covers (503) can pivot around hinges. At one end of each cover (503) there is a hole for receiving sand (508), and at the other end there is a spiral drive motor (504). Right under the covers (503) are threaded rods (502). Threaded rods (502) are connected to spiral drive motors (504) using synchronous belt pulleys (506) and synchronous belts. Sand storage tanks (501) and dependent fasteners are integrally mounted on the support base of the rotating shaft (511) using rotating shafts (512) on both sides. The support base of the rotating shaft (511) is fixed. Swinging pins (513) are mounted above the base of the rotating shaft. Support bases (514) of the cylinders are located on both sides of the sand storage tanks (501). The supporting bases (514) of the cylinders are connected to the telescopic cylinders (515) by means of clamps. The cylindrical arms of the telescopic cylinders (515) are connected to oscillating rods (513) with the help of rods. Sand storage tanks (501) and dependent fasteners can be integrally rotated around the support base of the rotating shaft (511) using telescopic telescopic cylinders (515). In the middle of the sand storage tanks (501) are installed funnels (521). The holes for sand discharge (541) are installed under the craters (521). Flat plates adjacent to the back of the sand discharge holes (541) and forming a certain angle with the horizontal plane are cleaning plates (570), the angle being 0-5 degrees and can be adjusted by telescopic cylinders (515) and restrictive blocks ( 516). The angle can be adjusted by rotating engines, rotating cylinders, toothed racks, worm gears and other methods, in addition to adjustment using telescopic cylinders, and the angle can also be adjusted manually.

 [0064] The eccentric shafts (551) are suspended from one side under sand storage tanks (501). The plurality of eccentric blocks (553) is mounted on eccentric shafts (551) with bearings (552). The other ends of the eccentric blocks (553) are connected to the funnels (521). The connecting blocks (554) are suspended under sand storage tanks (501). In the lower sections of the connecting blocks (554), grooves for elastic gas pipes (524) and cleaning plates (523) are installed. The vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed below each sand storage tank (501). Heating tubes (517) are suspended under sand storage tanks (501) and located on opposite sides of eccentric shafts (551).

 [0065] The principle of operation of sand distributors (500) in the second example of implementation is as follows: sand is fed into the sand storage tank (501) through the sand receiving hole (508). After the sand amount sensor (509) indicates that the sand has completely filled the tank, the addition of sand is stopped. In the process of adding sand, the threaded rods (502) begin to rotate evenly as the spiral drive motors (504) move to evenly distribute the sand in all the sand storage tanks (501). At the beginning of the sand distribution process, the sand inside the sand storage tanks (501) is guided by funnels (521) and then evenly fed from the sand discharge holes (541). Cleaning plates (523), working synchronously, scraped scattered sand. In the process of sand distribution under the drive of the vibration motors (550), the eccentric shafts (551) rotate at high speed under the bearing support (552) in order to drive the eccentric blocks (553) to perform up-and-down movements. The eccentric blocks (554) also drive a funnel (521) for high frequency vibration so that sand can easily flow out of the sand discharge holes (541) below the funnel (521). The dimensions of the openings for the discharge of sand (541) can be adjusted by elastic gas pipes (525). The gaps (preferably, gaps are 0-6 mm) between elastic gas tubes (525) are set by adjusting the air pressure, thereby achieving the effect of adjusting the amount of waste sand. The advantage of the second example implementation of the invention is in the implementation of the bidirectional distribution of sand. In the process of sand distribution, the angles of inclination (from -5 to 5 degrees) formed by the cleaning plates (523) and horizontal plane are adjusted by controlling the sizes of the telescopic cylinders (515) and the positions of the limiting units (516), thereby eliminating idle sand distribution (500) and increasing the efficiency of the device for three-dimensional printing of sand forms. Heating tubes (517), located under the sand storage tanks (501), can heat the printed material in accordance with the printing requirements. Different values of sand mold strength and curing time can be obtained by adjusting the heating temperature. The arrangement and methods of operation of the heating tubes (517) are simultaneously applicable to any case in which printed materials and sand forms need to be heated in a device for three-dimensional printing of sand forms.

 [0066] In another embodiment of the present invention, the printhead assembly (640) has the structure shown in FIG. To complete the three-dimensional printing, the printhead assembly (640) mainly moves along the X axis and along the Y axis. Magnetic rail guides (625) are attached to the main support frame (622) in the X axis direction. Rail guides (616) are mounted on magnetic rail guides . Linear motors of the X axis (627) are connected to the sliding blocks of the rails (614) and the main connecting bases of the XY axis (628) with the help of bolts. The modules controlling the printhead in the direction of the Y axis are driven by linear motors, thereby driving the entire printhead (640) to move along the X axis. The side surfaces of the rail guides are mechanically fastened with the main support frame of the X axis (623) and protective plates of the main rail axis X (624) and (626). Since the design of the device for three-dimensional printing is too large, and one supporting frame of the X-axis is not enough, auxiliary supporting frames of the X-axis (611) are provided, configured on both sides, and the supporting frame of the auxiliary X-axis rail is installed on the device for three-dimensional printing (612) for fixing rail guides (616). The sliding blocks (614) on the rails are connected to the auxiliary connecting bases of the X axis (615) using bolts to ensure the movement of the printhead assembly (640) in the direction of the X axis. The side surfaces of the rails are fastened by the auxiliary rail guide X (613) sliding blocks rail guide axis X (614) and the plate of the auxiliary support frame of the axis X (618). The X-axis main support frame (622) and the X-axis support frames (611) determine the stroke of the X axis in which the printhead assembly (640) operates to provide rigidity to the X-axis of the printhead. The support frame is connected to the main frame of the device for three-dimensional printing with the help of an auxiliary locking plate of the X axis (619) and the main locking plate of the X axis (621) to ensure that the X axis of the printhead assembly (640) of the device for three-dimensional printing is in the range the course of the entire device. The motors controlling the printhead in the direction of the Y axis (631) are connected to the modules controlling the printhead in the direction of the Y axis using fixing plates of the Y axis (632). The motor drives the movable connecting plate of the Y axis (634) to move in the direction of the Y axis to realize movement in the Y direction of the printhead assembly (640).

 [0067] The principle of operation of the printhead (600) is as follows: the printhead assembly (640) is driven by linear motors in the main support devices of the X axis (620) for moving along the X axis. To ensure accurate positioning of the printhead assembly (640 ) in the direction of the X-axis uses a magnetic measuring line. Auxiliary devices of the X axis (610) are installed on both sides to provide an auxiliary support for the entire frame to ensure the rigidity of the print head and the body of the three-dimensional printing device. The printhead assembly (640) realizes movement along the Y axis using Y-axis blocks. The gauge ensures precise positioning of the system in the Y-axis direction. The X axis is aligned with the Y axis, so the printhead assembly (640) realizes the corresponding movement in accordance with defined plan.

 [0068] In another embodiment of the present invention, the cleaning device (700) has the structure shown in FIG. 17-18 and is installed in a predetermined position of the device for the three-dimensional printing of sandy forms using the base plate (714). The cleaning plate (712) is held in front and behind by two support rods (713) with bolts. The flatness and height of the cleaning plate (712) are set by the horizontal adjustment spring of the cleaning plate (721) to ensure the flatness and distance between the plane of the printhead and the cleaning plate (712) in a device for three-dimensional printing of sand forms. The spongy material (741) of the porous structure (740) is horizontally placed on the base plate of the porous structure (742). The base plate of the porous structure (742) is held by the compression spring (743). The height of the sponge material (741) can be adjusted by extending the compression spring (743). The tank for cleaning the printhead (730) is installed under the cleaning plate (712). A sealing tank (735) is formed between the tank for cleaning the printhead (730) and the cleaning plate (712). The chrome-plated shaft (732) is installed at the front and rear of the tank for cleaning the printhead (730). On the chrome-plated shaft (732) are located the cleaning strips (733) and the mounting plate of the cleaning strips (734), while the two cleaning strips (733) clamp the mounting plate (734) with bolts. Finally, the mounting plate of the cleaning strip (734) is mounted on the chrome-plated shaft (732) using mounting screws. A fluid sensor (731) is used to determine the presence of a cleaning fluid and to determine if some of the cleaning strips (733) have been soaked with cleaning fluid. Sheet clamping mechanisms (720) are held and mounted on the support rods (713) by means of horizontal adjustment springs for the compression of the cleaning plate (721). The height of the support plates (723) can be adjusted by the horizontal adjustment springs of the compression cleaning plate (721) to ensure that the support plates (723) and the cleaning plate (712) lie in the same plane.

 [0069] The principle of operation of the cleaning device (700) is as follows: when cleaning the print head in a device for three-dimensional printing of sand forms is required, the cleaning device moves over the tank for cleaning the print head (730) in the X-axis direction; cylinders (750) turn left and right to rotate the chrome shafts; when a certain angle is formed between the cleaning strips (733) on the chrome-plated shafts and the printhead, the printhead is cleared; the waste liquid obtained after cleaning the print head is collected using the waste liquid collection tank (715), after which it is drained. When it is necessary to adjust the degree of accuracy of the print head of a device for three-dimensional printing of sand forms, the print head moves over the sheet clamping mechanism (720), the accuracy of the print head is adjusted straightness, in which the powder is fed by the print head to the sheet in a straight line. When the need arises to disable the device for the three-dimensional printing of sand molds for maintenance of the device, the print head can be moved over the sponge-like structure (740); and the liquid material in the sponge material (741) may keep the bottom surface of the printhead moist for a long time to prevent the printhead from blocking.

 [0070] In another embodiment of the present invention, the fluid supply system (800) has the structure shown in Fig. 19 and includes a mounting bracket 810 (not shown), a first fluid supply system 820, a waste liquid removal system 830, a cleaning system 840, a second fluid supply system 850 and other auxiliary devices 860. The first fluid supply system 820 includes a first additional section 821, a primary filter 822, a first engine 823, a first storage tank 824, a second engine 825, a secondary filter 826, p The first solenoid valve 827, the first metering valve 828 and the first actuator 829. The waste liquid removal system 830 includes various waste liquid collection sites 831, the second electromagnetic valve 832, the third engine 833, the manifold 834, the first filter 835, the fourth engine 836, check valve 837 and recovery section 838. Cleaning system 840 includes a cleaning agent addition section 841, a second filter 842, a third filter 843, a second storage tank 844, a fifth engine 845, a third electromagnet The second valve 846, the second metering valve 847, and the cleaning section 848. The second fluid supply system includes a second additional section 851, a fourth filter 852, a valve 853, a third storage tank 854, and a second actuator 855. Other accessories include a sensor position 861 (not shown), the first pressure sensor 862 (not shown), the second pressure sensor 863 (not shown), the third pressure sensor 864 (not shown) and the enclosure 865 (not shown).

 [0071] The principle of operation of the fluid supply system (800) is as follows: the additional areas and areas of recovery are located in one place, and their number is not limited. Storage tanks, respectively, have one body and many barrier layers, and are not limited in quantity. All liquid storage tanks are located in the same housing. All motors and filters are mounted on tanks using circuit boards. All components are connected by tubes and connections to provide a single circuit.

 [0072] The feed systems are separate circuits installed in storage tanks from external extension sites, as appropriate. The waste liquid disposal system is the only disposal system. All waste liquid, whether it is a single or multiple waste liquid, is collected in tanks for storing waste liquid in an appropriate manner and is discharged accordingly. More preferably, a single pressure sensor is located at the bottom of a separate tank to determine the amount of fluid in the storage tank at any time. More preferably, the upper parts of the storage tanks are connected to reservoirs for collecting waste liquids by tubes to ensure that all of the liquid is added to the tanks for collecting the spent liquid after adding an excess amount of liquid material. More preferably, position sensors 861 are located in the upper portions of the waste liquid collection tanks to determine the height of the liquid in the waste liquid collection tank at any time.

 [0073] In another embodiment of the present invention, the sand blending device (900) has the structure shown in FIG. 20-24, and includes sand pumping pumps (910), sand storage tanks (920), main body (930), sand mixing tank (940), sand tanks (950), and the like. Sand pumping pumps (910) are installed above sand storage tanks (920) and compacted. A sand mixing tank (940) is placed under sand storage tanks (920). The sand mixing tank (940) is suspended inside the main body (930) on a transverse beam. Sand storage tanks (920), a sand mixing tank (940) and sand tanks (950) are built into the main body (930). The control cabinet (931), the support base of the fluid supply system (932), etc., are respectively installed on both sides of the main body (930). The weight sensor, motor and control valve are controlled by a control cabinet (931).

 [0074] The sand blending device (900) includes two sand pumping pumps (910), two sand storage tanks (920) and two tanks (950), each of which is controlled individually without affecting each other, increasing not only the volume of sand stored, but also ensuring the synchronous operation of a single sand distributor and a multitude of sand distributors, and increasing the efficiency of the device. Sand storage tanks (920), a sand mixing tank (940) and sand tanks (950) are built into the main body (930). The main body (930) also includes a control cabinet (931), a support base for the fluid supply system (932) and the corresponding sensors, motors and control valves controlled by the control cabinet (931).

[0075] The principle of operation of the sand storage tank (920) is as follows: when starting up the device for the three-dimensional printing of sand forms, the pumping ventilation (910) starts; sand enters the sand storage tanks (920) through the inlet tubes (921) of sand storage tanks (920) under the action of sand pumping pumps (910); mass sensors (922) installed around the bottom of sand storage tanks (920), measure and signal a weight change; when the weight of the sand in the sand storage tanks (920) reaches the set value, the mass sensors (922) send a signal, and the sand pumping pumps (910) stop working. When the sand in the sand storage tanks (920) reaches the set value, the first control valve (923) opens automatically; the vibration motor starts (924); sand enters the sand mixing tank (940) through the inlet tube of the sand mixing section (941); and, in the meantime, the liquid material enters the tank for mixing sand (940) through a tube in a certain ratio (3-20%). A motor (943) on the bottom of the sand mixing tank (942) drives the mixing paddles (949) to rotate at high speed. After uniform mixing of sand and liquid material, the air cylinder (944) lifts the coupling bracket (945), which facilitates the opening of the sealing unit (946). Mixed sand and liquid material enter sand storage tanks (950). The second control valve (952) opens. The second vibration motor (953) starts to work. The sand enters the sand distributors (500) through the guide metal plates (951). A sensor (948) detects sand in sand distributors (500). After reaching the specified height, the second control valve closes; and the second vibration motor (953) stops working. The above steps are repeated to implement continuous automatic suction of sand, mixing sand and adding sand.

 [0076] The sand mixing container (940) is structurally divided into an upper part (947) and a lower part (942), which are joined together at the same end. The bottom of the sand mixing tank (942), due to frequent contact with sand, is made of stainless steel and other wear-resistant and corrosion-resistant materials. The internal cavity of the lower part of the sand mixing tank is covered with wear-resistant material to improve wear resistance and extend service life. In this case, when the container wears out, it is necessary to replace only the lower part (942) of the container, which simplifies the replacement and contributes to economy. The sand discharge hole is sealed with an annular arcuate sealing unit (946); at the same time, sealing strips are additionally placed on the sealing blocks to prevent fine sand from flowing out of the gaps. Mixing blades (949) are formed by combining a circular arc with a curved flat plate to increase the area of ​​mixing, increase the efficiency of mixing and ensure uniform mixing.

INDUSTRIAL APPLICABILITY

[0077] In the above description of the present invention, a detailed description is given of a device for three-dimensional printing of sand molds containing a plurality of working chambers. The principles and methods for implementing this application are described by applying the embodiments in the present invention. The drawings of the above embodiments are used only to help understand the method and its basic concept in the present application. Meanwhile, those skilled in the art can make some changes to a particular implementation method and scope in accordance with the concept of the present invention. In conclusion, the content of the present description should not be understood as limiting the present application.

Claims (16)

1. Device for three-dimensional printing of a sandy form with several working chambers, comprising a frame of the main body (100), supply systems for the working chamber (200), working chambers (300), mechanisms for moving the working chambers (400), sand distributors (500), printing a head (600), a device for mixing sand (900) and an electrical system, while the frame of the main body (100) includes at least three vertical columns with the formation of at least two independent working areas, at the bottom of each of which mechanisms for moving the working chambers (400) are installed, the feed systems of the working chambers (200) are located above each of the mechanisms for moving the working chambers (400) with the possibility of moving the working chambers (300) along the Y axis direction, and the working chambers (300) include lower movable plates mounted with the ability to be set in motion by the mechanisms for moving the working chambers (400) in the Z-axis direction, moreover Above each of at least three vertical columns of the frame of the main body (100) there are respectively sand distributor control modules (510), which are connected by at least two connecting beams (530) connected with drive engines of sand distributor (520), at least two sand distributors (500) are fixed above sliding plates corresponding to at least three sand distributor control modules (510), the corresponding number of sand distributors (500) are adapted to be driven in synchronous motion in the direction along the Y axis with the help of drive motors of the sand distributor (520), and the corresponding number of working chambers (300) are located below each of at least two sand distributors (500), while A linear motor is installed in the upper part of the frame of the main body (100) with the ability to move the print head in the X direction (620), the print head (600) is connected to the module that controls the movement of the print head using the servo motor in the Y direction (633) and placed below the mentioned linear motor, and a device for mixing sand (900) is installed outside the upper part of the frame of the main body (100) with the ability to supply sand to sand distributors (500). 2. The device according to claim 1, characterized in that the supply systems of the working chamber (200) include at least three support beams for installing roller bearings (210), which are mounted on support columns (250), on one side of each said beam fixed mounting plate (221), and the mounting plates are connected to the supporting shafts (226), the rollers (225) are rigidly connected to the sprockets (222) and rigidly fixed to the supporting shafts (226) using bearings (223), and the bearings (223) installed with locking clamping rings (224), with the capacity for receiving sand (270) is installed between the support beams to install roller bearings (210) with the ability to receive sand flowing from the working chambers (300), and motors (261) are installed on the bases for mounting the engine (262), with one side of each engine (261 ) mounted on one support beam for installing roller bearings (210), and the other side is connected to another beam for mounting roller bearings (210) using connecting beams (260), while the positioning mechanism of the working chamber (290) is mounted on the frame of the main body (100) with the possibility of reg stitching the working position of the working chambers (300). 3. The device according to claim 1, characterized in that the working chambers (300) include inner shells, housings, sealing frames, support frames and felt sheets, the inner shells are made of wear-resistant materials, the housings are made of rigid materials, sealing frames installed around the upper part and on the same level with sand distributors with the possibility of eliminating sand leakage around the working chambers when sand is distributed, and the supporting frames are placed around the bottom and on the lower surface to support and restrict the adjacent their structures when moving the base (323) to the lower parts, while the felt sheets are installed in the upper sections around the bases of the working chambers (323) and bolted together using pressure plates with a tight connection to the adjacent inner shells so that no sand leaks from the bases of the working chambers while driving. 4. The device according to claim 1, characterized in that the mechanisms for moving the working chambers (400) include frames (410), servomotors (420), lifting mechanisms (430) and transmission mechanisms (440), while servomotors (420) , lifting mechanisms (430) and transmission mechanisms (440) are mounted on frames (410), which consist of left side supports (411), lower supports (412), right end supports (413) and motor bases (414), servomotors ( 420) are connected to the driving wheels (442) by means of the motor connecting shafts (441), and the driving wheels (442) are connected to the driven wheels (445) using belts (444), which have the possibility of tension during rotation by compressing wheels (443), with the driven wheels (445) connected to the pivoting levers (432) with the ability to transfer rotation to them, the upper ends and lower ends of the pivoting levers (432) are fixed floating bearings (435) and fixed bearings (431), and on the swivel levers (432) screw nuts (433) are installed with the ability to move up and down along the thread during rotation of the swivel levers, with screw nuts (433) using connecting blocks (434) connection The yen lifting plates (438), sliding blocks (416) are mounted on the lifting plates (438) with the ability to move along vertical rail guides (415), and at the upper ends of the lifting plates (438) there are auxiliary blocks and screw jacks to support the working chambers ( 300) in the process of movement, and the adjusting screw jacks (437) are made with the ability to control the position to ensure the horizontal movement of the working chambers (300). 5. The device according to claim 1, characterized in that the sand distributors (500) include sand storage tanks (501), which are covered with lids (503), and at one end of each cover (503) there is an opening for receiving sand ( 508), and at the other end there is a spiral drive motor (504), under the covers (503) threaded rods (502) are placed, which are connected to the spiral drive motors (504) using synchronous belts (506) and their pulleys, while in the middle sand storage tanks (501) sand sifting tanks (56 0), under which there are holes for unloading sand (541), and the cleaning plates are located behind the holes for unloading sand (541) at an angle with a horizontal plane, and on one side eccentric shafts (551) are suspended under sand storage tanks (501) , on which, using bearings (552), a plurality of eccentric blocks (553) are installed, and the lower ends of eccentric blocks (553) are connected to connecting blocks (554), while cleaning plates (570) are installed on the rear surfaces of connecting blocks (554), with one end each eccentric shaft (551) is connected to a vibromotor (550), which is fixed under each sand storage tank (501), connecting blocks (554) and cleaning plates attached to them (570) are connected to the supporting bases of the rotary clamps (544) by means of rotary links (542) and connecting clamps (543), and the supporting base of the rotary clamps (544) are installed under sand storage tanks (501). 6. The device according to claim 1, characterized in that the sand distributors (500) include sand storage tanks (501), which are covered with lids (503), at one end of each of which a hole is made to receive the sand (508), and at the other end there is a spiral drive motor (504), while under the covers (503) threaded rods (502) are placed, connected to the spiral drive motors (504) using synchronous belts (506) and their pulleys, tanks (501) for sand storage and dependent fasteners are integrally mounted by turning Rolling shafts (512) located on both sides of the supporting base of the rotating shaft (511) and the supporting base of the rotating shaft (511) are fixed, with swinging rods (513) installed on the supporting base of the rotating shaft (on both sides of sand storage tanks). 501) support bases (514) of cylinders are located, which are connected to telescopic cylinders (515) by means of clamps, and cylindrical levers of telescopic cylinders (515) are connected to oscillating rods (513) by means of pins, while the tanks are stored Sand (501) and dependent fasteners are made with the possibility of integral rotation around the support base of the rotating shaft (511) using telescopic movement of telescopic cylinders (515), and funnels (521) are installed in the middle of the sand storage tanks (501), under which there are holes for unloading sand (541) and cleaning plates located on both sides of the holes for unloading sand (541) at an angle with a horizontal plane, and on one side under the tanks for storing sand (501) an eccentre is suspended forged shafts (551), on which, using bearings (552), a plurality of eccentric blocks (553) are installed, and the other ends of eccentric blocks (553) are connected to funnels (521), while the connecting blocks (554) are suspended under sand storage tanks (501), in the lower sections of the connecting blocks (554) there are slots for elastic gas tubes (524) and cleaning plates (570); a vibrating motor (550) is attached to one end of each eccentric shaft (551), fixed below each sand storage tank (501), and under storage tanks Eska (501) are suspended heating tubes (517) with the location on opposite sides of the eccentric shaft (551). 7. The device according to claim 1, characterized in that magnetic rail guides (625) with rail guides are attached to the main support frame (622) in the X direction, linear print displacement motors in the X direction (620) are connected to sliding blocks (614) of the rails and the main connecting bases of the XY axis (628) on the rails, while the modules controlling the movement of the print head in the Y axis direction (633) are designed to be driven by linear motors, The drive of the entire printhead (640) along the X axis and the side surfaces of the guide rails are mechanically fastened with a plate of the main support frame of the X axis (623) and protective plates of the main rail guide of the X axis (624) and (626), with auxiliary support frames The X axis (611) is mounted on either side of the main support frame of the X axis, the support frame of the auxiliary X-axis rail guide (612) is mounted on the X-axis main support frame for mounting rail guides (616), and the sliding rail guide blocks (614) connect are not connected with the auxiliary connecting bases of the X axis (615) with the help of bolts ensuring the movement of the printhead assembly (640) in the direction of the X axis, while the lateral surfaces of the rail guides are fastened with the auxiliary rail axis X (613) plate, sliding blocks (614) of the rail the X-axis and the plate of the auxiliary support frame of the X-axis (618), the support frame is connected to the frame of the main body with the help of the auxiliary fixing plate of the X-axis (619) and the main fixing plate of the X-axis (621) with the provision of driving the X axis of the printhead assembly (640) throughout the entire range of its movement, and the motors moving the printhead in the direction of the Y axis (631) are connected to the modules controlling the printhead in the Y direction, using the fixing plates of the Y axis (632 ), moreover, the movable connecting plate of the Y axis (634) is configured to be driven from the engine to ensure movement of the printhead assembly (640) in the direction of the Y axis. 8. The device according to claim 1, characterized in that it further comprises a cleaning device (700), fixedly mounted on a support plate (714), while the cleaning plate (712) in front and behind is connected to two support rods (713), on the base plate of the porous structure (742) is horizontally placed spongy material (741) with a porous structure (740), and the base plate of the porous structure (742) is installed with the maintenance of its compression spring (743), and a cleaning tank is installed under the cleaning plate (712) printhead (730), between which and the cleaning p A sealing tank (735) is formed with astine (712), a chrome-plated shaft (732) is installed next to the tank for cleaning the printhead (730), on which cleaning strips (733) and fixing plates of cleaning strips (734) are located, with two cleaning strips (733) are bolted to the mounting plate (734), which is mounted on the chrome-plated shaft (732) with mounting screws, and the cleaning device includes a fluid sensor (731), configured to detect the presence of cleaning fluid and impregnate part of the cleaning strips (733 ) cleaning liquid, and the mechanisms for clamping sheets (720) are installed with the possibility of holding on the support rods (713) by means of horizontal adjustment springs of the compression cleaning plate (721), and the support plates (723) are installed with the possibility of adjusting their height by the horizontal adjustment springs of the cleaning plate ( 721) for placing the support plates (723) and the cleaning plate (712) in the same plane. 9. The device according to claim 1, characterized in that it further comprises a fluid supply system (800), including a mounting support, a first liquid material supply system, a waste liquid recovery system, a cleaning system, a second liquid material supply system, auxiliary devices , the first liquid supply system includes the first additional section, the primary filter, the first engine, the first storage tank, the second engine, the secondary filter, the first electromagnetic valve, the first re a flow monitor and a first actuator, a waste fluid recovery system includes fluid collection sites, a second solenoid valve, a third engine, a storage unit, a first filter, a fourth engine, a one-way valve and a recovery section, the cleaning system includes a cleaning agent addition section, the second filter, third filter, second storage tank, fifth engine, third solenoid valve, second regulator and cleaning section, second fluid supply system including into a second extension portion, the fourth filter, the valve, the third storage vessel and a second actuating element, the auxiliary devices include a position detection sensor, the first sensor detecting the pressure, the second pressure detection sensor, the third sensor detecting the pressure and the enclosure. 10. The device according to claim 1, characterized in that the device for mixing sand (900) includes two pumps for pumping sand (910), two tanks for storing sand (920), a main body (930), a tank for mixing sand ( 940) and two sand tanks (950) in which sand pumping pumps (910) are installed above the sand storage tanks (920), while the sand mixing tank (940) is placed under the sand storage tanks (920), the tank for mixing sand (940) is suspended inside the main body (930) on the crossbeam, and the capacity for storing sand (920), the reservoir p for mixing sand (940) and sand tanks (950) are built into the main body (930), and said sand pumping pumps (910), sand storage tanks (920) and sand tanks (950) are individually adjustable .

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