UA122408C2 - Sand-mold 3d printing device with multiple working boxes - Google Patents

Abstract

A sand-mold 3D printing device with multiple working boxes, comprising: a main frame (100), a working box transport system (200), working boxes (300), a working box lifting mechanism (400), a sanding machine (500), a printing head (600), a cleaning means (700), a liquid material system (800), a sand mixing means (900), and an electric system. The printing device comprises two or more working boxes together with a sand mixing tank, a synchronously operated sanding machine, a through-type printing head, a synchronous working box lifting mechanism, an electric system and so on matching with the working boxes. During sanding and printing operations, the two or more working boxes work synchronously. Compared with a sand-mold 315 printing device with a single working box of the same specification, the printing efficiency of the sand-mold 3D printing device with multiple working boxes is improved by times in equal time, so that the costs of the sand mold are reduced and the production needs are satisfied more quickly.

Description

The field of technology

ИО0О1| The present invention belongs to the field of ZO printing, generally applicable to the field of ZO printing of sand molds for casting, and in particular relates to a device for ZO printing of sand molds with several working boxes, which has several working boxes and is made with the possibility of simultaneous printing.

PRIOR ART 00021 Currently, devices for ZO printing of sand molds generally have problems related to low printing efficiency, high time consumption, and non-compliance with production requirements. The main reasons are that sand mold printing devices have similar structural composition and each device consists of one working box, sand distributor, printing head and other functional modules; the working sequence of all functional modules and the required time are also generally fixed; and the printing efficiency of the sand mold printing device with one working box can be improved in the aspects of increasing the size, increasing the working speed, and the like. However, the scope for changing the size and operating speed of the device is limited, and the effect achieved by using the above method of increasing the printing efficiency is not ideal and still cannot meet the requirements of production. It is extremely necessary to offer a feasible solution that can double the printing efficiency for the rapid development of the field of application of ZO printing of sand forms. Despite the fact that in the prior art in the patent literature with the publication number СМ20О3887169) a production line for ZO printing is disclosed and at least two working boxes are made with the possibility of increasing the efficiency of printing, the technology is the result of early research by the applicants and the design actually provides, in its queue, two or more working boxes for printing. If one work box completes the printing operation, another empty work box can quickly fill the empty space to continue printing, so that only one work box can print at the same time, while the simultaneous sand distribution and printing of multiple work boxes is not performed. In addition, the prior art has defects in devices such as a print head, a sand distributor, a drive device, and the like, and cannot meet the need for simultaneous printing. Thus, a problem in this field of technology that desperately needs to be solved is the development of a device for printing 30 sand forms with several working boxes, having several working boxes and made with the possibility of simultaneous printing.

Technical solutions 0003) The device for ZO printing of sand forms provided by this invention contains two or more working boxes, it combines a tank for mixing sand, a synchronously operating sand distributor, a through-type print head, a synchronous mechanism for lifting the working box, an electrical system and etc., corresponding to the work boxes, enables the simultaneous operation of two or more work boxes during the sand distribution and printing operation, and can double the printing efficiency at the same time compared to the sand mold ZO printing device with one work box in the same design thereby effectively reducing sand mold costs and meeting production requirements faster.

I0004| To solve the above-mentioned technical problems, the present invention provides the following technical solutions. 0005) The device for ZO printing of sand forms with several working boxes contains: frame (100) of the main body, systems (200) for transporting working boxes, working boxes (300), mechanisms (400) for lifting working boxes, distributors (500) of sand , a print head (600), a cleaning device (700), a liquid supply system (800), a sand mixing device (900), and an electrical system, and 0006) the frame (100) of the main body includes at least three vertical columns. The frame of the main body is assembled to form two or more independent working areas. A mechanism unit (400) for lifting work boxes is appropriately installed at the bottom of each work area.

I0007| The unit of the system (200) for transporting the work boxes is placed above each mechanism (400) for lifting the work boxes to drive the movement of the work boxes (300) along the direction of the U axis. 0008) The work boxes (300) contain lower plates, which are movable plates, and can be brought up for lifting along the direction of axis 2 with the help of mechanisms (400) for lifting working boxes.

I0009| The sand spreader control modules (510) are suitably located above each of at least three vertical columns of the main body frame (100).

At least three sand distributor control modules (510) are connected by means of at least two connecting means (530). The connecting means are connected to the drive motors (520) for controlling the sand distributors. At least two sand spreaders (500) are fixed above the sliding blocks corresponding to at least three sand spreader control modules (510). A corresponding number of sand distributors (500) are actuated synchronously along the direction of the M axis by means of drive motors (520) for controlling the sand distributors. A corresponding number of working boxes (300) are suitably located below each of the at least two sand distributors (500).

I0010)| Inside the upper part of the frame (100) of the main body, a linear motor (620) is installed to drive the print head in the X direction. A module (633) to drive the print head in the M direction is installed below the linear motor (620) to drive the print head in the X direction. ) is connected to the Y-direction print head control module (633). The print head (600) can move in the X-axis direction and in the M-axis direction by driving the X-direction print head control linear motor (620) and the servo motor ( 631) control of the print head in the U direction.

I0011) The device (900) for mixing sand is installed outside the upper part of the frame (100) of the main body to supply sand in the distributor (500) of sand. 00121 In addition, systems (200) for transporting work boxes include at least three roller mounting beams (210). Roller mounting beams (210) are supported by support posts (250). The mounting base (221) is fixed to one side of each roller mounting beam (210). Mounting bases are connected to supporting shafts (226). The rollers (225) are fixedly connected to the wheels (222) of the chain transmission and fixedly installed on the support shafts (226) with the help of bearings (223). Finally, the bearings (223) are fixed with the help of closing springs (224). Between the roller mounting beams (210) are installed containers (270) for receiving sand, which are designed to receive sand seeping from the working boxes (300). After assembling the motors (261) with the motor mounting bases (262), one side of each motor (261) is fixedly mounted on one roller mounting beam (210), and the other side is connected to another roller mounting beam (210) by means of connecting means (260). A mechanism (290) for placement is installed on the frame (100) of the main body

From the working boxes, which is intended for adjusting the working positions of the working boxes (30) in the device for ZO printing of sand molds.

ЙО013| In addition, the work boxes (300) contain inner linings, housings, sealing frames, support frames and hair felts, and the inner linings are made of water-resistant materials. The cases are made of hard materials. Seal frames are fitted around the top and are flush with the sand distributors to ensure that no sand seepage occurs around the work boxes during sand distribution. Support frames are installed around the bottom and on the bottom surface to support the surrounding structures and limit when the bases (323) are moved to the lowest parts. The piles are mounted on the tops around the bases (323) of the work boxes and are bolted down using pile pressure plates so that the piles are snugly inserted into the surrounding inner linings to ensure that movement from the bottoms of the work boxes does not occur. sand seepage. 0014) In addition, mechanisms (400) for lifting working boxes include frames (410), servo motors (420), lifting parts (430) and transmission mechanisms (440). Servomotors (420), lifting parts (430) and transmission mechanisms (440) are mounted on frames (410). Frames (410) consist of left brackets (411), lower brackets (412), right brackets (413) and bases (414) of the engines. Servo motors (420) actuate the drive wheels (442) to drive the connecting shafts (441) of the motor. Drive wheels (442) actuate driven wheels (445) for joint movement by means of belts (444). Belts (444) are tensioned by compression wheels (443) during rotation. The driven wheels (445) are connected to the screw levers (432) by means of welding, and also drive the screw levers (432) into rotation. The upper and lower ends of the screw arms (432) are fixed with floating bearings (435) and fixed bearings (431). Nuts (433) are installed on screw levers (432). Together with the rotation of the screw levers, the nuts (433) move up and down along the threads. Lifting plates (438) are connected to nuts (433) using connecting blocks (434). Sliding blocks (416) are mounted on lifting plates (438). Sliding blocks (416) slide along vertical guide rails (415). Support blocks and adjusting screw jacks are placed on the upper ends of the lifting plates (438) to support the working boxes (300)

during the entire movement process. The positions of the adjusting screw jacks (437) are controlled to maintain the working boxes (300) in a horizontal position. 0015) In addition, the sand dispensers (500) contain sand containers (501) for storing sand. Positions above containers (501) for sand are connected to overlay plates (503). At one end of each overlay plate (503) is formed a hole (508) for receiving sand, and at the other end of each overlay plate is mounted a spiral drive motor (504). The screw rods (502) are located directly below the overlay plates (503).

The screw rods (502) are connected to the helical drive motors (504) by means of synchronous belt pulleys (506) and synchronous belts. Containers (560) for dispersing sand are formed in the middle of containers (501) for sand. Sand discharge holes (541) and sand scraping plates, adjacent to the rear parts of the sand discharge holes (541) and forming an angle with the horizontal plane, are installed below the sand dispersion containers (560). The eccentric shafts (551) are on one side below the containers (501) for sand.

A plurality of eccentric blocks (553) are mounted on eccentric shafts (551) with bearings (552). The lower ends of the eccentric blocks (553) are connected to the connecting blocks (554). Plates (570) for scraping sand are installed on the back surfaces of the connecting blocks (554). A vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed below each container (501) for sand. The connecting blocks (554) and sand scraping plates (570) fixed above the connecting blocks (554) are connected to the support bases (544) of the rotary pin shaft by means of oscillating rings (542). and connecting pin shafts (543). The support bases (544) of the rotary pin-shaft are installed below the containers (501) for sand. 0016) In addition, the sand dispensers (500) contain sand containers (501) for storing sand. Positions above containers (501) for sand are connected to overlay plates (503). At one end of each overlay plate (503) is formed a hole (508) for receiving sand, and at the other end of each overlay plate is mounted a spiral drive motor (504). The screw rods (502) are located directly below the overlay plates (503).

The screw rods (502) are connected to the spiral drive motors (504) by means of synchronous belt pulleys (506) and synchronous belts. The sand containers (501) and their mounting parts in operation are mounted integrally in the base (511) to support the rotary shaft by means of rotary shafts (512) on both sides. The base (511) for supporting the rotary shaft is fixed. Swing rods (513) are mounted above the base to support the rotating shaft. The bases (514) for supporting the cylinders are on both sides of the containers (501) for sand. The bases (514) for supporting the cylinders are connected to the telescopic cylinders (515) by means of pin shafts. The levers of the telescopic cylinders (515) are connected to the swinging rods (513) by means of pins. The sand containers (501) and their mounting parts in action can be brought to co-rotate around the base (511) to support the rotating shaft by telescoping the telescoping cylinders (515). Funnels (521) are installed in the middle of containers (501) for sand. Sand discharge holes (541) and sand scraping plates (570) adjacent to both sides of the sand discharge holes (541) and forming an angle with the horizontal plane are installed below the funnel (521). The eccentric shafts (551) are on one side below the containers (501) for sand. A plurality of eccentric blocks (553) are 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 below the containers (501) for sand. Grooves (524) of the flexible gas line and plates (570) for scraping sand are installed on the lower parts of the connecting blocks (554). A vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed below each container (501) for sand. The heating pipes (517) are located below the containers (501) for sand and are placed on the opposite sides of the eccentric shafts (551). 00171 In addition, magnetic guide rails (625) are attached to the X-axis main support frame (622). The guide rails are mounted on magnetic guide rails. The linear motors (620) of the X-axis are connected to the sliding blocks (614) of the guide rail and the main connecting bases (628) of the X-axis on the guide rails. The Y-axis modules (633) are actuated for movement by linear motors, thereby actuating the entire printhead assembly (640) for X-axis movement. The peripheries of the guide rails are mechanically sealed by the overlay plates (623) of the X-axis main support frame, overlay protective plates (624) of the main guide rail of the X axis and limiters (626) of the main guide rail of the X axis. Auxiliary support frames (611) of the X axis are made on both sides of the main support frame of the X axis. Auxiliary support frame (612) of the guide rail of the axis X is mounted on the main support frame of the X-axis to fix the guide rails (616). The guide rail slide units (614) on the guide rails are combined with the X-axis auxiliary coupling bases (615) by means of bolts to assist in driving the printhead assembly (640) in the X direction. The peripheries of the guide rails are sealed by the auxiliary guide stops (613) X-axis rails, sliding blocks (614) of the guide rails and overlay plates (618) of the X-axis auxiliary support frame.

The support frame is connected to the structure of the main body of the 3D printer by means of the auxiliary X-axis fixing plate (619) and the main X-axis fixing plate (621) to ensure that the X-axis of the printer assembly (640) is within the travel range of all 30 of the printer. The M-axis motors (631) are connected to the X-axis modules (633) by means of the Y-axis locking plates (632). The power of the motor drives the XM-axis movable connecting plate (634) to move in the Y direction so as to ensure the movement of the printhead assembly (640) in the U direction. 0018) In addition, the cleaning device (700) is fixedly installed with the support plate (714). The cleaning plate (712) is supported at the front and rear by two support beams (713). The sponge (741) in the sponge mechanism (740) is located horizontally on the support plate (742) for the sponge. The sponge support plate (742) is supported by a compression spring (743). A bath (730) for cleaning the print head is installed below the cleaning plate (712). A sealing container (735) is formed between the bath (730) for cleaning the print head and the plate (712) for cleaning. A chrome shaft (732) is placed near the bath (730) for cleaning the print head. The cleaning strips (733) and the cleaning strip mounting plate (734) are mounted on the chrome shaft (732), and the two cleaning strips (733) are bolted to the cleaning strip plate (734). Finally, the plate (734) for the cleaning strip is mounted on the chrome shaft (732) using the set screws. The liquid material sensor (731) is used to detect whether the cleaning liquid is placed in place and to ensure that a portion of the cleaning strips (733) is wetted in the cleaning liquid. The paper clamping mechanisms (720) are also supported and mounted on support beams (713) by compression springs (721) for horizontal adjustment

From the cleaning plate. The heights of the paper support plates (723) can be adjusted using compression springs (721) to horizontally adjust the cleaning plate to ensure that the paper support plates (723) and the cleaning plate (712) meet the same flatness requirements.

I0019) In addition, the fluid supply system (800) includes a mounting bracket, a first liquid supply system, a spent liquid regeneration system, a cleaning supply system, a second liquid supply system and other auxiliary devices, and a first liquid supply system of liquid material includes a first addition point, a primary filter, a first motor, a first storage box, a second motor, a secondary filter, a first solenoid valve, a first flow control valve, and a first actuator. The waste fluid regeneration system includes various waste fluid collection points, a second solenoid valve, a third motor, a collection box, a first filter, a fourth motor, a one-way valve and a regeneration point.

The cleaning delivery system includes a cleaning agent addition point, a second filter, a third filter, a second storage box, a fifth motor, a third solenoid valve, a second flow control valve, and a cleaning point. The system for supplying the second liquid material includes a second addition point, a fourth filter, a valve, a third storage box and a second actuator. Other auxiliary devices include a detection position switch, a first pressure detection switch, a second pressure detection switch, a third pressure detection switch, and a welding chamber.

I0020| In addition, the sand mixing device (900) includes sand suction pumps (910), sand storage tanks (920), main body (930), sand mixing tank (940) and sand containers (950), and the pumps (910) for sand suction are installed above the sand storage tanks (920). The sand mixing tank (940) is located below the sand storage tanks (920). The sand storage tank (940) is inside the main body (930) thanks to the cross beam. The sand storage tanks (920), the sand mixing tank (940) and the sand container (950) are mounted as one unit on the main body (930).

The sand mixing device (900) comprises two sets of sand suction pumps (910), sand storage tanks (920) and sand containers (950), the two sets being independently controlled without affecting each other's operation.

I00211 In addition, the device (700) for cleaning and the system (800) for supplying liquid are placed below the print head. The device (700) for cleaning and the system (800) for supplying liquid are folded up and down. A heating device is installed inside the frame to maintain a constant temperature in the printing areas.

Beneficial effects 0022) The present invention has the following beneficial effects: 00231 the sand mold printing ZO device provided by the present invention contains two or more working boxes, enables simultaneous operation of two or more working boxes during the sand distribution and printing operation, and can double the printing efficiency at the same time compared to a ZO sand mold printing machine with a single working box in the same design, thereby effectively reducing sand mold costs and meeting production requirements faster.

Brief description of the drawings

I0024| Fig. 1 is a front view of a three-dimensional design of a multi-box sand mold printing device 30 according to the present invention; 0025) Fig. 2 is a rear view of a three-dimensional construction of a device for 3D printing of sand molds with several boxes, according to the present invention; (0026) Fig. C is a diagram of the internal structure of the device for ZO printing of sand forms with several boxes, according to the present invention;

I0027| Fig. 4 is a structural block diagram of a device for ZO printing of sand forms with several boxes, according to the present invention; 0028) Fig. 5 is a schematic diagram of the system for transporting working boxes according to the present invention;

І0029| Phym. b is a diagram of the internal structure of the roller system for transportation, according to the present invention; 0030) Fig. 7 is a block diagram of the general design of working boxes according to the present invention;

I0OZ1) Fig. 8 is a block diagram of a design for sealing working boxes according to the present invention;

From 00321 Fig. 9 is a block diagram of a mechanism for lifting working boxes according to the present invention; 0033) Fig. 10 is a block diagram of the construction of the mechanism for lifting working boxes, according to the present invention; 00341 Fig. 11 is a second block diagram of the construction of the mechanism for lifting working boxes, according to the present invention; 0035) Fig. 12 is a block diagram of the general design of the sand distributor in the first embodiment of the present invention; 0036) Fig. 13 is a block diagram of part of the structure of the sand distributor in the first embodiment of the present invention; 00371 Fig. 14 is a block diagram of the general design of the sand distributor in the second embodiment according to the present invention; 0038) Fig. 15 is a block diagram of part of the structure of the sand distributor in the second embodiment of the present invention; 0039) Fig. 16 is a block diagram of the design of the movement of the print head according to the present invention; 0040) Fig. 17 is a block diagram of the general layout of the cleaning device according to the present invention; 00411) Fig. 18 is a block diagram of the internal structure of the cleaning device according to the present invention; 00421 Fig. 19 is a block diagram of a fluid delivery system according to the present invention;

I0043| Fig. 20 is a block diagram of the external structural layout of the sand mixing tank according to the present invention;

I0044| Fig. 21 is a block diagram of the external structural layout of the sand mixing tank according to the present invention; 00451 Fig. 22 is a block diagram of the principle of operation of a sand mixing tank according to the present invention; (0046) Fig. 23 is a first block diagram of a structure for controlling the delivery of sand in a sand mixing tank according to the present invention; and

I0047| Fig. 24 is a second block diagram of a structure for controlling the delivery of sand in a sand mixing tank 60, in accordance with the present invention.

00481) 100-frame of the main body, 200-system for transporting working boxes,

З00-working box, 900-sand mixing device, 0О10-secondary stage control tower, 020-control panel, 030-folding door, 040-primary stage control tower, 050-rail protection device, 060-electrical control camera, 070- waste sand recovery tank, 080-electrical servo chamber, 090-gas source chamber, 101-rear view window, 102-side view window, 103-rear support plate, 227-roller lifter, 500-sand distributor, 600-printer head, 700-cleaning device, 800-fluid supply system, 420-motor for raising work boxes, 510-sand spreader control module, 520-sand spreader actuation motor, 530-connector, 620-line motor for driving the print head in X direction, 633- module for driving the print head in Y direction, 631- servo motor for driving the print head in Y direction, 210-roller mounting beam, 220-roller structure, 227-roller elevator, 230-plate for supporting steel grid, 240-steel grid, 250-support rack, 260-connection, 261-engine, 262-engine mounting base, 270-sand container, 280-mechanism for attaching working boxes, 290-mechanism for placing working boxes, 221-mounting base, 222-chain gear wheel, 223-bearing, 224-closing ring, 225-roller, 226-support shaft, 311-left and right upper sealing frames, 312- left and right housings, 313-left and right inner linings,

C314-Left and Right Lower Support Frames, 321-Left and Right Hair Felt Compression Plates, 322-Left and Right Hair Felts, 323-Work Box Base, 324-Bottom Bracket,

C25-Front and Rear Hair Felt Compression Plates, 326-Front and Rear Hair Felts, 331-Front and Rear Upper Sealing Frames, 332-Front and Rear Housings,

C333-front and rear inner lining, 334-front and rear lower support frames, 400-mechanism for lifting working boxes, 410-frame, 411-left bracket, 412-lower bracket, 413-right bracket, 414-engine base, 420 -servo motor, 430-lifting part, 431-fixed bearing, 432-screw lever, 433-nut, 434-connecting block, 435-floating bearing, 436b-support block, 437-adjusting screw jack, 438- lifting plate, 415-guide rail, 416-sliding block, 440-transmission mechanism, 441-motor connecting shaft, 442-drive wheel, 443-compression wheel, 444-belt, 445-drive wheel, 501-sand container, 502- screw rod, 503-plate, 504-spiral drive motor, 505-sand container support base, 506-synchronous belt pulley, 507-support plate, 508-hole for receiving sand, 509-sand level sensor, 541-hole for dispensing sand, 542-oscillating earring, 543-rotating pin-shaft, 544-supporting base of the rotary piece ift-shaft, 545-plate for adjusting the gap, 550-vibration motor, 551- eccentric shaft, 552-bearing, 553-eccentric block, 554-connecting block, 560- container for dispersing sand, 570-plate for scraping sand, 511-rotating shaft support base, 512-rotating shaft, 513-rocking rod, 514-cylinder support base, 515-telescopic cylinder, 516-limiting block, 517-heating pipe, 521-funnel, 522-connecting block .

B5B2-bearing, 553-eccentric block, 611-X-axis auxiliary support frame, 612-X-axis auxiliary guide rail support frame, 613-X-axis auxiliary guide rail limiter, 614-guide rail sliding block, 615-auxiliary connecting base X-axis, 616- guide rail, 617- overlay protective plate of the X-axis auxiliary guide rail, 618- overlay plate of the X-axis auxiliary support frame, 619- auxiliary fixing plate of the axis

X, 621-X-axis main fixing plate, 622-X-axis main support frame, 623-X-axis main support frame cover plate, 624-X-axis main guide rail cover plate, 625-magnetic guide rail, 626-main guide limiter X-Axis Rails 627-X-Direction Linear Motor 628-Axis Main Connecting Base

XM, 631-X-axis motor, 632-motor fixing plate, 633-M-axis module, 634-M-axis movable connection plate, 640-printhead assembly, 720-paper clamping mechanism, 730-printhead cleaning bath . . 721-compression spring for horizontal adjustment of cleaning plate, 736-cleaning tank, 821-first addition point, 822-primary filter, 823-first engine, 824-first storage box, bo 825-second engine, 826-secondary filter , 827-first solenoid valve, 828-first flow control valve, 829-first in iconic element, 831-various collection points for spent liquid, 832-second solenoid valve, 833-third motor, 834-collection box, 835-first filter, 836-fourth motor, 837- one-way valve, 838-regeneration point, 841 -cleaning agent addition point, 842-second filter, 843-third filter, 844- second storage box, 845-fifth motor, 846-third solenoid valve, 847-second flow control valve, 848-cleaning point, 851- second attachment point, 852-fourth filter, 853-valve, 854-third storage box, 855-second actuator, 910- sand suction pump, 920-sand storage tank, 921-sand inlet, 922- sensor masses, 930-Main body, 931-Control chamber, 932-Fluid supply system support base, 923-First control valve, 940-Sand mixing tank, 941-Sand mixing tank inlet, 942-Mixing tank bottom sand, 943-engine, 924- first wind engine, 948-sensor, 950- tank for pi sku, 951-metal guide plate for sand, 952-second control valve, 953-second wind motor, 944-air cylinder, 945-connecting bracket, 946-sealing block, 947-upper part of sand mixing tank and 949-stirring blade.

Embodiments of the Invention 0049) In order to provide a person skilled in the art with a better understanding of the technical solutions of the present invention, the present invention is further described below in detail in combination with specific embodiments.

I0050| The general design of this invention is shown in fig. 1-4. The device for ZO printing of sand forms with several working boxes contains: frame (100) of the main body, systems (200) for transporting working boxes, working boxes (300), mechanisms (400) for lifting working boxes, distributors (500) of sand, printing a head (600), a cleaning device (700), a fluid supply system (800), a sand mixing device (900) and an electrical system, and the main body frame (100) comprises at least three vertical columns.

A main body frame (100) consisting of more than three vertical columns is assembled to form more than two independent work zones. The unit of the mechanism (400) for lifting the working boxes is accordingly installed on the lower part of each working area. The unit of the system (200) for transporting working boxes is placed above each of

From more than two units of independent mechanisms (400) for lifting the working boxes for driving movement of the working boxes (300) along the direction U. The lower plates of the working boxes (300) are movable plates. Working boxes (300) can be brought to lift along the direction 72 by means of mechanisms (400) for raising working boxes. More than three sand spreader control modules (510) are suitably located above each of at least three vertical columns of the frame (100) of the main body. More than three sand distributor control modules (510) are connected by means of at least two connecting means (530). The connecting means are connected to the drive motors (520) for controlling the sand distributors. A suitable number of sand distributors (500) are suitably placed immediately above two or more working boxes (300). The sand distributors (500) are fixed above the side blocks corresponding to at least three sand distributor control modules (510). A corresponding number of sand distributors (500) can be actuated synchronously along the M direction by means of drive motors (520) for controlling the sand distributors. Inside the upper part of the frame (100) of the main body, a linear motor (620) is installed to drive the print head in the X direction. A module (633) to drive the print head in the U direction is installed below the linear motor (620) to drive the print head in the X direction. ) is connected to the Y-direction printhead control module (633). The printhead (600) can operate in the X-direction and the Y-direction by actuating the X-direction printhead control linear motor (620) and the servomotor (633). driving the print head in the direction of U. A device (900) for mixing sand is installed outside the upper part of the frame (100) of the main body to feed sand into the distributor (500) of sand. The cleaning device (700) and the liquid supply system (800) are placed below one end of the print head (600) along the direction U. The cleaning device (700) and the liquid supply system (800) fold up and down. A heating device is installed inside the frame to maintain a constant temperature in the printing areas. The device for heating can be a lamp tube, an air conditioner, microwaves, etc. in each wavelength range.

I0O51| In another embodiment of the present invention, there is still another form of combination for the operating sequence of the plurality of sand distributors (500) and the print head (600), that is, an independent sand distributor control drive motor (520) is installed on each sand distributor (500), while each sand distributor (500) can separately distribute sand, and the print head (600) separately prints on each work area in which the sand distribution is completed properly. 0052) The general principle of operation of the system is as follows: sand, liquid materials, etc., as for ZO printing, are mixed by the sand mixing device (900) and then quantitatively added to the appropriate number of sand distributors (500). When the sand spreader control drive motors (520) rotate, the three sand spreader control modules (510) are driven for synchronous operation by more than two coupling means (530) so as to actuate a corresponding number of sand spreaders (500) for synchronous operation along direction U. The sand distributors (500) return to their initial positions after completing the sand distribution operation over independent two or more working boxes (300), respectively. At this time, after the printing head (600) has performed a forward and backward full coverage printing operation on the surface of the sand above the two or more working boxes (300), on which the distribution of the sand is completed due to the actuation of the linear control motor (620) the print head in the X direction and the servo motor (631) driving the print head in the Y direction, the print head (600) is rotated. At this time, the mechanisms (400) for raising the working boxes actuate the movable lower plates of the working boxes (300) for lowering (and the lowering distance is from 0.1 mm to 1 mm, preferably from 0.2 to 5 mm).

The above sand distribution and printing processes are repeated until the overall printing operation is completed. In the above sand distribution and printing processes, the cleaning device (700) carries out regular cleaning, as well as protection against blocking of the print head (600) during non-working hours; and the liquid supply system (800) supplies liquid materials to the sand mixing device (900) and the printhead (600). 0053) Work boxes are issued by the system (200) to transport work boxes after printing is complete. The external roller lifter (227) quickly replaces empty boxes with full boxes, so as to increase the speed of changing boxes and reduce waiting time. (0054) In another version of the implementation of the present invention, the system (200) for transporting working boxes has the following structures, as shown in fig. 5-6 and supported by three roller mounting beams (210). Roller mounting beams (210) are supported by support posts (250). Containers (270) are formed in roller mounting beams (210) for

From receiving sand, intended for receiving sand seeping from working boxes (300).

A steel grid (240) is mounted on plates (230) to support the steel plate. All the above connections are made using bolts. Mounting bases (221) are welded to roller mounting beams (210). Mounting bases are connected to supporting shafts (226).

Rollers (225) and wheels (222) of the chain transmission are connected by means of bolts and fixedly installed on support shafts (226) by means of bearings (223). Finally, the bearings (223) are fixed with the help of closing springs (224). After assembling the motors (261) with the motor mounting bases (262), one side of each motor is fixedly mounted on one roller mounting beam (210) and the other side is connected to another roller mounting beam (210) by connecting means ( 260). On the frame (100) of the main body, a mechanism (290) for placing the working boxes is installed, which is designed to adjust the working positions of the working boxes (30) in the device for ZO printing of sand forms.

II0055| The principle of operation of the system (200) for transporting work boxes is as follows: when the work boxes (300) are to be inserted into the device for ZO printing of sand forms or extracted from it, the connecting means (260) is driven to rotate by the motors (261), so that the roller structures (220) on both sides of the working boxes (300) operate synchronously to ensure that the working boxes (300) do not tilt forward or backward during operation. The force transmitted to the connecting means (260) by the motors (261) is transmitted to the wheels (222) of the chain transmission by means of chains. Finally, the rollers (225) rotate to set the working boxes (300) in motion. After the work boxes (300) have moved to specific positions of the 3D sand mold printing device, the work box attachment mechanisms (280) attach the work boxes (300) in the Y direction so that the side surfaces of the work boxes (300) are in close contacts with mechanisms (290) for placing working boxes. Finally, the work boxes (300) are fully placed front, back, left and right. When the device for ZO printing sand forms is operating, some of the sand in the work boxes (300) may seep through the side surfaces of the work boxes (300). The seeped sand is received by the sand receiving containers (270) and finally collected by the dust collector. After the ZO sand mold printing device has finished printing, the roller structures (220) actuate the working boxes for extraction. The work boxes (300) are transported to the sand removal position by lifting the outer roller bo rail with the roller lifter (227), thereby completely completing the operation. In the process, the left roller structure (220) and the right roller structure (220) can work simultaneously, and can also work separately, thereby satisfying a plurality of work boxes to be fed into and withdrawn from the ZO sand mold printing device at different times time

I0056| In another version of the implementation of this invention, the working boxes (300) have the following designs, as shown in fig. 7-8. The inner linings (including the left and right inner linings (313) and the front and rear inner linings (333)) are made of waterproof material and carry the continuous friction force of the inner sand and hair felt. The housings (including the left and right housings (312), as well as the front and rear housings (332)) are made of high-rigidity materials, form the overall frames of the working boxes, provide the overall strength and rigidity of the working boxes, and also prevent deformation.

The housings are combined with the working boxes with the help of bolts. Seal frames (including left and right upper seal frames (311) and front and rear upper seal frames (331)) are installed around the top and are flush with the sand distributors to ensure that no seepage occurs during sand distribution sand around the working boxes. Support frames (including left and right lower support frames (314), as well as front and rear lower support frames (334) and lower brackets (324)) are installed around the bottom and on the bottom surface, to support the surrounding structures and limit, when bases (323) move to the lowest positions.

Hair felts (including left and right hair felts (322) and front and rear hair felts (326)) are mounted on the upper parts around the bases (323) of the working boxes and are bolted down using hair felt pressure plates (in (including the left and right hair felt pressure plates (321) and the front and rear hair felt pressure plates (325)) so that the hair felts are tightly inserted into the surrounding inner linings to ensure that when moving from the lower parts working boxes do not seep sand.

І0057| The principle of operation of the work boxes (300) is as follows: the mechanisms (400) for lifting the work boxes push the bases (323) of the work boxes to the upper end, the distributors (500) of sand start to work. The upper sealing frames ensure that the sand acts only inside the working boxes during sand distribution without sand seepage. After driving the sand distributors (500) to distribute the sand layer and the printing head completing the relevant printing operation, the bases (323) of the working boxes are lowered to a fixed height by the lifting machine (400). The above sand distribution and printing processes are repeated until the bases (323) of the work boxes are lowered to their lowest position, thereby completing the overall sand distribution and printing operation. 0058) In another version of the implementation of this invention, the mechanisms (400) for lifting working boxes have the following designs, as shown in fig. 9-11, and include frames (410), servo motors (420), lifting parts (430) and transmission mechanisms (440). Servomotors (420), lifting parts (430) and transmission mechanisms (440) are mounted on frames (410). Frames (410) consist of left brackets (411), lower brackets (412), right brackets (413) and bases (414) of the engines. Servo motors (420) actuate the drive wheels (442) to drive the connecting shafts (441) of the motor. Drive wheels (442) actuate driven wheels (445) for joint movement by means of belts (444). Belts (444) are tensioned by compression wheels (443) during rotation. The driven wheels (445) are connected to the screw levers (432) by means of welding, and also drive the screw levers (432) into rotation. The upper and lower ends of the screw arms (432) are fixed with floating bearings (435) and fixed bearings (431). 0059) The principle of operation of the mechanisms (400) for lifting the working boxes is as follows: when the device for ZO printing of sand forms is controlled, the working boxes (300) reach specific positions, and the lifting parts (430) of the elevators (400) are placed at the highest point in the working range. As printing progresses, servo motors (420) in the lifters (400) actuate drive wheels (442) to drive the connecting shafts (441) of the motor. Drive wheels (442) actuate driven wheels (445) for joint movement by means of belts (444). Belts (444) are tensioned by compression wheels (443) during rotation. The driven wheels (445) are connected to the screw levers (432) by means of welding, and also drive the screw levers (442) into rotation. The upper and lower ends of the screw arms (442) are fixed with floating bearings (435) and fixed bearings (431). As the screw levers (432) rotate, the nuts (433) mounted on the screw levers (432) move down along the threads. Lifting plates (438) are connected to bo nuts (433) by means of connecting blocks (434). As the nuts (433) move down,

lifting plates (438) are driven down by connecting blocks (434).

The sliding blocks (416) are mounted on the lifting plates (438) The sliding blocks (416) slide on the guide rails (415), and the guide rails can be placed on brackets, and can also be vertically placed separately, so as to allow the movement of the lifting plates (438 ) up and down without deviation. The working boxes (300) are supported by four support blocks (436) throughout the movement process. The positions of the adjusting screw jacks (437) are controlled to maintain the working boxes (300) in a horizontal position. After the entire printing process is completed, the lifters (400) are moved up to return to their original starting positions for re-operation. 0060) In another version of the implementation of this invention, the sand distributors (500) have the following designs, as shown in fig. 12-13. The sand distributors (500) are a unidirectional design for sand distribution. In particular, as shown in the figures, in order to meet the requirements of the distribution of sand with large clearances (more than 2 m), each container (501) for sand is formed by joining two rectangular pipes. Spaces are left in the middle of the square pipes for storing sand. Positions above containers (501) for sand are connected to overlay plates (503) using hinges. The cover plates (503) can rotate around the hinges. At one end of each overlay plate (503) a hole (508) is formed for receiving sand, and at the other end of each overlay plate (503) a spiral drive motor (504) is installed. The screw rods (502) are located directly below the overlay plates (503). The screw rods (502) are connected to the helical drive motors (504) by means of synchronous belt pulleys (506) and synchronous belts. Containers (560) for dispersing sand are formed in the middle of containers (501) for sand. The holes (541) for dispensing sand are located below the containers (560) for dispersing sand. The flat plates adjacent to the backs of the sand discharge holes (541) and forming a certain angle with the horizontal plane are the sand scraping plates (570), and the angle is between 0 and 5 degrees.

I0061)| The eccentric shafts (551) are on one side below the containers (501) for sand. A plurality of fixed supports are placed in the middle. A plurality of eccentric blocks (553) are mounted on eccentric shafts (551) with bearings (552). Lower ends

Of the eccentric blocks (553) are also connected to the connecting blocks (554) by means of pins. Plates (570) for scraping sand are installed on the back surfaces of the connecting blocks (554). A vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed below each container (501) for sand. The connecting blocks (554) and sand scraping plates (570) fixed above the connecting blocks (554) are connected to the support bases (544) of the rotary pin shaft by means of oscillating rings (542). and connecting pin shafts (543). The support bases (544) of the rotary pin-shaft are installed below the containers (501) for sand.

I0052| The principle of operation of the sand dispensers (500) in the first embodiment of the solution is as follows: sand is added to the container (501) for sand through the holes (508) for receiving sand. When the sand level sensor (509) indicates that a sand-full signal is detected, sand addition is stopped. As the sand is added, the screw rods (502) begin to rotate uniformly by activating the spiral drive motors (504) and distributing the sand evenly throughout the sand containers (501). At the start of the sand distribution operation, the sand inside the sand containers (501) is filtered by the sand dispersing containers (560) and then evenly poured out from the sand discharge holes (541). The sand scraping plates (570) work synchronously to evenly scrape the spilled sand. In the sand distribution process, by actuating the vibration motors (550), the eccentric shafts (551) rotate at high speed supported by the bearings (552) in order to actuate the connecting blocks (554) to reciprocate up and down .

The connecting units (554) also drive the scraping sand plates (570) to vibrate at a high frequency to ram the scraped sand at the same time, thereby achieving the effects of improving the density and strength of the sand forms. By adjusting the frequencies and speeds of rotation of the vibration motors (550), different densities and strengths of sand forms can be obtained. 0063) In another version of the implementation of this invention, the sand distributors (500) have the following designs, as shown in fig. 14-15. The sand distributor (500) is a bidirectional construction for sand distribution. In particular, as shown in the figures, in order to meet the requirements of the distribution of sand with large clearances (more than 2 m), each container (501) for sand is formed by joining two rectangular pipes. In the middle of the square pipes there are spaces left for storing sand. Positions above containers (501) for sand are connected to overlay plates (503) using hinges. The cover plates (503) can rotate around the hinges. At one end of each overlay plate (503) a hole (508) is formed for receiving sand, and at the other end of each overlay plate (503) a spiral drive motor (504) is installed. The screw rods (502) are located directly below the overlay plates (503). The screw rods (502) are connected to the spiral drive motors (504) by means of synchronous belt pulleys (506) and synchronous belts. The sand containers (501) and their mounting parts in operation are mounted integrally in the base (511) to support the rotary shaft by means of rotary shafts (512) on both sides.

The base (511) for supporting the rotary shaft is fixed. Swing rods (513) are mounted above the base to support the rotating shaft. The bases (514) for supporting the cylinders are on both sides of the containers (501) for sand. The bases (514) for supporting the cylinders are connected to the telescopic cylinders (515) by means of pin shafts.

The levers of the telescopic cylinders (515) are connected to the swinging rods (513) by means of pins. The sand containers (501) and their mounting parts in action can be brought to co-rotate around the base (511) to support the rotating shaft by the telescoping action of the telescoping cylinders (515). Funnels (521) are installed in the middle of containers (501) for sand. The holes (541) for dispensing sand are located below the funnels (521). The flat plates adjacent to both sides of the sand discharge holes (541) and forming a certain angle with the horizontal plane are the sand scraping plates (570). The angle is from -5 to 5 degrees and can be adjusted by telescopic cylinders (515) and limit blocks (516). The angle can be adjusted by rotary motors, rotary cylinders, racks, worm gears and other methods in addition to the adjustment by telescopic cylinders, and can also be manually adjusted.

I0064| The eccentric shafts (551) are on one side below the containers (501) for sand. A plurality of fixed supports are placed in the middle. A plurality of eccentric blocks (553) are 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 below the containers (501) for sand. Grooves (524) of the elastic gas line and plates (523) for

Sand scrapers are installed on the lower parts of the connecting blocks (554). A vibration motor (550) is connected to one end of each eccentric shaft (551) and fixed below each container (501) for sand. The heating pipes (517) are located below the containers (501) for sand and are placed on the opposite sides of the eccentric shafts (551). 0065) The principle of operation of the sand dispensers (500) in the second embodiment of the solution is as follows: sand is added to the container (501) for sand through the holes (508) for receiving sand. When the sand level sensor (509) indicates that a sand-full signal is detected, sand addition is stopped. As the sand is added, the screw rods (502) begin to rotate uniformly by activating the spiral drive motors (504) and distributing the sand evenly throughout the sand containers (501). At the start of the sand distribution operation, the sand inside the sand containers (501) is directed by the funnels (521) and then evenly poured out of the sand dispensing holes (541). The sand scraping plates (523) work synchronously to evenly scrape the spilled sand. In the sand distribution process, by actuating the vibration motors (550), the eccentric shafts (551) rotate at high speed supported by the bearings (552) in order to actuate the connecting blocks (553) for reciprocating up and down movement . The eccentric blocks (553) also cause the hoppers (521) to vibrate at a high frequency so that sand can be successfully poured out of the holes (541) to discharge the sand below the hoppers (521). The sizes of the gaps of the holes (541) for dispensing sand can be adjusted by elastic gas lines (525). The gaps (mostly, the gaps are from 0 to 2 mm) between the elastic gas pipes (525) are regulated by controlling the air pressure, thereby achieving the effect of regulating the amount of sand dispensed. The second version of the solution has the advantage of providing bidirectional distribution of sand. When the sand is distributed, the angles of inclination (-5 to 5 degrees) formed by the sand scraping plates (523) and horizontal planes are obtained by controlling the telescopic stage of the telescopic cylinders (515) and the positions of the limit blocks (516), thereby eliminating the work idling of sand distributors (500) and increasing the working efficiency of the device for ZO printing of sand forms. The heating pipes (517) placed below the sand containers (501) can heat the printing materials according to the printing requirements. Due to the adjustment of the heating temperature, different strengths of sand forms and values of hardening time can be obtained. The arrangement and operating principles of the heating tubes (517) are also applicable to any case in which printing materials and sand molds are to be heated in a sand mold ZO printing device. (0066) In another embodiment of the present invention, the printhead assembly (640) has the construction as shown in FIG. 16. The movement of the printhead assembly (640) is generally a coordination of the X-axis movement and the Y-axis movement to complete the ZO printing operation. Magnetic guide rails (625) are attached to the X-axis main support frame (622). Two guide rails (616) are mounted on the magnetic guide rails. The linear motors (627) of the X-axis are connected to the sliding blocks (614) of the guide rail and the main connecting bases (628) of the X-axis with the help of bolts. The M-axis modules (633) are actuated for movement by linear motors, thereby actuating the entire printhead assembly (640) for X-axis movement. The periphery of the guide rails are mechanically sealed by the X-axis main frame support plates (623), X-Axis Main Guide Rail Overlay Protection Plates (624) and X-Axis Main Guide Rail Limiters (626) to prevent dust and other dirt from entering the guide rails and motors, affecting operating effects. The ZO model of the printer is too large and one support in the X direction cannot meet the strength of the printer, so the X-axis auxiliary support frames (611) are made on both sides, and the X-axis guide rail auxiliary support frame (612) is installed on the printer 30 to fix the guides rails (616). The guide rail slide units (614) on the guide rails are combined with the X-axis auxiliary coupling bases (615) by means of bolts to assist in the movement of the print head assembly (640) in the X direction.

The peripheries of the guide rails are sealed by X-axis guide rail auxiliary stops (613), guide rail sliding blocks (614), and X-axis auxiliary support frame shims (618) to ensure a clean operating condition for the guide rails. The X-axis main support frame (622) and the X-axis sub-support frames (611) form a path in which the printhead assembly (640) operates to provide strength to the X-axis of the printhead. The support frame is connected to the structure of the main body of the ZO printer by means of the auxiliary fixing plate (619) of the X-axis and the main fixing plate (621) of the X-axis

X to ensure that the X-axis of the printer assembly (640) is within the full travel range

ZO of the printer. Motors (631) of the M axis are connected to the modules (633) of the M axis by means of locking

From the plates (632) of the axis U. The power of the engine drives the movable connecting plate (634) of the axis

Y to move in the Y direction so as to ensure the movement of the printhead assembly (640) in the Y direction.

I0067| The working principle of the printhead (600) is as follows: the printhead assembly (640) is driven by linear motors (620) in the X-axis main support blocks to provide X-axis movement. Due to the problem of long X-axis travel, a magnetic array ruler is used to ensure accurate positioning of the printhead assembly (640) in the X direction. X-axis auxiliary support blocks (610) are used on both sides to complete the auxiliary support of the entire frame, so as to ensure the strength of the printhead assembly and the printer body. The printhead assembly (640) moves along the X-axis using the Y-axis blocks. The magnetic grid ruler design in the system is used to achieve precise positioning in the Y direction. The X-axis is coordinated with the Y-axis so that the printhead assembly (640) moves accordingly according to a predetermined plan. (0068) In another embodiment of the present invention, the device (700) for cleaning has the following design as shown in fig. 17-18 and is installed in a specific position of the sand mold printing device 30 using a support plate (714). The cleaning plate (712) is supported at the front and rear by two support beams (713). The plate (712) for cleaning is connected to the supports of two support beams (713) with the help of bolts. The smoothness and height of the cleaning plate (712) are determined by adjusting the compression springs (721) for horizontal adjustment of the cleaning plate so as to ensure the flatness and distance between the plane of the print head and the cleaning plate (712) in the device for

About the printing of sand forms. The sponge (741) in the sponge mechanism (740) is located horizontally on the support plate (742) for the sponge. The sponge support plate (742) is supported by a compression spring (743). The height of the sponge (741) can be adjusted using the telescopic action of the compression spring (743). A bath (730) for cleaning the print head is installed below the cleaning plate (712). A rectangular sealing container (735) is formed between the bath (730) for cleaning the print head and the plate (712) for cleaning. Chrome shafts (732) are placed in front and behind the bath (730) for cleaning the print head. The cleaning strips (733) and the cleaning strip mounting plate (734) are mounted on chrome shafts (732), and the two cleaning strips (733) are bolted to the cleaning strip plate (734). Finally, the plate (734) for the cleaning strip is mounted on the chrome shafts (732) with the help of set screws. The liquid material sensor (731) is used to detect whether the cleaning liquid is placed in place and to ensure that a portion of the cleaning strips (733) is wetted in the cleaning liquid. The paper clamping mechanisms (720) are also supported and mounted on support beams (713) by compression springs (721) for horizontal adjustment of the cleaning plate. The height of the paper support plates (723) can be adjusted using compression springs (721) to horizontally adjust the cleaning plate to ensure that the paper support plates (723) and the cleaning plate (712) meet the same flatness requirements. 0069) The working principle of the cleaning device (700) is as follows: when the print head in the ZO sand mold printing device needs to be cleaned, the cleaning device is moved above the container (730) to clean the print head in the X direction; cylinders (750) rotate left to right to drive chrome shafts (730) into rotation; when a certain angle is formed between the strips (733) for cleaning on the chrome shafts (730) and the print head, the print head is cleaned; the waste liquid cleaned from the print head is collected in the waste liquid collection container (715) and finally discharged together. When it is necessary to adjust the accuracy of the print head of the ZO sand mold printing device, the print head is moved above the mechanism (720) for clamping the paper, and the accuracy of the print head is adjusted by straightness, where the powder in the form of a "straight line" is printed onto the paper by the print head. When the ZO sand mold printing device needs to be shut down for maintenance, the print head can be moved above the sponge mechanism (740); and the liquid material in the sponge (741) can keep the bottom surface of the print head moist for a long time to prevent the print head from blocking.

I0070) In another version of the implementation of this invention, the system (800) for supplying liquid has a design as shown in fig. 19, and includes a mounting bracket 810 (not shown), a first liquid supply system 820, a spent liquid regeneration system 830, a cleaning supply system 840, a second liquid supply system 850, and other auxiliary devices 860. The supply system 820 of the first liquid material includes a first addition point 821, a primary filter 822, a first motor 823, a first box 824 for

From storage, a second motor 825, a secondary filter 826, a first solenoid valve 827, a first flow control valve 828, and a first actuator 829. A waste fluid regeneration system 830 includes various waste fluid collection points 831, a second solenoid valve 832, a third motor 833, collection box 834, first filter 835, fourth motor 836, one-way valve 837 and regeneration point 838. The cleaning supply system 840 includes a cleaning agent addition point 841 , a second filter 842 , a third filter 843 , a second storage box 844 , a fifth motor 845 , a third solenoid valve 846 , a second flow control valve 847 , and a cleaning point 848 . The system for supplying the second liquid material includes a second addition point 851, a fourth filter 852, a valve 853, a third storage box 854, and a second actuator 855. Other auxiliary devices include a detection position switch 861 (not shown), a first pressure detection switch 862 ( not shown), a second pressure detection switch 863 (not shown), a third pressure detection switch 864 (not shown), and a welding chamber 865 (not shown).

I0071| The principle of operation of the system (800) for supplying liquid is as follows: the points of addition and points of regeneration are concentrated in one place and their number is not limited.

Accordingly, the storage boxes have a single box body and a plurality of barrier layers, and their number is not limited. All liquid storage boxes are placed in one box body. All motors and filters are mounted on storage boxes using mounting plates.

All components are connected by pipes and joints to ensure a smooth interior of the same cycle.

I0072| Feed systems are separate loops and are added to storage bins from external addition points in a combined way. The system for regeneration of spent liquid is a special system for regeneration of spent liquid. All spent liquid, regardless of whether it is singular or plural, is concentrated in boxes for storing spent liquid in a combined way and is issued in a combined way. More preferably, one pressure detection switch is placed on the bottom of one storage box to detect the amount of liquid in the storage box at any time. More preferably, the upper parts of the storage boxes are connected to the waste liquid boxes by means of pipes to ensure that all liquid enters the waste liquid boxes after the addition of excess liquid material. More preferably, the position detection switches 861 are located on the upper parts of the waste fluid containers in order to detect the height of the fluid in the waste fluid box at any time.

I0073) In another version of the implementation of this invention, the device (900) for mixing sand has the following design, as shown in fig. 20-24, and consists of pumps (910) for suction of sand, tanks (920) for storing sand, main body (930), tank (940) for mixing sand, containers (950) for sand, etc. Sand suction pumps (910) are installed above the sand storage tanks (920) and provide complete sealing. The sand mixing tank (940) is located below the sand storage tanks (920). The sand storage tank (940) is inside the main body (930) thanks to the cross beam. The sand storage tanks (920), the sand mixing tank (940) and the sand container (950) are integrally mounted on the main body (930). Camera (931) control, bracket (932) box for liquid material, etc. respectively installed on both sides of the main body (930). The weight sensor, motor and control valve are controlled by the control cam (931).

I0074| The sand mixing device (900) comprises two sets of sand suction pumps (910), sand storage tanks (920) and sand containers (950), the two sets being independently controlled without affecting each other's operation, thereby not only increasing the capacity of the stored sand, but also using the synchronous operation of a single sand distributor and a plurality of sand distributors, and also increasing the efficiency of the device. Sand storage tanks (920), sand mixing tank (940) and sand containers (950) are mounted on the main body (930). The main body (930) additionally contains a control chamber (931) and a bracket (932) of a box for liquid material; while the corresponding sensors, motors and control valves are controlled by the control cam (931). 0075) The working principle of the sand mixing tank (920) is as follows: when the ZO printing sand mold device starts working, the sand suction pumps (910) are ventilated to work; sand enters the sand storage tanks (920) through the sand inlets (921) in the sand storage tanks (920) under the action of sand suction pumps (910); mass sensors (922) installed around the lower parts of the sand storage tanks (920) measure and output the change in weight; when the weight of the sand in the sand storage tanks (920) reaches a set value, the mass sensors (922) send a signal and the pumps (910) to

Sand suction stops working. When the sand in the sand storage tanks (920) reaches a set value, the first control valve (923) automatically opens; the vibration motor (924) starts working; sand enters the sand mixing tank (940) through the sand mixing tank inlet (941); and meanwhile, the liquid material enters the sand mixing tank (940) through a pipe at a specific ratio (from C 95 to 20 95).

A motor (943) on the bottom (942) of the sand mixing tank drives the mixing blades (949) to rotate at high speed. After the sand and liquid material are evenly mixed, the air cylinder (944) actuates the connecting bracket (945) to begin upward movement at this time. The sealing block (946) opens. Sand mixed with liquid material enters the sand containers (950). The second control valve (952) opens. The second vibration motor (953) starts to work. The sand enters the sand distributors (500) along the metal plate (951) to direct the sand. The sensor (948) detects sand in the sand dispensers (500). After reaching a specific height, the second control valve closes; and the second vibration motor (953) stops working. The above steps are repeated to provide continuous automatic sand suction, sand mixing and sand adding functions. 0076) The sand mixing tank (940) has the characteristics that the sand mixing tank (940) is structurally divided into an upper part (947) of the sand mixing tank and a lower part (942) of the sand mixing tank, which are connected to each other by the method of docking from above and below. The part of the bottom part (942) of the sand mixing tank, which is in frequent contact with the sand, is made of stainless steel and other water-resistant as well as corrosion-resistant materials. The inner space of the bottom of the sand mixing tank is covered with a waterproof material to improve water resistance and extend the shelf life. Meanwhile, when the tank body wears out, only the bottom part (942) of the sand mixing tank needs to be replaced, thus simplifying replacement and saving costs. The hole for dispensing sand is sealed with an arc-shaped ring sealing block (946); and meanwhile, sealing tapes are additionally placed on the sealing blocks to help prevent fine sand from escaping from the gaps. Stirring blades (949) are formed by combining an annular arc with a bent flat plate, so as to increase the mixing area, increase mixing efficiency, and more uniform mixing. because Industrial suitability

I0077| The device for ZO printing of sand forms with several working boxes, which is provided in this invention, is described in detail above.

The principles and implementation options of this invention are described by applying the implementation options in this invention.

The illustration of the above implementation options should be used only to help in understanding the method and its main idea in this application.

Meanwhile, one skilled in the art may make some changes in the specific embodiment and scope of the application in accordance with the intent of the application.

In conclusion, the contents of this description should not be construed as limiting this application.

Claims (10)

FORMULA OF THE INVENTION 1. A device for ZO-printing of sand forms with several working boxes, containing: frame (100) of the main body, systems (200) for transporting working boxes, working boxes (300), mechanisms (400) for lifting working boxes, distributors ( 500) sand, printing head (600), device (700) for cleaning, system (800) for supplying liquid, device (900) for mixing sand and electrical system; and the frame (100) of the main body contains at least three vertical columns; the frame of the main body is assembled to form two or more independent working zones; and the assembly of the mechanism (400) for lifting the working boxes is accordingly installed on the lower part of each working area; the unit of the system (200) for transporting the working boxes is placed above each mechanism (400) for lifting the working boxes for the driving movement of the working boxes (300) along the direction of the Y axis; the working boxes (300) contain lower plates which are movable plates, and the lower plates drive the working boxes (300) to rise along the direction of axis 2 by means of mechanisms (400) for lifting the working boxes; sand spreader control modules (510) are suitably located above each of at least three vertical columns of the main body frame (100); at least three sand distributor control modules (510) are connected by means of at least two connecting means (530); connecting means are connected to drive motors (520) for controlling sand distributors; at least two sand distributors (500) are fixed above the sliding blocks corresponding to at least three sand distributor control modules (510); the corresponding number of sand distributors (500) are actuated synchronously along the direction of the M axis by means of drive motors (520) for controlling the sand distributors; and a corresponding number of working boxes (300) is suitably located below each of the at least two sand distributors (500); inside the upper part of the frame (100) of the main body, a linear motor (620) is installed for controlling the print head in the X direction; the module (633) for controlling the print head in the M direction is installed below the linear motor (620) for controlling the print head in the X direction; the print head (600) is connected to the module (633) for controlling the print head in the Y direction; and the print head (600) operates in the X-axis direction and in the Y-axis direction by driving the linear motor (620) to drive the print head in the X direction and the servo motor (631) to drive the print head in the Y direction; and a sand mixing device (900) is installed outside the upper part of the frame (100) of the main body to supply sand to the sand distributor (500). 2. The device according to claim 1, in which the systems (200) for transporting working boxes include at least three roller mounting beams (210); roller mounting beams (210) are supported by support posts (250); the mounting base (221) is fixed on one side of each roller mounting beam (210); mounting bases are connected to support shafts (226); the rollers (225) are fixedly connected to the wheels (222) of the chain transmission and fixedly installed on the support shafts (226) with the help of bearings (223); finally, the bearings (223) are fixed with the help of closing springs (224); containers (270) for receiving sand are installed between the roller mounting beams (210), which are designed to receive sand seeping from the working boxes (300); after assembling the motors (261) with the motor mounting bases (262), one side of each motor (261) is fixedly mounted on one roller mounting beam (210), and the other side is connected to another roller mounting beam (210) by means of connecting means (260); on the frame (100) of the main body, a mechanism (290) for placing working boxes is installed, which is designed to adjust the working positions of working boxes (30) in the device for ZO-printing of sand molds. C. The device according to claim 1, in which the working boxes (300) contain internal linings, housings, sealing frames, support frames and hair felts; internal linings are made of waterproof materials; housings are made of rigid materials; sealing frames are installed around the top and are flush with the sand distributors to ensure that no sand seepage occurs around the working boxes during sand distribution; support frames are installed around the lower part and on the lower surface to support the surrounding structures and limit when the bases (323) are moved to the lowest parts; and piles are mounted on top around the bases (323) of the work boxes and bolted using pile pressure plates so that the piles are tightly inserted into the surrounding interior linings to ensure that during movement from the bottoms of the work boxes sand seepage was taking place. 4. The device according to claim 1, in which the mechanisms (400) for lifting working boxes include frames (410), servomotors (420), lifting parts (430) and transmission mechanisms (440); servomotors (420), lifting parts (430) and transmission mechanisms (440) are mounted on frames (410); frames (410) consist of left brackets (411), lower brackets (412), right brackets (413) and bases (414) of engines; servomotors (420) actuate drive wheels (442) to drive connecting shafts (441) of the engine; the driving wheels (442) actuate the driven wheels (445) for joint movement with the help of belts (444); belts (444) are tensioned by compression wheels (443) during rotation; the driven wheels (445) are connected to the screw levers (432) by means of welding, and also drive the screw levers (432) into rotation; the upper ends and lower ends of the screw levers (432) are fixed using floating bearings (435) and fixed bearings (431); nuts (433) are installed on screw levers (432); together with the rotation of the screw levers, the nuts (433) move up and down along the threads; lifting plates (438) are connected to nuts (433) using connecting blocks (434); sliding blocks (416) are mounted on lifting plates (438); sliding blocks (416) slide along vertical guide rails (415); support blocks and adjusting screw jacks are placed on the upper ends of the lifting plates (438) to support the working boxes (300) during the entire movement process; and the position of the adjusting screw jacks (437) are controlled to maintain the working boxes (300) in a horizontal position. 5. The device according to claim 1, in which the sand dispensers (500) contain sand containers (501) for storing sand; the position above the containers (501) for sand are connected to the ZO overlay plates (503); at one end of each overlay plate (503) a hole (508) is formed for receiving sand, and at the other end of each overlay plate a spiral drive motor (504) is installed; screw rods (502) are located directly below the overlay plates (503); helical rods (502) are connected to spiral drive motors (504) by means of synchronous belt pulleys (506) and synchronous belts; containers (560) for dispersing sand are formed in the middle of containers (501) for sand; sand discharge holes (541) and sand scraping plates adjacent to the backs of the sand discharge holes (541) and forming an angle with a horizontal plane, installed below the sand dispersion containers (560); eccentric shafts (551) are on one side below containers (501) for sand; a set of eccentric blocks (553) is installed on eccentric shafts (551) with the help of bearings (552); the lower ends of the eccentric blocks (553) are connected to the connecting blocks (554); plates (570) for scraping sand are installed on the back surfaces of the connecting blocks (554); a vibration motor (550) connected to one end of each eccentric shaft (551) and fixed below each container (501) for sand; connecting blocks (554) and sand scraping plates (570) fixed above the connecting blocks (554) are connected to the support bases (544) of the rotary pin shaft by means of oscillating rings (542), and connecting pin shafts (543); the support bases (544) of the rotary pin-shaft are installed below the containers (501) for sand. 6. The device according to claim 1, in which the sand distributors (500) contain sand containers (501) for storing sand; positions above containers (501) for sand are connected to overlay plates (503); at one end of each overlay plate (503) a hole (508) is formed for receiving sand, and at the other end of each overlay plate a spiral drive motor (504) is installed; screw rods (502) are located directly below the overlay plates (503); helical rods (502) are connected to spiral drive motors (504) by means of synchronous belt pulleys (506) and synchronous belts; containers (501) for sand and their mounting parts, which are in action, are installed as one unit in the base (511) to support the rotating shaft by means of rotating shafts (512) on both sides; the base (511) for supporting the rotary shaft is fixed; swinging rods (513) installed above the base to support the rotating shaft; bases (514) for supporting cylinders are located on both sides of containers (501) for sand; the bases (514) for supporting the cylinders are connected to the telescopic cylinders (515) by means of pin shafts; the levers of the telescopic cylinders (515) are connected to the rods (513), swinging, with the help of pins; the containers (501) for sand and their mounting parts, which are in action, are brought to co-rotate around the base (511) to support the rotating shaft by means of the telescopic movement of the telescopic cylinders (515); watering cans (521) are installed in the middle of containers (501) for sand; sand discharge holes (541) and sand scraping plates (570) adjacent to both sides of the sand discharge holes (541) and forming an angle with the horizontal plane, installed below the hoppers (521); eccentric shafts (551) are on one side below containers (501) for sand; a set of eccentric blocks (553) is installed on eccentric shafts (551) with the help of bearings (552); the other ends of the eccentric blocks (553) are connected to the funnels (521); connecting blocks (554) are located below containers (501) for sand; grooves (524) of the elastic gas pipeline and plates (570) for scraping sand are installed on the lower parts of the connecting blocks (554); a vibration motor (550) connected to one end of each eccentric shaft (551) and fixed below each container (501) for sand; the heating pipes (517) are below the containers (501) for sand and are placed on the opposite sides of the eccentric shafts (551). 7. The device according to claim 1, in which magnetic guide rails (625) are attached to the main support frame (622) of the X axis; guide rails are mounted on magnetic guide rails; linear motors (620) of the X axis are connected to the sliding blocks (614) of the guide rail and the main connecting bases (628) of the X-axis on the guide rails; the Y-axis modules (633) are actuated for movement by linear motors, thereby actuating the entire printhead assembly (640) for X-axis movement; the periphery of the guide rails is mechanically sealed by overlay plates (623) of the main support frame of the X-axis, overlay protective plates (624) of the main guide rail of the X-axis and limiters (626) of the main guide rail of the X-axis; auxiliary support frames (611) of the X axis are made on both sides of the main support frame of the X axis; the auxiliary support frame (612) of the guide rail of the X axis is installed on the main support frame of the X axis to fix the guide rails (616); guide rail sliding blocks (614) on the guide rails are combined with X-axis auxiliary connecting bases (615) by means of bolts to assist in driving the print head assembly (640) in the X direction; the peripheries of the guide rails Zo are sealed with auxiliary limiters (613) of the guide rails of the X axis, sliding blocks (614) of the guide rails and overlay plates (618) of the auxiliary support frame of the X axis; the support frame is connected to the structure of the main body of the ZO printer by means of the auxiliary X-axis locking plate (619) and the main X-axis locking plate (621) to ensure that the X-axis of the printer assembly (640) is within a travel range of only 30- printer; motors (631) of the M axis are connected to the modules (633) of the M axis by means of fixing plates (632) of the Y axis; and the motor power drives the M-axis movable coupling plate (634) to move in the Y direction so as to enable the print head assembly (640) to move in the Y direction. 8. The device according to claim 1, in which the device (700) for cleaning is fixedly installed by means of a support plate (714); the plate (712) for cleaning is supported in front and behind by two support beams (713); the sponge (741) in the sponge mechanism (740) is located horizontally on the support plate (742) for the sponge; the support plate (742) for the sponge is supported by the compression spring (743); bath (730) for cleaning the print head is installed below the plate (712) for cleaning; a sealing container (735) is formed between the bath (730) for cleaning the print head and the plate (712) for cleaning; chrome shaft (732) is placed near the bath (730) for cleaning the print head; the cleaning strips (733) and the cleaning strip mounting plate (734) are mounted on the chrome shaft (732), and the two cleaning strips (733) are bolted to the cleaning strip plate (734); finally, the plate (734) for the cleaning strip is mounted on the chrome shaft (732) with the fixing screws; the liquid material sensor (731) is used to detect whether the cleaning liquid is placed in place and to ensure that a portion of the cleaning strips (733) is wetted in the cleaning liquid; paper clamping mechanisms (720) are also supported and mounted on support beams (713) by compression springs (721) for horizontal adjustment of the cleaning plate; and the heights of the paper support plates (723) are adjusted by compression springs (721) to horizontally adjust the cleaning plate so as to ensure that the paper support plates (723) and the cleaning plate (712) meet the same flatness requirements. 9. The device according to claim 1, in which the fluid supply system (800) includes a mounting bracket, a first liquid supply system, a spent liquid regeneration system, a cleaning supply system, a second liquid supply system and other auxiliary devices. wherein the system for supplying the first liquid material includes a first addition point, a primary filter, a first motor, a first storage box, a second motor, a secondary filter, a first solenoid valve, a first flow control valve, and a first actuator; the waste fluid regeneration system includes various waste fluid collection points, a second solenoid valve, a third motor, a collection box, a first filter, a fourth motor, a one-way valve and a regeneration point; the cleaning delivery system includes a cleaning agent addition point, a second filter, a third filter, a second storage box, a fifth motor, a third solenoid valve, a second flow control valve, and a cleaning point; the system for supplying the second liquid material includes a second addition point, a fourth filter, a valve, a third storage box and a second actuator; and other auxiliary devices include a detection position switch, a first pressure detection switch, a second pressure detection switch, a third pressure detection switch, and a welding chamber. 10. The device according to claim 1, in which the device (900) for mixing sand includes pumps (910) for suction of sand, tanks (920) for storing sand, main body (930), tank (940) for mixing sand and containers (950 ) for sand, and the pumps (910) for suction of sand are installed above the tanks (920) for storing sand; the tank (940) for mixing sand is located below the tanks (920) for storing sand; the tank (940) for storing sand is located inside the main body (930) thanks to the transverse beam; sand storage tanks (920), sand mixing tank (940) and sand containers (950) are mounted as one unit on the main body (930); the sand mixing device (900) comprises two sets of sand suction pumps (910), sand storage tanks (920) and sand containers (950), the two sets being independently controlled without affecting each other's operation. : t ! ; WHAT EE VE gave more Ek same about Her I KZ But about more ME ka Ж g st і SHK і ше і шві NI і ny 5 і. s ben KOS o KO EZ 5 NKY zh "I she ku p nm vek b SHO nNnnNnNn i n o. 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