A sand mold printer and a sand mold manufacturing method

Abstract

The application discloses a same-direction sand mold printer and a sand mold manufacturing method. The same-direction sand mold printer comprises a main body device, a sand laying vehicle arranged on the main body device and sliding along the front and back directions, a through channel extending in the front and back directions and arranged on the main body device, a printing station arranged on the through channel, and the sand laying vehicle arranged above the printing station. The sand mold manufacturing method uses the same-direction sand mold printer to manufacture the sand mold. The sand laying direction of the sand laying vehicle and the moving direction of the sand box main body are both the front and back directions, which is beneficial to reduce the horizontal occupation size of the equipment and make the equipment suitable for narrow space.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and in particular to a co-directional sand mold printer and a sand mold manufacturing method. Background Technology

[0002] Sand mold 3D printers, because their products are large casting sand molds, are usually equipped with tracks to move the sand box outside the printer, so as to facilitate cleaning and removal of the sand mold.

[0003] Existing sand mold 3D printers have a sand spreading carriage that spreads sand in a front-to-back direction, while the sand box moves horizontally. The sand spreading direction of the sand spreading carriage is orthogonal to the sand box's horizontal movement direction. Such equipment has some shortcomings. For example, the equipment has a large lateral footprint, making it unsuitable for narrow spaces. Also, the sand box has to pass under the moving guide rail of the sand spreading carriage, which limits the height of the sand box and is not conducive to increasing the maximum printing height. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a co-directional sand mold printer and a sand mold manufacturing method.

[0005] A co-directional sand mold printer according to an embodiment of the present invention includes: The main device includes a base frame and a sand-spreading vehicle that slides along the base frame. The base frame has a passageway extending forward and backward, and the passageway has a printing station. The sand-spreading vehicle is located above the printing station. A sandbox device includes a track extending forward and backward and a sandbox body slidably disposed on the track. The sandbox body is disposed at the printing station, and the top surface of the sandbox body is provided with a printing surface. The recycling device includes a scraper located at the front of the sand spreading vehicle and a recycling trough located at the rear of the sand box body. The bottom end of the scraper is flush with the printing surface, and the recycling trough is located on the lower side of the printing surface.

[0006] The co-directional sand mold printer according to embodiments of the present invention has at least the following technical effects: the sand spreading direction of the sand spreading cart and the moving direction of the sand box body are both in the front-back direction, which helps to reduce the lateral footprint of the equipment and make the equipment suitable for narrow spaces; by setting up a recycling device, after the sand spreading cart moves forward to spread a layer of molding sand, as the sand spreading cart moves backward to return, the scraper can scrape the spread molding sand flat, and the scraped excess molding sand can be collected in the recycling tank for unified recycling, without the need to set up an additional drive device to drive the scraper to move horizontally, and the structure is simple and compact.

[0007] According to some embodiments of the present invention, a recycling pipe is connected to the bottom of the recycling tank, and the recycling pipe is disposed within the passageway; the recycling device further includes a sleeve, which is slidably disposed laterally on the base frame, and the sliding of the sleeve relative to the base frame has a first state and a second state. In the first state, the sleeve is sleeved on the end of the recycling pipe away from the recycling tank, and in the second state, the sleeve is disposed outside the passageway.

[0008] According to some embodiments of the present invention, the recycling device further includes a vacuum conveyor, and the sleeve is connected to the inlet of the vacuum conveyor.

[0009] According to some embodiments of the present invention, the recycling tank is funnel-shaped.

[0010] According to some embodiments of the present invention, a sand-dispersing component is provided on the inner bottom of the recycling tank. The sand-dispersing component is wedge-shaped with its tip pointing upwards, and a first gap is provided between the edge of the sand-dispersing component and the inner wall of the recycling tank.

[0011] According to some embodiments of the present invention, the scraper is rotatably connected to the sand-spreading vehicle, and the sand-spreading vehicle is provided with a sixth drive for driving the scraper to rotate.

[0012] According to some embodiments of the present invention, the sand-spreading vehicle is provided with a roller brush; the scraper has a fifth state and a sixth state in its rotation relative to the sand-spreading vehicle, in the fifth state the bottom end of the scraper is flush with the printing surface, and in the sixth state the bottom end of the scraper is located above the printing surface and in contact with the roller brush.

[0013] According to some embodiments of the present invention, the main device further includes a glue spraying assembly, the glue spraying assembly including a glue spraying frame slidably disposed on the base frame in a back-to-back direction and a nozzle slidably disposed on the glue spraying frame in a transverse direction.

[0014] According to some embodiments of the present invention, the co-directional sand mold printer further includes a cleaning device for cleaning the printhead, the cleaning device being slidably disposed laterally on the base frame, the sliding of the cleaning device relative to the base frame having a third state and a fourth state, in the third state the cleaning device being disposed below the printhead, and in the fourth state the cleaning device being disposed outside the passageway.

[0015] According to the sand mold manufacturing method of the second aspect of the present invention, a sand mold is manufactured using the above-described co-directional sand mold printer.

[0016] According to the second aspect of the present invention, the sand mold manufacturing method has at least the following technical effects: by using the above-mentioned co-directional sand mold printer, the scraper can flatten the laid molding sand, and the excess molding sand scraped out can be collected in the recycling tank for recycling. There is no need to set up an additional drive device to drive the scraper to move horizontally. Moreover, the scraper moves with the sand laying vehicle, eliminating the step of moving the scraper separately, which is beneficial to improving production efficiency.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional structural schematic diagram of a co-directional sand mold printer according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the co-directional sand mold printer from another angle according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the sand box body in one embodiment of the present invention; Figure 4 This is a rear cross-sectional schematic diagram of a recycling tank according to an embodiment of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of a sand-laying vehicle according to an embodiment of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the adhesive spraying assembly in one embodiment of the present invention; In the attached image: 100-Base frame; 200-Sand spreading vehicle; 210-Car frame; 220-Lower sand hopper; 230-Conveyor belt; 240-Roller brush; 241-Fourth drive mechanism; 250-Scraper; 251-Swing arm; 252-Sixth drive; 260-Sand pushing plate; 261-Seventh drive; 300-Sand box body; 310-Printing platform; 320-Side groove; 330-Recovery trough; 340-Recovery pipe; 350-Sleeve; 360-Third drive mechanism; 331-Loose sand component; 400-Railway; 510-Spraying frame; 520-Spray nozzle; 530-Cleaning device; 540-Fifth drive mechanism. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and for simplifying the description, and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] The following is for reference. Figures 1 to 6 This invention describes a co-directional sand mold printer and a sand mold manufacturing method according to embodiments of the present invention.

[0023] A co-directional sand mold printer according to a first aspect of the present invention includes a main body device, a sand box device, and a recycling device.

[0024] Reference Figure 1 The main device includes a base frame 100 and a sand-spreading vehicle 200 that slides along the base frame 100. The base frame 100 has two main beams that extend forward and backward and are spaced apart on the left and right. The sand-spreading vehicle 200 includes a frame 210, a lower sand hopper 220 and a conveyor belt 230 located on the frame 210. The left and right ends of the frame 210 are slidably located on the upper side of the two main beams through a guide rail slider mechanism. The base frame 100 has a first drive mechanism for driving the frame 210 to move forward and backward. The bottom of the lower sand hopper 220 has a horizontally extending strip-shaped sand outlet. The conveyor belt 230 conveys forward and is spaced apart on the lower side of the lower sand hopper 220. When the conveyor belt 230 starts, it transports the molding sand falling from the sand outlet to the front end of the conveyor belt 230 and then falls down. When the conveyor belt 230 stops, the molding sand falling from the sand outlet is blocked by the conveyor belt 230, that is, no sand is discharged. In addition to the structure of the sand hopper 220 and the conveyor belt 230, the sand spreading vehicle 200 also adopts other structures. The sand spreading vehicle 200 is a conventional component in this field, and its specific structure will not be described in detail here.

[0025] The base frame 100 is provided with a passageway extending from front to back. The passageway is located between two main beams and runs through the base frame 100 from front to back. The passageway is provided with a printing station, and the sand spreading vehicle 200 is located above the printing station.

[0026] The sand box device includes a front-to-back extending track 400 and a sand box body 300 slidably disposed on the track 400. The sand box body 300 is located on the upper side of the track 400, and the front end or rear end of the track 400 is located outside the base frame 100, so that the sand box body 300 can be moved outside the base frame 100 to facilitate the removal of the printed sand mold. The sand box body 300 is located at the printing station, and the top surface of the sand box body 300 is provided with a printing surface. The middle part of the sand box body 300 is provided with a lifting channel extending downward from the top surface of the sand box body 300. A printing platform 310 is provided in the lifting channel. The sand box body 300 is provided with a second driving mechanism for driving the printing platform 310 to lift and lower. When the printing platform 310 moves to its upper limit position, the printing platform 310 is flush with the top surface of the sand box body 300. The sand box body 300 is a conventional component in this field, and its specific structure will not be described in detail here.

[0027] The recycling device includes a scraper 250 located at the front of the sand spreading vehicle 200 and a recycling trough 330 located at the rear of the sand box body 300. The scraper 250 is a horizontally arranged strip-shaped plate. The scraper 250 is vertically arranged and located in front of the conveyor belt 230. The top of the recycling trough 330 has an open opening, which is a horizontally arranged strip-shaped opening. The horizontal dimension of the open opening is larger than the horizontal dimension of the scraper 250. The left and right ends of the open opening protrude from the left and right ends of the scraper 250, respectively. The bottom end of the scraper 250 is flush with the printing surface. The printing platform 310 is located between the left and right ends of the scraper 250. The recycling trough 330 is located below the printing surface, so that when the scraper 250 moves backward relative to the sand box body 300, the scraper 250 can move backward close to the printing surface to scrape off excess molding sand and push it into the recycling trough 330.

[0028] The sand-laying direction of the sand-laying cart 200 and the moving direction of the sand box body 300 are both forward and backward, which helps to reduce the lateral footprint of the equipment and makes it suitable for narrow spaces. The sand box body 300 does not need to pass under the two main beams, and the top of the sand box body 300 can overlap with the two main beams, meaning that the sand box body 300 can be made with a larger height, which is beneficial for increasing the maximum printing height. By setting up a recycling device, after the sand-laying cart 200 moves forward to lay a layer of molding sand, as the sand-laying cart 200 moves backward to return, the scraper 250 can scrape the laid molding sand to flatten it. The scraped-out molding sand can be collected in the recycling tank 330 for unified recycling. There is no need to set up an additional drive device to drive the scraper 250 to move horizontally, which makes the structure simple and compact, and helps to reduce equipment costs and size.

[0029] In some embodiments of the present invention, the front and rear ends of the track 400 are located outside the base frame 100. Two sand box bodies 300 are provided on the track 400, which are respectively referred to as Sand Box No. 1 and Sand Box No. 2. In use, when Sand Box No. 1 is printing at the printing station, Sand Box No. 2 is located outside the main body device to clean and remove the printed sand mold. After Sand Box No. 1 finishes printing, it moves to the end of the track 400 away from Sand Box No. 2 to clean and remove the sand mold, while Sand Box No. 2 moves to the printing station for printing. Thus, the two sand box bodies 300 can print alternately, improving production efficiency.

[0030] In some embodiments of the present invention, reference is made to... Figure 2 The bottom of the recycling tank 330 is connected to a recycling pipe 340. One end of the recycling pipe 340 is connected to the recycling tank 330, and the other end of the recycling pipe 340 extends laterally. The recycling pipe 340 is located in the passageway so that the recycling pipe 340 will not touch the main body device when the sand box body 300 moves along the track 400. The recycling device also includes a sleeve 350, which is slidably mounted on the base frame 100. The base frame 100 is provided with a third drive mechanism 360 for driving the sleeve 350 to move laterally. The sliding of the sleeve 350 relative to the base frame 100 has a first state and a second state. In the first state, the sleeve 350 is fitted on the end of the recycling pipe 340 away from the recycling tank 330. In the second state, the sleeve 350 is located outside the passageway. The inner diameter of the sleeve 350 is larger than the outer diameter of the recycling pipe 340, so that in the first state, the sleeve 350 is fitted on the outside of the recycling pipe 340. During printing, the third drive mechanism 360 drives the sleeve 350 to the first state, so that the molding sand in the recovery tank 330 can be transported to the outside of the sand box device through the recovery pipe 340 and the sleeve 350. Therefore, the volume of the recovery tank 330 does not need to accommodate the molding sand scraped out during the entire printing process. The recovery tank 330 can be made to be smaller in size to avoid the recovery tank 330 being too large and affecting the flexible movement of the sand box body 300. Before or after printing, when the sand box body 300 moves along the track 400, the third drive mechanism 360 drives the sleeve 350 to the second state, and the sleeve 350 will not hinder the movement of the sand box body 300.

[0031] In some embodiments of the present invention, the recovery device further includes a vacuum conveyor, with a sleeve 350 connected to the inlet of the vacuum conveyor. The vacuum conveyor is a conventional component in the art, and its specific structure will not be described in detail here. The sleeve is connected to the inlet of the vacuum conveyor via a flexible hose, ensuring that the vacuum conveyor does not obstruct the movement of the recovery pipe 340. The vacuum conveyor can be fixedly installed relative to the base frame 100. The vacuum conveyor generates negative pressure in the sleeve 350, thereby sucking up the molding sand in the recovery tank 330 and collecting the sucked-up molding sand in a device for recovering molding sand outside the passageway. This prevents molding sand from clogging the recovery pipe 340 and the sleeve 350, ensuring a smooth flow of recovered molding sand.

[0032] In some embodiments of the present invention, the recovery tank 330 is funnel-shaped. This allows the molding sand within the recovery tank 330 to slide down under its own weight into the recovery pipe 340 located at the bottom of the recovery tank 330, facilitating the recovery of the molding sand.

[0033] In some embodiments of the present invention, reference is made to... Figure 4 The bottom inner side of the recovery tank 330 is provided with a sand-dispersing component 331. The sand-dispersing component 331 is wedge-shaped with its tip pointing upwards, and a first gap is provided between the edge of the sand-dispersing component 331 and the inner wall of the recovery tank 330. The sand-dispersing component 331 can be formed by bending a metal plate. The sand-dispersing component 331 is inverted "V" shape. When the molding sand slides down in the recovery tank 330, it will touch the sand-dispersing component 331. The sand-dispersing component 331 can break the aggregated molding sand and disperse the molding sand through the first gap so that the molding sand can enter the recovery pipe 340.

[0034] In some embodiments of the present invention, reference is made to... Figure 5 The scraper 250 is rotatably connected to the sand spreading vehicle 200, and the sand spreading vehicle 200 is provided with a sixth driver 252 for driving the scraper 250 to rotate. The scraper 250 is fixedly connected to a horizontally arranged first rotating shaft. The scraper 250 is rotatably connected to the frame 210 through the first rotating shaft. The first rotating shaft is located at the top of the scraper 250. A swing rod 251 extending radially along the first rotating shaft is fixedly connected to the first rotating shaft. The sixth driver 252 can be a vertically arranged cylinder. The top end of the sixth driver 252 is hinged to the frame 210, and the bottom end of the sixth driver 252 is hinged to the end of the swing rod 251 away from the first rotating shaft. Thus, starting the sixth driver 252 can drive the scraper 250 to rotate. The rotation of the scraper 250 relative to the sand spreading vehicle 200 has a fifth state and a sixth state. In the fifth state, the scraper 250 is vertically arranged, and the bottom end of the scraper 250 is flush with the printing surface. In the sixth state, the scraper 250 is inclined downward from front to back, and the bottom end of the scraper 250 is located above the printing surface. When the sand-spreading vehicle 200 moves forward to spread sand, the sixth driver 252 can be controlled to drive the scraper 250 to the sixth state, preventing the scraper 250 from pushing the molding sand protruding from the printing surface to the front of the sand box, thereby preventing excess molding sand from being pushed to the front of the sand box body 300 and causing the problem of non-recyclability. When the sand-spreading vehicle 200 moves backward to reset, the sixth driver 252 can be controlled to drive the scraper 250 to the fifth state, and the scraper 250 can push the excess molding sand backward to the recycling tank 330.

[0035] In some embodiments of the present invention, the sand-spreading vehicle 200 is equipped with a roller brush 240, the roller brush 240 having a transverse axial direction, and the roller brush 240 is disposed between the conveyor belt 230 and the scraper 250. The sand-spreading vehicle 200 is equipped with a fourth drive mechanism 241 for driving the roller brush 240 to rotate; in the sixth state, the bottom end of the scraper 250 contacts the roller brush 240. Thus, when the sand-spreading vehicle 200 moves forward to spread sand and the scraper 250 is in the sixth state, the roller brush 240 can be controlled to rotate, thereby cleaning the scraper 250, removing the molding sand accumulated on the scraper 250, and preventing excessive accumulation of molding sand on the scraper 250 from causing operational difficulties.

[0036] In some embodiments of the present invention, reference is made to... Figure 3 The sand box body 300 has two side grooves 320, each side groove 320 being a strip extending front to back. The printing surface is located between the two side grooves 320. The side grooves 320 are recessed downward from the printing surface, and the rear end of the side grooves 320 is open. The recovery trough 330 extends laterally to below the rear end of the two side grooves 320, so that the molding sand in the side grooves 320 can fall into the recovery trough 330 when pushed backward. The sand spreading vehicle 200 is equipped with a sand pushing mechanism for each side groove 320. The sand pushing mechanism is connected to the frame 210. The sand pushing mechanism includes a sand pushing plate 260 and a seventh driver 261 for driving the sand pushing plate 260 to rise and fall. The seventh driver 261 can be a cylinder. The sand pushing plate 260 is located above the side groove 320. The lateral dimension of the sand pushing plate 260 is smaller than the lateral dimension of the side groove 320, so that the sand pushing plate 260 can be inserted into the side groove 320 from top to bottom.

[0037] It is understandable that when the scraper 250 pushes excess molding sand, some molding sand may overflow from both ends of the scraper 250 and fall from the left and right sides of the sand box body 300, making it unrecoverable. In this embodiment, by setting the side groove 320 and the sand pushing mechanism, the molding sand overflowing from both ends of the scraper 250 can fall into the side groove 320. When the sand spreading vehicle 200 moves forward to spread sand, the seventh drive 261 drives the sand pushing plate 260 to rise, so that the sand pushing plate 260 will not push the molding sand in the side groove 320 forward. When the sand spreading vehicle 200 moves backward to return, the seventh drive 261 drives the sand pushing plate 260 to fall, so that the sand pushing plate 260 pushes the molding sand in the side groove 320 backward to fall into the recycling tank 330 for molding sand recycling.

[0038] In some embodiments of the present invention, reference is made to... Figure 6The main device also includes a glue spraying assembly, which includes a glue spraying frame 510 slidably mounted on the base frame 100 along the front and back, and a nozzle 520 slidably mounted on the glue spraying frame 510 along the side. The nozzle 520 is used to spray adhesive, and the spray holes of the nozzle 520 are located on its bottom surface. The structure of the nozzle 520, the sliding connection structure between the glue spraying frame 510 and the base frame 100, the moving power structure of the glue spraying frame 510, the sliding connection structure between the nozzle 520 and the glue spraying frame 510, and the moving power structure of the nozzle 520 are all conventional technical means in the field, and their specific structures will not be described in detail here. By setting the nozzle 520 on the glue spraying frame 510, the nozzle 520 does not need to move with the sand spreading cart 200. When the sand spreading cart 200 lays a layer of molding sand and returns to its original position to replenish the molding sand, the nozzle 520 can spray adhesive. That is, the sand spreading cart 200 replenishing molding sand and the nozzle 520 spraying adhesive can be carried out simultaneously, which is beneficial to improving printing efficiency.

[0039] In some embodiments of the present invention, the co-directional sand mold printer further includes a cleaning device 530 for cleaning the printhead 520. The cleaning device 530 is laterally slidable on the base frame 100. The sliding of the cleaning device 530 relative to the base frame 100 has a third state and a fourth state. In the third state, the cleaning device 530 is located below the printhead 520 and within the passageway. In the fourth state, the cleaning device 530 is located outside the passageway. The cleaning device 530 includes a receiving groove and a scraper plate disposed in the receiving groove. The scraper plate is laterally disposed and is used to scrape off excess adhesive from the bottom surface of the printhead 520. The receiving groove is used to collect the scraped adhesive. The cleaning device 530 for cleaning the printhead 520 is a conventional component in the art, and its specific structure will not be described in detail here. The base frame 100 is provided with a fifth drive mechanism 540 for driving the cleaning device 530 to move laterally. When the sand box body 300 moves along the track 400 before or after printing, the fifth drive mechanism... The fifth drive mechanism 540 drives the cleaning device 530 to the fourth state, and the cleaning device 530 does not obstruct the movement of the sand box body 300. During the printing process, the fifth drive mechanism 540 drives the sleeve 350 to the third state. When it is necessary to clean the nozzle 520, the nozzle 520 is controlled to move above the scraper and move back and forth relative to the scraper to scrape off excess adhesive. Since the nozzle 520 does not need to move together with the sand spreading carriage 200, the cleaning of the nozzle 520 and the sand spreading of the sand spreading carriage 200 can be carried out simultaneously, which is beneficial to improving printing efficiency.

[0040] Among them, the first drive mechanism, the second drive mechanism, the third drive mechanism 360, and the fifth drive mechanism 540 are all conventional linear drive mechanisms, such as cylinders, linear motors, electric push rods, mechanisms that drive synchronous belts and synchronous pulleys by motors, mechanisms that drive ball screws by motors, etc. Their specific mechanisms will not be described in detail here; the fourth drive mechanism 241 is an electric motor or other suitable rotary drive.

[0041] The sand mold manufacturing method of the second aspect of the present invention uses the above-described co-directional sand mold printer to manufacture sand molds. The manufacturing method includes the following steps: Step S100: Move the sand box body 300 to the printing station along the track 400; Step S200: Move the sleeve 350 to the second state; Step S300: Print the sand mold; Step S400: After the sand mold printing is completed, move the sleeve 350 to put the sleeve 350 in the first state. Step S500: Move the sand box body 300 outside the main device along the track 400; Step S600: Remove the sand mold from the sand box body 300.

[0042] Specifically, step S200 includes: moving the sleeve 350 to the second state and starting the vacuum conveyor.

[0043] Specifically, step S300 includes: Step S310: Control scraper 250 to the sixth state; Step S320: Control the sand-laying vehicle 200 to move forward to lay a layer of molding sand; Step S330: Control scraper 250 to be in the fifth state; Step S340: Control the sand spreading vehicle 200 to move backward and reset; Step S350: Control the glue spraying assembly to spray glue; Step S360: Repeat steps S310 to S350 until the sand mold printing is completed.

[0044] By using the aforementioned co-directional sand mold printer, the scraper 250 can level the laid molding sand, and the excess molding sand scraped out can be collected in the recycling tank 330 for recycling. There is no need to set up an additional drive device to drive the scraper 250 to move horizontally. Moreover, the scraper 250 moves with the sand spreading vehicle 200, eliminating the step of moving the scraper 250 separately, which helps to improve production efficiency.

[0045] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A co-directional sand mold printer, characterized in that, include: The main device includes a base frame and a sand-spreading vehicle that slides along the base frame. The base frame has a passageway extending forward and backward, and the passageway has a printing station. The sand-spreading vehicle is located above the printing station. A sandbox device includes a track extending forward and backward and a sandbox body slidably disposed on the track. The sandbox body is disposed at the printing station, and the top surface of the sandbox body is provided with a printing surface. The recycling device includes a scraper located at the front of the sand spreading vehicle and a recycling trough located at the rear of the sand box body. The bottom end of the scraper is flush with the printing surface, and the recycling trough is located on the lower side of the printing surface. The bottom of the recycling tank is connected to a recycling pipe, which is located within the passageway. The recycling device also includes a sleeve that is slidably mounted on the base frame. The sleeve has a first state and a second state in its sliding relative to the base frame. In the first state, the sleeve is mounted on the end of the recycling pipe away from the recycling tank. In the second state, the sleeve is located outside the passageway. The base frame is equipped with a drive mechanism for driving the sleeve to move laterally. During printing, the drive mechanism drives the sleeve to the first state, so that the molding sand in the recovery tank can be transported to the outside of the sand box device through the recovery pipe and the sleeve. Before or after printing, when the sand box body moves along the track, the drive mechanism drives the sleeve to the second state.

2. The co-directional sand mold printer according to claim 1, characterized in that: The recovery device also includes a vacuum conveyor, and the sleeve is connected to the inlet of the vacuum conveyor.

3. The co-directional sand mold printer according to claim 2, characterized in that: The recycling tank is funnel-shaped.

4. The co-directional sand mold printer according to claim 3, characterized in that: The bottom inner side of the recycling tank is provided with a sand-dispersing component, which is wedge-shaped with its tip pointing upwards, and a first gap is provided between the edge of the sand-dispersing component and the inner wall of the recycling tank.

5. The co-directional sand mold printer according to claim 1, characterized in that: The scraper is rotatably connected to the sand-spreading vehicle, which is equipped with a driver for rotating the scraper.

6. The co-directional sand mold printer according to claim 5, characterized in that: The sand-spreading vehicle is equipped with a roller brush; the scraper has a fifth state and a sixth state relative to the rotation of the sand-spreading vehicle. In the fifth state, the bottom end of the scraper is flush with the printing surface, and in the sixth state, the bottom end of the scraper is located above the printing surface and in contact with the roller brush.

7. The co-directional sand mold printer according to claim 1, characterized in that: The main device also includes a glue spraying assembly, which includes a glue spraying frame that is slidably disposed on the base frame in a back-to-back manner and a nozzle that is slidably disposed on the glue spraying frame in a transverse manner.

8. The co-directional sand mold printer according to claim 7, characterized in that: It also includes a cleaning device for cleaning the nozzle, the cleaning device being slidably disposed on the base frame in a lateral direction, the sliding of the cleaning device relative to the base frame having a third state and a fourth state, in the third state the cleaning device is disposed below the nozzle, and in the fourth state the cleaning device is disposed outside the passageway.

9. A method for manufacturing sand molds, characterized in that: Sand molds are manufactured using a co-directional sand mold printer as described in any one of claims 1-8.

Images