Sand mold 3D printing full-process automatic production line and production method thereof

Abstract

The invention relates to the technical field of 3D printing, and discloses a sand mold 3D printing full-process automatic production line and a production method.The production line comprises a sand mold printing area, an auxiliary equipment area, a dip-coating detection area, a drying area and a plurality of transfer equipment, the sand mold printing area comprises a plurality of sand mold 3D printing equipment, and each sand mold 3D printing equipment comprises a printing work box; a sand mold printed by the sand mold 3D printing equipment is contained in the printing work box. The sand mold 3D printing process can be unified, the product quality and the production efficiency can be improved, and the labor cost is reduced. According to the production line, full-automatic control is adopted, the whole production line is provided with transfer equipment for transferring sand molds, unattended operation can be achieved, the production efficiency is higher, manpower consumption is lower, the production line is provided with a visual inspection station for detecting defects of the sand molds subjected to paint dip-coating, unqualified sand molds are prevented from flowing out, and the production efficiency of the produced sand molds is greatly improved from the beginning of design to the completion of pouring. And the whole process can be traced.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular, to a fully automated production line for the entire process of sand mold 3D printing and its production method. Background Art

[0002] Traditional sand mold casting has problems such as long mold manufacturing cycle, high cost, and difficulty in dealing with parts with complex structures. With the rapid development of 3D printing technology, sand mold 3D printing has gradually attracted attention due to its advantages of speed, flexibility, and precision. However, existing sand mold 3D printing equipment is mostly limited to single-piece or small-batch production and is difficult to meet the production requirements of large scale and high efficiency.

[0003] Existing 3D printing casting production lines usually include a 3D printing station, a sand blowing chamber, a drying chamber, an impregnation coating chamber, a surface drying chamber, a core assembly station, and a pouring station connected in sequence along the traveling direction of the roller path. There is only 1 3D printing device in this production line arrangement, and the 3D printing time is relatively long. Therefore, the idle rates of the sand blowing chamber, drying chamber, and impregnation coating chamber are high, and there is no sand mold inspection station in the production line, making it easy to let unqualified products flow out. Summary of the Invention

[0004] The purpose of the present invention is to provide a fully automated production line for the entire process of sand mold 3D printing to solve the problems raised in the above background art. To achieve the above purpose, on the one hand, the present invention provides a fully automated production line for the entire process of sand mold 3D printing, including:

[0005] A sand mold printing area, the sand mold printing area includes a plurality of sand mold 3D printing devices, the sand mold 3D printing devices include printing work boxes, and the sand molds printed by the sand mold 3D printing devices are accommodated in the printing work boxes;

[0006] An auxiliary equipment area, which is used to perform heat preservation and solidification, core removal, and sand cleaning operations on the sand molds in sequence according to the printing process;

[0007] An impregnation coating and inspection area, which is used to impregnate the sand molds after removing floating sand with coating and perform inspections on them;

[0008] A drying area, which is used to dry the coating on the surface of the sand molds after passing the inspection;

[0009] Transfer equipment, at least two transfer equipment are provided, which are used to transfer the printing work boxes filled with the sand molds between the sand mold printing area, the auxiliary equipment area, the impregnation coating and inspection area, and the drying area according to the printing process or transfer the empty printing work boxes into the sand mold 3D printing devices;

[0010] The sand mold printing area, the auxiliary equipment area, the dip coating and inspection area, the drying area, and the transfer equipment are connected through network signals.

[0011] Preferably, the auxiliary equipment area includes a heat preservation chamber, a core removal chamber, and a sand cleaning chamber arranged in sequence along the printing process;

[0012] The heat preservation chamber is used for heat preservation and curing of the sand mold;

[0013] The core removal chamber is used for core removal of the sand mold after heat preservation and curing, and removing uncured sand;

[0014] The sand cleaning chamber is used for removing floating sand on the surface of the sand mold after core removal.

[0015] Preferably, the dip coating and inspection area includes a dip coating tank, a first robotic arm, a conveyor roller path, a vision inspection station, a second robotic arm, a non-conforming product stacking area, and a tray arranged in sequence along the printing process;

[0016] The first robotic arm is used to put the sand mold after sand cleaning into the dip coating tank for dip coating and place the dip-coated sand mold on the conveyor roller path;

[0017] The conveyor roller path is used to convey the dip-coated sand mold to the vision inspection station for qualification inspection;

[0018] The second robotic arm is used to place the non-conforming sand mold in the non-conforming product stacking area or place the qualified sand mold on the tray.

[0019] Preferably, the vision inspection station includes a surface inspection station and a precision inspection station. The surface inspection station is used to detect whether there are defects on the surface of the dip-coated sand mold, and the precision inspection station is used to perform precision inspection on the sand mold that has passed the surface inspection.

[0020] Preferably, positioning devices and automatic doors for positioning the printing work box are provided in the sand mold 3D printing equipment, the heat preservation chamber, the core removal chamber, the sand cleaning chamber, and the drying area.

[0021] Preferably, the drying area includes a surface drying furnace.

[0022] Preferably, the transfer equipment is an AGV transfer vehicle. On the other hand, the present invention also provides a fully automated production method for sand mold 3D printing, which is characterized by including the following steps:

[0023] Obtain the printing conditions of multiple sand mold 3D printing devices;

[0024] According to the printing situation, control the transfer device to transfer the printing workbox that has completed the sand mold printing to the auxiliary equipment area to queue up for heat preservation and curing, core removal, and sand cleaning operations in sequence, and control the other transfer device to transfer the empty printing workbox into the sand mold 3D printing device;

[0025] After the sand cleaning is completed, the transfer device transfers the sand mold after sand cleaning to the dip coating and inspection area and sequentially performs dip coating and inspection on the sand mold after sand cleaning;

[0026] The transfer device transfers the sand mold with qualified inspection to the drying area for drying, and sends the sand mold with unqualified inspection to the used sand treatment area for used sand regeneration;

[0027] The dried sand mold is transferred to the casting workshop for core assembly and pouring through the transfer device.

[0028] Preferably, the temperature for heat preservation and curing is 30°C - 40°C, and the time is 1 - 2h.

[0029] Preferably, the temperature for drying is 110°C - 130°C, and the time is 1 - 2h. The beneficial effects of the present invention are as follows:

[0030] The present invention can unify the sand mold 3D printing process, improve product quality and production efficiency, and reduce labor costs. This production line adopts full-automatic control, and the whole line is equipped with transfer devices for transferring sand molds, which can achieve unattended operation, higher production efficiency, and less manpower consumption. This production line is equipped with a vision inspection station for detecting defects of the sand mold after dip coating the coating to prevent unqualified sand molds from flowing out. The entire process of the produced sand mold from design to pouring can be traced.

[0031] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the following specific implementation, but do not constitute a limitation to the present invention. In the drawings:

[0033] Figure 1 Shows the production flow chart of the fully automated production line for sand mold 3D printing according to an embodiment of the present invention;

[0034] Figure 2 Shows the structural schematic diagram of the fully automated production line for sand mold 3D printing according to an embodiment of the present invention;

[0035] Figure 3Schematic diagram of the composition of the auxiliary equipment area according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the composition of the dip coating detection area according to an embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the structure of a sand mold 3D printing device according to an embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the installation of the positioning device according to an embodiment of the present invention (taking the heat preservation chamber as an example). Explanation of reference numerals:

[0039] 1 Sand mold printing area, 11 Sand mold 3D printing device, 101 Printing work box, 102 Sand mold;

[0040] 2 Auxiliary equipment area, 21 Heat preservation chamber, 22 Core removal chamber, 23 Sand cleaning chamber, 201 Positioning device, 202 Automatic door;

[0041] 3 Dip coating detection area, 31 Dip coating tank, 32 First robotic arm, 33 Conveyor roller path, 34 Vision inspection station, 341 Surface inspection station, 342 Precision inspection station, 35 Second robotic arm, 36 Rejected product stacking area, 37 Pallet;

[0042] 4 Drying area, 5 Transfer equipment. Detailed implementation manners

[0043] The following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example 1

[0044] Please refer to Figures 1-6 , this embodiment discloses an automated production line for the entire process of sand mold 3D printing, including multiple sand mold printing areas 1, auxiliary equipment areas 2, dip coating detection areas 3, drying areas 4, and at least two transfer equipment 5. The sand mold printing area 1, auxiliary equipment area 2, dip coating detection area 3, drying area 4, and transfer equipment 5 are connected through network signals, and the operation information between each device is transmitted and saved to the cloud through the network.

[0045] Among them, the sand mold printing area 1 is used to produce the sand mold 102, the auxiliary equipment area 2 is used to perform heat preservation and curing, core removal, and sand cleaning operations on the sand mold 102 in sequence according to the printing process, the dip coating and inspection area 3 is used to dip coat the sand mold 102 after removing the floating sand and perform inspections on it; the drying area 4 is used to dry the coating on the surface of the inspected sand mold 102, and the transfer equipment 5 is used to convey the printing workbox 101 filled with the sand mold 102 between the sand mold printing area 1, the auxiliary equipment area 2, the dip coating and inspection area 3, and the drying area 4 according to the printing process or convey the empty printing workbox 101 into the sand mold 3D printing equipment 11.

[0046] In this embodiment, the sand mold 3D printing equipment 11 is a binder jet sand mold 3D printing equipment. The sand mold 3D printing equipment 11 includes a printing workbox 101, and the sand mold 102 printed by the sand mold 3D printing equipment 11 is accommodated in the printing workbox 101. A lifting platform is arranged in the printing workbox 101. The drying area 4 includes a surface drying furnace, and the transfer equipment 5 is an AGV transfer vehicle.

[0047] There are 10 sand mold 3D printing equipment 11, and 10 sand mold 3D printing equipment 11 produce sand molds 102 simultaneously. 4 transfer equipment 5 are configured. Please refer to Figure 1 , the production process of the production line in this embodiment specifically includes sand mold 3D printing - heat preservation - core removal - sand cleaning - dip coating - inspection - drying - sending to the casting production line for core assembly and pouring. Specifically, when the scheduling center receives a production task, it sends printing information to the automatic control center. The automatic control center will issue instructions according to the status of the binder jet sand mold 3D printing equipment, and 10 sand mold 3D printing equipment 11 start sand mold printing. When any one of the 10 sand mold 3D printing equipment 11 finishes printing, the AGV transfer vehicle moves to this printing equipment and moves the printing workbox 101 with the sand mold 102 printed to the auxiliary equipment area 2, and another AGV transfer vehicle moves the empty printing workbox 101 into this printing equipment for the next round of sand mold printing, realizing non-stop printing of the equipment. If multiple sand mold 3D printing equipment 11 finish printing simultaneously, the same number of AGV transfer vehicles will transfer the printing workboxes 101 with the sand mold 102 printed to the auxiliary equipment area 2 and queue up for heat preservation and curing, core removal, sand cleaning and other operations in sequence. The sand molds printed by the same printing equipment have higher uniformity, thereby improving the product quality and production efficiency and reducing the labor cost; the automatic control center controls the AGV transfer vehicle to transfer the sand mold 102 according to the status of each equipment, and the idle rate of the equipment in the auxiliary equipment area 2 is greatly reduced, improving the production efficiency. After the sand mold 102 is sand cleaned, the AGV transfer vehicle transfers the sand mold 102 to the dip coating and inspection area 3 for dip coating and inspection of the sand mold 102. After inspection, the AGV transfer vehicle transfers the sand mold to the surface drying furnace for drying. After drying, the AGV transfer vehicle sends the sand mold to the casting production line for core assembly and pouring.

[0048] Please refer to Figure 3 , in this embodiment, the auxiliary equipment area 2 includes a heat preservation chamber 21, a core removal chamber 22, and a sand cleaning chamber 23 arranged in sequence along the printing process. Among them, the heat preservation chamber 21 is used to heat and cure the sand mold 102, the core removal chamber 22 is used to remove the uncured sand from the sand mold 102 after heat preservation and curing, and the sand cleaning chamber 23 is used to remove the floating sand on the surface of the sand mold 102 after core removal.

[0049] The specific working process is that the AGV transfer vehicle first transfers the printing workbox 101 that has completed the printing of the sand mold 102 to the heat preservation chamber 21 and keeps it warm for 1 - 2 hours in an environment of 30°C - 40°C. These process parameters are issued by the automatic control center. After the heat preservation is completed, the AGV transfer vehicle continues to transfer the sand mold 102 to the core removal chamber 22. In the core removal chamber 22, the platform of the printing workbox 101 rises, and at the same time, the uncured sand in the printing workbox 101 is removed, and the sand mold 102 remains on the platform of the printing workbox 101. Then the AGV transfer vehicle transfers the sand mold 102 to the sand cleaning chamber 23 to remove the floating sand on the surface of the sand mold 102, ensuring the accuracy of the cast product after pouring.

[0050] Please refer to Figure 4 , the dip coating and inspection area 3 includes a dip coating tank 31, a first robotic arm 32, a conveyor roller track 33, a vision inspection station 34, a second robotic arm 35, a non - conforming product stacking area 36, and a tray 37 arranged in sequence along the printing process. The first robotic arm 32 is used to put the sand mold 102 after sand cleaning into the dip coating tank 31 to dip - coat the coating and place the dip - coated sand mold 102 on the conveyor roller track 33. The conveyor roller track 33 is used to convey the dip - coated sand mold 102 to the vision inspection station 34 for qualification inspection. The second robotic arm 35 is used to transfer the sand mold 102 that fails the inspection to the non - conforming product stacking area 36 or place the sand mold 102 that passes the inspection on the tray 37.

[0051] Specifically, after the sand mold 102 is cleaned of sand, the AGV transfer vehicle transports the sand mold 102 to near the first robotic arm 32. The first robotic arm 32 grabs the sand mold 102 from the AGV transfer vehicle and immerses it in the dip coating tank 31 for dip coating with paint. The dip-coated sand mold 102 is transferred from the dip coating tank 31 to the conveyor roller track 33 by the first robotic arm 32. The conveyor roller track 33 transports the sand mold 102 to the vision inspection station 34 for inspection of the sand mold 102. The vision inspection station 34 will detect whether the sand mold 102 is qualified, process the detected information by itself, judge whether the sand mold 102 is qualified, and then transmit the information to the automatic control center. At the second robotic arm 35, the automatic control center will send an instruction to the second robotic arm 35. The qualified sand mold 102 will be grabbed onto the tray 37 and sent to the surface drying furnace by the AGV transfer vehicle for drying the sand mold 102 for 1 - 2 hours in an environment of 110°C - 130°C. The unqualified sand mold 102 will be grabbed onto the unqualified sand mold stacking area 36. When the unqualified sand mold storage is full, the AGV transfer vehicle will send the unqualified sand mold to the used sand treatment area for used sand regeneration. The sand mold after surface coating with paint needs to be dried in the surface drying furnace. After drying is completed, the sand mold 102 has been processed. The dried sand mold 102 is transported by the AGV transfer vehicle to the foundry workshop for core assembly and pouring.

[0052] Specifically, the vision inspection station 34 includes a surface inspection station 341 and a precision inspection station 342. The surface inspection station 341 is used to detect whether there are defects on the surface of the dip-coated sand mold 102, and the precision inspection station 342 is used to perform precision inspection on the sand mold 102 that has passed the surface inspection.

[0053] The conveying direction of the conveyor roller track 33 is from left to right. The dip-coated sand mold 102 will pass through the surface inspection station 341 and the precision inspection station 342 in sequence. If the surface inspection station 341 detects that the sand mold 102 has defects, the precision inspection station 342 will not perform precision inspection. The sand mold 102 is transported to the second robotic arm 35, and the automatic control center will send an instruction to the second robotic arm 35 to directly place the sand mold 102 in the unqualified sand mold stacking area 36. If the surface of the sand mold 102 has no defects, the precision inspection station 342 will detect its precision. If the precision does not meet the requirements, the second robotic arm 35 will also place the sand mold 102 in the unqualified sand mold stacking area 36. For the qualified sand mold 102, the second robotic arm 35 will grab it and place it on the tray 37, and the AGV transfer vehicle will transport the qualified sand mold 102 to the surface drying furnace for surface drying. The vision inspection station 34 will transmit the detected information to the automatic control center. The printed unqualified sand mold 102 will be sent an instruction by the automatic control center to the binder jet sand mold 3D printing equipment for reprinting, and the detection information and printing process information of the qualified sand mold 102 will be automatically saved.

[0054] Preferably, positioning devices 201 and automatic doors 202 for positioning the printing workbox 101 are provided in the sand mold 3D printing device 11, the heat preservation chamber 21, the core removal chamber 22, the sand cleaning chamber 23, and the drying area 4. After the sand mold 3D printing device 11, the heat preservation chamber 21, the core removal chamber 22, the sand cleaning chamber 23, and the drying area 4 have completed their respective operations, the automatic door 202 automatically opens, and the AGV transfer vehicle moves out the corresponding printing workbox 101, with a higher degree of automation. Embodiment 2

[0055] On the other hand, the present invention also provides a fully automated production method for sand mold 3D printing, including the following steps:

[0056] S1: Obtain the printing status of multiple sand mold 3D printing devices 11, that is, whether the sand mold 3D printing device 11 has completed printing. If it has, proceed to the next step; if not, continue to wait.

[0057] S2: Control the transfer device 5 to transfer the printing workbox 101 that has completed the printing of the sand mold 102 to the auxiliary equipment area 2 to queue up for heat preservation and curing, core removal, and sand cleaning operations in sequence, and control another transfer device 5 to transfer the empty printing workbox 101 into the sand mold 3D printing device 11. Specifically, the control center issues an order to the transfer device 5, and the transfer device 5 transfers the printing workbox 101 that has completed the printing of the sand mold 102 to the heat preservation chamber 21 to be heat-preserved at 30°C to 40°C for 1 to 2 hours, the core removal chamber 22 for core removal, and the sand cleaning chamber 23 for sand cleaning. At the same time, another transfer device 5 transfers the empty printing workbox 101 into the printing device for printing work.

[0058] S3: After sand cleaning is completed, the transfer device 5 transfers the sand mold 102 after sand cleaning to the dip coating and inspection area 3 and successively performs dip coating and inspection on the sand mold 102 after sand cleaning. Specifically, the transfer device 5 transfers the sand mold to the first robotic arm 32, and the first robotic arm 32 grabs the sand mold 102 from the transfer device 5 and immerses it in the dip coating tank 31 for dip coating the paint. The sand mold 102 after dip coating is grabbed by the first robotic arm 32 from the dip coating tank 31 and placed on the conveyor roller 33. The sand mold 102 after dip coating will successively pass through the surface inspection station 341 and the precision inspection station 342. If the surface inspection station 341 detects defects in the sand mold 102, the precision inspection station 342 will not perform precision inspection, and this sand mold 102 will be conveyed to the second robotic arm 35. The automatic control center will send an instruction to the second robotic arm 35 to directly place this sand mold 102 in the unqualified sand mold stacking area 36. If the surface of the sand mold 102 has no defects, the precision inspection station 342 will detect its precision. If the precision does not meet the requirements, the second robotic arm 35 will also place the sand mold 102 in the unqualified sand mold stacking area 36. For the qualified sand mold 102, the second robotic arm 35 will grab it and place it on the tray 37. The vision inspection station 34 will transmit the detected information to the automatic control center. The printed unqualified sand mold 102 will be sent a new instruction by the automatic control center to the sand mold 3D printing device for printing, and the inspection information and printing process information of the qualified sand mold 102 will be automatically saved.

[0059] S4: The transfer device 5 transfers the sand mold 102 with qualified inspection to the drying area 4 for drying, and sends the sand mold 102 with unqualified inspection to the used sand treatment area for used sand regeneration. Specifically, the dried sand mold 102 is conveyed to the drying area by the transfer device 5 and dried in an environment of 110°C - 130°C for 1 - 2 hours.

[0060] S5: The dried sand mold 102 is transferred to the casting workshop by the transfer device 5 for core assembly and pouring.

[0061] In summary, through an automated production line for the entire process of sand mold 3D printing provided by the present invention, the sand mold 3D printing process can be unified, the product quality and production efficiency can be improved, and the labor cost can be reduced.

[0062] In addition, compared with traditional mold core making, this production line has the following advantages: 1. It has a higher flexible production capacity. 3D printing is not limited by the complexity of the model, so this production line can produce any complex sand mold; 2. It shortens the development cycle. The production time of a set of molds is usually about 20 to 25 days. This production line can greatly shorten the product development cycle and improve the development efficiency; 3. It has a high degree of digitization. All equipment of this production line is controlled by an automatic control center, and the production process and inspection data of each product can be traced; 4. Green production. Compared with traditional mold core making, 3D printing sand molds can save printing raw materials. Traditional mold core making requires more equipment, and 3D printing sand molds can also reduce energy consumption.

[0063] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention. Additionally, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0064] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, it should also be regarded as the content disclosed by the present invention.

Claims

1. An automated production line for the entire process of sand mold 3D printing, characterized in that, Including: A sand mold printing area (1), the sand mold printing area (1) includes a plurality of sand mold 3D printing devices (11), the sand mold 3D printing devices (11) include printing work boxes (101), and the sand molds (102) printed by the sand mold 3D printing devices (11) are accommodated in the printing work boxes (101); An auxiliary equipment area (2), the auxiliary equipment area (2) is used to perform heat preservation and curing, core removal, and sand cleaning operations on the sand mold (102) in sequence according to the printing process; A dipping and detection area (3), the dipping and detection area (3) is used to dip the sand mold (102) after removing floating sand with paint and perform detection on it; A drying area (4), the drying area (4) is used to dry the paint on the surface of the sand mold (102) after passing the detection; Transfer devices (5), at least two transfer devices (5) are provided, which are used to transfer the printing work boxes (101) filled with the sand molds (102) between the sand mold printing area (1), the auxiliary equipment area (2), the dipping and detection area (3), and the drying area (4) according to the printing process or transfer the empty printing work boxes (101) into the sand mold 3D printing devices (11); The sand mold printing area (1), the auxiliary equipment area (2), the dipping and detection area (3), the drying area (4), and the transfer devices (5) are connected by network signals.

2. The full-process automated production line for sand mold 3D printing according to claim 1, characterized in that, The auxiliary equipment area (2) includes a heat preservation chamber (21), a core removal chamber (22), and a sand cleaning chamber (23) arranged in sequence along the printing process; The heat preservation chamber (21) is used to perform heat preservation and curing on the sand mold (102); The core removal chamber (22) is used to remove the core of the sand mold (102) after heat preservation and curing and remove the uncured sand; The sand cleaning chamber (23) is used to remove the floating sand on the surface of the sand mold (102) after core removal.

3. The fully automated production line for the entire process of sand mold 3D printing according to claim 2, wherein, The dipping and detection area (3) includes a dipping pool (31), a first robotic arm (32), a conveying roller path (33), a visual inspection station (34), a second robotic arm (35), a non-conforming product stacking area (36), and a tray (37) arranged in sequence along the printing process; The first robotic arm (32) is used to put the sand mold (102) after sand cleaning into the dipping pool (31) for dipping and place the dipped sand mold (102) on the conveying roller path (33); The conveying roller path (33) is used to convey the dipped sand mold (102) to the visual inspection station (34) for qualification detection; The second robotic arm (35) is used to place the sand mold (102) with unqualified detection on the non-conforming product stacking area (36) or place the sand mold (102) with qualified detection on the tray (37).

4. The fully automated production line for the entire process of sand mold 3D printing according to claim 3, characterized in that, The visual inspection station (34) includes a surface inspection station (341) and a precision inspection station (342). The surface inspection station (341) is used to detect whether there are defects on the surface of the dipped sand mold (102), and the precision inspection station (342) is used to perform precision inspection on the sand mold (102) with qualified surface inspection.

5. The fully automated production line for the entire process of sand mold 3D printing according to claim 2, characterized in that, Positioning devices (201) and automatic doors (202) for positioning the printing workbox (101) are provided in the sand mold 3D printing device (11), the heat preservation chamber (21), the core removal chamber (22), the sand cleaning chamber (23), and the drying area (4).

6. The fully automated production line for the entire process of sand mold 3D printing according to claim 2, characterized in that, The drying area (4) includes a surface drying furnace.

7. The fully automated production line for the entire process of sand mold 3D printing according to claim 6, characterized in that, The transfer device (5) is an AGV transfer vehicle.

8. A fully automated production method for sand mold 3D printing, characterized by comprising the following steps: Including the following steps: Obtain the printing conditions of multiple sand mold 3D printing devices (11); According to the printing conditions, control the transfer device (5) to transfer the printing workbox (101) that has completed the printing of the sand mold (102) to the auxiliary equipment area (2) to queue up for heat preservation and curing, core removal, and sand cleaning operations in sequence, and control the other transfer device (5) to transfer the empty printing workbox (101) into the sand mold 3D printing device (11); After sand cleaning is completed, the transfer device (5) transfers the sand mold (102) after sand cleaning to the dip coating and inspection area (3) and performs dip coating and inspection on the sand mold (102) after sand cleaning in sequence; The transfer device (5) transfers the sand mold (102) that has passed the inspection to the drying area (4) for drying, and sends the sand mold (102) that has failed the inspection to the used sand treatment area for used sand regeneration; The dried sand mold (102) is transferred to the foundry workshop for core assembly and pouring through the transfer device (5).

9. The fully automated production method for the entire process of sand mold 3D printing according to claim 8, wherein The temperature for heat preservation and curing is 30°C - 40°C, and the time is 1 - 2 hours.

10. The fully automated production method for the entire process of sand mold 3D printing according to claim 9, wherein, The temperature for drying is 110°C - 130°C, and the time is 1 - 2 hours.

Images