A method for transporting sand cores used in cylinder end cover

Abstract

The present invention discloses a method for handling sand cores for cylinder end covers, including a clamping process, an asbestos pad pasting process and a stacking process; in the clamping process, a sand core handling jig clamps the sand cores transmitted from the production line, and the sand core handling jig can meet the requirements of clamping sand cores of different sizes at the same time; in the asbestos pad pasting process, the sand core handling jig transfers the clamped sand cores to the asbestos pad pasting station, and the sand core handling jig drives the sand cores to flip to a vertical state so that the sand cores can be manually pasted with asbestos pads; in the stacking process, the sand core handling jig transfers the sand cores pasted with asbestos pads to the stacking station for stacking, or to the temporary storage station for temporary storage according to the stacking method. The handling method can realize the automatic clamping, transportation and stacking of the sand cores of the cylinder end covers, improve the work efficiency and reduce the labor cost.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular to a method for transporting sand cores used in cylinder end covers. Background Art

[0002] In the automotive field, most of the cylinder head sand cores are still transported manually, which is inefficient, has high labor costs, and is prone to damage during manual handling. According to process requirements, the sand cores need to be affixed with asbestos pads before stacking. Currently, the sand cores are manually flipped over and then affixed with asbestos pads, which is cumbersome and inefficient.

[0003] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the problems pointed out in the background technology, the present invention proposes a method for transporting sand cores for cylinder end covers, which can realize automatic transport of sand cores for cylinder end covers, improve efficiency and reduce labor costs.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] The present invention provides a method for transporting sand cores for cylinder end covers, which is characterized by comprising:

[0007] The clamping process uses a sand core handling jig to clamp the sand cores transmitted from the production line. The sand core handling jig can meet the requirements of simultaneously clamping sand cores of different sizes;

[0008] In the asbestos pad pasting process, the sand core transport jig transfers the clamped sand core to the asbestos pad pasting station, and the sand core transport jig drives the sand core to flip to a vertical state so as to manually perform the asbestos pad pasting operation on the sand core;

[0009] In the palletizing process, the sand core handling jig transfers the sand cores with asbestos pads to the palletizing station for palletizing, or to the temporary storage station for temporary storage according to the palletizing method.

[0010] In some embodiments of the present application, when the sand cores are stacked, the sand core transport jig drives the sand cores to flip to a horizontal state or a vertical state according to the stacking method.

[0011] In some embodiments of the present application, after the asbestos pad pasting process is completed, a completion signal is manually input into the control system, and the control system controls the robot to perform the palletizing process.

[0012] In some embodiments of the present application, the sand cores transmitted from the production line are in a four-core mode, and each transmitted sand core includes two large sand cores and two small sand cores, and the sand core transport jig clamps four of the sand cores at the same time;

[0013] The stacking method is to stack the large sand cores first and then the small sand cores on the same transfer cart of the stacking station. The sand core handling jig places the small sand cores with asbestos pads on the temporary storage station. After all the large sand cores with asbestos pads are stacked on the transfer cart, the sand core handling jig stacks the small sand cores on the temporary storage station on the same transfer cart.

[0014] In some embodiments of the present application, the sand cores transmitted from the production line are in a four-core mode, and each transmitted sand core includes two large sand cores and two small sand cores, and the sand core transport jig clamps four of the sand cores at the same time;

[0015] The stacking method is that two transfer carts at the stacking station stack the large sand cores and the small sand cores respectively;

[0016] The sand core handling jig stacks the small sand cores with asbestos pads attached to one of the transfer carts, and stacks the large sand cores to another transfer cart.

[0017] In some embodiments of the present application, the sand cores transmitted from the production line are in a two-core mode, and the sand cores transmitted each time have the same size specifications;

[0018] The stacking method is that the sand core transport jig directly stacks the sand cores with asbestos pads attached to them onto the transfer trolley of the stacking station.

[0019] In some embodiments of the present application, the palletizing station is provided with a magnetic positioning device for adsorbing the transfer cart, and the magnetic positioning device feeds back the arrival signal of the transfer cart to the control system. When a vacant position appears on the palletizing station, the control system issues an instruction to replenish the transfer cart.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are:

[0021] The sand core handling method disclosed in the present application realizes that after the sand core is formed from the molding machine, the sand core is clamped and transferred between different workstations through a robot and a specially designed sand core handling jig, and the asbestos pad and stacking operations are completed. Finally, the transfer cart with the stacked sand core is transported to the packaging area, which is convenient for the operator to pack and transport. The handling method realizes the automatic clamping, transportation and stacking of the sand core, improves work efficiency and reduces labor costs.

[0022] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 is a schematic structural diagram of a sand core transport jig before flipping according to an embodiment;

[0025] Figure 2 for Figure 1 The structure shown is a schematic diagram of the structure observed from the Q direction;

[0026] Figure 3 for Figure 2 The structure shown is a schematic diagram of the structure after omitting the large sand core and the small sand core;

[0027] Figure 4 is a schematic structural diagram of a sand core transport jig after flipping according to an embodiment;

[0028] Figure 5 is a schematic structural diagram of a small sand core according to an embodiment;

[0029] Figure 6 is a schematic structural diagram of a large sand core according to an embodiment;

[0030] Figure 7 is a structural schematic diagram of a sand core handling system according to an embodiment;

[0031] Figure 8 4 is a flow chart of a sand core transporting method according to an embodiment.

[0032] Reference numerals:

[0033] 100-rack;

[0034] 200-frame, 210-second driving unit, 220-through port;

[0035] 300-sand core clamping device, 310-clamping arm, 320-profile clamping claw, 330-first driving unit;

[0036] 400-supporting part, 410-supporting plate, 420-elastic guide rod;

[0037] 500- fence, 510- first opening, 520- second opening;

[0038] 600 - Robot;

[0039] 710-operation cabinet, 720-control cabinet;

[0040] 810-gripping station, 820-asbestos padding station, 830-palletizing station, 831-guide rail, 832-transfer trolley, 833-magnetic positioning structure, 840-temporary storage station;

[0041] 1-Small sand core, 2-Large sand core. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0048] The present invention proposes a method for transporting sand cores used in cylinder end covers, referring to Figure 8 , which includes:

[0049] The clamping process uses the sand core handling jig installed on the robot to clamp the sand cores transmitted from the production line. The sand core handling jig can meet the requirements of simultaneous clamping of sand cores of different sizes;

[0050] In the asbestos pad pasting process, the robot drives the sand core handling jig to transfer the clamped sand core to the asbestos pad pasting station, and the sand core handling jig drives the sand core to flip to a vertical state so that the asbestos pad pasting operation can be performed manually.

[0051] In the palletizing process, the robot drives the sand core transport jig to transfer the sand cores with asbestos pads to the palletizing station for palletizing, or to the temporary storage station for temporary storage, depending on the palletizing method.

[0052] After the sand core is formed, it is transported to the clamping station. After the forming signal is transmitted to the robot control system, the robot moves to the specified position under the control of the system, and the handling jig rotates to the specified posture to clamp the sand core. After the clamping is completed, the robot drives the handling jig to the asbestos pad pasting station, and the asbestos pad pasting operation is performed manually. After completion, the manual presses the completion command, and the robot transfers the sand core to the stacking station and executes the stacking command. After the sand core transfer cart is fully loaded, the material detection system issues a completion command, and prompts the manual to take away the fully loaded sand core transfer cart through the alarm, and then pushes in an empty cart again. The robot continues to stack the sand core transfer cart at another station, and the manual continues to place the empty cart in the vacant station. After the empty cart is in place, it will give the robot an arrival signal, and then continue to repeat the above operations.

[0053] In some embodiments of the present application, when the sand cores are stacked, according to the requirements of the stacking method, the sand core handling jig drives the sand cores to flip to a horizontal state or a vertical state to achieve automatic stacking without manual intervention.

[0054] In some embodiments of the present application, after the asbestos pad pasting process is completed, a completion signal is manually input into the control system, and the control system controls the robot to perform the palletizing process.

[0055] A manual confirmation process is added here to check and confirm the sticking condition of the asbestos pad.

[0056] According to the different production schedules of customers, the sand cores transmitted from some production lines are four-core models, which include two large sand cores and two small sand cores. Figure 6 As shown, the small sand core 1 is Figure 5 As shown; the sand cores transmitted by some production lines are in a two-core mode, including two sand cores of the same size and specification.

[0057] In the four-core mode, the sand core handling jig can clamp four sand cores at the same time; in the two-core mode, the sand core handling jig can clamp two sand cores at the same time.

[0058] Different production scheduling modes correspond to different palletizing methods.

[0059] The four-core mode has two stacking methods. The first is to stack the large sand cores first and then the small sand cores on the same transfer cart of the stacking station. Specifically, the sand core handling jig clamps four sand cores from the clamping station at the same time and transfers them to the asbestos pad pasting station. The sand core handling jig drives the sand core to flip to a vertical state to facilitate manual asbestos pad pasting operations at this station. Then the sand core handling jig places the small sand core at the temporary storage station, and then transfers the large sand core to the transfer cart of the stacking station. The large sand core can be flipped to a vertical state or a horizontal state according to the stacking requirements during stacking. Finally, the sand core handling jig stacks the small sand cores on the temporary storage station onto the same transfer cart of the stacking station.

[0060] The second stacking method of the four-core mode is to place two transfer carts on the stacking station, one transfer cart is used to stack large sand cores, and the other transfer cart is used to stack small sand cores. The sand core handling jig clamps the four sand cores from the clamping station at the same time and transfers them to the asbestos pad pasting station. The small sand cores with asbestos pads are stacked on one of the transfer carts, and the large sand cores are stacked on the other transfer cart until the transfer cart is fully loaded.

[0061] The stacking method of the two-core mode is that the sand core handling jig clamps the two sand cores on the clamping station at the same time and transfers them to the asbestos pad pasting station, and then the sand core handling jig stacks the sand cores with asbestos pads directly onto the transfer trolley of the stacking station.

[0062] In some embodiments of the present application, refer to Figure 7 The palletizing station is provided with a magnetic positioning structure 833 for adsorbing the transfer trolley 823. The magnetic positioning structure 833 feeds back the arrival signal of the transfer trolley 823 to the control system. When a vacant position appears on the palletizing station, the control system issues a command to replenish the transfer trolley to achieve continuous palletizing.

[0063] The present invention also provides a transport system for implementing the above-mentioned sand core transport method, specifically referring to Figure 7 , which includes a robot 600, a clamping station 810, an asbestos pad pasting station 820 and a palletizing station 830, etc.

[0064] The robot arm of the robot 600 is provided with a sand core transport jig, and the sand core is clamped by the sand core transport jig.

[0065] A workbench is provided on the clamping station 810 for placing the sand cores to be clamped and transported. The sand cores on the clamping station 810 are transferred from the production line.

[0066] The asbestos pad pasting station 820 is mainly used for manually pasting asbestos pads on the sand cores clamped by the handling jig at this position.

[0067] A transfer trolley 832 is provided on the stacking station 830, and the sand cores with the asbestos pads are further transferred by the transport jig to the transport trolley 832 for stacking.

[0068] The sand core transport jig is rotated in the horizontal circumferential direction by the robot arm of the robot 600 , so that the sand core is transferred between the clamping station 810 , the asbestos pad pasting station 820 and the stacking station 830 .

[0069] The sand core handling system realizes the clamping of sand cores and the transfer between different workstations through robots and specially designed sand core handling jigs after the sand cores are formed in the forming machine, completes the asbestos pad pasting and stacking operations, and finally transports the transfer cart with the stacked sand cores to the packaging area, which is convenient for operators to pack and transport.

[0070] The handling system realizes the automatic clamping, transfer and stacking of sand cores, improves work efficiency and reduces labor costs.

[0071] In some embodiments of the present application, the position lines of the clamping station 810, the asbestos pad pasting station 820 and the stacking station 830 form a triangular structure, and the robot 600 is located in the area surrounded by the clamping station 810, the asbestos pad pasting station 820 and the stacking station 830, and the asbestos pad pasting station 820 is opposite to the stacking station 830. In this way, the overall structural layout is more compact, which facilitates the transfer of sand cores between different stations with the shortest distance.

[0072] The handling system also includes a temporary storage station 840, which is used to place sand cores that have been affixed with asbestos pads but are not yet stacked. The temporary storage station 840 is mainly set up to adapt to different stacking methods. In some embodiments of the present application, the handling system also includes a fence 500, and the fence 500 encloses a working area. The fence 500 is provided with a first opening 510 and a second opening 520. The first opening 510 is opposite to the asbestos pad affixing station 820, which is convenient for manual affixing of asbestos pads to the sand cores here. The second opening 520 is opposite to the stacking station 830, and the transfer cart 832 moves in / out of the stacking station 830 through the second opening 520.

[0073] Safety light curtains (not shown) are respectively disposed at the first opening 510 and the second opening 520 to improve safety.

[0074] A safety entrance and exit (not shown) is provided on one side of the fence 500 to facilitate entry and exit of personnel.

[0075] An operation cabinet 710 is provided outside the fence 500 near the asbestos pad pasting station 820 . The operator issues instructions to the transport system through the operation cabinet 710 outside the fence 500 , thereby improving the safety of the operator.

[0076] A control cabinet 720 is provided at a corner position inside the fence 500, which communicates with the operation cabinet 710. The control cabinet 720 is the brain of the entire handling system.

[0077] In some embodiments of the present application, a guide rail 831 is provided on the palletizing station 830, and a transfer cart 832 is provided on the guide rail 831. The wheels at the bottom of the transfer cart 832 are slidably arranged in the guide rail 831, and the sand cores are stacked on the transfer cart 832. The transfer cart 832 moves in / out of the palletizing station 830 along the guide rail 831.

[0078] The stacking station 830 is also provided with a magnetic positioning structure 833 for adsorbing the transfer cart 832 to prevent the transfer cart 832 from shifting during the stacking operation.

[0079] For the specific structure of the sand core handling jig in some embodiments of the present application, refer to Figures 1 to 4 ,in Figures 1 to 3 This is a schematic diagram of the structure before the jig is turned over. Figure 4 This is a schematic diagram of the structure after the jig is turned over.

[0080] The transport jig includes a frame 100 and a sand core clamping device 300 .

[0081] A flippable frame 200 is disposed on the rack 100 , and the frame 200 has a horizontal state before flipping and a vertical state after flipping.

[0082] The sand core clamping device 300 is disposed on the frame 200 , and the sand core clamping device 300 is turned synchronously with the frame 200 to make the clamped sand core in a horizontal state or a vertical state.

[0083] The sand core clamping device 300 includes two relatively movable profiling jaws 320 , and the profiling jaws 320 are used to clamp the two ends of the sand core so as to clamp and transport the sand core.

[0084] When the two profiling jaws 320 move toward each other, the sand core is clamped to facilitate the transportation of the sand core between different workstations; when the two profiling jaws 320 move away from each other, the sand core is released to complete the stacking.

[0085] The sand cores transferred from the production line are stacked at the clamping station 810, and the sand core clamping device 300 is in Figures 1 to 3 The horizontal state shown in FIG. 8 is used to clamp the sand core at the clamping station 810, and then the frame 200 is turned over to drive the entire sand core clamping device 300 to turn over to Figure 4 The frame 200 is in the vertical state shown, and the sand core clamping device is shifted to the asbestos pad pasting station 820, so as to facilitate manual operation of directly pasting asbestos pads on the sand cores. The sand core clamping device 300 then transfers the sand cores pasted with asbestos pads to the stacking station 830. According to the requirements of the stacking method, the frame 200 can be flipped to a horizontal state to stack the sand cores horizontally, or not flipped to stack the sand cores vertically.

[0086] The handling jig realizes the clamping of the sand core and the transfer between different workstations through the sand core clamping device 300. At the same time, the flipping of the sand core clamping device 300 is driven by the flipping of the frame 200 to realize the flipping of the sand core, so as to facilitate the operation of attaching the asbestos pad and meet the needs of different stacking methods.

[0087] In some embodiments of the present application, at least two sets of sand core clamping devices 300 are provided, so that multiple sand cores can be clamped and transported at the same time, further improving efficiency.

[0088] Furthermore, each set of sand core clamping device 300 can clamp sand cores of different sizes, thereby improving the applicability of the device. Taking the four-core mode mentioned above as an example, two sets of sand core clamping devices 300 can be provided on each frame 200, which can clamp a large sand core 2 and a small sand core 1 at the same time, thereby improving work efficiency.

[0089] Furthermore, two relatively arranged frames 200 are provided on the frame 100, and the flipping directions of the two frames 200 are opposite. In this way, four sets of sand core clamping devices 300 are simultaneously provided on the two frames 200, and the two large sand cores 2 and the two small sand cores 1 can be clamped at the same time, thereby further improving the work efficiency.

[0090] Regarding the specific structure of the sand core clamping device 300, in some embodiments of the present application, the sand core clamping device 300 includes a clamping arm 310 and a first driving part 330, one end of the clamping arm 310 is connected to the first driving part 330, and the other end of the clamping arm 310 is provided with a contoured clamping claw 320, the first driving part 330 is arranged on the frame 200, and the first driving part 310 can be pneumatically driven.

[0091] The first driving part 330 drives each clamping arm 310 to move, so that the two clamping arms 310 arranged opposite to each other move toward or away from each other, so as to clamp or release the sand core.

[0092] The frame 200 is provided with a through hole 220 for the clamp arm 310 to extend out, and the through hole 220 can allow the clamp arm 310 to move horizontally. The contoured clamping jaw 320 and the first driving part 330 are located on different sides of the frame 200 to avoid the first driving part 330 interfering with the sand core.

[0093] Regarding the flipping structure of the frame 200 , in some embodiments of the present application, a second driving unit 210 for driving the frame 200 to flip is provided on the frame 100 .

[0094] The second driving unit 210 includes a servo motor and a planetary reducer, which are used in combination to provide a continuous source of power for the sand core clamping device 300 while ensuring its turning accuracy, thereby improving the operating reliability and stability of the equipment.

[0095] In some embodiments of the present application, the sand core transport jig also includes a support portion 400, which includes a support plate 410 and an elastic guide rod 420. The support plate 410 is disposed at one end of the elastic guide rod 420. A through hole (not marked) is provided on the frame 200, and the elastic guide rod 420 is movably inserted into the through hole. The support plate 410 is used to support the sand core during the sand core transportation process.

[0096] The sand core is held in place by the profiling jaws 320 and supported by the support portion 400 , thereby achieving stability during transportation.

[0097] In some embodiments of the present application, an anti-wear portion (not shown) is provided on the contoured clamping jaw 320 to increase the service life, and the hardness of the anti-wear portion is lower than the hardness of the sand core, thereby protecting the sand core.

[0098] In some embodiments of the present application, the frame 200 is made of aluminum alloy, which further reduces the overall weight of the tool while meeting the strength requirement.

[0099] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0100] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for transporting sand cores for cylinder end covers, characterized in that: include: The clamping process uses a sand core handling jig to clamp the sand cores transmitted from the production line. The sand core handling jig can meet the requirements of simultaneously clamping sand cores of different sizes; In the asbestos pad pasting process, the sand core transport jig transfers the clamped sand core to the asbestos pad pasting station, and the sand core transport jig drives the sand core to flip to a vertical state so as to manually perform the asbestos pad pasting operation on the sand core; In the palletizing process, the sand core handling jig transfers the sand core with the asbestos pad attached to the palletizing station for palletizing, or transfers it to the temporary storage station for temporary storage according to the palletizing method; After the sand core is formed, it is transported to the clamping station. After the forming signal is transmitted to the robot control system, the robot moves to the specified position under the control of the system, and the transport jig rotates to the specified posture to clamp the sand core. After the clamping is completed, the robot drives the transport jig to the asbestos pad pasting station, and the asbestos pad pasting operation is performed manually. After completion, the completion command is manually pressed, and the robot transports the sand core to the stacking station to execute the stacking command; The position connection line of the clamping station, the asbestos pad sticking station and the palletizing station forms a triangle structure, the robot is located in the area surrounded by the clamping station, the asbestos pad sticking station and the palletizing station, and the asbestos pad sticking station is opposite to the palletizing station; The handling jig includes a frame and a sand core clamping device, the frame is provided with a flippable frame, the frame has a horizontal state before flipping and a vertical state after flipping, the sand core clamping device is provided on the frame, and the sand core clamping device flips synchronously with the frame; The sand cores transmitted from the production line are stacked at the clamping station, and the sand core clamping device is in a horizontal state to clamp the sand cores at the clamping station, and then the frame is flipped to drive the sand core clamping device to flip to a vertical state, and at the same time, the sand core clamping device is shifted to the asbestos pad pasting station, and the sand core clamping device then transfers the sand cores with asbestos pads pasted to the stacking station. According to the requirements of the stacking method, the frame can be flipped to a horizontal state to stack the sand cores horizontally, or not flipped to stack the sand cores vertically.

2. The method for transporting sand cores for cylinder end covers according to claim 1, characterized in that: When the sand cores are stacked, the sand core transport jig drives the sand cores to flip to a horizontal state or a vertical state according to the stacking method.

3. The method for transporting sand cores for cylinder end covers according to claim 1, characterized in that: After the asbestos pad pasting process is completed, a completion signal is manually input into the control system, and the control system controls the robot to perform the palletizing process.

4. The method for transporting sand cores for cylinder end covers according to claim 1, characterized in that: The sand cores transmitted from the production line are in a four-core mode, and each transmitted sand core includes two large sand cores and two small sand cores, and the sand core transport jig clamps four of the sand cores at the same time; The stacking method is to stack the large sand cores first and then the small sand cores on the same transfer cart of the stacking station. The sand core handling jig places the small sand cores with asbestos pads on the temporary storage station. After all the large sand cores with asbestos pads are stacked on the transfer cart, the sand core handling jig stacks the small sand cores on the temporary storage station on the same transfer cart.

5. The method for transporting sand cores for cylinder end covers according to claim 1, characterized in that: The sand cores transmitted from the production line are in a four-core mode, and each transmitted sand core includes two large sand cores and two small sand cores, and the sand core transport jig clamps four of the sand cores at the same time; The stacking method is that two transfer carts at the stacking station stack the large sand cores and the small sand cores respectively; The sand core handling jig stacks the small sand cores with asbestos pads attached to one of the transfer carts, and stacks the large sand cores to another transfer cart.

6. The method for transporting sand cores for cylinder end covers according to claim 1, characterized in that: The sand cores transmitted from the production line are in two-core mode, and the sand cores transmitted each time have the same size specifications; The stacking method is that the sand core transport jig directly stacks the sand cores with asbestos pads attached to them onto the transfer trolley of the stacking station.

7. The method for transporting sand cores for cylinder end covers according to any one of claims 4 to 6, characterized in that: The stacking station is provided with a magnetic positioning device for adsorbing the transfer trolley. The magnetic positioning device feeds back the arrival signal of the transfer trolley to the control system. When a vacant position appears on the stacking station, the control system issues an instruction to replenish the transfer trolley.

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