Sand mold casting finished product demolding treatment process and demolding treatment device

Abstract

The invention belongs to the technical field of casting demolding of metal casting, and particularly relates to a finished product demolding treatment process and demolding treatment device for sand casting, castings are treated on all stations according to the sequence of sand mold loosening, large sand and casting separation, vibration and breaking treatment, demolding treatment of finished casting products on a whole conveying device is achieved, and the production efficiency is improved. According to the device, the insert is used for loosening a sand mold, the separating device is used for separating large sand from the casting, the vibrating machine is used for separating the remaining sand from the casting, and the breaking device is used for breaking the top riser and the top exhaust column.

Description

Technical Field

[0001] The present application belongs to the technical field of demoulding of castings in metal casting, and in particular relates to a demoulding process and a demoulding device for a finished product of sand casting. Background Art

[0002] In sand casting, demoulding is an important part of sand casting. At present, the common demoulding solutions for sand casting are: After the sand and the casting are separated, the casting sand mold is lifted by the inclined conveyor belt, and the casting sand mold is dropped onto the chain plate conveyor belt by utilizing the height difference. The sand and the casting are broken by utilizing the gravity of the casting sand mold, and the sand on the surface of the casting is vibrated down by a vibrator, and then conveyed to the next station to remove the top riser and top exhaust column on the surface of the casting.

[0003] The above scheme has the following problems: During the rupture stage of castings and sand, the chain conveyor belt is a metal structure. During the rupture stage, the sand plays a buffering role. However, if the casting is heavy or has a complex shape, the casting may be subjected to a large impact force during the falling and rupture process, which may easily cause damage or deformation of the casting surface.

[0004] A large amount of sand falls on the chain conveyor belt, resulting in a lot of dust.

[0005] The connection between sand and casting is relatively tight, and sand and casting fall onto the chain conveyor belt as a whole. A large amount of sand remains on the casting. After the casting enters the vibrating machine, a large amount of sand also enters the vibrating machine, causing the vibrating machine to run longer and generate more dust.

[0006] In the process of removing the top riser and the top vent column, a hammering scheme is usually adopted. The hammering scheme causes the top riser and the top vent column to fly around, which has a high risk factor. If the impact force of the hammer is large, it may cause cracks, dents or deformation on the surface of the casting, affecting the shape of the casting. Summary of the invention

[0007] In order to solve the above problems, the present application provides a finished product demoulding process and a demoulding device for sand casting.

[0008] The first purpose of the present application is to provide a demolding process for finished products of sand casting. At each workstation, the casting is processed in the order of "loosening the sand mold - separating large pieces of sand from the casting - vibrating - breaking processing", so as to realize the demolding of the finished castings on the entire conveying device.

[0009] In order to achieve the first purpose of this application, the technical solution of this application is: A finished product demoulding process of sand casting comprises the following steps: S1, transportation and positioning: moving the casting sand mold to be demoulded to the first station; S2, loosening the sand mold: at the first station, insert the plug into the casting sand mold to form a plug hole, and move the casting sand mold to the second station; S3, separation of large sand and casting: in the second station, the large sand is separated from the casting, and the casting and the remaining sand are moved to the third station; S4, vibration: At the third station, the sand on the surface of the casting is vibrated off and the casting is moved to the fourth station; S5. Breaking off the top riser and the top exhaust column: At the fourth station, breaking off the top riser and the top exhaust column.

[0010] Furthermore, in step S2, a hydraulic cylinder is used to drive a plurality of plug-ins to move, so that the plug-ins are inserted into the casting sand mold, and the plug-ins are inserted into the casting sand mold multiple times in a staggered manner.

[0011] Furthermore, in step S3, the separation device is inserted into the casting sand mold along the insertion hole, and the large pieces of sand are pried off by using the prying plate of the separation device.

[0012] Furthermore, in step S5, the upper clamp body is used to clamp the upper and middle ends of the top riser or the top exhaust column, and the lower block body is used to support the lower end of the top riser or the top exhaust column. The upper clamp body and the lower block body move in opposite directions, so that the top riser or the top exhaust column is broken.

[0013] The second purpose of the present application is to provide a finished product demolding processing device for sand casting, which uses a plug-in to loosen the sand mold, uses a separation device to separate large pieces of sand from the casting, uses a vibrator to separate the remaining sand from the casting, and uses a breaking device to break the top riser and the top exhaust column.

[0014] To achieve the second purpose of this application, the technical solution of this application is: A finished product demoulding processing device for sand casting comprises an insert arranged at a first station, a separation device arranged at a second station, a vibrator arranged at a third station and a breaking device arranged at a fourth station, wherein a conveying device moves the casting and sand from the first station to the fourth station according to the station sequence.

[0015] Furthermore, the plug-in unit comprises a sleeve rod and an insertion rod, one end of the insertion rod protrudes from the sleeve rod, and the other end of the insertion rod is arranged inside the sleeve rod, and a compression spring inside the sleeve rod pushes the insertion rod out of the sleeve rod.

[0016] Furthermore, the separation device includes a shell, a contact is provided at the front end of the shell, two movable plates are provided at the rear end of the shell, the two movable plates are hingedly matched, and each movable plate is staggered with a pry plate to form two groups of movable plates and pry plates in an "X" structure. A two-way drive cylinder is provided between the movable plates, and both ends of the two-way drive cylinder are respectively hingedly connected to the movable plates. A fixed plate is provided on the shell, and a fixed rod is provided on the fixed plate.

[0017] Furthermore, a moving rod is provided at the rear end of the contact, a buffer spring is provided at the outer periphery of the moving rod, a first contact block and a second contact block are provided in a separated arrangement in the shell, the first contact block is connected to the indicator light through a wire, the second contact block is connected to the indicator light through a wire, and the rear end of the moving rod is a conductive block connecting the first contact block and the second contact block.

[0018] Furthermore, a rotating wheel is arranged in the shell, an arc rod is arranged on the rotating wheel, a gradual spring is arranged on the outer periphery of the arc rod, and the rotating wheel is connected to the pry plate through a connecting rope. When the pry plate is separated from the shell, the connecting rope drives the rotating wheel to rotate so that the gradual spring is compressed.

[0019] Furthermore, the breaking device includes a hydraulic cylinder, a lower block is arranged on the output shaft of the hydraulic cylinder, two upper pliers are arranged on the upper side of the lower block, a connecting block is arranged at the front end of the hydraulic cylinder, a matching plate is arranged at the rear end of the hydraulic cylinder, push-pull rods are movably arranged on the connecting plate and the matching plate, the front end of the push-pull rod is connected to the upper pliers through a crank-connecting rod structure, the push-pull rod drives the two upper pliers to separate or close, and a jaw is arranged on the upper pliers, and a clamping plate is arranged in the jaw.

[0020] Furthermore, a compression spring is provided at the rear end of the clamping plate, and a double-end metal touch plate is provided on the clamping plate. The double-end metal touch plate has two metal touch plates. A metal plate is provided in the upper clamp body. The metal plate is divided into multiple metal partitions by an insulating plate. Each metal partition is connected to the indicating device through a wire. When the double-end metal touch plate contacts different metal partitions, the indicating device is triggered.

[0021] Compared with the prior art, the beneficial effects of this application are: During the demolding stage of the casting, the present application processes the casting in the order of "loosening the sand mold - separating large pieces of sand from the casting - vibrating - breaking off", loosening the sand mold to initially separate the casting from the sand, peeling off large pieces of sand around the casting from around the casting to avoid an excessive amount of sand entering the vibration stage, vibrating the sand on the surface of the casting during the vibration stage, and breaking off the top riser and top exhaust column of the casting at the next station to complete the demolding of the casting on the entire production line.

[0022] In the sand mold loosening stage, the present application utilizes the plug-in to loosen the sand mold, so that a number of gaps are generated in the sand mold, and the plug-in is prevented from excessively pressing the casting, thereby preventing the casting from breaking.

[0023] The separation device of the present application can be inserted into the sand mold along the gap left by the plug-in, and the large pieces of sand around the casting can be pried off by using a pry plate. The separation device is provided with contacts, which are linked to indicator lights to avoid excessive contact between the separation device and the casting. The pry plate is connected to a spring to avoid sudden movement of the pry plate and a large collision with the casting.

[0024] The breaking device of the present application utilizes two upper clamps to clamp the middle and upper ends of the top riser and the top exhaust column, utilizes the lower block to support the lower ends of the top riser and the top exhaust column, uses the lower block as a fulcrum, and utilizes the upper clamps to break the top riser and the top exhaust column. In addition, the upper clamps and the lower block can also move in opposite directions at the same time, so that the top riser or the top exhaust column can be broken more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0026] Figure 1 This is the process flow chart of this application; Figure 2 The casting sand mold of this application; Figure 3 This is a schematic diagram of the overall structure of the plug-in of this application; Figure 4 This is a schematic diagram of the overall structure of an embodiment of the separation device of the present application; Figure 5 It is a schematic diagram of the overall structure of another embodiment of the separation device of the present application; Figure 6 This is a schematic diagram of the internal structure of the shell of the separation device of the present application; Figure 7 for Figure 6 Schematic diagram of an enlarged view of region A; Figure 8 for Figure 6 Schematic diagram of an enlarged view of region B; Fig. 9 It is a schematic diagram of the overall structure of an implementation scheme of the breaking device of the present application; Fig.10 It is a schematic diagram of the overall structure of another embodiment of the breaking device of the present application; Fig.11 This is a schematic diagram of the internal structure of the upper clamp body of the present application; Fig.12 for Fig.11 Schematic diagram of an enlarged view of the C area.

[0027] In the figure: 1. Casting sand mold, 2. Insert rod, 3. Sleeve rod, 4. Compression spring, 5. Housing, 6. Contact, 7. Pry plate, 8. Movable plate, 9. Bidirectional drive cylinder; 10. fixing plate, 11. fixing rod, 12. supporting plate, 13. supporting rod, 14. connecting plate, 15. buffer spring, 16. first contact block, 17. second contact block, 18. indicator light, 19. rotating wheel; 20. arc rod, 21. hydraulic cylinder, 22. lower block, 23. connecting block, 24. matching plate, 25. push-pull rod, 26. upper clamp body, 27. return spring, 28. clamping plate, 29. metal plate, 30. double-ended metal touch plate. DETAILED DESCRIPTION

[0028] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] In the present application, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present application, and do not specifically refer to any part or element in the present application and should not be understood as limitations on the present application. Example 1

[0031] This embodiment is a finished product demoulding process of sand casting, comprising the following steps: S1, transport positioning: moving the casting sand mold 1 to be demoulded to the first station; S2, loosening the sand mold: at the first station, insert the plug into the casting sand mold 1 to form a plug hole, and move the casting sand mold 1 to the second station; S3, separation of large sand and casting: in the second station, the large sand is separated from the casting, and the casting and the remaining sand are moved to the third station; S4, vibration: At the third station, the sand on the surface of the casting is vibrated off and the casting is moved to the fourth station; S5. Breaking off the top riser and the top exhaust column: At the fourth station, breaking off the top riser and the top exhaust column.

[0032] In this embodiment, different tasks are completed at different workstations. At each workstation, the casting is processed in the order of "loosening the sand mold - separating large pieces of sand from the casting - vibration - breaking processing". Especially in the process of processing sand, it is divided into two steps. The first step is to separate the large sand on the periphery of the casting to reduce the amount of sand entering the vibrator. The second step is to use the vibrator to remove the residual sand on the surface of the casting so that the sand is completely separated from the casting. The sand mold 1 of the casting to be demolded has the frame used for casting on the surface removed before the first workstation. In addition, the sand mold 1 of the casting to be demolded can include two states. The first is that the sand completely covers the casting. In this embodiment, the upper and lower layers of sand are removed. The other is that the upper layer of sand has been removed from the periphery of the casting before the first workstation or the second workstation. In this embodiment, the lower layer of sand is removed from the periphery of the casting.

[0033] The first workstation, the second workstation, the third workstation and the fourth workstation of this embodiment are arranged on a whole U-shaped production line.

[0034] As a specific implementation plan, in the front station of the first station and the first station and the second station, this embodiment uses a mobile vehicle to transfer the casting sand mold 1 to be demolded among the various stations. When the mobile vehicle moves to the first station, the mobile vehicle is positioned and locked by relying on the positioning device and the locking device. For example, the positioning device can adopt limit sensors, contact switches and other applicable sensors and other structures. The locking device can be installed on the wheels of the mobile vehicle, such as a brake device. For another example, the locking device can also adopt a baffle or block driven by a driving device to block and limit the mobile vehicle to achieve the locking of the mobile vehicle.

[0035] As a specific implementation scheme, in step S2, a hydraulic cylinder 21 is used to drive a plurality of plug-ins to move, so that the plug-ins are inserted into the casting sand mold 1, and the plug-ins are inserted into the casting sand mold 1 multiple times with a misaligned state. Specifically, after the plug-in is inserted into the sand for the first time and pulled out, the position of the hydraulic cylinder 21 is slightly moved or the position of the moving vehicle is slightly moved, so that the plug-in is inserted into the sand for the second time, and the process is repeated multiple times. After multiple insertions, the sand is loosened. When inserting, a combination of vertical insertion and inclined insertion is used.

[0036] As a specific implementation scheme, in step S3, the separation device is inserted into the casting sand mold 1 along the insertion hole, and the large pieces of sand are pried off using the prying plate 7 of the separation device, so that a large amount of sand on the periphery of the casting falls down and falls onto the sand conveyor belt below.

[0037] As a specific implementation scheme, in step S4, the sand on the surface of the casting is vibrated off by using an existing vibrating machine.

[0038] As a specific implementation scheme, in step S5, the upper clamp body 26 is used to clamp the upper and middle end of the top riser or the top exhaust column, and the lower block body 22 is used to support the lower end of the top riser or the top exhaust column. The upper clamp body 26 and the lower block body 22 move in opposite directions to break the top riser or the top exhaust column. In this embodiment, the breaking scheme is used to replace the current hammering scheme. Example 2

[0039] The present embodiment is a finished product demoulding processing device for sand casting, including an insert arranged at a first station, a separation device arranged at a second station, a vibrator arranged at a third station and a breaking device arranged at a fourth station. The conveying device moves the casting and sand from the first station to the fourth station according to the order of the stations. At the first station, the sand mold is loosened to provide a basis for inserting the separation device into the sand mold in the second station. At the second station, the separation device is inserted into the sand mold, and the separation device is used to separate large pieces of sand from the casting to avoid too much sand entering the vibrator. In the third station, the vibrator is used to vibrate the sand on the surface of the casting. At the fourth station, the top riser and the top exhaust column of the casting that has been demoulded are broken off.

[0040] The plug-in is arranged at the first station, such as Figure 3 As shown, the plug-in of this embodiment includes a sleeve rod 3 and an insertion rod 2, one end of the insertion rod 2 protrudes from the sleeve rod 3, and the other end of the insertion rod 2 is arranged in the sleeve rod 3. The compression spring 4 in the sleeve rod 3 pushes the insertion rod 2 out of the sleeve rod 3. Since the plug-in is inserted into the sand mold relatively randomly, but there is still a casting in the sand mold, in order to avoid the rigid contact between the metal plug-in and the casting, causing the surface of the casting or the thin-walled section of the casting to rupture, in this embodiment, due to the use of the compression spring 4, when the insertion rod 2 contacts the casting, the compression spring 4 is compressed, so that the contact between the insertion rod 2 and the casting is buffered. In addition, the front section of the insertion rod 2 gradually becomes thinner, which is convenient for the insertion of the insertion rod 2 into the sand mold, and the head end of the insertion rod 2 is a round head.

[0041] As a more specific implementation scheme, the upper end of the sleeve rod 3 of this embodiment has a threaded rod, and a fixing plate 10 is installed on the output shaft of the hydraulic cylinder 21. The threaded rod is threadedly connected to the fixing plate 10, so that the plug-in is fixed on the fixing plate 10 and driven by the hydraulic cylinder 21.

[0042] As a more specific implementation scheme, the separation device is inserted into the sand mold to separate large pieces of sand from the casting. The separation device includes a shell 5, which is convenient for inserting the shell 5 into the sand mold. Two movable plates 8 are installed at the rear end of the shell 5. The two movable plates 8 are hinged, that is, the two movable plates 8 are connected together by a hinge axis, so that the movable plates 8 can rotate around the hinge axis. A pry plate 7 is staggered on each movable plate 8 to form two groups of movable plates 8 and pry plates 7 in an "X" structure, that is, the movable plate 8 on the left is connected to the pry plate 7 on the right, and the movable plate 8 on the right is connected to the pry plate 7 on the left. When the movable plate 8 moves, the pry plate 7 moves, and the pry plate 7 is separated from the shell 5. The large pieces of sand are peeled off by the pry plate 7. From back to front, the middle end and front end of the shell 5 and the pry plate 7 gradually become thinner. As a power device, a two-way driving cylinder 9 is installed between the movable plates 8, and a hinge seat is installed on the movable plate 8. The two ends of the two-way driving cylinder 9 are respectively hingedly connected to the movable plates 8.

[0043] A fixing plate 10 is mounted on the housing 5 , a fixing rod 11 is mounted on the fixing plate 10 , a supporting plate 12 is mounted on the fixing rod 11 , and the bidirectional driving cylinder 9 is fixed on the supporting plate 12 .

[0044] As an implementation scheme, Figure 4 As shown, in this embodiment, a support rod 13 is installed on the fixed rod 11, and the support rod 13 is installed on the second workstation. The support rod 13 serves as a support member for the entire separation device, and the separation device is moved with the end of the support rod 13 as a supporting point. Correspondingly, a handle is installed at the end of the fixed rod 11, and the separation device is used to peel off large pieces of sand by manual means.

[0045] As another embodiment, Figure 5 As shown, in this embodiment, a connecting plate 14 is installed at the end of the fixing rod 11, and the connecting plate 14 is used to connect with a lifting power device such as a cylinder or an electric cylinder, so that the separation device is inserted into the sand mold in an automated manner.

[0046] like Figure 6 , Figure 7As shown, the front end of the housing 5 is installed with a contact 6, specifically, the rear end of the contact 6 is installed with a moving rod, the moving rod is inserted into the housing 5, the housing 5 has a nylon seat inside, the moving rod passes through the nylon seat, a buffer spring 15 is installed on the outer periphery of the moving rod, the housing 5 has a partition plate, the partition plate is used as a bottom plate, the buffer spring 15 is installed on the partition plate, the partition plate has a through hole, the buffer spring 15 is compressed, the moving rod passes through the through hole on the partition plate, the housing 5 is installed with a first contact block 16 and a second contact block 17 arranged separately, the first contact block 16 and the second contact block 17 are both insulated from the housing 5 The first contact block 16 is connected to the indicator light 18 through a wire, and the second contact block 17 is connected to the indicator light 18 through a wire. The rear end of the moving rod is a conductive block connecting the first contact block 16 and the second contact block 17. When the moving rod contacts the first contact block 16 and the second contact block 17, a closed circuit is formed. The closed circuit has a power source, such as a battery. The power source supplies power to the entire circuit, so that the indicator light 18 lights up, indicating that the contact block compresses the buffer spring 15. The contact block may have touched the casting or the contact block is close to the casting. At this time, the separation device needs to be moved to another position to continue separating the sand.

[0047] As another implementation scheme, this embodiment can also send a signal to the controller when a closed circuit is formed, so that the two-way drive cylinder 9 retracts the push rod, the pry plate 7 approaches the shell 5, the lifting power device rises, the separation device is pulled out of the sand mold, and the position is changed and the sand mold is inserted again.

[0048] The present embodiment does not use gas to impact the sand mold, so the reason for the sand mold to break is that the gas will cause the sand to diffuse outward in a disorderly manner, causing the amount of sand around the production line to increase and causing dust.

[0049] like Figure 6 , Figure 8 As shown, a rotating wheel 19 is also installed in the shell 5, and an arc rod 20 is provided on the rotating wheel 19, and a gradual spring is arranged on the periphery of the arc rod 20. The rotating wheel 19 is connected to the pry plate 7 through a connecting rope. When the pry plate 7 is separated from the shell 5, the connecting rope drives the rotating wheel 19 to rotate so that the gradual spring is compressed. In particular, when the two-way driving cylinder 9 adopts a cylinder, the power is relatively large when the compressed gas is suddenly input into the cylinder, and the gradual spring is compressed, which can also reduce the initial movement force of the pry plate 7, thereby preventing the pry plate 7 from contacting the casting at the beginning of the movement and causing damage to the casting.

[0050] In addition, both the pry plate 7 and the movable plate 8 have ribs to strengthen the strength of the pry plate 7 and the movable plate 8. The ribs on the pry plate 7 also play a role in guiding the flow. Sand can move along the ribs on the pry plate 7, which facilitates the insertion of the shell 5 and the pry plate 7 into the sand mold and also allows the sand to fall off along the ribs.

[0051] like Fig. 9 , Fig.10As shown, the breaking device of this embodiment is used to break off the top riser or the top exhaust column. The breaking device includes a hydraulic cylinder 21. A lower block 22 is installed on the output shaft of the hydraulic cylinder 21. Two upper clamp bodies 26 are installed on the upper side of the lower block 22. The two upper clamp bodies 26 can move closer to or farther away from each other, thereby clamping the middle and upper ends of the top riser or the top exhaust column. Specifically, a connecting block 23 is provided at the front end of the hydraulic cylinder 21, and a matching plate 24 is installed at the rear end of the hydraulic cylinder 21. The connecting plate 14 and the matching plate 24 are movably installed with a push-pull rod 25, so that the push-pull rod 25 can be moved between the connecting block 23 and the matching plate 24. The clamp 24 moves linearly, and the front end of the push-pull rod 25 is connected to the upper clamp body 26 through a crank-connecting rod structure. The push-pull rod 25 drives the two upper clamp bodies 26 to separate or close. The two upper clamp bodies 26 clamp the middle and upper ends of the top riser or the top exhaust column. As a solution, the lower block 22 presses against the lower end of the top riser or the top exhaust column, and the upper clamp body 26 moves backward to break the top riser or the top exhaust column. As another solution, the lower block 22 presses against the lower end of the top riser or the top exhaust column, and the upper clamp body 26 and the lower block 22 move in opposite directions, so that the top riser or the top exhaust column is broken.

[0052] In addition, the push-pull rod 25 can be moved in two ways. The first way is: install a connecting plate on the two push-pull rods 25, and install a hand guard on the connecting plate to manually close and separate the upper clamp body 26. The second way is: install a connecting shaft on the connecting plate, connect it to the power equipment through a coupling, and rely on the power equipment to move the push-pull rod 25, thereby achieving the closing and separation of the upper clamp body 26.

[0053] As a more specific embodiment, Figure 11-Figure 12As shown, a jaw is installed on the upper jaw body 26, and a clamping plate 28 is arranged in the jaw. A clamping spring is installed at the rear end of the clamping plate 28. When in use, the lower end of the top riser or the top exhaust column is located in the jaw, and the top riser or the top exhaust column contacts the clamping plate 28, and the clamping spring is compressed. In this embodiment, a double-ended metal touch plate 30 is also installed on the clamping plate 28. The clamping plate 28 and the double-ended metal plate 29 are insulated. The double-ended metal touch plate 30 has two metal touch plates, and the two metal touch plates are connected together by wires. The upper jaw body 26 has a metal plate 29, and the metal plate 29 is divided into multiple metal partitions by an insulating plate. Each metal partition is connected to the indicating device through a wire. When the double-ended metal touch plate 30 contacts different metal partitions, the indicating device is triggered. For example For example, there are three metal partitions. When the double-end metal touch plate 30 is connected to the same metal partition, a closed loop cannot be formed, and the indicating device cannot be triggered. When the double-end metal touch plate 30 is respectively connected to two different metal partitions, a closed loop is formed. There is a power source in the closed loop, such as a battery. According to the indication information of the indicating device, the hydraulic cylinder 21 can be controlled to push the lower block 22 with different forces. For example, if the indication information generated by a thicker top riser or top exhaust column, the hydraulic cylinder 21 can be controlled to push the lower block 22 with a greater force. If the indication information generated by a thinner top riser or top exhaust column, the hydraulic cylinder 21 can be controlled to push the lower block 22 with a smaller force, thereby achieving different thrusts to deal with top risers or top exhaust columns of different thicknesses.

[0054] If automated equipment is used, a sensor can be installed close to the upper clamp body 26 to determine the movement distance of the clamping plate 28.

[0055] In addition, to facilitate the closing of the two upper caliper bodies 26 , a return spring 27 is installed on the upper caliper body 26 in this embodiment, one end of the return spring 27 is fixedly connected to one upper caliper body 26 , and the other end of the return spring 27 is fixedly connected to the other upper caliper body 26 .

[0056] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0057] Although the above describes the specific implementation methods of the present application in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present application. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present application, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present application.

Claims

1. A finished product demoulding process for sand casting, characterized in that: The following steps are involved: S1, transportation and positioning: moving the casting sand mold to be demoulded to the first station; S2, loosening the sand mold: at the first station, insert the plug into the casting sand mold to form a plug hole, and move the casting sand mold to the second station; S3, separation of large sand and casting: in the second station, the large sand is separated from the casting, and the casting and the remaining sand are moved to the third station; S4, vibration: At the third station, the sand on the surface of the casting is vibrated off and the casting is moved to the fourth station; S5, breaking off the top riser and the top exhaust column: at the fourth station, breaking off the top riser and the top exhaust column; The plug-in unit comprises a sleeve rod and an insertion rod, one end of the insertion rod protrudes from the sleeve rod, and the other end of the insertion rod is arranged inside the sleeve rod, and a compression spring inside the sleeve rod pushes the insertion rod out of the sleeve rod; The separation device comprises a housing, a contact is arranged at the front end of the housing, and two movable plates are arranged at the rear end of the housing, the two movable plates are hingedly matched, and a prying plate is staggeredly arranged on each movable plate to form two sets of movable plates and prying plates in an "X" structure; A bidirectional drive cylinder is arranged between the movable plates, and both ends of the bidirectional drive cylinder are respectively hingedly connected to the movable plates; The shell body is provided with a fixing plate, and the fixing plate is provided with a fixing rod.

2. The finished product demoulding process of a sand casting as claimed in claim 1, characterized in that: In step S2, a plurality of plug-ins are driven to move by a hydraulic cylinder so that the plug-ins are inserted into the casting sand mold, and the plug-ins are inserted into the casting sand mold multiple times in a staggered manner.

3. The finished product demoulding process of a sand casting as claimed in claim 1, characterized in that: In step S3, the separation device is inserted into the casting sand mold along the insertion hole, and the large pieces of sand are pried off by using the prying plate of the separation device.

4. The finished product demoulding process of a sand casting as claimed in claim 1, characterized in that: In step S5, the upper clamp body is used to clamp the middle and upper end of the top riser or the top exhaust column, and the lower block body is used to support the lower end of the top riser or the top exhaust column. The upper clamp body and the lower block body move in opposite directions to break the top riser or the top exhaust column.

5. A device for demoulding finished products of sand casting, comprising a vibrating machine, characterized in that: It includes an insert arranged at a first station, a separation device arranged at a second station, and a breaking device arranged at a fourth station; The vibrator is arranged at the third station, and the conveyor moves the casting and sand from the first station to the fourth station according to the station sequence; The plug-in unit comprises a sleeve rod and an insertion rod, one end of the insertion rod protrudes from the sleeve rod, and the other end of the insertion rod is arranged inside the sleeve rod, and a compression spring inside the sleeve rod pushes the insertion rod out of the sleeve rod; The separation device comprises a housing, a contact is arranged at the front end of the housing, and two movable plates are arranged at the rear end of the housing, the two movable plates are hingedly matched, and a prying plate is staggeredly arranged on each movable plate to form two sets of movable plates and prying plates in an "X" structure; A bidirectional drive cylinder is arranged between the movable plates, and both ends of the bidirectional drive cylinder are respectively hingedly connected to the movable plates; The shell body is provided with a fixing plate, and the fixing plate is provided with a fixing rod.

6. A finished product demoulding processing device for sand casting according to claim 5, characterized in that: The rear end of the contact is provided with a moving rod, the outer periphery of the moving rod is provided with a buffer spring, a first contact block and a second contact block are arranged separately in the housing, the first contact block is connected to the indicator light through a wire, the second contact block is connected to the indicator light through a wire, and the rear end of the moving rod is a conductive block connecting the first contact block and the second contact block; A rotating wheel is arranged in the shell, an arc rod is arranged on the rotating wheel, a gradual spring is arranged on the outer periphery of the arc rod, and the rotating wheel is connected to the pry plate through a connecting rope. When the pry plate is separated from the shell, the connecting rope drives the rotating wheel to rotate so that the gradual spring is compressed.

7. The finished product demoulding processing device of a sand casting as claimed in claim 5, characterized in that: The breaking device comprises a hydraulic cylinder, the output shaft of which is provided with a lower block, and the upper side of the lower block is provided with two upper clamp bodies; The front end of the hydraulic cylinder is provided with a connecting block, and the rear end of the hydraulic cylinder is provided with a matching plate. The connecting plate and the matching plate are movably provided with push-pull rods. The front end of the push-pull rod is connected to the upper caliper body through a crank connecting rod structure. The push-pull rod drives the two upper caliper bodies to separate or close. The upper caliper body is provided with a jaw, and a clamping plate is provided in the jaw.

8. The finished product demoulding processing device of a sand casting as claimed in claim 7, characterized in that: A clamping spring is provided at the rear end of the clamping plate, and a double-end metal touch plate is provided on the clamping plate. The double-end metal touch plate has two metal touch plates. A metal plate is provided in the upper clamp body, and the metal plate is divided into multiple metal partitions by an insulating plate. Each metal partition is connected to the indicating device through a wire. When the double-end metal touch plate contacts different metal partitions, the indicating device is triggered.

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