Coring unit suitable for small-batch multi-variety sand core production

Abstract

The utility model discloses a coring unit suitable for small-batch multi-variety sand core production, which is matched with a core box device, the core box device comprises a sleeve frame, an upper die movably arranged on the sleeve frame, a lower die fixed in the sleeve frame, a plurality of side dies movably arranged in the circumferential direction of the lower die, and a lower core ejection mechanism arranged on the sleeve frame, a sand core is formed in a cavity formed by the upper die, the lower die and the multiple side dies, the lower core ejecting mechanism extends into the cavity, and the core taking unit comprises a core taking device used for locking a core box device and comprising a rack, a core box locking mechanism arranged on the rack and used for locking the core box device and an ejecting mechanism installed on the rack and used for ejecting a sleeve frame and the sand core; the clamp device is used for clamping the upper die, the sleeve frame and the sand core and comprises a mounting base, a core taking fork assembly arranged on the mounting base and used for clamping the sand core and a clamping shaft mechanism used for clamping the upper die and the sleeve frame. The coring unit provided by the utility model can improve the production efficiency and reduce the energy consumption.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting, and particularly relates to a core-taking unit suitable for the production of small-batch and multi-variety sand cores. Background Art

[0002] Today, with the increasingly fierce competition in casting products, the development of new casting products can effectively enhance market competitiveness, improve customer satisfaction, reduce costs, improve efficiency, and enhance the innovation ability of enterprises, etc.

[0003] Generally, when developing new products, a variety of sand cores are required, but the batch size is not large. On the premise of ensuring good quality, a short production cycle is required, and costs also need to be considered.

[0004] For the production of such small-batch and multi-variety sand cores, a general core box plus manual core-taking method is usually adopted. However, this method has a large manual labor intensity, and it is difficult to take cores of complex sand cores.

[0005] When using mechanical core-taking, the upper mold is on the top and the sleeve frame is at the bottom. When taking cores, the lifting mechanism lifts the upper mold to open the mold and simultaneously performs upward core pushing, and then the lower core-pushing mechanism is used to push the sand core out of the mold. The processes of upward and downward core pushing respectively require corresponding driving forces, with a complex structure and high energy consumption. Summary of the Utility Model

[0006] Based on the above problems, the purpose of the utility model is to provide a core-taking unit suitable for the production of small-batch and multi-variety sand cores, which can reduce labor intensity and improve production efficiency.

[0007] In order to overcome the deficiencies of the prior art, the technical solution provided by the utility model is as follows:

[0008] A core-taking unit suitable for the production of small-batch and multi-variety sand cores, which cooperates with a core box device. The core box device includes a sleeve frame, an upper mold movably arranged on the sleeve frame, a lower mold fixed in the sleeve frame, a plurality of side molds movably arranged on the circumference of the lower mold, and a lower core-pushing mechanism installed on the sleeve frame. The sand core is formed in the cavity formed by the upper mold, the lower mold, and the plurality of side molds. The lower core-pushing mechanism extends into the cavity. The core-taking unit includes:

[0009] A core-taking device for locking the core box device, including a frame, a core box locking mechanism arranged on the frame for locking the core box device, and a top-out mechanism installed on the frame for ejecting the sleeve frame and the sand core;

[0010] A jig device for clamping the upper mold, the sleeve frame, and the sand core, including a mounting base, a core-taking fork assembly arranged on the mounting base for clamping the sand core, and a card shaft mechanism for clamping the upper mold and the sleeve frame.

[0011] In one embodiment, the frame includes a base and a support platform disposed on the base, and the core box device is disposed on the support platform.

[0012] In one embodiment, the ejection mechanism includes a top plate member, a first ejector rod assembly disposed at the upper end of the top plate member for ejecting the sleeve frame and a second ejector rod assembly for ejecting the core, a first driving member for driving the top plate member to move up and down, and a guide rod assembly disposed at the lower end of the top plate member;

[0013] The second ejector rod assembly includes a plurality of second ejector rods disposed in the middle of the top plate member, the first ejector rod assembly includes a plurality of first ejector rods disposed on the outer periphery of the second ejector rod assembly, the height of the first ejector rod is greater than that of the second ejector rod, and the upper die is provided with a first through hole for the first ejector rod to pass through and a second through hole for the second ejector rod to pass through.

[0014] In one embodiment, the core box locking mechanism includes two upper die locking members symmetrically disposed on the support platform for locking the upper die and two locking assemblies symmetrically disposed outside the base for locking the sleeve frame.

[0015] In one embodiment, the upper die locking member is an L-shaped locking block hinged to the support platform;

[0016] The locking assembly includes a first support member fixed to the side of the frame, a second support member hinged to the first support member, and a locking member disposed on the second support member. The locking member is threadedly connected to the second support member and abuts against the lower core ejecting mechanism.

[0017] In one embodiment, pin shafts are provided on the sides of the upper die and the sleeve frame. The pin shaft mechanism includes at least one pin sleeve for the pin shaft to extend into and a pin shaft assembly for locking the pin shaft in the corresponding pin sleeve.

[0018] In one embodiment, the pin shaft assembly includes two clamping block components symmetrically disposed on both radial sides of the pin sleeve and a second driving member for driving the two clamping block components to move towards or away from each other.

[0019] In one embodiment, a guiding assembly is provided between the clamping block component and the mounting base. The guiding assembly includes a guiding rod extending along the moving direction of the clamping block component and a linear bearing disposed on the mounting base and matching with the guiding rod.

[0020] In one embodiment, an elastic member is further sleeved on the guiding rod between the clamping block component and the mounting base.

[0021] In one embodiment, the core fork assembly includes a plurality of core forks arranged at intervals, an installation groove is provided on the installation base, and the plurality of core forks are detachably arranged in the installation groove;

[0022] The core fork includes a first fork portion extending in the vertical direction and a second fork portion extending in the horizontal direction from the first fork portion.

[0023] Compared with the prior art, the advantages of the present utility model are as follows:

[0024] 1. After the core is made, the core box device is locked by the core-taking device, and then the components of the core box device and the core are clamped by the cooperation of the fixture device and the robot, reducing the labor intensity of workers, improving the core-making efficiency, and solving the problem of difficult core-taking for complex cores;

[0025] 2. The core-taking device can lock the upper mold and the sleeve frame of the core box device respectively, with good stability;

[0026] 3. The fixture device and the ejection mechanism cooperate to quickly clamp the upper mold, the sleeve frame and the core of the core box device, with good versatility, convenient operation and high efficiency;

[0027] 4. When taking the core, the sleeve frame and the core can be ejected respectively by using the ejection mechanism, and the core-taking can be completed by using one power source, reducing the energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. The following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of an embodiment of a core-taking unit suitable for small-batch and multi-variety core production of the present utility model;

[0030] Figure 2 It is a schematic structural diagram of a core box device in an embodiment of the present utility model;

[0031] Figure 3 It is a schematic structural diagram of a core-taking device in an embodiment of the present utility model;

[0032] Figure 4 It is a partial schematic structural diagram of an ejection mechanism in an embodiment of the present utility model;

[0033] Figure 5 It is one of the schematic structural diagrams of a fixture device in an embodiment of the present utility model;

[0034] Figure 6This is the second structural schematic diagram of the fixture device in the embodiment of the present utility model;

[0035] Figure 7 This is the third structural schematic diagram of the fixture device in the embodiment of the present utility model;

[0036] Figure 8 This is the structural schematic diagram of the cooperation between the fixture device and the pin shaft in the embodiment of the present utility model;

[0037] Figure 9 This is the first structural schematic diagram of the fixture device clamping the sleeve frame in the embodiment of the present utility model;

[0038] Figure 10 This is the second structural schematic diagram of the fixture device clamping the sleeve frame in the embodiment of the present utility model;

[0039] Figure 11 This is the structural schematic diagram of the fixture device clamping the sand core in the embodiment of the present utility model;

[0040] Figure 12 This is the structural schematic diagram of the upper die locking member locking the upper die in the embodiment of the present utility model;

[0041] Figure 13 This is the structural schematic diagram of the locking assembly locking the sleeve frame in the embodiment of the present utility model;

[0042] Figure 14 This is the structural schematic diagram of the ejecting mechanism ejecting the sleeve frame in the embodiment of the present utility model;

[0043] Figure 15 This is the structural schematic diagram of the fixture device clamping the sleeve frame in the embodiment of the present utility model;

[0044] Figure 16 This is the structural schematic diagram of the fixture device clamping the sand core in the embodiment of the present utility model;

[0045] Figure 17 This is the structural schematic diagram of the fixture device clamping the upper die in the embodiment of the present utility model;

[0046] Wherein:

[0047] 100, upper die; 200, sleeve frame; 300, lower die; 400, side die; 500, lower core ejecting mechanism; 501, lower top plate; 502, lower ejector rod; 503, elastic reset member; 600, sand core; 700, pin shaft; 701, limiting groove;

[0048] 1, frame; 1-1, base; 1-2, support table;

[0049] 2, ejecting mechanism; 2-1, top plate member; 2-2, first ejector rod; 2-3, second ejector rod; 2-4, first driving component; 2-5, guide rod;

[0050] 3. Upper die locking member;

[0051] 4. Locking assembly; 4-1. First support member; 4-2. First support portion; 4-3. Second support portion; 4-4. Locking member;

[0052] 5. Guide bushing.

[0053] 6. Installation base; 6-1. Slide groove;

[0054] 7. Core extraction fork; 7-1. First fork portion; 7-2. Second fork portion

[0055] 8. Pin bushing;

[0056] 9. Second driving member;

[0057] 10. Clamping block;

[0058] 11. Connecting plate;

[0059] 12. Guide rod;

[0060] 13. Elastic member;

[0061] 14. Linear bearing. Detailed implementation manners

[0062] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are for illustrating the present invention and not for limiting the scope of the present invention. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually those in conventional experiments.

[0063] See Figure 1 , which is a schematic structural diagram of an embodiment of the present invention. A core extraction unit suitable for small-batch and multi-variety sand core production is provided. It cooperates with a core box device for core extraction during sand core core making, including a core extraction device and a fixture device. After the sand core 600 is made, the core box device is locked by the core extraction device, and then the components of the core box device and the sand core 600 are clamped by the fixture device.

[0064] The core box device is used for the formation of the sand core 600. As Figure 2 shown, it includes a sleeve frame 200, an upper die 100 movably arranged on the sleeve frame 200, a lower die 300 fixed in the sleeve frame 200, a plurality of side dies 400 movably arranged circumferentially of the lower die, and a lower core pushing mechanism 500 installed on the sleeve frame 200. The sand core 600 is formed in the cavity between the upper die 100, the lower die 300 and the plurality of side dies 400, and the lower core pushing mechanism 500 extends into the cavity.

[0065] The lower ejector mechanism 500 includes a lower ejector plate 501 and a plurality of lower ejector rods 502 disposed on the lower ejector plate 501. The lower ejector rods 502 extend from the sleeve frame 200 into the cavity. An elastic reset member 503 is sleeved on the lower ejector rods 502 between the sleeve frame 200 and the lower mold 300. Preferably, the elastic reset member 503 is a spring.

[0066] Coring device, used to lock the core box device, such as Figure 3 As shown, it includes a frame 1, a core box locking mechanism arranged on the frame 1 for locking the core box device, and an ejection mechanism 2 installed on the frame 1 for ejecting the sleeve frame 200 and the sand core 600.

[0067] The frame 1 includes a base 1-1 and a support platform 1-2 arranged on the base 1-1. The core box device is turned 180 degrees and placed on the support platform 1-2. The support platform 1-2 includes a plurality of columns vertically arranged on the base 1-1, and the upper mold 100 is placed on the plurality of columns.

[0068] The ejection mechanism 2 is arranged on the base 1-1, such as Figure 4 As shown, it includes a top plate 2-1, a first push rod assembly arranged on the top plate 2-1 for ejecting the sleeve frame 200 and a second push rod assembly for ejecting the sand core 600, and a first driving component 2-4 for driving the top plate 2-1 to move up and down, wherein the first driving component 2-4 adopts an oil cylinder, and the top plate 2-1 is transmission-connected to the oil cylinder, and the top plate 2-1 is driven to move up and down by the oil cylinder, thereby driving the first push rod assembly and the second push rod assembly to move up and down.

[0069] The second push rod assembly includes a plurality of second push rods 2-3 arranged in the middle of the push plate 2-1, and the first push rod assembly includes a plurality of first push rods 2-2 arranged on the outer periphery of the second push rod assembly. The height of the first push rod 2-2 is greater than that of the second push rod 2-3. Accordingly, a first through hole for the first push rod 2-2 to pass through and a second through hole for the second push rod 2-3 to pass through are provided on the upper mold 100. When the first driving component 2-4 drives the push plate 2-1 to move upward, the first push rod 2-2 first extends to the top of the upper mold 100 to push out the sleeve frame 200, so that the clamping device can remove the sleeve frame 200. After the plurality of side molds 400 are manually removed, the first driving component 2-4 drives the push plate 2-1 to continue to move upward, and the second push rod 2-3 pushes out the sand core 600 on the upper mold 100, so that the clamping device can remove the sand core 600.

[0070] Preferably, a plurality of second ejector rods 2 - 3 are arranged in an array, so as to stably eject the sand core 600 .

[0071] To improve the stability of the ejection mechanism 2 during operation, the ejection mechanism 2 further includes a guide rod assembly. The guide rod assembly includes a plurality of guide rods 2-5 provided at the lower end of the top plate member 2-1. At the same time, a plurality of guide sleeves 5 matching the plurality of guide rods 2-5 are provided on the base 1-1. When the first driving member 2-4 drives the top plate member 2-1 to move up and down, the guide rods 2-5 move up and down within the guide sleeves 5, thereby preventing the top plate member 2-1 from shifting during the up and down movement.

[0072] The core box locking mechanism is installed on the frame 1 and cooperates with the frame 1 to lock the core box device. It includes two upper die locking members 3 symmetrically arranged on the support table 1-2 for locking the upper die 100 and two locking assemblies symmetrically arranged outside the base 1-1 for locking the sleeve frame 200.

[0073] Among them, the upper die locking member 3 is an L-shaped locking block hinged to the support table 1-2. When the upper die 100 is placed on the support table 1-2, the upper die locking member 3 is rotated to clamp the upper die 100 on the support table 1-2.

[0074] The locking assembly includes a first support member 4-1 fixed to the side of the base 1-1, a second support member hinged to the first support member 4-1, and a locking member 4-4 provided on the second support member. The first support member 4-1 extends vertically upward. The second support member includes a first support portion 4-2 hinged to the first support member 4-1 and a second support portion 4-3 connected to the first support portion 4-2 at a right angle. Among them, the second support portion 4-3 extends towards the middle of the frame 1, and the locking member 4-4 is provided at the end of the second support portion 4-3. When it is necessary to lock the sleeve frame 200, the second support member is rotated so that the locking member 4-4 is located above the sleeve frame 200 to lock the sleeve frame 200 on the upper die 100.

[0075] In this example, the locking member 4-4 is threadedly connected to the second support portion and can abut against the lower core-pushing mechanism 500. By rotating the locking member 4-4 to make it abut against the lower core-pushing mechanism 500, the sleeve frame 200 is locked on the upper die 100.

[0076] As Figures 5 to 7 shown, the fixture device includes a mounting base 6, a core-taking fork assembly provided on the mounting base 6 for clamping the core 600, and a card shaft mechanism for clamping the upper die 100 and the sleeve frame 200. Two pin shafts 700 are arranged at intervals on the sides of the upper die 100 and the sleeve frame 200. Correspondingly, the card shaft mechanism includes two pin sleeves 8 for the pin shafts 700 to extend into and a card shaft assembly for locking the pin shafts 700 in the corresponding pin sleeves 8. The card shaft assembly is arranged on one axial side of the pin sleeve 8. By clamping the pin shafts 700 in the corresponding pin sleeves 8 through the card shaft assembly, the fixture device clamps the upper die 100 or the sleeve frame 200 (as Figure 9 and Figure 10 shown).

[0077] Specifically, the chuck shaft assembly includes two clamping block components symmetrically arranged on the two radial sides of the pin sleeve 8 and a second driving component 9 for driving the two clamping block components to move towards or away from each other. Preferably, the second driving component 9 adopts two double-acting cylinders arranged in parallel up and down, which can drive the two clamping block components to move synchronously, realize the clamping or release of the pin shaft 700, and ensure the stability of the movement of the chuck block assembly (as Figure 8 shown).

[0078] Among them, the clamping block component includes a clamping block 10 and a connecting plate 11 connecting the clamping block 10 and the second driving component 9. An arc-shaped positioning groove is provided on the side of the clamping block 10 facing the pin shaft 700, so as to facilitate the two clamping blocks 10 to clamp the pin shaft 700.

[0079] In order to improve the stability of the structure, a circle of limiting grooves 701 matching the clamping block 10 is provided on the outer wall of the pin shaft 700. The second driving component 9 drives the two clamping blocks 10 to move towards each other into the limiting grooves 701 to realize the clamping of the pin shaft 700.

[0080] In order to further improve the stability of the structure, a sliding groove matching the connecting plate 11 is provided on the mounting base 6.

[0081] In order to further improve the stability of the clamping structure, at least one guiding component is provided between the clamping block component and the mounting base 6. Preferably, two guide rod components are arranged up and down on the chuck block component to ensure the stability of the structure. Specifically, the guiding component includes a guiding rod 12 extending along the moving direction of the clamping block component and a linear bearing 14 provided on the mounting base 6 and matching the guiding rod 12. When the second driving component 9 drives the clamping block component to move, the guiding rod 12 slides in the linear bearing 14 to play a guiding role and prevent the clamping block component from shifting.

[0082] In order to further improve the stability of the structure and at the same time facilitate the stable clamping of the clamping block component on the pin shaft 700, an elastic member 13 is provided on the guiding rod 12 between the clamping block component and the mounting base 5. The setting of the elastic member can make the clamping block 10 stably clamp on the pin shaft 700. Even when the second driving component 9 cannot work properly, the work of the chuck shaft mechanism can still be ensured. Preferably, the elastic member 13 adopts a spring.

[0083] The core-pulling fork assembly includes a plurality of core-pulling forks 7 arranged at intervals. An installation groove is provided on the mounting base 6, and the plurality of core-pulling forks 7 are detachably arranged in the installation groove. During use, the number and position of the core-pulling forks 7 can be selected according to needs to adapt to the clamping of different sand core products.

[0084] Specifically, the core-pulling fork 7 includes a first fork portion 7-1 extending in the vertical direction and a second fork portion 7-2 extending from the first fork portion 7-1 in the horizontal direction, that is, the second fork portion 7-2 is connected to the first fork portion 7-1 to form an L shape. AsFigure 11 As shown in the figure, when clamping the core 600, place the second fork part 7-2 below the core 600, and the core 600 can be clamped by lifting the fixture device upward through the robot.

[0085] The working principle of the present utility model is as follows:

[0086] After the production of the core 600 is completed, use the clamping shaft assembly of the fixture device to clamp the pin shaft 700 on the side of the sleeve frame 200 of the core box device. After the entire core box device is carried out of the core making machine, it is flipped 180 degrees and finally carried to the support table 1-2 of the core taking device. Rotate the upper mold locking part 3 to lock the upper mold 100 on the support table 1-2, and open the locking hook between the upper mold 100 and the sleeve frame 200, (as Figure 12 shown), then rotate the second support member to make the locking part 4-4 located above the core box device, and rotate the locking part 4-4 to make it abut against the lower core pushing mechanism 500 to lock the entire core box device (as Figure 13 shown); the first driving part 2-4 drives the top plate part 2-1 to move upward to eject the sleeve frame 200. Under the action of the lower ejector rod mechanism 500, the core 600 is separated from the lower mold 300 (as Figure 14 shown), open the two locking components, and use the fixture device to take away the sleeve frame 200 (as Figure 15 shown). After manually taking away multiple side molds 400, the ejecting mechanism 2 is lifted upward again to eject the core 600 from the upper mold 100, and then use the fixture device to take away the core 600 (as Figure 16 shown). The ejecting mechanism 2 resets, opens the upper mold locking part 3 between the upper mold 100 and the support table 1-2, and finally uses the fixture device to take away the upper mold 100 (as Figure 17 shown).

[0087] In summary, the core taking unit suitable for small batch and multi-variety core production can realize semi-automatic core taking, clamping of the core box device and other operations, reduce labor intensity, and improve the efficiency of core making suitable for small batch and multi-variety.

[0088] The above examples are only for explaining the technical concept and characteristics of the present utility model, and the purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it cannot be used to limit the protection scope of the present utility model. All equivalent transformations or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A coring unit suitable for the production of small batches of multi-variety sand cores, which cooperates with a core box device, the core box device comprising a sleeve frame, an upper die movably arranged on the sleeve frame, a lower die fixed in the sleeve frame, a plurality of side dies movably arranged in the circumference of the lower die, and a lower ejector mechanism installed on the sleeve frame, the sand core is formed in a cavity formed by the upper die, the lower die and the plurality of side dies, the lower ejector mechanism extends into the cavity, and is characterized in that: The coring unit comprises: A coring device, used for locking the core box device, comprising a frame, a core box locking mechanism arranged on the frame for locking the core box device, and an ejection mechanism installed on the frame for ejecting the sleeve frame and the sand core; The clamp device is used for clamping the upper mold, sleeve frame and sand core, and comprises a mounting base, a coring fork assembly arranged on the mounting base for clamping the sand core, and a clamping shaft mechanism for clamping the upper mold and sleeve frame.

2. The coring unit suitable for small batch multi-variety sand core production according to claim 1 is characterized in that: The frame comprises a base and a support platform arranged on the base, and the core box device is arranged on the support platform.

3. The coring unit suitable for small batch multi-variety sand core production according to claim 2 is characterized in that: The ejection mechanism includes an ejector plate, a first ejector rod assembly disposed at the upper end of the ejector plate for ejecting the sleeve frame, a second ejector rod assembly disposed at the upper end of the ejector plate for ejecting the sand core, a first driving component for driving the ejector plate to move up and down, and a guide rod assembly disposed at the lower end of the ejector plate; The second push rod assembly includes a plurality of second push rods arranged in the middle of the push plate member, the first push rod assembly includes a plurality of first push rods arranged on the outer periphery of the second push rod assembly, the height of the first push rods is greater than that of the second push rods, and the upper mold is provided with a first through hole for the first push rods to pass through and a second through hole for the second push rods to pass through.

4. The coring unit suitable for small batch multi-variety sand core production according to claim 2 is characterized in that: The core box locking mechanism comprises two upper die locking members symmetrically arranged on the support platform for locking the upper die and two locking assemblies symmetrically arranged on the outer side of the base for locking the sleeve frame.

5. The coring unit suitable for small batch multi-variety sand core production according to claim 4 is characterized in that: The upper die locking member is an L-shaped locking block hinged on the support platform; The locking assembly includes a first support member fixed to the side of the frame, a second support member hinged on the first support member, and a locking member arranged on the second support member. The locking member is threadedly connected to the second support member and abuts against the lower core mechanism.

6. The coring unit suitable for small batch multi-variety sand core production according to claim 1, characterized in that: The upper die and the side of the sleeve frame are provided with a pin shaft, and the clamping shaft mechanism comprises at least one pin sleeve for the pin shaft to extend into and a clamping shaft assembly for locking the pin shaft in the corresponding pin sleeve.

7. The coring unit suitable for small batch multi-variety sand core production according to claim 6, characterized in that: The clamping shaft assembly comprises two clamping block components symmetrically arranged on both sides of the pin sleeve in the radial direction and a second driving component driving the two clamping block components to move toward or away from each other.

8. The coring unit suitable for small batch multi-variety sand core production according to claim 7, characterized in that: A guide assembly is provided between the clamping block component and the mounting base, and the guide assembly comprises a guide rod extending along the moving direction of the clamping block component and a linear bearing arranged on the mounting base and matched with the guide rod.

9. The coring unit suitable for small batch multi-variety sand core production according to claim 8, characterized in that: An elastic member is sleeved on the guide rod between the clamping block component and the mounting base.

10. The coring unit suitable for small batch multi-variety sand core production according to claim 6, characterized in that: The coring fork assembly comprises a plurality of coring forks arranged at intervals, the mounting base is provided with a mounting groove, and the plurality of coring forks are detachably arranged in the mounting groove; The coring fork includes a first fork portion extending in a vertical direction and a second fork portion extending from the first fork portion in a horizontal direction.

Images