Core making equipment for sand mold casting

Abstract

The utility model relates to the technical field of core making equipment, and discloses core making equipment for sand mold casting, which comprises a core making box and a molding sand box, the molding sand box is arranged in the core making box, a servo motor is arranged at the lower part of one side of the core making box, and a screw rod assembly is arranged on the bottom surface in the core making box. A servo motor is arranged in the core making box, an output rod of the servo motor rotationally penetrates through the core making box to be connected to the input end of the lead screw assembly, and clamping plates are symmetrically fixed to the output end of the lead screw assembly. The air permeability can be guaranteed, the strength of the molding sand can be guaranteed, the problem that the molding sand prepared by existing core making equipment for sand mold casting is poor in air permeability or insufficient in strength is solved, and the situation that the molding sand does not have air permeability due to repeated pressing is avoided.

Description

Technical Field

[0001] This utility model application relates to the field of core-making equipment technology, specifically a core-making device for sand casting. Background Technology

[0002] Sand casting is a casting method that produces castings in sand molds. A molding sand binder is added during casting to bind loose sand particles together to form molding sand. The molding sand needs to have a certain degree of permeability. After the high-temperature molten metal is poured into the mold, the mold is filled with a large amount of gas. The higher the compactness of the sand mold, the worse the permeability. At the same time, the molding sand must have sufficient strength to prevent collapse during molding, handling, and mold assembly, and to prevent damage to the surface of the mold during pouring.

[0003] However, existing core-making equipment repeatedly presses the molding sand during preparation to ensure its strength in order to avoid voids in the molding sand affecting the molding effect after the molten metal is poured in. However, repeated pressing will make the molding sand less breathable, causing the gas inside the mold to be unable to escape, which will also affect the molding effect. Summary of the Invention

[0004] To address the problem that existing core-making equipment for sand casting produces molding sand with poor permeability or insufficient strength, this invention provides a core-making device for sand casting to solve the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A core-making device for sand casting includes a core-making box and a molding sand box. The molding sand box is installed inside the core-making box. A servo motor is installed on the lower part of one side of the core-making box. A lead screw assembly is installed on the bottom surface inside the core-making box. The output rod of the servo motor rotates through the core-making box and is connected to the input end of the lead screw assembly. Clamping plates are symmetrically fixed at the output end of the lead screw assembly.

[0007] A support frame is fixed in the middle of the top surface of the core-making box. A servo cylinder is installed in the middle of the top surface of the support frame. A pressure plate that cooperates with the molding sand box is slidably installed inside the support frame. The pressure plate is detachably fixed on the output rod of the servo cylinder. A vibration generator is installed on the side of the core-making box. A vibration screw is fixed at the output end of the vibration generator. The vibration screw penetrates into the interior of the core-making box.

[0008] Furthermore, a conductive sleeve is threaded onto one end of the vibrating screw that extends into the core-making box. The conductive sleeve is configured as a horizontally placed T-shape, and the end of the conductive sleeve away from the vibration generator abuts against the side wall of the molding sand box.

[0009] Furthermore, the bottom surfaces of the core-making boxes on both sides of the lead screw assembly are fixed with guide plates that slope outwards. Each guide plate has a discharge groove on its side, and a side cover plate is provided on the outside of the discharge groove. The top of the side cover plate is rotatably connected to the side of the core-making box via a hinge.

[0010] Furthermore, anti-slip pads are glued to the side of both clamping plates near the molding sand box, and the core-making box has a slot on the side away from the vibration generator that matches the molding sand box. Handles are symmetrically fixed to the side of the molding sand box facing the slot.

[0011] Furthermore, a connecting plate is fixed to the bottom surface of the servo cylinder output rod, and a limiting plate is symmetrically fixed to the bottom surface of the connecting plate. A fixing block is sleeved between the two limiting plates, and the bottom surface of the fixing block is fixed to the top surface of the pressure plate. A fixing frame is slidably sleeved on the outer side of each of the two limiting plates, and a sliding rod is slidably sleeved on the outer side of each of the two fixing frames. The inner side of the sliding rod is fixed to the outer wall of the limiting plate. A spring is sleeved on the sliding rod on the outer side of each fixing frame, and both ends of the spring are fixed to the sliding rod and the fixing frame, respectively.

[0012] Furthermore, the top surface of the connecting plate is symmetrically fixed with limit rods, and both limit rods are slidably inserted into the support frames on both sides of the servo cylinder.

[0013] Furthermore, both of the fixed frames are configured as horizontally placed U-shapes, and both of the slide rods are configured as horizontally placed T-shapes, with the length of each slide rod being greater than the length of the fixed frames.

[0014] Furthermore, the support frame is configured as an inverted U-shape that cooperates with the core-making box, the fixing block is configured as a T-shape, and both limiting plates are configured as L-shapes that cooperate with the fixing block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this utility model, by combining vibration and pressing, the internal density of the molding sand is maintained by vibration when the molding sand is put in, and then the pressure plate is pressed appropriately. This ensures both air permeability and strength of the molding sand, solving the problem that the molding sand produced by existing core-making equipment for sand casting has poor air permeability or insufficient strength, and avoiding repeated pressing that causes the molding sand to lose its air permeability.

[0017] 2. In this utility model, the detachable design of the molding sand box makes it convenient to remove the supporting molding sand in a timely manner. Furthermore, the detachable and movable design of the pressure plate makes it easy to adapt to molding sand boxes of different sizes, thereby greatly improving the applicability of the core-making equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the back of a core-making apparatus structure according to an embodiment of this application;

[0020] Figure 2 yes Figure 1 The diagram shown is a front view of the core-making equipment during operation in the embodiment shown.

[0021] Figure 3 yes Figure 1 The diagram shows a front view of the pressure plate connection structure in the illustrated embodiment.

[0022] Figure 4 yes Figure 1 The diagram shown is a bottom view of the pressure plate connection structure in the embodiment shown.

[0023] The meanings of the reference numerals in the diagram are as follows: 1. Core-making box; 2. Molding sand box; 3. Servo motor; 4. Lead screw assembly; 5. Vibration generator; 6. Vibration screw; 7. Conducting sleeve; 8. Clamping plate; 9. Guide plate; 10. Side cover plate; 11. Pressure plate; 12. Servo cylinder; 13. Limiting rod; 14. Connecting plate; 15. Fixing block; 16. Limiting plate; 17. Fixing frame; 18. Slide rod; 19. Spring; 20. Support frame. Detailed Implementation

[0024] To make the purpose, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Reference Figure 1 and Figure 2A core-making device for sand casting includes a core-making box 1 and a molding sand box 2. The molding sand box 2 is installed inside the core-making box 1. A servo motor 3 is installed on the lower part of one side of the core-making box 1. A lead screw assembly 4 is installed on the bottom surface inside the core-making box 1. The output rod of the servo motor 3 rotates through the core-making box 1 and is connected to the input end of the lead screw assembly 4. The bottom surfaces of the core-making box 1 on both sides of the lead screw assembly 4 are fixed with outwardly inclined guide plates 9. The sides of the guide plates 9 are provided with discharge grooves, and the outside of the discharge grooves is provided with side cover plates 10. The top of the side cover plates 10 is rotatably connected to the side of the core-making box 1 by hinges. The output end of the lead screw assembly 4 is symmetrically fixed with clamping plates 8. The two clamping plates 8 are glued with anti-slip pads on the side of the side of the molding sand box 2. The side of the core-making box 1 away from the vibration generator 5 is provided with a slot that cooperates with the molding sand box 2. The side of the molding sand box 2 facing the slot is symmetrically fixed with handles.

[0026] A support frame 20 is fixed in the middle of the top surface of the core-making box 1. A servo cylinder 12 is set in the middle of the top surface of the support frame 20. A pressure plate 11 that cooperates with the molding sand box 2 is slidably set inside the support frame 20. The pressure plate 11 is detachably fixed on the output rod of the servo cylinder 12. A vibration generator 5 is set on the side of the core-making box 1. A vibration screw 6 is fixed at the output end of the vibration generator 5. The vibration screw 6 penetrates into the interior of the core-making box 1. A transmission sleeve 7 is threadedly connected to one end of the vibration screw 6 that penetrates into the interior of the core-making box 1. The transmission sleeve 7 is set as a horizontally placed T-shape. The end of the transmission sleeve 7 away from the vibration generator 5 abuts against the side wall of the molding sand box 2.

[0027] Specifically, when core making is required, the molding sand box 2 is placed into the core making box 1 through slotting. The servo motor 3 is turned on, causing the two clamping plates 8 to move relative to each other and clamp the molding sand box 2. After the molding sand box 2 is fixed inside the core making box 1, molding sand is added into the molding sand box 2. The transmission sleeve 7 is rotated, causing the transmission sleeve 7 to abut against the side of the molding sand box 2 under the action of the thread. Then, the vibration generator 5 is turned on, and the vibration force is transmitted to the molding sand box 2 through the vibration screw 6 and the transmission sleeve 7, which can compact the molding sand inside the molding sand box 2. Then, the servo cylinder 12 moves and drives the pressure plate 11 to move down, which moves the pressure plate 11 down to appropriately compact the molding sand inside the molding sand box 2. The servo motor 3 moves and drives the screw inside the screw assembly 4 to rotate in the opposite direction, which can drive the clamping plate 8 to open and pull the molding sand box 2 out from the core making box 1.

[0028] As an optimization solution, such as Figure 3 and Figure 4As shown, a connecting plate 14 is fixed to the bottom surface of the output rod of the servo cylinder 12. Limiting rods 13 are symmetrically fixed to the top surface of the connecting plate 14. Both limiting rods 13 are slidably inserted into the support frames 20 on both sides of the servo cylinder 12. Limiting plates 16 are symmetrically fixed to the bottom surface of the connecting plate 14. A fixing block 15 is sleeved between the two limiting plates 16. The support frame 20 is configured as an inverted U-shape to cooperate with the core-making box 1. The fixing block 15 is configured as a T-shape. Both limiting plates 16 are configured as L-shapes to cooperate with the fixing block 15, and the bottom surface of the fixing block 15 is fixed to the pressure... On the top surface of plate 11, two limiting plates 16 are slidably fitted with fixed frames 17 on their outer sides. Both fixed frames 17 are U-shaped and placed horizontally. Both sliding rods 18 are T-shaped and placed horizontally. The length of each sliding rod 18 is greater than the length of the fixed frame 17. Sliding rods 18 are slidably fitted on the outer sides of the two fixed frames 17, and the inner sides of the sliding rods 18 are fixed to the outer wall of the limiting plates 16. A spring 19 is fitted on the sliding rod 18 on the outer side of each fixed frame 17, and the two ends of the spring 19 are fixed to the sliding rod 18 and the fixed frame 17 respectively.

[0029] Specifically, when replacing the molding sand box 2 with a different size, the pressure plate 11 needs to be replaced. When replacing it, pull the fixing frame 17 on both sides so that the fixing frame 17 slides on the slide rod 18 and compresses the spring 19. This will release the fixing frame 17 from the fixing block 15, pull the fixing block 15 out from the inside of the limiting plate 16, replace the new pressure plate 11, and insert the fixing block 15 between the two limiting plates 16. Release the fixing frame 17 so that the fixing frame 17 limits the fixing block 15, and the pressure plate 11 can be fixed to the bottom surface of the connecting plate 14.

[0030] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A core-making device for sand casting, characterized in that: It includes a core-making box (1) and a molding sand box (2). The molding sand box (2) is installed inside the core-making box (1). A servo motor (3) is installed on the lower side of the core-making box (1). A lead screw assembly (4) is installed on the bottom surface inside the core-making box (1). The output rod of the servo motor (3) rotates through the core-making box (1) and is connected to the input end of the lead screw assembly (4). A clamping plate (8) is symmetrically fixed at the output end of the lead screw assembly (4). A support frame (20) is fixed in the middle of the top surface of the core-making box (1). A servo cylinder (12) is provided in the middle of the top surface of the support frame (20). A pressure plate (11) that cooperates with the molding sand box (2) is slidably provided inside the support frame (20). The pressure plate (11) is detachably fixed on the output rod of the servo cylinder (12). A vibration generator (5) is provided on the side of the core-making box (1). A vibration screw (6) is fixed at the output end of the vibration generator (5). The vibration screw (6) penetrates into the interior of the core-making box (1).

2. The core-making equipment for sand casting according to claim 1, characterized in that: The vibrating screw (6) extends into the core-making box (1) and is threaded with a transmission sleeve (7). The transmission sleeve (7) is configured as a horizontally placed T-shape, and the end of the transmission sleeve (7) away from the vibration generator (5) abuts against the side wall of the molding sand box (2).

3. The core-making equipment for sand casting according to claim 1, characterized in that: The bottom surface of the core-making box (1) on both sides of the lead screw assembly (4) is fixed with an outwardly inclined guide plate (9). The guide plate (9) has a discharge groove on its side, and a side cover plate (10) is provided on the outside of the discharge groove. The top of the side cover plate (10) is rotatably connected to the side of the core-making box (1) by a hinge.

4. The core-making equipment for sand casting according to claim 1, characterized in that: Both clamping plates (8) are glued with anti-slip pads on the side near the molding sand box (2). The core-making box (1) has a slot on the side away from the vibration generator (5) that matches the molding sand box (2). The molding sand box (2) has handles symmetrically fixed on the side facing the slot.

5. The core-making equipment for sand casting according to claim 1, characterized in that: The output rod of the servo cylinder (12) is fixed with a connecting plate (14) on its bottom surface. The bottom surface of the connecting plate (14) is symmetrically fixed with a limiting plate (16). A fixing block (15) is sleeved between the two limiting plates (16), and the bottom surface of the fixing block (15) is fixed to the top surface of the pressure plate (11). A fixing frame (17) is slidably sleeved on the outer side of the two limiting plates (16). A sliding rod (18) is slidably sleeved on the outer side of the two fixing frames (17), and the inner side of the sliding rod (18) is fixed on the outer wall of the limiting plate (16). A spring (19) is sleeved on the sliding rod (18) on the outer side of each fixing frame (17), and both ends of the spring (19) are fixed on the sliding rod (18) and the fixing frame (17) respectively.

6. The core-making equipment for sand casting according to claim 5, characterized in that: The top surface of the connecting plate (14) is symmetrically fixed with limit rods (13), and both limit rods (13) are slidably inserted into the support frame (20) on both sides of the servo cylinder (12).

7. The core-making equipment for sand casting according to claim 5, characterized in that: Both of the fixed frames (17) are configured as U-shaped and placed horizontally, and both of the slide rods (18) are configured as T-shaped and placed horizontally. The length of each slide rod (18) is greater than the length of the fixed frame (17).

8. The core-making equipment for sand casting according to claim 5, characterized in that: The support frame (20) is configured as an inverted U-shape that cooperates with the core-making box (1), the fixing block (15) is configured as a T-shape, and the two limiting plates (16) are both configured as L-shapes that cooperate with the fixing block (15).

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