Positioning and pressing device for precoated sand shell mold casting

Abstract

The utility model discloses a positioning and pressing device for precoated sand shell mold casting, which relates to the technical field of casting, and comprises an upper die holder and a lower die holder, the left side and the right side of the upper die holder are fixedly connected with positioning seats, the left side and the right side of the lower die holder are respectively provided with two groups of positioning plug-ins matched with the positioning seats, each positioning plug-in comprises a plug pin, and the plug pins are inserted into the positioning seats. The positioning seat is provided with an inserting hole corresponding to the inserting pin, the inserting pin can be inserted into the inserting hole to achieve positioning between the upper die seat and the lower die seat, the left side and the right side of the lower die seat are fixedly connected with positioning rods penetrating through the positioning seat, and the top ends of the positioning rods are provided with pressing assemblies pressing the upper die seat. According to the utility model, the problem of dislocation after installation is effectively prevented by means of positioning, fixing, pressing and the like, so that the upper die holder and the lower die holder are tightly connected, the vibration or impact in the casting process is resisted, the displacement after die assembly is prevented, the size error of a casting part is reduced, and the yield and the process reliability are obviously improved.

Description

A positioning and clamping device for coated sand shell casting Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a positioning and clamping device for coated sand shell casting. Background Technology

[0002] Coated sand shell casting is a widely used process for precision casting. It utilizes the high-temperature curing properties of coated sand to obtain dimensionally stable castings. Its core lies in the use of high-precision molds for mold closing and ensuring the stability of the cavity dimensions, thereby obtaining castings that meet tolerance requirements. The positioning accuracy and clamping reliability of the mold directly determine the dimensional accuracy and surface quality of the casting. Especially for complex thin-walled castings, even minor mold misalignment or displacement can lead to burrs, shrinkage porosity, or even complete scrap.

[0003] However, traditional molds do not use a fixed method after mold closing; instead, they rely on their own counterweights for clamping. After placement, misalignment can easily occur between the two casting boxes. Furthermore, the lack of clamping can lead to gaps at the joints after casting, allowing the casting liquid to leak out. Dimensional errors caused by mold closing deviations can affect the casting yield and production efficiency. Summary of the Invention

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a positioning and clamping device for coated sand shell casting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A positioning and clamping device for coated sand shell casting includes an upper mold base and a lower mold base. Positioning seats are fixedly connected to both sides of the upper mold base. Two sets of positioning plugs matching the positioning seats are respectively provided on the left and right sides of the lower mold base. The positioning plugs include pins. The positioning seats have holes corresponding to the pins. The pins can be inserted into the holes to achieve positioning between the upper mold base and the lower mold base.

[0007] The lower mold base has positioning rods fixedly connected to its left and right sides, which pass through the positioning base. The top of the positioning rods is provided with a clamping component for pressing the upper mold base.

[0008] Preferably, the bottom of the positioning seat is fixedly connected with a double-sided toothed plate, and the top of the positioning seat is provided with a positioning hole through which the double-sided toothed plate can pass, and the top end of the positioning rod can pass through the positioning hole to achieve positioning.

[0009] Preferably, the positioning plug includes a rotating shaft rotatably disposed on the side of the lower mold base, on which a gear and a swing plate are respectively fixedly sleeved. The gear meshes with the double-sided gear plates, and a sleeve is fixedly connected to the swing plate. The pin can pass through the sleeve and slide with it.

[0010] Preferably, a slip ring is slidably provided inside the sleeve, the pin is fixedly connected to the inner ring of the slip ring, and a spring is fixedly connected between the side of the slip ring and the sleeve, the spring being sleeved on the outside of the pin.

[0011] Preferably, the number of teeth on the double-sided toothed plate is greater than half the number of teeth on the gear, and when the upper mold base and the lower mold base are in contact, the pin is in a horizontal state and inserted into the insertion hole.

[0012] Preferably, the clamping assembly includes a screw rotatably disposed at the top of the positioning rod, a threaded sleeve is threaded onto the screw, a connecting rod is hinged to the outer wall of the threaded sleeve, and a clamping plate is hinged to the end of the connecting rod away from the threaded sleeve.

[0013] Preferably, a limiting plate is fixedly connected to the top end of the positioning rod, and the end of the clamping plate away from the connecting rod is hinged inside the limiting plate by a shaft pin. The threaded sleeve fits against the inner wall of the limiting plate and slides with it.

[0014] Preferably, the clamping plate clamps the upper mold base when it is in a horizontal state, and the clamping plate can pass through the positioning hole when it is in a vertical state.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this application, a positioning rod and a positioning hole are used for initial positioning. When the mold is closed, the positioning rod of the lower mold base is inserted into the positioning hole for quick alignment. During the mold closing process, the meshing transmission between the gear and the double-sided toothed plate drives the swing plate through the rotating shaft to drive the pin to insert into the insertion hole, so as to realize the synchronous completion of positioning and locking, achieve high-precision alignment of the upper mold base and the lower mold base, and effectively reduce the dimensional error of the casting caused by the mold closing deviation.

[0017] 2. In this application, the rotating screw drives the screw sleeve to move downward, and drives the clamping plate to horizontally press the upper mold base through the connecting rod, resisting vibration or impact during the casting process and preventing displacement after mold closing. Attached Figure Description

[0018] Figure 1 is a three-dimensional structural schematic diagram of a positioning and clamping device for coated sand shell casting proposed in this utility model.

[0019] Figure 2 is a schematic diagram of the positioning seat structure of a positioning and clamping device for a coated sand shell casting proposed in this utility model.

[0020] Figure 3 is a schematic diagram of the positioning plug structure of a positioning and clamping device for a coated sand shell casting proposed in this utility model.

[0021] Figure 4 is a partial cross-sectional view of the positioning and clamping device for coated sand shell casting proposed in this utility model.

[0022] Figure 5 is an enlarged schematic diagram of point A in Figure 4 of the positioning and clamping device for coated sand shell casting proposed in this utility model;

[0023] Figure 6 is a schematic diagram of the clamping component structure of a positioning and clamping device for coated sand shell casting proposed in this utility model.

[0024] Legend: 100, Upper mold base; 200, Lower mold base; 300, Positioning seat; 301, Insertion hole; 302, Double-sided toothed plate; 303, Positioning hole; 400, Positioning insert; 401, Pin; 402, Rotating shaft; 403, Gear; 404, Swing plate; 405, Sleeve; 406, Slip ring; 407, Spring; 500, Positioning rod; 600, Clamping assembly; 601, Screw; 602, Screw sleeve; 603, Connecting rod; 604, Clamping plate; 605, Limiting plate. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] As shown in Figures 1-6, this utility model provides a positioning and clamping device for coated sand shell casting, including an upper mold base 100 and a lower mold base 200. Positioning seats 300 are fixedly connected to both the left and right sides of the upper mold base 100. Two sets of positioning plugs 400 matching the positioning seats 300 are respectively provided on the left and right sides of the lower mold base 200. The positioning plug 400 includes a pin 401. The positioning seat 300 has a corresponding insertion hole 301. The pin 401 can be inserted into the insertion hole 301 to achieve positioning between the upper mold base 100 and the lower mold base 200.

[0028] The lower mold base 200 has positioning rods 500 fixedly connected to the left and right sides, which pass through the positioning base 300. The top of the positioning rods 500 is provided with a pressing component 600 for pressing the upper mold base 100.

[0029] In this embodiment, the bottom of the positioning seat 300 is fixedly connected with a double-sided toothed plate 302, and the top of the positioning seat 300 is provided with a positioning hole 303 through which the double-sided toothed plate can pass. The top of the positioning rod 500 can pass through the positioning hole 303 to achieve positioning.

[0030] Specifically, during mold closing, the positioning rods 500 on both sides of the lower mold base 200 can be aligned and inserted into the positioning holes 303 on both sides of the positioning seats 300 of the upper mold base 100 to complete the initial positioning and reduce mold closing misalignment.

[0031] In this embodiment, the positioning plug 400 includes a rotating shaft 402 rotatably disposed on the side of the lower mold base 200. A gear 403 and a swing plate 404 are respectively fixedly sleeved on the rotating shaft 402. The gear 403 meshes with the double-sided toothed plates 302. A sleeve 405 is fixedly connected to the swing plate 404. A pin 401 can pass through the sleeve 405 and slide with it. The number of teeth on the double-sided toothed plates 302 is greater than half the number of teeth on the gear 403. When the upper mold base 100 and the lower mold base 200 are in contact, the pin 401 is in a horizontal state and inserted into the insertion hole 301.

[0032] Specifically, during mold closing, the double-sided toothed plates 302 on the side of the upper mold base 100 contact and engage with the gear 403 on the side of the lower mold base 200, causing the gear 403 to rotate and drive the rotating shaft 402 to swing the swing plate 404. The swing plate 404 pushes the pin 401 to be horizontally inserted into the insertion hole 301, thereby connecting the upper mold base 100 and the lower mold base 200.

[0033] In this embodiment, a slip ring 406 is slidably provided inside the sleeve 405, and a pin 401 is fixedly connected to the inner ring of the slip ring 406. A spring 407 is fixedly connected between the side of the slip ring 406 and the sleeve 405, and the spring 407 is sleeved on the outside of the pin 401.

[0034] Specifically, after the mold is closed, the elastic force of the spring 407 acts on the slip ring 406, so that the spring 407 maintains a constant pressure on the pin 401, so that the pin 401 is stably inserted into the insertion hole 301. When the mold is opened, the pin 401 is pulled so that it can be removed from the insertion hole 301, thus avoiding the pin 401 from getting stuck.

[0035] In this embodiment, the clamping assembly 600 includes a screw 601 rotatably disposed at the top of the positioning rod 500, a screw sleeve 602 threadedly connected to the screw 601, a connecting rod 603 hingedly mounted on the outer wall of the screw sleeve 602, and a clamping plate 604 hinged to the end of the connecting rod 603 away from the screw sleeve 602.

[0036] Specifically, the rotating screw 601 drives the screw sleeve 602 to move up and down. The screw sleeve 602 drives the clamping plate 604 to rotate around the limiting plate 605 through the connecting rod 603. When the clamping plate 604 is horizontal, it clamps the upper mold base 100 and releases when it is vertical. It is pressed on the upper mold base 100 and the positioning seat 300 by the pressure plate, so as to achieve the clamping between the upper mold base 100 and the lower mold base 200 and ensure that the upper mold base 100 and the lower mold base 200 will not easily move.

[0037] In this embodiment, the top end of the positioning rod 500 is fixedly connected to the limiting plate 605, and the end of the pressing plate 604 away from the connecting rod 603 is hinged in the limiting plate 605 by a shaft pin. The threaded sleeve 602 fits against the inner wall of the limiting plate 605 and slides with it.

[0038] Specifically, the clamping plate 604 is hinged to the limiting plate 605 by a shaft pin. The screw 601 drives the screw sleeve 602 to slide. The screw sleeve 602 moves along the inner wall of the limiting plate 605 to avoid deflection. The limiting plate 605 constrains the movement trajectory of the clamping plate 604.

[0039] In this embodiment, when the clamping plate 604 is in a horizontal state, it clamps the upper mold base 100; when the clamping plate 604 is in a vertical state, it can pass through the positioning hole 303.

[0040] Specifically, while the clamping plate 604 is clamping, it can pass through the positioning hole 303 when the clamping plate 604 is retracted, thus avoiding interference with other components.

[0041] How to use and how to work this device:

[0042] When the device is in use, the positioning rod 500 on the side of the lower mold base 200 is first inserted into the positioning hole 303 of the positioning seat 300 on the side of the upper mold base 100 to achieve initial positioning. During this process, the gear 403 meshes with the double-sided toothed plate 302. As the mold is closed, the gear 403 drives the rotating shaft 402 to rotate under the action of the double-sided toothed plate 302. The rotating shaft 402 drives the swing plate 404 to rotate. The swing plate 404 pushes the pin 401 to insert into the insertion hole 301 to achieve the connection between the upper mold base 100 and the lower mold base 200. Finally, the rotating screw 601 drives the screw sleeve 602 to move down, and the connecting rod 603 drives the clamping plate 604 to horizontally clamp the upper mold base 100 to resist vibration or impact during the casting process and prevent displacement after mold closing.

[0043] In summary, by using positioning, fixing, and clamping methods, misalignment after installation can be effectively prevented, ensuring a tight connection between the upper mold base 100 and the lower mold base 200, reducing dimensional errors in castings, and significantly improving yield and process reliability.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A positioning and clamping device for coated sand shell casting, comprising an upper mold base (100) and a lower mold base (200), characterized in that: Positioning seats (300) are fixedly connected to both the left and right sides of the upper mold base (100). Two sets of positioning plugs (400) matching the positioning seats (300) are respectively provided on the left and right sides of the lower mold base (200). The positioning plugs (400) include pins (401). The positioning seats (300) are provided with insertion holes (301) corresponding to the pins (401). The pins (401) can be inserted into the insertion holes (301) to achieve positioning between the upper mold base (100) and the lower mold base (200). The lower mold base (200) is fixedly connected to both the left and right sides with positioning rods (500) passing through the positioning seats (300). The top of the positioning rods (500) is provided with a pressing component (600) for pressing the upper mold base (100).

2. The positioning and clamping device for coated sand shell casting according to claim 1, characterized in that: The bottom of the positioning seat (300) is fixedly connected with a double-sided toothed plate (302), and the top of the positioning seat (300) is provided with a positioning hole (303) through which the double-sided toothed plate can pass. The top of the positioning rod (500) can pass through the positioning hole (303) to achieve positioning.

3. The positioning and clamping device for coated sand shell casting according to claim 2, characterized in that: The positioning plug (400) includes a rotating shaft (402) rotatably disposed on the side of the lower mold base (200). A gear (403) and a swing plate (404) are respectively fixedly sleeved on the rotating shaft (402). The gear (403) meshes with the double-sided toothed plate (302). A sleeve (405) is fixedly connected to the swing plate (404). The pin (401) can pass through the sleeve (405) and slide with it.

4. The positioning and clamping device for coated sand shell casting according to claim 3, characterized in that: A slip ring (406) is slidably provided inside the sleeve (405), and the pin (401) is fixedly connected to the inner ring of the slip ring (406). A spring (407) is fixedly connected between the side of the slip ring (406) and the sleeve (405), and the spring (407) is sleeved on the outside of the pin (401).

5. A positioning and clamping device for coated sand shell casting according to claim 3, characterized in that: The number of teeth on the double-sided toothed plate (302) is greater than half the number of teeth on the gear (403). When the upper mold base (100) and the lower mold base (200) are in contact, the pin (401) is in a horizontal state and inserted into the insertion hole (301).

6. A positioning and clamping device for coated sand shell casting according to claim 2, characterized in that: The clamping assembly (600) includes a screw (601) rotatably disposed at the top of the positioning rod (500), a threaded sleeve (602) is threaded onto the screw (601), a connecting rod (603) is hinged to the outer wall of the threaded sleeve (602), and a clamping plate (604) is hinged to the end of the connecting rod (603) away from the threaded sleeve (602).

7. A positioning and clamping device for coated sand shell casting according to claim 6, characterized in that: The top end of the positioning rod (500) is fixedly connected to a limiting plate (605), and the end of the clamping plate (604) away from the connecting rod (603) is hinged in the limiting plate (605) by a shaft pin. The threaded sleeve (602) fits against the inner wall of the limiting plate (605) and slides with it.

8. A positioning and clamping device for coated sand shell casting according to claim 7, characterized in that: When the clamping plate (604) is in a horizontal state, it clamps the upper mold base (100). When the clamping plate (604) is in a vertical state, it can pass through the positioning hole (303).

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