Segmented automatic core-pulling structure of shell lost mold

Abstract

The application discloses a segmented automatic core-pulling structure of a shell lost foam, which comprises a lower mold and an upper mold, the upper mold comprises a box body, a telescopic cylinder, a first core-pulling block, a first forming block, a second forming block and a pull rod, the telescopic cylinder is vertically arranged on the top of the box body, the telescopic end of the telescopic cylinder penetrates through the second core-pulling block and is fixedly connected with the first core-pulling block, a plurality of pull rods are fixedly connected with the top of the first core-pulling block and used for pulling the second core-pulling block, and the second core-pulling block is provided with an opening through which the pull rod penetrates, the first forming block and the second forming block are both multiple and are arranged in a ring shape with the first core-pulling block and the second core-pulling block as the center. The two core-pulling blocks are linked to drive two groups of forming blocks to shrink or expand, the two-segment segmented core-pulling is convenient for demolding, meanwhile, the core-pulling blocks are linked, the stability of core-pulling is ensured, and the white mold forming effect is better.

Description

Technical Field

[0001] This application relates to the field of lost foam technology, and in particular to a segmented automatic core-pulling structure for lost foam shells. Background Technology

[0002] The white model in lost foam casting is a type of mold made of foamed plastic, containing countless tiny pores. This white model is characterized by its lightweight nature, non-interconnected pores, and its heat and water insulation properties. After being coated with a refractory coating and dried to remove moisture, the white model is embedded in dry quartz sand and vibrated on a vibratory molding table. Under specific conditions, molten metal is poured in. During the pouring process, the foamed white model melts and disappears, and the disappeared portion is filled with molten metal. After the molten metal cools, it becomes a casting identical to the white model. The quality of the white model has a significant impact on the quality of the final product, potentially up to 80%, directly affecting the quality of the final cast product.

[0003] An electric motor housing is a metal casing used to protect the internal parts and circuitry of an electric motor. It is typically made of materials such as cast iron, aluminum alloy, or steel plate. During the manufacturing of the white mold for the electric motor housing, due to the complexity of the internal structure, it is necessary to retract and inwardly engage the movable blocks to avoid damaging the white mold. Since the movable blocks are arranged in a ring, simultaneous retraction is not possible; therefore, segmented core pulling is required. Existing segmented core pulling methods use two sets of cylinders to drive two batches of movable blocks backward, resulting in higher costs and inconsistent core pulling continuity.

[0004] Therefore, a live block segmented core-pulling mechanism combined with an automatic core-pulling structure is needed to solve or alleviate the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a segmented automatic core-pulling structure for lost foam casting of shells in order to solve the above problems. It adopts a two-stage batch release and release of movable blocks to facilitate demolding, and at the same time, the movable blocks are linked to complete the automatic core pulling, thus ensuring the stability of core pulling and better white mold forming effect.

[0006] This application achieves the above objectives through the following technical solutions:

[0007] A segmented automatic core-pulling structure for lost foam casting includes a lower mold and an upper mold. The upper mold includes a housing, a telescopic cylinder, a first core-pulling block, a first forming block, a second forming block, and pull rods. An axially vertical telescopic cylinder is installed at the top of the housing. The telescopic end of the cylinder passes through the second core-pulling block and is fixedly connected to the first core-pulling block. Multiple pull rods are fixedly connected to the top of the first core-pulling block for pulling the second core-pulling block. The second core-pulling block has openings for the pull rods to pass through. Both the first and second forming blocks have multiple pull rods. Furthermore, the first and second core-pulling blocks are arranged in a ring around the first and second core-pulling blocks. The tops of the first and second core-pulling blocks are connected to the housing via guide components. The first and second core-pulling blocks are configured to be horizontally offset along the guide components. Each first core-pulling block is connected to the first core-pulling block via a guide rail assembly, and each second core-pulling block is connected to the second core-pulling block via a guide rail assembly. The first and second core-pulling blocks are configured to be horizontally offset by the guide rail assembly during lifting and lowering.

[0008] Preferably, the first core-pulling block has four first inclined portions, each of which has an inwardly inclined surface from high to low. There are four first forming blocks, and each first forming block has a second inclined portion, the second of which has an inwardly inclined surface from high to low to match the first inclined portion. The four first inclined portions and the four second inclined portions are connected one by one through a guide rail assembly. The second core-pulling block has four third inclined portions, and there is a receiving space between the four third inclined portions to receive the first core-pulling block. The four third inclined portions have an inwardly inclined surface from high to low to low to match the third inclined portion. There are four second forming blocks, and each second forming block has a fourth inclined portion, the fourth of which has an inwardly inclined surface from high to low to match the third inclined portion. The four third inclined portions and the four fourth inclined portions are connected one by one through a guide rail assembly.

[0009] Preferably, the guide assembly includes a mounting base, a guide post, a first wear-resistant block, a second wear-resistant block, and a guide sleeve. A first wear-resistant block is fixedly disposed on the top of each first molded movable block, and a guide sleeve is slidably connected to each first wear-resistant block. A second wear-resistant block is fixedly disposed on the top of each second molded movable block, and a guide post is slidably connected to each second wear-resistant block. A mounting base for connecting with the guide post and the guide sleeve is fixedly connected to the housing.

[0010] Preferably, the guide posts are arranged vertically, and the top of the second core-pulling block is fixedly connected with a number of connecting blocks equal to the number of guide posts. The connecting blocks are connected to the guide posts one by one through the guide rail assembly, and the guide posts are configured to guide the vertical lifting and lowering of the connecting blocks through the guide rail assembly.

[0011] Preferably, the guide rail assembly includes a slider and a slide rail, a guide ridge is fixedly provided on the slider for sliding engagement with the slide rail, and the slide rail has a guide groove adapted to the guide ridge.

[0012] Preferably, the slider and the slide rail are of the same length.

[0013] Preferably, the first forming block and the second forming block are distributed alternately, the outer surfaces of the first forming block and the second forming block are both arc-shaped, and the outer circumference of the first forming block is smaller than the circumference of the second forming block.

[0014] Preferably, the first forming block and the first wear-resistant block are integral structures, the second forming block and the second wear-resistant block are integral structures, and the second core-pulling block and the connecting block are integral structures.

[0015] Preferably, the mounting base is provided with a recess for accommodating the guide post and the guide sleeve, and the guide post and the guide sleeve are fastened in the recess by fasteners.

[0016] Compared to existing technologies, this application uses two core-pulling blocks linked together to drive the two sets of molding blocks to shrink or expand. This two-stage segmented core-pulling facilitates demolding, while the linkage between the blocks ensures the stability of the core-pulling and results in better white mold forming. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 This is a schematic diagram of the upper mold structure of this application;

[0020] Figure 3 This is a schematic diagram of the mounting base structure inside the housing of this application;

[0021] Figure 4 This is a cross-sectional structural diagram of the upper mold in this application;

[0022] Figure 5 This is a schematic diagram of the structure of the live block in this application;

[0023] Figure 6 This is a schematic diagram of the structure of the first and second core-pulling blocks in this application;

[0024] Figure 7 This is a schematic diagram of the first core-pulling block structure of this application;

[0025] Figure 8 This is a schematic diagram of the second core-pulling block structure of this application;

[0026] Figure 9 This is a schematic diagram of the structure of the first and second molded blocks of this application;

[0027] Figure 10 This is a schematic diagram of the structure of the first and second wear-resistant blocks in this application.

[0028] The annotations in the attached figures are explained as follows:

[0029] 1. Lower mold; 2. Upper mold; 3. Box body; 4. Telescopic cylinder; 5. First core-pulling block; 501. First inclined part; 6. Second core-pulling block; 601. Third inclined part; 7. First forming block; 701. Second inclined part; 8. Second forming block; 801. Fourth inclined part; 9. Mounting base; 10. Slider; 11. Slide rail; 12. Guide post; 13. Tie rod; 14. First wear-resistant block; 15. Second wear-resistant block; 16. Guide sleeve; 17. Connecting block. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 This description is provided for the convenience of describing this application and for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] like Figure 1-10As shown, a segmented automatic core-pulling structure for lost foam casting includes a lower mold 1 and an upper mold 2. The upper mold 2 includes a housing 3, a telescopic cylinder 4, a first core-pulling block 5, a first forming block 7, a second forming block 8, and pull rods 13. The top of the housing 3 is provided with an axially vertical telescopic cylinder 4. The telescopic end of the telescopic cylinder 4 passes through the second core-pulling block 6 and is fixedly connected to the first core-pulling block 5. Multiple pull rods 13 are fixedly connected to the top of the first core-pulling block 5 for pulling the second core-pulling block 6. The second core-pulling block 6 has openings for the pull rods 13 to pass through, allowing the pull rods 13 to slide within the openings. The first forming block... There are multiple first forming blocks 7 and second forming blocks 8, arranged in a ring around the first core-pulling block 5 and the second core-pulling block 6. The tops of the first forming blocks 7 and the second forming blocks 8 are connected to the housing 3 through guide components. The first forming blocks 7 and the second forming blocks 8 are configured to be horizontally offset along the guide components. Each first forming block 7 is connected to the first core-pulling block 5 through a guide rail assembly, and each second forming block 8 is connected to the second core-pulling block 6 through a guide rail assembly. The first core-pulling blocks 5 and the second core-pulling blocks 6 are configured to be horizontally offset by the guide rail assembly when raised or lowered.

[0033] Specifically, the telescopic end of the telescopic cylinder 4 passes through the second core-pulling block 6 and is fixedly connected to the first core-pulling block 5 so that the telescopic cylinder 4 adjusts the height of the first core-pulling block 5 first when telescopically extending or retracting; the first core-pulling block 5 and the second core-pulling block 6 are connected by a pull rod 13 passing through the second core-pulling block 6, so that when the first core-pulling block 5 descends, it pulls the second core-pulling block 6 through the pull rod 13, and when the first core-pulling block 5 rises, it pushes the second core-pulling block 6 to rise by contacting it; the first forming block 7 and the second forming block 8 are both molds that make up the white mold of the motor housing; the tops of the first forming block 7 and the second forming block 8 are connected to the housing 3 through a guide assembly, and the first forming block 7 and the second forming block 8 are configured to be horizontally offset along the guide assembly so that the first forming block 7 and the second forming block 8 can be horizontally offset inward to retract or expand under the power of the lifting and lowering of the first core-pulling block 5 and the second core-pulling block 6.

[0034] Preferably, the first core-pulling block 5 has four first inclined portions 501, each with an inwardly inclined surface from high to low. There are four first forming blocks 7, and each first forming block 7 has a second inclined portion 701, the inwardly inclined surface of which matches the first inclined portion 501. The four first inclined portions 501 and the four second inclined portions 701 are connected one by one via a guide rail assembly. The second core-pulling block 6 has four third inclined portions 601. There is a receiving space between the four third inclined portions 601 to accommodate the first core-pulling block 5 so that the first core-pulling block 5 has room to rise and fall. The inclined surfaces of the four third inclined portions 601 slope inward from high to low. There are four second forming blocks 8, and each second forming block 8 has a fourth inclined portion 801. The inclined surfaces of the fourth inclined portions 801 slope inward from high to low and are adapted to the third inclined portions 601. The four third inclined portions 601 and the four fourth inclined portions 801 are connected one by one through the guide rail assembly.

[0035] Specifically, when the first core-pulling block 5 and the second core-pulling block 6 rise, they are pulled inward by the inclined surfaces and guide rail assembly of the first inclined portion 501 and the third inclined portion 601. When the first core-pulling block 5 and the second core-pulling block 6 fall, they are pushed outward by the inclined surfaces and guide rail assembly of the first inclined portion 501 and the third inclined portion 601, thereby causing the first forming block 7 and the second forming block 8 to move horizontally to form contraction and expansion.

[0036] Preferably, the guide assembly includes a mounting base 9, a guide post 12, a first wear-resistant block 14, a second wear-resistant block 15, and a guide sleeve 16. The top of each first molded movable block 7 is fixedly provided with a first wear-resistant block 14, and each first wear-resistant block 14 is slidably connected to a guide sleeve 16. The top of each second molded movable block 8 is fixedly provided with a second wear-resistant block 15, and each second wear-resistant block 15 is slidably connected to a guide post 12. The housing 3 is fixedly connected with a mounting base 9 for connecting with the guide post 12 and the guide sleeve 16.

[0037] Specifically, each first forming block 7 has a first wear-resistant block 14 fixedly disposed on its top, and each first wear-resistant block 14 is slidably connected to a guide sleeve 16. When the first forming block 7 shifts and contracts or expands, the first wear-resistant block 14 shifts accordingly and then slides on the guide sleeve 16. The guide sleeve 16 maintains the offset direction of the first wear-resistant block 14, thereby maintaining the stability of the first forming block 7. Each second forming block 8 has a second wear-resistant block 15 fixedly disposed on its top, and each second wear-resistant block 15 is slidably connected to a guide post 12. The bottom of the guide post 12 has a guide groove adapted to the second wear-resistant block 15. When the second forming block 8 shifts and contracts or expands, the second wear-resistant block 15 shifts accordingly and then slides on the guide post 12. The guide post 12 maintains the offset direction of the second wear-resistant block 15, thereby maintaining the stability of the second forming block 8.

[0038] Preferably, the guide post 12 is arranged in a vertical direction, and the top of the second core-pulling block 6 is fixedly connected with a number of connecting blocks 17 equal to the number of guide posts 12. The connecting blocks 17 are connected to the guide posts 12 one by one through the guide rail assembly, and the guide post 12 is configured to guide the vertical lifting and lowering of the connecting blocks 17 through the guide rail assembly.

[0039] Specifically, when the second core-pulling block 6 is raised or lowered, the connecting block 17 is raised or lowered accordingly. Then, the connecting block 17 drives the guide rail assembly to slide accordingly, thereby maintaining the stability of the raising and lowering of the second core-pulling block 6.

[0040] Preferably, the guide rail assembly includes a slider 10 and a slide rail 11. A guide ridge is fixedly provided on the slider 10 for sliding engagement with the slide rail 11, and the slide rail 11 has a guide groove adapted to the guide ridge.

[0041] Specifically, the slider 10 and the slide rail 11 are existing structures, such as the cross section of the guide ridge on the slider 10 being trapezoidal, thereby maintaining the linear movement between the slider 10 and the slide rail 11.

[0042] Preferably, the slider 10 and the slide rail 11 are of the same length so that the slider 10 and the slide rail 11 have a longer guide length.

[0043] Preferably, the first forming block 7 and the second forming block 8 are distributed in an alternating manner, the outer surfaces of the first forming block 7 and the second forming block 8 are both arc-shaped, and the outer circumference of the first forming block 7 is smaller than the circumference of the second forming block 8.

[0044] Specifically, the outer circumference of the first forming block 7 is smaller than the circumference of the second forming block 8. The first forming block 7 is first driven to shrink by the first core-pulling block 5 and can make way when the second forming block 8 shrinks.

[0045] Preferably, the first forming block 7 and the first wear-resistant block 14 are integral structures, the second forming block 8 and the second wear-resistant block 15 are integral structures, and the second core-pulling block 6 and the connecting block 17 are integral structures. The integral structure ensures the stability of the structure.

[0046] Preferably, the mounting base 9 is provided with a recess to accommodate the guide post 12 and the guide sleeve 16. The guide post 12 and the guide sleeve 16 are fastened in the recess by fasteners, so that the guide post 12 and the guide sleeve 16 can be stably guided.

[0047] In the above structure, when core pulling is required, the telescopic cylinder 4 is activated to retract, firstly moving the first core-pulling block 5 upward. At this time, the first core-pulling block 5 drives the first forming block 7 to move horizontally via the slide rail assembly set on the first inclined part 501, causing all the first forming blocks 7 to synchronously offset and retract. When the first core-pulling block 5 continues to move upward, it contacts the second core-pulling block 6. Then, the second core-pulling block 6 follows the first core-pulling block 5 upward. At this time, the second core-pulling block 6 drives the second forming block 8 to move horizontally via the slide rail assembly set on the third inclined part 601, causing all the second forming blocks 8 to synchronously offset and retract. Thus, the lower mold 1 and the upper mold 2 can open, and the white mold remains on the lower mold 1. After the lower mold 1 and the upper mold 2 close, the... When the telescopic cylinder 4 extends, it first moves the first core-pulling block 5 downward. At this time, the first core-pulling block 5 moves the first forming block 7 horizontally through the slide rail assembly, causing all the first forming blocks 7 to shift and expand synchronously. When the first core-pulling block 5 continues to move downward, it moves the second core-pulling block 6 downward through the pull rod 13. At this time, the second core-pulling block 6 moves the second forming block 8 horizontally through the slide rail assembly, causing all the second forming blocks 8 to shift and expand synchronously. Then, the first forming blocks 7 and the second forming blocks 8 form a complete mold again, ready for the production of the white mold. Therefore, by using a linkage automatic method, the first forming blocks 7 and the second forming blocks 8 are pulled in segments, ensuring the stability of the core pulling and improving the forming effect of the white mold.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A segmented automatic core-pulling structure for lost foam casting, comprising a lower mold (1) and an upper mold (2), characterized in that: The upper mold (2) includes a box body (3), a telescopic cylinder (4), a first core-pulling block (5), a first forming block (7), a second forming block (8), and a pull rod (13). The top of the box body (3) is provided with an axially vertical telescopic cylinder (4). The telescopic end of the telescopic cylinder (4) passes through the second core-pulling block (6) and is fixedly connected to the first core-pulling block (5). The top of the first core-pulling block (5) is fixedly connected with multiple pull rods (13) for pulling the second core-pulling block (6). The second core-pulling block (6) is provided with an opening for the pull rods (13) to pass through. There are multiple first forming blocks (7) and second forming blocks (8), and the first forming block (7) and second forming block (8) are arranged in order of their number. A core-pulling block (5) and a second core-pulling block (6) are arranged in a ring around the center. The tops of the first forming block (7) and the second forming block (8) are connected to the housing (3) through a guide assembly. The first forming block (7) and the second forming block (8) are configured to be horizontally offset along the guide assembly. Each first forming block (7) is connected to the first core-pulling block (5) through a guide rail assembly. Each second forming block (8) is connected to the second core-pulling block (6) through a guide rail assembly. The first core-pulling block (5) and the second core-pulling block (6) are configured to be horizontally offset by the first forming block (7) and the second forming block (8) through the guide rail assembly when lifting.

2. The segmented automatic core-pulling structure for lost foam casting of a shell according to claim 1, characterized in that: The first core-pulling block (5) has four first inclined portions (501), the slope of each first inclined portion (501) slopes inward from high to low. There are four first forming blocks (7), and each first forming block (7) has a second inclined portion (701), the slope of the second inclined portion (701) slopes inward from high to low to match the first inclined portion (501). The four first inclined portions (501) and the four second inclined portions (701) are connected one by one through the guide rail assembly. The second core-pulling block (6) has four third inclined portions. The inclined section (601) has a receiving space between the four third inclined sections (601) to receive the first core-pulling block (5). The inclined surfaces of the four third inclined sections (601) slope inward from high to low. There are four second molding blocks (8), and each second molding block (8) has a fourth inclined section (801). The inclined surfaces of the fourth inclined sections (801) slope inward from high to low and are adapted to the third inclined sections (601). The four third inclined sections (601) and the four fourth inclined sections (801) are connected one by one through the guide rail assembly.

3. The segmented automatic core-pulling structure for lost foam casting according to claim 1, characterized in that: The guide assembly includes a mounting base (9), a guide post (12), a first wear-resistant block (14), a second wear-resistant block (15), and a guide sleeve (16). The top of each first molded block (7) is fixedly provided with a first wear-resistant block (14), and each first wear-resistant block (14) is slidably connected to a guide sleeve (16). The top of each second molded block (8) is fixedly provided with a second wear-resistant block (15), and each second wear-resistant block (15) is slidably connected to a guide post (12). The housing (3) is fixedly connected with a mounting base (9) for connecting with the guide post (12) and the guide sleeve (16).

4. The segmented automatic core-pulling structure for lost foam casting of a shell according to claim 3, characterized in that: The guide post (12) is arranged in a vertical direction. The top of the second core-pulling block (6) is fixedly connected with a number of connecting blocks (17) equal to the number of guide posts (12). The connecting blocks (17) and the guide posts (12) are connected one by one through the guide rail assembly. The guide post (12) is configured to guide the vertical lifting and lowering of the connecting blocks (17) through the guide rail assembly.

5. A segmented automatic core-pulling structure for lost foam casting according to any one of claims 1-4, characterized in that: The guide rail assembly includes a slider (10) and a slide rail (11). A guide ridge is fixedly provided on the slider (10) for sliding engagement with the slide rail (11), and the slide rail (11) has a guide groove adapted to the guide ridge.

6. The segmented automatic core-pulling structure for lost foam casting according to claim 5, characterized in that: The slider (10) and the slide rail (11) have the same length.

7. The segmented automatic core-pulling structure for lost foam casting of a shell according to claim 1, characterized in that: The first forming block (7) and the second forming block (8) are interspersed. The outer surfaces of the first forming block (7) and the second forming block (8) are both arc-shaped, and the outer circumference of the first forming block (7) is smaller than the circumference of the second forming block (8).

8. The segmented automatic core-pulling structure for lost foam casting according to claim 4, characterized in that: The first forming block (7) and the first wear-resistant block (14) are an integral structure, the second forming block (8) and the second wear-resistant block (15) are an integral structure, and the second core-pulling block (6) and the connecting block (17) are an integral structure.

9. The segmented automatic core-pulling structure for lost foam casting of a shell according to claim 3, characterized in that: The mounting base (9) is provided with a recess for accommodating the guide post (12) and the guide sleeve (16), and the guide post (12) and the guide sleeve (16) are fastened in the recess by fasteners.

Images