Gravity mold core pulling device

Abstract

The utility model discloses a gravity mold core pulling device, including lower mould, the upper mould of setting in the upper of lower mould, the aluminum liquid groove of setting in one end of lower mould and the product body of forming in mould cavity, its characterized in that: one end of product body forms and has product part hole, one end of lower mould is provided with core pulling mechanism, the core pulling mechanism includes the drive source of setting in one end of lower mould, the one end movable of mould cavity on lower mould is provided with core pulling device, and one end of core pulling device is provided with the core pulling shaft of adapting with product part hole. The gravity mold core pulling device, through the core pulling mechanism of setting cooperation guide rod, positioning block, limit block, first fixed frame, not only realized automatic core pulling, and ensured the coaxiality and stability of core pulling shaft movement, thereby significantly improved the size accuracy and surface finish of casting inner cavity, greatly shortened the core pulling time, and improved overall production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field, especially a gravity mould core pulling device. BACKGROUND

[0002] In the traditional gravity casting production, for the part with complex inner cavity structure such as deep hole and thread, the core pulling (core pulling) usually depends on manual operation or simple tool after the mould opening, and the manual core pulling not only needs the operator to work in the high temperature environment, but also its operation precision and stability depend on the personal experience and proficiency of the operator, therefore, this mode inevitably brings a series of problems: because the manual operation is slow and the step is complicated, the production cycle is significantly lengthened, and the efficiency is low, at the same time, the manual core pulling process is easy to deflect, causes the problems such as the poor size precision of the inner cavity of casting, deformation, in addition, the casting or mould is easy to be damaged in the core pulling process, causes the high scrap rate, more importantly, the manual operation in the high temperature environment itself has the great safety hidden danger.

[0003] Therefore, it is necessary to provide a gravity mould core pulling device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model mainly aims at providing a gravity mould core pulling device, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A gravity mould core pulling device, comprising a lower mould, an upper mould arranged above the lower mould, an aluminum liquid tank arranged at one end of the lower mould, and a product body formed in a mould cavity, one end of the product body is formed with a product part hole, one end of the lower mould is provided with a core pulling mechanism, the core pulling mechanism comprises a driving source arranged at one end of the lower mould, one end of the mould cavity on the lower mould is movably provided with a core pulling device, one end of the core pulling device is provided with a core pulling shaft matched with the product part hole, and an output shaft of the driving source is connected with one end of the core pulling device, so that the driving source drives the core pulling shaft to displace.

[0007] One end of the core pulling device is provided with a connecting frame, the upper end of the connecting frame is provided with a guide rod, one end of the driving source is bolted with a first fixing frame, one side of the upper end of the first fixing frame is provided with a guide hole corresponding to the guide rod, the end of the guide rod away from the connecting frame is movably guided with the guide hole, a pair of limiting blocks are arranged on the guide rod, and one end of the lower mould is provided with a pair of positioning blocks corresponding to the limiting blocks, and the two limiting blocks are located between the two positioning blocks.

[0008] Preferably, the driving source is a pneumatic cylinder.

[0009] Preferably, one end of the positioning block close to the limiting block is arc-shaped, and the far end of the two limiting blocks is provided with a slope corresponding to the end of the positioning block.

[0010] Preferably, the inner wall of the guide hole is uniformly provided with a plurality of rolling balls movably arranged on the inner wall of the guide hole, and the rolling balls are in rolling cooperation with the outer wall of the guide rod.

[0011] Preferably, the first fixing frame is provided with an annular groove, an abutting ring is movably arranged in the annular groove, a spring is arranged between one side of the abutting ring and the inner wall of the annular groove, and when the spring is in a reset state, one end of the abutting ring protrudes from the side wall of the first fixing frame.

[0012] Preferably, the limiting block is in a ring structure, one side of the limiting block is provided with a slot, and the limiting block is locked on the outside of the guide rod through bolts.

[0013] Compared with the prior art, the gravity mold core pulling device has the following beneficial effects:

[0014] 1. The gravity mold core pulling device, through the cooperation of the core pulling mechanism, the guide rod, the positioning block, the limiting block and the first fixing frame, not only realizes automatic core pulling, but also ensures the coaxiality and stability of the core pulling shaft movement, thereby significantly improving the size precision and surface finish of the inner cavity of the casting, accurately controlling the core pulling timing and speed by the control system, and being linked with the casting process, greatly shortening the core pulling time and improving the overall production efficiency. Since the automatic operation replaces manual operation, not only the safety risk of high-temperature operation is eliminated, but also the damage of the casting caused by human factors is reduced, the waste rate is reduced, and the service life of the mold is prolonged.

[0015] 2. The gravity mold core pulling device, through the setting of the rolling balls, the friction between the guide rod and the inner wall of the guide hole can be reduced, and the setting of the annular groove, the abutting ring and the spring can increase the stability of the first fixing frame and the installation place of the driving source, and reduce looseness. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a structural schematic diagram of the core pulling mechanism and the lower mold in a disassembled state;

[0018] Figure 3 is a specific structural schematic diagram of the core pulling mechanism of the utility model;

[0019] Figure 4 is a structural schematic diagram of the abutting ring, the spring and the first fixing frame in a disassembled state;

[0020] Figure 5 This is a schematic diagram of the structure of the guide rod of this utility model.

[0021] In the diagram: 1. Lower mold; 2. Upper mold; 3. Aluminum liquid tank; 4. Product body; 5. Support; 6. Drive source; 7. Core pulling device; 8. Product part hole; 9. Core pulling shaft; 10. Connecting frame; 11. First fixing frame; 12. Guide rod; 13. Second fixing frame; 14. Positioning block; 15. Limiting block; 16. Guide hole; 17. Ball bearing; 18. Annular groove; 19. Abutment ring; 20. Spring; 21. Slot. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figures 1-5 As shown, a gravity mold core-pulling device includes a lower mold 1, an upper mold 2 disposed above the lower mold 1, an aluminum liquid tank 3 disposed at one end of the lower mold 1, and a product body 4 formed in the mold cavity. One end of the product body 4 is formed with a product part hole 8. One end of the lower mold 1 is provided with a core-pulling mechanism, which includes a bracket 5 disposed at one end of the lower mold 1. A drive source 6 is mounted on the bracket 5. The drive source 6 is preferably a cylinder. One end of the mold cavity on the lower mold 1 is movably provided with a core-pulling device 7. One end of the core-pulling device 7 is provided with a core-pulling shaft 9 adapted to the product part hole 8. The output shaft of the drive source 6 is connected to one end of the core-pulling device 7, so that the drive source 6 drives the core-pulling shaft 9 to move.

[0024] A connecting frame 10 is provided on one side wall of the core pulling device 7. A guide rod 12 is provided on the upper end of the connecting frame 10. A first fixing frame 11 is bolted to one end of the drive source 6. A guide hole 16 corresponding to the guide rod 12 is provided on one side of the upper end of the first fixing frame 11. The end of the guide rod 12 away from the connecting frame 10 is movably guided and cooperated with the guide hole 16. A pair of limiting blocks 15 are provided on the guide rod 12. The limiting blocks 15 are annular structures. A slot 21 is provided on one side of the limiting blocks 15. The limiting blocks 15 are locked to the outside of the guide rod 12 by bolts. A second fixing frame 13 is provided on one side of the lower mold 1. A pair of positioning blocks 14 corresponding to the limiting blocks 15 are installed on the second fixing frame 13. The two limiting blocks 15 are located between the two positioning blocks 14. The end of the positioning block 14 near the limiting block 15 is arc-shaped. The ends of the two limiting blocks 15 away from each other are provided with inclined surfaces corresponding to the ends of the positioning blocks 14.

[0025] To reduce friction, ball bearings 17 are evenly arranged around the inner wall of the guide hole 16. The ball bearings 17 are movably disposed on the inner wall of the guide hole 16 and roll in cooperation with the outer wall of the guide rod 12.

[0026] To increase the stability of the first fixing frame 11, an annular groove 18 is provided on the first fixing frame 11. An abutment ring 19 is movably provided inside the annular groove 18. A spring 20 is provided between one side of the abutment ring 19 and the inner wall of the annular groove 18. When the spring 20 is in the reset state, one end of the abutment ring 19 protrudes from the side wall of the first fixing frame 11.

[0027] It should be noted that this utility model is a gravity mold core pulling device. When in use, after the product body 4 is formed, the control drive source 6 drives the core pulling device 7 to move. The core pulling device 7 drives the core pulling shaft 9 to gradually separate from the product part hole 8. During this period, the core pulling device 7 will drive the overall displacement of the connecting frame 10 and the guide rod 12 for guidance. When one of the limiting blocks 15 abuts against the corresponding positioning block 14, the core pulling is completed, ensuring the coaxiality of the core pulling shaft 9. After the product is taken out, the drive source 6 drives the core pulling device 7 to reset. The other positioning block 14 will abut against one end of its corresponding limiting block 15, and the reset is completed.

[0028] In addition, when the first fixing bracket 11 is installed at one end of the drive source 6, it is fixed by bolts. The annular groove 18 is located around the bolt hole. When the bolt is tightened, the bolt head will squeeze the abutment ring 19, which in turn compresses the spring 20. The spring 20 generates a reverse force on the bolt head, which increases the axial pressure between the threads, thereby increasing the stability and reducing the possibility of the first fixing bracket 11 loosening due to frequent expansion and contraction.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gravity mold core-pulling device, comprising a lower mold (1), an upper mold (2) disposed above the lower mold (1), an aluminum liquid tank (3) disposed at one end of the lower mold (1), and a product body (4) formed in the mold cavity, characterized in that: One end of the product body (4) is formed with a product part hole (8), and one end of the lower mold (1) is provided with a core pulling mechanism. The core pulling mechanism includes a drive source (6) provided at one end of the lower mold (1). One end of the mold cavity on the lower mold (1) is movably provided with a core pulling device (7). One end of the core pulling device (7) is provided with a core pulling shaft (9) adapted to the product part hole (8). The output shaft of the drive source (6) is connected to one end of the core pulling device (7), so that the drive source (6) drives the core pulling shaft (9) to move. A connecting frame (10) is provided on one side wall of the core pulling device (7). A guide rod (12) is provided on the upper end of the connecting frame (10). A first fixing frame (11) is bolted to one end of the drive source (6). A guide hole (16) corresponding to the guide rod (12) is provided on one side of the upper end of the first fixing frame (11). The end of the guide rod (12) away from the connecting frame (10) is movably guided and cooperated with the guide hole (16). A pair of limiting blocks (15) are provided on the guide rod (12). A pair of positioning blocks (14) corresponding to the limiting blocks (15) are provided on one side of the lower mold (1). The two limiting blocks (15) are located between the two positioning blocks (14).

2. The gravity mold core-pulling device according to claim 1, characterized in that: The driving source (6) is a cylinder.

3. The gravity mold core-pulling device according to claim 1, characterized in that: The end of the positioning block (14) near the limiting block (15) is arc-shaped, and the ends of the two limiting blocks (15) that are far apart are provided with inclined surfaces corresponding to the ends of the positioning block (14).

4. The gravity mold core-pulling device according to claim 1, characterized in that: The inner wall of the guide hole (16) is uniformly surrounded by balls (17), which are movably disposed on the inner wall of the guide hole (16) and roll in cooperation with the outer wall of the guide rod (12).

5. The gravity mold core-pulling device according to claim 1, characterized in that: The first fixing frame (11) is provided with an annular groove (18), and an abutment ring (19) is movably provided inside the annular groove (18). A spring (20) is provided between one side of the abutment ring (19) and the inner wall of the annular groove (18), and when the spring (20) is in the reset state, one end of the abutment ring (19) protrudes out of the side wall of the first fixing frame (11).

6. The gravity mold core-pulling device according to claim 1, characterized in that: The limiting block (15) is a ring structure. A slot (21) is provided on one side of the limiting block (15), and the limiting block (15) is locked to the outside of the guide rod (12) by bolts.

Images