Sand casting mold for pump body in efficient steel casting

Abstract

The utility model discloses a sand casting mould for a pump body in an efficient steel casting, which relates to the technical field of casting moulds and comprises an upper mould and a lower mould which are matched with each other, a connecting component is arranged between the upper mould and the lower mould and comprises a pin rod, a plurality of rib plates are respectively arranged on one side of the upper mould and one side of the lower mould, and the pin rod is connected with the rib plates. The other side of the upper die and the other side of the lower die are respectively provided with buckling plates which can be buckled with each other, lantern rings are arranged at the ends of the rib plates, the pin rod penetrates through the lantern rings, a positioning seat is arranged on the lower die, and the positioning seat is provided with a telescopic assembly used for the pin rod to enter and exit from the lantern rings. Through transmission of the gear and the rack, locking of the ratchet wheel and the pawl, a rotation stopping and dislocation preventing structure and a modularized connecting assembly, rapid and accurate mold closing and positioning, reliable locking and looseness prevention, convenient demolding operation and efficient assembly line adaptation are achieved, the production efficiency and product precision of sand casting of a pump body in a steel casting are improved, and the production cost is reduced. And the labor cost and the equipment loss are reduced.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, specifically to a high-efficiency sand casting mold for an internal pump body of a cast steel part. Background Technology

[0002] In the sand casting process of pump bodies made of cast steel, the opening and closing efficiency, positioning accuracy, and ease of operation of the mold directly affect production efficiency and casting quality. Traditional sand casting molds typically use bolt connections or simple pin positioning.

[0003] Existing sand casting molds rely on manual installation or removal of bolts one by one, which is cumbersome and time-consuming. Especially in mass production, the frequent mold opening and closing process leads to low production efficiency. The simple pin positioning method cannot guarantee the precise alignment of the upper and lower molds. Assembly errors can easily lead to dimensional deviations in castings or defects such as flash and burrs, increasing subsequent processing costs.

[0004] To address the aforementioned issues, there is an urgent need to design a sand casting mold capable of rapid positioning in order to improve the production efficiency and precision of the pump body inside the cast steel parts. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency mold for sand casting of internal pump bodies in cast steel parts, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A high-efficiency sand casting mold for an internal pump body made of cast steel includes an upper mold and a lower mold that cooperate with each other. A connecting assembly is provided between the upper mold and the lower mold. The connecting assembly includes a pin. Multiple ribs are provided on one side of the upper mold and the lower mold respectively. Interlocking plates are provided on the other side of the upper mold and the lower mold respectively. The ends of the ribs are provided with collars. The pin passes through multiple collars. A positioning seat is provided on the lower mold. The positioning seat is provided with a telescopic assembly for the pin to enter and exit the collars. When the pin is inserted into the multiple collars, the upper mold and the lower mold can rotate around the pin. When the pin leaves the collars, the upper mold and the lower mold can be separated.

[0008] In the above technical solution, the pin passes through the collar to achieve hinged positioning of the upper and lower molds, reducing assembly errors and ensuring mold closing accuracy. When the pin is inserted into the collar, the upper and lower molds can rotate around the pin, which facilitates angle adjustment. When the pin is removed from the collar, the molds can be completely separated, simplifying the demolding process and improving production efficiency. The rib plate enhances the overall rigidity of the mold, and the snap-fit ​​plate further fixes the upper and lower molds, preventing displacement or deformation during the casting process.

[0009] A further improvement of the present invention is that: the telescopic component includes a sliding groove installed inside the positioning seat; there are two pins; the pins slide in cooperation with the sliding groove; one end of the pin inside the positioning seat is provided with a semi-cylindrical groove; multiple continuous toothed grooves are provided on the opposite side of the two grooves; a gear is provided in the middle of the positioning seat; and multiple toothed grooves on the same groove form a rack structure that cooperates with the gear transmission.

[0010] In the above technical solution, the gear meshes with the tooth grooves on both sides. Rotating the gear can synchronously drive the two pins to slide towards or away from each other, ensuring that the actions of the two pins are consistent and avoiding mold wear or positioning deviation caused by uneven force on a single pin. The rapid extension and retraction of the pins is achieved through gear transmission, reducing the tedious steps of manually adjusting each pin and improving the efficiency of mold opening and closing.

[0011] A further improvement of the present invention is that: the positioning seat is provided with a rotating shaft, the rotating shaft is engaged with a gear to prevent rotation, one end of the rotating shaft extends to the outside of the positioning seat, and the end of the rotating shaft extending to the outside of the positioning seat is provided with a cutting edge.

[0012] Using the above technical solution, the cutting edge (such as an internal hexagonal structure) can directly drive the rotating shaft to rotate through tools such as wrenches, converting human power into gear transmission power. This makes operation easier and allows for precise control of the pin movement distance. The rotating shaft and gear are integrated inside the positioning seat, reducing external transmission components and making the overall structure of the mold more compact, occupying less space, and suitable for automated production line layout.

[0013] A further improvement of this utility model is that: the pin is provided with an anti-rotation part, and the slide groove is provided with an anti-rotation groove.

[0014] In the above technical solution, the anti-rotation part cooperates with the anti-rotation groove to restrict the rotational freedom of the pin in the groove, ensuring that the pin slides only along the axial direction, avoiding the failure of the tooth groove and gear meshing due to the rotation of the pin, and ensuring transmission stability and positioning accuracy.

[0015] A further improvement of this utility model is that: a ratchet is provided on the rotating shaft, a pawl is hinged inside the positioning seat, and a spring for resetting the pawl is provided inside the positioning seat.

[0016] In the above technical solution, the ratchet and pawl work together to lock the shaft in one direction, preventing the gear from rotating in the opposite direction due to external forces such as vibration during the casting process. This ensures that the pin is always in the locked state, avoiding casting defects or safety accidents caused by accidental mold separation. The spring provides a restoring force for the pawl, ensuring a stable locked state. No additional manual fixing is required, thus improving operational safety.

[0017] A further improvement of this utility model is that: the positioning seat is provided with a guide groove, the pawl is provided with a lever, and the lever extends to the outside of the positioning seat.

[0018] The above technical solution allows the pawl to disengage from the ratchet by moving the outer lever, thus releasing the one-way lock and allowing the shaft to rotate in the opposite direction. This facilitates quick removal of the pin when needed (such as during the demolding stage), balancing locking reliability and operational flexibility. The external lever design allows operators to directly intervene in the locking state without disassembling the internal structure of the mold, reducing operational difficulty.

[0019] A further improvement of this utility model is that: support rods are provided at both ends of the upper mold and the lower mold respectively.

[0020] The above technical solution provides stable support for mold placement by the support rod, avoiding direct contact with the ground and thus preventing wear; the lifting hole design facilitates the lifting of the mold by a crane or robotic arm, adapts to assembly line operations, reduces the intensity of manual handling, and improves production safety.

[0021] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0022] 1. This utility model provides a high-efficiency sand casting mold for the inner pump body of cast steel parts. The hinged structure of the pin and the collar ensures that the upper and lower molds maintain stable coaxial rotation during opening and closing, avoiding the casting deviation caused by misalignment in traditional molds and ensuring the consistency of casting dimensions. The telescopic component adopts a gear and rack transmission mechanism, which drives the two pins to extend and retract synchronously through the rotating shaft. This not only makes operation simple but also realizes a two-way self-locking function, greatly reducing the difficulty and labor intensity of manual adjustment. In addition, the split design allows the pins to quickly exit the collar when demolding, facilitating the disassembly of the upper and lower molds.

[0023] 2. This utility model provides a high-efficiency mold for sand casting of internal pump bodies in cast steel parts. The cooperation between the anti-rotation part and the anti-rotation groove eliminates the risk of rack and gear meshing failure caused by the rotation of the pin, and extends the service life of the transmission components. In addition, the one-way locking and lever unlocking functions of the ratchet mechanism can prevent loosening caused by vibration during the mold locking stage, and allow reverse operation during demolding, taking into account both safety and flexibility. The overall structure is compact and highly reliable, and is suitable for high-temperature and high-pressure cast steel environments, improving the efficiency and yield of sand casting.

[0024] This utility model provides a high-efficiency mold for sand casting of internal pump bodies in cast steel parts. Through gear and rack transmission, ratchet and pawl locking, anti-rotation and anti-misalignment structure and modular connection components, it achieves rapid and accurate mold closing and positioning, reliable locking and anti-loosening, convenient demolding operation and high-efficiency production line adaptation, improves the production efficiency and product accuracy of sand casting of internal pump bodies in cast steel parts, and reduces labor costs and equipment wear. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is the left-side view of the present invention;

[0028] Figure 3 For the present utility model Figure 2 A three-dimensional cross-sectional view at point AA;

[0029] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 For the present utility model Figure 2 3D cross-sectional view at point BB;

[0031] Figure 6 For the present utility model Figure 5 Enlarged view of point B in the middle;

[0032] Figure 7 For the present utility model Figure 2 A three-dimensional cross-sectional view at point CC;

[0033] Figure 8 For the present utility model Figure 3 Enlarged view of point C in the middle;

[0034] In the diagram: 1. Upper mold; 2. Lower mold; 3. Pin; 4. Rib plate; 5. Buckle plate; 6. Collar; 7. Positioning seat; 8. Slide groove; 9. Cut groove; 10. Gear groove; 11. Gear; 12. Shaft; 13. Cutting edge; 14. Anti-rotation part; 15. Anti-rotation groove; 16. Ratchet; 17. Pad; 18. Spring; 19. Guide groove; 20. Lever; 21. Support rod. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to embodiments:

[0036] Example 1

[0037] like Figure 1-8As shown, this utility model provides a high-efficiency sand casting mold for the inner pump body of cast steel parts, including an upper mold 1 and a lower mold 2 that cooperate with each other. A connecting assembly is provided between the upper mold 1 and the lower mold 2. The connecting assembly includes a pin 3. Multiple ribs 4 are provided on one side of the upper mold 1 and the lower mold 2, and snap plates 5 that can be interlocked are provided on the other side of the upper mold 1 and the lower mold 2. The end of the rib 4 is provided with a collar 6. The pin 3 passes through multiple collars 6. A positioning seat 7 is provided on the lower mold 2. The positioning seat 7 is provided with a telescopic assembly for the pin 3 to enter and exit the collars 6. When the pin 3 is inserted into multiple collars 6, the upper mold 1 and the lower mold 2 can rotate around the pin 3; when the pin 3 leaves the collars 6, the upper mold 1 and the lower mold 2 can be separated.

[0038] In this embodiment, the mold consists of a matching upper mold 1 and a lower mold 2. Ribs 4 are fixedly connected to the upper mold 1 and the lower mold 2 respectively. The number of ribs 4 is preferably four, with two on the upper mold 1 and the lower mold 2 respectively. A collar 6 is integrally formed at the end of the rib 4. A pin 3 can pass through the collar 6 to hinge the upper mold 1 and the lower mold 2 together, so that the error between the upper mold 1 and the lower mold 2 is not too large. The fastening plate 5 is located on the opposite side of the rib 4. The two fastening plates 5 can fasten the upper mold 1 and the lower mold 2 together, which can facilitate the fixation between the upper mold 1 and the lower mold 2. The pin 3 can leave the collar 6, and the upper mold 1 and the lower mold 2 can be separated for use, which facilitates demolding.

[0039] like Figure 1-8 As shown, in this embodiment, preferably, the telescopic component includes a sliding groove 8 installed inside the positioning seat 7. There are two pins 3, which slide in conjunction with the sliding groove 8. One end of the pin 3 inside the positioning seat 7 is provided with a semi-cylindrical groove 9. Multiple continuous toothed grooves 10 are provided on opposite sides of the two grooves 9. A gear 11 is provided in the middle of the positioning seat 7. Multiple toothed grooves 10 on the same groove 9 form a rack structure that drives and engages with the gear 11. The sliding groove 8 is opened inside the positioning seat 7, and the pin 3 can slide in the sliding groove 8. The groove 9 cuts off a portion of one end of the pin 3 inside, and a space for the gear 11 is formed between the two grooves 9. Multiple toothed grooves 10 are opened on the grooves 9, so that a part of the pin 3 forms a rack structure. The gear 11 meshes with the two rack structures. The rotation of the gear 11 can synchronously drive the two pins 3 to move closer or further apart through the multiple toothed grooves 10, which facilitates the adjustment of the position of the pins 3 and whether the pins 3 are inserted into the multiple collars 6.

[0040] like Figure 1-8As shown, preferably, the positioning seat 7 is provided with a rotating shaft 12, the rotating shaft 12 is engaged with the gear 11 for anti-rotation, one end of the rotating shaft 12 extends to the outside of the positioning seat 7, and the end of the rotating shaft 12 extending to the outside of the positioning seat 7 is provided with a cutting edge 13. The rotating shaft 12 is rotatably connected to the positioning seat 7, and the rotating shaft 12 is fixedly connected to the gear 11. The cutting edge 13 can be internally hexagonal, and a hexagonal wrench can be used to drive the rotating shaft 12 and the gear 11 on it to rotate, which can easily drive the pin 3 to move.

[0041] Example 2

[0042] like Figure 1-8 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the pin 3 is provided with an anti-rotation part 14, and the slide groove 8 is provided with an anti-rotation groove 15.

[0043] In this embodiment, the anti-rotation part 14 is integrally formed on the pin 3, and the anti-rotation groove 15 is formed on the slide groove 8. The anti-rotation part 14 and the anti-rotation groove 15 are slidably connected, which can prevent the pin 3 from being misaligned during rotation and does not affect the transmission between the gear 11 and the tooth groove 10.

[0044] Example 3

[0045] like Figure 1-8 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, a ratchet 16 is provided on the rotating shaft 12, a pawl 17 is hinged inside the positioning seat 7, and a spring 18 for resetting the pawl 17 is provided inside the positioning seat 7; a guide groove 19 is provided on the positioning seat 7, and a lever 20 is provided on the pawl 17, the lever 20 extending to the outside of the positioning seat 7.

[0046] In this embodiment, ratchet 16 is fixedly connected to shaft 12, one end of pawl 17 is hinged to the inside of positioning seat 7, spring 18 is located inside positioning seat 7, guide groove 19 is formed on positioning seat 7, lever 20 is fixedly connected to pawl 17, lever 20 can slide in guide groove 19. Under normal conditions, ratchet 16 and pawl 17 can make shaft 12 rotate in only one direction. When it is necessary to make shaft 12 rotate in the opposite direction, lever 20 needs to be moved to the other side of guide groove 19.

[0047] Example 4

[0048] like Figure 1-8 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, support rods 21 are provided at both ends of the upper mold 1 and the lower mold 2.

[0049] In this embodiment, the support rods 21 are located on both sides of the upper mold 1 and the lower mold 2, which can facilitate the support of the mold. The support rods 21 are provided with lifting holes, which can facilitate the lifting of the upper mold 1 and the lower mold 2.

[0050] The working principle of the mold used for sand casting of the pump body of this high-efficiency cast steel part will be explained in detail below.

[0051] like Figure 1-8 As shown, during use, the wrench is first inserted into the blade 13 and drives the rotating shaft 12 to rotate. The rotation of the rotating shaft 12 causes the two pins 3 to be inserted into the corresponding collars 6 through the gear 11 and the tooth groove 10, connecting the upper mold 1 and the lower mold 2 together. Then, the upper mold 1 and the lower mold 2 are separated and the inner pump body is sand cast. After casting is completed, the pins 3 are separated from the collars 6, and then the cast workpiece can be demolded. During the rotation of the rotating shaft 12, the gear 11 and the ratchet 16 will rotate with the rotating shaft 12. The rotation of the gear 11 can drive the gear 11 structure on both sides to move synchronously. The rotation of the ratchet 16 can make the rotating shaft 12 rotate only in one direction. When the rotating shaft 12 needs to rotate in the opposite direction, the lever 20 is moved to disengage the pawl 17 from the ratchet 16, and the rotating shaft 12 can then rotate in the opposite direction.

[0052] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A sand casting mold for an internal pump body of high-efficiency cast steel parts, comprising an upper mold (1) and a lower mold (2) that cooperate with each other; characterized in that: A connecting assembly is provided between the upper mold (1) and the lower mold (2). The connecting assembly includes a pin (3). Multiple stiffeners (4) are provided on one side of the upper mold (1) and the lower mold (2). Interlocking plates (5) are provided on the other side of the upper mold (1) and the lower mold (2). A collar (6) is provided at the end of the stiffener (4). The pin (3) passes through multiple collars (6). A positioning seat (7) is provided on the lower mold (2). A telescopic assembly for the pin (3) to enter and exit the collar (6) is provided on the positioning seat (7). When the pin (3) is inserted into multiple collars (6), the upper mold (1) and the lower mold (2) can rotate around the pin (3). When the pin (3) leaves the collar (6), the upper mold (1) and the lower mold (2) can be separated.

2. The mold for sand casting of an internal pump body of a high-efficiency cast steel part according to claim 1, characterized in that: The telescopic assembly includes a slide groove (8) installed inside the positioning seat (7). There are two pins (3). The pins (3) slide in the slide groove (8). One end of the pin (3) inside the positioning seat (7) is provided with a semi-cylindrical groove (9). The two grooves (9) are provided with multiple continuous toothed grooves (10) on opposite sides. The positioning seat (7) is provided with a gear (11) in the middle. The multiple toothed grooves (10) on the same groove (9) form a rack structure that drives the gear (11).

3. The mold for sand casting of an internal pump body of a high-efficiency cast steel part according to claim 2, characterized in that: The positioning seat (7) is provided with a rotating shaft (12), which is engaged with the gear (11) to prevent rotation. One end of the rotating shaft (12) extends to the outside of the positioning seat (7), and the end of the rotating shaft (12) extending to the outside of the positioning seat (7) is provided with a knife edge (13).

4. The mold for sand casting of an internal pump body of a high-efficiency cast steel part according to claim 3, characterized in that: The pin (3) is provided with an anti-rotation part (14), and the slide groove (8) is provided with an anti-rotation groove (15).

5. The mold for sand casting of an internal pump body of a high-efficiency cast steel part according to claim 4, characterized in that: The rotating shaft (12) is provided with a ratchet (16), the positioning seat (7) is internally hinged with a pawl (17), and the positioning seat (7) is internally provided with a spring (18) for resetting the pawl (17).

6. The mold for sand casting of an internal pump body of a high-efficiency cast steel part according to claim 5, characterized in that: The positioning seat (7) is provided with a guide groove (19), and the pawl (17) is provided with a lever (20), which extends to the outside of the positioning seat (7).

7. The mold for sand casting of an internal pump body of a high-efficiency cast steel part according to claim 6, characterized in that: The upper mold (1) and the lower mold (2) are respectively provided with support rods (21) at both ends.

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