Die sticking prevention device for die-casting forming of motor shell

Abstract

The utility model discloses a die sticking prevention device for die-casting forming of a motor shell, and relates to the technical field of motor shells. The die sticking prevention device for die-casting forming of the motor shell comprises a base, and a workbench is installed at the upper end of the base; the die-casting assembly comprises a die core, a first sliding groove is formed in the surface of the workbench, and a guide rod is fixedly connected into the first sliding groove. Through the arrangement of the pouring mold, the mold core and the lower mold, the smooth separation of the pouring mold and the auxiliary demolding action of the lower mold, the defects of deformation, breakage and the like of a fine structure of a motor shell caused by forced demolding are overcome, and the mold core and the lower mold are not damaged. According to the device, the motor shell can be completely and smoothly demoulded from the mould, the device plays an indispensable role in each stage from mould closing, pressure casting to cooling and demoulding, high-quality forming and smooth demoulding of the motor shell are jointly ensured, the processing effect of the device is improved, and the demoulding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor housing technology, and in particular to an anti-sticking mold device for die-casting motor housings. Background Technology

[0002] In the motor manufacturing industry, the production quality and efficiency of motor housings play a crucial role in the overall performance and cost control of motors. Die casting, as a highly efficient metal forming process, is widely used in motor housing manufacturing because it can quickly produce high-precision motor housings with complex shapes.

[0003] The structure of motor housing is often quite complex, with various grooves, protrusions and reinforcing ribs. These structures can easily lead to large adhesion and friction between the mold and the motor housing, making the demolding process extremely difficult. For the delicate structures on the motor housing, deformation and breakage are likely to occur during forced demolding, which seriously affects product quality. Therefore, this utility model proposes a novel solution. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an anti-sticking mold device for die casting of motor housing. This device can solve the problem that the structure of motor housing is often complex, with various grooves, protrusions and reinforcing ribs, which can easily lead to large adhesion and friction between the mold and the motor housing, making the demolding process extremely difficult.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a die-casting anti-sticking mold device for motor housing, including a base, with a worktable installed on the upper end of the base;

[0006] A die-casting assembly is set on a worktable. The die-casting assembly includes a mold core, which is fixedly connected to the worktable. A first groove is opened on the surface of the worktable, and a guide rod is fixedly connected inside the first groove.

[0007] A slider is slidably connected to the surface of the guide rod. The slider is slidably connected to the inner wall of the first groove. The slider is T-shaped. A lower mold is fixedly connected to the upper end of the slider. The upper end of the lower mold is arc-shaped and the lower end is fan-shaped. A connecting shaft is fixedly connected to the lower end of the slider.

[0008] A fixed bracket is fixedly connected to the upper end of the base. A rotating shaft is rotatably connected inside the fixed bracket. The rotating shaft is cylindrical. A turntable is fixedly connected to the surface of the rotating shaft. The turntable is windmill-shaped. A second sliding groove is opened on the surface of the turntable. The connecting shaft is slidably connected to the second sliding groove.

[0009] Preferably, the die-casting assembly further includes a drive motor, which is fixedly connected to the fixed bracket, and the output end of the drive motor is fixedly connected to a first gear;

[0010] A second gear is fixedly connected to the surface of the shaft, and the first gear and the second gear mesh.

[0011] Preferably, the lower mold, the first slide, the guide rod, the slider, the second slide, and the connecting shaft are all arranged in four sets symmetrically around the mold core;

[0012] The surfaces of the four lower molds and the mold core are all coated with tungsten carbide.

[0013] Preferably, the upper ends of the four lower molds are all fixedly connected to connecting plates, the upper ends of the four lower molds are snapped with casting molds, the four connecting plates are snapped with casting molds, and the lower ends of the casting molds are provided with casting grooves.

[0014] A mold core connecting block is fixedly connected to the upper end of the mold core, and the casting mold is slidably connected to the mold core connecting block.

[0015] Preferably, the upper end of the workbench is provided with a movable plate, and four first hydraulic rods are fixedly connected to the upper end of the workbench. The movable plate is fixedly connected to the output end of the four first hydraulic rods.

[0016] The movable plate has two second hydraulic rods fixedly connected inside, and the casting mold is fixedly connected to the output ends of the two second hydraulic rods.

[0017] Preferably, a cooling water pipe is fixedly connected inside the mold core. The cooling water pipe is spiral-shaped, and both ends of the cooling water pipe extend out of the mold core and pass through the worktable.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This anti-sticking device for motor housing die casting overcomes the large adhesion and friction between the mold and the motor housing caused by the complex structure through the setting of the casting mold, mold core, and lower mold, the smooth separation of the casting mold and the assisted demolding action of the lower mold. It avoids the defects such as deformation and breakage caused by forced demolding to the delicate structure of the motor housing, and ensures that the motor housing can be completely and smoothly removed from the mold. It plays an indispensable role in each stage from mold closing, die casting to cooling and demolding, and together ensures the high-quality molding and smooth demolding of the motor housing, improves the processing effect of the device, and improves the demolding efficiency. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1This is a schematic diagram of the anti-sticking mold device for die-casting motor housing according to this utility model;

[0022] Figure 2 This is a schematic diagram of the slider of this utility model;

[0023] Figure 3 This is a schematic diagram of the turntable of this utility model;

[0024] Figure 4 This is a schematic diagram of the casting mold of this utility model;

[0025] Figure 5 This is a schematic diagram of the lower mold of this utility model;

[0026] Figure 6 This is a schematic diagram of the cooling water pipe of this utility model.

[0027] Reference numerals: 1. Base; 2. Workbench; 3. First hydraulic rod; 4. Movable plate; 5. Second hydraulic rod; 6. Casting mold; 7. Mold core; 8. Lower mold; 9. First slide groove; 10. Guide rod; 11. Slider; 12. Fixed bracket; 13. Drive motor; 14. First gear; 15. Rotating shaft; 16. Second gear; 17. Turntable; 18. Second slide groove; 19. Connecting shaft; 20. Mold core connecting block; 21. Casting groove; 22. Connecting plate; 23. Cooling water pipe. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Please see Figure 1-6 This utility model provides a technical solution: a die-casting anti-sticking device for motor housing, including a base 1, a worktable 2 mounted on the upper end of the base 1, a die-casting assembly, the die-casting assembly being set on the worktable 2, the die-casting assembly including a mold core 7, the mold core 7 being fixedly connected to the worktable 2, a first groove 9 being formed on the surface of the worktable 2, a guide rod 10 being fixedly connected inside the first groove 9, a slider 11 being slidably connected to the surface of the guide rod 10, the slider 11 being slidably connected to the inner wall of the first groove 9, and the slider 11 being integrally shaped like a " The slider 11 is T-shaped, and the upper end of the slider 11 is fixedly connected to the lower mold 8. The upper end of the lower mold 8 is an arc-shaped plate, and the lower end of the lower mold 8 is a fan shape. The lower end of the slider 11 is fixedly connected to the connecting shaft 19. The upper end of the base 1 is fixedly connected to the fixed bracket 12. The fixed bracket 12 is rotatably connected to the rotating shaft 15. The rotating shaft 15 is cylindrical. The surface of the rotating shaft 15 is fixedly connected to the turntable 17. The turntable 17 is windmill-shaped. The surface of the turntable 17 is provided with a second sliding groove 18. The connecting shaft 19 is slidably connected to the second sliding groove 18.

[0033] The die-casting assembly also includes a drive motor 13, which is fixedly connected to the fixed bracket 12. The output end of the drive motor 13 is fixedly connected to a first gear 14, and the surface of the rotating shaft 15 is fixedly connected to a second gear 16. The first gear 14 and the second gear 16 mesh with each other.

[0034] The number of lower mold 8, first slide 9, guide rod 10, slider 11, second slide 18 and connecting shaft 19 are all four sets symmetrically arranged around the mold core 7. The surfaces of the four lower molds 8 and the mold core 7 are all coated with tungsten carbide.

[0035] The upper ends of the four lower molds 8 are all fixedly connected with connecting plates 22, the upper ends of the four lower molds 8 are snapped with casting molds 6, the four connecting plates 22 are snapped with casting molds, the lower end of the casting mold 6 is provided with a casting groove 21, the upper end of the mold core 7 is fixedly connected with a mold core connecting block 20, and the casting mold 6 and the mold core connecting block 20 are slidably connected.

[0036] The upper end of the workbench 2 is provided with a movable plate 4. Four first hydraulic rods 3 are fixedly connected to the upper end of the workbench 2. The movable plate 4 is fixedly connected to the output end of the four first hydraulic rods 3. Two second hydraulic rods 5 are fixedly connected inside the movable plate 4. The casting mold 6 is fixedly connected to the output end of the two second hydraulic rods 5.

[0037] A cooling water pipe 23 is fixedly connected inside the mold core 7. The cooling water pipe 23 is spiral in shape, and both ends of the cooling water pipe 23 extend out of the mold core 7 and pass through the worktable 2.

[0038] When using this device, before starting die casting, first connect the cooling medium to the spiral cooling water pipe 23 inside the mold core 7 to ensure that the cooling system can work normally and prepare for the subsequent cooling of the motor housing; at the same time, check whether the connection of each component of the equipment is secure and confirm that the power components such as the drive motor 13, the first hydraulic rod 3, and the second hydraulic rod 5 can operate normally.

[0039] The four first hydraulic rods 3 are activated, shortening them and pushing the connected movable plate 4 downwards. The movable plate 4 drives the two second hydraulic rods 5 inside it to descend synchronously, pushing the casting mold 6 to slide downwards along the mold core connecting block 20. During the descent, the four lower molds 8 gradually engage with the casting mold 6 through the connecting plate 22 until the mold is fully closed, forming a closed cavity for die casting. Since the connecting plate 22 engages with the four lower molds 8 and the casting mold 6 respectively, this connection method ensures the tightness and stability of the mold closing, preventing misalignment and other problems during the die casting process.

[0040] After the mold is closed, the molten metal is injected into the mold cavity through the casting groove 21 at the lower end of the casting mold 6; the molten metal fills the space formed between the mold core 7, the casting mold 6, and the lower mold 8, and the die casting begins; at this time, the tungsten carbide coating on the surface of the mold core 7 and the lower mold 8 plays a key role; the tungsten carbide coating has the characteristics of high hardness, good wear resistance, and strong chemical stability, which can effectively reduce the adhesion between the molten metal and the mold surface, reduce the occurrence of sticking, and ensure that the motor housing can be formed smoothly during the die casting process and that the surface quality is good.

[0041] After die casting is completed, the cooling medium in the cooling water pipe 23 continues to circulate; the spiral cooling water pipe 23 increases the contact area with the mold core 7, which can more fully remove the heat from the mold core 7 and the motor housing, and accelerate the cooling and solidification of the motor housing; when the motor housing cools to a suitable temperature, the first hydraulic rod 3 and the second hydraulic rod 5 are activated again; the first hydraulic rod 3 extends, driving the movable plate 4 to rise, and the second hydraulic rod 5 retracts, driving the casting mold 6 to rise, so that the casting mold 6 separates from the lower mold 8.

[0042] Start the drive motor 13; the output of the drive motor 13 drives the first gear 14 to rotate, the first gear 14 meshes with the second gear 16, thereby driving the second gear 16 to rotate; the second gear 16 is fixed on the rotating shaft 15, so the rotating shaft 15 also rotates; the windmill-shaped turntable 17 fixed on the surface of the rotating shaft 15 rotates together, and the second groove 18 on the surface of the turntable 17 is slidably connected to the connecting shaft 19; as the turntable 17 rotates, the connecting shaft 19 slides in the second groove 18, pushing the connected slider 11 along the first groove 18. The guide rod 10 slides; since the lower mold 8 is fixed on the upper end of the slider 11, and the lower mold 8, the first slide groove 9, the guide rod 10, the slider 11, the second slide groove 18 and the connecting shaft 19 are all in four sets and symmetrically distributed around the mold core 7, the four lower molds 8 will move outward synchronously; this outward movement generates a uniform force on the die-cast motor housing, assisting in demolding, overcoming the large adhesion and friction between the mold and the motor housing caused by the complex structure, and avoiding defects such as deformation and breakage caused by forced demolding to the fine structure of the motor housing.

[0043] While assisting in demolding, the demolding is finally completed, resulting in the formed motor housing.

[0044] Furthermore, through the setup of the casting mold 6, mold core 7, and lower mold 8, the smooth separation of the casting mold 6 and the assisted demolding action of the lower mold 8 overcome the large adhesion and friction forces generated between the mold and the motor housing due to the complex structure. This avoids defects such as deformation and breakage caused by forced demolding to the delicate structure of the motor housing, ensuring that the motor housing can be completely and smoothly removed from the mold. It plays an indispensable role in each stage from mold closing and die casting to cooling and demolding, jointly ensuring the high-quality molding and smooth demolding of the motor housing, improving the processing effect of the device, and increasing demolding efficiency.

[0045] By applying a tungsten carbide coating to the surfaces of the lower mold 8 and the mold core 7, the tungsten carbide coating, with its high hardness, good wear resistance, and strong chemical stability, can effectively reduce the adhesion between the molten metal and the mold surface, reduce the occurrence of sticking, ensure that the molten metal can flow smoothly during the filling process, and enable the motor housing to be formed smoothly with good surface quality.

[0046] Structural Description: Base 1: Provides support and stability for the entire device, serves as the carrier for mounting other components, and ensures that the device will not shake or shift during operation;

[0047] Workbench 2: Installed on the upper part of base 1, it is used to support the die-casting components and provide a stable working surface for the die-casting process, ensuring the accuracy of the die-casting operation;

[0048] First hydraulic rod 3: There are four in total, fixed on the upper end of the workbench 2. By extending or shortening, they push the movable plate 4 to move up and down, thereby controlling the lifting and lowering of the casting mold 6, and realizing the position adjustment of the casting mold 6 when closing and demolding.

[0049] Movable plate 4: Connects the output ends of four first hydraulic rods 3, and two second hydraulic rods 5 are fixed inside it. Under the action of the first hydraulic rods 3, it drives the second hydraulic rods 5 and the casting mold 6 to move up and down, coordinating the opening and closing action of the mold.

[0050] The second hydraulic rod 5 is fixed inside the movable plate 4, and its output end is connected to the casting mold 6. It pushes the casting mold 6 to slide along the mold core connecting block 20, and precisely controls the position and movement of the casting mold 6 during the mold closing and demolding process.

[0051] Casting mold 6: A casting groove 21 is provided at the lower end to guide the molten metal liquid into the mold cavity; when the mold is closed, it cooperates with the lower mold 8 to form a closed cavity; when demolding, it rises and separates from the lower mold 8 under the action of the first and second hydraulic rods. Its smooth separation is one of the key steps in demolding to avoid damage to the motor housing.

[0052] Mold core 7: Fixed on the worktable 2, it shapes the internal structure of the motor housing; it has a spiral cooling water pipe 23 inside, which is used to cool the motor housing after die casting and accelerate its solidification; the tungsten carbide coating on the surface can reduce the adhesion of the molten metal, reduce sticking to the mold, and ensure the molding quality of the internal structure of the motor housing.

[0053] The lower mold 8 has an arc-shaped upper end and a fan-shaped lower end. It is installed on the first slide groove 9 of the worktable 2 via the slider 11. The four lower molds 8 are symmetrically distributed around the mold core 7. When the mold is closed, they cooperate with the casting mold 6 to form a cavity. When demolding, they move outward synchronously under the drive of the drive motor 13 and other components to assist in demolding, overcome the adhesion and friction between the mold and the motor housing, and protect the fine structure of the motor housing.

[0054] First slide 9: It is formed on the surface of the worktable 2 and cooperates with the guide rod 10 to provide a sliding track for the slider 11, so that the lower mold 8 can move smoothly in the specified direction and ensure the accuracy and stability of the movement of the lower mold 8.

[0055] Guide rod 10: Fixed inside the first slide groove 9, the slider 11 slides on its surface, playing a guiding role, limiting the movement trajectory of the slider 11, ensuring the movement accuracy of the lower mold 8, and thus ensuring the accuracy of the entire die casting and demolding process;

[0056] Slider 11: It is T-shaped and slidably connected to the inner wall of the first slide groove 9. The upper end is connected to the lower mold 8 and the lower end is connected to the connecting shaft 19. Under the push of the connecting shaft 19, the lower mold 8 is driven to slide in the first slide groove 9 to realize the opening and closing action of the lower mold 8.

[0057] Fixed bracket 12: Fixed to the upper end of the base 1, with internal rotatable connection to the rotating shaft 15, providing support and installation position for the rotating shaft 15, and ensuring that the rotating shaft 15 can rotate stably;

[0058] Drive motor 13: Fixed on the fixed bracket 12, the output end is connected to the first gear 14, providing power for the auxiliary action during demolding, and driving the rotating shaft 15 to rotate through gear transmission, thereby causing the lower mold 8 to move outward to assist demolding;

[0059] First gear 14: Fixed at the output end of drive motor 13, meshing with second gear 16, transmitting the power of drive motor 13 to second gear 16, realizing the conversion and transmission of power, and driving the movement of subsequent components;

[0060] Rotating shaft 15: It is cylindrical and rotatably connected inside the fixed bracket 12. The second gear 16 and the turntable 17 are fixed on its surface. It rotates under the drive of the second gear 16, which in turn drives the turntable 17 to rotate, providing a power source for the auxiliary demolding action of the lower mold 8.

[0061] The second gear 16 is fixed on the surface of the rotating shaft 15, meshes with the first gear 14, receives the power transmitted by the first gear 14, and drives the rotating shaft 15 to rotate. It is a key component in the power transmission process.

[0062] Turntable 17: It is shaped like a windmill and is fixed on the surface of the rotating shaft 15. A second groove 18 is opened on the surface. As the rotating shaft 15 rotates, the second groove 18 slides through the connecting shaft 19, pushing the connecting shaft 19 to move, thereby driving the lower mold 8 to move.

[0063] The second slide 18 is formed on the surface of the turntable 17 and is slidably connected to the connecting shaft 19. It converts the rotational motion of the turntable 17 into the linear motion of the connecting shaft 19, thereby pushing the slider 11 and the lower mold 8 to move.

[0064] Connecting shaft 19: The lower end is fixedly connected to the slider 11, and the upper end slides in the second slide groove 18. When the turntable 17 rotates, it transmits the movement of the turntable 17 to the slider 11, thereby realizing the outward movement of the lower mold 8 to assist in demolding.

[0065] Mold core connecting block 20: Fixed on the upper end of mold core 7, the casting mold 6 is slidably connected to the mold core connecting block 20, providing guidance and positioning for the up and down sliding of the casting mold 6, and ensuring the accurate relative position of the casting mold 6 and the mold core 7 during the mold closing and demolding process;

[0066] Casting trough 21: Located at the lower end of casting mold 6, it is the channel for injecting molten metal into the mold cavity, ensuring that the molten metal can be accurately filled into the mold cavity and guaranteeing the molding quality of the motor housing;

[0067] Connecting plates 22: There are four in total, which are fixed to the upper end of the four lower molds 8 and snapped into the casting mold 6; when the mold is closed, it ensures that the four lower molds 8 are tightly connected to the casting mold 6 to form a stable cavity, and at the same time ensures that the mold will not be misaligned during the die casting process;

[0068] Cooling water pipe 23: It is fixed in a spiral shape inside the mold core 7, with both ends passing through the mold core 7 and the worktable 2; After die casting is completed, the cooling medium circulates in it, carrying away the heat of the mold core 7 and the motor housing, accelerating the cooling and solidification of the motor housing, and improving production efficiency and product quality;

[0069] Tungsten carbide coating: Applied to the surfaces of the lower mold 8 and the mold core 7, it utilizes the characteristics of high hardness, good wear resistance and strong chemical stability to reduce the adhesion between the molten metal and the mold surface, reduce the phenomenon of sticking to the mold, ensure the smooth flow of the molten metal, and make the motor housing form smoothly with good surface quality.

[0070] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An apparatus for preventing sticking of an electric motor housing in a die-casting mold, characterized by: Includes a base (1), and a workbench (2) is installed on the upper end of the base (1); The die casting assembly is set on the workbench (2). The die casting assembly includes a mold core (7). The mold core (7) is fixedly connected to the workbench (2). A first groove (9) is opened on the surface of the workbench (2). A guide rod (10) is fixedly connected inside the first groove (9). A slider (11) is slidably connected to the surface of the guide rod (10). The slider (11) is slidably connected to the inner wall of the first groove (9). The slider (11) is T-shaped. A lower mold (8) is fixedly connected to the upper end of the slider (11). The upper end of the lower mold (8) is an arc-shaped plate. The lower end of the lower mold (8) is a fan-shaped area. A connecting shaft (19) is fixedly connected to the lower end of the slider (11). A fixed bracket (12) is fixedly connected to the upper end of the base (1). A rotating shaft (15) is rotatably connected inside the fixed bracket (12). The rotating shaft (15) is cylindrical. A turntable (17) is fixedly connected to the surface of the rotating shaft (15). The turntable (17) is windmill-shaped. A second sliding groove (18) is opened on the surface of the turntable (17). The connecting shaft (19) is slidably connected to the second sliding groove (18).

2. The electro-magnetic housing die-cast anti-sticking mold apparatus of claim 1, wherein: The die-casting assembly also includes a drive motor (13), which is fixedly connected to the fixed bracket (12), and the output end of the drive motor (13) is fixedly connected to a first gear (14); A second gear (16) is fixedly connected to the surface of the rotating shaft (15), and the first gear (14) and the second gear (16) mesh.

3. The apparatus of claim 1 wherein: The number of the lower mold (8), the first slide groove (9), the guide rod (10), the slider (11), the second slide groove (18) and the connecting shaft (19) are all four sets symmetrically arranged around the mold core (7); The surfaces of the four lower molds (8) and the mold core (7) are all coated with tungsten carbide.

4. The electro-magnetic housing die-cast anti-sticking mold apparatus of claim 1, wherein: The upper ends of the four lower molds (8) are all fixedly connected with connecting plates (22), the upper ends of the four lower molds (8) are clamped with casting molds (6), the four connecting plates (22) are clamped with casting molds, and the lower end of the casting molds (6) is provided with casting grooves (21). The upper end of the mold core (7) is fixedly connected to the mold core connecting block (20), and the casting mold (6) is slidably connected to the mold core connecting block (20).

5. The electro-magnetic housing die-cast anti-sticking mold apparatus of claim 1, wherein: The upper end of the workbench (2) is provided with a movable plate (4), and four first hydraulic rods (3) are fixedly connected to the upper end of the workbench (2). The movable plate (4) is fixedly connected to the output end of the four first hydraulic rods (3). The movable plate (4) has two second hydraulic rods (5) fixedly connected inside, and the casting mold (6) is fixedly connected to the output ends of the two second hydraulic rods (5).

6. The electro-magnetic housing die-cast anti-sticking mold apparatus of claim 1, wherein: The mold core (7) is fixedly connected to a cooling water pipe (23). The cooling water pipe (23) is spiral in shape, and both ends of the cooling water pipe (23) extend out of the mold core (7) and pass through the worktable (2).

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