A high-precision multi-direction hydraulic core-pulling die for forming a complex diverter housing

Abstract

This invention relates to the technical field of die-casting molds, and more particularly to a high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings. It includes: a base plate; a fixed mold connected to the top of the base plate; a mounting bracket connected to the top of the base plate; a first hydraulic cylinder symmetrically mounted on the mounting bracket; a moving mold connected to the telescopic rod of the first hydraulic cylinder, and located directly above the fixed mold; a gate disposed on the moving mold; movable cores spaced apart on the fixed mold; and heat-conducting pipes connected to the interior of the movable cores. This invention, through the combination of heat-conducting pipes and spiral tubes with moving and conveying components, achieves efficient and uniform cooling of the movable cores. Specifically, the heat-conducting pipes are embedded inside the movable cores, and the spiral tubes are placed within the heat-conducting pipes, forming a circulating water path through inlet and outlet pipes, allowing cold water to continuously absorb heat from the movable cores. This structure, in conjunction with the cooling systems of the moving and fixed molds, can simultaneously cool both the outer and inner walls of the casting.

Description

Technical Field

[0001] This invention relates to the technical field of die-casting molds, and more particularly to a high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings. Background Technology

[0002] In the field of automotive steering systems, the steering gear housing is a core structural component with a complex internal structure, often containing multiple side holes, internal cavities, and precision undercut features. This requires the molding die to have multi-directional core-pulling capabilities. Currently, high-precision hydraulic core-pulling dies are widely used in the die-casting of complex steering gear housings due to their advantages such as large core-pulling force, controllable stroke, and smooth operation.

[0003] These types of molds typically use multiple hydraulic cylinders on the moving and fixed molds to drive the movable core to precisely enter the cavity position during mold closing. Together with the moving and fixed molds, they form a complete molding space to complete the high-pressure injection and molding of molten metal. However, existing technologies have significant cooling defects: the mold's cooling system is generally only integrated inside the moving and fixed mold bodies, cooling the outer surface of the mold and the outer wall of the molded casting through cooling water channels. This cooling method cannot effectively cover the movable core that penetrates deep into the cavity to participate in the molding process. After the molten metal (such as aluminum alloy) is filled, the movable core directly contacts the inner wall of the casting, absorbing and accumulating a large amount of heat. This results in the heat dissipation efficiency of the movable core and the inner wall area of ​​the casting being much lower than that of the outer wall. When the entire casting has not been completely and uniformly cooled and the interior is still in a high-temperature softened state, the removal action of the movable core can easily cause pulling or squeezing of the still-unformed inner wall of the casting, causing the molded steering gear housing to warp, deform, or even crack. This seriously affects the product's dimensional accuracy, structural strength, and yield, becoming a bottleneck problem restricting the high-quality and high-efficiency production of complex housings. Summary of the Invention

[0004] In view of this, the present invention provides a high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings. It can overcome the shortcomings of existing core-pulling molds, such as difficulty in cooling the surface of the movable core, low cooling efficiency, and the fact that when the casting as a whole has not been completely and uniformly cooled and the interior is still in a high-temperature softened state, the pulling action of the movable core can easily cause pulling or squeezing of the inner wall of the casting that has not yet been shaped.

[0005] The technical solution of the present invention is as follows: a high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings, comprising: a base plate; a fixed mold connected to the top of the base plate; a mounting frame connected to the top of the base plate; a first hydraulic cylinder symmetrically mounted on the mounting frame; a moving mold connected to the telescopic rod of the first hydraulic cylinder, and the moving mold being located directly above the fixed mold; a gate disposed on the moving mold; movable cores disposed at intervals on the fixed mold; a heat-conducting pipe connected to the interior of the movable core; a spiral tube connected to the interior of the heat-conducting pipe; a moving component disposed on the base plate for driving the movable core to move; and a conveying component disposed on the spiral tube for conveying cold water to the interior of the spiral tube.

[0006] As a preferred embodiment of the present invention, the moving component includes: a second hydraulic cylinder, which is spaced apart and installed on the top of the base plate; a guide frame, which is spaced apart and connected to the top of the base plate; and a slider, which is slidably connected to the inside of the guide frame. The movable core is fixedly connected to the slider, and the telescopic rod of the second hydraulic cylinder is connected to the slider.

[0007] As a preferred embodiment of the present invention, the conveying assembly includes: an inlet pipe connected to the guide frame, wherein one end of the inlet pipe is connected to and maintains communication with one end of the spiral tube; and an outlet pipe connected to the guide frame, wherein one end of the outlet pipe is connected to and maintains communication with the other end of the spiral tube.

[0008] As a preferred embodiment of the present invention, it further includes: a sliding frame, slidably connected to the interior of one of the movable cores, and the sliding frame having square holes spaced apart circumferentially; a connecting spring, with its two ends respectively connected to the sliding frame and the movable core; an air supply pipe, connected to the sliding frame; a branch pipe, circumferentially connected to the end of the air supply pipe and maintaining communication; and a hollow block, slidably connected to the branch pipe and maintaining communication, the hollow block being located inside the square holes, and having an air outlet on its side.

[0009] As a preferred embodiment of the present invention, it further includes: a horizontal tube disposed on the side of the mounting frame; a fan installed at one end of the horizontal tube; an air outlet duct symmetrically and spaced apart from the horizontal tube and kept in communication; and a translation component disposed on the mounting frame for driving the horizontal tube to move.

[0010] As a preferred embodiment of the present invention, the translation component includes: a mounting base connected to a mounting frame; a guide rod symmetrically and slidably connected to the mounting base; a connecting plate connected to the end of the guide rod, and the connecting plate being fixedly connected to the horizontal tube; and an electric push rod mounted on the mounting base, with the telescopic rod of the electric push rod connected to the connecting plate.

[0011] As a preferred embodiment of the present invention, it further includes: a one-way valve, installed on the horizontal pipe; and a connecting pipe, connected to the top of the one-way valve.

[0012] As a preferred embodiment of the present invention, it further includes: a collection frame connected to the mounting frame and located below the horizontal tube; and a drain pipe connected to the collection frame and kept in communication.

[0013] Beneficial effects: 1. By setting up heat-conducting pipes and spiral tubes in conjunction with moving and conveying components, this invention can achieve efficient and uniform cooling of the movable core. Specifically, the heat-conducting pipes are embedded inside the movable core, and the spiral tubes are placed in the heat-conducting pipes and form a circulating water path through the inlet and outlet pipes, so that the cold water continuously absorbs the heat of the movable core. This structure works in synergy with the cooling systems of the moving and fixed molds to cool the outer and inner walls of the casting simultaneously, effectively solving the problem of insufficient heat dissipation of the movable core in traditional molds, avoiding warping, deformation or cracking of the casting due to uneven cooling, and significantly improving the dimensional accuracy and yield of the product.

[0014] 2. This invention achieves pneumatic-assisted demolding during the core-pulling process through the linkage design of the sliding frame, connecting spring, air supply pipe, and hollow block. Specifically, when the movable core moves, the sliding frame is squeezed and retracts, compressing the connecting spring. When the core is pulled, the connecting spring resets and pushes the sliding frame outward. At the same time, the air supply pipe supplies air to the hollow block through the branch pipe. The gas is injected into the inner cavity of the casting through the air outlet to form positive pressure, which helps the movable core separate from the inner wall of the casting. This mechanism can effectively reduce the pulling or squeezing of the incompletely shaped casting during core pulling, further ensuring the integrity of the complex shell structure and the molding quality.

[0015] 3. This invention utilizes a cleaning and spraying system composed of a horizontal tube, a blower, an air outlet pipe, and a translation component. This system can improve mold maintenance efficiency and molding stability. Specifically, the blower blows air into the horizontal tube and discharges it through the air outlet pipe. An electric push rod drives the horizontal tube to move back and forth, allowing the air outlet pipe to thoroughly clean residual debris on the surfaces of the moving and fixed molds. The release agent is injected through the connecting pipe and one-way valve and can be evenly sprayed onto the mold cavity and core surface by the same system. With the collection frame and drain pipe below, residual release agent can be recovered. This integrated cleaning and spraying operation avoids impurities from affecting the next die casting and ensures uniform coverage of the release agent, thereby guaranteeing high precision and high efficiency in continuous production. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram showing the installation of the movable core, the second hydraulic cylinder, and the guide frame of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation of the heat-conducting pipe and the spiral pipe of the present invention.

[0019] Figure 4 This is a schematic diagram showing the installation of the slider, inlet pipe, and outlet pipe of the present invention.

[0020] Figure 5 This is a schematic diagram of the connection structure of the spiral tube, inlet tube, and outlet tube of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation of the sliding frame, connecting spring, and air supply pipe of the present invention.

[0022] Figure 7 This is a schematic diagram of the specific structure of the sliding frame, air supply pipe and hollow block of the present invention.

[0023] Figure 8 This is a schematic diagram of the specific structure of the gas supply pipe, branch pipe and hollow block of the present invention.

[0024] Figure 9 This is a schematic diagram of the installation of the horizontal pipe, fan, air outlet pipe, one-way valve and connecting pipe of the present invention.

[0025] Figure 10 This is a schematic diagram showing the specific structure of the mounting base, guide rod, connecting plate, and electric push rod of the present invention.

[0026] The markings in the diagram are as follows: 1-Base plate, 2-Fixed mold, 3-Mounting bracket, 4-First hydraulic cylinder, 5-Moving mold, 6-Gate, 7-Movable core, 8-Heat pipe, 9-Spiral tube, 10-Second hydraulic cylinder, 11-Guide frame, 12-Slider, 13-Inlet pipe, 14-Outlet pipe, 15-Sliding frame, 1501-Square hole, 16-Connecting spring, 17-Air supply pipe, 18-Branch pipe, 19-Hollow block, 1901-Air outlet, 20-Horizontal pipe, 21-Fan, 22-Air outlet pipe, 23-Mounting base, 24-Guide rod, 25-Connecting plate, 26-Electric push rod, 27-One-way valve, 28-Connecting pipe, 29-Collection frame, 30-Drain pipe. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings, such as... Figures 1-5As shown, the assembly includes a base plate 1, a fixed mold 2, a mounting frame 3, a first hydraulic cylinder 4, a moving mold 5, a gate 6, a movable core 7, a heat-conducting pipe 8, a spiral pipe 9, a moving assembly, and a conveying assembly. The fixed mold 2 is connected to the top front side of the base plate 1, and the mounting frame 3 is connected to the top rear side of the base plate 1. Two first hydraulic cylinders 4 are symmetrically mounted on the upper left and right sides of the mounting frame 3. The moving mold 5 is connected between the telescopic rods of the two first hydraulic cylinders 4, and the moving mold 5 is located directly above the fixed mold 2. Both the moving mold 5 and the fixed mold 2 are equipped with cooling mechanisms. The aforementioned cooling mechanisms are existing technology and will not be described in detail here. The front of the moving mold 5 is equipped with a gate 6. Three movable cores 7 are spaced apart on the fixed mold 2. The interior of each of the three movable cores 7 is connected to a heat-conducting pipe 8, and the interior of each of the three heat-conducting pipes 8 is connected to a spiral pipe 9. The base plate 1 is equipped with a moving assembly for driving the movable cores 7 to move, and the spiral pipe 9 is equipped with a conveying assembly for conveying cold water.

[0029] like Figure 2 and Figure 4 As shown, the moving assembly includes a second hydraulic cylinder 10, a guide frame 11, and a slider 12. Three second hydraulic cylinders 10 are installed at intervals on the top of the base plate 1, and three guide frames 11 are also connected at intervals on the top of the base plate 1. The guide frames 11 correspond one-to-one with the second hydraulic cylinders 10. The slider 12 is slidably connected inside the guide frame 11. The movable core 7 is fixedly connected to the slider 12, and the telescopic rod of the second hydraulic cylinder 10 is connected to the slider 12.

[0030] like Figure 4 and Figure 5 As shown, the conveying assembly includes an inlet pipe 13 and an outlet pipe 14. Each guide frame 11 is connected to an inlet pipe 13 and an outlet pipe 14. One end of the inlet pipe 13 and the outlet pipe 14 are respectively connected to both ends of the spiral tube 9 and kept in communication.

[0031] When the device is needed, first install it in the designated position, then connect cold water to the inlet pipe 13. Next, evenly spray the release agent onto the fixed mold 2, moving mold 5, and movable core 7. Then, drive the slider 12 towards the center of the fixed mold 2 via the second hydraulic cylinder 10. The slider 12 will move the movable core 7 towards the center of the fixed mold 2 until the ends of the three movable cores 7 contact each other. Then, drive the moving mold 5 downwards via the first hydraulic cylinder 4 until the bottom of the moving mold 5 contacts the top of the fixed mold 2, thus completing the mold closing process. At this time, the three movable cores 7 are all located in the cavity between the fixed mold 2 and the moving mold 5. Then, inject molten metal into the cavity through the sprue 6. Then, activate the cooling mechanism inside the fixed mold 2 and the moving mold 5 to cool their interiors. Simultaneously, cold water can be supplied to the spiral mold via the inlet pipe 13. Inside the spiral tube 9, the cold water inside can absorb the heat from the movable core 7 through the heat-conducting pipe 8 to cool the movable core 7. The water that has absorbed the heat can be discharged out through the liquid outlet pipe 14, forming a water circulation system. This allows for simultaneous cooling of the outer and inner walls of the steering gear housing that is about to be formed, improving cooling efficiency and effect, and ensuring that the steering gear housing can be cooled completely and evenly. After the steering gear housing has cooled and formed, the injection of cold water into the spiral tube 9 is stopped. Then, the first hydraulic cylinder 4 drives the moving mold 5 to move upward and reset, separating the moving mold 5 from the fixed mold 2. Then, the second hydraulic cylinder 10 drives the slider 12 to move away from the center of the fixed mold 2 and reset. The slider 12 can drive the movable core 7 to move away from the center of the fixed mold 2 and reset, causing the movable core 7 to detach from the inner wall of the formed steering gear housing. Finally, the formed steering gear housing can be removed from the fixed mold 2.

[0032] like Figures 6-8 As shown, it also includes a sliding frame 15, a connecting spring 16, an air supply pipe 17, a branch pipe 18, and a hollow block 19. The sliding frame 15 is slidably connected to the right side of the movable core 7 on the left side, and the sliding frame 15 has square holes 1501 spaced circumferentially apart. A connecting spring 16 connects the sliding frame 15 and the movable core 7. An air supply pipe 17 is connected inside the movable core 7 on the left side. The left end of the air supply pipe 17 extends out of the bottom of the guide frame 11 on the left side, and the right end of the air supply pipe 17 connects to the sliding frame 19. 5. The right side of the air supply pipe 17 is a corrugated pipe structure. The corrugated pipe structure can adapt to the left and right movement of the sliding frame 15. The right end of the air supply pipe 17 is circumferentially connected to multiple branch pipes 18 and kept in communication. Each square hole 1501 is slidably connected to a hollow block 19, and the hollow block 19 is slidably connected to the branch pipe 18 and kept in communication. The side of the hollow block 19 away from the air supply pipe 17 is a slope. Each hollow block 19 has two air outlet holes 1901.

[0033] Initially, the sliding frame 15 exposes the right end of the movable core 7 on the left. When the movable core 7 moves closer to the center of the fixed mold 2, the movable core 7 on the left will drive the sliding frame 15 to move to the right. When the sliding frame 15 contacts the left end of the movable core 7 on the right, the sliding frame 15 is blocked and stops moving, while the movable core 7 on the left continues to move to the right, compressing the connecting spring 16. At this time, the sliding frame 15 will gradually retract into the interior of the movable core 7 on the left. When the right side of the movable core 7 on the left contacts the inclined surface of the hollow block 19, it will squeeze the hollow block 19 back into the square hole 1501. Finally, the sliding frame 15 will completely retract into the interior of the movable core 7 on the left, thus not affecting the subsequent cooling and forming of the molten metal. The inner wall of the movable core 7 on the side will block the outside of the square hole 1501. After the steering gear housing is cooled and formed, the movable core 7 will move away from the center of the fixed mold 2 and reset. At this time, the connecting spring 16 will return to its original state, and the square hole 1501 will gradually expose the right side of the movable core 7 on the left. At the same time, air is injected into the branch pipe 18 through the air supply pipe 17. The branch pipe 18 can inject air into the hollow block 19. The air in the hollow block 19 will enter the formed steering gear housing, thereby maintaining a certain air pressure inside the steering gear housing and assisting the movable core 7 to separate from the inner wall of the steering gear housing. Then, the movable core 7 on the left can drive the sliding frame 15 to move to the left and reset, so that the sliding frame 15 separates from the movable core 7 on the right.

[0034] like Figure 9 and Figure 10 As shown, it also includes a horizontal pipe 20, a fan 21, an air outlet pipe 22, and a translation assembly. The horizontal pipe 20 is provided on the front side of the mounting frame 3. The right end of the horizontal pipe 20 is a closed design. The fan 21 is installed on the left end of the horizontal pipe 20. Multiple air outlet pipes 22 are connected at intervals to the top and bottom of the horizontal pipe 20 and remain connected. The mounting frame 3 is provided with a translation assembly for driving the horizontal pipe 20 to move. The translation assembly includes a mounting base 23, a guide rod 24, a connecting plate 25, and an electric push rod 26. The mounting base 23 is connected to the middle of the mounting frame 3. The guide rods 24 are symmetrically slidably connected to the left and right sides of the mounting base 23. The connecting plate 25 is connected between the front ends of the two guide rods 24, and the front side of the connecting plate 25 is fixedly connected to the rear side of the horizontal pipe 20. The electric push rod 26 is installed in the middle of the mounting base 23, and the telescopic rod of the electric push rod 26 is connected to the connecting plate 25.

[0035] like Figure 9 As shown, it also includes a one-way valve 27 and a connecting pipe 28. The one-way valve 27 is installed on the top left side of the horizontal pipe 20, and the top of the one-way valve 27 is connected to the connecting pipe 28. The connecting pipe 28 is used to connect the mold release agent, and the one-way valve 27 is used to prevent air in the horizontal pipe 20 from entering the connecting pipe 28.

[0036] After the worker removes the molded steering gear housing from the fixed mold 2, the blower 21 can be started. The blower 21 blows air into the horizontal pipe 20, and the air in the horizontal pipe 20 is blown out through the air outlet pipe 22. At the same time, the connecting plate 25 can be driven forward by the electric push rod 26. The connecting plate 25 drives the horizontal pipe 20 and the air outlet pipe 22 to move forward. At this time, the air blown out from the upper and lower air outlet pipes 22 can clean the moving mold 5 and the fixed mold 2 respectively, to remove the debris remaining in the moving mold 5 and the fixed mold 2, and prevent the debris from affecting the next die casting. After cleaning, the connecting plate 25 is driven forward by the electric push rod 26. The connecting plate 25 moves backward to reset, and the connecting plate 25 drives the horizontal tube 20 and the air outlet tube 22 to move backward to reset. Then, the second hydraulic cylinder 10 drives the movable core 7 to move into the fixed mold 2. Then, the connecting pipe 28 delivers an appropriate amount of release agent into the horizontal tube 20. The electric push rod 26 drives the horizontal tube 20 and the air outlet tube 22 to move forward again. The air outlet tube 22 can evenly spray the release agent onto the fixed mold 2, the moving mold 5 and the movable core 7, thus preparing for the next die casting. Then, the electric push rod 26 drives the horizontal tube 20 and the air outlet tube 22 to move backward to reset, and controls the fan 21 to stop working.

[0037] like Figure 9 As shown, it also includes a collection frame 29 and a drain pipe 30. The collection frame 29 is connected to the middle of the mounting bracket 3. The collection frame 29 is located below the horizontal pipe 20, and the inner bottom of the collection frame 29 is sloping. The drain pipe 30 is connected to the bottom rear side of the collection frame 29 and remains connected.

[0038] After the air outlet duct 22 finishes spraying the release agent, the electric push rod 26 will drive the horizontal pipe 20 and the air outlet duct 22 to move backward and reset. At this time, the horizontal pipe 20 and the air outlet duct 22 are directly above the collection frame 29. The release agent remaining on the inner wall of the horizontal pipe 20 and the air outlet duct 22 will fall down into the collection frame 29 due to gravity, and flow down along the slope at the bottom of the collection frame 29 into the drain pipe 30, and finally be discharged through the drain pipe 30 for unified collection and recycling.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings, comprising: a base plate (1); a fixed mold (2) connected to the top of the base plate (1); a mounting bracket (3) connected to the top of the base plate (1); a first hydraulic cylinder (4) symmetrically mounted on the mounting bracket (3); a moving mold (5) connected to the telescopic rod of the first hydraulic cylinder (4), and the moving mold (5) being located directly above the fixed mold (2); and a gate (6) disposed on the moving mold (5); characterized in that, It also includes: a movable core (7), spaced apart on the fixed mold (2); a heat-conducting pipe (8), connected to the inside of the movable core (7); a spiral tube (9), connected to the inside of the heat-conducting pipe (8); a moving component, set on the base plate (1), used to drive the movable core (7) to move; and a conveying component, set on the spiral tube (9), used to convey cold water to the inside of the spiral tube (9). It also includes: a sliding frame (15), which is slidably connected to the interior of one of the movable cores (7), and the sliding frame (15) has square holes (1501) spaced apart around the perimeter; a connecting spring (16), which is connected to the sliding frame (15) and the movable core (7) at both ends respectively; an air supply pipe (17), which is connected to the sliding frame (15); a branch pipe (18), which is slidably connected to the end of the air supply pipe (17) and keeps it connected; and a hollow block (19), which is slidably connected to the branch pipe (18) and keeps it connected, and the hollow block (19) is located in the square hole (1501), and an air outlet (1901) is opened on the side of the hollow block (19).

2. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings according to claim 1, characterized in that, The moving component includes: a second hydraulic cylinder (10), which is spaced apart and installed on the top of the base plate (1); a guide frame (11), which is spaced apart and connected to the top of the base plate (1); a slider (12), which is slidably connected to the inside of the guide frame (11); a movable core (7) is fixedly connected to the slider (12); and the telescopic rod of the second hydraulic cylinder (10) is connected to the slider (12).

3. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings according to claim 2, characterized in that, The delivery assembly includes: an inlet pipe (13) connected to the guide frame (11), and the end of the inlet pipe (13) is connected to one end of the spiral tube (9) and remains in communication; and an outlet pipe (14) connected to the guide frame (11), and the end of the outlet pipe (14) is connected to the other end of the spiral tube (9) and remains in communication.

4. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings according to claim 1, characterized in that, It also includes: a horizontal tube (20), which is set on the side of the mounting frame (3); a fan (21), which is installed at one end of the horizontal tube (20); an air outlet tube (22), which is symmetrically and intermittently connected to the horizontal tube (20) and kept in communication; and a translation component, which is set on the mounting frame (3) and is used to drive the horizontal tube (20) to move.

5. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings according to claim 4, characterized in that, The translation component includes: a mounting base (23) connected to the mounting frame (3); a guide rod (24) symmetrically slidably connected to the mounting base (23); a connecting plate (25) connected to the end of the guide rod (24), and the connecting plate (25) is fixedly connected to the horizontal tube (20); and an electric push rod (26) installed on the mounting base (23), and the telescopic rod of the electric push rod (26) is connected to the connecting plate (25).

6. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings according to claim 4, characterized in that, It also includes: a one-way valve (27), installed on the horizontal pipe (20); and a connecting pipe (28), connected to the top of the one-way valve (27).

7. A high-precision multi-directional hydraulic core-pulling mold for forming complex steering gear housings according to claim 4, characterized in that, It also includes: a collection box (29), which is connected to the mounting bracket (3) and is located below the horizontal tube (20); and a drain tube (30), which is connected to the collection box (29) and remains in contact.

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