An automobile clutch housing extrusion casting mold

Abstract

This invention relates to the field of die-casting mold technology, specifically to an extrusion casting mold for an automotive clutch housing. It includes an upper mold and a lower mold below the upper mold. The lower mold has a recessed center on its upper surface. The upper mold has an annular upper mold groove at its center on its lower surface. The upper mold is movably and sealingly connected to the outer inner wall of the upper mold groove. The bottom of the upper mold groove and the lower surface of the upper mold both protrude downwards. The upper surface of the upper mold fits into the bottom of the upper mold groove. This invention, through the movable sealing connection between the upper mold and the upper mold groove, and between the lower mold and the lower mold groove, and the elastic restoring action of the upper and lower springs, combined with the dynamic formation and disappearance of the upper and lower cooling cavities, ensures that both the upper and lower cooling cavities return to zero during die-casting, guaranteeing the support strength of the upper and lower molds and the overall pressure-bearing capacity of the mold. During mold opening and cooling, the upper and lower cooling cavities form synchronously and are adjacent to the mold cavity, improving cooling efficiency.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, specifically to an extrusion casting mold for an automotive clutch housing. Background Technology

[0002] The clutch housing is a core component of the automotive transmission system, and its quality directly affects driving safety. As automobiles move towards lightweight and high-performance designs, the requirements for manufacturing precision are increasingly stringent. Extrusion casting, a method of solidifying molten metal under pressure after injection into a mold cavity, reduces defects such as porosity and shrinkage cavities in castings, improves density and mechanical properties, and can replace some forging processes in the production of complex, high-performance parts. Therefore, the demand for extrusion casting molds has surged. Extrusion casting molds must withstand a certain pressure during the casting process, placing clear requirements on the mold's own strength. In existing molds, cooling channels are the core of the cooling system; their layout, number, and distance from the mold cavity determine the cooling effect. A rational design of the cooling system is crucial for the application of this process. Currently, extrusion casting has become the mainstream process for clutch housing production. Although mold technology is being optimized, bottlenecks still need to be addressed.

[0003] The core technical problem of existing molds lies in the design of cooling channels. Because molds need to withstand a certain pressure, the channel design must balance cooling effect and mold strength. If the channel is placed close to the cavity to improve the cooling effect, only narrow or fewer channels can be set, otherwise it will damage the mold structure, reduce the pressure-bearing capacity, and cause mold deformation and damage. If the number of channels is increased to improve the cooling effect, the mold strength will be weakened, unable to meet the pressure requirements and increase the processing difficulty. If the channel is far away from the cavity, although the mold strength can be guaranteed, the cooling efficiency will be reduced, the solidification time will be prolonged, and the probability of casting defects will be increased. Technicians have tried to optimize the channel aperture and layout, but they still cannot resolve the contradiction between the two, which restricts the upgrading of the process and the improvement of product quality. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes an extrusion casting mold for automotive clutch housings. This invention utilizes the movable sealing connection between the upper mold and the upper mold groove, and the lower mold and the lower mold groove, along with the elastic restoring action of the upper and lower springs. Combined with the dynamic formation and disappearance of the upper and lower cooling cavities, this ensures that both the upper and lower cooling cavities return to zero during die casting, guaranteeing the support strength of the upper and lower molds and the overall pressure-bearing capacity of the mold. During mold opening and cooling, the upper and lower cooling cavities form synchronously and are adjacent to the mold cavity, improving cooling efficiency and shortening solidification time. This resolves the contradiction between the cooling effect and mold strength in existing molds, thereby reducing casting defects and improving the quality of the clutch housing.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: An extrusion casting mold for an automotive clutch housing, comprising an upper mold and a lower mold below the upper mold; the lower mold has a recessed center on its upper surface; the upper mold has an annular upper mold groove at its lower surface; the upper mold is movably and sealingly connected to the outer inner wall of the upper mold groove; the bottom of the upper mold groove and the lower surface of the upper mold both protrude downwards; the upper surface of the upper mold fits into the bottom of the upper mold groove; the bottom of the upper mold groove has an upper clearance hole; the bottom of the upper clearance hole is connected to the upper surface of the upper mold by an upper spring; the lower mold has a lower mold groove corresponding to the upper mold groove at its upper surface. The lower mold groove is movably and sealedly connected to a corresponding lower mold; the bottom of the lower mold groove is provided with a lower clearance hole; the bottom of the lower clearance hole is connected to the lower surface of the lower mold by a lower spring; after the upper and lower surfaces of the upper mold and the upper surface of the lower mold are closed, a cavity for extrusion casting is formed; the guide post fixedly connected to the upper surface of the lower mold is slidably and sealedly connected to the guide hole on the lower surface of the upper mold; a liquid inlet connector is provided on one side of the lower mold; the liquid inlet connector passes through the lower mold, the guide post, and the upper mold through the liquid inlet hole, connecting the upper mold groove and the lower mold groove; a liquid outlet connector is provided on the other side of the lower mold; the liquid outlet connector passes through the lower mold, the guide post, and the upper mold through the liquid outlet hole, connecting the upper mold groove and the lower mold groove.

[0006] Preferably, an upper clearance rod is movably connected within the upper clearance hole; one end of the upper spring abuts against the bottom of the upper clearance hole, and the other end abuts against the upper end of the upper clearance rod; the lower end of the upper clearance rod is fixedly connected to the upper surface of the upper mold; the contact surface between the upper mold and the upper mold groove is a rotating surface; an upper spiral groove is provided on the inner wall of the upper clearance hole; an upper groove block fixedly connected to the upper clearance rod is movably connected within the upper spiral groove; a lower clearance rod is movably connected within the lower clearance hole; one end of the lower spring abuts against the bottom of the lower clearance hole, and the other end abuts against the lower end of the lower clearance rod; the upper end of the lower clearance rod is fixedly connected to the lower surface of the lower mold; the contact surface between the lower mold and the lower mold groove is a rotating surface; a lower spiral groove is provided on the inner wall of the lower clearance hole; a lower groove block fixedly connected to the lower clearance rod is movably connected within the lower spiral groove.

[0007] Preferably, the upper and lower spiral grooves are symmetrically arranged; the upper and lower clearance rods rotate in the same direction.

[0008] Preferably, the upper surface of the upper mold is provided with an upper spring groove; a plurality of upper spring grooves are evenly distributed on the upper surface of the upper mold; one end of the upper spring groove is fixedly connected to one end of the upper spring sheet, and the other end of the upper spring sheet can elastically extend out of the upper spring groove; the specifications of the upper spring sheet are adapted to the shape of the upper spring groove.

[0009] Preferably, the lower surface of the lower mold is provided with a lower spring groove; a plurality of lower spring grooves are evenly distributed on the lower surface of the lower mold; one end of the lower spring groove is fixedly connected to one end of the lower spring piece, and the other end of the lower spring piece can elastically extend out of the lower spring groove; the specifications of the lower spring piece are adapted to the shape of the lower spring groove.

[0010] Preferably, the lower surface of the upper mold is provided with a hemispherical synchronization groove; a hemispherical synchronization block is fixedly connected to the upper surface of the lower mold; the specifications of the synchronization block are adapted to the specifications of the synchronization groove.

[0011] Preferably, the liquid inlet is connected in series with a first switching groove; the first switching groove is located near the liquid inlet connector; a first switching block is rotatably and sealed within the first switching groove; a T-shaped hole is provided on the outer wall and inside of the first switching block; the first switching block is driven by a first hydraulic motor; the liquid outlet is connected in series with a second switching groove; the second switching groove is located near the liquid outlet connector; a second switching block is rotatably and sealed within the second switching groove; a through hole is provided on the outer wall and inside of the second switching block; the second switching block is driven by a second hydraulic motor; an air inlet is provided through the first switching groove to the outward; the air inlet is perpendicular to the liquid inlet around the first switching groove; the T-shaped hole on the first switching block can switch the opening and closing of the air inlet and the liquid inlet.

[0012] Preferably, the upper clearance bar has an upper disassembly groove on its arc-shaped outer wall near the upper mold; the upper disassembly groove is threadedly connected to the upper mold with an upper bolt facing downwards; the lower clearance bar has a lower disassembly groove on its arc-shaped outer wall near the lower mold; the lower disassembly groove is threadedly connected to the lower mold with a lower bolt facing upwards; the bottom of the upper clearance hole is rotatably connected to a hole platform through a hole groove; the cross-sectional shape of the hole groove and the hole platform is an inverted trapezoid; one end of the upper spring is fixedly connected to the hole platform, and the other end is fixedly connected to the upper clearance bar.

[0013] Preferably, a one-way inlet valve is provided near the inlet connector of the liquid inlet hole; and a one-way outlet valve is provided near the outlet connector of the liquid outlet hole.

[0014] Preferably, a chip removal gap is left between the upper mold and the lower mold after die casting.

[0015] The beneficial effects of this invention are as follows: 1. This invention utilizes the movable sealing connection between the upper mold and the upper mold groove, and the lower mold and the lower mold groove, along with the elastic reset action of the upper and lower springs, and the dynamic formation and disappearance of the upper and lower cooling cavities. This ensures that both the upper and lower cooling cavities return to zero during die casting, guaranteeing the support strength of the upper and lower molds and the overall pressure-bearing capacity of the mold. During mold opening and cooling, the upper and lower cooling cavities are formed synchronously and closely adjacent to the mold cavity, improving cooling efficiency and shortening solidification time. This resolves the contradiction between the cooling effect and mold strength in existing molds, thereby reducing casting defects and improving the quality of the clutch housing.

[0016] 2. This invention utilizes the cooperation of the upper clearance bar, the upper groove block and the upper spiral groove, the lower clearance bar, the lower groove block and the lower spiral groove, and the symmetrical rotation direction of the upper and lower spiral grooves to drive the upper mold and the lower mold to rotate synchronously, so that the molten metal liquid can fully fill the cavity gap, and at the same time make the product in the cavity cool more evenly.

[0017] 3. This invention utilizes the interlocking of the hemispherical synchronous groove on the lower surface of the upper mold and the hemispherical synchronous block on the upper surface of the lower mold, combined with the functions of the upper spiral groove, the lower spiral groove, and the clearance rod, to ensure that the upper mold and the lower mold always rotate synchronously. This causes the upper cooling cavity and the lower cooling cavity to increase or decrease synchronously, ensuring uniform distribution of coolant and improving the consistency of cooling of the product in the upper and lower parts of the cavity. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 A sectional view; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 yes Figure 2 Enlarged view of point B in the middle; Figure 5 This is a location diagram of the synchronization block of the present invention; Figure 6 This is a diagram showing the location of the synchronization slot in this invention; Figure 7 This is a diagram showing the position of the upper spring groove in this invention; Figure 8 This is a diagram showing the position of the lower spring groove in this invention; Figure 9 This is a structural diagram of the first switching block in this invention; Figure 10 This is a structural diagram of the second switching block in this invention.

[0020] In the diagram: Upper mold 1, Upper mold groove 11, Upper clearance hole 12, Upper spiral groove 121, Upper spring 13, Guide hole 14, Hole groove 15, Hole platform 16, Chip removal gap 17; Lower mold 2, Lower mold groove 21, Lower clearance hole 22, Lower spiral groove 221, Lower spring 23, Guide post 24, Liquid inlet connector 25, Liquid inlet hole 26, First switching groove 261, Air inlet hole 262, One-way liquid inlet valve 263, Liquid outlet connector 27, Liquid outlet hole 28, Second switching groove 281. One-way liquid outlet valve 282, upper mold 3, upper spring groove 31, upper spring piece 32, synchronization groove 33, cavity 34, lower mold 4, lower spring groove 41, lower spring piece 42, synchronization block 43, upper clearance bar 5, upper groove block 51, upper disassembly groove 52, upper bolt 53, lower clearance bar 6, lower groove block 61, lower disassembly groove 62, lower bolt 63, first switching block 7, first hydraulic motor 71, T-shaped hole 72, second switching block 8, second hydraulic motor 81, straight through hole 82. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 10 As shown, the present invention includes the following embodiments: Example 1: An extrusion casting mold for an automotive clutch housing includes an upper mold 1 and a lower mold 2 below the upper mold 1; the upper surface of the lower mold 2 is recessed at the center; the lower surface of the upper mold 1 has an annular upper mold groove 11 at the center; the outer inner wall of the upper mold groove 11 is movably and sealingly connected to an upper mold 3; the bottom of the upper mold groove 11 and the lower surface of the upper mold 3 both protrude downwards; the upper surface of the upper mold 3 fits with the bottom of the upper mold groove 11; the bottom of the upper mold groove 11 has an upper clearance hole 12; the bottom of the upper clearance hole 12 is connected to the upper surface of the upper mold 3 by an upper spring 13; the upper surface of the lower mold 2 has a lower mold groove 21 corresponding to the upper mold groove 11 at the center; the lower mold groove 21 is movably and sealingly connected to a corresponding lower mold. 4; The bottom of the lower mold groove 21 is provided with a lower clearance hole 22; The bottom of the lower clearance hole 22 is connected to the lower surface of the lower mold 4 by a lower spring 23; After the upper and lower surfaces of the upper mold 3 and the upper surface of the lower mold 4 are closed, a cavity 34 for extrusion casting is formed; The guide post 24 fixedly connected to the upper surface of the lower mold 2 is slidably sealed to the guide hole 14 on the lower surface of the upper mold 1; One side of the lower mold 2 is provided with a liquid inlet connector 25; The liquid inlet connector 25 passes through the lower mold 2, the guide post 24, and the upper mold 1 through the liquid inlet hole 26 and connects to the upper mold groove 11 and the lower mold groove 21; The other side of the lower mold 2 is provided with a liquid outlet connector 27; The liquid outlet connector 27 passes through the lower mold 2, the guide post 24, and the upper mold 1 through the liquid outlet hole 28 and connects to the upper mold groove 11 and the lower mold groove 21.

[0023] First, the casting mold is installed: the extrusion casting mold is assembled onto the special casting equipment. The bottom surface of the lower mold 2 is fixed to the workbench (casting table) of the casting equipment through a suitable connecting structure. The top of the upper mold 1 is fixedly connected to the hydraulic cylinder (or similar telescopic actuator) on the top of the casting equipment that can extend and retract vertically through a connecting structure. At the same time, the cooling pipe of the external cooling system is connected to the liquid inlet connector 25 on one side of the lower mold 2, and the return pipe is connected to the liquid outlet connector 27 on the other side of the lower mold 2. The assembly and debugging of the entire equipment and mold are completed, ensuring that all connection parts are well sealed and that the moving parts slide smoothly.

[0024] After installation, the mold opening stage begins. The hydraulic cylinder (not shown in the figure) controlling the casting equipment shortens, causing the upper mold 1 to move upwards as a whole. During the movement of the upper mold 1, the guide hole 14 on its lower surface slides relative to the guide post 24 fixedly connected to the upper surface of the lower mold 2 (the guide post 24 never disengages from the guide hole 14, only undergoes relative displacement). As the upper mold 1 continues to move upwards, the upper spring 13 between the bottom of the upper mold groove 11 and the upper surface of the upper mold 3 gradually releases its elastic force, pushing the upper mold 3 outwards, causing the upper mold 3 to gradually move away from the bottom of the upper mold groove 11, forming a gap between them. This gap is defined as the upper cooling cavity. At the same time, the lower mold groove 21... The lower spring 23 between the bottom and the lower surface of the lower mold 4 also releases its elastic force, pushing the lower mold 4 upward, so that the lower mold 4 gradually moves away from the bottom of the lower mold groove 21, forming a gap between the two, which is defined as the lower cooling cavity; until the upper mold 1 moves to the preset limit position, the upper mold 3 and the lower mold 4 are completely separated, and the cavity 34 is fully opened. At this time, both the upper cooling cavity and the lower cooling cavity are in the maximum volume state, preparing for subsequent casting; next, the casting operation is carried out. Since the upper surface of the lower mold 4 is concave, it can stably hold the molten metal. The operator slowly pours the prepared molten metal into the concave part of the upper surface of the lower mold 4 to complete the casting step.

[0025] After casting is completed, the mold closing and die-casting stage begins. The hydraulic cylinder extends, causing the upper mold 1 to move downwards. During this downward movement, the guide hole 14 and guide post 24 continue to slide relative to each other. The upper mold 3 moves downwards along with the upper mold 1, gradually approaching and contacting the lower mold 4, thus sealing the cavity 34. The continuous downward movement of the upper mold 1 generates extrusion pressure. The upper mold 3, subjected to the reaction force of the lower mold 4, gradually overcomes the elastic force of the upper spring 13 and retracts into the upper mold groove 11 until the upper surface of the upper mold 3 completely fits the bottom of the upper mold groove 11, and the volume of the upper cooling cavity gradually shrinks to zero. Simultaneously, the lower mold 4 is subjected to the reaction force of the upper mold... The extrusion force of the upper mold 3 gradually overcomes the elastic force of the lower spring 23 and retracts into the lower mold groove 21 until the lower surface of the lower mold 4 is completely fitted with the bottom of the lower mold groove 21, and the volume of the lower cooling cavity is reduced to zero. Then the upper mold 3 and the lower mold 4 begin to extrude. The cavity 34 formed by the upper and lower surfaces of the two is completely matched with the shape of the car clutch housing. The upper mold 1 provides stable support for the upper mold 3 and the lower mold 2 provides stable support for the lower mold 4, ensuring the overall pressure bearing capacity of the mold. Subsequently, the hydraulic cylinder continuously applies pressure, so that the molten metal inside the cavity 34 is formed under pressure, completing the extrusion casting process.

[0026] After die casting is completed, the cooling stage begins. The hydraulic cylinder shortens, causing the upper mold 1 to move upward again. The guide hole 14 slides relative to the guide post 24, and the upper spring 13 and lower spring 23 release their elastic force again, pushing the upper mold 3 and lower mold 4 away from the bottom of their respective mold grooves. The upper and lower cooling cavities reform and gradually increase in size. At this time, the external cooling system is activated, and the coolant enters the inlet hole 26 through the inlet connector 25. The inlet hole 26 passes through the lower mold 2, guide post 24, and upper mold 1 in sequence, delivering the coolant to the bottom of the guide hole 14, and then diverting it into the upper cooling cavity. At the same time, the coolant also enters the lower cooling cavity along the inlet hole 26. The coolant flows in the upper and lower cooling cavities, fully contacting the surfaces of the upper and lower molds 4, and quickly carrying away the coolant. The heat from the mold and the internal forming castings is used to achieve rapid cooling of the castings. The coolant, after absorbing heat, is collected through the outlet hole 28 and flows into the return pipe through the outlet connector 27, completing the cooling cycle. Since the upper and lower cooling chambers are adjacent to the mold cavity 34, the cooling efficiency is much higher than that of conventional cooling channels, which can effectively shorten the solidification time and reduce defects such as porosity and shrinkage cavities in the castings. After the castings have cooled to the preset temperature, the hydraulic cylinder is controlled to continue to shorten, driving the upper mold 1 and the upper die 3 to move further upward, so that the upper and lower molds 4 are completely separated and the mold cavity 34 is fully opened. The operator removes the cooled and formed automobile clutch housing from the upper surface of the lower mold 4, completing a complete extrusion casting operation. Subsequently, the above steps of mold opening, casting, mold closing, die casting, cooling, and demolding can be repeated to achieve mass production.

[0027] This invention utilizes the movable sealing connection between the upper mold 3 and the upper mold groove 11, and the lower mold 4 and the lower mold groove 21, along with the elastic reset action of the upper spring 13 and the lower spring 23, and the dynamic formation and disappearance of the upper and lower cooling cavities. This ensures that both the upper and lower cooling cavities return to zero during die casting, guaranteeing the support strength of the upper mold 3 and the lower mold 4 and the overall pressure bearing capacity of the mold. During mold opening and cooling, the upper and lower cooling cavities are formed synchronously and are adjacent to the cavity 34, improving cooling efficiency and shortening solidification time. This resolves the contradiction between the cooling effect and mold strength of existing molds, thereby reducing casting defects and improving the quality of the clutch housing.

[0028] Example 2: An upper clearance rod 5 is movably connected within the upper clearance hole 12; one end of the upper spring 13 abuts against the bottom of the upper clearance hole 12, and the other end abuts against the upper end of the upper clearance rod 5; the lower end of the upper clearance rod 5 is fixedly connected to the upper surface of the upper mold 3; the contact surface between the upper mold 3 and the upper mold groove 11 is a rotating surface; an upper spiral groove 121 is provided on the inner wall of the upper clearance hole 12; an upper groove block fixedly connected to the upper clearance rod 5 is movably connected within the upper spiral groove 121. 51; The lower clearance rod 6 is movably connected inside the lower clearance hole 22; One end of the lower spring 23 abuts against the bottom of the lower clearance hole 22, and the other end abuts against the lower end of the lower clearance rod 6; The upper end of the lower clearance rod 6 is fixedly connected to the lower surface of the lower mold 4; The contact surface between the lower mold 4 and the lower mold groove 21 is a rotating surface; The inner wall of the lower clearance hole 22 is provided with a lower spiral groove 221; The lower groove block 61, which is fixedly connected to the lower clearance rod 6, is movably connected inside the lower spiral groove 221.

[0029] In this embodiment, the upper spiral groove 121 and the lower spiral groove 221 are symmetrically arranged; the upper clearance rod 5 and the lower clearance rod 6 rotate in the same direction.

[0030] After casting is completed, the hydraulic cylinder controlling the casting equipment extends, causing the upper mold 1 to move downwards as a whole. The upper mold 3 moves downwards along with the upper mold 1, and the protruding part of the upper mold 3 enters the recessed part of the lower mold 4. The vertical edge of the protruding part of the upper mold 3 and the vertical edge of the recessed part of the lower mold 4 form a movable seal, that is, the cavity 34 is sealed. As the upper mold 1 continues to move downwards, it generates extrusion pressure. The upper mold 3 is subjected to the reaction force of the lower mold 4 and begins to overcome the elastic force of the upper spring 13, gradually shrinking. Returning to the upper mold groove 11, during this process, the upper clearance rod 5, which is fixedly connected to the upper surface of the upper mold 3, moves upward in the upper clearance hole 12. Since the upper groove block 51, which is fixedly connected to the upper clearance rod 5, is movably connected to the upper spiral groove 121 on the inner wall of the upper clearance hole 12, when the upper clearance rod 5 moves upward, the upper groove block 51 will move along the trajectory of the upper spiral groove 121, thereby driving the upper clearance rod 5 to rotate. The rotation of the upper clearance rod 5 synchronously drives the upper mold 3, which is fixedly connected to it, to rotate together.

[0031] At the same time, the lower mold 4, subjected to the squeezing force of the upper mold 3, begins to overcome the elastic force of the lower spring 23 and gradually retracts downward into the lower mold groove 21. Simultaneously, the lower relief rod 6, fixedly connected to the lower surface of the lower mold 4, moves downward within the lower relief hole 22. The lower groove block 61, fixedly connected to the lower relief rod 6, is movably connected to the lower spiral groove 221 on the inner wall of the lower relief hole 22. When the lower relief rod 6 moves downward, the lower groove block 61 moves along the trajectory of the lower spiral groove 221, thereby causing the lower relief rod 6 to rotate. The rotation of the lower clearance rod 6 synchronously drives the lower mold 4, which is fixedly connected to it, to rotate together; the upper spiral groove 121 and the lower spiral groove 221 are symmetrically arranged, and the rotation direction of the upper clearance rod 5 and the lower clearance rod 6 is consistent. During the synchronous rotation of the upper mold 3 and the lower mold 4, the molten metal liquid that has not yet solidified in the cavity 34 will rotate along with it under the drive of the mold rotation, which can more fully fill the gaps of the cavity 34 and avoid the situation of incomplete filling, thus laying the foundation for the subsequent casting quality.

[0032] As the upper mold 1 continues to move downwards, the upper mold 3 completely retracts into the upper mold groove 11, and the lower mold 4 completely retracts into the lower mold groove 21. The volumes of the upper and lower cooling chambers are reduced to zero. The upper mold 1 provides stable support for the upper mold 3, and the lower mold 2 provides stable support for the lower mold 4. The hydraulic cylinder continuously applies pressure to complete the extrusion casting process of the molten metal in the cavity 34. During this stage, the upper mold 3 and the lower mold 4 stop rotating. After the die casting is completed, the hydraulic cylinder is shortened, causing the upper mold 1 to move upwards. The upper spring 13 and the lower spring 23 begin to release their elasticity and enter the reset state. The upper spring 13 pushes the upper mold 3 away from the bottom of the upper mold groove 11, and simultaneously drives the upper groove block 51 on the outer wall of the upper relief bar 5 to move in the opposite direction along the upper spiral groove 121. The movement causes the upper clearance bar 5 to rotate in the opposite direction, which in turn causes the upper mold 3 to rotate in the opposite direction. The lower spring 23 pushes the lower mold 4 to move upward (away from the bottom of the lower mold groove 21), which simultaneously causes the lower clearance bar 6 to move upward. The lower groove block 61 moves in the opposite direction along the lower spiral groove 221, causing the lower clearance bar 6 to rotate in the opposite direction, which in turn causes the lower mold 4 to rotate in the opposite direction. Since the upper spiral groove 121 and the lower spiral groove 221 are symmetrically arranged, the opposite rotation directions of the upper mold 3 and the lower mold 4 are still consistent, ensuring that the cavity 34 rotates synchronously with the preliminarily solidified casting inside, avoiding relative movement between the upper mold 3, the lower mold 4 and the casting, preventing problems such as mold misalignment and deformation of the cavity 34, and ensuring the forming accuracy of the casting.

[0033] To further enhance the cooling effect, a one-way inlet valve 263 can be installed at the inlet hole 26 of the upper mold 1, and a one-way outlet valve 282 can be installed at the outlet hole 28. During the cooling stage, by controlling the upper mold 1 to move back and forth up and down, the upper mold 3 and the lower mold 4 are driven to repeatedly approach and move away from their respective upper mold groove 11 and lower mold groove 21, causing the volume of the upper and lower cooling chambers to increase and decrease back and forth. When the volume of the upper and lower cooling chambers increases, the internal air pressure decreases, the one-way inlet valve 263 opens, and the one-way outlet valve 282 closes, allowing new coolant to enter the cooling chamber through the inlet connector 25 and the inlet hole 26. When the volume of the upper and lower cooling chambers decreases, the internal air pressure increases, the one-way inlet valve 263 closes, and the one-way outlet valve 282 opens, allowing the used coolant to be discharged through the outlet hole 28 and the outlet connector 27, thus achieving cooling. The unidirectional circulation of the liquid ensures that the coolant in the cooling chamber is completely renewed, preventing the waste coolant from affecting the cooling effect. During this process, the upper mold 3 and the lower mold 4 rotate synchronously in the forward and reverse directions as the volume of the cooling chamber changes. This ensures that the cavity 34 and the internal casting are always in a rotating state during the cooling and solidification process, allowing for more uniform contact with the coolant in the cooling chamber and achieving uniform cooling of the casting. This further reduces casting defects caused by uneven cooling. After cooling is complete, the casting in the cavity 34 is completely solidified. The hydraulic cylinder is then controlled to continue shortening, driving the upper mold 1 and the upper mold 3 to move further upward. The upper mold 3 and the lower mold 4 are completely separated, completing the demolding. The operator removes the cooled and solidified car clutch housing from the upper surface of the lower mold 4, thus completing one extrusion casting operation. The above actions can be repeated to achieve mass production.

[0034] The present invention utilizes the cooperation of the upper clearance rod 5, the upper groove block 51 and the upper spiral groove 121, the lower clearance rod 6, the lower groove block 61 and the lower spiral groove 221, and the rotation direction of the upper spiral groove 121 and the lower spiral groove 221 to drive the upper mold 3 and the lower mold 4 to rotate synchronously, so that the molten metal liquid fully fills the gap of the cavity 34, and at the same time makes the product in the cavity 34 cool more evenly.

[0035] Example 3: The upper surface of the upper mold 3 is provided with an upper spring groove 31; a plurality of upper spring grooves 31 are evenly distributed on the upper surface of the upper mold 3; one end of the upper spring groove 31 is fixedly connected to one end of the upper spring piece 32, and the other end of the upper spring piece 32 can elastically extend out of the upper spring groove 31; the specifications of the upper spring piece 32 are adapted to the shape of the upper spring groove 31.

[0036] In this embodiment, a lower spring groove 41 is provided on the lower surface of the lower mold 4; a plurality of lower spring grooves 41 are evenly distributed on the lower surface of the lower mold 4; one end of the lower spring groove 41 is fixedly connected to one end of the lower spring piece 42, and the other end of the lower spring piece 42 can elastically extend out of the lower spring groove 41; the specifications of the lower spring piece 42 are adapted to the shape of the lower spring groove 41.

[0037] After die casting is completed, the cooling and solidification stage begins. The hydraulic cylinder is shortened, causing the upper mold 1 to move upward. The upper spring 13 begins to release its elastic force. At the same time, the upper spring pieces 32 in the upper spring grooves 31, which are evenly distributed on the upper surface of the upper mold 3, extend elastically from the upper spring grooves 31 under their own elastic force. Under the combined action of the elastic force of the single upper spring 13 and the elastic force of the multiple upper spring pieces 32, the upper mold 3 is evenly stressed and gradually moves away from the bottom of the upper mold groove 11. During this process, the volume of the upper cooling cavity gradually increases. As the upper mold 3 moves away from the bottom of the upper mold groove 11, it rotates due to the cooperation of the upper clearance rod 5, the upper groove block 51 and the upper spiral groove 121. This rotation drives the upper spring pieces 32 extending from the upper spring grooves 31 to rotate as well. The rotating upper spring pieces 32 agitate the coolant entering the upper cooling cavity, making the coolant distribution more uniform.

[0038] Meanwhile, the lower spring 23 releases its elastic force, and the lower spring pieces 42 in the multiple evenly distributed lower spring grooves 41 on the lower surface of the lower mold 4 elastically extend their other ends out of the lower spring grooves 41 under their own elastic force. Under the combined action of the elastic force of the single lower spring 23 and the elastic force of the multiple lower spring pieces 42, the lower mold 4 is evenly stressed and gradually moves away from the bottom of the lower mold groove 21. During this process, the volume of the lower cooling cavity gradually increases. As the lower mold 4 moves away from the bottom of the lower mold groove 21, it rotates due to the cooperation of the lower avoidance rod 6, the lower groove block 61 and the lower spiral groove 221. This rotation drives the lower spring pieces 42 extending out of the lower spring grooves 41 to rotate as well. The rotating lower spring pieces 42 agitate the coolant entering the lower cooling cavity, further making the coolant distribution more uniform. During the cooling stage, the upper mold 1 is controlled to move back and forth up and down, causing the upper mold 3 and the lower mold 4 to repeatedly approach and move away from each groove. From the corresponding upper mold groove 11 and lower mold groove 21, the upper spring piece 32 continuously agitates the coolant as the upper mold 3 moves and rotates, and the lower spring piece 42 synchronously and continuously agitates the coolant as the lower mold 4 moves and rotates, ensuring that the coolant is in full contact with the upper and lower molds 4 and the casting inside the cavity 34, achieving uniform cooling; when it is necessary to close the mold for the next die casting, the upper mold 1 moves down, and the upper mold 3 is subjected to the reaction force of the lower mold 4, gradually overcoming the elastic force of the upper spring 13 and the upper spring piece 32 and retracting into the upper mold groove 11. The upper spring piece 32 is retracted into the upper spring groove 31 under the squeezing action. At the same time, the lower mold 4 is subjected to the reaction force of the upper mold 3, gradually overcoming the elastic force of the lower spring 23 and the lower spring piece 42 and retracting into the lower mold groove 21. The lower spring piece 42 is retracted into the lower spring groove 41 under the squeezing action. After the upper and lower molds 4 are completely fitted together, the die casting process is carried out.

[0039] This invention utilizes the cooperation of the upper spring groove 31 and upper spring piece 32 evenly distributed on the upper mold 3, and the lower spring groove 41 and lower spring piece 42 evenly distributed on the lower mold 4, combined with the elastic force of the upper spring 13 and lower spring 23, so that the upper mold 3 and lower mold 4 are evenly stressed as they move away from the bottom of the corresponding mold groove, effectively reducing their deformation probability. At the same time, the spring piece that rotates with the upper mold 3 and lower mold 4 can agitate the coolant in the cooling chamber, making the coolant distribution more uniform, thereby improving the cooling uniformity of the casting.

[0040] Example 4: The lower surface of the upper mold 3 is provided with a hemispherical synchronization groove 33; the upper surface of the lower mold 4 is fixedly connected with a hemispherical synchronization block 43; the specifications of the synchronization block 43 are adapted to the specifications of the synchronization groove 33, and their positions correspond.

[0041] After casting is completed, the hydraulic cylinder of the casting equipment extends, driving the upper mold 1 to move downward as a whole. The upper mold 3 moves down with the upper mold 1 until it contacts the lower mold 4. At this time, the hemispherical synchronous groove 33 on the lower surface of the upper mold 3 and the hemispherical synchronous block 43 fixedly connected to the upper surface of the lower mold 4 interlock and cooperate to achieve precise positioning of the upper mold 3 and the lower mold 4. When entering the die-casting stage, the upper mold 1 continues to move downward to generate extrusion force. The upper mold 3 overcomes the elastic force of the upper spring 13 and retracts into the upper mold groove 11, and the lower mold 4 overcomes the elastic force of the lower spring 23 and retracts into the lower mold groove 21.

[0042] During this process, the upper mold 3 rotates due to the interaction of the upper clearance bar 5, the upper groove block 51 with the upper spiral groove 121, the lower clearance bar 6, the lower groove block 61 with the lower spiral groove 221. Because of the insertion and engagement of the synchronous groove 33 and the synchronous block 43, the rotation of the upper mold 3 drives the lower mold 4 to rotate synchronously, ensuring that their rotation rhythms are consistent. After die casting is completed, the cooling stage begins. The hydraulic cylinder is shortened, causing the upper mold 1 to move upwards. The upper spring 13 and the lower spring 23 release their elasticity, pushing the upper mold 3 and the lower mold 4 away from the bottom of their respective upper mold groove 11 and lower mold groove 21. At this time, the synchronous groove 33 and the synchronous block 43 still maintain their insertion and engagement. When the upper mold 3 rotates in the opposite direction, it synchronously drives the lower mold 4 to rotate in the opposite direction, causing the upper and lower cooling chambers to increase synchronously. The coolant is ensured to enter the two cooling chambers simultaneously and fill them evenly. During the cooling stage, the upper mold 1 is controlled to move back and forth up and down, causing the upper mold 3 and lower mold 4 to repeatedly approach and move away from the bottom of their respective upper mold groove 11 and lower mold groove 21. With the cooperation of the synchronization groove 33 and the synchronization block 43, the upper mold 3 and lower mold 4 always maintain synchronous rotation, and the upper and lower cooling chambers increase or decrease synchronously, avoiding the problem of uneven coolant distribution caused by one cooling chamber being larger and the other smaller. During this process, the insertion and cooperation of the synchronization groove 33 and the synchronization block 43 further restricts the relative movement of the upper mold 3 and lower mold 4, preventing relative displacement between the two and the preliminarily solidified casting in the cavity 34, preventing mold misalignment, and ensuring the structural stability of the cavity 34.

[0043] This invention utilizes the hemispherical synchronous groove 33 on the lower surface of the upper mold 3 and the hemispherical synchronous block 43 on the upper surface of the lower mold 4 for insertion and engagement. Combined with the functions of the upper spiral groove 121, the lower spiral groove 221, and the clearance rod, the upper mold 3 and the lower mold 4 are kept rotating synchronously. This causes the upper and lower cooling cavities to increase or decrease synchronously, ensuring uniform distribution of coolant and improving the consistency of cooling of the product in the upper and lower parts of the cavity 34.

[0044] Example 5: The liquid inlet 26 is connected in series with the first switching groove 261; the first switching groove 261 is located near the liquid inlet connector 25; the first switching block 7 is rotatably and sealed within the first switching groove 261; a T-shaped hole 72 is provided on the outer wall and inside of the first switching block 7; the first switching block 7 is driven by the first hydraulic motor 71; the liquid outlet 28 is connected in series with the second switching groove 281; the second switching groove 281 is located near the liquid outlet connector 27; the second switching block 8 is rotatably and sealed within the second switching groove 281; a through hole 82 is provided on the outer wall and inside of the second switching block 8; the second switching block 8 is driven by the second hydraulic motor 81; an air inlet 262 is provided through the first switching groove 261; the air inlet 262 is perpendicular to the liquid inlet 26 around the first switching groove 261; the T-shaped hole 72 on the first switching block 7 can switch the opening and closing of the air inlet 262 and the liquid inlet 26.

[0045] Before casting, the upper mold 3 and the lower mold 4 are in a state of being far apart. At this time, the first hydraulic motor 71 drives the first switching block 7 to rotate in the first switching groove 261, so that the T-shaped hole 72 on the first switching block 7 connects the air inlet 262 with the upper cooling chamber and the lower cooling chamber, and at the same time, it makes the liquid inlet connector 25 staggered from the upper cooling chamber and the lower cooling chamber, ensuring that the liquid inlet connector 25 is not connected to the upper cooling chamber and the lower cooling chamber. Then the operator performs the casting operation, pouring the molten metal into the recessed area on the upper surface of the lower mold 4. After casting is completed, the upper mold 1 is controlled to move down, and the upper mold 3 moves down with the upper mold 1. The volume of the upper cooling chamber and the lower cooling chamber gradually decreases, and the gas in the upper cooling chamber, the lower cooling chamber and the guide hole 14 is discharged along the air inlet 262. The upper mold 1 continues to move down, and after the mold is closed, it enters the die casting stage. The hydraulic cylinder continuously applies pressure, so that the molten metal in the cavity 34 is formed under pressure. After the die casting process is completed, it enters the cooling stage. In the cooling phase, the first hydraulic motor 71 and the second hydraulic motor 81 are controlled to drive the first switching block 7 and the second switching block 8 to rotate respectively. The rotation of the first switching block 7 causes the air inlet 262 to be misaligned with the upper and lower cooling chambers, and at the same time, it connects the liquid inlet connector 25 to the upper and lower cooling chambers through the T-shaped hole 72. The rotation of the second switching block 8 causes the straight through hole 82 to connect the liquid outlet hole 28 to the upper and lower cooling chambers. Then, the upper mold 1 is controlled to move upward, and the upper spring 13 and the lower spring 23 release their elastic force, pushing the upper mold 3 and the lower mold 4 away from their respective mold slots. The volume of the upper and lower cooling chambers increases, and the coolant enters the liquid inlet hole 26 through the liquid inlet connector 25. It is then diverted to the upper and lower cooling chambers through the T-shaped hole 72 of the first switching block 7, and fully contacts the mold and casting to achieve cooling. After absorbing heat, the coolant is discharged through the liquid outlet hole 28, the straight through hole 82 of the second switching block 8, and the liquid outlet connector 27, completing the cooling cycle.

[0046] After the casting in cavity 34 has completely cooled and solidified, the upper mold 1 is controlled to move down to its limit position, reducing the volume of the upper and lower cooling chambers to zero, and all the residual coolant in the chambers is discharged along the outlet connector 27. Then, the second hydraulic motor 81 is controlled to drive the second switching block 8 to rotate, disconnecting the upper and lower cooling chambers from the outlet connector 27. At the same time, the first hydraulic motor 71 is controlled to drive the first switching block 7 to rotate, disconnecting the upper and lower cooling chambers from the inlet connector 25, and reconnecting the air inlet 262 to the upper and lower cooling chambers. Then, the upper mold 1 is controlled to move up, and external gas enters the upper and lower cooling chambers along the air inlet 262. This prevents residual coolant from causing the molten metal to solidify prematurely during subsequent casting and die casting processes, which would affect the casting quality. This ensures the die casting and cooling effect, reduces casting defects, and improves product molding quality.

[0047] Example 6: The upper clearance rod 5 has an upper disassembly groove 52 near the upper mold 3 on its arc-shaped outer wall; the upper disassembly groove 52 is threadedly connected to the upper mold 3 with an upper bolt 53 facing downwards; the lower clearance rod 6 has a lower disassembly groove 62 near the lower mold 4 on its arc-shaped outer wall; the lower disassembly groove 62 is threadedly connected to the lower mold 4 with a lower bolt 63 facing upwards; the bottom of the upper clearance hole 12 is rotatably connected to the hole platform 16 through the hole groove 15; the cross-sectional shape of the hole groove 15 and the hole platform 16 is an inverted trapezoid; one end of the upper spring 13 is fixedly connected to the hole platform 16, and the other end is fixedly connected to the upper clearance rod 5.

[0048] During the cooling and mold opening / partitioning stages, the elastic force of the upper spring 13 can only push the upper mold 3 out of the upper mold groove 11 but cannot make it detach from the upper mold groove 11. The elastic force of the lower spring 23 can only push the lower mold 4 out of the lower mold groove 21 but cannot make it detach from the lower mold groove 21. One end of the upper spring 13 is fixedly connected to the hole platform 16 at the bottom of the upper clearance hole 12, and the other end is fixedly connected to the upper clearance rod 5. The hole platform 16 is rotatably connected to the bottom of the upper clearance hole 12 through the hole groove 15 with an inverted trapezoidal cross section. When the upper clearance rod 5 rotates, the upper spring 13 and the hole platform 16 rotate synchronously. The hole platform 16 is always stably connected to the bottom of the upper clearance hole 12, which achieves the effect of "hanging" the upper mold 3 without affecting the normal rotation of the upper clearance rod 5.

[0049] When it is necessary to replace the upper mold 3 or adjust the shape of the cavity 34, the operator manually pulls the upper mold 3 downwards. Since the lower end of the upper spiral groove 121 passes through the opening of the upper clearance hole 12, the upper groove block 51 can be moved out of the upper spiral groove 121. Pulling the upper mold 3 in this way can drive the upper clearance rod 5 to disengage from the upper clearance hole 12 from bottom to top. At the same time, the upper mold 3 also disengages from the upper mold groove 11. At this time, the upper disassembly groove 52 on the arc-shaped outer wall of the upper clearance rod 5 near the position of the upper mold 3 and the upper bolt 53 threadedly connected to the upper mold 3 in the groove are exposed. The operator can use a tool to tighten the upper bolt 53 to disconnect the upper clearance rod 5 from the upper mold 3. After replacing the upper mold 3 or adjusting the cavity 34, align the upper mold 3 and the upper clearance rod 5, tighten the upper bolt 53 to fix them, and then remove the upper clearance rod 5. Reinstall rod 5 into upper clearance hole 12 and reset upper mold 3 into upper mold groove 11. Similarly, when lower mold 4 needs to be replaced, the operator manually pulls lower mold 4 upward. Since the upper end of lower spiral groove 221 passes through the opening of lower clearance hole 22, lower groove block 61 can move out of lower spiral groove 221. Pulling lower mold 4 can drive lower clearance rod 6 to detach from lower clearance hole 22 from top to bottom. At the same time, lower mold 4 detaches from lower mold groove 21. The lower disassembly groove 62 of lower clearance rod 6 near the position of lower mold 4 and the lower bolt 63 threadedly connected to lower mold 4 in the groove are exposed. Tightening lower bolt 63 can disconnect lower clearance rod 6 from lower mold 4. After replacing lower mold 4, tighten lower bolt 63 to fix it, then reinstall lower clearance rod 6 into lower clearance hole 22 and reset lower mold 4 into lower mold groove 21.

[0050] Example 7: A one-way inlet valve 263 is provided near the inlet connector 25 at the inlet port 26; a one-way outlet valve 282 is provided near the outlet connector 27 at the outlet port 28.

[0051] Example 8: A chip removal gap 17 is left between the upper mold 1 and the lower mold 2 after die casting.

[0052] After casting is completed, the upper mold 1 is controlled to move down to enter the mold closing stage. The upper mold 3 moves down with the upper mold 1 and gradually contacts the lower mold 4 to form a sealed cavity 34. Since a chip removal gap 17 is preset between the upper mold 1 and the lower mold 2, during the mold closing process, the excess molten metal generated in the cavity 34 by extrusion can be smoothly discharged along the chip removal gap 17, avoiding the accumulation of excess molten metal at the edge of the cavity 34 and affecting the casting forming accuracy. At the same time, the chip removal gap 17 will not hinder the normal downward movement of the upper mold 1, ensuring that the upper mold 1 can stably and evenly transmit the pressure applied by the hydraulic cylinder to the upper mold 3, and then to the molten metal in the cavity 34, ensuring the pressure requirements of extrusion casting and ensuring that the molten metal can fully fill all gaps in the cavity 34, reducing casting defects. After the die casting is completed, the molten metal in the chip removal gap 17 can be cleaned periodically after cooling, without affecting the normal cycle operation of the mold.

[0053] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, a fixed connection refers to a fixed connection. In the description of the present invention, a sliding connection refers to a connection where the two parts can only slide and cannot be separated. Specifically, the groove can be set to be concave and the block can be set to be convex, and the specific design can be adjusted according to the actual situation. A sliding fit refers to a connection where the two parts can slide and separate. In the description of the present invention, a rotating connection refers to a connection where the two parts can only rotate and cannot produce axial displacement. Specifically, an annular groove can be provided on the inner wall of the hole, and a ring that is rotatably connected to the groove can be fixedly connected to the outer wall of the shaft.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping die for an automotive clutch housing, comprising an upper die and a lower die below the upper die; characterized in that: The upper mold has an annular upper mold groove at its center on its lower surface; the upper mold is movably and sealingly connected to the outer inner wall of the upper mold groove; the bottom of the upper mold groove and the lower surface of the upper mold both protrude downwards; the upper surface of the upper mold fits into the bottom of the upper mold groove; the bottom of the upper mold groove has an upper clearance hole; the bottom of the upper clearance hole is connected to the upper surface of the upper mold by an upper spring; the lower mold has a lower mold groove at its center on its upper surface corresponding to the upper mold groove; the lower mold groove is movably and sealingly connected to a corresponding lower mold; the bottom of the lower mold groove has a lower clearance hole; The bottom of the lower clearance hole is connected to the lower surface of the lower mold by a lower spring; after the upper and lower surfaces of the upper mold and the upper surface of the lower mold are closed, a cavity for extrusion casting is formed; the guide post fixedly connected to the upper surface of the lower mold is slidably sealed to the guide hole on the lower surface of the upper mold; a liquid inlet connector is provided on one side of the lower mold; the liquid inlet connector passes through the lower mold, the guide post, and the upper mold through the liquid inlet hole and connects to the upper mold groove and the lower mold groove; a liquid outlet connector is provided on the other side of the lower mold; the liquid outlet connector passes through the lower mold, the guide post, and the upper mold through the liquid outlet hole and connects to the upper mold groove and the lower mold groove.

2. The extrusion casting mold for an automotive clutch housing according to claim 1, characterized in that: An upper clearance rod is movably connected within the upper clearance hole; one end of the upper spring abuts against the bottom of the upper clearance hole, and the other end abuts against the upper end of the upper clearance rod; the lower end of the upper clearance rod is connected to the upper surface of the upper mold; the contact surface between the upper mold and the upper mold groove is a rotating surface; an upper spiral groove is provided on the inner wall of the upper clearance hole; an upper groove block fixedly connected to the upper clearance rod is movably connected within the upper spiral groove; a lower clearance rod is movably connected within the lower clearance hole; one end of the lower spring abuts against the bottom of the lower clearance hole, and the other end abuts against the lower end of the lower clearance rod; the upper end of the lower clearance rod is connected to the lower surface of the lower mold; the contact surface between the lower mold and the lower mold groove is a rotating surface; a lower spiral groove is provided on the inner wall of the lower clearance hole; a lower groove block fixedly connected to the lower clearance rod is movably connected within the lower spiral groove.

3. The extrusion casting mold for an automotive clutch housing according to claim 2, characterized in that: The upper and lower spiral grooves are symmetrically arranged; the upper and lower clearance rods rotate in the same direction.

4. The extrusion casting mold for an automotive clutch housing according to claim 2, characterized in that: The upper surface of the upper mold is provided with an upper spring groove; multiple upper spring grooves are evenly distributed on the upper surface of the upper mold; one end of the upper spring groove is fixedly connected to one end of the upper spring piece, and the other end of the upper spring piece can elastically extend out of the upper spring groove; the specifications of the upper spring piece are adapted to the shape of the upper spring groove.

5. The extrusion casting mold for an automotive clutch housing according to claim 2, characterized in that: The lower surface of the lower mold is provided with a lower spring groove; multiple lower spring grooves are evenly distributed on the lower surface of the lower mold; one end of the lower spring groove is fixedly connected to one end of the lower spring piece, and the other end of the lower spring piece can elastically extend out of the lower spring groove; the specifications of the lower spring piece are adapted to the shape of the lower spring groove.

6. The extrusion casting mold for an automotive clutch housing according to claim 3, characterized in that: The lower surface of the upper mold is provided with a hemispherical synchronization groove; a hemispherical synchronization block is fixedly connected to the upper surface of the lower mold; the specifications of the synchronization block are adapted to the specifications of the synchronization groove, and their positions correspond.

7. The extrusion casting mold for an automotive clutch housing according to claim 2, characterized in that: The liquid inlet is connected in series with a first switching groove; the first switching groove is located near the liquid inlet connector; a first switching block is rotatably and sealed within the first switching groove; a T-shaped hole is provided on the outer wall and inside of the first switching block; the first switching block is driven by a first hydraulic motor; the liquid outlet is connected in series with a second switching groove; the second switching groove is located near the liquid outlet connector; a second switching block is rotatably and sealed within the second switching groove; a through hole is provided on the outer wall and inside of the second switching block; the second switching block is driven by a second hydraulic motor; an air inlet is provided through the first switching groove to the outward; the air inlet is perpendicular to the liquid inlet around the first switching groove; the T-shaped hole on the first switching block can switch the on / off state of the air inlet and the liquid inlet.

8. The extrusion casting mold for an automotive clutch housing according to claim 2, characterized in that: The upper clearance bar has an upper disassembly groove on its arc-shaped outer wall near the upper mold; the upper disassembly groove is threadedly connected to the upper mold with an upper bolt facing downwards; the lower clearance bar has a lower disassembly groove on its arc-shaped outer wall near the lower mold; the lower disassembly groove is threadedly connected to the lower mold with a lower bolt facing upwards; the bottom of the upper clearance hole is rotatably connected to a hole platform through a hole groove; the cross-sectional shape of the hole groove and the hole platform is an inverted trapezoid; one end of the upper spring is fixedly connected to the hole platform, and the other end is fixedly connected to the upper clearance bar.

9. The extrusion casting mold for an automotive clutch housing according to claim 8, characterized in that: A one-way inlet valve is provided near the inlet connector of the liquid inlet hole; a one-way outlet valve is provided near the outlet connector of the liquid outlet hole.

10. The automobile clutch housing extrusion casting mold according to claim 1, characterized in that: A chip removal gap is left between the upper and lower molds after die casting.

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