An automobile wheel hub casting forming mold

Abstract

The application discloses a kind of automobile wheel hub casting forming mould, belong to automobile parts manufacturing technical field, the mould includes installation vertical board, installation top plate, second air cylinder, top mould, guide slide bar, transfer mechanism, stripping mechanism and stripping ejector rod, by setting stripping mechanism and in top mould rising to stripping ejector rod upper end contact installation top plate bottom after making second air cylinder continue to contract, so that stripping ejector rod is limited by installation top plate and extends downward and ejects wheel hub, while wheel hub bottom always adheres to the surface of transfer mechanism support table, fundamentally avoid the partial deformation, knock or surface scratch and other defects caused by free fall or larger impact drop to transfer platform after wheel hub stripping, significantly reduce casting flaw rate, effectively guarantee product appearance quality and dimensional accuracy.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts manufacturing technology, specifically, it relates to an automotive wheel hub casting mold. Background Technology

[0002] Casting is a process in which molten metal is poured into a mold cavity under the action of gravity or pressure, and then cooled and solidified to obtain a cast product. In a broad sense, it includes various methods such as gravity casting, low-pressure casting, and pressure casting (die casting). After casting is completed, the casting is often tightly fitted to the mold cavity, and a demolding mechanism is needed to remove the casting from the mold.

[0003] Low-pressure casting is a high-end casting technology that can produce high-quality metal castings. In the low-pressure casting process, the metal is melted into a liquid state, and then pre-pressurized to allow the molten metal to enter the mold and form the required shape. This process requires a certain amount of pressure to ensure that the casting shape is accurate and obtains the required physical properties.

[0004] Utility model CN223465553U discloses a low-pressure casting mold for aluminum alloy wheel hubs with a sand core. The mold includes a base, a mold-closing mechanism mounted on the base, an extrusion mechanism at the top of the mold-closing mechanism, and an installation mechanism fixed on the base. The installation mechanism includes a base plate and templates. The base plate is fixed at the top of the base, and several sets of templates are fixed in a ring at equal intervals on the base plate. A telescopic spring is installed inside the base plate, and a push rod is fixedly connected to the telescopic spring. A support seat is fixed on the base plate, and an insertion hole is provided inside the support seat. A sand core is engaged in the insertion hole. The sand core creates a hollow space inside the wheel hub during die casting, reducing material waste and improving the structural strength and durability of the wheel hub. After molding, the wheel hub moves upward with the extrusion mechanism, and the push pin, under the reaction force of the telescopic spring, abuts against the bottom end of the wheel hub, allowing it to slide out from the mold-closing mechanism.

[0005] In the casting process of wheel hubs, after the casting is formed, it needs to be separated from the upper mold to achieve demolding. Then, the wheel hub is placed on a transfer platform to proceed to the next process. However, the conventional demolding method currently relies on hydraulic cylinders or electric push cylinders as independent power sources to drive the ejection mechanism, forcibly pushing the wheel hub away from the mold. Since the wheel hub often falls to the transfer platform in a free fall or with a large impact during this process, and the casting has not been completely cooled at this time, the overall temperature is high and the material strength is low, it is very easy to cause defects such as local deformation, bumps or surface scratches during the fall or contact process. This leads to a decrease in the appearance quality and dimensional accuracy of the product, thereby significantly increasing the defect rate of the casting and affecting the finished product qualification rate and the consistency of subsequent processing. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] To address the problem mentioned in the background art that current conventional demolding methods rely on hydraulic cylinders or electric push cylinders as independent power sources to drive the ejection mechanism and forcibly eject the hub from the mold, the present invention adopts the following technical solution. Since the hub often falls onto the transfer platform in a free-fall or with a large impact during this process, and the casting has not yet fully cooled, its overall temperature is high and its material strength is low, it is highly susceptible to defects such as local deformation, impacts, or surface scratches during the fall or contact process. This leads to a decrease in product appearance quality and dimensional accuracy, significantly increasing the defect rate of the casting and affecting the finished product qualification rate and the consistency of subsequent processing.

[0008] A casting mold for automobile wheel hubs includes a mounting vertical plate, a mounting top plate fixedly connected to the outer wall of the mounting vertical plate, a second cylinder detachably connected to the upper center of the mounting top plate, the telescopic end of the second cylinder passing through the mounting top plate and detachably connected to a top mold, guide slide rods detachably connected to the four corners of the upper end of the top mold, the guide slide rods passing through the mounting top plate, a transfer mechanism provided on one side of the mounting vertical plate, a demolding mechanism installed at the upper end of the top mold, a plurality of demolding ejector rods installed on the demolding mechanism, the lower ends of the demolding ejector rods passing through the top mold, and the bottom end face of the demolding ejector rods being flush with the bottom surface of the cavity of the top mold, the top mold rising, and the demolding mechanism, after contacting the bottom of the mounting top plate, driving the demolding ejector rods downward to extend and eject the wheel hub.

[0009] Preferably, a protective mechanism is installed between the telescopic end of the second cylinder and the top mold. The protective mechanism causes the second cylinder to stop retracting after the pulling force of the second cylinder reaches a threshold.

[0010] Preferably, the demolding mechanism includes a limiting intermediate plate and a return spring. The bottom of the return spring is detachably connected to the upper end of the top mold, and the limiting intermediate plate is detachably connected to the upper end of the return spring. The upper end of each demolding ejector rod passes through the limiting intermediate plate and extends upward a certain distance. The telescopic end of the second cylinder passes through the limiting intermediate plate. During demolding, the top mold rises until the upper end of the demolding ejector rod contacts the bottom of the mounting plate. The control transfer mechanism moves to below the hub, driving the second cylinder to continue to retract, so that the demolding ejector rod extends downward through the restriction of the mounting plate, pushing the hub out.

[0011] Preferably, the protection mechanism includes a central column, a tension sensor, and a mounting boss. The bottom of the central column is detachably connected to the upper end of the top mold. The central column passes through the limiting intermediate plate. The tension sensor is detachably connected to the upper end of the central column. The mounting boss is detachably connected to the upper end of the tension sensor. The telescopic end of the second cylinder is detachably connected to the upper end of the mounting boss.

[0012] Preferably, the upper ends of the multiple ejector pins are fixedly connected to a pressure equalizing plate, and the telescopic end of the second cylinder passes through the pressure equalizing plate.

[0013] Preferably, the transfer mechanism includes a side frame, a drive shaft, an extension plate, a support platform, and a servo motor. The side frame includes two side frames arranged at an interval, which are respectively fixedly connected to one side of the mounting plate. The drive shaft is rotatably connected between the two side frames. The extension plate is connected to the outer wall of the drive shaft. The support platform is fixedly connected to the end of the extension plate. The servo motor is detachably connected to the upper end of the upper side frame. The drive end of the servo motor is detachably connected to the upper end of the drive shaft.

[0014] Preferably, a lifting mechanism is installed at the upper end of the lower side frame, which drives the support platform to rise and fall.

[0015] Preferably, the lifting mechanism includes an adjusting plate, a sliding ring groove, an arc-shaped slider, and a third cylinder. The adjusting plate is sleeved on the outer wall of the drive shaft. The outer wall of the drive shaft is provided with a sliding groove along the axial direction. An insert is fixedly connected to the inner wall of the adjusting plate. The insert is inserted into the interior of the sliding groove and slides in cooperation with the sliding groove. The adjusting plate rotates synchronously with the drive shaft and can slide relative to it along the axial direction of the drive shaft. A sliding ring groove is provided at the bottom of the adjusting plate. The arc-shaped slider is slidably connected to the interior of the sliding ring groove. The base part of the third cylinder is detachably connected to the upper end of the lower side frame. The telescopic end of the third cylinder is detachably connected to the bottom of the arc-shaped slider. The extension plate is fixedly connected to the outer wall of the adjusting plate.

[0016] Preferably, the upper end of each demolding ejector pin is connected to an adjusting rod via a threaded connection. The upper end of the adjusting rod is detachably connected to the bottom of the pressure equalizing platen. When the adjusting rod rotates relative to the demolding ejector pin, it can change the axial extension length of the demolding ejector pin. The outer wall of the demolding ejector pin is provided with a protrusion, which slides with the top mold. The outer wall of each adjusting rod is fixedly connected with a hexagonal head.

[0017] Preferably, a bottom mold is provided below the top mold, and multiple side molds are provided around the bottom mold. After the multiple side molds, the bottom mold, and the top mold are closed, a hub forming chamber is formed. Multiple mounting bases are detachably connected to the outer wall of the bottom mold. A first cylinder is detachably connected to the upper end of each mounting base. The telescopic end of the first cylinder is detachably connected to the outer wall of the side mold.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, by setting a demolding mechanism and causing the second cylinder to continue to retract after the top mold rises to the point where the upper end of the demolding ejector pin contacts the bottom of the mounting plate, the demolding ejector pin is restricted by the mounting plate and extends downward to push out the wheel hub. At the same time, the bottom of the wheel hub always keeps in contact with the surface of the transfer mechanism support platform. This fundamentally avoids defects such as local deformation, bumps, or surface scratches caused by the wheel hub falling to the transfer platform due to free fall or large impact after demolding. It significantly reduces the defect rate of castings and effectively ensures the appearance quality and dimensional accuracy of the product.

[0019] 2. In this invention, a protective mechanism is set between the telescopic end of the second cylinder and the top mold, and a tension sensor is set in the protective mechanism to detect the tension of the second cylinder in real time. When the tension exceeds the threshold, the control box controls the second cylinder to stop contracting, which can effectively prevent the demolding ejector rod from deforming or breaking due to excessive contraction force of the second cylinder, extend the service life of the demolding ejector rod, and improve the reliability and safety of equipment operation. By fixing a pressure equalizing plate to the upper end of multiple demolding ejector rods, the downward pressure applied by the second cylinder is evenly transmitted to each demolding ejector rod through the pressure equalizing plate during demolding. This avoids deformation caused by uneven force due to wear or length deviation of the upper end of a single demolding ejector rod, effectively ensuring the load balance when multiple demolding ejector rods work together, and improving the stability of the demolding process.

[0020] 3. In this invention, by connecting an adjusting rod to the upper end of each ejector pin via a threaded connection and fixing a hexagonal head to the outer wall of the adjusting rod, when the lower end of the ejector pin experiences varying degrees of wear due to long-term use, rotating the hexagonal head causes the adjusting rod to rotate relative to the ejector pin. This drives the ejector pin to move downwards under the guidance of the sliding fit between the protrusion and the top mold, ensuring that the lower end positions of each ejector pin remain consistent. Wear compensation can be achieved without replacing the entire batch of ejector pins, saving production costs, reducing downtime for adjustments, and improving production efficiency.

[0021] 4. In this invention, by setting an adjustment plate in the lifting mechanism and sleeved on the outer wall of the transmission shaft and slidingly engaging with the sliding groove through the insert block, the adjustment plate rotates synchronously with the transmission shaft and can slide relative to it along the axial direction of the transmission shaft. At the same time, a sliding ring groove is set at the bottom of the adjustment plate and slides in a sliding connection with an arc-shaped slider. The arc-shaped slider is driven by a third cylinder to drive the adjustment plate to rise and fall, so that the rotation and lifting actions of the support platform do not interfere with each other, realizing the coordinated control of the rotation positioning and lifting support of the wheel hub in a narrow space. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a casting mold structure for automobile wheel hubs according to the present invention; Figure 2 This is a front view schematic diagram of the automobile wheel hub casting mold in this invention; Figure 3This is a top view schematic diagram of the automobile wheel hub casting mold in this invention; Figure 4 This is a schematic diagram of the transfer mechanism structure in this invention; Figure 5 In this invention Figure 4 Enlarged structural diagram of section A; Figure 6 This is a schematic diagram of the demolding mechanism in this invention; Figure 7 This is a schematic diagram of the protective mechanism structure in this invention; Figure 8 This is a schematic diagram of the adjustment mechanism in this invention.

[0023] The correspondence between the labels and component names in the attached figures is as follows: 100. Install vertical plate; 101. Side mold; 102. Install base; 103. First cylinder; 104. Bottom mold; 105. Top mold; 106. Install top plate; 107. Guide slide rod; 108. Second cylinder; 200. Demolding mechanism; 201. Demolding ejector pin; 202. Limiting intermediate plate; 203. Return spring; 204. Central column; 205. Tension sensor; 206. Adjusting rod; 207. Pressure equalizing plate; 208. Hexagonal head; 300. Transfer mechanism; 301. Side frame; 302. Drive shaft; 303. Adjustment disc; 304. Sliding ring groove; 305. Extension plate; 306. Support platform; 307. Arc-shaped slider; 308. Third cylinder. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0027] like Figure 1 , Figure 2 as well as Figure 3 The diagram shows a preferred embodiment of an automotive wheel hub casting mold structure. The automotive wheel hub casting mold of this embodiment includes a mounting vertical plate 100. A mounting top plate 106 is fixedly connected to the outer wall of the mounting vertical plate 100. A second cylinder 108 is detachably connected to the upper center of the mounting top plate 106. The telescopic end of the second cylinder 108 passes through the mounting top plate 106 and is detachably connected to a top mold 105. Guide slide rods 107 are detachably connected to the four corners of the upper end of the top mold 105, passing through the mounting top plate 106. A bottom mold 104 is provided below the top mold 105. Multiple side molds 101 are provided around the bottom mold 104. After the multiple side molds 101, the bottom mold 104, and the top mold 105 are closed, a wheel hub forming chamber is formed. The outer wall of the bottom mold 104 is detachable. Multiple mounting bases 102 are connected, and a first cylinder 103 is detachably connected to the upper end of each mounting base 102. The telescopic end of the first cylinder 103 is detachably connected to the outer wall of the side mold 101. A transfer mechanism 300 is provided on one side of the mounting vertical plate 100. In this embodiment, when casting the wheel hub, the multiple side molds 101, the bottom mold 104, and the top mold 105 are closed to form a wheel hub forming chamber. The molten metal enters the interior of the wheel hub forming chamber through the pouring channel provided on the bottom mold 104. The molten metal is cooled by the wheel hub forming chamber to form a wheel hub. Then, the multiple side molds 101 are moved horizontally outward, causing the second cylinder 108 to contract and drive the top mold 105 to rise, thereby carrying the wheel hub upward. At the same time, the transfer mechanism 300 is controlled to move to the bottom of the wheel hub. After demolding, the wheel hub is transferred to the transfer mechanism 300.

[0028] After the wheel hub is formed, it will rise along with the top mold 105, thus requiring demolding. After demolding, the wheel hub will be transferred to the transfer mechanism 300. The impact of falling may cause the wheel hub to deform. To avoid this, the specific structure can adopt... Figure 6In the embodiment shown, a demolding mechanism 200 is installed on the upper end of the top mold 105. Multiple demolding ejector pins 201 are installed on the demolding mechanism 200. The lower ends of the demolding ejector pins 201 pass through the top mold 105, and the bottom end face of the demolding ejector pins 201 is flush with the bottom surface of the cavity of the top mold 105. When the top mold 105 rises, the demolding mechanism 200, after contacting the bottom of the mounting plate 106, drives the demolding ejector pins 201 to extend downwards, ejecting the hub. The demolding mechanism 200 includes a limiting intermediate plate 202 and a return spring 203. The bottom of the return spring 203 is detachably connected to the upper end of the top mold 105, and the limiting intermediate plate 202 is detachably connected to the upper end of the return spring 203. Each demolding ejector pin 201 has a lower end... The end of the ejector pin 201 passes through the limiting intermediate plate 202, and the upper end of the ejector pin 201 extends upward a certain distance. The telescopic end of the second cylinder 108 passes through the limiting intermediate plate 202. In this embodiment, during demolding, the top mold 105 is first raised until the upper end of the ejector pin 201 contacts the bottom of the mounting plate 106. Then, the transfer mechanism 300 is controlled to move to the bottom of the hub. At this time, the second cylinder 108 is driven to continue to retract, so that the ejector pin 201 extends downward through the restriction of the mounting plate 106, pushing the hub out. This ensures that the bottom of the hub always fits against the surface of the transfer mechanism 300 to prevent it from falling and deforming. After demolding, the ejector pin 201 is reset by the return spring 203 to prepare for the next demolding.

[0029] During demolding, the demolding ejector pin 201 contacts the bottom of the mounting plate 106. If the contraction force of the second cylinder 108 is too large, it can easily cause the demolding ejector pin 201 to deform or break, thus damaging the demolding ejector pin 201 and affecting the production of the wheel hub. To avoid this situation, the specific structure can be as follows: Figure 7 In the embodiment shown, a protective mechanism is installed between the telescopic end of the second cylinder 108 and the top mold 105. This protective mechanism stops the second cylinder 108 from retracting after the tension in the second cylinder 108 reaches a threshold. The protective mechanism includes a central column 204, a tension sensor 205, and a mounting boss. The bottom of the central column 204 is detachably connected to the upper end of the top mold 105. The central column 204 passes through the limiting intermediate plate 202. The tension sensor 205 is detachably connected to the upper end of the central column 204. The mounting boss is detachably connected to the upper end of the tension sensor 205, and the telescopic end of the second cylinder 108 is detachably connected to the upper end of the mounting boss. In this embodiment, the tension sensor 205 can detect the tension of the second cylinder 108 after the upper end of the demolding ejector 201 contacts the mounting top plate 106. When the tension exceeds the threshold, the tension sensor 205 sends a signal to the control box, and the control box controls the second cylinder 108 to stop retracting, thereby protecting the demolding ejector 201 and extending the service life of the demolding ejector 201.

[0030] Since the top mold 105 needs to rise to complete demolding after the ejector pin 201 contacts the bottom of the mounting plate 106, and the wear on the upper ends of each ejector pin 201 varies over time, if the upper ends of multiple ejector pins 201 deviate, the longer ejector pin 201 will bear more pressure during demolding, making it more prone to damage. To solve this problem, a specific structure can be adopted as follows: Figure 8 In the embodiment shown, the upper ends of multiple demolding ejector pins 201 are fixedly connected to a pressure equalizing platen 207. The telescopic end of the second cylinder 108 passes through the pressure equalizing platen 207. In this embodiment, by setting the pressure equalizing platen 207, the downward pressure can be evenly transmitted to each demolding ejector pin 201 during demolding, avoiding wear on the upper end of the demolding ejector pin 201, which would lead to uneven force and deformation.

[0031] Over time, wear will occur between the lower end of the ejector pin 201 and the formed hub. If uneven wear occurs, replacement is necessary, increasing production costs and reducing efficiency. To address uneven wear on the bottom of the ejector pin 201, a specific structure can be adopted as follows: Figure 8 In the illustrated embodiment, the upper end of each demolding ejector rod 201 is connected to an adjusting rod 206 via a threaded connection. The upper end of the adjusting rod 206 is detachably connected to the bottom of the pressure equalizing platen 207. When the adjusting rod 206 rotates relative to the demolding ejector rod 201, it can change the axial extension length of the demolding ejector rod 201. The outer wall of the demolding ejector rod 201 is provided with a protrusion, which slides with the top mold 105. The outer wall of each adjusting rod 206 is fixedly connected with a hexagonal head 208. In this embodiment, when the lower ends of multiple demolding ejector rods 201 are worn unevenly, the hexagonal head 208 is rotated to guide the demolding ejector rod 201 downward under the sliding fit between the protrusion on its outer wall and the top mold 105. This ensures that the lower ends of each demolding ejector rod 201 are in the same position, making the force on the hub more uniform during demolding and saving production costs.

[0032] The specific structure of the transfer mechanism 300 can be as follows: Figure 2In the embodiment shown, the transfer mechanism 300 includes a side frame 301, a drive shaft 302, an extension plate 305, a support platform 306, and a servo motor. The side frame 301 includes two side frames arranged vertically at intervals, each fixedly connected to one side of the mounting plate 100. The drive shaft 302 is rotatably connected between the two side frames 301. The extension plate 305 is connected to the outer wall of the drive shaft 302. The support platform 306 is fixedly connected to the end of the extension plate 305. The servo motor is detachably connected to the upper side frame 301. The upper end of the servo motor (not shown in the figure) is detachably connected to the upper end of the transmission shaft 302. A lifting mechanism is installed at the upper end of the lower side frame 301. The lifting mechanism drives the support platform 306 to rise and fall. In this embodiment, the servo motor drives the transmission shaft 302 to rotate, thereby causing the support platform 306 to rotate. During demolding, it moves to the bottom of the formed wheel hub. During demolding, the lifting mechanism can make the upper surface of the support platform 306 closely adhere to the bottom surface of the formed wheel hub, preventing the wheel hub from falling off during demolding.

[0033] The specific structure of the lifting mechanism can be as follows: Figure 4 as well as Figure 5 In the embodiment shown, the lifting mechanism includes an adjusting disc 303, a sliding annular groove 304, an arc-shaped slider 307, and a third cylinder 308. The adjusting disc 303 is sleeved on the outer wall of the drive shaft 302. The outer wall of the drive shaft 302 is provided with a sliding groove along the axial direction. An insert block is fixedly connected to the inner wall of the adjusting disc 303. The insert block is inserted into the sliding groove and slides in cooperation with the sliding groove. The adjusting disc 303 rotates synchronously with the drive shaft 302 and can slide relative to it along the axial direction of the drive shaft 302. The bottom of the adjusting disc 303 is provided with a sliding annular groove 304, and the arc-shaped slider 307... 7 is slidably connected to the inside of the sliding ring groove 304. The base part of the third cylinder 308 is detachably connected to the upper end of the lower side frame 301. The telescopic end of the third cylinder 308 is detachably connected to the bottom of the arc-shaped slider 307. The protruding plate 305 is fixedly connected to the outer wall of the adjusting plate 303. In this embodiment, the telescopic movement of the third cylinder 308 drives the adjusting plate 303 to move up and down along the transmission shaft 302. Through the setting of the adjusting plate 303, the sliding ring groove 304 and the arc-shaped slider 307, the lifting action and the rotation action do not interfere with each other.

[0034] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A casting mold for automobile wheel hubs, comprising a mounting vertical plate (100), a mounting top plate (106) fixedly connected to the outer wall of the mounting vertical plate (100), a second cylinder (108) detachably connected to the upper center of the mounting top plate (106), the telescopic end of the second cylinder (108) passing through the mounting top plate (106) and detachably connected to a top mold (105), guide slide rods (107) detachably connected to the four corners of the upper end of the top mold (105), the guide slide rods (107) passing through the mounting top plate (106), characterized in that, A transfer mechanism (300) is provided on one side of the mounting plate (100). A demolding mechanism (200) is installed on the upper end of the top mold (105). Multiple demolding ejector pins (201) are installed on the demolding mechanism (200). The lower end of the demolding ejector pin (201) passes through the top mold (105), and the bottom end face of the demolding ejector pin (201) is flush with the bottom surface of the cavity of the top mold (105). When the top mold (105) rises, the demolding mechanism (200) drives the demolding ejector pin (201) to extend downward after contacting the bottom of the mounting plate (106), thus ejecting the hub.

2. The automobile wheel hub casting mold according to claim 1, characterized in that, A protective mechanism is installed between the extension end of the second cylinder (108) and the top mold (105). The protective mechanism causes the second cylinder (108) to stop contracting after the tension of the second cylinder (108) reaches the threshold.

3. The automobile wheel hub casting mold according to claim 1, characterized in that, The demolding mechanism (200) includes a limiting intermediate plate (202) and a return spring (203). The bottom of the return spring (203) is detachably connected to the upper end of the top mold (105). The limiting intermediate plate (202) is detachably connected to the upper end of the return spring (203). The upper end of each demolding ejector (201) passes through the limiting intermediate plate (202) and the upper end of the demolding ejector (201) extends upward a certain distance. The telescopic end of the second cylinder (108) passes through the limiting intermediate plate (202). When demolding, the top mold (105) rises until the upper end of the demolding ejector (201) contacts the bottom of the mounting plate (106). The control transfer mechanism (300) moves to the bottom of the hub, driving the second cylinder (108) to continue to retract, so that the demolding ejector (201) extends downward through the restriction of the mounting plate (106) and pushes out the hub.

4. The automobile wheel hub casting mold according to claim 3, characterized in that, The protection mechanism includes a central column (204), a tension sensor (205), and a mounting boss. The bottom of the central column (204) is detachably connected to the upper end of the top mold (105). The central column (204) passes through the limiting intermediate plate (202). The tension sensor (205) is detachably connected to the upper end of the central column (204). The mounting boss is detachably connected to the upper end of the tension sensor (205). The telescopic end of the second cylinder (108) is detachably connected to the upper end of the mounting boss.

5. The automobile wheel hub casting mold according to claim 1, characterized in that, The upper ends of multiple ejector pins (201) are fixedly connected to pressure equalizing platen (207), and the telescopic end of the second cylinder (108) passes through pressure equalizing platen (207).

6. The automobile wheel hub casting mold according to claim 1, characterized in that, The transfer mechanism (300) includes a side frame (301), a drive shaft (302), an extension plate (305), a support platform (306), and a servo motor. The side frame (301) includes two side frames arranged at intervals, which are fixedly connected to one side of the mounting plate (100). The drive shaft (302) is rotatably connected between the two side frames (301). The extension plate (305) is connected to the outer wall of the drive shaft (302). The support platform (306) is fixedly connected to the end of the extension plate (305). The servo motor is detachably connected to the upper end of the upper side frame (301). The drive end of the servo motor is detachably connected to the upper end of the drive shaft (302).

7. The automobile wheel hub casting mold according to claim 6, characterized in that, A lifting mechanism is installed at the upper end of the lower side frame (301), which drives the support platform (306) to rise and fall.

8. The automobile wheel hub casting mold according to claim 7, characterized in that, The lifting mechanism includes an adjusting plate (303), a sliding ring groove (304), an arc-shaped slider (307), and a third cylinder (308). The adjusting plate (303) is sleeved on the outer wall of the transmission shaft (302). The outer wall of the transmission shaft (302) is provided with a sliding groove along the axial direction. An insert is fixedly connected to the inner wall of the adjusting plate (303). The insert is inserted into the interior of the sliding groove and slides in cooperation with the sliding groove. The adjusting plate (303) rotates synchronously with the transmission shaft (302) and can slide relative to the transmission shaft (302) along the axial direction. The bottom of the adjusting plate (303) is provided with a sliding ring groove (304). The arc-shaped slider (307) is slidably connected to the interior of the sliding ring groove (304). The base part of the third cylinder (308) is detachably connected to the upper end of the lower side frame (301). The telescopic end of the third cylinder (308) is detachably connected to the bottom of the arc-shaped slider (307). The extension plate (305) is fixedly connected to the outer wall of the adjusting plate (303).

9. The automobile wheel hub casting mold according to claim 1, characterized in that, Each ejector pin (201) has an adjusting rod (206) connected to its upper end via a threaded connection. The upper end of the adjusting rod (206) is detachably connected to the bottom of the pressure equalizing platen (207). When the adjusting rod (206) rotates relative to the ejector pin (201), it can change the axial extension length of the ejector pin (201). The outer wall of the ejector pin (201) is provided with a protrusion, which slides with the top mold (105). The outer wall of each adjusting rod (206) is fixedly connected with a hexagonal head (208).

10. The automobile wheel hub casting mold according to claim 1, characterized in that, A bottom mold (104) is provided below the top mold (105). Multiple side molds (101) are provided around the bottom mold (104). After the multiple side molds (101), the bottom mold (104) and the top mold (105) are closed, a hub forming chamber is formed. Multiple mounting bases (102) are detachably connected to the outer wall of the bottom mold (104). A first cylinder (103) is detachably connected to the upper end of each mounting base (102). The telescopic end of the first cylinder (103) is detachably connected to the outer wall of the side mold (101).

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