A star-shaped sleeve mold capable of rapid cooling

Abstract

The utility model relates to mechanical manufacturing technical field discloses a star -shaped cover mould of quick cooling, including lower mould body and upper mould body, upper mould body is located lower mould body top, and the lower mould body upper end is provided with lower mould cavity, and the lower mould cavity is installed with the push -out subassembly for stripping in, and the cooling assembly that installs in the lower mould body controls the temperature of lower mould body, and the positioning assembly is installed to upper mould body. The utility model discloses through the arc pipeline groove of multiple around cavity distribution, so that the heat exchange pipe can be closest to the lower mould cavity surface maximumly, realizes the even and efficient cooling of each petal, effectively avoids the partial overheating inside lower mould cavity, reduces the thermal stress inside mould, prolongs the service life of mould, reduces maintenance and replacement cost, and can continuously control the mould temperature in the specified range, and the detachable filter screen can effectively filter the impurity in cooling water, keeps the cooling liquid clean and heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, specifically to a star-shaped sleeve mold that can be rapidly cooled. Background Technology

[0002] The star-shaped bushing is the core component of the constant velocity universal joint. Its shape is star-shaped with precision grooves on the inner wall. Its core function in the automotive transmission system is to transmit power from the gearbox to the wheels at a constant speed, while compensating for wheel bounce and angular changes during steering. It is crucial for the vehicle's handling, smoothness, and reliability. Since star-shaped bushings are typically made of high-strength alloy steel, and warm forging is a plastic forming process performed near the metal recrystallization temperature, the star-shaped bushing stamping die is a specialized tool for realizing this process. During warm forging, the material heated to several hundred degrees Celsius continuously transfers a large amount of heat to the much cooler die. If this heat cannot be dissipated in a timely and effective manner, the die temperature will rise sharply and become uncontrollable. Therefore, the fundamental purpose of forced cooling of the die is not to directly cool the product itself, but to control the temperature of the die as a production tool, ensuring it remains stably within an ideal, relatively low operating window. This is a prerequisite for ensuring continuous, stable, and high-quality production.

[0003] Existing mold cooling systems are relatively simple, with cooling water channels typically consisting of simple straight holes or shallow loops. This poor matching with the complex cavity contours of star-shaped molds results in insufficient heat exchange area and inadequate heat transfer paths. The coolant flows far from the high-temperature areas requiring the most heat dissipation, leading to long heat conduction paths and significant temperature differences between different areas of the mold. This results in a slow temperature drop after each molding cycle, requiring operators to wait for extended cooling times before the next stamping, significantly prolonging the entire production cycle. Therefore, those skilled in the art provide a rapidly cooling star-shaped mold to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a star-shaped sleeve mold that can be cooled quickly, thereby solving the problems mentioned in the background section of the prior art.

[0005] This utility model provides the following technical solution: a star-shaped mold that can be cooled quickly, including a lower mold body and an upper mold body. The upper mold body is located above the lower mold body. A lower mold cavity is opened at the upper end of the lower mold body. An ejection component for demolding is installed in the lower mold cavity. A cooling component for controlling the temperature of the lower mold body is installed in the lower mold body. A positioning component is installed on the upper mold body.

[0006] As a preferred embodiment of the above technical solution, the cooling component includes multiple arc-shaped pipe channels. These multiple arc-shaped pipe channels are formed inside the lower mold body and are distributed around the lower mold cavity. Each of the multiple arc-shaped pipe channels is equipped with a heat exchange tube. The input ends of the multiple heat exchange tubes are connected to a liquid injection pipe, and the output ends of the multiple heat exchange tubes are connected to a liquid drain pipe. A refrigeration device is installed at the input end of the liquid injection pipe, and the liquid outlet end of the refrigeration device is connected to the input end of the liquid injection pipe.

[0007] As a preferred embodiment of the above technical solution, a processing box is fixedly connected to the upper end of the refrigeration device, the output end of the drain pipe is connected to the upper side of one side of the processing box, a delivery pipe is connected to the lower end of the processing box, the output end of the delivery pipe is connected to the return end of the refrigeration device, two through holes are opened on one side of the processing box, a filter screen is slidably connected in both through holes, multiple bolts pass through one side of each of the two filter screens, and the multiple bolts are threaded to one side of the processing box.

[0008] As a preferred embodiment of the above technical solution, the positioning component includes four positioning rods, which are respectively fixedly connected to the four corners of the lower end of the upper mold body. Positioning grooves are provided at the four corners of the upper end of the lower mold body, and the four positioning rods correspond one-to-one with the four positioning grooves.

[0009] As a preferred embodiment of the above technical solution, a connecting flange is fixedly connected to the upper end of the upper mold body, and a sealing gasket is installed on the side walls of the two filter screens, the sealing gasket being made of rubber.

[0010] As a preferred embodiment of the above technical solution, a drain pipe is connected to the lower side of the treatment box, and a manual valve is installed inside the drain pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This device utilizes multiple arc-shaped pipe channels distributed around the cavity to allow the heat exchange tubes to be as close as possible to the cavity surface, achieving uniform and efficient cooling of each segment of the lower mold body. This contour-following cooling ensures that the heat of the lower mold body is quickly and evenly removed, effectively preventing localized overheating inside the lower mold cavity, reducing thermal stress caused by temperature differences inside the mold, helping to prevent mold cracks, extending the mold's service life, reducing maintenance and replacement costs, and continuously controlling the mold temperature within a specified range. This prevents problems such as annealing, hardness reduction, and thermal fatigue of the mold steel due to prolonged exposure to high temperatures. At the same time, the removable filter screen effectively filters impurities in the cooling water, maintaining coolant cleanliness and heat exchange efficiency. Attached Figure Description

[0012] Figure 1This is a schematic diagram of a star-shaped sleeve mold that can be cooled quickly. Figure 2 A cross-sectional view of the arc-shaped pipe channel structure of a star-shaped sleeve mold that can be cooled quickly; Figure 3 A cross-sectional view of the lower mold body structure of a star-shaped sleeve mold that can be cooled quickly; Figure 4 This is a schematic diagram of the cooling component structure of a star-shaped sleeve mold that can be cooled quickly. Figure 5 A cross-sectional view of the processing box structure of a star-shaped sleeve mold that can be cooled quickly; Figure 6 This is a schematic diagram of the positioning component structure of a star-shaped sleeve mold that can be cooled quickly.

[0013] Legend: 1. Lower mold body; 2. Upper mold body; 3. Lower mold cavity; 4. Ejection assembly; 5. Cooling assembly; 501. Arc-shaped pipe groove; 502. Heat exchange pipe; 503. Injection pipe; 504. Drain pipe; 505. Refrigeration device; 506. Processing tank; 507. Infusion pipe; 508. Through port; 509. Filter screen; 510. Bolt; 6. Positioning assembly; 601. Positioning rod; 602. Positioning groove; 7. Connecting flange; 8. Drain pipe; 9. Manual valve. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] Please see Figures 1-6 The present invention provides a technical solution: a star-shaped mold that can be cooled quickly, including a lower mold body 1 and an upper mold body 2. The upper mold body 2 is located above the lower mold body 1. A lower mold cavity 3 is opened at the upper end of the lower mold body 1. An ejection component 4 for demolding is installed in the lower mold cavity 3. A cooling component 5 for controlling the temperature of the lower mold body 1 is installed in the lower mold body 1. A positioning component 6 is installed on the upper mold body 2.

[0016] Furthermore, a cavity is formed by the combination of the lower mold body 1 and the upper mold body 2. The lower mold cavity 3 directly determines the geometry of the star-shaped sleeve. The positioning component 6 ensures that the lower mold body 1 and the upper mold body 2 are precisely aligned during mold closing through physical guidance, thereby ensuring the product dimensional accuracy and avoiding mold damage. The cooling component 5 integrated inside the lower mold body 1 directly and efficiently removes heat from inside the lower mold body 1 through active circulation of cooling medium, strictly controlling the working temperature of the lower mold body 1, avoiding product defects caused by overheating, and effectively avoiding local overheating inside the lower mold cavity 3. This reduces the thermal stress caused by temperature difference inside the mold, helps prevent mold cracks, and extends the service life of the mold. After mold opening, the ejection component 4 installed in the lower mold cavity 3 performs the ejection action, automatically removing the shaped workpiece from the mold cavity, thereby completing an efficient and automatic production cycle.

[0017] It is worth noting that component 4 is an existing technology, consisting of core components such as ejector pins, ejector pin fixing plates, ejector pin push plates, and return rods. After mold opening, the ejection mechanism pushes the ejector pin push plate forward, which in turn drives the ejector pin fixed on it to pass through the bottom of the lower mold cavity 3 along a specific trajectory, smoothly ejecting the cooled and formed star-shaped sleeve workpiece from the cavity and completing the demolding action. Then, before mold closing, it is precisely reset by structures such as the return rod to prepare for the next production cycle, which will not be elaborated here.

[0018] As one implementation method in this embodiment, please refer to Figures 1-5 As shown, the cooling component 5 includes an arc-shaped pipe groove 501, and multiple arc-shaped pipe grooves 501 are provided. The multiple arc-shaped pipe grooves 501 are opened inside the lower mold body 1 and distributed around the lower mold cavity 3. Each of the multiple arc-shaped pipe grooves 501 is provided with a heat exchange pipe 502. The input end of the multiple heat exchange pipes 502 is connected to a liquid injection pipe 503. The output end of the multiple heat exchange pipes 502 is connected to a liquid drain pipe 504. A refrigeration device 505 is installed at the input end of the liquid injection pipe 503. The liquid outlet end of the refrigeration device 505 is connected to the input end of the liquid injection pipe 503. The upper end of the refrigeration device 505 is fixedly connected to the processing box 506. The output end of the drain pipe 504 is connected to the upper side of the processing box 506. The lower end of the processing box 506 is connected to the infusion pipe 507. The output end of the infusion pipe 507 is connected to the return end of the refrigeration device 505. Two through holes 508 are opened on one side of the processing box 506. A filter screen 509 is slidably connected in both through holes 508. Multiple bolts 510 pass through one side of each filter screen 509. The multiple bolts 510 are threadedly connected to one side of the processing box 506.

[0019] Furthermore, the low-temperature coolant generated by the refrigeration device 505 is evenly distributed via the injection pipe 503 into multiple arc-shaped pipe grooves 501 embedded inside the lower mold body 1 and surrounding the lower mold cavity 3, allowing the heat exchange pipes 502 to be as close as possible to the surface of the lower mold cavity 3. This achieves uniform and efficient cooling of each segment of the lower mold cavity 3 of the lower mold body 1. This contour-following cooling ensures that the heat of the lower mold body 1 can be quickly and evenly removed, effectively avoiding local overheating inside the lower mold cavity 3, reducing thermal stress caused by temperature differences inside the mold, and helping to prevent cracks in the mold. It extends the service life of the mold, reduces maintenance and replacement costs, and can continuously control the temperature of the lower mold body 1 within a specified range, preventing annealing, hardness reduction, and thermal fatigue of the steel of the lower mold body 1 due to long-term exposure to high temperatures. In addition, two detachable filters 509 are responsible for filtering out impurities generated in the circulation to keep the coolant clean and the system unobstructed. The coolant after filtration and sedimentation is finally returned to the refrigeration device 505 through the infusion pipe 507 for further cooling, thus forming a complete and efficient temperature control cycle that can continuously ensure that the lower mold body 1 is in a specified low-temperature working state.

[0020] It should be noted that the refrigeration unit 505 is existing technology, mainly composed of a compressor, condenser, expansion valve, liquid pump and evaporator. During operation, the compressor compresses the low-temperature, low-pressure refrigerant vapor into a high-temperature, high-pressure state. Subsequently, the vapor releases heat to the outside and liquefies into a high-pressure liquid in the condenser. This liquid is then throttled and depressurized by the expansion valve, and then violently absorbs heat and vaporizes in the evaporator, thereby continuously cooling the coolant flowing outside the evaporator. Finally, the low-temperature coolant is pumped into the injection pipe 503 through its liquid outlet by the liquid pump, so as to realize the core function of providing a stable cold source for the entire cooling assembly 5. This will not be elaborated here.

[0021] As one implementation method in this embodiment, please refer to Figure 6 As shown, the positioning component 6 includes four positioning rods 601, which are fixedly connected to the four corners of the lower end of the upper mold body 2. The four corners of the upper end of the lower mold body 1 are provided with positioning grooves 602, and the four positioning rods 601 correspond one-to-one with the four positioning grooves 602.

[0022] Furthermore, during the mold closing process, the four positioning rods 601 fixed to the lower end of the upper mold body 2 are inserted into the corresponding positioning grooves 602 on the lower mold body 1 as the upper mold body 2 moves downward. Before the upper mold body 2 and the lower mold body 1 are completely closed, the rods guide and correct the mold, thereby achieving the alignment of the upper mold body 2 and the lower mold body 1. This effectively prevents quality defects such as flash and uneven product wall thickness caused by mold closing misalignment, and avoids damage to the mold cavity and internal components caused by misalignment and extrusion. This greatly improves the stability and reliability of the mold closing action.

[0023] As one implementation method in this embodiment, please refer to Figure 1 and Figure 6 As shown, the upper mold body 2 is fixedly connected to the connecting flange 7, and the two filter screens 509 are equipped with sealing gaskets on their side walls. The sealing gaskets are made of rubber.

[0024] Furthermore, the connecting flange 7, as a standardized mechanical interface, is firmly mechanically connected to the press slider above through its own mounting hole, thereby accurately and stably transmitting the power of the equipment to the upper mold body 2 to drive the upper mold body 2 to complete precise mold closing and opening actions. This provides a basic guarantee for the stable operation and high-precision molding of the entire mold. At the same time, the sealing gasket layer installed on the side wall of the filter screen 509 is tightly pressed against the inner wall of the through-hole 508 through its elastic deformation, effectively preventing unfiltered liquid from bypassing and leaking. This can maintain the filtration efficiency of the filter screen 509 and the cleanliness of the coolant for a long time, thereby ensuring the smooth operation and stable heat exchange efficiency of the entire cooling circuit.

[0025] As one implementation method in this embodiment, please refer to Figure 2 , Figure 4 and Figure 5 As shown, a drain pipe 8 is connected to the lower side of the treatment box 506, and a manual valve 9 is installed inside the drain pipe 8.

[0026] Furthermore, by manually opening the manual valve 9, the impurities deposited at the bottom of the treatment box 506 are completely discharged from the treatment box 506 through the drain pipe 8, making it convenient for the user to clean the treatment box 509.

[0027] Working principle: During the operation of the upper mold body 2 and the lower mold body 1, the refrigeration device 505 pumps low-temperature coolant into the injection pipe 503. The low-temperature coolant is evenly distributed to six heat exchange pipes 502 through the injection pipe 503. These six heat exchange pipes 502 are respectively embedded in multiple arc-shaped pipe grooves 501 surrounding the lower mold cavity 3. This surrounding layout allows the coolant to absorb heat evenly and directly from the lower mold body 1 from all sides of the star-shaped mold. As the coolant flows through the heat exchange pipes 502, it undergoes efficient heat exchange with the high-temperature lower mold body 1, carrying away the heat accumulated inside the lower mold body 1, thereby forcibly lowering and stabilizing the temperature of the lower mold body 1 at the specified temperature, completing the heat exchange. Afterwards, the heated coolant flows from each heat exchanger tube 502 into the drain pipe 504, and is then sent to the processing tank 506. After entering the processing tank 506, the high-temperature coolant first flows through two layers of filter screens 509 to filter out impurities and foreign objects that may be carried during the circulation process, ensuring the cleanliness of the coolant and preventing blockage. After the filtered coolant settles, it flows back to the refrigeration device 505 through the delivery pipe 507. The refrigeration device 505 cools the returned coolant to bring it back to the set low temperature, ready to start the next cooling cycle. This effectively avoids local overheating inside the lower mold cavity 3, reduces the thermal stress caused by temperature differences inside, helps prevent mold cracks, and extends the service life of the mold.

[0028] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A star-shaped sleeve mold capable of rapid cooling, comprising a lower mold body (1) and an upper mold body (2), characterized in that: The upper mold body (2) is located above the lower mold body (1). The lower mold body (1) has a lower mold cavity (3) at its upper end. An ejection component (4) for demolding is installed in the lower mold cavity (3). A cooling component (5) for controlling the temperature of the lower mold body (1) is installed in the lower mold body (1). A positioning component (6) is installed on the upper mold body (2).

2. The star-shaped sleeve mold with rapid cooling according to claim 1, characterized in that: The cooling component (5) includes an arc-shaped pipe groove (501), and multiple arc-shaped pipe grooves (501) are provided. The multiple arc-shaped pipe grooves (501) are opened inside the lower mold body (1) and distributed around the lower mold cavity (3). Each of the multiple arc-shaped pipe grooves (501) is provided with a heat exchange tube (502). The input end of the multiple heat exchange tubes (502) is connected to a liquid injection pipe (503), and the output end of the multiple heat exchange tubes (502) is connected to a drain pipe (504). A refrigeration device (505) is installed at the input end of the liquid injection pipe (503), and the liquid outlet end of the refrigeration device (505) is connected to the input end of the liquid injection pipe (503).

3. The star-shaped sleeve mold with rapid cooling according to claim 2, characterized in that: The upper end of the refrigeration device (505) is fixedly connected to a processing box (506). The output end of the drain pipe (504) is connected to the upper side of the processing box (506). The lower end of the processing box (506) is connected to a delivery pipe (507). The output end of the delivery pipe (507) is connected to the return end of the refrigeration device (505). Two through holes (508) are opened on one side of the processing box (506). A filter screen (509) is slidably connected in both through holes (508). Multiple bolts (510) are threaded through one side of each of the two filter screens (509). The multiple bolts (510) are threaded to one side of the processing box (506).

4. The star-shaped sleeve mold with rapid cooling according to claim 1, characterized in that: The positioning component (6) includes four positioning rods (601), which are fixedly connected to the four corners of the lower end of the upper mold body (2). The four corners of the upper end of the lower mold body (1) are provided with positioning grooves (602), and the four positioning rods (601) correspond one-to-one with the four positioning grooves (602).

5. A rapidly cooling star-shaped sleeve mold according to claim 3, characterized in that: The upper mold body (2) is fixedly connected to a connecting flange (7), and the two filter screens (509) are fitted with sealing gaskets on their side walls. The sealing gaskets are made of rubber.

6. A rapidly cooling star-shaped sleeve mold according to claim 3, characterized in that: A drain pipe (8) is connected to one side of the lower part of the treatment box (506), and a manual valve (9) is installed in the drain pipe (8).

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