Aluminum alloy wheel hub efficient demolding device and demolding method

Abstract

This invention discloses a high-efficiency demolding device and method for aluminum alloy wheel hubs, relating to the field of aluminum alloy wheel hub processing technology. The device includes a lower mold base, an upper mold, and multiple segmented molds. The segmented molds are arranged around the lower mold base, and the lower mold unit and the upper mold unit can achieve radial relative misalignment, forming a single unit when the mold is closed, and the upper mold unit separates first when the mold is opened. This structure effectively avoids uneven stress during wheel hub demolding, reduces deformation and damage, lowers demolding resistance, and improves demolding efficiency. The demolding method includes the following steps in sequence: first, the upper mold is controlled to move downward into position, and then the segmented molds are radially closed; molten aluminum alloy is injected and cooled to form; after forming, the upper mold unit is controlled to open first, and then the lower mold unit is controlled to open, allowing the wheel hub to be smoothly detached. This invention significantly improves production efficiency and product quality, reduces energy consumption and equipment wear, and has important practical significance and broad application prospects.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy wheel hub processing technology, and more specifically to an efficient demolding device and demolding method for aluminum alloy wheel hubs. Background Technology

[0002] Aluminum alloy wheels are widely used in the automotive manufacturing industry due to their advantages such as light weight, high strength, and attractive appearance. In the production process of aluminum alloy wheels, demolding is a crucial step, and its efficiency and quality directly affect production costs and product quality.

[0003] Traditional aluminum alloy wheel molds are mostly one-piece structures, and during demolding, an ejector mechanism is typically used to push the wheel hub out of the mold. However, this demolding method has several problems. On the one hand, due to the complex shape of aluminum alloy wheels, stress concentration can easily occur at the spokes and wheel edges during demolding, leading to wheel deformation or damage and affecting product quality. On the other hand, one-piece molds have high demolding resistance, requiring a large ejection force, which not only increases equipment energy consumption but may also damage the mold and shorten its service life. Furthermore, when the adhesion between the wheel hub and the mold is strong, the demolding process can become very difficult, even requiring manual assistance, which significantly reduces production efficiency and increases labor intensity.

[0004] To address these issues, researchers began exploring new mold structures and demolding methods. The segmented mold structure emerged, dividing the mold into multiple separable segments, each capable of independent movement and manipulation. During demolding, this structure allows for smooth detachment of the wheel hub from the mold by controlling the separation sequence and angle of each segment, effectively avoiding uneven stress on the hub during demolding and reducing the risk of deformation and damage. Simultaneously, the segmented mold exhibits relatively lower demolding resistance, resulting in a corresponding reduction in demolding force, thereby improving demolding efficiency and reducing energy consumption and equipment wear. Furthermore, the segmented mold is more convenient for maintenance and replacement; only damaged segments need to be replaced, rather than the entire mold, reducing maintenance costs and downtime.

[0005] Therefore, designing a reasonable and reliable aluminum alloy wheel hub mold demolding device is of great practical significance for improving the production efficiency of aluminum alloy wheels, reducing production costs, and improving product quality. Summary of the Invention

[0006] In view of this, the present invention provides an efficient demolding device and demolding method for aluminum alloy wheel hubs, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A high-efficiency demolding device for aluminum alloy wheel hubs includes a lower mold base and an upper mold, wherein the lower mold on the lower mold base and the upper mold are vertically corresponding; it also includes: multiple segmented molds; Multiple segmented molds are arranged around the lower mold base. When the multiple segmented molds are circumferentially closed, they can form a cavity for machining wheel hubs with the upper mold and the lower mold. The segmented mold includes a lower mold unit and an upper mold unit. The lower mold unit and the upper mold unit can be relatively misaligned in the radial direction. The lower mold unit is radially slidably connected to the lower mold base. When the mold is closed, the lower mold unit and the upper mold unit are combined to form an integral structure. In the opening mode, the upper mold unit performs the mold opening action before the lower mold unit.

[0009] Through the above technical solution, the present invention sets up multiple segmented molds, and the lower mold unit and the upper mold unit of the segmented mold can achieve relative misalignment in the radial direction, so that the upper mold unit performs the mold opening action before the lower mold unit when the mold is opened. This can effectively avoid uneven stress on the wheel hub during the demolding process, reduce the risk of wheel hub deformation and damage, reduce demolding resistance, improve demolding efficiency, and reduce energy consumption and equipment wear.

[0010] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, the upper mold unit and the lower mold unit are connected by a sliding limiting structure.

[0011] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, the sliding limiting structure includes a groove formed on the top surface of the lower mold unit and a slider fixed on the bottom surface of the upper mold unit, wherein the slider slides in cooperation with the groove.

[0012] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, the bottom surface of the slider is rotatably connected to a plurality of rollers that cooperate with the bottom surface of the groove.

[0013] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, there are two upper mold units, which are arranged side by side and connected to the lower mold unit through the sliding limiting structure.

[0014] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, the lower mold unit is driven and controlled by a lower hydraulic cylinder. The telescopic end of the lower hydraulic cylinder is fixedly connected to the connecting frame on the outer side wall of the lower mold unit. A support frame is fixed on the connecting frame, and an upper hydraulic cylinder is installed on the support frame. The telescopic end of the upper hydraulic cylinder is connected to the outer side wall of the upper mold unit.

[0015] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, the outer walls of both the lower mold unit and the upper mold unit have independent cooling water supply circulation interfaces.

[0016] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, the lower mold base is fixed with corner molds around the four corners of the lower mold, and the corner molds are circumferentially combined and closed with the segmented mold to form a mold closing and positioning for the segmented mold.

[0017] Preferably, in the above-mentioned high-efficiency demolding device for aluminum alloy wheel hubs, during mold closing, the upper mold first moves downward into position, and then the segmented mold is controlled to close radially.

[0018] This invention also provides a demolding method for an efficient demolding device for aluminum alloy wheel hubs, specifically including the following steps: Mold closing step: The segmented mold is circumferentially closed, so that the multiple segmented molds, the upper mold and the lower mold form a cavity for processing the wheel hub; when closing the mold, first control the upper mold to move downward into place, and then control the segmented mold to close radially, so that the lower mold unit and the upper mold unit of the segmented mold are combined to form an integral structure; Cooling step: Molten aluminum alloy is injected into the cavity and cooled to allow the aluminum alloy wheel hub to solidify and form within the cavity; Mold opening steps: After the wheel hub is formed, the upper mold unit is first controlled to open the mold. The upper mold unit is relatively misaligned with the lower mold unit and separates from the wheel hub. After the upper mold unit completes the mold opening action, the lower mold unit is controlled to open the mold, so that the wheel hub is detached from the lower mold unit.

[0019] Through the above technical solution, the present invention provides a demolding method for an efficient demolding device for aluminum alloy wheel hubs. By optimizing the mold closing, cooling and mold opening steps, it effectively improves demolding efficiency and product quality, reduces demolding resistance and energy consumption, and reduces the risk of deformation and damage to the wheel hub during the demolding process, which has significant economic and social benefits.

[0020] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a high-efficiency demolding device and demolding method for aluminum alloy wheel hubs, which has the following beneficial effects: 1. Improve demolding efficiency: The design of the segmented mold makes the demolding process smoother, reduces demolding resistance, lowers energy consumption, and improves production efficiency.

[0021] 2. Improve product quality: By optimizing the demolding sequence and mold structure, uneven stress on the wheel hub during demolding is effectively avoided, reducing the risk of wheel hub deformation and damage, and improving product quality.

[0022] 3. Enhanced mold reliability: The use of sliding limit structure and hydraulic cylinder improves the stability and service life of the mold, and reduces maintenance costs and downtime.

[0023] 4. High adaptability: The segmented mold can be flexibly designed according to the shape and size of the wheel hub, which improves the versatility and adaptability of the mold and can meet the production needs of different types of wheel hubs.

[0024] 5. Excellent cooling effect: The independent cooling water supply circulation interface enables rapid and uniform cooling, shortens the cooling time, and further improves production efficiency.

[0025] 6. Easy to operate: Clear mold closing and opening steps make the operation process simpler and easier to control, improving production reliability. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 The attached figure is an exploded structural diagram of the high-efficiency demolding device for aluminum alloy wheel hubs according to Embodiment 1 of the present invention; Figure 2 The attached figure is a schematic diagram of the combined structure of the high-efficiency demolding device for aluminum alloy wheel hubs according to Embodiment 1 of the present invention; Figure 3 The attached figure is a schematic diagram of the structure of the segmented mold of Embodiment 1 provided by the present invention; Figure 4 The attached figure is an exploded structural diagram of the segmented mold of Embodiment 1 provided by the present invention from a top view angle; Figure 5 The attached figure is an exploded structural diagram of the segmented mold of Embodiment 1 provided by the present invention from a bottom view angle; Figure 6 The attached figure is an exploded structural diagram of the high-efficiency demolding device for aluminum alloy wheel hubs according to Embodiment 2 of the present invention; Figure 7 The attached figure is a schematic diagram of the structure of the segmented mold of Embodiment 2 provided by the present invention; Figure 8 The attached figure is an exploded top view of the split mold of Embodiment 2 provided by the present invention. Figure 9 The attached figure is an exploded structural diagram of the segmented mold of Embodiment 2 provided by the present invention from a bottom view.

[0028] in: 1-Lower mold base; 2-Upper mold; 3-Lower mold; 4-Segmented mold; 41-Lower mold unit; 42-Upper mold unit; 43-Sliding limiting structure; 431-Groove; 432-Slider; 433-Roller; 44-Connecting frame; 45-Support frame; 46-Cooling water supply circulation interface; 5-Wheel hub; 6-Lower hydraulic cylinder; 7-Upper hydraulic cylinder; 8-angle mold. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] See appendix Figure 1 To be continued Figure 2 The present invention discloses an efficient demolding device for aluminum alloy wheel hubs, including a lower mold base 1 and an upper mold 2, wherein the lower mold 3 on the lower mold base 1 and the upper mold 2 are vertically corresponding; the invention is characterized by further including: a plurality of segmented molds 4; Multiple segmented molds 4 are arranged around the lower mold base 1. When the multiple segmented molds 4 are closed circumferentially, they can form a cavity with the upper mold 2 and the lower mold 3 for processing the wheel hub 5. The segmented mold 4 includes a lower mold unit 41 and an upper mold unit 42. The lower mold unit 41 and the upper mold unit 42 can achieve relative misalignment in the radial direction. The lower mold unit 41 is radially slidably connected to the lower mold base 1. When the mold is closed, the lower mold unit 41 and the upper mold unit 42 are combined to form an integral structure. In the opening mode, the upper mold unit 42 performs the mold opening action before the lower mold unit 41.

[0031] Example 1: See appendix Figure 3 To be continued Figure 5 The upper mold unit 42 and the lower mold unit 41 are connected by a sliding limiting structure 43. This ensures the stability and accuracy of their relative misalignment during movement, avoids positional deviations during mold opening or closing, and improves the reliability and service life of the mold.

[0032] To further optimize the above technical solution, the sliding limiting structure 43 includes a groove 431 formed on the top surface of the lower mold unit 41 and a slider 432 fixed on the bottom surface of the upper mold unit 42. The slider 432 is slidably engaged with the groove 431. The sliding limiting structure 43, including the groove 431 and the slider 432, is simple, reliable, and easy to manufacture. It effectively limits the relative movement direction of the upper mold unit 42 and the lower mold unit 41, further improving the accuracy and stability of the mold.

[0033] To further optimize the above technical solution, the bottom surface of the slider 432 is rotatably connected to multiple rollers 433 that mate with the bottom surface of the slide groove 431. This reduces the friction between the slider 432 and the slide groove 431, making the relative movement of the upper mold unit 42 and the lower mold unit 41 smoother, further reducing energy consumption and increasing the service life of the mold.

[0034] In this embodiment, the lower mold unit 41 is driven and controlled by the lower hydraulic cylinder 6. The telescopic end of the lower hydraulic cylinder 6 is fixedly connected to the connecting frame 44 on the outer side wall of the lower mold unit 41. A support frame 45 is fixed on the connecting frame 44, and an upper hydraulic cylinder 7 is mounted on the support frame 45. The telescopic end of the upper hydraulic cylinder 7 is connected to the outer side wall of the upper mold unit 42. The lower mold unit 41 is driven and controlled by the lower hydraulic cylinder 6, and the upper mold unit 42 is driven and controlled by the upper hydraulic cylinder 7. This enables precise control of the mold, improves the accuracy and reliability of the mold's movement, and the hydraulic drive provides a large driving force, which can meet the mold opening and closing requirements.

[0035] To further optimize the above technical solution, both the lower mold unit 41 and the upper mold unit 42 have independent cooling water supply circulation interfaces 46 on their outer side walls. This enables rapid cooling of the mold, shortens the cooling time of the aluminum alloy wheel hub, and improves production efficiency. At the same time, the independent cooling system can be adjusted according to the cooling needs of different parts to ensure the uniformity of the cooling effect.

[0036] To further optimize the above technical solution, corner molds 8 are fixed around the four corners of the lower mold 3 in the lower mold base 1. The corner molds 8 and the segmented mold 4 are circumferentially combined and closed to form a mold closing and positioning system for the segmented mold 4. This can improve the mold closing accuracy and stability, ensure the tightness of the mold during mold closing, avoid leakage of molten aluminum alloy, and improve product quality.

[0037] To further optimize the above technical solution, during mold closing, the upper mold 2 first moves downwards to its position, and then the segmented mold 4 is controlled to close radially. This mold closing sequence ensures the mold closing accuracy and stability, avoids mold damage or aluminum alloy molten liquid leakage caused by improper mold closing sequence, and improves the reliability of the production process.

[0038] The demolding method of the high-efficiency demolding device for aluminum alloy wheel hubs provided in this embodiment specifically includes the following steps: Mold closing steps: Close the segmented mold 4 circumferentially, so that multiple segmented molds 4, together with the upper mold 2 and the lower mold 3, form a cavity for processing the wheel hub 5; when closing the mold, first control the upper mold 2 to move downward into place, and then control the segmented mold 4 to close radially, so that the lower mold unit 41 and the upper mold unit 42 of the segmented mold 4 are combined to form an integral structure; Cooling step: Molten aluminum alloy is injected into the cavity and cooled to allow the aluminum alloy wheel hub to solidify and form within the cavity; Mold opening steps: After the wheel hub 5 is formed, the upper mold unit 42 is controlled to open the mold. The upper mold unit 42 is relatively misaligned with the lower mold unit 41 and separates from the wheel hub 5. After the upper mold unit 42 completes the mold opening action, the lower mold unit 41 is controlled to open the mold, so that the wheel hub 5 is detached from the lower mold unit 41.

[0039] This embodiment has a relatively simple structure and is suitable for the production of wheel hubs with relatively regular or symmetrical shapes. It can quickly realize mold opening and closing operations, thereby improving production efficiency.

[0040] Example 2: See appendix Figure 6 To be continued Figure 9 In this embodiment, there are two upper mold units 42, which are arranged side by side and connected to the lower mold unit 41 through a sliding limiting structure 43.

[0041] In this embodiment, during mold opening, the two upper mold units 42 are controlled to operate sequentially, and then the lower mold unit 41 is controlled to perform the mold opening operation.

[0042] The dual upper mold unit design in this embodiment can better adapt to the production of wheel hubs with complex or asymmetrical shapes. By controlling the opening action of the two upper mold units in stages, the risk of deformation and damage to the wheel hub during the demolding process is further reduced, thereby improving product quality and demolding efficiency.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency demolding device for aluminum alloy wheel hubs, comprising a lower mold base (1) and an upper mold (2), wherein the lower mold (3) on the lower mold base (1) and the upper mold (2) are vertically corresponding; characterized in that, It also includes: multiple segmented molds (4); Multiple segmented molds (4) are arranged around the lower mold base (1). When the multiple segmented molds (4) are circumferentially closed, they can form a cavity for processing the wheel hub (5) with the upper mold (2) and the lower mold (3). The split mold (4) includes a lower mold unit (41) and an upper mold unit (42). The lower mold unit (41) and the upper mold unit (42) can achieve relative misalignment in the radial direction. The lower mold unit (41) is radially slidably connected to the lower mold base (1). When the mold is closed, the lower mold unit (41) and the upper mold unit (42) are combined to form an integral structure. In the opening mode, the upper mold unit (42) performs the mold opening action before the lower mold unit (41).

2. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 1, characterized in that, The upper mold unit (42) and the lower mold unit (41) are connected by a sliding limiting structure (43).

3. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 2, characterized in that, The sliding limiting structure (43) includes a groove (431) formed on the top surface of the lower mold unit (41) and a slider (432) fixed on the bottom surface of the upper mold unit (42), wherein the slider (432) slides in cooperation with the groove (431).

4. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 3, characterized in that, The bottom surface of the slider (432) is rotatably connected to a plurality of rollers (433) that cooperate with the bottom surface of the slide groove (431).

5. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 2, characterized in that, The number of the upper mold units (42) is two, the two upper mold units (42) are arranged side by side, and are respectively connected to the lower mold unit (41) through the sliding limiting structure (43).

6. A high-efficiency demolding device for aluminum alloy wheel hubs according to any one of claims 1-5, characterized in that, The lower mold unit (41) is driven and controlled by the lower hydraulic cylinder (6). The telescopic end of the lower hydraulic cylinder (6) is fixedly connected to the connecting frame (44) on the outer side wall of the lower mold unit (41). A support frame (45) is fixed on the connecting frame (44). An upper hydraulic cylinder (7) is installed on the support frame (45). The telescopic end of the upper hydraulic cylinder (7) is connected to the outer side wall of the upper mold unit (42).

7. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 1, characterized in that, The outer walls of both the lower mold unit (41) and the upper mold unit (42) have independent cooling water supply circulation interfaces (46).

8. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 1, characterized in that, The lower mold base (1) has corner molds (8) fixed around the four corners of the lower mold (3). The corner molds (8) and the segmented mold (4) are circumferentially combined and closed to form a mold closing and positioning of the segmented mold (4).

9. The high-efficiency demolding device for aluminum alloy wheel hubs according to claim 1, characterized in that, When the mold is closed, the upper mold (2) first moves downward into position, and then controls the segmented mold (4) to close radially.

10. A demolding method for an efficient demolding device for aluminum alloy wheel hubs according to any one of claims 1-9, characterized in that, Specifically, the following steps are included: Mold closing steps: Close the segmented mold (4) circumferentially, so that the multiple segmented molds (4), the upper mold (2) and the lower mold (3) form a cavity for processing the wheel hub (5); when closing the mold, first control the upper mold (2) to move downward into place, and then control the segmented mold (4) to close radially, so that the lower mold unit (41) and the upper mold unit (42) of the segmented mold (4) are combined to form an integral structure; Cooling step: Molten aluminum alloy is injected into the cavity and cooled to allow the aluminum alloy wheel hub to solidify and form within the cavity; Mold opening steps: After the wheel hub (5) is formed, the upper mold unit (42) is first controlled to open the mold. The upper mold unit (42) and the lower mold unit (41) are relatively misaligned and separated from the wheel hub (5). After the upper mold unit (42) completes the mold opening action, the lower mold unit (41) is controlled to open the mold, so that the wheel hub (5) is detached from the lower mold unit (41).

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