A differentiated edge module structure

Abstract

This utility model relates to the field of aluminum alloy wheel hub casting technology and discloses a differentiated side mold structure, which includes a side mold body formed by a first module, a second module, a third module, and a fourth module. The first module covers a 110-130° circumferential arc area of ​​the wheel hub, the third module covers a 90-110° circumferential arc area of ​​the wheel hub, and the second and fourth modules each cover a 50-70° circumferential arc area of ​​the wheel hub. This utility model breaks away from the conventional uniform distribution method of side molds and rationally allocates the size of the four modules according to the special shape of the wheel hub, so that each weight-reducing block is completely placed on the module and avoids being located at the module joint. This fundamentally solves the problem of molten metal leakage and burrs caused by the weight-reducing block being located at the joint, reducing the product scrap rate and minimizing resource waste and economic losses.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy wheel hub casting technology, and in particular to a differentiated edge mold structure. Background Technology

[0002] Currently, low-pressure casting remains the mainstream production method for aluminum alloy wheels. With increasingly fierce market competition, customers are demanding more complex wheel designs and, at the same time, pursuing lightweight wheels to the extreme. In actual production, by evenly distributing weight-reducing blocks circumferentially on the side molds of the wheel casting mold, weight-reducing recesses are formed on the wheel blank after casting, achieving the goal of reducing wheel weight.

[0003] However, when dealing with products featuring five weight-reducing depressions, the conventional mold design, with four side molds evenly distributed at 90° angles, is no longer sufficient to meet production demands. Due to structural limitations, the side mold seams cannot completely avoid the five weight-reducing blocks, resulting in at least one weight-reducing block appearing at the seam between two side molds. This structural defect easily leads to the following problems: molten metal leakage at the seam forms burrs. In mild cases, manual polishing is required, increasing production costs and extending the production cycle; in severe cases, it can lead to direct product scrapping, causing significant resource waste and economic losses.

[0004] Therefore, there is an urgent need for innovative design of mold structure to effectively solve the production problems of such complex-shaped wheel hub products. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned problems by providing a differentiated edge mold structure. The technical solution adopted by this utility model is as follows:

[0006] A differentiated edge mold structure includes an edge mold body, which is formed by a first module, a second module, a third module and a fourth module. The first module covers a 110-130° circumferential arc area of ​​the wheel hub, the third module covers a 90-110° circumferential arc area of ​​the wheel hub, and the second module and the fourth module respectively cover a 50-70° circumferential arc area of ​​the wheel hub.

[0007] Preferably, counterweights are fixedly connected to the second module and the fourth module respectively to adjust the left and right center of gravity of the second module and the fourth module to be symmetrical.

[0008] Preferably, the counterweight maintains a gap of 1-3mm with the first module and the third module respectively.

[0009] Preferably, the lower end of the cross key and the corresponding groove of the base plate are fitted with a clearance of 0.15-0.3mm on one side.

[0010] Preferably, positioning locking posts are respectively provided on the base plate at the joint positions of the first module, the second module, the third module and the fourth module, and positioning pins are respectively provided on the side of the first module, the second module, the third module and the fourth module along the length direction. The positioning locking posts are provided with guide grooves corresponding to the positioning pins, and the positioning pins slide with the guide grooves.

[0011] Preferably, positioning locking posts are respectively provided on the base plate at the joint positions of the first module, the second module, the third module and the fourth module, and positioning pins are respectively provided on the side of the first module, the second module, the third module and the fourth module along the length direction. The positioning locking posts are provided with guide grooves corresponding to the positioning pins, and the positioning pins slide with the guide grooves.

[0012] Preferably, a locking hole is provided at the front end of the corresponding positioning pin in the guide groove for locking the position of the four modules. The locking hole is inserted into the front end of the positioning pin, and the positioning pin is elastically telescopically connected to the side mold body.

[0013] Preferably, a positioning pin is provided at the top of the positioning locking post, and a through groove is provided on the top template corresponding to the positioning pin. The positioning pin is inserted into the through groove to improve the positioning accuracy of the top template.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention breaks away from the conventional method of evenly distributing side molds. Based on the unique shape of the wheel hub, the four modules are rationally allocated in size, ensuring that each weight-reducing block is fully placed on the module, avoiding its location at the module joints. This fundamentally solves the problem of molten metal leakage and burrs caused by weight-reducing blocks located at joints, reducing product scrap rates and minimizing resource waste and economic losses. Through a unique parting angle design, it avoids excessive differences in side mold dimensions and uneven distribution due to a single parting angle, ensuring the rationality and stability of the mold structure and facilitating long-term use and maintenance. Counterweights are set in the first and fourth modules to adjust the left and right center of gravity symmetry, preventing the narrow width from causing uneven distribution. The asymmetrical second and fourth modules tilt during mold opening and closing. Simultaneously, the counterweight maintains a suitable gap with the relevant modules to prevent thermal interference and ensure stable side mold operation. The bottoms of the four modules are connected to the base plate via cross keys and sliding grooves, ensuring smooth and stable mold opening and closing, thus improving the reliability of mold operation. Positioning locking pins are installed on the base plate, working in conjunction with positioning pins, guide grooves, and locking holes on the modules to achieve precise guidance, positioning, and locking, effectively improving mold closing accuracy. The positioning pins at the top of the positioning locking pins cooperate with the through grooves of the top mold plate, further improving the positioning accuracy of the top mold and preventing misalignment between the top and bottom molds, which could lead to incomplete mold closing. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 for Figure 1 Exploded view.

[0019] Figure 3 for Figure 1 Top view after hiding the top template and bottom plate.

[0020] In the diagram: 10--Side mold body; 11--First module; 12--Second module; 13--Third module; 14--Fourth module; 15--Weight reduction block; 16--Counterweight block; 17--Cross key; 18--Positioning pin; 20--Base plate; 21--Slide groove; 30--Positioning locking pin; 31--Guide groove; 32--Locking hole; 33--Positioning pin; 40--Top template; 41--Through groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figure 1-3 As shown, a differentiated edge mold structure includes an edge mold body 10, which is formed by a first module 11, a second module 12, a third module 13, and a fourth module 14 (hereinafter referred to as "four modules"). The first module 11 covers a 110-130° circumferential arc area of ​​the wheel hub, the third module 13 covers a 90-110° circumferential arc area of ​​the wheel hub, and the second module 12 and the fourth module 14 each cover a 50-70° circumferential arc area of ​​the wheel hub. This design allows the first module 11 to accommodate two complete weight-reducing blocks 15, while the second, third, and fourth modules 14 each accommodate one complete weight-reducing block 15, thus avoiding the uniformly distributed circumferential weight-reducing blocks 15 being located at the seams between two modules.

[0023] As a preferred embodiment, such as Figure 3 As shown, taking the third module 13, where the weight-reducing block 15 is located at the center of the module, as a reference, its mating surfaces with the second module 12 and the fourth module 14 are parted at 45°; the other two 45° mating surfaces of the second module 12 and the fourth module 14 are parted at 25°-35°; and the 45° mating surface of the first module 11 is parted at 55°-65°. This parting angle design can effectively avoid the situation where the side mold dimensions are too different or unevenly distributed due to parting at a single angle, thereby ensuring the rationality and stability of the mold structure.

[0024] This invention breaks away from the conventional method of evenly distributing side molds in molds, allowing for a reasonable allocation of the size of the four modules according to the specific shape of the wheel hub product. This ensures that each weight-reducing block 15 can be completely placed on the module, avoiding the weight-reducing block 15 being located at the module joint, thus fundamentally solving the problem of easily generated burrs.

[0025] Preferably, in order to improve the stability of the side mold opening and closing action and avoid the tilting phenomenon of the second module 12 and the fourth module 14 with smaller width and asymmetry during the opening and closing process, a counterweight block 16 is added to the second module 12 and the fourth module 14. The counterweight block 16 is fixedly connected to the side of the second module 12 and the fourth module 14 respectively, so as to adjust the left and right center of gravity of the second module 12 and the fourth module 14 to be symmetrical.

[0026] Preferably, the counterweight 16 maintains a gap of 1-3mm with the first module 11 and the third module 13 respectively, which can prevent interference during hot molding and ensure the stability of the side mold operation.

[0027] Preferably, such as Figure 1-2 As shown, the bottoms of the four modules are slidably connected to the base plate 20. Each of the four modules has a stepped groove at its bottom, and a cross key 17 is installed in the stepped groove. A corresponding sliding groove 21 is formed on the base plate 20, and the cross key 17 is slidably connected to the sliding groove 21. The lower end of the cross key 17 and the corresponding sliding groove 21 on the base plate 20 are fitted with a clearance of 0.15-0.3mm on one side to ensure smooth and stable mold opening and closing.

[0028] Preferably, positioning locking pins 30 are respectively provided on the base plate 20 at the joint positions of the four modules for guiding and positioning the four modules, thereby improving the mold closing accuracy. Specifically, positioning pins 18 are respectively provided on the side of the four modules along their length direction, and guide grooves 31 are opened on the positioning locking pins 30 corresponding to the positioning pins 18. The positioning pins 18 slide with the guide grooves 31 to play a role in precise guidance and positioning.

[0029] Preferably, a locking hole 32 is provided in the guide groove 31 corresponding to the front end of the positioning pin 18 for locking the positions of the four modules. Specifically, the locking hole 32 is inserted into the front end of the positioning pin 18, and the positioning pin 18 is elastically telescopically connected to the side mold body 10. When the mold is closed, the four modules slide and converge towards the center through the guiding action of the positioning pin 18 and the guide groove 31. At this time, the front end of the positioning pin 18 is under pressure and in a retracted state. After the mold is closed, the front end of the positioning pin 18 just moves to the locking hole 32 and elastically presses against the locking hole 32, making the side mold close more tightly and securely.

[0030] Given that the four modules are of different sizes and are relatively high, in order to prevent the top mold and bottom mold from being misaligned and causing the side molds to not close properly, a positioning pin 33 is set at the top of the positioning locking post 30. A through groove 41 is opened on the top mold plate 40 corresponding to the positioning pin 33. The positioning pin 33 and the through groove 41 are inserted and matched to improve the positioning accuracy of the top mold.

[0031] During mold opening, the side mold cylinders drive each module to move outward, and the cross keys 17 at the bottom of the four modules slide along the corresponding slide grooves 21 on the base plate 20. At the same time, the positioning pins 18 on the sides of the four modules disengage from the locking holes 32 in the guide grooves 31 and slide along the guide grooves 31 until the side mold is pulled to the designated position. Subsequently, the die-casting machine pulls the top platen 40 upward, and the through groove 41 on the top platen 40 separates from the positioning pin 33 at the top of the positioning locking post 30 until the top platen 40 is pulled to the designated position, completing the mold opening operation. When the mold is closed, the die-casting machine lowers the top platen 40 so that the through groove 41 on the top platen 40 is inserted into the positioning pin 33 at the top of the positioning locking post 30, thus completing the mold closing of the top mold and the bottom mold. Then, the side mold cylinder pushes the four modules to move towards the center, and the cross key 17 at the bottom of the four modules slides along the corresponding slide groove 21 on the bottom plate 20. At the same time, the positioning pins 18 on the sides of the four modules slide along the guide groove 31 on the positioning locking post 30 until the front end of the positioning pin 18 is inserted into the locking hole 32. At this time, the side mold is just closed, and the entire mold closing operation is completed.

[0032] The above-disclosed embodiments are merely specific examples of this utility model, but this utility model is not limited thereto. For those skilled in the art, any modifications made without departing from the principle of this utility model should be considered as protected by this utility model.

Claims

1. A differentiated edge mold structure, characterized in that: Includes a side mold body (10), which is formed by a first module (11), a second module (12), a third module (13) and a fourth module (14). The first module (11) covers a 110-130° circumferential arc area of ​​the hub, the third module (13) covers a 90-110° circumferential arc area of ​​the hub, and the second module (12) and the fourth module (14) respectively cover a 50-70° circumferential arc area of ​​the hub.

2. The differentiated edge mold structure according to claim 1, characterized in that: The second module (12) and the fourth module (14) are respectively fixedly connected with counterweights (16) to adjust the left and right center of gravity of the second module (12) and the fourth module (14) to be symmetrical.

3. The differentiated edge mold structure according to claim 2, characterized in that: The counterweight (16) maintains a gap of 1-3mm with the first module (11) and the third module (13) respectively.

4. The differentiated edge mold structure according to claim 1, characterized in that: The bottom of the first module (11), the second module (12), the third module (13) and the fourth module (14) are all provided with stepped grooves, and cross keys (17) are installed in the stepped grooves. The bottom plate (20) is provided with a sliding groove (21) corresponding to the cross keys (17), and the cross keys (17) are slidably connected to the sliding groove (21).

5. A differentiated edge mold structure according to claim 4, characterized in that: The lower end of the cross key (17) and the corresponding groove (21) of the base plate (20) are fitted with a clearance of 0.15-0.3mm on one side.

6. The differentiated edge mold structure according to claim 1, characterized in that: Positioning locking posts (30) are respectively provided on the base plate (20) at the joint positions of the first module (11), the second module (12), the third module (13) and the fourth module (14). Positioning pins (18) are respectively provided on the side of the first module (11), the second module (12), the third module (13) and the fourth module (14) along the length direction. The positioning locking posts (30) are provided with guide grooves (31) corresponding to the positioning pins (18). The positioning pins (18) and guide grooves (31) slide together.

7. A differentiated edge mold structure according to claim 6, characterized in that: The guide groove (31) has a locking hole (32) at the front end of the positioning pin (18) for locking the position of the four modules. The locking hole (32) is inserted into the front end of the positioning pin (18), and the positioning pin (18) is elastically telescopically connected to the side mold body (10).

8. A differentiated edge mold structure according to claim 6, characterized in that: The top of the positioning locking pin (30) is provided with a positioning pin (33), and a through groove (41) is provided on the top template (40) corresponding to the positioning pin (33). The positioning pin (33) and the through groove (41) are inserted and matched to improve the positioning accuracy of the top template.

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