Hub casting mold capable of preventing flash

Abstract

The utility model discloses a hub casting mold capable of preventing flash. An upper mold and a side mold are locked by a locking mechanism; the locking mechanism comprises a first locking platform surrounding the upper die and a second locking platform located on the side die and matched with the first locking platform. The locking mechanism further comprises at least one locking protruding block, and the locking protruding block is located at the bottom of the first locking platform and arranged around the first locking platform. The locking mechanism further comprises locking grooves which are located in the second locking platform and correspond to the first locking protruding blocks in number and position. And when the upper mold and the side mold are closed, the locking convex block is embedded into the locking groove, and the first locking platform is attached to the second locking platform. According to the utility model, flash is not easy to form, so that the surface of the finally formed hub is smooth, and the forming process of the hub is simplified.

Description

Technical Field

[0001] The utility model relates to a mould, and more specifically to a hub casting mould for preventing flash. Background Art

[0002] As a key component of vehicles such as automobiles and motorcycles, the performance of the hub is directly related to the safety, stability and driving efficiency of the vehicle. Flash during hub processing, also known as overflow edge, burr, etc., is one of the common problems in mould processing. In the existing design, the upper mould and the side mould are directly connected through a plane, and only rely on the clamping force between the two to lock this plane.

[0003] The formation of flash is largely due to the failure of the clamping force of the mould or the machine tool, resulting in the extrusion and overflow of the melt at the mould parting surface, thus generating thin sheet-like superfluous materials at the edge of the product.

[0004] The existing technology group usually takes replacing the machine tool to solve the problem of flash caused by clamping failure, but frequently replacing the machine tool makes it difficult to reduce the production cost. Chinese utility model CN216176572U attempts to eliminate flash by changing the mould closing method. However, the problem of clamping failure with a long service life of the machine tool has not been solved yet. Summary of the Invention

[0005] The main purpose of the utility model is to solve the problem of easy generation of flash during hub processing in the prior art in view of the above defects and deficiencies.

[0006] A hub casting mould for preventing flash, which successively includes an upper template, an upper mould, a lower mould and a bottom plate from top to bottom. A side mould surrounds the sides of the upper mould and the lower mould. The upper mould, the side mould and the lower mould enclose a closed mould cavity. A runner is arranged in the side mould, and the mould cavity is communicated with the runner. It is characterized in that: the upper mould and the side mould are locked by a locking mechanism; the locking mechanism includes a first locking platform surrounding the upper mould and a second locking platform located on the side mould and matching with the first locking platform; the locking mechanism further includes at least one locking convex block, which is located at the bottom of the first locking platform and surrounds the first locking platform; the locking mechanism further includes locking grooves located on the second locking platform, the number and position of which correspond to those of the first locking convex block; when the upper mould and the side mould are closed, the locking convex block is embedded into the locking groove, and the first locking platform is attached to the second locking platform.

[0007] The utility model is provided with a locking mechanism at the connection between the upper mold and the side mold. Specifically, the upper mold and the side mold are combined through a locking convex block and a locking groove to increase the contact area between the upper mold and the side mold. By changing the contact position direction of the locking convex block and the locking groove multiple times, the two are tightly fitted without relative displacement. This not only makes it difficult for the upper mold and the side mold to leak the melt and form flash, but even if the melt leaks, the leakage range can be limited within the first locking platform and the second locking platform, ensuring the personal safety of workers, and making the surface of the finally formed wheel hub smooth without the need for complex processing such as turning and cutting.

[0008] Further, the first locking platform is concentrically arranged with the locking convex block.

[0009] Furthermore, on the locking platform, there is at least one circular air gap surrounding the locking boss.

[0010] In the utility model, there is an air gap on the locking platform. After the upper mold and the side mold are closed, a small part of air will still be enclosed in the air gap. During operation, the air in the air gap will block the melt, locking the melt by the air gap and further preventing the generation of flash defects. The main structure of the air gap is a groove formed on the locking platform, and the air gap is formed after the groove absorbs air. Preferably, there is one air gap, and it is arranged on the inner side of the locking platform, that is, the side closer to the center of the circle, so as to isolate the melt as early as possible.

[0011] Further, the number of the runners is four; the connection parts of the four runners and the mold cavity are evenly distributed on the side surface of the mold cavity.

[0012] The utility model is provided with four runners and evenly arranges the runners on the side surface of the mold cavity (i.e., on the side mold), which can reduce the pressure on the contact surface between the local upper mold and the side mold near the runner during molding, and further prevent the generation of flash defects.

[0013] Further, it further includes an upper template and a lower template. The bottom plate is arranged below the lower mold; the upper template wraps above the upper mold; it further includes a ejector rod plate; the ejector rod plate is arranged above the upper template. The ejector rod plate is provided with at least one ejector rod. The ejector rod is vertically established. One end of the ejector rod passes through the upper template, the upper mold and is movably connected up and down with the mold cavity, and the other end of the ejector rod is fixed on the ejector rod plate; it further includes an ejector rod pressure plate, and the ejector rod pressure plate is arranged on the top of the ejector rod plate. It further includes a machine table connecting plate; the machine table connecting plate is located above the ejector rod pressure plate and is respectively used for supporting the ejector rod pressure plate, the ejector rod and the upper template.

[0014] The upper mold can be lifted vertically to complete demolding. The upper template can provide an installation position for the upper mold, and the bottom plate is the same. During demolding, the ejector pin, which is supported by the ejector pin plate and remains stationary, can be separated from the upper mold, thereby separating the workpiece from the upper mold. During operation, the ejector pin bears a large force, so an ejector pin pressing plate can also be provided at the top of the ejector pin plate to improve the load-bearing effect of the ejector pin.

[0015] There is one ejector pin, and one end of the ejector pin passes through the upper template, the upper mold and is movably connected up and down with the highest point of the mold cavity.

[0016] The present utility model provides a locking mechanism at the contact position between the upper mold and the side mold. By using the locking boss and the locking groove in the locking mechanism to increase the contact area, and by changing the contact position direction between the locking convex block and the locking groove multiple times, not only is it not easy for the upper mold and the side mold to have melt leakage and form flash, but even if melt leakage occurs, the leakage range can be made not to exceed the first locking platform and the second locking platform, ensuring the personal safety of workers, making the surface of the finally formed wheel hub smooth, and eliminating the need for complex treatments such as turning and milling, thus simplifying the forming process of the wheel hub.

[0017] The present invention will be further described below with reference to the accompanying drawings. Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional view of the present utility model.

[0019] Figure 2 It is a partial view of the present utility model.

[0020] Figure 3 It is an enlarged view of part A of the present utility model.

[0021] Figure 4 It is a top view schematic of the side mold of the present utility model. Detailed Embodiment

[0022] The present invention will be further explained and described below through specific embodiments. It should be understood that the purpose of the following embodiments is to make the technical solution of the present invention clearer and easier to understand, and does not limit the protection scope of the claims.

[0023] The present invention will be further described below through specific examples. Embodiment

[0024] In this embodiment, a wheel hub casting mold for preventing flash is as Figure 1 , Figure 2As shown in the figure, from top to bottom, it successively includes an upper template 1, an upper mold 2, a lower mold 3, and a bottom plate 4. The sides of the upper mold 2 and the lower mold 3 are surrounded by a side mold 5. The upper mold 2, the side mold 5, and the lower mold 3 enclose a closed mold cavity 6. A runner 51 is provided in the side mold 5, and the mold cavity 6 is communicated with the runner 51. The upper mold 2 and the side mold 5 are locked by a locking mechanism; the locking mechanism includes a first locking platform 21 surrounding the upper mold 2 and a second locking platform 52 located on the side mold 5 and matching the first locking platform 21; the locking mechanism further includes a locking bump 22, the locking bump 22 is located at the bottom of the first locking platform 21 and is arranged around the first locking platform 21; the locking mechanism further includes locking grooves 53 located on the second locking platform 52, the number and positions of which correspond to those of the first locking bump 22; when the upper mold 2 and the side mold 5 are closed, the locking bump 22 is embedded in the locking groove 53, and the first locking platform 21 is in contact with the second locking platform 52.

[0025] In addition to providing 1 locking bump, in other embodiments, those skilled in the art can also repeatedly arrange multiple locking mechanisms to prevent the upper mold and the side mold from shifting and enhance the locking effect.

[0026] Furthermore, the first locking platform 21 and the locking bump 22 are concentrically arranged to further enhance the locking effect.

[0027] Furthermore, as Figure 3 , a circular air gap 23 surrounding the locking boss 22 is provided on the locking platform 22.

[0028] In other embodiments, to improve the sealing effect of the locking mechanism, the number of air gaps can be increased.

[0029] Preferably, as Figure 4 , the number of the runners 51 is four; the connection parts of the four runners 51 and the mold cavity 6 are evenly distributed on the side of the mold cavity 6.

[0030] Preferably, it further includes a ejector plate 7, an ejector pressure plate 72, an upper template 1, a bottom plate 4, and a machine table connecting plate 8; the bottom plate 4 is arranged below the lower mold 3 and the two are fixedly connected; the upper template 1 wraps above the upper mold 2; the ejector plate 7 is arranged above the upper template 1, and the ejector plate 7 is provided with at least one ejector rod 71 which is vertically established. One end of the ejector rod 71 passes through the upper template 1 and the upper mold 2 and is vertically movably connected to the mold cavity 6. The other end of the ejector rod 71 is fixed on the ejector plate 7; the ejector pressure plate 72 is arranged at the top of the ejector plate 7; the machine table connecting plate 8 is located above the ejector plate 7 and is respectively used for supporting the ejector pressure plate, the ejector rod, and the upper template. The ejector rod 71 is one, and one end of the ejector rod 71 passes through the upper template and the upper mold and is vertically movably connected to the highest point of the mold cavity (in this embodiment, it is the position of the mold cavity forming the rim). After casting is completed, the upper mold rises, and the rim of the workpiece 9 (hub blank) is supported by the ejector rod 71 and does not rise, completing the demolding action.

[0031] The present invention is described by way of examples, but does not constitute a limitation to the present invention. Referring to the description of the present invention, other variations of the disclosed embodiments, such as those easily conceivable to professionals in the field, should fall within the scope defined by the claims of the present invention.

Claims

1. A hub casting mold for preventing flash, which successively includes an upper template, an upper mold, a lower mold, and a bottom plate from top to bottom. A side mold surrounds the sides of the upper mold and the lower mold. The upper mold, the side mold, and the lower mold enclose a closed mold cavity. A runner is arranged in the side mold, and the mold cavity is communicated with the runner. It is characterized in that: The upper mold and the side mold are locked by a locking mechanism; the locking mechanism includes a first locking platform surrounding the upper mold and a second locking platform located on the side mold and matching the first locking platform; the locking mechanism further includes at least one locking bump located at the bottom of the first locking platform and arranged around the first locking platform; the locking mechanism further includes locking grooves located on the second locking platform, with the quantity and positions corresponding to those of the first locking bumps; when the upper mold and the side mold are closed, the locking bumps are embedded in the locking grooves, and the first locking platform is in contact with the second locking platform.

2. The mold according to claim 1, characterized in that: The first locking platform is concentrically arranged with the locking bumps.

3. The mold according to claim 2, characterized in that: On the locking platform, there is at least one circular air gap surrounding the locking boss.

4. The mold according to any one of claims 1 to 3, characterized in that: The number of the runners is four; the connecting parts of the four runners and the mold cavity are evenly distributed on the side surface of the mold cavity.

5. The mold according to claim 4, wherein: It further includes an upper template and a lower template; the bottom plate is arranged below the lower mold; the upper template wraps above the upper mold.

6. The mold according to claim 5, characterized in that: It further includes an ejector plate; the ejector plate is arranged above the upper template, and the ejector plate is provided with at least one ejector rod, the ejector rod is vertically established, one end of the ejector rod passes through the upper template, the upper mold and is movably connected with the mold cavity up and down, and the other end of the ejector rod is fixed on the ejector plate.

7. The mold according to claim 6, characterized in that: It further includes an ejector rod pressure plate, and the ejector rod pressure plate is arranged at the top of the ejector plate.

8. The mold according to claim 7, characterized in that: It further includes a machine table connecting plate; the machine table connecting plate is located above the ejector rod pressure plate and is respectively used for supporting the ejector rod pressure plate, the ejector rod and the upper template.

9. The mold according to claim 8, characterized in that: There is one ejector rod, and one end of the ejector rod passes through the upper template, the upper mold and is movably connected with the highest point of the mold cavity up and down.

10. The mold according to claim 3, characterized in that: On the locking platform, there is a circular air gap surrounding the locking boss.

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