Top mold cooling structure

Abstract

The utility model relates to the technical field of aluminum alloy hub casting molds, and discloses a top mold cooling structure which comprises a top mold body, a cooling water tank is arranged on the top mold body and serves as a channel for cooling water to flow, a sealing cover plate is arranged on the cooling water tank, and a water inlet pipe and a water return pipe which are communicated with the cooling water tank are connected to the sealing cover plate. The water inlet pipe is connected with a cooling water source. According to the utility model, the cooling water tank is arranged on the top die body, so that the traditional structural form that a cooling water ring is arranged on the back cavity of the top die is replaced, the space of the back cavity is saved, the configuration of the cooling structure is simplified, and the design, manufacture and debugging of a cooling mechanism of the top die are facilitated; the cooling water tank eliminates the hidden danger of cracking and water leakage of a traditional cooling water ring, and the production efficiency is guaranteed; and the problems of cracking, water leakage and interference of a traditional cooling water ring do not need to be considered, so that the groove width of the cooling water groove can be designed to be wider, a larger cooling channel is obtained, the cooling efficiency is improved, and auxiliary configuration of a traditional cooling air pipe can be omitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminum alloy wheel hub casting mould technical field especially, relates to a top die cooling structure. BACKGROUND

[0002] When aluminum alloy wheel hub is cast, the mold formed by the combination of the top die, the side die and the bottom die forms a cavity for the filling of aluminum liquid, and then the cavity is filled, pressure is maintained and cooled to cast a wheel hub blank. The top die in the mold is a cylindrical structure corresponding to the wheel well modeling of the wheel hub blank. To meet the cooling needs in the wheel hub casting process, a cooling structure is usually arranged in the cylindrical structure of the top die. The existing top die cooling structure includes a cooling water pipe for cooling the diverging cone, a cooling water ring arranged corresponding to the flange disc part of the wheel hub, and a cooling air pipe for auxiliary cooling.

[0003] At present, with the continuous improvement of production efficiency, the cooling demand of the top die is also increasing, and the design of the cooling structure is becoming more and more complex. However, due to the limited space of the back cavity of the top die, the layout of the cooling structure needs to fully consider the interference problem between the components, and the positions of the cooling air pipe and the cooling water ring need to be repeatedly adjusted and optimized. In addition, the control variables of the cooling water pipe, the cooling water ring and the cooling air pipe need to be debugged for a long time before they can be put into use. The design is difficult, the adjustment period is long, the failure rate of the complex cooling structure is high, the daily maintenance is inconvenient, and the operation efficiency is affected. In addition, in order to reduce the risk of cracking and water leakage of the cooling water ring during use, the diameter of the cooling water ring is usually not more than 8mm, which limits its cooling efficiency. Therefore, it is usually necessary to configure a cooling air pipe for auxiliary cooling, which further complicates the structure configuration.

[0004] Therefore, it is urgent to develop a new type of top die cooling structure for practical production. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above problems, and provides a top die cooling structure to solve the problems of the existing top die cooling structure, such as difficult design, complex structure, high failure rate and low cooling efficiency.

[0006] To solve the above technical problems, the utility model adopts the technical scheme that:

[0007] A top die cooling structure, comprising a top die body, a cooling water groove is opened on the top die body as a channel for cooling water flow, a sealing cover plate is arranged on the cooling water groove to seal the cooling water groove and form an annular sealed chamber, a water inlet pipe and a water return pipe are connected to the sealing cover plate, the water inlet pipe and the water return pipe are respectively connected to the cooling water groove, and the water inlet pipe is connected to a cooling water source.

[0008] Preferably, the cooling water groove is opened in the back cavity of the top die body and is arranged corresponding to the flange disc part of the wheel hub blank.

[0009] Preferably, the cooling water tank is in the shape of a plum blossom in whole.

[0010] Preferably, the cooling water tank is in the shape of a plum blossom in whole.

[0011] Preferably, the cooling water tank is in the shape of a plum blossom in whole.

[0012] Preferably, the cooling water tank is in the shape of a plum blossom in whole.

[0013] The utility model discloses a cooling water tank is arranged on the top die body, replaces the traditional cooling water ring structure form that the back cavity is arranged on the top die, saves the back cavity space, simplifies the cooling structure configuration, facilitates the design, the manufacture and the debugging of top die cooling mechanism, and the cooling water tank of opening in the top die body eliminates the hidden danger of traditional cooling water ring crack and water leakage, reduces the failure rate of cooling structure, guarantees production efficiency, and because the traditional cooling water ring crack and water leakage and interference problem are not needed to consider, makes the tank width of cooling water tank can be designed wider, obtains greater cooling passage to improve the cooling efficiency, can save the auxiliary configuration of traditional cooling air pipe, and simplifies the cooling structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described in detail below in combination with the drawings and specific embodiment.

[0015] Figure 1 It is the structural schematic diagram of the utility model.

[0016] Figure 2 It is Figure 1 The bottom view after hiding the sealing cover plate.

[0017] In the drawing: 10 - top die body, 11 - cooling water tank, 12 - sealing cover plate, 13 - water inlet pipe, 14 - backwater pipe, 15 - cooling cavity, 16 - thermal insulation cotton layer. PREFERRED EMBODIMENT

[0018] The technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment, and obviously, the described embodiment only is a part of the embodiment of the utility model, not all the embodiment.

[0019] As Figures 1-2As shown, a top die cooling structure comprises a top die body 10, a cooling water groove 11 is arranged on the top die body 10 as a channel for cooling water flow, a sealing cover plate 12 is arranged on the cooling water groove 11 to seal the cooling water groove 11 to form a ring-shaped closed chamber, and a water inlet pipe 13 and a water return pipe 14 are connected to the sealing cover plate 12 and communicate with the cooling water groove 11. The water inlet pipe 13 is connected to a cooling water source to supply cooling water to the cooling water groove 11, and the cooling water after heat exchange is discharged from the cooling water groove 11 through the water return pipe 14. In use, the cooling water is supplied into the cooling water groove 11 through the water inlet pipe 13, exchanges heat with the top die body 10 in the cooling water groove 11, cools the top die body 10, and the cooling water after heat exchange is discharged through the water return pipe 14 to realize water cooling circulation of the top die body 10.

[0020] In this embodiment, the cooling water groove 11 is arranged on the top die body 10 instead of the traditional cooling water ring arranged on the back cavity of the top die, which saves the space of the back cavity, simplifies the configuration of the cooling structure, and facilitates the design, manufacture and debugging of the top die cooling mechanism. At the same time, the cooling water groove 11 arranged on the top die body 10 eliminates the risk of cracking and water leakage of the traditional cooling water ring, reduces the failure rate of the cooling structure, and ensures the production efficiency. Moreover, without considering the cracking and water leakage of the traditional cooling water ring and the interference problem, the groove width of the cooling water groove 11 can be designed wider to obtain a larger cooling channel, thereby improving the cooling efficiency and eliminating the auxiliary configuration of the traditional cooling air pipe to simplify the cooling structure.

[0021] Preferably, the cooling water groove 11 is arranged in the back cavity of the top die body 10 and corresponds to the flange part of the hub blank to ensure the cooling efficiency of the thick part of the hub blank.

[0022] Preferably, the cooling water groove 11 is in the shape of a plum blossom, which can effectively avoid the center ejector pin and does not affect the demolding action of the hub blank. On the other hand, the plum blossom-shaped cooling water groove 11 prolongs the length of the water channel and increases the cooling area to improve the cooling efficiency.

[0023] Preferably, the cooling water groove 11 is provided with a cooling cavity 15 that can accommodate cooling water, the cooling cavity 15 is formed by a recess structure lower than the flange end face of the top die body 10, and the cooling cavity 15 communicates with the cooling water groove 11. In use, part of the cooling water will enter the cooling cavity 15 to cool the top die body 10. The provision of the cooling cavity 15 increases the cooling area and further improves the cooling efficiency.

[0024] Preferably, the cooling cavity 15 is arranged corresponding to the hub root of the hub blank to accelerate the cooling rate of the thick part of the spoke root.

[0025] Preferably, the cooling structure further comprises a heat insulation cotton layer 16 arranged on the top die body 10, which covers the inner cavity of the top die body 10 and is arranged at the rim position of the hub blank, so as to slow down the cooling rate of the rim position, to avoid the adverse cooling of the relatively thin rim position, to affect the feeding of the aluminum liquid, and even to cause quality problems such as flow interruption, and to ensure the casting quality of the hub blank.

[0026] The above disclosed is only a specific embodiment of the present application, but the present application is not limited to this. For those skilled in the art, the deformation made without departing from the principle of the present application shall be considered as belonging to the protection of the present application.

Claims

1. A top die cooling structure characterized by: The application relates to a top die body (10) provided with a cooling water groove (11) as a cooling water flow channel, a sealing cover plate (12) arranged on the cooling water groove (11) to seal the cooling water groove (11) to form a ring-shaped closed chamber, a water inlet pipe (13) and a water return pipe (14) connected to the sealing cover plate (12), the water inlet pipe (13) and the water return pipe (14) being communicated with the cooling water groove (11) respectively, and the water inlet pipe (13) being connected with a cooling water source.

2. A top die cooling structure according to claim 1, wherein: The cooling water groove (11) is arranged in a back cavity of the top die body (10) and corresponds to a flange disc part of a hub blank.

3. A top die cooling structure according to claim 1, wherein: The cooling water groove (11) is in a plum blossom shape.

4. A top die cooling structure according to claim 2, wherein: A cooling cavity (15) for containing cooling water is arranged around the cooling water groove (11), the cooling cavity (15) is formed by a recess structure lower than a flange disc end surface of the top die body (10), and the cooling cavity (15) is communicated with the cooling water groove (11).

5. A top die cooling structure according to claim 4, wherein: The cooling cavity (15) is arranged at a hub root of the hub blank to accelerate the cooling rate of a thickened part at a spoke root.

6. A top die cooling structure according to claim 5, wherein: A heat preservation cotton layer (16) is arranged on the top die body (10), the heat preservation cotton layer (16) covers an inner cavity of the top die body (10) and corresponds to a rim part of the hub blank.

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