Casting tool for automobile parts

Abstract

The utility model relates to the technical field of casting equipment, in particular to an automobile part casting tool which comprises a base and a moving seat, a lower mold and an upper mold are arranged on the base and the moving seat respectively, a snakelike heat exchange pipe is arranged in the base and located below the lower mold, the heat exchange pipe is connected with a refrigerating machine, and an inlet and an outlet of the heat exchange pipe communicate with vertical flow guide pipes. A snakelike circulating pipe is arranged in the position, located above the upper die, in the movable base, an inlet and an outlet of the circulating pipe penetrate through the upper die and correspond to the flow guide pipe, a conical closing opening is formed in the position, at the inlet of the heat exchange pipe, in the flow guide pipe, a ball valve is arranged at the conical closing opening, and a jacking spring is arranged between the ball valve and the flow guide pipe. An ejector rod matched with the ball valve is suspended below the inlet of the circulating pipe, and a one-way valve is arranged in the flow guide pipe at the outlet of the heat exchange pipe. The cooling efficiency is improved, and the problem of casting cracking caused by sudden cooling is also avoided.

Description

Technical Field

[0001] This application relates to the technical field of casting equipment, and particularly to a casting tooling for automotive parts. Background Art

[0002] Automotive parts are various units that make up an entire vehicle and products that serve the vehicle. There is a wide variety of automotive parts, such as the engine assembly, cylinders and components in the engine system; the front axle, rear axle, axle housing, etc. in the running system. Many of these components are formed through casting, such as the front axle and rear axle.

[0003] The main tooling used in casting is the upper and lower molds, as well as the pouring system and cooling system. Among them, the cooling system is used to cool the casting, which plays a role in accelerating the forming process and reducing the cooling waiting time after forming. In order to quickly demold and improve production efficiency, many enterprises have invested a lot of research in improving the cooling effect.

[0004] Existing ones, such as in the patent document with the publication number CN 218340987 U, disclose a casting tooling for automotive parts, mainly including an upper shell and a lower shell. An upper mold and a lower mold are respectively provided on the upper shell and the lower shell. The upper shell is driven to move vertically by an electric telescopic rod, and then the opening and closing of the upper and lower molds are controlled. An upper water tank and a lower water tank are respectively provided inside the upper and lower shells of the upper shell. The upper and lower water tanks are closed to form a sealed cooling chamber. An inlet pipe and a return pipe are provided on the side wall of the lower water tank to form a water flow rotation channel. After the upper and lower shells are closed, the upper and lower molds are suspended in the water tank. Cold water is injected into the inlet pipe to immerse the upper and lower molds, increasing the contact area between the cold water and the mold surface, thereby accelerating heat exchange and improving the cooling efficiency.

[0005] However, there are some problems in the use of the above patent:

[0006] 1. Both the inlet pipe and the return pipe are arranged in the lower water tank, making the water injection and drainage adjacent. Some cooling water is discharged without entering the upper water tank and does not undergo heat exchange, resulting in heat exchange waste. There is even a problem that the casting cracks due to inconsistent cooling states of the upper and lower molds;

[0007] 2. This patent increases the heat exchange area by using cooling water to wrap the upper and lower molds. However, it should be noted that although the heat exchange efficiency can be improved by wrapping heat exchange, the cooling rate also increases. Sudden cooling may cause problems such as cracks in the just-formed casting, affecting the forming quality;

[0008] 3. The upper and lower molds are suspended, and their stability needs to be verified when being impacted by cold water and die pressing.

[0009] Therefore, this application provides a casting tooling for automotive parts to improve the cooling efficiency and reduce heat exchange waste. Utility Model Content

[0010] The purpose of this application is to solve the problems existing in the prior art, and a casting tooling for automotive parts is proposed.

[0011] To achieve the above object, the following technical solutions are adopted in this application:

[0012] The casting tooling for automotive parts includes a base and a moving seat. The moving seat is vertically moved by a driving device. A lower mold and an upper mold are respectively arranged on the base and the moving seat. A serpentine heat exchange tube is arranged below the lower mold in the base. The heat exchange tube is connected to a refrigerator. The inlet and outlet of the heat exchange tube are both communicated with a vertical diversion tube. The diversion tube penetrates through the lower mold. A serpentine circulation tube is arranged above the upper mold in the moving seat. The inlet and outlet of the circulation tube penetrate through the upper mold and correspond to the diversion tube. A conical shrinkage is arranged in the diversion tube at the inlet of the heat exchange tube. A ball valve is arranged at the conical shrinkage. A top spring is arranged between the ball valve and the diversion tube. A top rod cooperating with the ball valve is suspended below the inlet of the circulation tube. A one-way valve is arranged in the diversion tube at the outlet of the heat exchange tube.

[0013] Preferably, an installation cavity is arranged on the end face of the base, and the lower mold is embedded in the installation cavity.

[0014] Preferably, a plurality of heat conducting plates are arrayed at the bottom end of the lower mold, and the heat conducting plates are located at the bent and swirling parts of the heat exchange tube.

[0015] Preferably, a connecting tube is inserted at the inlet of the circulation tube. The connecting tube corresponds to the diversion tube. The lower end of the connecting tube is a conical hopper. The top rod is arranged at the bottom end of the conical hopper. A plurality of air holes are annularly arrayed on the side wall of the conical hopper.

[0016] Preferably, a jack is arranged on the end face of the lower mold at the diversion tube at the inlet end of the heat exchange tube, and the diversion tube at the inlet end of the heat exchange tube is embedded at the bottom end of the jack.

[0017] Preferably, the connecting tube and the circulation tube are detachably connected.

[0018] Preferably, the driving device includes two groups of hydraulic rods symmetrically arranged on both sides of the base, and the extending ends of the two hydraulic rods are fixedly connected to the side wall of the moving seat.

[0019] Preferably, bushings are arranged on both sides of the moving seat, and vertical guide columns are sleeved in the bushings.

[0020] Compared with the prior art, this application provides a casting tooling for automotive parts, which has the following beneficial effects:

[0021] After pouring is completed, start the refrigerator. The refrigerant in the refrigerator is transported into the heat exchange tubes through the pump body to exchange heat with the lower mold, and the lower mold is cooled. After the upper mold and the lower mold are closed, the inlet and outlet of the circulation pipe are respectively aligned with the two diversion pipes, and the ejector rod descends against the ball valve, thereby opening the diversion pipe at the inlet end of the heat exchange tube, enabling the heat exchange tube to communicate with the circulation pipe, and the refrigerant enters the circulation pipe to cool the upper mold.

[0022] Since both the heat exchange tubes and the circulation pipe are serpentine, the heat exchange area is greatly increased, the heat exchange quantity is improved, and thus the heat exchange efficiency is improved, and the casting efficiency is enhanced. Moreover, through the heat exchange between the heat exchange tubes and the circulation pipe in contact, the heat exchange is gradual. Compared with the cold water coating, there will be no problem of sudden cooling leading to gradual cracking; and the heat exchange quantity is balanced, so that the cooling state is stable.

[0023] Other advantages, objectives, and features of the present application will, to some extent, be elaborated in the subsequent description; and to some extent, based on the study of the following text, will be obvious to those skilled in the art; or, can be learned from the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional schematic diagram of the present application.

[0025] Figure 2 is a front view schematic diagram of the present application.

[0026] Figure 3 is a sectional view schematic diagram of the present application.

[0027] Figure 4 is a sectional view schematic diagram of the circulation pipe in the upper mold of the present application.

[0028] Figure 5 is a sectional view schematic diagram of the heat exchange tube in the lower mold of the present application.

[0029] Figure 6 is of the present application Figure 3 partial schematic diagram at position A.

[0030] Figure 7 is of the present application Figure 3 partial schematic diagram at position B.

[0031] In the figure: 1, base; 2, moving seat; 3, lower mold; 4, upper mold; 5, heat exchange tube; 6, circulation pipe; 7, diversion pipe; 8, connecting pipe; 9, ball valve; 10, ejector rod; 11, heat conducting plate; 12, driving device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will combine the attached drawings in the embodiments of the present application Figures 1-7, a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0033] To solve the problems existing in the prior art, this embodiment provides a casting tooling for automotive parts, including a base 1 and a moving seat 2. The moving seat 2 is vertically moved by a driving device 12. A lower mold 3 and an upper mold 4 are respectively provided on the base 1 and the moving seat 2. A pouring tube connected to the pouring system is provided on the side wall of the upper mold 4. A stop valve is provided in the pouring tube to regulate the flow of the molten metal and prevent the molten metal from dripping. A serpentine heat exchange tube 5 is provided below the lower mold 3 inside the base 1. The heat exchange tube 5 is connected to a refrigerator. The inlet and outlet of the heat exchange tube 5 are both communicated with a vertical diversion tube 7. The diversion tube 7 penetrates through the lower mold 3. A serpentine circulation tube 6 is provided above the upper mold 4 inside the moving seat 2. The inlet and outlet of the circulation tube 6 penetrate through the upper mold 4 and correspond to the diversion tube 7. A tapered necking is provided in the diversion tube 7 at the inlet of the heat exchange tube 5. A ball valve 9 is provided at the tapered necking. A top spring is provided between the ball valve 9 and the diversion tube 7. A top rod 10 cooperating with the ball valve 9 is suspended below the inlet of the circulation tube 6. A check valve is provided in the diversion tube 7 at the outlet of the heat exchange tube 5.

[0034] Details of the principle of this embodiment:

[0035] A casting tooling for automotive parts, including a base 1 and a moving seat 2. The moving seat 2 is vertically moved by a driving device 12. The lower mold 3 is embedded in the upper end surface of the base 1, and the upper mold 4 is embedded in the lower end surface of the moving seat 2. The lower mold 3 and the upper mold 4 are both embedded and installed, making the upper and lower molds more stable when closing and impacting. A serpentine heat exchange tube 5 is provided below the lower mold 3 inside the base 1. The heat exchange tube 5 is connected to a refrigerator (the structure drawing of the refrigerator is not shown) outside the base 1. Cooling fluid is provided by the refrigerator for heat exchange and cooling. The outlet of the refrigeration chamber is communicated with the inlet end of the heat exchange tube 5 through a pump body, and the outlet end of the heat exchange tube 5 is communicated with the inlet end of the cooling chamber, thereby forming a heat exchange cycle for cooling.

[0036] The inlet and outlet of the heat exchange tube 5 are both communicated with a vertical diversion tube 7. The diversion tube 7 penetrates through the lower mold 3 and exits from the upper end of the lower mold 3. A serpentine circulation tube 6 is provided above the upper mold 4 inside the moving seat 2. The inlet and outlet of the circulation tube 6 penetrate through the upper mold 4 and exit from the bottom end of the upper mold 4. The inlet and outlet of the circulation tube 6 correspond to the two diversion tubes 7 one by one. A tapered necking is provided in the diversion tube 7 at the inlet end of the heat exchange tube 5. A ball valve 9 is provided at the tapered necking. A top spring is provided between the ball valve 9 and the diversion tube 7. A top rod 10 cooperating with the ball valve 9 is suspended below the inlet of the circulation tube 6. A check valve is provided in the diversion tube 7 at the outlet of the heat exchange tube 5. The check valve makes it impossible for the cooling fluid to be discharged from the diversion tube 7 at the outlet end of the heat exchange tube 5.

[0037] During use, the upper mold 4 is manipulated to move downward by the driving device 12, so that the ports of the upper mold 4 and the lower mold 3 are combined to form a casting chamber, and then molten metal is injected through the pouring pipe. After pouring is completed, the refrigerator is started, and the refrigerating fluid in the refrigerator is transported into the heat exchange pipe 5 by the pump body. Since the heat exchange pipe 5 is below the lower mold 3, heat exchange is carried out with the lower mold 3 to cool the lower mold 3. After the upper mold 4 and the lower mold 3 are closed, the inlet and outlet of the circulation pipe 6 are respectively aligned and penetrated with the two diversion pipes 7, so that the ejector rod 10 descends against the ball valve 9, thereby opening the diversion pipe 7 at the inlet end of the heat exchange pipe 5, making the heat exchange pipe 5 communicate with the circulation pipe 6, and the refrigerating fluid enters the circulation pipe 6 to cool the upper mold 4.

[0038] Since both the heat exchange pipe 5 and the circulation pipe 6 are serpentine, the heat exchange area is greatly increased, the heat exchange amount is increased, and then the heat exchange efficiency is improved, and the casting efficiency is improved. And through the heat exchange between the heat exchange pipe 5 and the circulation pipe 6, the heat exchange is gradual. Compared with cold water coating, there will be no problem of sudden cracking caused by sudden cooling; and the heat exchange amount is balanced, so that the cooling state is stable.

[0039] In this embodiment, temperature sensors are embedded in the side walls of the upper mold 4 and the lower mold 3 to monitor the temperature of the casting, so as to regulate the conveying efficiency of the pump body and the refrigerating power of the refrigerator.

[0040] In this embodiment, due to the penetration of the circulation pipe 6 and the heat exchange pipe 5, it is necessary to push the ball valve 9 open by the ejector rod 10. When the upper mold 4 rises, the ejector rod 10 gradually separates from the ball valve 9. During this process, there may be a gap in the diversion pipe 7, resulting in the overflow of the cooling fluid. If the cooling fluid is a liquid, the liquid overflow will make the working place wet and dirty, affecting the casting operation. Therefore, in this embodiment, the cooling fluid is cold gas.

[0041] In this embodiment, a sealing groove is provided along the side of the mold cavity on the lower mold 3, and a sealing ring corresponding to the sealing groove is provided at the bottom end of the upper mold 4. When the upper mold 4 and the lower mold 3 are closed, the sealing ring is inserted into the sealing groove to increase the tightness between the upper mold 4 and the lower mold 3 and prevent the molten metal from overflowing.

[0042] In a further embodiment of this solution, an installation cavity is provided on the end face of the base 1, and the lower mold 3 is embedded in the installation cavity. It is used for the installation and fixation of the lower mold 3 and leaves an installation space for components such as the heat exchange pipe 5.

[0043] In a further embodiment of this solution, a plurality of heat conducting plates 11 are arranged in an array at the bottom end of the lower mold 3, and the heat conducting plates 11 are located at the bending and turning places of the heat exchange pipe 5. The heat of the lower mold 3 is guided through the heat conducting plates 11 to increase the heat dissipation area of the lower mold 3, and then the heat exchange area with the heat exchange pipe 5 is increased, and the heat exchange efficiency is improved.

[0044] In a further embodiment of this solution, a connecting pipe 8 is inserted into the inlet of the circulation pipe 6. The connecting pipe 8 corresponds to the diversion pipe 7. The lower end of the connecting pipe 8 is a conical hopper. The ejector rod 10 is arranged at the bottom end of the conical hopper. A plurality of air holes are annularly arranged on the side wall of the conical hopper. When the upper mold 4 and the lower mold 3 are closed, the connecting pipe 8 is inserted into the diversion pipe 7 and communicates with the diversion pipe 7 through the air holes, increasing the tightness of the connection between the circulation pipe 6 and the diversion pipe 7 and preventing the cooling fluid from overflowing.

[0045] In a further embodiment of this solution, a jack is provided at the diversion pipe 7 at the inlet end of the heat exchange pipe 5 on the end face of the lower mold 3. The diversion pipe 7 at the inlet end of the heat exchange pipe 5 is embedded at the bottom end of the jack. The depth of the jack satisfies that when the outer wall of the connecting pipe 8 just inserts into the jack, the ejector rod 10 has not contacted the ball valve 9 yet. In this way, during the process of the ball valve 9 being pushed open and reset, the connecting pipe 8 and the diversion pipe 7 are always in a sealed connection state, preventing the cooling fluid from leaking.

[0046] In a further embodiment of this solution, the connecting pipe 8 is detachably connected to the circulation pipe 6.

[0047] For example, internal threads are provided on the inner wall of the inlet end of the circulation pipe 6, and external threads are provided at the end of the connecting pipe 8, so that the circulation pipe 6 and the connecting pipe 8 are threadedly connected, realizing the detachable connection between the connecting pipe 8 and the circulation pipe 6; or flanges are provided at the corresponding ends of the circulation pipe 6 and the connecting pipe 8, and the connecting pipe 8 and the circulation pipe 6 are detachably connected through fasteners.

[0048] The detachable connection between the connecting pipe 8 and the circulation pipe 6 enables the reverse flow state between the circulation pipe 6 and the heat exchange pipe 5 to be adjusted: removing the connecting pipe 8 separates the circulation pipe 6 from the heat exchange pipe 5; installing the connecting pipe 8 makes the circulation pipe 6 communicate with the heat exchange pipe 5. Then, according to the actual production requirements, the cooling state of the upper mold 4 can be controlled.

[0049] In a further embodiment of this solution, the driving device 12 includes two hydraulic rods symmetrically arranged on both sides of the base 1. The extending ends of the two hydraulic rods are fixedly connected to the side wall of the moving seat 2. The vertical movement of the moving seat 2 and the upper mold 4 is controlled by the hydraulic rods, with strong load-bearing capacity and stable operation.

[0050] In a further embodiment of this solution, bushings are provided on both sides of the moving seat 2, and vertical guide posts are sleeved inside the bushings. The guide posts are arranged on the side of the base 1. Through the cooperation of the bushings and the guide posts, the stability of the vertical movement of the moving seat 2 is improved, ensuring that the upper mold 4 and the lower mold 3 can be aligned when they are closed.

[0051] The above is only a preferred specific embodiment of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application, according to the technical solution and application concept of this application, making equivalent replacements or changes, should be covered by the protection scope of this application.

[0052] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. Foundry tooling for automotive parts, characterized in that, It includes a base (1) and a moving seat (2). The moving seat (2) is driven by a driving device (12) to move vertically. A lower mold (3) and an upper mold (4) are respectively arranged on the base (1) and the moving seat (2). A serpentine heat exchange tube (5) is arranged below the lower mold (3) inside the base (1). The heat exchange tube (5) is connected to a refrigerator. Both the inlet and outlet of the heat exchange tube (5) are communicated with a vertical flow guide tube (7). The flow guide tube (7) penetrates through the lower mold (3). A serpentine circulation tube (6) is arranged above the upper mold (4) inside the moving seat (2). The inlet and outlet of the circulation tube (6) penetrate through the upper mold (4) and correspond to the flow guide tube (7). A conical necking is arranged in the flow guide tube (7) at the inlet of the heat exchange tube (5). A ball valve (9) is arranged at the conical necking. A top spring is arranged between the ball valve (9) and the flow guide tube (7). A push rod (10) cooperating with the ball valve (9) is suspended below the inlet of the circulation tube (6). A check valve is arranged in the flow guide tube (7) at the outlet of the heat exchange tube (5).

2. The automotive parts casting tooling according to claim 1, characterized in that, An installation cavity is arranged on the end face of the base (1), and the lower mold (3) is embedded in the installation cavity.

3. The casting tooling for automotive parts according to claim 1, characterized in that, A plurality of heat conducting plates (11) are arrayed at the bottom end of the lower mold (3), and the heat conducting plates (11) are located at the bending and turning positions of the heat exchange tube (5).

4. The automotive parts casting tooling according to claim 1, characterized in that A connecting tube (8) is inserted at the inlet of the circulation tube (6). The connecting tube (8) corresponds to the flow guide tube (7). The lower end of the connecting tube (8) is a conical hopper. The push rod (10) is arranged at the bottom end of the conical hopper. A plurality of air holes are annularly arrayed on the side wall of the conical hopper.

5. The casting tooling for automotive parts according to claim 4, characterized in that, An insertion hole is arranged on the end face of the lower mold (3) at the flow guide tube (7) at the inlet end of the heat exchange tube (5), and the flow guide tube (7) at the inlet end of the heat exchange tube (5) is embedded at the bottom end of the insertion hole.

6. The automotive parts casting tooling according to claim 4, characterized in that, The connecting tube (8) is detachably connected to the circulation tube (6).

7. The casting tooling for automotive parts according to claim 6, characterized in that, The driving device (12) includes two groups of hydraulic rods symmetrically arranged on both sides of the base (1), and the extending ends of the two hydraulic rods are fixedly connected to the side wall of the moving seat (2).

8. The casting tooling for automotive parts according to claim 7, characterized in that, Bushings are arranged on both sides of the moving seat (2), and vertical guide columns are sleeved inside the bushings.

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