Engine exhaust pipe casting device

Abstract

The utility model discloses an engine exhaust pipe casting device, and particularly relates to the technical field of exhaust pipe casting, the engine exhaust pipe casting device comprises a base fixed on an operation table, an upper die is movably arranged at the upper end of the base, two moving rods are fixedly arranged at the upper end of the upper die, and the upper ends of the moving rods are fixedly connected with the bottom end of a punching head of a punching machine; the upper end of the base is provided with a mold dismounting device capable of transferring the cast engine exhaust pipe, and the mold dismounting device is used for transferring the cast engine exhaust pipe and making preparations for next casting; the mold dismounting device comprises a cooling groove, the cooling groove is formed in the upper end of the base, and limiting grooves are formed in the two sides of the cooling groove; and a porous injection device capable of injecting melt is arranged at the upper end of the upper mold and is used for injecting the melt from a plurality of different positions. By means of the die dismounting device, the cooling waiting time can be shortened, the production efficiency can be improved, and by means of the multi-hole injection device, damage to products can be reduced, and the problem that corners of an engine exhaust pipe are missing is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust pipe casting, and more specifically, the utility model relates to a casting device for an engine exhaust pipe. Background Art

[0002] The engine exhaust pipe is connected to the cylinder, which collects the exhaust gas of each cylinder and guides it into the exhaust manifold. It is a pipe with branches. The function of the engine exhaust pipe is to minimize the exhaust resistance and avoid mutual interference between cylinders. With the development of automotive technology, it is required that the engine exhaust pipe has good high-temperature oxidation resistance, stable microstructure, small coefficient of thermal expansion, excellent high-temperature strength, good process performance and low cost; for this purpose, a casting device for an engine exhaust pipe is proposed for casting the engine exhaust pipe.

[0003] After retrieval, for example, a Chinese patent application with the publication number CN212734050U discloses a casting device for an automobile engine exhaust pipe, which is provided with a demoulding device. The demoulding device is connected to the pressing plate through a connecting rod. After the mold casting is completed and cooled, the telescopic rod drives the pressing plate to shrink upward, so that the pressing plate drives the demoulding device through the connecting rod, and the model automatically detaches from the mold; an air vent groove is provided. After the casting is completed, a large amount of gas will be generated during the cooling process of the model. If the gas is not discharged, a large number of protrusions will appear on the model after cooling. The setting of the air vent groove allows the gas to flow out through the air vent groove, ensuring the quality of the model; a cooling device and cooling pipes are provided. The cooling pipes pass through the pressing plate and the placing table and are evenly arranged in the pressing plate and the placing table, so that the device can quickly cool the mold after casting, and the coolant can be kept at a low temperature all the time and will not increase the temperature due to the high temperature of the model.

[0004] However, when the above solution is used, it can only demould after cooling the exhaust pipe casting, and the casting efficiency is slow. Moreover, when the above solution is used for casting, the molten liquid is injected through a single injection port, and the molten liquid is easy to solidify during the flowing process, resulting in easy loss of the edges and corners, affecting the qualified rate of the finished product. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a casting device for an engine exhaust pipe, and the technical problem to be solved is: waiting for demoulding after cooling affects the casting efficiency, and a single injection port easily causes the loss of the edges and corners of the exhaust pipe, affecting the qualified rate of the finished product.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a casting device for an engine exhaust pipe, including a base fixed on an operating table:

[0007] An upper mold is movably provided at the upper end of the base, two moving rods are fixedly provided at the upper end of the upper mold, and the upper ends of the moving rods are fixedly connected to the bottom end of the punch head of the punching machine;

[0008] The upper end of the base is provided with a mold disassembly device capable of shifting the position of the engine exhaust pipe after casting, and is used to shift the engine exhaust pipe after casting to prepare for the next casting;

[0009] The mold disassembly device comprises a cooling groove, which is arranged at the upper end of the base, and has limiting grooves on both sides of the cooling groove;

[0010] The upper end of the upper mold is provided with a multi-hole injection device capable of injecting molten metal, which is used for injecting molten metal from multiple different positions.

[0011] In a preferred embodiment, a lower mold is movably provided inside the cooling tank, and heat-insulating support plates are fixedly provided on both sides of the lower mold.

[0012] In a preferred embodiment, the thermal insulation support plate is located inside the limiting groove, and the outermost end of the thermal insulation support plate protrudes out of the limiting groove.

[0013] In a preferred embodiment, the multi-hole injection device includes a plurality of injection holes, which are respectively opened on the inner side of the upper mold, the upper ends of the injection holes are connected to injection tubes, and the lower ends of the injection tubes are fixedly connected to the upper end of the upper mold.

[0014] In a preferred embodiment, the upper ends of the plurality of injection tubes are connected to the same diverter, and a connecting tube is fixedly provided at the input end of the diverter.

[0015] In a preferred embodiment, a heat-resistant hose is fixedly provided on the upper end of the connecting pipe, and the upper end of the heat-resistant hose is fixedly connected to the output end of the solution output device.

[0016] In a preferred embodiment, a heat exchange tube is fixedly provided on the inner side of the base, a liquid inlet pipe is fixedly provided at one end of the heat exchange tube, and a liquid discharge pipe is fixedly provided at the other end of the heat exchange tube, and the liquid inlet pipe and the liquid discharge pipe are respectively connected to the output end and the input end of the liquid cooling device.

[0017] Technical effects and advantages of the utility model:

[0018] 1. The utility model places the lower mold into the cooling tank, and the cooling tank cools the lower mold, so that the engine exhaust pipe at the upper end of the lower mold is cooled and solidified. After solidification, the upper mold is lifted by the moving rod, and the heat insulation support plate is dragged to make the lower mold separate from the cooling tank, so that the next lower mold can be replaced for re-casting, which can improve work efficiency, reduce cooling waiting time, and improve production efficiency, and there is no need to wait for the engine exhaust pipe to completely cool down;

[0019] 2. The utility model is provided with a plurality of injection holes in the upper mold, so that the molten liquid can be injected into different positions. After the material is melted by the melting equipment, it is discharged into the heat-resistant hose and the connecting pipe, and the molten liquid is shunted into the injection pipe by the shunt, so as to inject the molten liquid between the upper mold and the lower mold, reducing the damage of the product as a whole and avoiding the problem of the lack of corners of the engine exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is an exploded view of the utility model.

[0022] Figure 3 It is a schematic diagram of the side sectional structure of the base of the utility model.

[0023] Figure 4 It is a schematic diagram of the structure of the mold disassembly device of the utility model.

[0024] Figure 5 It is a bottom view of the upper mold of the utility model.

[0025] Figure 6 It is a schematic diagram of the structure of the porous injection device of the utility model.

[0026] The reference numerals are: 1, base; 2, mold disassembly device; 3, porous injection device; 4, upper mold; 5, liquid inlet pipe; 6, liquid discharge pipe; 7, moving rod; 8, heat exchange pipe; 21, cooling tank; 22, limiting groove; 23, lower mold; 24, heat insulation support plate; 31, injection hole; 32, injection pipe; 33, shunt; 34, connecting pipe; 35, heat-resistant hose. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art in the field of exhaust pipe casting of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0028] Such as Figure 1 , 2As shown in FIGS. 2 and 3, the present utility model provides a casting device for an engine exhaust pipe, including a base 1 fixed on an operating table. An upper mold 4 is movably arranged at the upper end of the base 1. Two moving rods 7 are fixedly arranged at the upper end of the upper mold 4, and the upper ends of the moving rods 7 are fixedly connected to the bottom end of the punching head of a punching machine. A heat exchange tube 8 is fixedly arranged inside the base 1. One end of the heat exchange tube 8 is fixedly provided with a liquid inlet pipe 5, and the other end of the heat exchange tube 8 is fixedly provided with a liquid discharge pipe 6. The liquid inlet pipe 5 and the liquid discharge pipe 6 are respectively connected to the output end and the input end of a liquid cooling device;

[0029] In addition, it is worth noting that the liquid cooling device of the present utility model is a water-cooled water chiller, which is used to extract the coolant in the liquid discharge pipe 6 and cool it. The cooled coolant can flow into the heat exchange tube 8 from the liquid inlet pipe 5 to achieve the effect of circulating cooling. Among them, the heat exchange tube 8 can conduct heat to cool the cooling tank 21. The structures of the liquid cooling device all belong to mature prior arts, so they will not be further described in the present utility model.

[0030] In order to reduce the waiting cooling time and improve the production efficiency, a mold disassembly device 2 for transferring the cast engine exhaust pipe is arranged at the upper end of the base 1, which is used to transfer the cast engine exhaust pipe and prepare for the next casting;

[0031] As Figure 4 shown, the mold disassembly device 2 includes a cooling tank 21 opened at the upper end of the base 1. Limiting grooves 22 are opened on both sides of the cooling tank 21. A lower mold 23 is movably arranged inside the cooling tank 21. Heat insulation support plates 24 are respectively fixedly arranged on both sides of the lower mold 23. The heat insulation support plates 24 are located inside the limiting grooves 22, and the outermost ends of the heat insulation support plates 24 protrude from the limiting grooves 22. By placing the lower mold 23 into the cooling tank 21, the cooling tank 21 cools and lowers the temperature of the lower mold 23, so as to cool and solidify the engine exhaust pipe at the upper end of the lower mold 23. After solidification, the upper mold 4 is lifted by the moving rod 7, and the heat insulation support plate 24 is dragged to separate the lower mold from the cooling tank 21, so that the next lower mold 23 can be replaced for casting again, which can improve the working efficiency, reduce the cooling waiting time, improve the production efficiency, and does not require waiting for the engine exhaust pipe to cool completely.

[0032] Furthermore, in order to reduce product damage and avoid the problem of missing corners of the engine exhaust pipe, a porous injection device 3 for injecting molten liquid is arranged at the upper end of the upper mold 4, which is used to inject molten liquid from multiple different positions;

[0033] As Figure 5 and 6As shown in the figure, the porous injection device 3 includes a plurality of injection holes 31, which are respectively opened on the inner side of the upper mold 4. The upper ends of the injection holes 31 are communicated with injection pipes 32, and the lower ends of the injection pipes 32 are fixedly connected to the upper end of the upper mold 4. The upper ends of the plurality of injection pipes 32 are communicated with the same diverter 33. A connecting pipe 34 is fixedly provided at the input end of the diverter 33, and a heat-resistant hose 35 is fixedly provided at the upper end of the connecting pipe 34. The upper end of the heat-resistant hose 35 is fixedly connected to the output end of the solution output device. Since a plurality of injection holes 31 are opened in the upper mold 4, the molten liquid can be injected at different positions. After the material is melted by the melting device, it is discharged into the heat-resistant hose 35 and the connecting pipe 34, and the molten liquid is diverted into the injection pipes 32 by the diverter 33, so as to inject the molten liquid between the upper mold 4 and the lower mold 23, reducing the damage of the product as a whole and avoiding the problem of the lack of corners of the engine exhaust pipe.

[0034] The working principle is as follows: When the present invention is in use, the upper mold 4 is pressed down by the punching machine driving the moving rod 7. The melting device melts the material and injects the molten liquid at different positions through the porous injection device 3, and then the cooling liquid flowing in the heat exchange pipe 8 cools it. Since the liquid inlet pipe 5 and the liquid discharge pipe 6 are respectively connected to the output end and the input end of the liquid cooling device, the effect of cooling the cooling tank 21 can be achieved. After the engine exhaust pipe is cast and formed, the lower mold 23 and the engine exhaust pipe can be transferred by the mold disassembly device 2, so that a new lower mold 23 can be quickly placed in the cooling tank 21 for the next casting. As a whole, the production efficiency of the present invention can be improved, and the qualification rate of the manufactured engine exhaust pipe is also improved, avoiding the problem of the lack of corners due to the solidification of the molten liquid during the casting process.

[0035] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An engine exhaust pipe casting device, comprising a base (1) fixed on an operating table, characterized in that: An upper mold (4) is movably provided at the upper end of the base (1), two moving rods (7) are fixedly provided at the upper end of the upper mold (4), and the upper ends of the moving rods (7) are fixedly connected to the bottom end of the punch head of the punching machine; The upper end of the base (1) is provided with a mold disassembly device (2) capable of shifting the position of the exhaust pipe of the engine after casting, and is used for shifting the exhaust of the engine after casting; The mold disassembly device (2) comprises a cooling groove (21), the cooling groove (21) is arranged at the upper end of the base (1), and limiting grooves (22) are arranged on both sides of the cooling groove (21); The upper end of the upper mold (4) is provided with a multi-hole injection device (3) capable of injecting molten liquid, and is used for injecting molten liquid from multiple different positions.

2. The engine exhaust pipe casting device according to claim 1, characterized in that: A lower mold (23) is movably disposed inside the cooling groove (21), and heat insulation support plates (24) are fixedly disposed on both sides of the lower mold (23).

3. The engine exhaust pipe casting device according to claim 2, characterized in that: The heat-insulating support plate (24) is located inside the limiting groove (22), and the outermost end of the heat-insulating support plate (24) protrudes out of the limiting groove (22).

4. The engine exhaust pipe casting device according to claim 1, characterized in that: The multi-hole injection device (3) comprises a plurality of injection holes (31), wherein the plurality of injection holes (31) are respectively opened on the inner side of the upper mold (4), the upper ends of the injection holes (31) are connected to injection tubes (32), and the lower ends of the injection tubes (32) are fixedly connected to the upper end of the upper mold (4).

5. The engine exhaust pipe casting device according to claim 4, characterized in that: The upper ends of the plurality of injection tubes (32) are connected to a same flow divider (33), and a connecting tube (34) is fixedly provided at the input end of the flow divider (33).

6. The engine exhaust pipe casting device according to claim 5, characterized in that: A heat-resistant hose (35) is fixedly provided on the upper end of the connecting pipe (34), and the upper end of the heat-resistant hose (35) is fixedly connected to the output end of the solution output device.

7. The engine exhaust pipe casting device according to claim 1, characterized in that: A heat exchange tube (8) is fixedly provided on the inner side of the base (1); a liquid inlet tube (5) is fixedly provided on one end of the heat exchange tube (8); a liquid discharge tube (6) is fixedly provided on the other end of the heat exchange tube (8); the liquid inlet tube (5) and the liquid discharge tube (6) are respectively connected to the output end and the input end of the liquid cooling device.

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