Exhaust device for casting processing

Abstract

The utility model discloses an exhaust device for casting processing, which comprises a connecting block and a casting forming mould, the connecting block is mounted and connected on the upper side of the right end of the casting forming mould, in the utility model, the exhaust component and the flow guide component are matched for use, so that the effect of controllable negative pressure can be realized, and during the use, the flow guide component is not easy to fall off. During use, dry compressed air is injected into a casting forming mold through the air supply port, at the moment, the air enters a space above the alloy liquid level in the heat preservation furnace to force alloy liquid to rise to the cavity along the liquid rising pipe until the cavity is filled, and during the period, the air in the cavity is discharged out of the air supply port. Under the action of the negative pressure generator, the rusted steel flow guide pipe can actively extract gas in the cavity and exhaust the gas from the exhaust port, so that the defect of air holes in casting is effectively reduced, the product quality is improved, and the negative pressure generator is adopted as a negative pressure element, so that the effect of controlling negative pressure can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of casting processing, in particular to an exhaust device for casting processing. Background Art

[0002] In order to improve the yield rate in the casting process, improvements are usually considered in terms of casting alloys, pressure, coatings, and riser tubes. Some product structures and modeling restrictions force the gas in the cavity to not be discharged effectively, completely and timely during the casting process, and it is retained in the cavity to form pores in the casting. Therefore, a device that can discharge the gas in the cavity is needed.

[0003] In the existing casting process, the gas in the cavity is discharged by adding a vent plug to increase the exhaust of the mold cavity. However, ordinary vent plugs are often clogged with aluminum during use, resulting in the vent plug being unable to achieve the exhaust effect. Utility Model Content

[0004] The purpose of the utility model is to provide an exhaust device for casting processing, so as to solve the problem that in the existing casting processing process proposed in the above background technology, the gas in the cavity is discharged, and the exhaust of the mold cavity is usually increased by adding an exhaust plug, while the ordinary exhaust plug is often blocked by aluminum during use, resulting in the exhaust plug being unable to achieve the exhaust effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an exhaust device for casting processing, comprising a connecting block and a casting molding mold, wherein the connecting block is installed and connected to the upper right end of the casting molding mold, an exhaust plug is arranged in a row at the upper end of the connecting block, a guide assembly is arranged at the inner front end of the exhaust plug, an exhaust assembly is arranged at the terminal end of the guide assembly, and a fixing assembly is arranged at the bottom end of the exhaust assembly.

[0006] Among them, the exhaust component includes an air supply port, a vacuum connecting pipe, a negative pressure generator and an exhaust port. A vacuum connecting pipe is provided at the upper end of the negative pressure generator, an air supply port is provided at the front end of the negative pressure generator, and an exhaust port is provided at the rear end of the negative pressure generator. The negative pressure generator is connected to the guide component through the vacuum connecting pipe.

[0007] Wherein, the flow guide assembly includes a stainless steel flow guide pipe and a threaded short pipe, a threaded short pipe is arranged at the end of the stainless steel flow guide pipe, and the stainless steel flow guide pipe is connected to the exhaust plug.

[0008] Among them, the fixing component includes an anti-slip rubber pad, a fixing bolt, a fixing groove and a stable base plate. The fixing bolts are arranged around the upper end of the stable base plate, a fixing groove is arranged in the middle of the upper end of the stable base plate, an anti-slip rubber pad is arranged on the bottom end surface of the stable base plate, and the stable base plate is connected to the external fixing part through the fixing bolts.

[0009] The exhaust component and the fixed component are connected and installed by means of a sleeve connection, and the exhaust component is connected to the inner upper end position of the fixed component.

[0010] The flow guide component and the exhaust component are connected and installed by means of threaded rotation, and the exhaust component is connected to the end of the flow guide component.

[0011] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the controllable negative pressure can be achieved by using the exhaust component and the guide component in combination, and when in use, the gas in the cavity can be guided to the outside of the cavity, effectively reducing the pore defects of casting. When installing the exhaust component, first, the negative pressure generator sleeve is placed in the fixed component, and the fixed component is connected to the external fixing part, so that it is not easy to slide and shift during use. Further, the vacuum connecting pipe at the upper end of the negative pressure generator is connected to the guide component. When in use, dry compressed air is injected into the casting mold through the air supply port. At this time, the air enters the space above the alloy liquid level in the insulation furnace, forcing the alloy liquid to rise to the cavity along the riser until the cavity is filled. During this period, under the action of the negative pressure generator, the rusty steel guide pipe actively extracts the gas in the cavity and discharges it from the exhaust port. This use effectively reduces the pore defects of casting and improves the quality of the product. The negative pressure generator is used as the negative pressure element to achieve the controllable negative pressure.

[0013] 2. In the utility model, the exhaust assembly can be fixed to a designated place by fixing the assembly structure when in use, so that it is more stable and not easy to slide and shift when in use. When using the fixed assembly, first, through the fixing groove in the middle of the upper end of the stable bottom plate, the exhaust assembly can be conveniently inserted into it, and the fixing bolts around the upper end of the stable bottom plate are further rotated to make it rotatably connected to the external fixing part. In this way, the exhaust assembly can be fixed to a designated position, and it is not easy to slide and shift when in use. The anti-slip rubber pad on the bottom end face of the stable bottom plate makes it more tightly and securely connected to the fixing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a casting exhaust device of the utility model;

[0015] Figure 2This is a schematic diagram of the exhaust component structure of a casting exhaust device of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of a guide assembly of a casting exhaust device of the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the structure of a fixing component of a casting exhaust device.

[0018] In the figure: 1. connecting block; 2. exhaust plug; 3. casting mold; 4. guide assembly; 41. stainless steel guide pipe; 42. threaded short pipe; 5. exhaust assembly; 51. air supply port; 52. vacuum connecting pipe; 53. negative pressure generator; 54. exhaust port; 6. fixing assembly; 61. anti-slip rubber pad; 62. fixing bolt; 63. fixing groove; 64. stable bottom plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0020] Embodiment 1

[0021] Reference Figure 1 and Figure 2, an exhaust device for casting processing, comprising a connecting block 1 and a casting molding mold 3, the connecting block 1 is installed and connected to the upper right end of the casting molding mold 3, an exhaust plug 2 is arranged in a row at the upper end of the connecting block 1, a guide component 4 is arranged at the inner front end of the exhaust plug 2, an exhaust component 5 is arranged at the end of the guide component 4, and a fixing component 6 is arranged at the bottom of the exhaust component 5. Before use, the guide component 4 is welded with the exhaust plug 2, and then the end of the guide component 4 is connected to the exhaust component 5, and then the fixing component 6 is used to fix the exhaust component 5 with the external fixing part so that it will not slide and shift during use. When in use, dry compressed air is injected into the casting molding mold 3. At this time, the air enters the space above the alloy liquid level in the insulation furnace, forcing the alloy liquid to rise to the cavity along the riser, so that the alloy liquid enters the casting In the cavity in the molding mold 3, until the cavity is filled, during which time the negative pressure generator 53 actively discharges the gas in the cavity, which can effectively reduce the pore defects of the casting. After the molten metal fills the casting mold, it is immediately pressurized to make the alloy liquid in the cavity crystallize and solidify under a certain pressure. After further completion, the pressure on the liquid surface in the insulation furnace is removed, so that the alloy liquid that has not yet solidified in the riser and the pouring gate falls back into the insulation furnace by its own weight. After the pressure is relieved, in order to make the casting obtain a certain solidification strength and prevent deformation and damage during mold opening and demolding, the casting needs to be cooled down for a long time. In this way, the negative pressure generator 53 is used as a negative pressure element to realize the controllable negative pressure, and is used in conjunction with the stainless steel guide tube 41, so that during use, the gas in the cavity can be diverted to the outside of the cavity, effectively reducing the pore defects of the casting.

[0022] In the utility model, the exhaust component 5 includes an air supply port 51, a vacuum connecting pipe 52, a negative pressure generator 53 and an exhaust port 54. The upper end of the negative pressure generator 53 is provided with a vacuum connecting pipe 52, the front end of the negative pressure generator 53 is provided with an air supply port 51, and the rear end of the negative pressure generator 53 is provided with an exhaust port 54. The negative pressure generator 53 is connected to the guide component 4 through the vacuum connecting pipe 52. When installing the exhaust component 5, first, the negative pressure generator 53 is placed in the fixing component 6, and the fixing component 6 is connected to the external fixing part so that it is not easy to slide and shift during use, and further the negative pressure generator 53 is connected to the guide component 4. The vacuum connecting pipe 52 at the upper end of the negative pressure generator 53 is connected to the guide assembly 4. When in use, dry compressed air is injected into the casting mold 3 through the air supply port 51. At this time, the air enters the space above the alloy liquid level in the insulation furnace, forcing the alloy liquid to rise to the cavity along the riser until the cavity is filled. During this period, under the action of the negative pressure generator 53, the stainless steel guide pipe 41 actively extracts the gas in the cavity and discharges it from the exhaust port 54. This use effectively reduces the porosity defects of casting and improves the quality of the product. The negative pressure generator 53 is used as a negative pressure element to achieve the controllable negative pressure effect.

[0023] Working principle: Before use, use the guide component 4 to weld with the exhaust plug 2, then connect the end of the guide component 4 with the exhaust component 5, and then use the fixing component 6 to fix the exhaust component 5 with the external fixing part so that it will not slide or shift during use. When in use, dry compressed air is injected into the casting mold 3. At this time, the air enters the space above the alloy liquid level in the insulation furnace, forcing the alloy liquid to rise to the cavity along the riser pipe, so that the alloy liquid enters the cavity in the casting mold 3 until the cavity is filled. During this period, under the action of the negative pressure generator 53, the gas in the cavity is actively discharged, which can effectively reduce the pores in the casting. Defects, after the molten metal fills the casting mold, it is immediately pressurized to make the alloy liquid in the cavity crystallize and solidify under a certain pressure. After further completion, the pressure on the liquid surface in the insulation furnace is released, so that the alloy liquid that has not yet solidified in the riser and the pouring gate falls back into the insulation furnace by its own weight. After the pressure is released, in order to make the casting obtain a certain solidification strength and prevent deformation and damage during mold opening and demolding, the casting needs to be cooled down for a long time. In this way, the negative pressure generator 53 is used as a negative pressure element to achieve the effect of controllable negative pressure, and it is used in conjunction with the stainless steel guide tube 41 so that during use, the gas in the cavity can be diverted to the outside of the cavity, thereby effectively reducing the porosity defects of the casting.

[0024] Embodiment 2

[0025] Reference Figure 1 and Figure 3 , a casting exhaust device, compared with the second embodiment, the guide component 4 and the exhaust component 5 are connected and installed by means of threaded rotation, and the exhaust component 5 is connected to the end of the guide component 4, the guide component 4 includes a stainless steel guide pipe 41 and a threaded short pipe 42, the end of the stainless steel guide pipe 41 is provided with a threaded short pipe 42, and the stainless steel guide pipe 41 is connected to the exhaust plug 2.

[0026] Working principle: When installing the guide component 4, first, weld the front end of the stainless steel guide tube 41 to the exhaust plug 2, and use welding to connect and install it, so that it is more secure and not easy to fall off during use. Then, the threaded short tube 42 at the end of the stainless steel guide tube 41 is threadedly connected to the exhaust component 5, and the threaded rotation is used to connect and install it, so that it is convenient for disassembly and assembly, and easy to put away. When in use, the exhaust component 5 is driven to make the stainless steel guide tube 41 can guide the gas in the cavity to the outside of the cavity, effectively reducing the casting porosity defects.

[0027] Embodiment 3

[0028] Reference Figure 1 and Figure 4, a casting exhaust device, compared with the third embodiment, the exhaust component 5 and the fixing component 6 are connected and installed by means of sleeve connection, and the exhaust component 5 is connected to the inner upper end position of the fixing component 6, and the fixing component 6 includes a non-slip rubber pad 61, a fixing bolt 62, a fixing groove 63 and a stable bottom plate 64, and the fixing bolts 62 are arranged around the upper end of the stable bottom plate 64, and a fixing groove 63 is arranged in the middle of the upper end of the stable bottom plate 64. The bottom end surface of the stable bottom plate 64 is provided with a non-slip rubber pad 61, and the stable bottom plate 64 is connected to the external fixing part through the fixing bolt 62.

[0029] Working principle: When using the fixing component 6, first, through the fixing groove 63 in the middle of the upper end of the stable bottom plate 64, the exhaust component 5 is conveniently inserted into it, and the fixing bolts 62 around the upper end of the stable bottom plate 64 are further rotated to make it rotatably connected to the external fixing part. In this way, the exhaust component 5 can be fixed to the specified position, and it is not easy to slide and shift during use. The anti-slip rubber pad 61 on the bottom end face of the stable bottom plate 64 makes it more tightly and securely connected to the fixing part.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A casting exhaust device, comprising a connecting block (1) and a casting mold (3), Features: The connection block (1) is installed and connected to the upper right side of the casting mold (3); a row of exhaust plugs (2) are arranged at the upper end of the connection block (1); a flow guide assembly (4) is arranged at the inner front end of the exhaust plug (2); an exhaust assembly (5) is arranged at the end of the flow guide assembly (4); and a fixing assembly (6) is arranged at the bottom end of the exhaust assembly (5).

2. An exhaust device for casting processing according to claim 1, Features: The exhaust assembly (5) comprises an air supply port (51), a vacuum connecting pipe (52), a negative pressure generator (53) and an exhaust port (54); the upper end of the negative pressure generator (53) is provided with a vacuum connecting pipe (52); the front end of the negative pressure generator (53) is provided with an air supply port (51); the rear end of the negative pressure generator (53) is provided with an exhaust port (54); the negative pressure generator (53) is connected to the flow guide assembly (4) via the vacuum connecting pipe (52).

3. An exhaust device for casting processing according to claim 1, Features: The flow guide assembly (4) comprises a stainless steel flow guide tube (41) and a threaded short tube (42); a threaded short tube (42) is provided at the end of the stainless steel flow guide tube (41); and the stainless steel flow guide tube (41) is connected to the exhaust plug (2).

4. An exhaust device for casting processing according to claim 1, Features: The fixing assembly (6) comprises an anti-skid rubber pad (61), a fixing bolt (62), a fixing groove (63) and a stable bottom plate (64); the fixing bolts (62) are arranged around the upper end of the stable bottom plate (64); a fixing groove (63) is arranged in the middle of the upper end of the stable bottom plate (64); an anti-skid rubber pad (61) is arranged on the bottom end surface of the stable bottom plate (64); and the stable bottom plate (64) is connected to an external fixing member via the fixing bolts (62).

5. The exhaust device for casting processing according to claim 1, Features: The exhaust component (5) and the fixed component (6) are connected and installed in a sleeve-type manner, and the exhaust component (5) is connected to the inner upper end position of the fixed component (6).

6. An exhaust device for casting processing according to claim 1, Features: The flow guide component (4) and the exhaust component (5) are connected and installed by means of threaded rotation, and the exhaust component (5) is connected to the end of the flow guide component (4).

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