Low pressure die casting mold vent plug

Abstract

This utility model relates to the field of low-pressure casting technology and discloses a low-pressure casting mold exhaust plug; it includes an exhaust pipe and an outlet pipe, the outlet pipe being connected to one end of the exhaust pipe, a support block being fixed to the outside of the outlet pipe, a guide component being provided inside the support block, and a connecting column being provided to the outside of the guide component; the beneficial effects of this utility model are as follows: gas flows into the exhaust pipe through a set of exhaust plates, and the gas is guided to flow in a spiral shape by a spiral guide plate, so that the airflow flows smoothly and orderly through another set of exhaust plates into the outlet pipe and is discharged, realizing the effect of spiral guiding exhaust; by rotating the guide rod, the guide ring is driven to rotate along the support block, the guide ring drives the connecting column to slide and rotate along the connecting plate, the connecting plate transmits power to the connecting rod, and the connecting rod drives the valve leaf to open and close in the outlet pipe, realizing the effect of adjusting the exhaust area.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure casting technology, specifically to a low-pressure casting mold vent plug. Background Technology

[0002] Low-pressure casting molds are the core equipment of the low-pressure casting process. They are composed of key parts such as fixed molds, moving molds, and cores. After the fixed molds and moving molds are closed, they form a closed cavity that matches the shape of the casting. The core is used to shape the complex internal structure of the casting. The mold is made of high-quality steel and has high strength, good heat resistance and thermal fatigue resistance to withstand repeated scouring and thermal expansion and contraction of high-temperature molten metal.

[0003] In low-pressure casting, the molten metal filling process compresses the air inside the mold cavity. If the gas cannot escape, it will form defects such as porosity and looseness in the casting, affecting the quality. The vent plug provides a gas venting channel, allowing the gas inside the mold cavity to escape smoothly, ensuring that the molten metal is fully filled, and improving the density and quality of the casting. Existing low-pressure casting mold vent plugs usually adopt a straight hole structure, where the gas is directly discharged from the mold cavity through a simple straight hole. They lack a spiral flow guiding venting structure, resulting in a unidirectional and turbulent gas discharge that easily generates turbulence, making it easy for impurities to mix into the molten metal, increasing the risk of casting defects. They also lack the function of adjusting the venting area, and the venting volume is fixed. When facing different process requirements, such as changes in the type of molten metal and the filling speed, they cannot be flexibly adjusted, making it difficult to ensure stable air pressure inside the mold cavity. This is not conducive to the smooth filling and solidification of the molten metal, ultimately affecting the quality of the casting and production efficiency.

[0004] Therefore, it is necessary to provide a new low-pressure casting mold vent plug to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a vent plug for low-pressure casting molds to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-pressure casting mold exhaust plug, comprising an exhaust pipe and an outlet pipe, wherein the outlet pipe is connected to one end of the exhaust pipe, a support block is fixed to the outside of the outlet pipe, a guide component is provided inside the support block, and a connecting post is provided on the outside of the guide component. A connecting component is disposed on the outside of the connecting post, and a valve leaf for adjusting the outflow of air is disposed on the outside of the connecting component; An exhaust assembly is disposed inside an exhaust pipe, one end of which is connected to a connecting pipe.

[0007] Preferably, the guide assembly includes a guide ring slidably connected to the inner wall of the support block, a guide rod is fixed to the outer side of the guide ring, and the outer side of the guide ring is fixed to one end of the connecting column.

[0008] Preferably, the connecting assembly includes a connecting plate slidably connected to the outside of the connecting column, a connecting rod fixed to the inner wall of the connecting plate, and the outer side of the connecting rod rotatably connected to the inner wall of the air outlet pipe, and the outer side of the connecting rod fixed to the inner wall of the valve leaf.

[0009] Preferably, the exhaust assembly includes two sets of exhaust plates fixed to the inner wall of the exhaust pipe, and a spiral guide plate is fixed between the two sets of exhaust plates.

[0010] Preferably, the inner wall of the connecting pipe is provided with a slot, and a locking block is engaged with the inner wall of the slot.

[0011] Preferably, a filter tube is fixed to one side of the card block, and one end of the filter tube is connected to one end of the exhaust pipe, and a metal wire mesh is clamped to the inner wall of the filter tube.

[0012] Preferably, the inner wall of the filter tube is respectively fitted with a ceramic fiber mesh and an activated carbon fiber mesh.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: Gas flows into the exhaust pipe through a set of exhaust plates. The gas is guided into a spiral flow by a spiral guide plate, so that the airflow flows smoothly and orderly through another set of exhaust plates into the exhaust pipe and is discharged, achieving the effect of spiral flow exhaust. By rotating the guide rod, the guide ring is driven to rotate along the support block. The guide ring drives the connecting column to slide and rotate along the connecting plate. The connecting plate transmits power to the connecting rod, and the connecting rod drives the valve leaf to open and close in the exhaust pipe, thereby achieving the effect of adjusting the exhaust area. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the low-pressure casting mold vent plug provided by this utility model; Figure 2 This is a schematic diagram of the structure of the guide component and the connecting component in this utility model; Figure 3 This is a schematic diagram of the exhaust assembly in this utility model; Figure 4 This is a schematic diagram of the card slot and card block in this utility model; Figure 5 This is a schematic diagram of the filter tube in this utility model.

[0015] In the diagram: 1. Exhaust pipe; 2. Outlet pipe; 3. Support block; 4. Guide assembly; 41. Guide ring; 42. Guide rod; 5. Connecting column; 6. Connecting assembly; 61. Connecting plate; 62. Connecting rod; 7. Valve leaf; 8. Exhaust assembly; 81. Exhaust plate; 82. Spiral guide plate; 9. Connecting pipe; 10. Slot; 11. Locking block; 12. Filter pipe; 13. Metal wire mesh; 14. Ceramic fiber mesh; 15. Activated carbon fiber mesh. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 As shown, a low-pressure casting mold vent plug includes a vent pipe 1 and an outlet pipe 2. The outlet pipe 2 is connected to one end of the vent pipe 1. A support block 3 is fixed to the outside of the outlet pipe 2. A guide component 4 is provided inside the support block 3. A connecting column 5 is provided on the outside of the guide component 4. The gas in the mold cavity is collected through the vent pipe 1 and guided to the outlet pipe 2, which realizes orderly venting and avoids the disordered gas discharge in the traditional venting method, which leads to quality problems such as porosity and slag inclusion in the casting caused by poor venting. The opening degree of the venting channel can be adjusted by the guide component 4 driving the connecting column 5 to control the venting volume. It should be noted that: multiple limiting grooves are provided on the outer side of the air outlet pipe 2. The limiting rod is inserted into the limiting groove of the air outlet pipe 2 through the inner wall of the guide rod 42 and the limiting rod 42, so as to achieve the positioning and stable connection between the air outlet pipe 2 and the guide rod 42. When the guide rod 42 is rotated to make the guide ring 41 rotate, since the guide ring 41 is slidably connected to the support block 3 and the support block 3 is also fixed to the air outlet pipe 2, the support block 3 plays a guiding role, restricting the guide ring 41 to rotate only along the axial center line of the air outlet pipe 2, so that the guide ring 41 rotates under the drive of the guide rod 42.

[0018] The connecting component 6 is located on the outside of the connecting column 5. A valve leaf 7 for adjusting the airflow is provided on the outside of the connecting component 6. The connecting column 5 drives the connecting component 6 to rotate, thereby causing the valve leaf 7 to open and close in the air outlet pipe 2. This allows for the regulation of the exhaust area of ​​the air outlet pipe 2, enabling flexible control of the exhaust volume according to the needs of different stages of low-pressure casting. The exhaust assembly 8 is located inside the exhaust pipe 1. One end of the exhaust pipe 1 is connected to the connecting pipe 9. The gas generated by low-pressure casting flows into the exhaust pipe 1 through the connecting pipe 9. The exhaust assembly 8 guides the gas to flow in a spiral motion, allowing the airflow to enter the exhaust pipe 2 smoothly and orderly for discharge. This achieves efficient and stable exhaust, avoids disordered gas discharge, and prevents impurities from mixing into the molten metal, which could lead to defects such as porosity and slag inclusions in the casting, thus ensuring the quality of the casting.

[0019] It should be noted that one end of the connecting pipe 9 is connected to the installation pipe, which is threadedly connected to the venting groove inside the mold, thus achieving a stable and sealed connection of the device and ensuring that the gas is smoothly introduced into the connecting pipe 9.

[0020] The guide assembly 4 includes a guide ring 41 that is slidably connected to the inner wall of the support block 3. A guide rod 42 is fixed to the outer side of the guide ring 41, and the outer side of the guide ring 41 is fixed to one end of the connecting column 5. By rotating the guide rod 42, the guide ring 41 is driven to rotate around the support block 3. The guide ring 41 drives the connecting column 5 to rotate, thereby realizing the control of the opening and closing angle of the valve leaf 7 in the air outlet pipe 2. This avoids the inaccurate control of exhaust volume caused by transmission gaps or offsets in traditional structures, and ensures the stability of air pressure during the casting process.

[0021] The connecting assembly 6 includes a connecting plate 61 slidably connected to the outside of the connecting column 5. A connecting rod 62 is fixed to the inner wall of the connecting plate 61, and the outer side of the connecting rod 62 is rotatably connected to the inner wall of the exhaust pipe 2. The outer side of the connecting rod 62 is also fixed to the inner wall of the valve leaf 7. In terms of adjusting the exhaust area, the guide ring 41 is rotated around the support block 3 by rotating the guide rod 42. The guide ring 41 drives the connecting column 5 to rotate and slide along the connecting plate 61. The connecting plate 61 transmits power to the connecting rod 62. The connecting rod 62 drives the valve leaf 7 to open and close in the exhaust pipe 2, thereby achieving the effect of adjusting the exhaust area. When the guide rod 42 is adjusted to the designated position, the limiting rod passes through the inner wall of the guide rod 42 and is simultaneously inserted into the limiting groove of the exhaust pipe 2, thereby achieving the positioning and stable connection between the exhaust pipe 2 and the guide rod 42.

[0022] The exhaust assembly 8 includes two sets of exhaust plates 81 fixed to the inner wall of the exhaust pipe 1, and a spiral guide plate 82 fixed between the two sets of exhaust plates 81. In terms of exhaust, the gas generated by low-pressure casting flows into the connecting pipe 9, flows into the exhaust pipe 1 through one set of exhaust plates 81, and is guided by the spiral guide plate 82 to flow in a spiral shape, so that the airflow flows smoothly and orderly through the other set of exhaust plates 81 into the exhaust pipe 2 and is discharged, thus achieving the effect of spiral guide exhaust.

[0023] The inner wall of the connecting pipe 9 has a slot 10, and a locking block 11 is engaged with the inner wall of the slot 10. A filter pipe 12 is fixed to one side of the locking block 11, and one end of the filter pipe 12 is connected to one end of the exhaust pipe 1. A metal wire mesh 13 is engaged with the inner wall of the filter pipe 12, and a ceramic fiber mesh 14 and an activated carbon fiber mesh 15 are also engaged with the inner wall of the filter pipe 12. In terms of filtration, when gas flows into the filter pipe 12 through the connecting pipe 9, the metal wire mesh 13, with its fine pores, first intercepts larger particulate impurities, achieving preliminary mechanical filtration. The ceramic fiber mesh 14, with its three-dimensional mesh structure formed by high-temperature sintering, further adsorbs micron-sized particles and some oil mist, improving the filtration efficiency. The activated carbon fiber mesh 15, through its porous structure and strong adsorption, efficiently captures odor molecules, volatile organic compounds, and other harmful substances in the gas, achieving graded purification of the casting gas. When replacing the metal wire mesh 13, ceramic fiber mesh 14, and activated carbon fiber mesh 15, the filter tube 12 is moved by pulling the exhaust pipe 1, causing the locking block 11 to separate from the connecting pipe 9 through the locking groove 10, thus achieving quick unlocking and disassembly of the filter tube 12 and the connecting pipe 9. Subsequently, the metal wire mesh 13, ceramic fiber mesh 14, and activated carbon fiber mesh 15 are pulled out from the filter tube 12 in sequence for replacement. The entire process can be completed without the aid of tools, greatly shortening the maintenance time.

[0024] It should be noted that: the metal wire mesh 13 is made of stainless steel and uses its fine pores to intercept large particles of impurities; the ceramic fiber mesh 14 is made of inorganic fibers such as alumina and silicon dioxide sintered together and uses its three-dimensional mesh structure to adsorb micron-sized particles; and the activated carbon fiber mesh 15 is made of carbon-containing organic fibers activated at high temperature and uses its porous structure and surface functional groups to capture organic matter and odor molecules. The three work together to achieve graded filtration, which not only avoids large particles clogging subsequent filter layers but also improves the removal efficiency of small pollutants and ensures the gas purification effect.

[0025] Working Principle: When using this device, firstly, move it to the exhaust groove inside the mold. The device is fixed by rotating the mounting pipe of connecting pipe 9 along the thread of the exhaust groove. When the gas generated during low-pressure casting flows into the filter pipe 12 through connecting pipe 9, the metal wire mesh 13, with its fine pores, first intercepts larger particles, achieving preliminary mechanical filtration. The ceramic fiber mesh 14, with its three-dimensional mesh structure formed by high-temperature sintering, further adsorbs micron-sized particles and some oil mist, improving filtration accuracy. The activated carbon fiber mesh 15, through its porous structure and strong adsorption, efficiently captures odor molecules, volatile organic compounds, and other harmful substances in the gas, achieving graded purification of the casting gas. Secondly, in terms of exhaust, the filtered gas flows into connecting pipe 9, then into exhaust pipe 1 through a set of exhaust plates 81. The spiral guide plate 82 guides the gas into a spiral flow, allowing the airflow to flow smoothly and orderly through another set of exhaust plates 81 into the exhaust pipe 2, achieving a spiral-guided exhaust effect. Regarding the adjustment of the exhaust area, the guide rod 42 is rotated to drive the guide ring 41 to rotate circumferentially along the support block 3. The guide ring 41 drives the connecting column 5 to rotate and slide along the connecting plate 61. The connecting plate 61 transmits power to the connecting rod 62, which drives the valve leaf 7 to open and close within the exhaust pipe 2, thereby adjusting the exhaust area. When the guide rod 42 is adjusted to the designated position, the limiting rod is inserted into the inner wall of the guide rod 42 and simultaneously inserted into the limiting groove of the exhaust pipe 2, thus achieving the positioning and stable connection between the exhaust pipe 2 and the guide rod 42. When the metal wire mesh 13, ceramic fiber mesh 14, and activated carbon fiber mesh 15 need to be replaced, the exhaust pipe 1 is pulled to move the filter pipe 12, causing the locking block 11 to separate from the connecting pipe 9 through the locking groove 10, thus achieving quick unlocking and disassembly of the filter pipe 12 and the connecting pipe 9. Subsequently, the metal wire mesh 13, ceramic fiber mesh 14, and activated carbon fiber mesh 15 are pulled out from the filter pipe 12 in sequence for replacement. The entire process can be completed without the aid of tools, significantly shortening the maintenance time.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low pressure casting mold vent plug comprising a vent tube (1), characterized in that, Also includes: An exhaust pipe (2) is connected to one end of the exhaust pipe (1). A support block (3) is fixed on the outside of the exhaust pipe (2). A guide component (4) is provided inside the support block (3). A connecting column (5) is provided on the outside of the guide component (4). A connecting component (6) is disposed on the outside of the connecting post (5), and a valve leaf (7) for adjusting the outflow volume is disposed on the outside of the connecting component (6). An exhaust assembly (8) is disposed inside an exhaust pipe (1), one end of which is connected to a connecting pipe (9).

2. A low pressure casting mold vent plug according to claim 1, characterized in that: The guide assembly (4) includes a guide ring (41) slidably connected to the inner wall of the support block (3), a guide rod (42) is fixed to the outer side of the guide ring (41), and the outer side of the guide ring (41) is fixed to one end of the connecting column (5).

3. A low pressure casting mold vent plug according to claim 1, characterized in that: The connecting assembly (6) includes a connecting plate (61) slidably connected to the outside of the connecting column (5). A connecting rod (62) is fixed to the inner wall of the connecting plate (61), and the outer side of the connecting rod (62) is rotatably connected to the inner wall of the air outlet pipe (2), and the outer side of the connecting rod (62) is fixed to the inner wall of the valve leaf (7).

4. A low pressure casting mold vent plug according to claim 1, characterized in that: The exhaust assembly (8) includes two sets of exhaust plates (81) fixed to the inner wall of the exhaust pipe (1), and a spiral guide plate (82) is fixed between the two sets of exhaust plates (81).

5. A low pressure casting mold vent plug according to claim 1, characterized in that: The inner wall of the connecting pipe (9) is provided with a slot (10), and a locking block (11) is engaged with the inner wall of the slot (10).

6. A low pressure casting mould vent plug according to claim 5, characterised in that: A filter tube (12) is fixed on one side of the card block (11), and one end of the filter tube (12) is connected to one end of the exhaust pipe (1). A metal wire mesh (13) is attached to the inner wall of the filter tube (12).

7. A low pressure casting mould vent plug according to claim 6, characterised in that: The inner wall of the filter tube (12) is respectively fitted with a ceramic fiber mesh (14) and an activated carbon fiber mesh (15).

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