Casting device for preventing casting defects of nodular iron casting

Abstract

The utility model discloses a casting device capable of preventing casting defects of a nodular iron casting, relates to the technical field of casting devices, and aims to solve the technical problem that the casting quality is reduced due to the fact that casting liquid of an existing casting device easily contains gas, and comprises a furnace body, a base and a heating cylinder, and a casting nozzle is installed on the front end face of the base in a penetrating mode. An exhaust cylinder is fixed to the middle of the interior of the base, the lower end of the heating cylinder is fixedly inserted into the base, an insertion groove is formed in the front side of the bottom end of the interior of the heating cylinder, a butt joint pipe is arranged at the bottom of the insertion groove and communicates with the pouring nozzle, and the furnace body is installed at the upper end of the heating cylinder in an insertion mode. An inserting end is arranged at the lower end of the furnace body, the inserting end is in butt joint with the inserting groove, and the outer side of the heating cylinder is sleeved with a heat preservation sleeve. The utility model has the advantages that the content of gas in casting liquid is further reduced, the casting quality is ensured, and air holes are avoided.

Description

Technical Field

[0001] This utility model relates to the field of casting device technology, and more specifically, to a casting device for preventing casting defects in ductile iron parts. Background Technology

[0002] A casting apparatus is a device used to inject liquid metal, plastic, rubber, or other materials into a mold to manufacture parts or products with specific shapes and sizes.

[0003] Shrinkage cavities, porosity, and inclusions may occur during the casting process of ductile iron parts. Porosity is mostly caused by gas entrapment during pouring. Improper pouring methods, such as uneven flow of molten metal, can trap air, leading to porosity. Alternatively, the molten metal itself may contain gas; if the furnace charge is damp or contains volatile impurities during smelting, these gases may escape after pouring, forming porosity. Existing casting devices are inconvenient for effectively removing air from the molten metal to ensure casting quality. Therefore, we propose a casting device to prevent casting defects in ductile iron parts. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a casting device to prevent casting defects in ductile iron parts, so as to solve the technical problem that the casting liquid of the current casting device is prone to contain gas, which leads to a reduction in casting quality.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a casting device for preventing casting defects in ductile iron parts, comprising a furnace body, a base, and a heating cylinder. A pouring nozzle is installed through the front end face of the base and communicates with the interior of the base. An exhaust pipe is fixed in the middle of the interior of the base. The lower end of the heating cylinder is inserted and fixed inside the base. An insertion groove is provided on the front side of the bottom end of the interior of the heating cylinder. A connecting pipe is provided at the bottom of the insertion groove and communicates with the pouring nozzle. The furnace body is inserted and installed on the upper end of the heating cylinder. An insertion end is provided at the lower end of the furnace body and mates with the insertion groove. An insulation sleeve is fitted on the outer side of the heating cylinder.

[0006] In use, the molten metal is heated within the furnace. During casting, a hydraulic device lifts the furnace body, separating the flow hole at the lower end of the furnace from the plug. The molten metal then flows through the flow hole into the insertion groove, passing over the outer surface of the plug and flowing downwards along the wavy surface. As the molten metal enters the flow channel, the channel bends with the wavy surface. The molten metal follows the direction of the wavy surface as it flows along the channel. When the corresponding flow channel is full, it overflows, covering the wavy surface and flowing downwards, increasing the flow area. At different angles, the flow guides the molten metal, causing the internal solution to tumble. The tumbling motion causes the contained gas to diffuse outwards, reducing the gas content inside the molten metal, lowering the probability of porosity formation, and ensuring the quality of casting. After the molten metal fills the spigot groove, it is discharged outwards from the lower connecting pipe. The connecting pipe guides the solution into the pouring nozzle, and the furnace body is lifted by a hydraulic device. After the furnace body is lifted, the spigot end separates from the spigot groove, allowing the molten metal to fill the spigot groove by gravity flow, and then diffuse outwards to form the casting operation. The gravity flow method for discharging the molten metal stabilizes its flow rate and avoids air entrainment due to uneven flow of the molten metal, further preventing the formation of porosity and ensuring casting quality.

[0007] Preferably, the lower end of the heating cylinder has an assembly hole, the exhaust pipe is inserted into the assembly hole, and a gas collection hood is provided on the rear side of the bottom of the heating cylinder.

[0008] Preferably, the insertion slot is designed to be inclined, and a wave-like surface is provided on the inclined side, with flow grooves evenly spaced on the wave-like surface.

[0009] Preferably, the flow channel is designed horizontally and conforms to the wave surface, with plugs fixed on both sides of the upper end of the wave surface.

[0010] Preferably, the furnace body has flow holes on both sides of the plug end, and the flow holes are connected to the plug, and the plug end is adapted to the plug groove.

[0011] Preferably, the upper sides of the furnace body are connected to the sides of the base via hydraulic devices, the base has supports on both sides, and the bottom of the hydraulic devices is mounted on the supports.

[0012] Preferably, the outer end of the exhaust pipe is connected to the inner side of the bracket, and the gas collection hood is connected to the exhaust pipe inside the assembly hole through a conduit.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the design of the insertion groove, allows the molten metal to be heated within the furnace. During casting, a hydraulic device lifts the furnace body, separating the flow hole at the lower end of the furnace body from the plug. At this time, the molten metal is guided into the insertion groove through the flow hole and flows downward through the outer surface of the plug. It then flows downward over the wavy surface. When the molten metal flows into the flow channel, the flow channel bends with the wavy surface. As the molten metal flows along the flow channel, it follows the direction of the wavy surface. When the corresponding flow channel is filled, it overflows outward, covering the wavy surface and flowing downward, increasing the flow area of ​​the solution. During the flow at different angles, the flow of the molten metal guides the internal solution to tumble. The tumbling at different angles causes the gas contained inside to diffuse outward, reducing the gas content inside the molten metal, lowering the probability of porosity formation, and ensuring the quality of casting production.

[0015] 2. This utility model also incorporates a connecting pipe design. When the molten metal fills the insertion slot, it is discharged outward from the lower connecting pipe. The connecting pipe guides the solution into the pouring nozzle, and a hydraulic device lifts the furnace body. After the furnace body is lifted, the insertion end separates from the insertion slot, allowing the molten metal to flow into the insertion slot by gravity and then diffuse outward to form a casting operation. The gravity-driven discharge of the molten metal ensures a stable flow rate, preventing air entrapment due to uneven flow of the molten metal, further preventing the formation of porosity, and ensuring casting quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the unfolded structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the unfolded structure of the heating cylinder of this utility model;

[0019] Figure 4 This is a cross-sectional view of the base structure of this utility model;

[0020] Figure 5 This is a cross-sectional view of the heating cylinder of this utility model;

[0021] Figure 6 This is a schematic diagram of the furnace body structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the connection structure of this utility model.

[0023] The following are the labels in the diagram: 1. Furnace body; 101. Plug-in end; 102. Flow hole; 2. Hydraulic device; 3. Base; 301. Pouring nozzle; 302. Exhaust pipe; 4. Heating cylinder; 401. Insulation sleeve; 402. Assembly hole; 403. Gas collection hood; 404. Connecting pipe; 405. Flow groove; 406. Plug groove; 407. Corrugated surface; 408. Plug. Detailed Implementation

[0024] like Figures 1 to 6 As shown, this utility model relates to a casting device for preventing casting defects in ductile iron parts, comprising a furnace body 1, a base 3, and a heating cylinder 4. A pouring nozzle 301 is installed through the front end face of the base 3, and the pouring nozzle 301 communicates with the interior of the base 3. An exhaust pipe 302 is fixed in the middle of the interior of the base 3. The lower end of the heating cylinder 4 is inserted and fixed inside the base 3. An insertion groove 406 is provided on the front side of the bottom end of the interior of the heating cylinder 4. A connecting pipe 404 is provided at the bottom of the insertion groove 406, and the connecting pipe 404 communicates with the pouring nozzle 301. The heating cylinder 6 is designed with an incline, and a wave-like surface 407 is provided on the incline side. Flow grooves 405 are equally spaced on the wave-like surface 407. The flow grooves 405 are designed laterally and fit the wave-like surface 407. Plugs 408 are fixed on both sides of the upper end of the wave-like surface 407. An assembly hole 402 is provided at the lower end of the heating cylinder 4. An exhaust pipe 302 is inserted into the assembly hole 402. A gas collection hood 403 is provided on the rear side of the bottom end inside the heating cylinder 4. The exhaust outlet of the exhaust pipe 302 is connected to the inner side of the support. The gas collection hood 403 is connected to the support via a conduit. The exhaust pipe 302 inside the assembly hole 402 generates negative pressure, causing the gas collecting hood 403 to absorb the gas in the cavity and then discharge it outwards. The molten metal is heated inside the furnace body 1. During casting, the furnace body 1 is lifted by the hydraulic device 2. The flow hole 102 at the lower end of the furnace body 1 separates from the plug 408. At this time, the molten metal is guided into the insertion groove 406 through the flow hole 102. The molten metal flows downward through the outer surface of the plug 408 and flows downward through the corrugated surface 407. When the molten metal flows into the flow channel 405... In the flow channel 405, the flow groove bends along the wave surface 407. When the molten metal flows along the flow groove 405, it follows the direction of the wave surface 407. When the corresponding flow groove 405 is filled, it overflows outward, causing the molten metal to cover the wave surface 407 and flow downward, increasing the flow area of ​​the solution. During the flow at different angles, the flow guide of the molten metal causes the internal solution to tumble. The tumbling at different angles causes the gas contained inside to diffuse outward, reducing the gas content inside the molten metal, reducing the probability of porosity formation, and ensuring the quality of casting production.

[0025] like Figures 2 to 7As shown, this utility model relates to a casting device for preventing casting defects in ductile iron parts, comprising a furnace body 1, a base 3, and a heating cylinder 4. The furnace body 1 is inserted and installed on the upper end of the heating cylinder 4. The lower end of the furnace body 1 is provided with an insertion end 101, which aligns with an insertion groove 406. An insulation sleeve 401 is fitted around the outer side of the heating cylinder 4. Flow holes 102 are provided on both sides of the insertion end 101 of the furnace body 1, and the flow holes 102 align with plugs 408. The insertion end 101 is adapted to the insertion groove 406. The upper ends of the furnace body 1 are connected to the sides of the base 3 via hydraulic devices 2. The base 3 is provided with supports on both sides, and the hydraulic devices 2 are connected to the base 3 via hydraulic devices 3. The bottom of the pressure device 2 is mounted on the support. When the molten metal fills the insertion groove 406, it is discharged outward from the connecting pipe 404 at the lower end. The connecting pipe 404 guides the solution into the pouring nozzle 301. The hydraulic device 2 drives the furnace body 1 to rise. When the furnace body 1 is raised, the insertion end 101 separates from the insertion groove 406, allowing the molten metal to flow into the insertion groove 406 by gravity and then diffuse outward to form a casting operation. The molten metal is discharged by gravity, which stabilizes the flow rate and avoids air entrapment due to uneven flow of the molten metal, further preventing the formation of porosity and ensuring casting quality.

[0026] Working principle: This embodiment provides a casting device to prevent casting defects in ductile iron parts. The molten metal is heated in the furnace body 1. During casting, the furnace body 1 is lifted by the hydraulic device 2. The flow hole 102 at the lower end of the furnace body 1 separates from the plug 408. At this time, the molten metal is guided into the insertion groove 406 through the flow hole 102. The molten metal flows downward through the outer surface of the plug 408 and flows downward through the corrugated surface 407. When the molten metal flows into the flow channel 405, the flow channel 405 bends with the corrugated surface 407. As the molten metal flows along the flow channel 405, it follows the direction of the wave surface 407. When the corresponding flow channel 405 is filled, it overflows outward, causing the molten metal to spread across the wave surface 407 and flow downward, increasing the flow area of ​​the solution. When the molten metal fills the insertion groove 406, it is discharged outward from the lower connecting pipe 404. The connecting pipe 404 guides the solution into the pouring nozzle 301, and the furnace body 1 is lifted by the hydraulic device 2. When the furnace body 1 is lifted, the insertion end 101 separates from the insertion groove 406, allowing the molten metal to fill into the insertion groove 406 by gravity.

[0027] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A casting device for preventing casting defects in ductile iron parts, comprising a furnace body (1), a base (3), and a heating cylinder (4), characterized in that: A pouring nozzle (301) is installed through the front end face of the base (3), and the pouring nozzle (301) is connected to the interior of the base (3). An exhaust pipe (302) is fixed in the middle of the interior of the base (3). The lower end of the heating cylinder (4) is inserted and fixed inside the base (3). A plug groove (406) is provided on the front side of the bottom end of the interior of the heating cylinder (4). A connecting pipe (404) is provided at the bottom of the plug groove (406), and the connecting pipe (404) is connected to the pouring nozzle (301). The furnace body (1) is inserted and installed on the upper end of the heating cylinder (4). A plug end (101) is provided at the lower end of the furnace body (1), and the plug end (101) is connected to the plug groove (406). An insulation sleeve (401) is fitted on the outside of the heating cylinder (4).

2. The casting device for preventing casting defects in ductile iron parts according to claim 1, characterized in that: The lower end of the heating cylinder (4) is provided with an assembly hole (402), the exhaust pipe (302) is inserted into the assembly hole (402), and the rear side of the bottom of the heating cylinder (4) is provided with a gas collection hood (403).

3. The casting device for preventing casting defects in ductile iron parts according to claim 2, characterized in that: The insertion slot (406) is designed to be inclined, and a wave surface (407) is provided on the inclined side. Flowing grooves (405) are provided at equal intervals on the wave surface (407).

4. A casting device for preventing casting defects in ductile iron parts according to claim 3, characterized in that: The flow channel (405) is designed horizontally and is fitted with a matching wave surface (407). Both sides of the upper end of the wave surface (407) are fixed with plugs (408).

5. A casting device for preventing casting defects in ductile iron parts according to claim 4, characterized in that: The furnace body (1) has flow holes (102) on both sides of the plug end (101), and the flow holes (102) are connected to the plug (408). The plug end (101) is adapted to the plug groove (406).

6. A casting device for preventing casting defects in ductile iron parts according to claim 5, characterized in that: The upper sides of the furnace body (1) are connected to the sides of the base (3) by hydraulic devices (2). The base (3) has supports on both sides, and the bottom of the hydraulic device (2) is mounted on the supports.

7. A casting device for preventing casting defects in ductile iron parts according to claim 6, characterized in that: The outer end of the exhaust pipe (302) is connected to the inner side of the bracket, and the air collection hood (403) is connected to the exhaust pipe (302) inside the assembly hole (402) through a conduit.

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