Casting method of nodular iron casting

Abstract

The invention relates to the technical field of casting of iron castings, in particular to a casting method of a nodular iron casting, which comprises a workbench, a lower die holder is arranged at the top of the workbench, an upper die holder matched with the lower die holder is arranged above the lower die holder, and an air cylinder for pushing the upper die holder to move is arranged at the top of the upper die holder; and the operating mechanism comprises an electric sliding rail frame, the electric sliding rail frame is fixedly connected to the top of the workbench, and an electric sliding block capable of sliding left and right on the outer side of the electric sliding rail frame is arranged on the outer side of the electric sliding rail frame. Before a nodular iron casting is poured, dust and impurities in the inner wall of the upper mold base and the inner wall of the lower mold base can be cleaned at the same time, cleanliness in the mold is guaranteed, a release agent can be evenly sprayed into the mold through the cleaning assembly, the release agent can form a layer of film on the surface of the mold, and the mold is prevented from being damaged. And the product is prevented from being adhered to the mold in the forming process, so that the product can be smoothly demolded.

Description

Technical Field

[0001] The present invention belongs to the technical field of casting of cast iron parts, and particularly relates to a casting method for ductile iron castings. Background Art

[0002] Ductile iron is a cast iron material obtained through spheroidizing and inoculation treatments. Its graphite morphology changes from the traditional flaky to spherical. This change significantly improves the mechanical properties of the cast iron, especially plasticity and toughness, such that its strength even exceeds that of carbon steel. Ductile iron changes its organizational structure by adding a spheroidizing agent to the cast iron, making its graphite morphology change from flaky to spherical. This spherical graphite structure significantly reduces stress concentration when the material is stressed, thereby improving the overall strength and toughness while retaining the good castability of the cast iron material.

[0003] In the ductile iron casting process, pouring molds are often used. By adding liquid metal into the mold, it is formed and cooled within the mold, and then through processes such as demolding, the required ductile iron workpieces are obtained.

[0004] Then, when the ductile iron casting mold is in use, residual dust and impurities in the mold easily cause a reduction in the quality of the workpieces after production. Dust and impurities on the inner wall of the mold will cause the mold surface to be rough, increasing the friction between the plastic part and the mold and affecting the demolding of the workpieces after molding. For this reason, we propose a casting method for ductile iron castings that is easy to clean and convenient for demolding. Summary of the Invention

[0005] The purpose of the present invention is to provide a casting method for ductile iron castings to solve the problems in the prior art that residual dust and impurities in the mold easily cause a reduction in the quality of the workpieces after production and affect the demolding of the workpieces after molding.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A casting method for ductile iron castings, comprising:

[0008] A workbench, on the top of which there is a lower mold base, above which there is an upper mold base adapted thereto, and on the top of the upper mold base there is a cylinder for pushing the upper mold base to move;

[0009] An operating mechanism, the operating mechanism includes an electric slide rail frame fixedly connected to the top of the workbench. There is an electric slider that can slide left and right on the outside of the electric slide rail frame. In front of the electric slider there is a double-shaft motor, the output shaft of the double-shaft motor is fixedly connected to a rotating plate, and on the outside of the rotating plate there is a cleaning component for cleaning the inner walls of the upper mold base and the lower mold base, and on the outside of the rotating plate there is a coating component that cooperates with the cleaning component for coating a demolding agent on the inner walls of the upper mold base and the lower mold base after cleaning;

[0010] It includes the following operating steps:

[0011] S1. Driven by the electric slide rail frame and the electric slider, the double-shaft motor is moved until it is moved between the upper die holder and the lower die holder;

[0012] S2. At the same time, the cleaning component and the spraying component are operated, and the cleaning component drives the demoulding agent atomized by the spraying component to be evenly sprayed on the inner wall of the die holder;

[0013] S3. The upper die holder is driven to move downward by the cylinder until the bottom of the upper die holder contacts the top of the lower die holder, completing the assembly of the casting die holder for ductile iron castings;

[0014] S4. The liquefied metal liquid is poured in through the upper part of the upper die holder for casting;

[0015] S5. After the workpiece inside the die holder cools down, the upper die holder is opened to demould the formed ductile iron casting;

[0016] S6. The inner walls of the upper die holder and the lower die holder are cleaned by the cleaning component.

[0017] Preferably: The cleaning component includes an air pump, the air pump is fixedly connected to the outside of the rotating plate, a hollow rod is fixedly connected to the outside of the rotating plate, and an arcuate pipe communicated with its inside is arranged at the top end of the hollow rod.

[0018] Preferably: The air outlet of the air pump is fixedly connected with an air pipe, and the other end of the air pipe penetrates through the outside of the hollow rod and is communicated with the inside of the hollow rod.

[0019] Preferably: The outer side of the arcuate pipe is provided with through holes densely distributed at equal intervals for discharging gas or gas carrying the demoulding agent, and the hollow rod is fixedly connected to the outside of the rotating plate in an inclined shape.

[0020] Preferably: The spraying component includes a storage tank, the storage tank is fixedly connected to the outside of the rotating plate, a pump body is fixedly connected to the top of the storage tank, and a liquid outlet pipe is fixedly connected to the liquid outlet of the pump body.

[0021] Preferably: The other end of the liquid outlet pipe is fixedly connected with an atomizing cover, the atomizing cover is arranged in the middle of the air pipe and is communicated with the inner wall of the air pipe, and an atomizing nozzle is arranged at one end of the liquid outlet pipe close to the atomizing cover.

[0022] Preferably: A filling pipe is fixedly connected to the top of the storage tank for replenishing the demoulding agent inside the storage tank when the demoulding agent is insufficient.

[0023] Preferably: A motor seat is fixedly connected to the outside of the double-shaft motor, a mounting rod is fixedly connected to the outside of the motor seat, and the other end of the mounting rod is fixedly connected to the outside of the electric slider.

[0024] Preferably, a pouring hole for liquid to enter is provided at the top of the upper die base, and exhaust holes with adjustable number of openings are provided at the top of the upper die base.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. Through the setting of the cleaning component, before pouring ductile iron castings, the dust and impurities inside the inner walls of the upper die base and the lower die base can be cleaned simultaneously, ensuring the cleanliness of the mold. This can not only improve the production quality of ductile iron castings, but also reduce the friction between the mold and the workpiece after molding, facilitating demolding and improving the production efficiency of ductile iron castings.

[0027] 2. After the cleaning component cleans the dust inside the mold, the spraying component is started. The spraying component transports the atomized release agent into the air pipe in the cleaning component, and the cleaning component evenly sprays the release agent into the mold. The release agent can form a thin film on the surface of the mold, preventing the product from adhering to the mold during the molding process, thus ensuring the smooth demolding of the product and avoiding damage to the product caused by forced demolding, further facilitating the demolding of ductile iron castings.

[0028] 3. Through the setting of the electric slide rail frame and the electric slider, when the mold needs to be cleaned or the release agent is sprayed, the cleaning component and the spraying component can be moved to the middle of the mold, and after cleaning or spraying, the cleaning component and the spraying component are moved out, reducing the time spent on mold cleaning and release agent spraying, and greatly improving the production efficiency of ductile iron castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is one of the three-dimensional views of the present invention;

[0030] Figure 2 is the second three-dimensional view of the present invention;

[0031] Figure 3 is a schematic connection diagram of the electric slider and the double-shaft motor of the present invention;

[0032] Figure 4 is a schematic structural diagram at the double-shaft motor of the present invention;

[0033] Figure 5 is a partial structural schematic diagram at the rotating plate of the present invention;

[0034] Figure 6 is a partial sectional schematic diagram of the atomizing cover of the present invention.

[0035] In the figure: 1, workbench; 2, lower die holder; 3, operating mechanism; 4, upper die holder; 5, cylinder; 31, electric slide rail frame; 32, cleaning component; 321, air pipe; 322, bow-shaped pipe; 323, hollow rod; 324, air pump; 325, through hole; 33, electric slider; 34, spraying component; 341, storage tank; 342, pump body; 343, water outlet pipe; 344, filling pipe; 345, atomizing cover; 346, atomizing nozzle; 35, mounting rod; 36, motor base; 37, double-shaft motor; 38, rotating plate. Specific implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0037] Refer to Figures 1-6 As shown, the present invention provides a casting method for ductile iron castings, including:

[0038] A workbench 1 is provided, a lower die holder 2 is arranged on the top of the workbench 1, an upper die holder 4 adapted to it is arranged above the lower die holder 2, and a cylinder 5 for pushing the upper die holder 4 to move is arranged on the top of the upper die holder 4;

[0039] An operating mechanism 3, the operating mechanism 3 includes an electric slide rail frame 31, the electric slide rail frame 31 is fixedly connected to the top of the workbench 1, an electric slider 33 that can slide left and right on its outer side is arranged on the outer side of the electric slide rail frame 31, a double-shaft motor 37 is arranged on the front side of the electric slider 33, the output shaft of the double-shaft motor 37 is fixedly connected with a rotating plate 38, a cleaning component 32 is arranged on the outer side of the rotating plate 38 for cleaning the inner walls of the upper die holder 4 and the lower die holder 2, and a coating component that cooperates with the cleaning component 32 is arranged on the outer side of the rotating plate 38 for coating the inner walls of the upper die holder 4 and the lower die holder 2 with a release agent after cleaning;

[0040] It includes the following operating steps:

[0041] S1. Drive the double-shaft motor 37 to move under the action of the electric slide rail frame 31 and the electric slider 33 until it is moved between the upper die holder 4 and the lower die holder 2;

[0042] S2. At the same time, operate the cleaning component 32 and the spraying component 34, and the cleaning component 32 drives the release agent atomized by the spraying component 34 to be evenly sprayed on the inner wall of the die holder;

[0043] S3. Drive the upper die holder 4 to move downward through the cylinder 5 until the bottom of the upper die holder 4 contacts the top of the lower die holder 2 to complete the assembly of the casting die holder for ductile iron castings;

[0044] S4. Pour the liquefied molten metal through the upper die holder 4 for casting;

[0045] S5. After the workpiece inside the die holder cools down, open the upper die holder 4 to demold the formed ductile iron casting;

[0046] S6. Clean the inner walls of the upper die holder 4 and the lower die holder 2 through the cleaning component 32.

[0047] In a further embodiment, referring to Figures 1-6 , the cleaning component 32 includes an air pump 324, the air pump 324 is fixedly connected to the outside of the rotating plate 38, a hollow rod 323 is fixedly connected to the outside of the rotating plate 38, an arc-shaped pipe 322 communicating with its interior is provided at the top end of the hollow rod 323, the air outlet of the air pump 324 is fixedly connected to an air pipe 321, the other end of the air pipe 321 penetrates through the outside of the hollow rod 323 and is connected to the interior of the hollow rod 323, through holes 325 are densely distributed at equal intervals on the outside of the arc-shaped pipe 322 for discharging gas or gas-carrying release agent, and the hollow rod 323 is fixedly connected to the outside of the rotating plate 38 in an inclined shape.

[0048] In this embodiment, when it is necessary to clean the inner walls of the upper die holder 4 and the lower die holder 2, the double-shaft motor 37 is moved to the middle of the upper die holder 4 and the lower die holder 2 through the electric slider 33. The air pump 324 blows air into the air pipe 321, then enters the hollow rod 323 through the air pipe 321, and finally discharges through the through holes 325 provided on the outside of the arc-shaped pipe 322 to clean the dust and impurities in the inner walls of the upper die holder 4 and the lower die holder 2, ensuring the cleanliness of the inner walls and facilitating demolding.

[0049] In a further embodiment, referring to Figures 1-6 , the spraying component 34 includes a storage tank 341, the storage tank 341 is fixedly connected to the outside of the rotating plate 38, a pump body 342 is fixedly connected to the top of the storage tank 341, the liquid outlet of the pump body 342 is fixedly connected to a water outlet pipe 343, the other end of the water outlet pipe 343 is fixedly connected to an atomizing cover 345, the atomizing cover 345 is arranged in the middle of the air pipe 321 and is connected to the inner wall of the air pipe 321, an atomizing nozzle 346 is arranged at one end of the water outlet pipe 343 close to the atomizing cover 345, and a filling pipe 344 is fixedly connected to the top of the storage tank 341 for supplementing the release agent inside the storage tank 341 when the release agent is insufficient.

[0050] In this embodiment, the pump body 342 extracts the mold release agent in the storage tank 341 and enters it into the water outlet pipe 343, and sprays it out through the atomizing nozzle 346 provided at the front end of the water outlet pipe 343, and enters the atomizing cover 345. The gas blown by the air pump 324 enters the atomizing cover 345, drives the atomized mold release agent to enter the air pipe 321 again, and finally discharges through the through hole 325, achieving the purpose of uniform spraying of the mold release agent and facilitating demolding.

[0051] In a further embodiment, referring to Figures 1-4 , a motor seat 36 is fixedly connected to the outside of the double-shaft motor 37, an installation rod 35 is fixedly connected to the outside of the motor seat 36, the other end of the installation rod 35 is fixedly connected to the outside of the electric slider 33, a pouring hole for liquid to enter is provided at the top of the upper mold base 4, and exhaust holes with adjustable number of openings are provided at the top of the upper mold base 4.

[0052] In this embodiment, under the action of the motor seat 36 and the installation rod 35, the double-shaft motor 37 can be connected to the electric slider 33. The electric slider 33 can drive the cleaning assembly 32 and the spraying assembly 34 to move, respectively perform spraying of the mold release agent and cleaning of the inner wall of the mold. The pouring hole facilitates the entry of the liquid into the middle of the upper mold base 4 and the lower mold base 2. Under the action of the air holes, it is convenient for the gas to be discharged during pouring, reducing the occurrence of bubbles in the manufactured workpiece.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casting method for ductile iron castings, characterized in that, Including: A workbench (1), on the top of the workbench (1) is provided with a lower die holder (2), above the lower die holder (2) is provided with an upper die holder (4) adapted thereto, and on the top of the upper die holder (4) is provided with a cylinder (5) for pushing the upper die holder (4) to move; An operating mechanism (3), the operating mechanism (3) includes an electric slide rail frame (31), the electric slide rail frame (31) is fixedly connected to the top of the workbench (1), on the outside of the electric slide rail frame (31) is provided with an electric slider (33) that can slide left and right on its outside, on the front side of the electric slider (33) is provided with a double-shaft motor (37), the output shaft of the double-shaft motor (37) is fixedly connected with a rotating plate (38), on the outside of the rotating plate (38) is provided with a cleaning component (32) for cleaning the inner walls of the upper die holder (4) and the lower die holder (2), and on the outside of the rotating plate (38) is provided with a coating component that cooperates with the cleaning component (32) for coating the inner walls of the upper die holder (4) and the lower die holder (2) with a release agent after cleaning; Including the following operating steps: S1. Under the action of the electric slide rail frame (31) and the electric slider (33), drive the double-shaft motor (37) to move until it is moved between the upper die holder (4) and the lower die holder (2); S2. At the same time, operate the cleaning component (32) and the spraying component (34), and the cleaning component (32) drives the release agent atomized by the spraying component (34) to be evenly sprayed on the inner wall of the die holder; S3. Drive the upper die holder (4) to move downward through the cylinder (5) until the bottom of the upper die holder (4) contacts the top of the lower die holder (2) to complete the assembly of the pouring die holder for ductile iron castings; S4. Pour the liquefied metal liquid through the upper part of the upper die holder (4) for pouring; S5. After the workpiece inside the die holder cools, open the upper die holder (4) to demold the formed ductile iron casting; S6. Clean the inner walls of the upper die holder (4) and the lower die holder (2) through the cleaning component (32).

2. The casting method of the ductile iron casting according to claim 1, characterized in that: The cleaning component (32) includes an air pump (324), the air pump (324) is fixedly connected to the outside of the rotating plate (38), on the outside of the rotating plate (38) is fixedly connected with a hollow rod (323), and at the top of the hollow rod (323) is provided with an arc-shaped pipe (322) communicated with its inside.

3. The casting method of the ductile iron casting according to claim 1, characterized in that: The air outlet of the air pump (324) is fixedly connected with an air pipe (321), and the other end of the air pipe (321) penetrates through the outside of the hollow rod (323) and is communicated with the inside of the hollow rod (323).

4. The casting method of ductile iron castings according to claim 1, characterized in that: The outside of the arc-shaped pipe (322) is provided with through holes (325) densely distributed at equal intervals for discharging gas or gas carrying a release agent, and the hollow rod (323) is fixedly connected to the outside of the rotating plate (38) in an inclined shape.

5. The casting method of the ductile iron casting according to claim 1, characterized in that: The spraying component (34) includes a storage tank (341), the storage tank (341) is fixedly connected to the outside of the rotating plate (38), on the top of the storage tank (341) is fixedly connected with a pump body (342), and the liquid outlet of the pump body (342) is fixedly connected with a water outlet pipe (343).

6. The casting method of the ductile iron casting according to claim 1, characterized in that: The other end of the water outlet pipe (343) is fixedly connected to an atomizing cover (345). The atomizing cover (345) is arranged in the middle of the air pipe (321) and is communicated with the inner wall of the air pipe (321). An atomizing nozzle (346) is arranged at one end of the water outlet pipe (343) close to the atomizing cover (345).

7. The casting method of the ductile iron casting according to claim 1, characterized in that: A filling pipe (344) is fixedly connected to the top of the storage tank (341) and is used for replenishing the release agent inside the storage tank (341) when the release agent is insufficient.

8. The casting method of the ductile iron casting according to claim 1, characterized in that: A motor seat (36) is fixedly connected to the outside of the double-shaft motor (37). An installation rod (35) is fixedly connected to the outside of the motor seat (36). The other end of the installation rod (35) is fixedly connected to the outside of the electric slider (33).

9. The casting method of the ductile iron casting according to claim 1, characterized in that: A pouring hole for liquid to enter is arranged at the top of the upper mold base (4). Exhaust holes with adjustable opening numbers are arranged at the top of the upper mold base (4).

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