A method for embedding a cold iron in a mold shell

Abstract

The present application relates to the technical field of melting and casting, in particular to a melting and casting method for embedding cold iron in a mold shell. The method comprises obtaining structural parameters of a casting; comparing the wall thickness size of the casting with a preset threshold value, and planning a plurality of cold iron embedding areas on the surface position where the wall thickness size is greater than the preset threshold value; manufacturing a wax mold module according to the surface orientation corresponding to the plurality of cold iron embedding areas; coating slurry on the wax mold module to form a mold shell assembly; separating the product wax mold and the cold iron wax mold in the mold shell assembly after the coating of the mold shell assembly is completed; placing a second cold iron entity in the first mold shell after the separation of the product wax mold and the cold iron wax mold is completed; and performing a pouring forming process on the mold shell assembly. Thus, the problem of the melting and casting method needing to consider the close fit of the cold iron and the casting and the melting and casting efficiency is solved.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and more specifically, to a casting method for embedding chills in a mold shell. Background Technology

[0002] Investment casting is a core technology for producing precision castings. Its main process consists of multiple consecutive steps, including wax pattern injection, mold assembly, slurry application for shell formation, dewaxing, pouring, solidification, and shell removal, to achieve the desired precision casting. During investment casting, for castings with thick end faces, chills are typically used to accelerate the localized cooling rate of the casting and prevent defects such as shrinkage cavities and porosity that affect product quality, in order to effectively control the solidification sequence and avoid defects. This ensures the quality of the final casting.

[0003] However, castings typically have multiple thick end faces, requiring chills to be assembled at various locations to meet cooling requirements. But due to variations in the location of these thick end faces, and limitations in space or assembly methods at some locations, it is difficult to simultaneously ensure a tight fit between the chills and the casting, as well as efficient melting and casting. Summary of the Invention

[0004] To address the challenge of balancing the tight fit between the chill and the casting in a casting method with casting efficiency, this invention provides a casting method for embedding chills in a mold shell, comprising:

[0005] Obtain the structural parameters of the casting; the structural parameters include the surface orientation and corresponding wall thickness of the casting in a preset posture.

[0006] The wall thickness of the casting is compared with a preset threshold, and several chill embedding areas are planned on the surface where the wall thickness is greater than the preset threshold.

[0007] A wax model assembly is fabricated according to the surface orientation corresponding to several chilled iron embedding areas; the wax model assembly includes a product wax model, a chilled iron wax model, and a first chilled iron entity; the product wax model has the same geometry as the casting; the chilled iron wax model is located in the chilled iron embedding area of ​​the product wax model with its surface orientation facing upwards; the chilled iron wax model is integrally formed with the product wax model; the first chilled iron entity is located in the chilled iron embedding area of ​​the product wax model with its surface orientation facing downwards or horizontally; the first chilled iron entity is bonded to the product wax model;

[0008] The wax model assembly is coated with a slurry to form a shell assembly; the shell assembly includes a shell body, a first shell, and a second shell; the shell body covers the surface of the product wax model; the first shell covers the surface of the chilled wax model; the second shell covers the surface of the first chilled solid.

[0009] After the shell assembly is coated, the product wax model and the chilled iron wax model in the shell assembly are separated.

[0010] Once the product wax model and the chilled iron wax model have separated, the second chilled iron entity is placed in the first shell.

[0011] The shell assembly is then subjected to a casting process.

[0012] Optionally, in the preset posture, the diameter of the chill wax model gradually decreases from top to bottom. When the second chill entity is placed in the first shell, the first region of the peripheral sidewall of the second chill entity abuts against the first shell, and the second region of the peripheral sidewall of the second chill entity is spaced apart from the first shell; the second region is located above the first region.

[0013] Optionally, the step of creating a wax model assembly based on the surface orientation corresponding to the plurality of chilled iron embedding areas includes:

[0014] Make one-piece molded product wax models and cold iron wax models;

[0015] The chilled iron embedding area of ​​the product wax mold with its surface facing downward or horizontal is preheated;

[0016] Based on the completion of the preheating, the first chill iron entity is attached to the chill iron embedding area where the surface of the product wax mold is facing downward or horizontal.

[0017] The outer surface of the first chilled iron entity is covered with an insulating wax film.

[0018] Optionally, the thickness of the insulating wax film is 1mm to 2mm.

[0019] Optionally, in the preset posture, the thickness of the insulating wax film of the product wax mold gradually decreases from bottom to top.

[0020] Optionally, the insulating wax film includes multiple layers of insulating wax paper; the multiple layers of insulating wax paper are sequentially wrapped around the outer surface of the first chilled iron entity; when the product wax mold is in the preset posture, the area covered by the multiple layers of insulating wax paper on the first chilled iron entity gradually shrinks downward.

[0021] Optionally, the insulating wax film extends upward from the bottom of the first chill entity to cover 3 / 4 of the first chill entity.

[0022] Optionally, the product wax mold has a ring-shaped structure; the inner ring thickness of the shell body is greater than the outer ring thickness of the shell body.

[0023] Optionally, the step of placing the second chilled iron entity into the first mold shell after the product wax model and the chilled iron wax model have been separated includes:

[0024] Once the product wax model and the chilled iron wax model have separated, a placement opening is made on the first shell.

[0025] The second chilled iron is placed into the first shell through the placement port;

[0026] The second chill is placed in the first shell, and the placement opening is sealed to complete the placement step of the second chill.

[0027] Optionally, the process of casting the shell assembly includes:

[0028] After the placement step of the second cold iron entity is completed, molten metal is poured into the shell assembly;

[0029] After the pouring is completed, the shell assembly after the pouring of the molten metal will be cooled for a preset time;

[0030] The shell assembly is detached and cleaned to obtain the casting.

[0031] To address the challenge of balancing the tight fit between the chill and the casting in the casting method with casting efficiency, this invention offers the following advantages:

[0032] 1. Due to the spatial arrangement of the first chill, which is downward-facing and horizontal, it is difficult to embed. This is mainly because an opening needs to be made in the second shell to insert the first chill. Therefore, this application adopts a pre-embedded fixing method for embedding the first chill, avoiding the problems of the first chill easily falling off and not being firmly attached, thus ensuring the reliability of the first chill embedding. The second chill is embedded using a pre-reserved cavity method, that is, the product wax model and the chill wax model are integrally formed. After forming the shell assembly, the second chill is directly placed into the cavity of the first shell. The second chill fits tightly with the first shell due to its own weight, eliminating the need for gluing, thereby improving the embedding efficiency of the second chill. This application uses corresponding embedding methods for the first and second chills in the embedding areas with different surface orientations, ensuring the fit of the first and second chills to the casting while improving the embedding efficiency of the second chill. This allows for rapid cooling of the thick end face of the casting, improving the internal density and forming stability of the casting.

[0033] 2. Multiple layers of insulating wax paper are sequentially wrapped around the outer surface of the first chill. With the product wax mold in a preset position, the area covered by the insulating wax paper gradually decreases downwards. This accommodates the characteristics of the first chill, where the lower part experiences more concentrated heat and greater expansion during casting. A larger gap is reserved at the bottom to effectively prevent damage to the lower part of the second shell. The smaller gap at the top reduces the possibility of molten metal seeping into the space of the second shell, ensuring the casting can be formed in one step, reducing the number of processing steps in casting manufacturing, and thus further improving efficiency. Attached Figure Description

[0034] Figure 1 A flowchart of a casting method for embedding chills in a mold shell according to one embodiment is shown;

[0035] Figure 2 A schematic diagram of the structure of a shell assembly according to one embodiment is shown;

[0036] Figure 3 It shows Figure 2 Front view of the medium-sized shell assembly;

[0037] Figure 4 It shows Figure 3 Cross-sectional view of a medium-sized shell assembly;

[0038] Figure 5 A schematic diagram of the structure of a wax mold module according to one embodiment is shown;

[0039] Figure 6 It shows Figure 5 Cross-sectional view of the middle wax mold module;

[0040] Figure 7 A schematic diagram is shown showing the first chilled iron solid covered with multiple layers of insulating wax paper;

[0041] Figure 8 A schematic diagram is shown of the first chilled iron solid being covered with an insulating wax film.

[0042] Reference numerals: Wax mold module 10; Product wax mold 11; Chilled iron wax mold 12; First chilled iron entity 13; Second chilled iron entity 20; Shell assembly 30; Shell body 31; First shell 32; Second shell 33; Release wax paper 40; Release wax film 41. Detailed Implementation

[0043] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0044] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0045] Currently, due to the different positions of the end faces of castings with different thicknesses, some positions are limited by space or assembly methods, making it difficult to achieve both tight fit between the chill and the casting and casting efficiency.

[0046] In this embodiment, to solve the above problems, this application provides a casting method for embedding chills in a mold shell. For example... Figure 1 As shown, the casting method for embedding chills in the mold shell includes steps S10 to S70. The casting method for embedding chills in the mold shell executes steps S10, S20, S30, S40, S50, S60 and S70 in sequence.

[0047] Step S10: Obtain the structural parameters of the casting, including the surface orientation and corresponding wall thickness of the casting in a preset posture.

[0048] Step S20 involves comparing the wall thickness of the casting with a preset threshold, and planning several chill embedding areas on the surface where the wall thickness exceeds the preset threshold. This should be understood as the area where the wall thickness exceeds the preset threshold being a thick end face. A first chill entity 13 and a second chill entity 20 need to be embedded in this area to ensure that during the cooling process after the molten metal is poured, the casting can utilize the first chill entity 13 and the second chill entity 20 to accelerate the cooling of the chill embedding area, thus preventing shrinkage cavities and porosity in the casting during cooling.

[0049] Step S30: Create a wax model module 10 according to the surface orientation corresponding to several chilled iron embedding areas. For example... Figure 5 , Figure 6 As shown, the wax model module 10 includes a product wax model 11, a chill wax model 12, and a first chill entity 13. The product wax model 11 has the same geometry as the casting. The chill wax model 12 is located in the chill embedding area on the surface of the product wax model 11, with the surface facing upwards. Since the second chilled iron entity 20 is easier to install from top to bottom in the chilled iron embedding area with the surface of the product wax model 11 facing upwards, and it is also easier to fix the second chilled iron entity 20, the chilled iron embedding area with the surface of the product wax model 11 facing upwards adopts a reserved cavity type. The reserved cavity type is formed by the chilled iron wax model 12 and the product wax model 11 being integrally formed. This allows the chilled iron wax model 12 to reserve space for the second chilled iron entity 20 when the mold shell is made by applying the paste in the later stage. The second chilled iron entity 20 can then be directly placed into the cavity of the first mold shell 32 and will fit tightly against the inner wall of the first mold shell 32 by its own weight, without the need to glue the second chilled iron entity 20, thereby improving the embedding efficiency of the second chilled iron entity 20. Because using a pre-reserved cavity in the chill embedding area of ​​the product wax model 11, where the surface is facing downwards or horizontally, is not conducive to the embedding of the first chill entity 13, it is problematic. If the first chill entity 13 is embedded using a pre-reserved cavity after the shell assembly 30 is formed, the cavity will be located at the bottom or side of the shell assembly 30 chamber. This not only makes it difficult to fix the first chill entity 13 but also increases the risk of it falling off, resulting in low embedding efficiency. Therefore, this application adopts a pre-embedded fixing method for embedding the first chill entity 13. Specifically, the first chill entity 13 is located in the chill embedding area of ​​the product wax model 11, where the surface is facing downwards or horizontally, and is bonded to the product wax model 11. By integrating the first chill entity 13 with the product wax model 11, after the shell assembly 30 is formed by applying the slurry, there is no need to embed the first chill entity 13 again, thus ensuring the reliability of the first chill entity 13 embedding.

[0050] The surface of the product wax model 11 is facing upwards, and the chilled iron embedding area is as follows: Figure 6The upper surface of the product wax model 11 shown. The first chill body 13 is located on the surface of the product wax model 11, and the chill embedding area is in a downward or horizontal state as shown. Figure 6 As shown, the side and bottom of the product wax model 11.

[0051] Step S40: Apply slurry to the wax model assembly 10 to form the shell assembly 30. For example... Figure 2 , Figure 3 , Figure 4 As shown, the mold shell assembly 30 includes a mold shell body 31, a first mold shell 32, and a second mold shell 33. The mold shell body 31 covers the surface of the product wax model 11, the first mold shell 32 covers the surface of the chill wax model 12, and the second mold shell 33 covers the surface of the first chill entity 13. The mold shell assembly 30 provides a cavity for subsequent casting molding. The first mold shell 32 contains the second chill entity 20, and the second mold shell 33 contains the first chill entity 13. This ensures that the first chill entity 13 and the second chill entity 20 can precisely act on the surface of the casting after the molten metal is poured and the casting is cooled, accelerating the cooling of the thick end face of the casting and preventing shrinkage cavities and porosity during the cooling process.

[0052] In step S50, after the coating of the shell assembly 30 is completed, the product wax model 11 and the chilled iron wax model 12 in the shell assembly 30 are detached. The product wax model 11 and the chilled iron wax model 12 can be dewaxed by steam or infrared methods. The product wax model 11 and the chilled iron wax model 12 are subjected to high temperature and gradually vaporize and are discharged from the pores of the shell assembly 30.

[0053] In step S60, based on the completion of the separation of the product wax model 11 and the chill wax model 12, the second chill entity 20 is placed in the first shell 32. It is worth noting that the size and structure of the second chill entity 20 are smaller than the chill wax model 12, thereby reserving space for the subsequent thermal expansion of the second chill entity 20. This ensures that the second chill entity 20 can accelerate the cooling of the thick end face of the casting during the subsequent casting process without causing the shell assembly 30 to crack.

[0054] Step S70: Perform a casting process on the shell assembly 30.

[0055] Furthermore, since the second chilled iron entity 20 needs to be embedded in the first shell 32, when the chilled iron wax model 12 and the product wax model 11 detach, the embedded second chilled iron entity 20 is prone to falling into the cavity of the shell body 31. Therefore, in a preset posture, the diameter of the chilled iron wax model 12 gradually decreases from top to bottom, so that the first shell 32 forms a structure of the same shape. The second chilled iron entity 20 also adopts a structure with a diameter that gradually decreases from top to bottom to prevent the second chilled iron entity 20 from slipping into the cavity of the shell body 31. Preferably, the chilled iron wax model 12 can be conical or frustum-shaped. It is worth noting that the size of the second chilled iron entity 20 is smaller than the cavity in the first shell 32, that is, the size of the second chilled iron entity 20 is smaller than the chilled iron wax model 12, leaving a certain amount of redundant space for the subsequent thermal expansion of the second chilled iron entity 20, and avoiding damage to the first shell 32 caused by the thermal expansion of the second chilled iron entity 20. When the second chill 20 is placed in the first mold shell 32, the first region of the peripheral sidewall of the second chill 20 abuts against the first mold shell 32, preventing molten metal from flowing into the cavity of the first mold shell 32 when molten metal is poured into the mold shell body 31. This eliminates the need for subsequent cutting of excess solidified molten metal on the casting. The second region of the peripheral sidewall of the second chill 20 is spaced apart from the first mold shell 32, ensuring that the second chill 20 has sufficient deformation space for thermal expansion and contraction, preventing it from becoming too large and breaking the mold shell due to the high temperature of the molten metal. The second region is located above the first region, which should be understood as the second region being... Figure 4 As shown, the upper surface and side surface of the second chill body 20, and the first region is the bottom of the second chill body 20.

[0056] Further, step S30 includes steps S31 to S34, and the casting method for embedding chills in the mold shell is performed sequentially in steps S10, S20, S31, S32, S33, S34, S40, S50, S60 and S70.

[0057] Step S31: Create an integrally molded product wax model 11 and a chilled iron wax model 12 to ensure the overall dimensional accuracy of the product wax model 11 and the chilled iron wax model 12, and avoid gaps, misalignments and dimensional deviations caused by the splicing of separate parts.

[0058] Step S32: Preheat the chilled iron embedding area of ​​the product wax model 11, where the surface is facing downwards or horizontally. By preheating the chilled iron embedding area, the surface of the product wax model 11 is softened, making it easier for the wax model surface to adhere to the chilled iron. This avoids the problem of the first chilled iron entity 13 not adhering firmly and easily falling off due to the product wax model 11 surface being too hard or the temperature being too low.

[0059] Step S33: Based on the completion of preheating, the first chilled iron entity 13 is attached to the chilled iron embedding area on the surface of the product wax mold 11 in either a downward or horizontal state.

[0060] Step S34: Cover the outer surface of the first chill entity 13 with an insulating wax film 41. Due to the difference in thermal expansion coefficients between the first chill entity 13 and the shell assembly 30, the shell assembly 30 is prone to cracking, and the surface of the first chill entity 13 is easily oxidized to form oxide scale, affecting the surface quality of the casting. Therefore, this application uses an insulating wax film 41 to cover the outer surface of the first chill entity 13, leaving sufficient gaps for the thermal expansion of the first chill entity 13. When the product wax mold 11 separates from the chill wax mold 12, the insulating wax film 41 also separates.

[0061] Furthermore, the thickness of the insulating wax film 41 is 1mm to 2mm. This thickness range ensures that the insulating wax film 41 provides sufficient space for thermal expansion of the first chilled iron entity 13 after it is removed, and also prevents molten metal from seeping into the space of the second shell 33 due to excessive gaps.

[0062] Furthermore, in the preset posture, the thickness of the insulating wax film 41 of the product wax mold 11 gradually decreases from bottom to top, adapting to the characteristics of the first chilled iron solid 13, where the lower part is heated more concentratedly and expands more during the pouring process. A larger gap is reserved at the bottom to effectively prevent the lower part of the second shell 33 from being damaged. The upper gap is smaller to prevent molten metal from penetrating into the space of the second shell 33.

[0063] Furthermore, such as Figure 7 As shown, the insulating wax film 41 comprises multiple layers of insulating wax paper 40, which are sequentially wrapped around the outer surface of the first chilled iron entity 13. With the product wax mold 11 in a preset position, the area covered by the multiple layers of insulating wax paper 40 on the first chilled iron entity 13 gradually decreases downwards. This precise control of the thickness and gradient structure of the insulating wax paper 40 results in a more uniform thickness and better adhesion. It also prevents the single layer of insulating wax paper 40 from easily falling off if it is too thick, or easily breaking if it is too thin, improving the stability of the gap and ensuring the reliability of the cooling expansion space.

[0064] Furthermore, such as Figure 8 As shown, the insulating wax film 41 extends upward from the bottom of the first chill body 13 to cover 3 / 4 of the first chill body 13. It should be understood that if the first chill body 13 is quadrilateral, the upward-facing side will contact the casting, providing rapid cooling for the casting. Therefore, it is only necessary to cover 3 / 4 of the first chill body 13 to prevent molten metal from flowing into the cavity of the second shell 33. At the same time, gaps are reserved for the main thermal expansion areas of the first chill body 13 to prevent the second shell 33 from cracking to the greatest extent.

[0065] Furthermore, the product wax model 11 has a ring-shaped structure, and the inner ring thickness of the shell body 31 is greater than the outer ring thickness. Since the product wax model 11 has a ring-shaped structure, the casting also has a ring-shaped structure. Therefore, the heat of the outer ring is more dispersed, while the heat of the inner ring is more concentrated. The thinner outer ring of the shell body 31 helps to dissipate heat from the casting, while the thicker inner ring ensures the overall strength of the shell body 31.

[0066] Further, step S60 includes steps S61 to S63, and the casting method for embedding chills in the mold shell is performed sequentially in steps S10, S20, S30, S40, S50, S61, S62, S63, and S70.

[0067] Step S61: After the product wax model 11 and the chilled iron wax model 12 have been separated, a placement opening is made on the first shell 32.

[0068] Step S62: The second chilled iron entity 20 is placed into the first shell 32 through the placement port.

[0069] Step S63: Based on the placement of the second chill entity 20 within the first shell 32, the placement opening is sealed to complete the placement step of the second chill entity 20. The sealing method can be to use a viscous slurry of the same material as the shell assembly 30 to seal the placement opening, or to use a material of refractory aggregate and silica sol to seal the placement opening, ensuring that the first shell 32 is in a sealed state. This prevents leakage and displacement of the second chill entity 20 during subsequent pouring, ensuring that the first shell 32 is reliably sealed.

[0070] Further, step S70 includes steps S71 to S73, and the casting method for embedding chills in the mold shell is performed sequentially in steps S10, S20, S30, S40, S50, S61, S62, S63, S71, S72, and S73.

[0071] Step S71: After the placement of the second chill entity 20 is completed, molten metal is poured into the shell assembly 30. This allows the molten metal to form within the cavity of the shell assembly 30, ensuring that the shape and structure of the casting meet the design requirements.

[0072] In step S72, based on the completion of pouring, the shell assembly 30 after pouring molten metal is cooled for a preset time to allow the casting to fully solidify and stabilize its microstructure. At the same time, the first chill body 13 and the second chill body 20 can rapidly cool the molten metal in the corresponding areas, which is beneficial for controlling the solidification of the casting and reducing the occurrence of casting defects such as shrinkage cavities and porosity.

[0073] Step S73: The shell assembly 30 is detached and cleaned, and the shell assembly 30 is completely removed to finally obtain a finished casting with qualified surface and internal quality.

[0074] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A casting method for embedding chills in a mold shell, characterized in that, The casting method for embedding chills in the mold shell includes: Obtain the structural parameters of the casting; the structural parameters include the surface orientation and corresponding wall thickness of the casting in a preset posture. The wall thickness of the casting is compared with a preset threshold, and several chill embedding areas are planned on the surface where the wall thickness is greater than the preset threshold. A wax model assembly is fabricated according to the surface orientation corresponding to several chilled iron embedding areas; the wax model assembly includes a product wax model, a chilled iron wax model, and a first chilled iron entity; the product wax model has the same geometry as the casting; the chilled iron wax model is located in the chilled iron embedding area of ​​the product wax model with its surface orientation facing upwards; the chilled iron wax model is integrally formed with the product wax model; the first chilled iron entity is located in the chilled iron embedding area of ​​the product wax model with its surface orientation facing downwards or horizontally; the first chilled iron entity is bonded to the product wax model; The wax model assembly is coated with a slurry to form a shell assembly; the shell assembly includes a shell body, a first shell, and a second shell; the shell body covers the surface of the product wax model; the first shell covers the surface of the chilled wax model; the second shell covers the surface of the first chilled solid. After the shell assembly is coated, the product wax model and the chilled iron wax model in the shell assembly are separated. Once the product wax model and the chilled iron wax model have separated, the second chilled iron entity is placed in the first shell. The shell assembly is subjected to a casting molding process; In the preset posture, the diameter of the chilled iron wax model gradually decreases from top to bottom. When the second chilled iron entity is placed in the first molded shell, the first region of the peripheral sidewall of the second chilled iron entity abuts against the first molded shell, and the second region of the peripheral sidewall of the second chilled iron entity is spaced apart from the first molded shell; the second region is located above the first region. The process of creating a wax model module based on the surface orientation corresponding to the plurality of chilled iron embedding areas includes: Make one-piece molded product wax models and cold iron wax models; The chilled iron embedding area of ​​the product wax mold with its surface facing downward or horizontal is preheated; Based on the completion of the preheating, the first chill iron entity is attached to the chill iron embedding area where the surface of the product wax mold is facing downward or horizontal. The outer surface of the first chilled iron entity is covered with an insulating wax film.

2. The casting method for embedding chills in a mold shell according to claim 1, characterized in that, The thickness of the insulating wax film is 1mm to 2mm.

3. The casting method for embedding chills in a mold shell according to claim 1, characterized in that, In the preset posture, the thickness of the insulating wax film on the product wax mold gradually decreases from bottom to top.

4. The casting method for embedding chills in a mold shell according to claim 3, characterized in that, The insulating wax film comprises multiple layers of insulating wax paper; the multiple layers of insulating wax paper are sequentially wrapped around the outer surface of the first chilled iron entity; the product wax mold is in the preset posture, and the area covered by the multiple layers of insulating wax paper on the first chilled iron entity gradually shrinks downward.

5. The casting method for embedding chills in a mold shell according to claim 1, characterized in that, The insulating wax film extends upwards from the bottom of the first chill entity to cover 3 / 4 of the first chill entity.

6. The casting method for embedding chills in a mold shell according to claim 1, characterized in that, The product wax mold has a ring-shaped structure; the inner ring thickness of the shell body is greater than the outer ring thickness of the shell body.

7. The casting method for embedding chills in a mold shell according to claim 1, characterized in that, The step of placing the second chilled iron entity into the first mold shell after the separation of the product wax mold and the chilled iron wax mold is completed includes: Once the product wax model and the chilled iron wax model have separated, a placement opening is made on the first shell. The second chilled iron is placed into the first shell through the placement port; The second chill is placed in the first shell, and the placement opening is sealed to complete the placement step of the second chill.

8. The casting method for embedding chills in a mold shell according to claim 7, characterized in that, The process of casting and molding the shell assembly includes: After the placement step of the second cold iron entity is completed, molten metal is poured into the shell assembly; After the pouring is completed, the shell assembly after the pouring of the molten metal will be cooled for a preset time; The shell assembly is detached and cleaned to obtain the casting.

Images