Wax piece shaping method for special-shaped thin-wall pressure-bearing part
By designing a molding mold and producing and cooling the wax part simultaneously during the casting process of irregularly shaped thin-walled pressure-bearing components, the deformation problem during the cooling process of the wax part was solved, and the stability and precision of the wax part dimensions were improved.
Patent Information
- Application Number
- CN202511169261.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-01-09
AI Technical Summary
In the casting process of irregularly shaped thin-walled pressure-bearing components, the wax parts are prone to deformation during the cooling process, leading to production failure. The existing fixed-size base material is mismatched and cannot effectively prevent the deformation of the wax parts.
The mold design includes two cavities: a wax part and a shaping base. The wax part and the shaping base are produced and cooled simultaneously. The shaping base has support parts in easily deformable areas to ensure that the wax part and the shaping base have the same shrinkage rate during the cooling process, thus avoiding deformation.
By synchronizing production and cooling, the dimensions of the wax parts are kept stable, thus improving their dimensional accuracy and resistance to deformation.
Smart Images
Figure CN121289397A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of casting technology, and in particular to a wax shaping method for irregularly shaped thin-walled pressure-bearing components. Background Technology
[0002] In the casting process of irregularly shaped thin-walled pressure-bearing components, the components have complex structures and thin walls. They are formed into wax parts through molds. During the cooling process, the irregular placement of the wax parts causes them to deform in various directions. The main reason is that during the production process, the complex structure and excessively thin walls of the wax parts make it difficult for them to withstand the overall deformation stress, which is insufficient to support gravity or other forces. As a result, the wax parts undergo various deformations during the cooling process, ultimately leading to severely deformed and scrapped wax parts.
[0003] Traditional molding bases have fixed dimensions and structures, and most are made of aluminum, bakelite, or other easily processed materials. The dimensions of the molding base are usually set to the size of the wax part after it has cooled to the point where it no longer shrinks. The set dimensions do not match the size of the wax part when it is just taken out of the mold, which makes the molding base unable to effectively prevent the wax part from deforming. Summary of the Invention
[0004] Therefore, it is necessary to provide a wax shaping method for irregularly shaped thin-walled pressure-bearing components to address the problems in the existing technology.
[0005] A method for shaping wax parts for irregularly shaped thin-walled pressure-bearing components, characterized by comprising: The molding die design includes a first cavity for molding wax parts and a second cavity for molding a shaping base; In wax injection production, wax is injected into a molding die to form a wax part and a shaped base. For assembly and shaping, the wax part formed by wax injection and the shaping base are removed, and the wax part is placed on the shaping base to form an assembled whole. Cooling and separation: The entire assembly is placed on a cooling platform for cooling. After cooling, the wax part is removed from the top of the molding base.
[0006] In one embodiment, the wax piece has a deformable part with no bottom support, and the shaping base has a support part located on the lower side of the deformable part in the deformation direction.
[0007] In one embodiment, the shaping base includes a base with a flat bottom and a positioning groove on the upper side of the base that matches the shape of the bottom of the wax piece. The main body of the wax piece is positioned on the upper side of the shaping base through the positioning groove, and the lower side of the deformable part of the wax piece is supported by a side support and a bottom support.
[0008] In one embodiment, the bottom of the shaping base is provided with an annular protrusion, which is distributed along the edge of the shaping base. The bottom of the base is also provided with longitudinal and transverse dividing ribs that are distributed in a cross pattern to divide the bottom of the base into several independent spaces.
[0009] In one embodiment, the support portion includes a side support portion and a bottom support portion, the side support portion being located at the side of the wax piece and the bottom support portion being located at the bottom of the wax piece.
[0010] In one embodiment, both the side support and the bottom support include a support body that extends upward from the base of the shaping base. The sidewall of the support body is an inclined sidewall with a certain angle, and the top of the inclined sidewall is sealed to form a support top surface.
[0011] In one embodiment, the supporting body is a solid formed by inclined sidewalls and a supporting top surface, or a hollow part with its bottom communicating with the outside.
[0012] In one embodiment, the inclined sidewalls, the top surface of the support, and the deformable portion of the bottom support have the same thickness.
[0013] In one embodiment, the top surface of the bottom support is provided with a top groove adapted to the shape of the wax piece, and the center of the top groove is provided with a through hole communicating with the hollow part of the support body.
[0014] The above-mentioned wax shaping method for irregular thin-walled pressure-bearing components involves the molding base and the wax being produced simultaneously using the same mold and then assembled together for cooling. This ensures that the molding base and the wax product have completely consistent molding and cooling conditions, and that the wax and the molding base have the same shrinkage rate during cooling. This helps maintain the dimensional stability of the wax during cooling and prevents deformation, thereby improving the dimensional accuracy of the wax. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the shaping base and wax forming structure in the wax shaping method for irregularly shaped thin-walled pressure-bearing parts of the present invention. Figure 2 This is a schematic diagram of the wax part structure in the wax part shaping method for irregularly shaped thin-walled pressure-bearing components of the present invention; Figure 3 This is a schematic diagram of the shaping base in the wax shaping method for irregularly shaped thin-walled pressure-bearing parts of the present invention; Figure 4 This is a schematic diagram of the structure of the wax part and the wax part during the assembly and cooling of the wax part in the wax part shaping method of the irregular thin-walled pressure-bearing parts of the present invention. Figure 5This is a schematic diagram of the bottom structure of the shaping base in the wax shaping method for irregularly shaped thin-walled pressure-bearing parts of the present invention; Among them, 1. Wax parts; 11. Easily deformable parts; 2. Shaping base; 21. Base; 22. Positioning groove; 23. Annular protrusion; 24. Longitudinal dividing rib; 25. Transverse dividing rib; 3. Support part; 31. Side support part; 32. Bottom support part; 33. Support body; 331. Inclined side wall; 332. Support top surface; 333. Top groove; 334. Through hole. Detailed Implementation
[0016] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0017] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0019] like Figures 1 to 5 As shown, a wax shaping method for irregularly shaped thin-walled pressure-bearing components is characterized by including: The molding die design includes a first cavity for molding the wax part 1 and a second cavity for molding the shaping base 2; In wax injection production, wax is injected into a molding die to form wax part 1 and shaping base 2; For assembly and shaping, remove the wax part 1 and the shaping base 2 formed by wax injection, and place the wax part 1 on the upper side of the shaping base 2 to form an assembled whole. Cooling and separation: The entire assembly is placed on a cooling platform for cooling. After cooling, the wax part 1 is removed from the top of the shaping base 2.
[0020] The shaping base 2 and the wax part 1 are produced in the same mold and at the same time. After production, they are assembled together for cooling. In this way, the molding conditions and cooling conditions of the shaping base 2 and the wax part 1 are completely consistent. The shrinkage rate of the wax part 1 and the shaping base 2 is consistent during the cooling process, which can keep the dimensions of the wax part 1 stable during the cooling process and prevent deformation, thereby improving the dimensional accuracy of the wax part 1.
[0021] At this point, since the shaping base 2 is also produced through a mold, the structural limitations and dimensional uniformity of the shaping base 2 itself can be avoided. The wax part 1 and the shaping base 2 are set one-to-one. Regardless of how irregular the wax part 1 is, as long as the shaping base 2 is designed to correspond to the wax part 1 during the molding mold design process, the shaping base 2 can be positioned to hold the wax part 1 during assembly and shaping after the wax part 1 and the shaping base 2 are produced. When the shaping base 2 and the wax part 1 are assembled and shaped, they become a single unit. Since the bottom of the shaping base 2 is flat, during the cooling process, when placed on a flat surface for cooling, the wax part 1 and the shaping base 2 have the same shrinkage rate. Therefore, the dimensional changes of the wax part 1 and the shaping base 2 are stable during the cooling process, and the overall shape will not deform.
[0022] The shaping base 2 is mainly used to support the easily deformable parts of the wax part 1. This support prevents these easily deformable parts from deforming under gravity, thus avoiding deformation of the wax part 1 due to gravity. Therefore, in this embodiment, the wax part 1 has an easily deformable portion 11 without bottom support, and the shaping base 2 has a support portion 3 located below the deformation direction of the easily deformable portion 11. Here, the easily deformable portion 11 refers to the part of the wax part 1 without bottom support. After the wax part 1 is produced, if the easily deformable portion 11 has no bottom support, it is very easy to deform under gravity. Therefore, the shaping base 2 has a support portion 3 below the easily deformable portion 11. This support portion 3 adds support to the lower part of the easily deformable portion 11, thus preventing it from deforming downwards.
[0023] The position of the support part 3 needs to be set according to the deformable part 11 of the wax part 1. At this time, the support part 3 is mainly to overcome the gravitational deformation of the deformable part 11 of the wax part 1 under the action of gravity. Therefore, the support part 3 is set on the lower side of the deformable part 11.
[0024] The shaping base 2 is placed under the wax part 1. During the cooling process, the shaping base 2 is placed in a flat position. Therefore, in order to ensure that the shaping base 2 and the wax part 1 will not deform due to gravity after assembly, in this embodiment, the shaping base 2 includes a base 21. The bottom of the base 21 is flat. The upper side of the base 21 is provided with a positioning groove 22 that matches the shape of the bottom of the wax part 1. The main body of the wax part 1 is positioned on the upper side of the shaping base 2 through the positioning groove 22. The lower side of the deformable part of the wax part 1 is supported by the side support part 331 and the bottom support part 332. The bottom of the base 21 is designed to be flat, meaning that the entire shaping base 2 is placed on a flat surface via the base 21. This ensures that the shaping base 2 and the wax part 1 on the upper side remain flat during the cooling process, preventing deformation due to gravity. On the upper side of the base 21 of the shaping base 2, there is a positioning groove 22 that matches the shape of the wax part 1. The shape of the positioning groove 22 is designed according to the shape of the wax part 1. When the wax part 1 is placed in the positioning groove 22 of the shaping base 2, part of the wax part 1 is located in the positioning groove 22, while the easily deformable part 11 is located on the upper side of the support part 3, thus completing the assembly of the wax part 1 and the shaping base 2. In this way, the positioning groove 22 can also be used to position the wax part 1 and support it, preventing deformation of the wax part 1.
[0025] The shaping base 2 is located on the lower side of the wax part 1. During the cooling process, it is also necessary to avoid the shaping base 2 from undergoing gravitational deformation. Therefore, in this embodiment, the bottom of the base 21 of the shaping base 2 is provided with an annular protrusion 23. The annular protrusion 23 is distributed along the edge of the shaping base 2. The bottom of the base 21 is also provided with longitudinally distributed dividing ribs 24 and transversely distributed dividing ribs 25 to divide the bottom of the base 21 into several independent spaces. Under the action of the transverse partition 25 and the longitudinal partition 24, the bottom of the shaping base 2 is divided into several independent spaces. The bottom heights of the annular protrusion 23, the transverse partition 25 and the longitudinal partition 24 are the same. In this way, the bottom of the shaping base 2 contacts the cooling platform through the annular protrusion 23, the transverse partition 25 and the longitudinal partition 24, which can ensure the flatness of the bottom of the shaping base 2 as a whole. At the same time, the annular protrusion 23, the transverse partition 25 and the longitudinal partition 24 can provide a certain distance between most of the shaping base 2 and the cooling platform, thereby improving the heat dissipation effect of the shaping base 2. In addition, after adding the transverse partition 25 and the longitudinal partition 24, the overall stability of the base 21 of the shaping base 2 can be improved, and the base 21 is less prone to deformation, thus ensuring that the wax part 1 is also less prone to deformation.
[0026] The support part 3 is used to support the deformable part 11. At this time, the deformable part 11 may be located at the middle of the connection of the wax part 1 (both ends of the deformable part 11 have special structures) or at the end of the wax part 1 (located at the end of the wax part 1, only one side is connected to the main body of the wax part 1). After being positioned by the positioning groove 22 of the shaping base 2, if the support part 3 is not provided, the deformable part 11 will be in a suspended state and will easily deform under the action of gravity. Support is required for different deformable parts. Therefore, in this embodiment, the support part 3 includes a side support part 331 and a bottom support part 332. The side support part 331 is located at the side of the wax part 1, and the bottom support part 332 is located at the bottom of the wax part 1. At this time, the side support part 331 is located at the middle of the connection of the wax part 1, and the bottom support part 332 is located at the end of the wax part 1, thereby supporting the deformable part 11 of the wax part 1.
[0027] Specifically, both the side support portion 331 and the bottom support portion 332 include a support body 33. The support body 33 extends upward from the base 21 of the shaping base 2. The side wall of the support body 33 is an inclined side wall 331 with a certain inclination angle. The top of the inclined side wall 331 is sealed to form a support top surface 332. The angle α between the inclined side wall 331 and the vertical axis is 1°-4°. In this application, the angle α between the inclined side wall 331 and the vertical axis is 2°. By setting the side wall of the support body 33 at an inclination, the inclined side wall 331 is provided with a draft angle. This facilitates demolding of the shaping base 2 after production. At the same time, it can improve the overall stability of the support body 33, enabling it to withstand greater pressure, and thus providing greater stability during the support of the easily deformable part 11.
[0028] For the support body 33, it can be designed as a solid or hollow structure depending on its actual size. Specifically, the support body 33 is a solid structure formed by the inclined sidewall 331 and the supporting top surface, or a hollow part with the bottom connected to the outside. When the support body 33 is small, it is not easy to design a hollow part inside, so the support body 33 is designed as a solid structure. However, when the support body 33 is large, if the entire support body 33 is made as a solid, the thickness of the support body 33 will be extremely large, which will not only affect the molding during the wax injection process, but also affect the cooling and heat dissipation of the shaping base 2 at that location.
[0029] The size of the support body 33 is determined based on the thickness relationship between the support body 33 and the corresponding deformable part 11 of the wax part 1. If the width at the top of the support body 33 is greater than or equal to 2.5 times the thickness of the wax part 1, it indicates that the support body 33 is large. In this case, the interior of the support body 33 needs to be set as a hollow part that communicates with the outside. If the width at the top of the support body 33 is less than 2.5 times the thickness of the wax part 1, the corresponding support body 33 is designed as a solid structure. This way, the support strength for the deformable part 11 can be guaranteed without affecting the molding process. At the same time, the heat dissipation will not be affected by the support body 33 being too thick.
[0030] At this time, the bottom support portion 332 is a hollow portion that connects the bottom of the support body 33 to the outside. In order to ensure that the bottom support portion 332 and the corresponding deformable portion 11 deform synchronously during the cooling process, the inclined sidewall 331, the support top surface 332, and the deformable portion 11 of the bottom support portion 332 have the same thickness. By setting the inclined sidewall 331 and the support top surface 332 to have the same thickness as the deformable portion 11 of the wax part 1, the shrinkage rate of the deformable portion 11 of the wax part 1 and the bottom support portion 332 of the shaping base 2 is the same during the cooling process, thereby maintaining the dimensional stability of the wax part 1 during the deformation process.
[0031] At this point, for positioning the edge of the deformable part 11 of the wax piece 1, in this embodiment, the top surface 332 of the bottom support 332 is provided with a top groove 333 adapted to the shape of the wax piece 1, and the middle of the top groove 333 is provided with a through hole 334 communicating with the hollow part of the support body 33. The top groove 333 is formed at the top position, and the overall shape of the top groove 333 is adapted to the shape of the deformable part 11, thereby positioning the side of the deformable part 11, which is convenient for positioning during the assembly process of the wax piece 1 and the shaping base 2. At the same time, when the size of the support top surface 332 is large, the middle of the top groove 333 of the support top surface 332 is provided with a through hole 334, which communicates with the hollow part of the support body 33, thereby increasing heat dissipation at this position and accelerating the cooling of the wax piece 1.
[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0033] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A method for shaping wax parts for irregularly shaped thin-walled pressure-bearing components, characterized in that, include The molding die design includes a first cavity for molding wax parts and a second cavity for molding a shaping base; In wax injection production, wax is injected into a molding die to form a wax part and a shaped base. For assembly and shaping, the wax part formed by wax injection and the shaping base are removed, and the wax part is placed on the shaping base to form an assembled whole. Cooling and separation: The entire assembly is placed on a cooling platform for cooling. After cooling, the wax part is removed from the top of the molding base.
2. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 1, characterized in that, The wax part has a deformable part with no bottom support, and the shaping base has a support part, which is located on the lower side of the deformable part in the deformation direction.
3. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 2, characterized in that, The shaping base includes a base with a flat bottom. The upper side of the base is provided with a positioning groove that matches the shape of the bottom of the wax piece. The main body of the wax piece is positioned on the upper side of the shaping base through the positioning groove. The lower side of the deformable part of the wax piece is supported by a side support and a bottom support.
4. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 3, characterized in that, The bottom of the shaping base is provided with an annular protrusion, which is distributed along the edge of the shaping base. The bottom of the base is also provided with longitudinal and transverse dividing ribs that are intersected to divide the bottom of the base into several independent spaces.
5. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 3, characterized in that, The support includes a side support and a bottom support. The side support is located on the side of the wax piece, and the bottom support is located at the bottom of the wax piece.
6. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 5, characterized in that, Both the side support and the bottom support include a support body. The support body extends upward from the base of the shaping base. The side wall of the support body is an inclined side wall with a certain inclination angle. The top of the inclined side wall is sealed to form a support top surface.
7. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 6, characterized in that, The supporting body is a solid formed by inclined sidewalls and a supporting top surface, or a hollow part with its bottom connected to the outside.
8. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 7, characterized in that, The inclined sidewalls, top surface, and deformable parts of the bottom support have the same thickness.
9. The wax shaping method for irregularly shaped thin-walled pressure-bearing components according to claim 8, characterized in that, The bottom support has a top groove on its top surface that matches the shape of the wax piece, and a through hole in the middle of the top groove that communicates with the hollow part of the support body.