Slender thin-wall blade module preparation system and preparation process

Abstract

The invention belongs to the technical field of turbine blade precision casting, and particularly relates to a slender thin-wall blade module preparation system and process. The pouring cup is communicated with one end of the middle pouring pipe pouring gate, the other end of the middle pouring pipe pouring gate is communicated with the blade crown flower disc pouring gate, the side wall of the middle pouring pipe pouring gate is communicated with the tenon disc pouring gate, and the tenon disc pouring gate and the blade crown flower disc pouring gate are communicated with the two ends of the blade wax mold respectively; the tenon disc pouring gate comprises a first inner ring disc and a plurality of first connecting rods; the inner ring of the first inner ring disc is communicated with the central casting pipe pouring gate, the outer ring of the first inner ring disc is communicated with one end of the first connecting rod, and the other end of the first connecting rod is communicated with the first outer ring disc; a tenon main body is arranged on one end face, facing the blade wax mold, of the first outer ring disc in a communicating manner; molten metal firstly fills the whole disc of the tenon disc pouring gate and then flows to the blade position, more molten metal flows into the blade crown disc pouring gate through the middle pouring pipe pouring gate, and bottom pouring in the preparation system is dominant.

Description

Technical Field

[0001] The present invention belongs to the technical field of precision casting of turbine blades, and in particular relates to a system and process for preparing a slender thin-walled blade module. Background Art

[0002] The working blades of aircraft engine power turbines are generally slender and thin-walled structures. The blade body has long compensation channels and is very easy to deform, making it difficult to control metallurgical defects and dimensions.

[0003] The wax mold preparation process for equiaxed crystal slender thin-walled blades in the early stage adopted a module process with 6 pieces / group and an inner gate on the blade body; the connection area between the inner gate of the blade body and the slender thin-walled blade body is the area with higher temperature in the whole blade during the solidification process, and it is also the area of ​​post-solidification, so it is easy to form loose defects, and the grain size will be relatively coarse, and the solidification shrinkage of the inner gate will cause blade deformation. The average qualified rate of various castings produced under this module process is about 60%. The main problem is that the runner in the blade body will cause fluorescence display defects near the surface of the blade and the blade size is out of tolerance. At the same time, the production efficiency of the 6-piece / group module process is low, and the utilization rate of the alloy is only about 10%.

[0004] The current aero-engine blade manufacturing field urgently needs a module process that can improve the production efficiency and pass rate of equiaxed crystal slender thin-walled blades while reducing costs. Summary of the invention

[0005] In view of the above problems, the present invention proposes a system for preparing a slender thin-walled blade module, including a pouring cup and a center pouring pipe runner; the pouring cup is connected to one end of the center pouring pipe runner, the other end of the center pouring pipe runner is connected to the leaf crown disk runner, the position near the pouring cup on the side wall of the center pouring pipe runner is connected to the tenon disk runner, and multiple groups of blade wax molds are evenly distributed in a circular shape on the periphery of the center pouring pipe runner; the tenon disk runner and the leaf crown disk runner are respectively connected to the two ends of the blade wax mold; The tenon disc runner includes an inner ring disc No. 1 and multiple connecting rods No. 1; the inner ring of the inner ring disc No. 1 is connected to the center injection pipe runner, the outer ring of the inner ring disc No. 1 is connected to one end of the connecting rod No. 1, and the other end of the connecting rod No. 1 is connected to the outer ring disc No. 1; a tenon body is provided on the end surface of the outer ring disc No. 1 facing the blade wax mold.

[0006] Furthermore, the leaf crown disc runner includes a No. 2 inner ring disc and multiple No. 2 connecting rods; the inner ring of the No. 2 inner ring disc is connected to the center injection pipe runner, and the outer ring of the No. 2 inner ring disc is connected to the No. 2 connecting rod; each of the No. 2 connecting rods is connected to a leaf crown body at one end away from the No. 2 inner ring disc.

[0007] Furthermore, the No. 1 connecting rod is a trapezoidal body, and the No. 1 connecting rod is connected to the two tenon bodies at two corners facing the tenon body respectively.

[0008] Furthermore, one end of the No. 1 connecting rod with a larger width is connected to the No. 1 outer ring disk.

[0009] Furthermore, a positioning mark is provided on the blade crown body; and a raised mark is provided on the tenon disc runner at a position corresponding to the mark on the blade crown body.

[0010] Furthermore, the inner rings of the No. 1 inner ring disk and the No. 2 inner ring disk are square; one side corner of the square is arc-shaped.

[0011] Furthermore, the center injection pipe runner includes a No. 1 connector and a No. 2 connector; one end of the No. 1 connector is connected to the pouring cup, and the other end of the No. 1 connector is connected to the No. 3 connector; the No. 2 connector is connected to the crown disk runner; a No. 1 tube body, a No. 2 tube body and a No. 3 tube body are arranged in sequence between the No. 3 connector and the No. 2 connector; the No. 1 tube body is a truncated cone body, and the end of the No. 1 tube body with a larger inner diameter is connected to the No. 1 connector.

[0012] Furthermore, boss bodies are provided between the first tube body and the second tube body and between the second tube body and the third tube body.

[0013] The present invention provides a slender thin-walled blade module manufacturing process, which is applied to any of the above-mentioned slender thin-walled blade module manufacturing systems, and specifically comprises the following steps: The wax model combination scheme model of the module is designed using modeling software; The leaf crown runner adopts the leaf crown flower plate runner to be connected with the leaf wax mold; The tenon runner adopts a tenon disc runner to communicate with the blade wax model; The center injection pipe runner is connected to the pouring cup by a No. 1 connector, the No. 2 connector is connected to the crown disk runner, and the No. 3 connector is connected to the tenon disk runner; Use numerical simulation software to simulate the defects and stress distribution of module combination solutions; Prepare wax mold runner mold according to the wax mold combination scheme model; A wax mold runner is pressed by using a wax mold runner mold and the wax mold is combined with the blade wax mold; Subsequently, mold shell preparation, smelting and pouring are carried out to complete the preparation of the blade casting.

[0014] Furthermore, the wax mold runner mold prepared according to the wax mold combination scheme model includes a center injection tube runner mold, a tenon disc runner mold and a crown disk runner mold.

[0015] Beneficial Effects The beneficial effects of the present invention compared to the prior art are as follows: 1. In the present application, the tenon runner adopts the disk structure of the tenon disc runner, so that the molten metal first fills the entire disk of the tenon disc runner before flowing to the blade position. The molten metal will flow more to the crown disc runner through the center injection pipe runner, so that the bottom injection occupies a dominant position in the preparation system.

[0016] 2. In the present application, the No. 1 tube body is used as a transition gradient in the center pouring tube runner, so that the flow rate of molten metal flowing through the center pouring tube runner during the pouring process is increased, the amount of metal poured at the bottom is increased, and the bottom pouring is further dominated, thereby optimizing the temperature gradient during the solidification process of the blade and improving the metallurgical quality of the blade.

[0017] 3. The present application adds positioning marks on the crown disc runner and convex marks on the tenon disc runner to ensure that blades with the same serial numbers in different modules are at the same position in the preheating furnace and the pouring furnace during the pouring process, thereby ensuring the consistency of the modules and facilitating the control of variables in the subsequent metallurgical defect analysis process.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a module in an embodiment of the present invention is shown.

[0021] Figure 2 A schematic diagram of the three-dimensional structure of the tenon disc runner in an embodiment of the present invention is shown.

[0022] Figure 3 A top view of one side of the tenon disc runner in an embodiment of the present invention is shown.

[0023] Figure 4 A top view of the other side of the tenon disc runner in the embodiment of the present invention is shown.

[0024] Figure 5 A schematic diagram of the three-dimensional structure of the crown flower disk runner in an embodiment of the present invention is shown.

[0025] Figure 6 A top view of a runner side of a crown flower disc in an embodiment of the present invention is shown.

[0026] Figure 7 A top view of another side of the runner of the crown faceplate in an embodiment of the present invention is shown.

[0027] Figure 8 A top view of a center injection tube runner in an embodiment of the present invention is shown.

[0028] In the figure, 1, pouring cup; 2, center injection tube runner; 21, connector No. 1; 22, tube body No. 1; 23, tube body No. 2; 24, tube body No. 3; 25, connector No. 2; 26, connector No. 3; 27, boss body; 3, crown disc runner; 31, inner ring disc No. 2; 32, connecting rod No. 2; 33, crown body; 331, positioning mark; 4, tenon disc runner; 41, inner ring disc No. 1; 42, connecting rod No. 1; 43, tenon body; 44, outer ring disc No. 1; 45, raised mark; 5, blade wax mold. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present application provides a system for preparing a slender thin-walled blade module, referring to Figure 1 , including a pouring cup 1 and a center pouring pipe runner 2; the pouring cup 1 is connected to one end of the center pouring pipe runner 2, the other end of the center pouring pipe runner 2 is connected to the leaf crown disk runner 3, and the middle of the center pouring pipe runner 2 near the pouring cup 1 is connected to the tenon disk runner 4; the tenon disk runner 4 and the leaf crown disk runner 3 are respectively connected to the two ends of the blade wax mold 5; refer to Figure 2 , Figure 3 and Figure 4 The tenon disc runner 4 includes a No. 1 inner ring disc 41 and a plurality of No. 1 connecting rods 42; the inner ring of the No. 1 inner ring disc 41 is connected to the center injection pipe runner 2, and the outer ring of the No. 1 inner ring disc 41 is connected to the No. 1 connecting rod 42; the No. 1 connecting rod 42 is connected to the No. 1 outer ring disc 44, and the No. 1 outer ring disc 44 is connected to the tenon body 43.

[0031] refer to Figure 5 , Figure 6 and Figure 7The blade crown disc runner 3 includes a No. 2 inner ring disc 31 and a plurality of No. 2 connecting rods 32; the inner ring of the No. 2 inner ring disc 31 is connected to the center injection pipe runner 2, and the outer ring of the No. 2 inner ring disc 31 is connected to the No. 2 connecting rod 32; each of the No. 2 connecting rods 32 is respectively connected to the blade crown body 33.

[0032] During the implementation process, the blade wax mold 5 is distributed in a circular shape, with the air inlet edge of the blade wax mold 5 facing outward and the exhaust edge facing the inner center injection pipe runner 2; the module structure is illustrated by taking 12 pieces / group as an example; the height of the entire module is 439mm, the maximum diameter of the top is 289mm, and the maximum diameter of the pouring cup 1 is 178mm; 12 cylindrical No. 2 connecting rods 32 are individually connected to the blade crown body 33; the diameter of each connecting rod is 15mm and the length is 45mm; the No. 2 connecting rods 32 are evenly distributed, and the angle between two adjacent No. 2 connecting rods 32 is 30°; the No. 2 inner ring disk 31 is connected to the center injection pipe runner 2 through a square notch, and the No. 1 inner ring disk 41 is also connected to the center injection pipe runner 2 through a square notch, and the maximum diameter of the blade crown flower plate runner 3 is 289mm; During the module assembly process, the pouring cup 1 is facing downward for support, and then the center injection tube runner 2, the tenon disc runner 4, the blade wax mold 5 and the leaf crown disc runner 3 are installed; during the pouring process, the pouring cup 1 is facing upward; the molten metal flows into the center injection tube runner 2 through the pouring cup 1, and the molten metal is divided in the center injection tube runner 2, with part of the molten metal flowing into the tenon disc runner 4, and the other part continues to flow into the leaf crown disc runner 3 through the center injection tube runner 2.

[0033] In the prior art, during the pouring process of the tenon pouring channel, the molten metal will quickly pass through the tenon pouring channel runner to the position of the blade wax mold 5, and the top pouring is dominant; in the present application, the molten metal flows into the No. 1 inner ring disk 41 through the center pouring pipe pouring channel 2, and then flows into the No. 1 outer ring disk 44 through the No. 1 connecting rod 42. The molten metal will flow into the blade wax mold 5 position through the tenon body 43 only after the No. 1 outer ring disk 44 is filled. More molten metal will pass through the center pouring pipe pouring channel 2 runner to the position of the leaf crown flower disc pouring channel 3; after passing through the No. 2 inner ring disk 31 and the No. 2 connecting rod 32 in the leaf crown flower disc pouring channel 3, it will flow to the blade wax mold 5 position through the leaf crown body 33, so that the bottom pouring and top pouring are combined in the entire preparation system, and the bottom pouring is dominant.

[0034] The connecting rod in the prior art has a larger connection area, while the second connecting rod 32 in the present application is an elongated cylindrical shape and has a smaller connection area. Therefore, the shrinkage stress acting on the blade crown body 33 during the solidification process is smaller, which is beneficial to controlling the deformation of the blade crown body 33.

[0035] The crown disc runner 3, the tenon disc runner 4 and the center injection tube runner 2 are placed using special tooling for more than twenty-four hours. The crown disc runner 3, the tenon disc runner 4 and the center injection tube runner 2 fully shrink to release stress and reduce deformation during the placement process, thereby preventing stress generated during the assembly process from being transferred to the blade wax mold 5 and causing deformation of the blade wax mold 5.

[0036] The present application adopts the disc structure of the tenon disc runner 4 for the tenon runner, so that the molten metal first fills the entire disc of the tenon disc runner 4 before flowing to the blade position, and the molten metal will flow more to the crown disc runner 3 through the center injection pipe runner 2, so that the heavy bottom injection of the preparation system occupies a dominant position; the wax mold module set is expanded to 12 pieces / group, which improves the production efficiency and alloy utilization rate and greatly reduces the production cost.

[0037] The present application cancels the blade body endogate, and the blade wax mold 5 is distributed in a circular shape, which simplifies the difficulty of mold assembly and reduces the workload of mold assembly; canceling the endogate can avoid metallurgical quality and dimensional tolerance problems, and greatly improves the qualified rate of castings; In one embodiment of the present invention, the No. 1 connecting rod 42 is a trapezoidal body, and the two corners of the No. 1 connecting rod 42 facing the tenon body 43 are respectively connected to the two tenon bodies 43 .

[0038] The end with a larger width at both ends of the No. 1 connecting rod 42 is connected to the No. 1 outer ring disk 44 .

[0039] The ring-shaped interconnection is achieved by setting a trapezoidal No. 1 connecting rod 42, which is connected to the No. 1 inner ring disk 41 and the No. 1 outer ring disk 44; the module of 12 groups of blade wax molds 5 contains 6 groups of No. 1 connecting rods 42; the width of the No. 1 outer ring disk 44 is 47㎜, and the maximum diameter is 274㎜; the width of the No. 1 connecting rod 42 evenly transitions from 35㎜ to 21mm.

[0040] In one embodiment of the present invention, a positioning mark 331 is disposed on the blade crown body 33 .

[0041] The tenon circular disk runner 4 is provided with a raised mark 45 at a position corresponding to the mark of the blade crown body 33 .

[0042] The inner circles of the first inner ring disk 41 and the second inner ring disk 31 are square; one corner of the square is arc-shaped.

[0043] During the implementation process, positioning marks 331 of 1, 4, 7 and 10 are respectively set on the 12 blade crown bodies 33; this can ensure that blades with the same serial number in different modules are in the same position during the assembly process; at the same time, a semi-spherical raised mark 45 is added to the position corresponding to the blade crown body 33 marked with 1 on the tenon disc runner 4, and the arc-shaped error-proofing design on the No. 1 inner ring disk 41 and the No. 2 inner ring disk 31 can ensure that blades with the same serial number in different modules are in the same position in the preheating furnace and the pouring furnace during the casting process; thereby ensuring the consistency of the modules and facilitating the control of variables in the subsequent metallurgical defect analysis process.

[0044] In one embodiment of the present invention, reference Figure 8 The center injection pipe runner 2 includes a No. 1 connector 21 and a No. 2 connector 25; one end of the No. 1 connector 21 is connected to the pouring cup 1, and the other end of the No. 1 connector 21 is connected to the No. 3 connector 26; the No. 2 connector 25 is connected to the crown disk runner 3; a No. 1 tube body 22, a No. 2 tube body 23 and a No. 3 tube body 24 are arranged between the No. 3 connector 26 and the No. 2 connector 25 in sequence; the No. 1 tube body 22 is a truncated cone body, and the end of the No. 1 tube body 22 with a larger inner diameter is connected to the No. 1 connector 21.

[0045] In one embodiment of the present invention, bosses 27 are disposed between the first tube body 22 and the second tube body 23 and between the second tube body 23 and the third tube body 24 .

[0046] During the implementation process, the length of the center injection pipe is 388mm and the maximum diameter is 101mm; the No. 1 connector 21 is connected to the pouring cup 1; the No. 2 connector 25 and the No. 3 connector 26 are provided with channels, so that the molten metal inside the center injection pipe runner 2 flows into the leaf crown disc runner 3 and the tenon disc runner 4 through the No. 2 connector 25 and the No. 3 connector 26 respectively; the middle part of the center injection pipe runner 2 is divided into three sections, namely the No. 1 tube body 22, the No. 2 tube body 23 and the No. 3 tube body 24; the diameter of the No. 1 tube body 22 is uniformly transitioned from 39mm near one end of the pouring cup 1 to 30mm; the diameters of the No. 2 tube body 23 and the No. 3 tube body 24 are both 30mm; the diameter of the boss body 27 is 38mm, and the design of the boss body 27 The arrangement improves the strength of the center pouring pipe runner 2 and reduces the deformation of the center pouring pipe runner 2; compared with the prior art, the diameter of the center pouring pipe runner 2 is increased by 15-25 mm, and the first tube body 22 is used as a transition gradient near the pouring cup 1, so that the flow rate of the molten metal flowing through the center pouring pipe runner 2 during the pouring process is increased, and the amount of metal poured at the bottom is increased, which further makes the bottom pouring dominant in the preparation system; thereby optimizing the temperature gradient during the solidification process of the blade, which is more conducive to the loose shrinkage compensation of the thinner wall thickness position of the blade body during the solidification process of the slender thin-walled blade, the number of scrapped blades due to conveying defects is significantly reduced, the metallurgical quality of the blade is greatly improved, and the average qualified rate reaches more than 70%.

[0047] The present application provides a slender thin-walled blade module preparation process, which is applied to any of the above-mentioned slender thin-walled blade module preparation systems, and specifically includes the following steps: The wax model combination scheme model of the module is designed using modeling software; The leaf crown runner adopts the leaf crown flower plate runner 3 to be connected with the leaf wax mold 5; The tenon runner adopts a tenon disc runner 4 to communicate with the blade wax mold 5; The center injection pipe runner 2 is connected to the pouring cup 1 by a No. 1 connector 21, the No. 2 connector 25 is connected to the leaf crown disk runner 3, and the No. 3 connector 26 is connected to the tenon disk runner 4; The defects and stress distribution of the module combination scheme are simulated by using numerical simulation software; and the model is further optimized to avoid the occurrence of defect accumulation areas and stress concentration areas on the blade wax model 5; Prepare wax mold runner molds according to the wax mold combination scheme model; there are three sets of wax mold runner molds, including center injection tube runner mold, tenon disc runner mold and crown flower disc runner mold; wax mold runner molds can ensure smooth and complete pressing of the runner wax mold while ensuring the convenience of operation; A wax mold runner is pressed using a wax mold runner mold and the wax mold is combined with the blade wax mold 5; Subsequently, mold shell preparation, smelting and pouring are carried out to complete the preparation of the blade casting.

[0048] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for preparing a slender thin-walled blade module, characterized in that: The invention comprises a pouring cup (1) and a center pouring pipe runner (2); the pouring cup (1) is connected to one end of the center pouring pipe runner (2), the other end of the center pouring pipe runner (2) is connected to a leaf crown disk runner (3), a position on the side wall of the center pouring pipe runner (2) close to the pouring cup (1) is connected to a tenon disk runner (4), and a plurality of groups of leaf wax molds (5) are evenly distributed in a circular shape around the periphery of the center pouring pipe runner (2); the tenon disk runner (4) and the leaf crown disk runner (3) are respectively connected to two ends of the leaf wax mold (5); The tenon disc runner (4) comprises a No. 1 inner ring disc (41) and a plurality of No. 1 connecting rods (42); the inner ring of the No. 1 inner ring disc (41) is connected to the center injection pipe runner (2), the outer ring of the No. 1 inner ring disc (41) is connected to one end of the No. 1 connecting rod (42), and the other end of the No. 1 connecting rod (42) is connected to the No. 1 outer ring disc (44); and a tenon body (43) is provided on one end surface of the No. 1 outer ring disc (44) facing the blade wax mold (5).

2. A slender thin-walled blade module preparation system according to claim 1, characterized in that: The leaf crown flower disc runner (3) comprises a No. 2 inner ring disc (31) and a plurality of No. 2 connecting rods (32); the inner ring of the No. 2 inner ring disc (31) is connected to the center injection pipe runner (2), and the outer ring of the No. 2 inner ring disc (31) is connected to the No. 2 connecting rods (32); and each No. 2 connecting rod (32) is connected to a leaf crown body (33) at one end away from the No. 2 inner ring disc (31).

3. A slender thin-walled blade module preparation system according to claim 2, characterized in that: The No. 1 connecting rod (42) is a trapezoidal body, and the two side corners of the No. 1 connecting rod (42) facing the tenon body (43) are respectively connected to the two tenon bodies (43).

4. A slender thin-walled blade module preparation system according to claim 3, characterized in that: The end with the larger width at both ends of the No. 1 connecting rod (42) is in communication with the No. 1 outer ring disc (44).

5. A slender thin-walled blade module preparation system according to claim 4, characterized in that: The blade crown body (33) is provided with a positioning mark (331); the tenon disc runner (4) is provided with a raised mark (45) at a position corresponding to the mark on the blade crown body (33).

6. A system for preparing a slender thin-walled blade module according to claim 5, characterized in that: The inner rings of the first inner ring disc (41) and the second inner ring disc (31) are square; one side corner of the square is arc-shaped.

7. A system for preparing a slender thin-walled blade module according to claim 6, characterized in that: The center injection pipe runner (2) comprises a No. 1 connector (21) and a No. 2 connector (25); one end of the No. 1 connector (21) is connected to the pouring cup (1), and the other end of the No. 1 connector (21) is connected to the No. 3 connector (26); the No. 2 connector (25) is connected to the crown flower plate runner (3); a No. 1 tube body (22), a No. 2 tube body (23) and a No. 3 tube body (24) are arranged in sequence between the No. 3 connector (26) and the No. 2 connector (25); the No. 1 tube body (22) is a truncated cone, and the end of the No. 1 tube body (22) with a larger inner diameter is connected to the No. 1 connector (21).

8. A system for preparing a slender thin-walled blade module according to claim 7, characterized in that: A boss body (27) is provided between the first tube body (22) and the second tube body (23) and between the second tube body (23) and the third tube body (24).

9. A process for preparing a slender thin-walled blade module, applied to a system for preparing a slender thin-walled blade module as claimed in any one of claims 1 to 8, characterized in that: The specific steps include: The wax model combination scheme model of the module is designed using modeling software; The leaf crown runner adopts the leaf crown flower plate runner (3) to be connected with the leaf wax mold (5); The tenon runner adopts a tenon disc runner (4) to communicate with the blade wax mold (5); The center injection pipe runner (2) is connected to the pouring cup (1) by a No. 1 connector (21), the No. 2 connector (25) is connected to the leaf crown disk runner (3), and the No. 3 connector (26) is connected to the tenon disk runner (4); Use numerical simulation software to simulate the defects and stress distribution of module combination solutions; Prepare wax mold runner mold according to the wax mold combination scheme model; A wax mold runner is pressed using a wax mold runner mold and the wax mold is combined with a blade wax mold (5) to form a wax mold; Subsequently, mold shell preparation, smelting and pouring are carried out to complete the preparation of the blade casting.

10. A process for preparing a slender thin-walled blade module according to claim 9, characterized in that: The wax mold runner mold prepared according to the wax mold combination scheme model includes a center injection pipe runner mold, a tenon disc runner mold and a crown disc runner mold.

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