A disc type integrated runner tool
The disc-type integrated gating fixture, designed with locating pins and locking bolts, solves the problems of cumbersome welding and poor dimensional consistency in existing gating systems, enabling efficient and convenient gating fabrication and high-quality casting production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENYANG ZHONGKE SANNAI NEW MATERIALS CO LTD
- Filing Date
- 2026-07-01
- Publication Date
- 2026-08-04
AI Technical Summary
Existing disc-type gating systems suffer from problems such as cumbersome welding operations, insufficient adjustment flexibility, poor dimensional consistency, low production efficiency, and high costs in the investment casting of turbine guide vanes for aero-engines.
The design employs multiple sets of positioning pins and locking bolts to achieve integrated molding of the inner runner, upper and lower disc runners, and central column tube, eliminating welding. Through a modular slider structure and a central column tube size adjustment mechanism, dimensional consistency and stability are ensured, adapting to the production needs of turbine guide vanes of different specifications.
It simplifies the gating process, reduces manual labor intensity, improves production efficiency and casting quality, reduces mold development costs, and meets the quality standards for high-end precision castings.
Smart Images
Figure CN224586927U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of investment casting technology, specifically a disc-type integrated gating tool. Background Technology
[0002] Currently, in the field of investment casting for aero-engine turbine guide vanes, gating systems are mainly divided into top-pour gating systems and bottom-pour gating systems. Bottom-pour gating systems are further divided into "I"-shaped gating systems and disc-type gating systems. The disc-type gating system mainly consists of an upper disc, a central column, and a bottom disc gating system. Typically, the upper disc, central column, and bottom disc gating system are connected together by welding. Then, the blade wax model is welded to the ingate and subsequently to the disc-type gating system. This type of assembled gating system has the following technical drawbacks in practical applications: Firstly, the welding and assembly of the gating system is cumbersome and lacks flexibility in adjustment. During the assembly process, the dispersed gating systems need to be welded and assembled, and the ingate needs to be welded separately to the casting wax model before being assembled with the gating system. The process is complicated, prone to misalignment and displacement, and has high labor intensity and low production efficiency.
[0003] Secondly, the surface of the welding area of the wax mold is not easy to be flat and the corners are small, which can easily lead to welding defects, affect the quality of the mold shell, and cause slag inclusion defects in the casting.
[0004] Third, special gating molds need to be designed and manufactured separately for different types of castings. A single-specification gating system can only be applied to a single type of casting, resulting in high investment costs for gating molds.
[0005] While existing gating systems exist, they cannot simultaneously accommodate the upper disc, middle column tube, bottom disc, and gating inlet system. Furthermore, modular gating systems often suffer from insufficient consistency and dimensional deviations, and their flow stabilization and slag removal effects during molten steel pouring are limited, making it difficult to meet the stringent requirements of high-end precision castings. Therefore, how to provide an integrated gating system for investment casting that is dimensionally adjustable, highly versatile, stable in the filling process, and easy to assemble and disassemble has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] The purpose of this invention is to provide a disc-type integrated gating fixture to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a disc-type integrated gating fixture, wherein a wax injection hole is provided on the side of the disc-type integrated gating fixture, the disc-type integrated gating fixture includes: a central column tube; a first locking bolt; a second locking bolt; a first positioning pin; a second positioning pin; a third positioning pin; a slider for the central column tube fixture, wherein two sliders of the central column tube fixture are provided, and the two sliders of the central column tube fixture are coaxially positioned and connected by the first positioning pin; and a slider for the upper disc gating fixture, wherein the slider of the upper disc gating fixture is positioned by the second positioning pin. The upper end of the slider of the central column tube fixture is locked by the first locking bolt; the slider of the lower disc sprue fixture is positioned at the lower end of the slider of the central column tube fixture by the third positioning pin and locked by the second locking bolt; the inner sprue slider assembly is disposed between the lower end of the slider of the central column tube fixture and the slider of the lower disc sprue fixture; the central column tube size adjustment mechanism is detachably installed between the sliders of the two central column tube fixtures for adjusting the length of the central column tube.
[0008] Preferably, the lower end face of the slider of the upper disc sprue fixture is in close contact with the upper end face of the slider of the middle column tube fixture, the second positioning pin penetrates vertically through the slider of the upper disc sprue fixture and is inserted into the positioning hole of the slider of the middle column tube fixture, and the first locking bolt is arranged axially to fasten the slider of the upper disc sprue fixture to the slider of the middle column tube fixture.
[0009] Preferably, the ingate slider assembly includes: a sliding slider for the ingate of the lower disk; a fixed slider for the ingate of the lower disk; the upper end face of the sliding slider of the ingate of the lower disk is in contact with the lower end face of the slider of the central column tooling, and the lower end face of the sliding slider of the ingate of the lower disk is in contact with the upper end face of the slider of the ingate tooling of the lower disk; the fixed slider of the ingate of the lower disk is fixedly installed on the slider of the ingate tooling of the lower disk, and the fixed slider of the ingate of the lower disk and the sliding slider of the ingate of the lower disk cooperate to form the forming cavity of the ingate of the lower disk.
[0010] Preferably, the central column tube size adjustment mechanism includes: a fourth positioning pin; a third locking bolt; and a central column tube size adjustment slider. The upper and lower end faces of the central column tube size adjustment slider are respectively in close contact with the end faces of the sliders of the two central column tube fixtures. The central column tube size adjustment slider is coaxially positioned by the fourth positioning pin. The central column tube size adjustment slider is fastened to the sliders of the two central column tube fixtures by four circumferentially distributed third locking bolts.
[0011] Preferably, the mating surface between the sliding block of the inner sprue of the lower disk and the fixed block of the inner sprue of the lower disk is an inclined surface, and the slider of the sprue fixture of the lower disk, together with the sliding block of the inner sprue of the lower disk and the fixed block of the inner sprue of the lower disk, together form the forming cavity of the sprue of the lower disk.
[0012] Preferably, the wax injection hole is located at the side center of the slider of the gating fixture of the upper disc, and the wax injection hole is connected to the molding cavity. The molding cavity includes an integral gating cavity consisting of the gating of the upper disc, the central column tube, the gating of the lower disc, and the inner gating of the lower disc.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This disc-type integrated gating fixture has the following advantages: Positioning and locking are achieved through multiple sets of locating pins and locking bolts, replacing the traditional multi-stage welding. The inner sprue, upper and lower disc sprues, and central column tube are integrally formed, eliminating the need for separate welding of the inner sprue and wax mold assembly. There is no risk of misalignment or displacement during the assembly process, and the disassembly and assembly operations are simple and quick, reducing manual labor intensity and improving the production efficiency of sprue manufacturing and module assembly. At the same time, it can ensure the dimensional consistency and stability of the integrated sprue, which is suitable for the high-efficiency production requirements of aero-engine blade casting.
[0014] The secondary welding process between the wax mold and the sprue is eliminated, thus removing welding defects caused by uneven surfaces and excessively small corners at the welding points. The one-piece molded sprue has a smooth and regular surface, effectively avoiding the adverse effects of welding defects on the quality of the shell. It also prevents defects such as slag inclusions and porosity in the casting caused by welding problems, improves the surface quality and internal integrity of the casting, and meets the quality standards of high-end precision castings such as turbine guide vanes for aero-engines.
[0015] The length of the central column tube can be flexibly adjusted by adjusting the slider of the central column tube size. One set of tooling can be compatible with the production needs of turbine guide vanes of different specifications, reducing mold research and development and production costs, shortening the production preparation time for product changeover, improving the universality and adaptability of the gating tooling, and reducing the enterprise's production investment. Attached Figure Description
[0016] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Side sectional view; Figure 3This is a cross-sectional view of the upper circular tooling structure in the present invention. Figure 4 for Figure 3 Side sectional view; Figure 5 This is a cross-sectional view of the lower disc tooling structure in the present invention. Figure 6 for Figure 5 Side sectional view; Figure 7 This is a cross-sectional view of the slider for adjusting the size of the central column tube in the structure of this utility model; Figure 8 for Figure 7 Side view; Figure 9 This is a schematic diagram of the integrated gating cavity in the structure of this utility model.
[0018] In the diagram: 1. Sprue of the upper disc; 2. Middle column tube; 3. Sprue of the lower disc; 4. Inner sprue of the lower disc; 5. First locking bolt; 6. Slider of the upper disc sprue fixture; 7. Slider of the middle column tube fixture; 8. Adjusting slider for the size of the middle column tube; 9. Wax injection hole; 10. Sliding slider of the lower disc inner sprue; 11. Slider of the lower disc sprue fixture; 12. Second locking bolt; 13. First locating pin; 14. Second locating pin; 15. Fixed slider of the lower disc inner sprue; 16. Third locating pin; 17. Third locking bolt; 18. Fourth locating pin. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figures 1 to 9This utility model provides a technical solution: a disc-type integrated gating fixture, wherein the disc-type integrated gating fixture has a wax injection hole 9 on its side. The disc-type integrated gating fixture includes: a central column tube 2, a first locking bolt 5, a second locking bolt 12, a first positioning pin 13, a second positioning pin 14, a third positioning pin 16, and two sliders 7 of the central column tube fixture. The two sliders 7 of the central column tube fixture are coaxially positioned and connected by the first positioning pin 13. The slider 6 of the upper disc gating fixture is positioned by the second positioning pin 14. The upper end of the slider 7 of the central column tube fixture is locked by the first locking bolt 5. The slider 11 of the lower disc sprue fixture is positioned at the lower end of the slider 7 of the central column tube fixture by the third positioning pin 16 and locked by the second locking bolt 12. The inner sprue slider assembly is set between the lower end of the slider 7 of the central column tube fixture and the slider 11 of the lower disc sprue fixture. The central column tube size adjustment mechanism is detachably installed between the sliders 7 of the two central column tube fixtures and is used to adjust the length of the central column tube 2.
[0021] In the specific implementation process, it is worth noting that the material of the central column tube 2 is high-strength, high-temperature resistant alloy steel to ensure stable shape and dimensional accuracy during high-temperature wax injection and subsequent processes, providing reliable structural support for the entire integrated gating system. The first locking bolt 5 is a high-strength bolt with high thread precision, capable of withstanding large locking forces, ensuring that the slider 6 of the upper disc gating fixture and the slider 7 of the central column tube fixture will not loosen after locking, ensuring the sealing and stability of the molding cavity. The second locking bolt 12 is also a high-strength bolt, its function being to firmly lock the slider 11 of the lower disc gating fixture and the slider 7 of the central column tube fixture, ensuring the stability of the lower disc gating system. To ensure the precision of the cavity forming process, the first positioning pin 13 is cylindrical and made of high-quality carbon steel. It can accurately achieve the coaxial positioning of the sliders 7 of the two central column tube fixtures, ensuring the coaxiality of the central column tube 2. The second positioning pin 14 is also cylindrical and made of the same material as the first positioning pin 13. It vertically penetrates the slider 6 of the upper disc's gating fixture and is inserted into the positioning hole of the slider 7 of the central column tube fixture, achieving radial and circumferential positioning of the slider 6 of the upper disc's gating fixture. The third positioning pin 16 is used for positioning the slider 11 of the lower disc's gating fixture and the slider 7 of the central column tube fixture. The surface of the slider 7 of the central column tube fixture is precision ground to ensure that the mating surface with the adjacent slider is flat and smooth, reducing assembly errors.
[0022] Furthermore, the lower end face of the slide block 6 of the upper disc sprue fixture is closely fitted with the upper end face of the slide block 7 of the middle column fixture. The second positioning pin 14 vertically penetrates the slide block 6 of the upper disc sprue fixture and is inserted into the positioning hole of the slide block 7 of the middle column fixture. The first locking bolt 5 is set along the axial direction to fasten the slide block 6 of the upper disc sprue fixture to the slide block 7 of the middle column fixture.
[0023] In the specific implementation process, it is worth noting that the slider 6 of the upper disc sprue fixture has a cavity inside that matches the shape of the upper disc sprue 1. The surface of the cavity is polished to ensure that the wax material can be smoothly formed after injection and that the surface quality is good. The second positioning pin 14 is fitted with the positioning holes of the slider 6 of the upper disc sprue fixture and the slider 7 of the middle column tube fixture with clearance, which can ensure that the positioning pin can be smoothly inserted and that the positioning accuracy is guaranteed. During the tightening process, the first locking bolt 5 is tightened with a torque wrench according to the specified torque value to ensure that the locking force is uniform and consistent, and to prevent the slider from deforming or loosening due to excessive or insufficient locking force.
[0024] Furthermore, the ingate slider assembly includes: a sliding slider 10 for the ingate of the lower disc, a fixed slider 15 for the ingate of the lower disc, the upper end face of the sliding slider 10 for the ingate of the lower disc being in contact with the lower end face of the slider 7 of the central column tooling, the lower end face of the sliding slider 10 for the ingate of the lower disc being in contact with the upper end face of the slider 11 of the ingate tooling of the lower disc, and the fixed slider 15 for the ingate of the lower disc being fixedly installed on the slider 11 of the ingate tooling of the lower disc. The fixed slider 15 for the ingate of the lower disc and the sliding slider 10 for the ingate of the lower disc cooperate to form the molding cavity of the ingate 4 of the lower disc.
[0025] In the specific implementation process, it is worth noting that the sliding slider 10 of the inner sprue of the lower disc is made of alloy material, which has a certain wear resistance and excellent smoothness to reduce frictional resistance during sliding and ensure smooth sliding. It forms a good sealing effect between the mating surface of the sliding slider 10 and the fixed slider 15 of the inner sprue of the lower disc. The fixed slider 15 of the inner sprue of the lower disc is fixed to the slider 11 of the sprue tooling of the lower disc by bolts, which can prevent the fixed slider from loosening due to vibration during the wax injection process. The forming cavity of the inner sprue 4 of the lower disc formed by the cooperation of the fixed slider 15 and the sliding slider 10 of the inner sprue of the lower disc is processed with strict dimensional accuracy according to the requirements to ensure that the dimensions of the inner sprue meet the process requirements.
[0026] Furthermore, the central column tube size adjustment mechanism includes: a fourth positioning pin 18, a third locking bolt 17, and a central column tube size adjustment slider 8. The upper and lower end faces of the central column tube size adjustment slider 8 are respectively tightly fitted with the end faces of the sliders 7 of the two central column tube fixtures. The central column tube size adjustment slider 8 is coaxially positioned by the fourth positioning pin 18. The central column tube size adjustment slider 8 is fastened to the sliders 7 of the two central column tube fixtures by four third locking bolts 17 distributed circumferentially.
[0027] In the specific implementation process, it is worth noting that the structure and material of the fourth positioning pin 18 are the same as the previous positioning pin. Its function is to ensure that the adjusting slider 8 of the central column tube size is accurately positioned coaxially with the sliders 7 of the two central column tube tooling, and to ensure the coaxiality of the central column tube 2 after size adjustment. The third locking bolt 17 is also a high-strength bolt. The four bolts are evenly distributed along the circumference. When tightening, they can make the adjusting slider 8 and the sliders 7 on the upper and lower sides evenly stressed, ensuring the firmness of the connection. The adjusting slider 8 of the central column tube size is adjusted according to different size adjustment requirements.
[0028] Furthermore, the mating surface of the sliding slider 10 of the inner sprue of the lower disk and the fixed slider 15 of the inner sprue of the lower disk is an inclined surface. The slider 11 of the sprue tooling of the lower disk, together with the sliding slider 10 of the inner sprue of the lower disk and the fixed slider 15 of the inner sprue of the lower disk, form the forming cavity of the sprue 3 of the lower disk.
[0029] In the specific implementation process, it is worth noting that the inclined surface fit can make the sliding slider 10 of the inner sprue of the lower disc more stable during the sliding process. The forming cavity of the sprue 3 of the lower disc, which is formed by the slider 11 of the sprue tooling of the lower disc, the sliding slider 10 of the inner sprue of the lower disc, and the fixed slider 15 of the inner sprue of the lower disc, is determined according to the process requirements of the casting. The internal surface is treated with polishing and spraying release agent to prevent wax material from adhering and ensure smooth demolding.
[0030] Furthermore, the wax injection hole 9 is located at the center of the side of the slider 6 of the upper disk's sprue fixture. The wax injection hole 9 is connected to the molding cavity, which includes an integral sprue cavity consisting of the upper disk's sprue 1, the central column tube 2, the lower disk's sprue 3, and the lower disk's inner sprue 4.
[0031] In the specific implementation process, it is worth noting that the diameter of the wax injection hole 9 is determined according to the actual wax flow rate and injection speed to ensure that the wax can be injected into the molding cavity at a suitable speed and pressure. Its center position can ensure that the wax fills the entire molding cavity evenly, avoiding defects such as local material shortage or air bubbles, and ensuring the stable and reliable quality of the one-piece molding gating system.
[0032] Working principle: Tooling assembly: This fixture adopts a modular slider structure. The main body consists of slider 6 of the upper disc's gating fixture, slider 7 of the two central column tube fixtures, slider 11 of the lower disc's gating fixture, sliding slider 10 of the lower disc's inner gating, fixed slider 15 of the lower disc's inner gating, and adjusting slider 8 for the central column tube dimensions. The sliders 7 of the two central column tube fixtures are coaxially positioned by the first locating pin 13, forming the main body of the central column tube fixture. The slider 6 of the upper disc's gating fixture is placed on the upper end face of the main body of the central column tube fixture, and radial and circumferential positioning is achieved by the second locating pin 14. The slider 6 of the upper disc's gating fixture is then secured by the first locking bolt 5. Block 6 is firmly locked to the slider 7 of the central column tube fixture, forming the forming cavity of the upper disk's sprue 1. The sliding slider 10 of the lower disk's inner sprue is first assembled with the lower end face of the central column tube fixture body, and then installed in conjunction with the slider 11 of the lower disk's sprue fixture. The slider 11 of the lower disk's sprue fixture and the slider 7 of the central column tube fixture are positioned by the third positioning pin 16, and then locked by the second locking bolt 12. The sliding slider 10 of the lower disk's inner sprue and the fixed slider 15 of the lower disk's inner sprue cooperate to jointly form the forming cavity of the lower disk's inner sprue 4, and at the same time form the forming cavity of the lower disk's sprue 3.
[0033] Adjustment of the size of the central column tube: When different types of castings need to be combined, an adjusting slider 8 for the size of the central column tube can be installed between the sliders 7 of the two central column tube fixtures. The adjusting slider 8 for the size of the central column tube is positioned with the slider 7 of the central column tube fixture through the fourth positioning pin 18, and then firmly fixed to the sliders 7 of the central column tube fixtures on the upper and lower sides through the four third locking bolts 17, thereby realizing the adjustment of the length of the central column tube 2. By adding and removing the adjusting slider 8 for the size of the central column tube, two integrated gating systems of different types can be obtained.
[0034] Integrated gating system: The assembled fixture is placed on the worktable of the wax press machine. High-temperature molten wax is injected into the cavity inside the fixture through the wax injection hole 9 on the fixture. After the wax cools and solidifies, the locking bolts and positioning pins are removed in sequence, and the sliding blocks of each fixture are separated to obtain an integrated upper and lower disc type gating cavity with an inner gating 4 of the lower disc. The system includes an integrally formed upper disc gating 1, a central column tube 2, and a lower disc gating 3.
[0035] Module combination use: The trimmed turbine guide vane wax model is directly welded to the inner runner 4 of the lower disc and the runner 1 of the upper disc of the integrated gating cavity, thus completing the assembly of the entire module. Since the inner runner and the gating system are integrally formed, no secondary welding is required, which improves the dimensional accuracy and production efficiency of the module.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A disc-type integrated gating fixture, characterized in that, The disc-shaped integrated gating fixture has a wax injection hole (9) on its side. The disc-shaped integrated gating fixture includes: Central column tube (2); First locking bolt (5); Second locking bolt (12); First positioning pin (13); Second positioning pin (14); Third positioning pin (16); The slider (7) of the central column tube tooling is provided in two, and the two sliders (7) of the central column tube tooling are coaxially positioned and connected by the first positioning pin (13). The slider (6) of the upper disc sprue fixture is positioned at the upper end of the slider (7) of the middle column tube fixture by the second positioning pin (14) and locked by the first locking bolt (5). The slider (11) of the sprue fixture of the lower disc is positioned at the lower end of the slider (7) of the middle column tube fixture by the third positioning pin (16) and locked by the second locking bolt (12). Inner runner slider assembly; the inner runner slider assembly is disposed between the lower end of the slider (7) of the central column tube fixture and the slider (11) of the runner fixture of the lower disc; The central column tube size adjustment mechanism is detachably installed between the sliders (7) of the two central column tube fixtures and is used to adjust the length of the central column tube (2).
2. The disc-type integrated gating fixture according to claim 1, characterized in that, The lower end face of the slider (6) of the upper disc gating fixture is closely fitted with the upper end face of the slider (7) of the middle column tube fixture. The second positioning pin (14) passes vertically through the slider (6) of the upper disc gating fixture and is inserted into the positioning hole of the slider (7) of the middle column tube fixture. The first locking bolt (5) is arranged axially to fasten the slider (6) of the upper disc gating fixture to the slider (7) of the middle column tube fixture.
3. The disc-type integrated gating fixture according to claim 1, characterized in that, The ingate slider assembly includes: The sliding block (10) of the inner sprue of the lower disc. Fixed slider (15) of the inner sprue of the lower disc; The upper end face of the sliding block (10) of the inner runner of the lower disc is in contact with the lower end face of the slider (7) of the middle column tube fixture, and the lower end face of the sliding block (10) of the inner runner of the lower disc is in contact with the upper end face of the slider (11) of the runner fixture of the lower disc. The fixed slider (15) of the inner runner of the lower disk is fixedly installed on the slider (11) of the runner tooling of the lower disk. The fixed slider (15) of the inner runner of the lower disk and the sliding slider (10) of the inner runner of the lower disk cooperate to form the forming cavity of the inner runner (4) of the lower disk.
4. The disc-type integrated gating fixture according to claim 1, characterized in that, The central column tube size adjustment mechanism includes: Fourth positioning pin (18); Third locking bolt (17); The adjusting slider (8) for the size of the central column tube has its upper and lower end faces tightly fitted with the end faces of the sliders (7) of the two central column tube fixtures, respectively. The adjusting slider (8) for the size of the central column tube is coaxially positioned by the fourth positioning pin (18). The adjusting slider (8) for the size of the central column tube is fastened to the sliders (7) of the two central column tube fixtures by four third locking bolts (17) distributed circumferentially.
5. The disc-type integrated gating fixture according to claim 3, characterized in that, The sliding block (10) of the inner sprue of the lower disk and the fixed block (15) of the inner sprue of the lower disk have a sloped surface. The slider (11) of the sprue tooling of the lower disk, together with the sliding block (10) of the inner sprue of the lower disk and the fixed block (15) of the inner sprue of the lower disk, form the forming cavity of the sprue (3) of the lower disk.
6. The disc-type integrated gating fixture according to claim 5, characterized in that, The wax injection hole (9) is located at the center of the side of the slider (6) of the gating fixture of the upper disc. The wax injection hole (9) is connected to the molding cavity. The molding cavity includes an integral gating cavity consisting of the gating (1) of the upper disc, the central column tube (2), the gating (3) of the lower disc, and the inner gating (4) of the lower disc.