Investment mold shell casting system
By integrating slurry barrels, roasting furnaces and cooling barrels into investment casting equipment, and combining with intelligent control systems, the problems of low process connection efficiency and insufficient automation of traditional investment casting equipment are solved, and an efficient and automated casting process is achieved, improving product quality and resource utilization.
Patent Information
- Application Number
- CN202510750104.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-06
- Publication Date
- 2025-08-01
AI Technical Summary
The existing investment casting equipment has problems such as low process connection efficiency, low degree of automation, and insufficient resource utilization, especially in the process of ceramic slurry coating, roasting and cooling, lack of integrated control of intelligent casting islands and cross-device data interoperability.
An investment mold shell casting system is designed, including a slurry barrel, a roasting furnace, a cooling barrel and a slag collection barrel installed in sequence on the frame. Combined with a rotating station frame and a transmission unit, the process is automated and precisely controlled through the sensor detection module, execution control module and intelligent decision-making module. The threaded quick disassembly structure, heating coil and high-temperature silicon carbide coating are used to improve the integration and stability of the equipment.
The efficient integration of the ceramic slurry coating, roasting and cooling links has been achieved, production efficiency and product quality have been improved, the degree of automation has been improved, the shell peeling efficiency has reached 95%, the waste residue recovery rate has been increased to 90%, and the equipment operation reliability and resource utilization have been significantly improved.
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Figure CN120394849A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of investment shell casting, and specifically relates to an investment shell casting system. Background Art
[0002] Investment casting, also known as precision casting or lost-wax casting, the production process of investment casting mainly includes wax injection, wax trimming, tree assembly, shell making, shell baking, pouring, shell removal, post-treatment and inspection, etc. The processed metal parts are generally mass-produced by using fusible materials as templates.
[0003] In the prior art, although the patent with the publication number of CN117600407B solves the problem of wax removal during shell sintering, the traditional casting molding equipment has the following defects: (1) The casting molding processes such as slurry coating, baking, and cooling are scattered in independent equipment, and an intelligent casting island cannot be formed, resulting in low efficiency in process connection; (2) The parameter control of each process depends on manual experience, lacking the multi-process coordination mechanism unique to the intelligent casting island, which is likely to cause quality fluctuations. In particular, the key technologies such as integrated control of the molding process required for the intelligent casting island and cross-device data intercommunication have not been broken through, resulting in low automation and insufficient resource utilization.
[0004] Based on this, the present invention provides an investment shell casting system to solve the problems raised in the above background art. Summary of the Invention
[0005] In view of the technical problems existing in the prior art, the present invention provides an investment shell casting system to solve the problems that the key technologies such as integrated control of the molding process required for the existing casting island and cross-device data intercommunication have not been broken through, resulting in low automation and insufficient resource utilization.
[0006] The technical solution of the present invention to solve the above technical problems is as follows: A casting device includes a frame. Along the clockwise direction, a slurry barrel, a baking furnace, a cooling barrel and a slag collection barrel are sequentially installed on the frame. A plurality of groups of regularly distributed elastic striking rods are installed on the inner wall of the slag collection barrel. A loading and unloading station is provided on the frame corresponding to the position between the slurry barrel and the slag collection barrel. A casting frame is installed on the frame in a liftable manner. A transmission unit is provided on the casting frame. A rotatable working station frame that can rotate periodically by ° and a rotatable transmission gear ring are respectively connected to the transmission unit in a transmission manner. An inner valve ring and a fixed-point transmission module that cooperates with the transmission gear ring are fixedly installed on the casting frame. A valve barrel is rotatably sleeved on the inner valve ring. A steam inlet pipe is communicated with the inner valve ring corresponding to the position of the baking furnace. A pouring pipe is communicated with the inner valve ring corresponding to the position of the cooling barrel. Three workpiece mounting units are installed on the rotatable working station frame; The control system includes a sensor detection module, an execution control module and an intelligent decision-making module. The sensor detection module is connected to the execution control module through an industrial bus. The intelligent decision-making module dynamically coordinates the rotation positioning of the rotary workstation, the vibration parameters and temperature field distribution of the workpiece mounting unit according to the process stage.
[0007] On the basis of the above technical solution, the present invention can also be improved as follows.
[0008] Furthermore, the workpiece mounting unit includes a power shaft driven by a fixed-point transmission module, an oscillation system is connected to the power shaft, an oscillation table that can vibrate up and down is installed on the oscillation system, a rotatable mounting shaft is rotatably installed on the inner wall of the oscillation table, a casting tube is threadedly installed on the mounting shaft, and multiple groups of blanks are installed on the casting tube, and a flow channel for pouring liquid or steam to pass through is fixedly opened inside the mounting shaft, and the flow channel is fixedly connected to the valve cylinder through a connecting pipe.
[0009] Furthermore, a vertically arranged screw lifting module is installed on the frame, and the screw lifting module is transmission-connected to the casting frame.
[0010] The beneficial effect of adopting the above-mentioned further solution is that before use, the height of the casting frame can be flexibly adjusted through the screw lifting module to adapt to casting tubes and blanks of different specifications, thereby realizing an automated and intelligent casting process. Compared with traditional casting equipment with manual adjustment or lack of precise control, this design greatly improves the operating convenience and production accuracy of the casting system, effectively solves the shortcomings of traditional equipment in adaptability and control accuracy, reduces manual intervention and operating errors, and thus improves product quality and production efficiency.
[0011] Furthermore, the top ends of the slurry cylinder, roasting furnace, cooling cylinder and slag collection cylinder are open, the roasting furnace is equipped with a heating jacket, the cooling cylinder is equipped with a circulating water cooling system, and the bottoms of the slurry cylinder, roasting furnace, cooling cylinder and slag collection cylinder are equipped with a discharge valve.
[0012] The beneficial effect of adopting the above further solution is that, when in use, the top openings of the slurry drum, roasting furnace, cooling drum and slag collection drum facilitate the insertion and removal of the casting tube and the preform. The heating jacket on the roasting furnace can be heated to 1200°C, which can provide a high-temperature roasting environment for the preform, effectively remove impurities and enhance the strength of the mold shell. The circulating water cooling system on the cooling cylinder can quickly cool the casting tube and the preform, shorten the production cycle, and ensure the crystallization quality and dimensional accuracy of the preform. The discharge valve at the bottom of each cylinder is convenient for discharging residual slurry, waste residue and other waste materials to keep the interior of the equipment clean. Compared with traditional casting equipment, this integrated and functionally perfect structural design solves the problems of inconvenient and inefficient separate operations in each link of the casting process, and realizes the process from ceramic slurry coating to baking.
[0013] Furthermore, a servo motor is installed on the casting frame. An intermittent shaft and a belt shaft are rotatably installed on the casting frame. The intermittent shaft is fixedly connected to the rotating station frame. A small belt pulley is installed at the output shaft end of the servo motor. A large belt pulley is installed on the belt shaft. The small belt pulley is connected to the large belt pulley through a first synchronous belt. An incomplete gear is installed on the belt shaft. A toothed part is fixedly arranged on the incomplete gear. A passive gear meshing with the incomplete gear is installed on the intermittent shaft. A core shaft is rotatably installed on the inner wall of the intermittent shaft. The output shaft end of the servo motor is connected to the core shaft through a second synchronous belt. The transmission gear ring is fixedly installed on the core shaft.
[0014] The beneficial effect of adopting the above further scheme is that after the servo motor is started, its output shaft drives the small belt pulley to rotate, drives the large belt pulley through the first synchronous belt, and then drives the belt shaft to rotate. Since the radius of the large belt pulley is 2 - 3 times that of the small belt pulley, speed reduction and torque increase can be achieved, providing stable power for subsequent transmission. The incomplete gear on the belt shaft meshes with the passive gear on the intermittent shaft, and the central angle corresponding to the toothed part of the incomplete gear is 72°. When the incomplete gear rotates, every time it makes a full turn, the intermittent shaft drives the core shaft and the transmission gear ring fixed on the core shaft to achieve periodic 72° rotation, thereby driving the rotating station frame to intermittently rotate at a set angle. This transmission method can accurately control the rotation angle and time interval of the rotating station frame, ensuring the orderly movement of the preform between different stations such as the slurry cylinder, roasting furnace, cooling cylinder, and slag collection cylinder, solving the problem that it is difficult to achieve precise intermittent transmission with traditional transmission methods, improving the automation and precision of the casting system, and ensuring the efficient and stable operation of the casting process.
[0015] Furthermore, the radius of the large belt pulley is 2 to 3 times that of the small belt pulley. The incomplete gear and the passive gear have the same radius, and the central angle corresponding to the toothed part is 72°.
[0016] The beneficial effects of adopting the above further solution are as follows: during use, the radius ratio design of the large pulley and the small pulley enables the power of the servo motor to be decelerated and the torque to be increased during the transmission process, ensuring the stable operation of the subsequent transmission components, reducing the motor load, and extending the service life of the motor. The design that the incomplete gear and the passive gear have the same radius and a tooth part central angle of 72° ensures the precise intermittent rotation of the transmission gear ring and the rotating station frame. Compared with the traditional transmission structure, this precise dimensional parameter setting solves the problems of inaccurate angle control and unstable operation during the transmission process, enabling the residence time and movement angle of the preform at each station to be precisely controlled, which helps to improve the quality consistency and production efficiency of the casting products and avoid product defects and production failures caused by transmission errors.
[0017] Further, the transmission unit includes an eccentric wheel installed on the power shaft. The oscillating table is slidably connected to the rotating station frame. A limiting spring limited by the rotating station frame is installed on the top surface of the oscillating table. A follower wheel is rotatably installed on the oscillating table. The contour of the eccentric wheel is in rolling contact with the wheel surface of the follower wheel. A hollow shaft is rotatably installed on the rotating station frame. Front bevel gears are installed on both the hollow shaft and the power shaft, and the two front bevel gears are meshed with each other. A square groove with both ends open is fixedly formed inside the hollow shaft. The mounting shaft is rotatably installed on the oscillating table through a bearing. A connecting groove section slidably connected to the square groove is fixedly arranged on the mounting shaft. The cross-sections of the connecting groove section and the square groove are both regular hexagons. A tail bevel gear is fixedly installed at the tail end of the power shaft.
[0018] The beneficial effects of adopting the above further solution are as follows: during use, the rotation of the power shaft drives the eccentric wheel to rotate. The contour of the eccentric wheel is in rolling contact with the follower wheel, causing the oscillating table to vibrate up and down under the action of the limiting spring, thereby vibrating the mold tube and the preform mounted on the oscillating table, which helps the ceramic slurry to evenly adhere to the surface of the preform and improves the coating quality. The power shaft is transmitted to the hollow shaft through the front bevel gears. The cooperation between the square groove in the hollow shaft and the connecting groove section of the mounting shaft enables the mounting shaft to rotate synchronously when the oscillating table vibrates up and down, facilitating the loading and unloading of the mold tube and the material conveying during the casting process. The tail bevel gear at the tail end of the power shaft provides power input for the subsequent fixed-point transmission module. The design of this transmission unit is ingenious. Through the coordinated work of various components, it solves the problems of uneven ceramic slurry coating and inconvenient loading and unloading of the mold tube in the traditional casting process, improves the quality and production efficiency of the casting products, and enhances the practicability of the equipment.
[0019] Further, the fixed-point transmission module includes a fixed frame installed on the casting frame. A driving shaft is rotatably installed on the fixed frame at positions corresponding to the slurry cylinder, the cooling cylinder, and the slag collection cylinder. A driven gear connected to the transmission gear ring is fixedly installed at the bottom of the driving shaft. A top bevel gear meshed with the tail bevel gear is fixedly installed at the top of the driving shaft.
[0020] The beneficial effects of adopting the above further solution are as follows: when the transmission gear ring rotates, it drives the passive gear at the bottom of the feeding shaft to rotate, thereby causing the feeding shaft to rotate. The top cone gear at the top of the feeding shaft meshes with the tail cone gear at the end of the power shaft, transmitting power to the power shaft, and realizing the drive of the power shaft in the workpiece mounting unit. In this way, when the rotating station frame rotates to different stations, the fixed-point transmission module can ensure that the power shaft accurately obtains power at the corresponding station, driving components such as the oscillation system and the mounting shaft to work normally. Compared with the traditional power transmission method, this fixed-point transmission module has a compact structure and precise transmission, effectively solving the problems of unstable power transmission between different stations and difficulty in precise control, improving the coordination and stability of the operation of each station in the casting system, ensuring the smooth progress of the casting process, and improving the product quality.
[0021] When the mold tube moves into the slurry cylinder, the mold tube drives the preform to perform a rotary vibration motion, thereby enabling the preform to be quickly and evenly coated with slurry; When the mold tube moves to the roasting furnace, the heating jacket first works at a low temperature. Through the low-temperature operation, the ceramic slurry is preliminarily hardened. When operating at a low temperature, the servo motor is in a closed state, and when operating at a low temperature, the wax liquid in the mold tube and the preform melts, and high-temperature steam is introduced into the cavities of the mold tube and the preform, thereby accelerating the discharge of the wax liquid and improving the drainage cleanliness of the wax liquid. Subsequently, the heating jacket heats up at a high temperature and is heated to 1200 °C to realize the roasting of the ceramic slurry; When the mold tube moves to the cooling cylinder, the pouring liquid is injected into the roasted cavity. After pouring, the circulating water cooling system works to cool and shape the poured workpiece. When pouring, the mold tube drives the preform to perform a rotary vibration motion, thereby reducing the bubble generation rate during pouring; When the mold tube moves to the slag collection cylinder, the mold tube drives the preform to perform a rotary vibration motion, and the preform contacts the elastic striking rod, thereby quickly peeling the mold shell from the preform through the vibration force and the striking force; Furthermore, the mold tube is a hollow tubular structure with openings at both ends. One end of the mold tube is fixedly provided with a thread, and the mounting shaft is fixedly provided with a thread groove adapted to the thread. The length of the first sealing rod is 1.1 to 1.2 times the length of the mold tube, and the length of the second sealing rod is 0.1 to 0.2 times the length of the mold tube.
[0022] The beneficial effects of adopting the above further solution are as follows: The hollow structure with openings at both ends of the casting tube facilitates the passage of the casting liquid or steam. The thread at one end thereof is matched with the thread groove on the mounting shaft, which facilitates the installation and disassembly of the casting tube and improves production efficiency. The length of the first sealing rod is 1.1 - 1.2 times the length of the casting tube. When at the slurry cylinder station, it can penetrate into the casting tube to effectively seal the bottom of the casting tube, preventing the ceramic slurry from entering the inner cavities of the casting tube and the blank. The length of the second sealing rod is 0.1 - 0.2 times the length of the casting tube. When at the cooling cylinder station, it can seal the bottom of the casting tube to prevent the casting liquid from leaking out from the bottom end of the casting tube during pouring.
[0023] Furthermore, a heating coil is built inside the mounting shaft, and the inner wall of the flow channel is coated with a high-temperature resistant silicon carbide coating.
[0024] The beneficial effects of adopting the above further solution are as follows: On the one hand, the heating coil built inside the mounting shaft can preheat or assist in heating the casting tube and the blank during the casting process, which helps to improve the fluidity of the casting liquid, ensure the forming quality of the blank, and reduce the defects of the blank caused by uneven temperature. On the other hand, it can avoid the blockage of the flow channel by the casting material during pouring. The high-temperature resistant silicon carbide coating on the inner wall of the flow channel can effectively resist the erosion of high-temperature casting liquid and steam, extend the service life of the flow channel, and ensure the stable transportation of the casting liquid and steam in the flow channel. Compared with the casting equipment without heating devices and special coatings, this design solves the problems of poor temperature control and easy damage of the flow channel during the casting process, improves the reliability of the casting system and the product quality, and reduces the equipment maintenance cost.
[0025] Furthermore, the workpiece mounting unit further includes a cover installed on the rotating station frame.
[0026] The beneficial effects of adopting the above further solution are as follows: During use, the cover installed on the rotating station frame can seal each cylinder when the casting tube is located in the slurry cylinder, roasting furnace, cooling cylinder, and slag collection cylinder, reducing heat dissipation, preventing foreign matters from entering, and ensuring the stability of the casting environment.
[0027] The beneficial effects of the present invention are as follows: 1. The present invention integrates the casting processes such as ceramic slurry coating, roasting, cooling, and slag collection in the same equipment. Through the slurry cylinder, roasting furnace, cooling cylinder, and slag collection cylinder sequentially arranged in the clockwise direction on the frame, and the rotatable rotating station frame, the orderly transfer of the blank among each process is realized. Compared with the traditional casting equipment where each process is separated from each other, the present invention avoids the cumbersome transfer operation, greatly saves time and manpower, fundamentally solves the problems of the existing casting island, and makes the casting process more coherent and efficient.
[0028] 2. In traditional coating processes, ceramic slurry accumulation or local absence is likely to occur. In the present invention, an eccentric wheel of the workpiece mounting unit drives the oscillating table to vibrate up and down, combined with the synchronous rotation of the mounting shaft, so that the ceramic slurry evenly covers the surface of the preform, and a high-temperature resistant silicon carbide coating is applied to the inner wall of the runner. With the active temperature control of the heating coil, solidification of the casting liquid is avoided to prevent blockage.
[0029] 3. The mold casting tube of the present invention adopts a quick-release thread structure. The first sealing rod and the second sealing rod are designed with different lengths to adapt to the sealing requirements of different processes. The screw rod lifting module supports stepless adjustment of the height of the casting rack and can be compatible with various specifications of mold casting tubes. In traditional slag removal, it relies on manual knocking, which is inefficient and prone to damaging the mold shell. The inner wall of the slag removal barrel of the present invention is provided with multiple groups of elastic striking rods. Combined with the rotary vibration movement of the mold casting tube, the mold shell is peeled off through a flexible striking force, and the waste slag is automatically collected through the bottom discharge valve. Through the above structural settings, the efficiency of mold shell peeling is increased to 95%, the recovery rate of waste slag is increased to 90%, and there is no wear of metal tools. The environmental protection and economy are significantly superior to traditional processes.
[0030] 4. The sensing detection module is used to collect multi-dimensional data such as the viscosity of the slurry and the temperature field distribution in real time. The intelligent decision-making module dynamically optimizes the rotation positioning accuracy of ±0.5°, the vibration frequency (adjustable from 20 to 150 Hz), and the temperature field uniformity (±15°C) based on the process database and the adaptive algorithm. The multi-sensor cooperation mechanism is adopted to achieve millisecond-level pressure closed-loop control during the pouring stage, so that the pressure fluctuation in the runner is controlled within ±3 kPa. The health of the transmission system is evaluated through the fault diagnosis sub-module, and component failure is predicted 72 hours in advance, significantly improving the operation reliability of the intelligent casting island. This control system increases the qualified rate of the molding process to 98.6% and reduces the energy consumption by 22%, truly realizing the digital control of the casting molding process. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 is a schematic diagram of the overall principle of the investment casting mold shell casting system of the present invention Figure 2 is a schematic diagram of the overall structure of an investment casting mold shell casting system of the present invention; Figure 3 is of the present invention Figure 1 is a partially enlarged structural schematic diagram at A in Figure 4 is of the present invention Figure 1 is a sectional structural schematic diagram of Figure 5 is of the present invention Figure 3 is a partially enlarged structural schematic diagram at B in Figure 6 is of the present invention Figure 3 is a partially enlarged structural schematic diagram at C in Figure 7 is a structural schematic diagram of the fixing frame and the driving shaft of the present invention; Figure 8 This is a schematic structural diagram of the casting tube of the present invention; Figure 9 This is a schematic structural diagram of the casting frame and the cover of the present invention; Figure 10 This is a schematic structural diagram of the inner valve ring of the present invention; Figure 11 This is a schematic structural diagram of the slurry cylinder and the cooling cylinder of the present invention; Figure 12 This is a schematic structural diagram of the circulating water cooling system of the present invention; Figure 13 This is a schematic diagram of the principle of the actuator of the casting equipment of the present invention; Figure 14 This is a schematic diagram of the principle of the sensor detection module of the present invention; Figure 15 This is a schematic diagram of the principle of the intelligent decision-making module of the present invention; Figure 16 This is a schematic diagram of the principle of the execution control module of the present invention.
[0032] In the drawings, the list of components represented by each reference numeral is as follows: 1. Frame; 2. Slurry cylinder; 3. Roaster; 4. Cooling cylinder; 5. Slag collection cylinder; 6. Elastic impact rod; 7. Casting frame; 8. Rotary station frame; 9. Driving gear ring; 10. Inner valve ring; 11. Valve cylinder; 12. Steam inlet pipe; 13. Pouring pipe; 14. Power shaft; 15. Oscillation table; 16. Mounting shaft; 17. Casting tube; 18. Green blank; 19. Runner; 20. Connecting pipe; 21. First sealing rod; 22. Second sealing rod; 23. Screw rod lifting module; 24. Human-machine interaction terminal; 25. Heating jacket; 26. Circulating water cooling system; 27. Servo motor; 28. Intermittent shaft; 29. Belt shaft; 30. Incomplete gear; 31. Driven gear; 32. Core shaft; 33. Eccentric wheel; 34. Limit spring; 35. Follow-up wheel; 36. Hollow shaft; 37. Fixed frame; 38. Driving shaft; 39. Driven gear; 40. Heating coil; 41. Cover. Detailed implementation manners
[0033] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.
[0034] The present invention provides the following preferred embodiments As Figure 1-12 shown, a precision investment casting shell casting system includes casting equipment and a control system: The casting equipment includes a frame 1, on which a slurry drum 2, a roasting furnace 3, a cooling drum 4 and a slag collecting drum 5 are sequentially installed in a clockwise direction. The inner wall of the slag collecting drum 5 is installed with multiple groups of regularly distributed elastic striking rods 6. A loading and unloading station is provided on the frame 1 at a position corresponding to the slurry drum 2 and the slag collecting drum 5. A casting frame 7 is installed on the frame 1 so as to be liftable. The casting frame 7 is provided with a transmission unit, and the transmission unit is respectively connected to a rotating station frame 8 that can rotate periodically 72° and a rotatable transmission ring 9. An inner valve ring 10 and a fixed-point transmission module cooperating with the transmission ring 9 are fixedly installed on the casting frame 7. A valve drum 11 is rotatably sleeved on the inner valve ring 10. A steam inlet pipe 12 is connected to the inner valve ring 10 at a position corresponding to the roasting furnace 3. A pouring pipe 13 is connected to the inner valve ring 10 at a position corresponding to the cooling drum 4. Three workpiece mounting units are installed on the rotary station frame 8; The control system includes a sensor detection module, an execution control module and an intelligent decision-making module. The sensor detection module is connected to the execution control module through an industrial bus. The intelligent decision-making module dynamically coordinates the rotation positioning of the rotary workbench 8, the vibration parameters and temperature field distribution of the workpiece mounting unit according to the process stage.
[0035] The workpiece mounting unit includes a power shaft 14 driven by a fixed-point transmission module, an oscillation system is connected to the power shaft 14, an oscillation table 15 that can vibrate up and down is installed on the oscillation system, a rotatable mounting shaft 16 is rotatably installed on the inner wall of the oscillation table 15, a casting tube 17 is threadedly installed on the mounting shaft 16, and multiple groups of blanks 18 are installed on the casting tube 17. A flow channel 19 for pouring liquid or steam to pass through is fixedly opened inside the mounting shaft 16, and the flow channel 19 is fixedly connected to the valve cylinder 11 through a connecting pipe 20.
[0036] A vertically arranged screw lifting module 23 is installed on the frame 1 , and the screw lifting module 23 is transmission-connected to the casting frame 7 .
[0037] Before use, the height of the casting frame 7 can be flexibly adjusted through the screw lifting module 23 to adapt to casting tubes 17 and blanks 18 of different specifications, meet diverse production needs, and realize an automated and intelligent casting process. Compared with traditional casting equipment with manual adjustment or lack of precise control, this design greatly improves the operating convenience and production accuracy of the casting system, effectively solves the shortcomings of traditional equipment in adaptability and control accuracy, reduces manual intervention and operating errors, and thus improves product quality and production efficiency.
[0038] The top ends of the slurry drum 2, roasting furnace 3, cooling drum 4 and slag collecting drum 5 are open, a heating jacket 25 is installed on the roasting furnace 3, a circulating water cooling system 26 is installed on the cooling drum 4, and a discharge valve is installed at the bottom of the slurry drum 2, roasting furnace 3, cooling drum 4 and slag collecting drum 5.
[0039] When in use, the top ends of the slurry cylinder 2, roasting furnace 3, cooling cylinder 4 and slag collecting cylinder 5 are open to facilitate the insertion and removal of the mold tube 17 and the preform 18. The heating jacket 25 on the roasting furnace 3 can be heated to 1200°C, which can provide a high-temperature roasting environment for the preform 18, effectively remove impurities and enhance the strength of the mold shell. The circulating water cooling system 26 on the cooling cylinder 4 can quickly cool the casting tube 17 and the preform 18, shortening the production cycle and ensuring the crystallization quality and dimensional accuracy of the preform 18. The discharge valve at the bottom of each cylinder is convenient for discharging residual slurry, waste residue and other waste materials to keep the interior of the equipment clean. Compared with traditional casting equipment, this integrated and fully functional structural design solves the problems of inconvenient and inefficient separation of various links in the casting process, and realizes the entire process from slurry coating to baking.
[0040] A servo motor 27 is installed on the casting frame 7, and an intermittent shaft 28 and a belt shaft 29 are rotatably installed on the casting frame 7. The intermittent shaft 28 is fixedly connected to the rotating station frame 8; A small pulley is installed on the output shaft end of the servo motor 27, and a large pulley is installed on the belt shaft 29. The small pulley is connected to the large pulley through a first synchronous belt. An incomplete gear 30 is installed on the belt shaft 29, and a toothed portion is fixedly provided on the incomplete gear 30. A passive gear 31 meshing with the incomplete gear 30 is installed on the intermittent shaft 28. A core shaft 32 is rotatably installed on the inner wall of the intermittent shaft 28. The output shaft end of the servo motor 27 is connected to the core shaft 32 through a second synchronous belt, and the transmission ring gear 9 is fixedly mounted on the core shaft 32.
[0041] After the servo motor 27 is started, its output shaft drives the small pulley to rotate, which drives the large pulley through the first synchronous belt, and then drives the belt shaft 29 to rotate. Since the radius of the large pulley is twice the radius of the small pulley, it can achieve deceleration and torque increase, providing stable power for subsequent transmission. The incomplete gear 30 on the belt shaft 29 is engaged with the passive gear 31 on the intermittent shaft 28, and the central angle corresponding to the tooth portion of the incomplete gear 30 is 72°. When the incomplete gear 30 rotates, every time it rotates one circle, the intermittent shaft 28 drives the core shaft 32 and the transmission gear ring 9 fixed on the core shaft 32 to achieve a periodic 72° rotation, thereby driving the rotary workbench 8 to rotate intermittently at a set angle. This transmission method can accurately control the rotation angle and time interval of the rotary workbench 8, ensuring that the preform 18 moves in an orderly manner between different workstations such as the slurry drum 2, roasting furnace 3, cooling drum 4 and slag collection drum 5, solving the problem that the traditional transmission method is difficult to achieve precise intermittent transmission, improving the automation and precision of the casting system, and ensuring the efficient and stable operation of the casting process.
[0042] The radius of the large pulley is twice that of the small pulley. The radius of the incomplete gear 30 and the driven gear 31 are the same, and the central angle corresponding to the toothed portion is 72°.
[0043] During use, the radius ratio of the large pulley to the small pulley is designed such that the power of the servo motor 27 is decelerated and the torque is increased during the transmission process, ensuring the stable operation of the subsequent transmission components, reducing the motor load, and extending the service life of the motor. The design that the incomplete gear 30 and the passive gear 31 have the same radius and a tooth center angle of 72° ensures the accurate intermittent rotation of the transmission gear ring 9 and the rotary station frame 8. Compared with the traditional transmission structure, this precise setting of dimensional parameters solves the problems of inaccurate angle control and unstable operation during the transmission process, enabling the residence time and movement angle of the preform 18 at each station to be accurately controlled, contributing to improving the quality consistency and production efficiency of the casting products, and avoiding product defects and production failures caused by transmission errors.
[0044] The transmission unit includes an eccentric wheel 33 mounted on the power shaft 14. The oscillating table 15 is slidably connected to the rotary station frame 8. A limiting spring 34 limited by the rotary station frame 8 is mounted on the top surface of the oscillating table 15. A follower wheel 35 is rotatably mounted on the oscillating table 15. The contour of the eccentric wheel 33 is in rolling contact with the wheel surface of the follower wheel 35. A hollow shaft 36 is rotatably mounted on the rotary station frame 8. Front bevel gears are mounted on both the hollow shaft 36 and the power shaft 14, and the two front bevel gears mesh with each other. A square groove with both ends open is fixedly formed inside the hollow shaft 36. The mounting shaft 16 is rotatably mounted on the oscillating table 15 through a bearing. A connecting groove section slidably connected to the square groove is fixedly provided on the mounting shaft 16. The cross-sections of the connecting groove section and the square groove are both regular hexagons. A tail bevel gear is fixedly mounted at the tail end of the power shaft 14.
[0045] During use, the rotation of the power shaft 14 drives the eccentric wheel 33 to rotate. The contour of the eccentric wheel 33 is in rolling contact with the follower wheel 35, causing the oscillating table 15 to reciprocate up and down under the action of the limiting spring 34, thereby vibrating the casting tube 17 and the preform 18 mounted on the oscillating table 15, which helps the ceramic slurry to uniformly adhere to the surface of the preform 18 and improves the coating quality. The power shaft 14 is transmitted to the hollow shaft 36 through the front bevel gears. The cooperation between the square groove in the hollow shaft 36 and the connecting groove section of the mounting shaft 16 enables the mounting shaft 16 to rotate synchronously when the oscillating table 15 vibrates up and down, facilitating the loading and unloading of the casting tube 17 and the material transportation during the casting process. The tail bevel gear at the tail end of the power shaft 14 provides power input for the subsequent fixed-point transmission module. The design of this transmission unit is ingenious. Through the coordinated work of various components, it solves the problems of uneven ceramic slurry coating and inconvenient loading and unloading of the casting tube 17 in the traditional casting process, improves the quality and production efficiency of the casting products, and enhances the practicability of the equipment.
[0046] The fixed-point transmission module includes a fixed frame 37 installed on the casting frame 7. At positions corresponding to the slurry cylinder 2, the cooling cylinder 4, and the slag collection cylinder 5 on the fixed frame 37, a driving shaft 38 is rotatably installed. At the bottom of the driving shaft 38, a driven gear 39 is fixedly installed and is in transmission connection with the transmission gear ring 9. At the top of the driving shaft 38, a top cone gear meshing with the tail cone gear is fixedly installed.
[0047] When the transmission gear ring 9 rotates, it drives the driven gear 31 at the bottom of the driving shaft 38 to rotate, and then drives the driving shaft 38 to rotate. The top cone gear at the top of the driving shaft 38 meshes with the tail cone gear at the tail end of the power shaft 14, transmitting power to the power shaft 14, realizing the drive of the power shaft 14 in the workpiece mounting unit. In this way, when the rotating station frame 8 rotates to different stations, the fixed-point transmission module can ensure that the power shaft 14 accurately obtains power at the corresponding stations, driving components such as the oscillation system and the mounting shaft 16 to work normally. Compared with the traditional power transmission method, this fixed-point transmission module has a compact structure and precise transmission, effectively solving the problems of unstable power transmission between different stations and difficult precise control, improving the coordination and stability of the operation of each station in the casting system, ensuring the smooth progress of the casting process, and improving the product quality.
[0048] When the casting pipe 17 moves into the slurry cylinder 2, the casting pipe 17 drives the preform 18 to perform a rotary vibration motion, so that the preform 18 is quickly and evenly coated with slurry; When the casting pipe 17 moves to the roasting furnace 3, the heating jacket 25 first works at a low temperature. Through the low-temperature work, the ceramic slurry is preliminarily hardened. When working at a low temperature, the servo motor 27 is in a closed state, and when working at a low temperature, the wax liquid in the casting pipe 17 and the preform 18 melts, and high-temperature steam is introduced into the cavities inside the casting pipe 17 and the preform 18, so as to accelerate the discharge of the wax liquid and improve the discharge cleanliness of the wax liquid. Subsequently, the heating jacket 25 heats at a high temperature and is heated to 1200 °C to realize the roasting of the ceramic slurry; When the casting pipe 17 moves to the cooling cylinder 4, the pouring liquid is injected into the roasted cavity. After pouring, the circulating water cooling system 26 works to cool and shape the poured workpiece. When pouring, the casting pipe 17 drives the preform 18 to perform a rotary vibration motion, so as to reduce the bubble generation rate during pouring; When the casting pipe 17 moves to the slag collection cylinder 5, the casting pipe 17 drives the preform 18 to perform a rotary vibration motion, and the preform 18 contacts the elastic striking rod 6, so that the mold shell is quickly peeled off from the preform 18 through the vibration force and the striking force; The casting pipe 17 is a hollow tubular structure with openings at both ends. One end of the casting pipe 17 is fixedly provided with a thread, and the mounting shaft 16 is fixedly provided with a thread groove adapted to the thread. The length of the first sealing rod 21 is 1.2 times the length of the casting pipe 17, and the length of the second sealing rod 22 is 0.1 times the length of the casting pipe 17.
[0049] The hollow structure with openings at both ends of the mold tube 17 facilitates the passage of casting liquid or steam. The thread at one end thereof mates with the thread groove on the mounting shaft 16, which facilitates the installation and disassembly of the mold tube 17, improves production efficiency. The length of the first sealing rod 21 is 1.2 times the length of the mold tube 17. When at the slurry cylinder 2 station, it can extend into the mold tube 17 to effectively block the bottom of the mold tube 17, preventing the ceramic slurry from entering the inner cavities of the mold tube 17 and the green blank 18. The length of the second sealing rod 22 is 0.1 times the length of the mold tube 17. When at the cooling cylinder 4 station, it can block the bottom of the mold tube 17 to prevent the pouring liquid from leaking out from the bottom end of the mold tube 17 during pouring.
[0050] The mounting shaft 16 is internally provided with a heating coil 40, and the inner wall of the flow channel 19 is coated with a high-temperature resistant silicon carbide coating.
[0051] The heating coil 40 internally provided in the mounting shaft 16 can, on the one hand, preheat or assist in heating the mold tube 17 and the green blank 18 during the casting process, which helps to improve the fluidity of the casting liquid, ensure the forming quality of the green blank 18, and reduce the defects of the green blank 18 caused by uneven temperature. On the other hand, it can prevent the casting material from blocking the flow channel 19 during pouring. The high-temperature resistant silicon carbide coating coated on the inner wall of the flow channel 19 can effectively resist the erosion of high-temperature casting liquid and steam, extend the service life of the flow channel 19, and ensure the stable transportation of the casting liquid and steam in the flow channel 19. Compared with the casting equipment without a heating device and a special coating, this design solves the problems of poor temperature control and easy damage of the flow channel 19 during the casting process, improves the reliability of the casting system and the product quality, and reduces the equipment maintenance cost.
[0052] The workpiece mounting unit further includes a cover 41 installed on the rotary station frame 8.
[0053] During use, the cover 41 installed on the rotary station frame 8 can seal each cylinder when the mold tube 17 is located in the slurry cylinder 2, the roasting furnace 3, the cooling cylinder 4, and the slag collection cylinder 5, reduce heat dissipation, prevent foreign matters from entering, and ensure the stability of the casting environment.
[0054] As Figure 13-16 shown, as an implementation manner, the sensing and detecting module includes a slurry state sensor distributed in the slurry cylinder 2, a multi-zone temperature sensor in the roasting furnace 3, a pressure sensor of the cooling cylinder 4, and a vibration sensor of the slag collection cylinder 5; The slurry state sensor includes an immersion viscometer and an ultrasonic level gauge. The multi-zone temperature sensor is a K-type thermocouple array arranged along the axial direction of the roasting furnace 3, and the distance between adjacent thermocouples is 1 / 8 - 1 / 10 of the furnace body height.
[0055] The execution and control module includes a servo drive unit, a heating power adjustment unit, and a cooling flow valve group; The intelligent decision-making module is built with a process database and an adaptive algorithm, which receives sensing data in real time and generates control instructions.
[0056] In addition, the integrated control system further includes a human-machine interaction terminal 24, which is communicatively connected to the intelligent decision-making module and is used for parameter setting and status monitoring.
[0057] Specifically, the intelligent decision-making module includes: A roasting temperature control sub-module, which calls a pre-stored sintering curve according to the blank material code and adjusts the power of each zone of the heating jacket 25 through a PID algorithm; Among them, a multi-zone temperature equalization algorithm is adopted: There are n temperature zones. The temperature deviation ei(t) of the i-th temperature zone is ei(t)=Tset - Ti(t), and an improved fuzzy PID control is adopted: PID parameter self-tuning rules: When |e|>50°C: Kp = 8, Ki = 0.05, Kd = 2; When 20°C ≤ |e| ≤ 50°C: Kp = 5, Ki = 0.1, Kd = 1; When |e|<20°C: Kp = 3, Ki = 0.2, Kd = 0.5; Control quantity calculation formula: Among them, λ = 0.2 is the coupling coefficient, and wj = 1 / (1 + |i - j|) is the adjacent zone weight factor.
[0058] In the high-temperature sintering stage (T = 1200°C), when it is detected that the temperature of the 3rd zone T3 = 1185°C (e = 15°C), the system automatically: Selects PID parameters according to the rules: Kp = 3, Ki = 0.2, Kd = 0.5 Calculates the control quantity u3 = 3×15 + 0.2×∫e dt + 0.5×de / dt + 0.2×(0.5e2 + 0.33e4) Increases the heating power to P3 = Pbase + u3×Kpwr (Kpwr = 50W / °C).
[0059] A vibration cooperation sub-module, which dynamically sets the rotation speed and amplitude of the eccentric wheel 33 based on the analysis result of the resonance frequency of the casting tube 17; Adopts a resonance avoidance algorithm: 1. FFT spectrum analysis: Perform 1024-point FFT on the vibration acceleration signal a(t):
[0060] 2. Characteristic frequency extraction: Finds the amplitude peak frequency fpeak = argmaxk|A(fk)| Calculate the 3dB bandwidth: Δf = fhigh - flow, where |A(f)| ≥ 0.707|A(fpeak)|.
[0061] 3. Frequency avoidance strategy When the inherent frequency of the parison fn = 85Hz and the current driving frequency fcurrent = 82Hz (falling into the resonance band 80 - 90Hz): The system automatically adjusts the driving frequency to fdrive = 85 + 2×(90 - 80) = 105Hz Achieved through the speed regulation of the servo motor: nnew = (105 / 85)×nold.
[0062] The fault diagnosis sub - module detects gear wear or shaft system offset by comparing the phase signal of the transmission system with the theoretical value.
[0063] Transmission system health assessment model: 1. Feature extraction: Gear meshing backlash: δ = |θdrive - θload| / r (r is the gear radius) Vibration envelope energy: E = ∫|Hilbert(a(t))|²dt.
[0064] 2. Degradation index calculation:
[0065] 3. Remaining useful life prediction:
[0066] It is detected that the current δ of a certain transmission shaft is 0.12mm (initial δ0 = 0.08mm), and the vibration energy E = 150mV²·s (initial E0 = 100mV²·s): Calculate the degradation index: D = 0.6×(0.12 / 0.08) + 0.4×(150 / 100) = 0.9 + 0.6 = 1.5 Judge D > Dcr = 1.2 → Trigger an emergency stop and alarm Analysis of historical data shows dD / dt = 0.1 / day → RUL = (1.2 - 1.0) / 0.1 = 2 days (early warning) The execution control module is linked with the workpiece mounting unit. During the pouring stage, according to the pressure sensor data of the pouring pipe 13, the opening of the pouring valve is adjusted with a response speed of 0.1 second level to maintain the pressure in the runner 19 stable within the range of ±5kPa.
[0067] The execution control module is linked with the workpiece mounting unit. During the pouring stage, according to the pressure sensor data of the pouring pipe 13, the opening of the pouring valve is adjusted with a response speed of 0.1 second level to maintain the pressure in the runner 19 stable within the range of ±5kPa.
[0068] Through the collaborative optimization of the above algorithms, precise intelligent control of the entire investment casting process is achieved, and the process stability is improved to the leading level in the industry.
[0069] The working process of the control system is as follows: Initialization stage: The operator selects the alloy type through the human-machine interaction terminal 49, and the intelligent decision-making module automatically loads the corresponding slurry viscosity range, roasting gradient curve, and cooling rate parameters. The vision positioning module 48 calibrates the zero position of the rotating station frame 8.
[0070] Coating control: When the workpiece mounting unit enters the slurry tank 2, the immersion viscometer monitors the slurry viscosity in real time. If the detected value deviates from the set range, the intelligent decision-making module calculates the diluent addition amount and synchronously starts the stirring motor to compensate for the viscosity. The ultrasonic level gauge triggers the automatic feeding system to maintain the liquid level fluctuation within ±3 mm.
[0071] Intelligent roasting: The multi-zone temperature sensor continuously collects the temperature distribution in the roasting furnace 3, and the roasting temperature control sub-module performs the following operations: In the low-temperature dewaxing stage of 200 - 400 °C, control the temperature gradient ≤15 °C / min to prevent the ceramic shell from cracking; In the high-temperature sintering stage of 800 - 1200 °C, start the temperature equalization algorithm, and compress the axial temperature difference within ±8 °C by adjusting the power ratio of the circumferential heating elements of the heating jacket 25.
[0072] Adaptive cooling: The pressure sensor monitors the metal liquid pressure in the pouring tube 13. When a sudden drop in pressure is detected, the intelligent decision-making module determines that the pouring is completed and immediately starts the circulating water cooling system 26. The cooling rate is dynamically adjusted according to the wall thickness of the casting. The thick-wall area adopts a gradient cooling mode, and the thin-wall area implements rapid cooling.
[0073] Collaborative slag collection: The vibration sensor collects the impact spectrum of the elastic striking rod 6, and the vibration collaboration sub-module performs: Identify the natural frequency of the mold shell through fast Fourier transform and avoid the resonance frequency range of ±2 Hz; When the accumulation of broken slag is detected, automatically increase the rotation speed of the rotating station frame 8 by 10 - 15% to enhance the vibration intensity.
[0074] This system achieves three major breakthroughs through a modular control architecture: Improved adaptability of process parameters: The roasting temperature uniformity is increased by 42% compared with traditional equipment, and the mold shell defect rate is reduced to less than 0.7%; Enhanced dynamic response ability: The pouring pressure fluctuation is controlled within 1 / 3 of the process requirements, and the porosity is reduced by 68%. Intelligent operation and maintenance: The fault self-diagnosis system can predict the failure of transmission components 72 hours in advance, and the overall equipment efficiency (OEE) is increased to 89%.
[0075] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An investment shell casting system, comprising a casting device and a control system, characterized in that: The casting equipment comprises a frame (1), on which a slurry barrel (2), a roasting furnace (3), a cooling barrel (4) and a slag collecting barrel (5) are sequentially installed in a clockwise direction, and the inner wall of the slag collecting barrel (5) is installed with a plurality of regularly distributed elastic striking rods (6), a loading and unloading station is provided on the frame (1) and at a position corresponding to the position between the slurry barrel (2) and the slag collecting barrel (5), a casting frame (7) is installed on the frame (1) in a liftable manner, and a transmission unit is provided on the casting frame (7), and the transmission unit is respectively connected to the circumferentially movable A rotating workstation (8) that can rotate 72° periodically and a rotatable transmission ring gear (9), an inner valve ring (10) and a fixed-point transmission module that cooperates with the transmission ring gear (9) are fixedly installed on the casting frame (7), a valve cylinder (11) is rotatably sleeved on the inner valve ring (10), a steam inlet pipe (12) is connected to the inner valve ring (10) at a position corresponding to the roasting furnace (3), a pouring pipe (13) is connected to the inner valve ring (10) at a position corresponding to the cooling cylinder (4), and three workpiece mounting units are installed on the rotating workstation (8); The control system includes a sensor detection module, an execution control module and an intelligent decision module. The sensor detection module is connected to the execution control module via an industrial bus. The intelligent decision module dynamically coordinates the rotation positioning of the rotary workstation (8), the vibration parameters of the workpiece mounting unit and the temperature field distribution according to the process stage.
2. The investment mold shell casting system according to claim 1, wherein The workpiece mounting unit includes a power shaft (14) driven by a fixed-point transmission module, an oscillation system is connected to the power shaft (14), an oscillation table (15) that can vibrate up and down is installed on the oscillation system, a rotatable mounting shaft (16) is rotatably installed on the inner wall of the oscillation table (15), a casting tube (17) is threadedly installed on the mounting shaft (16), and a plurality of groups of blanks (18) are installed on the casting tube (17), and a flow channel (19) for pouring liquid or steam to pass through is fixedly opened inside the mounting shaft (16), and the flow channel (19) is fixedly connected to the valve cylinder (11) through a connecting pipe (20); A first sealing rod (21) is fixedly mounted at the axis of the slurry cylinder (2), and a second sealing rod (22) is fixedly mounted at the axis of the cooling cylinder (4); A vertically arranged screw lifting module (23) is installed on the frame (1), and the screw lifting module (23) is transmission-connected to the casting frame (7).
3. A investment casting shell casting system according to claim 2, wherein, The top ends of the slurry barrel (2), roasting furnace (3), cooling barrel (4) and slag collecting barrel (5) are open. A heating jacket (25) is installed on the roasting furnace (3). The working temperature of the heating jacket (25) is 1200°C. A circulating water cooling system (26) is installed on the cooling barrel (4). A discharge valve is installed at the bottom of each of the slurry barrel (2), roasting furnace (3), cooling barrel (4) and slag collecting barrel (5).
4. A investment casting shell casting system according to claim 2, wherein, A servo motor (27) is installed on the casting frame (7), an intermittent shaft (28) and a belt shaft (29) are rotatably installed on the casting frame (7), the intermittent shaft (28) is fixedly connected to the rotary work station frame (8), a small pulley is installed on the output shaft end of the servo motor (27), a large pulley is installed on the belt shaft (29), the small pulley is connected to the large pulley through a first synchronous belt, an incomplete gear (30) is installed on the belt shaft (29), a toothed portion is fixedly provided on the incomplete gear (30), a passive gear (31) meshing with the incomplete gear (30) is installed on the intermittent shaft (28), a core shaft (32) is rotatably installed on the inner wall of the intermittent shaft (28), the output shaft end of the servo motor (27) is connected to the core shaft (32) through a second synchronous belt, and the transmission gear ring (9) is fixedly installed on the core shaft (32).
5. A investment casting shell casting system according to claim 4, characterized in that, The radius of the large pulley is 2 to 3 times the radius of the small pulley, the radius of the incomplete gear (30) is the same as that of the passive gear (31), and the central angle corresponding to the toothed portion is 72°.
6. The investment casting shell casting system according to claim 2, wherein The transmission unit includes an eccentric wheel (33) mounted on a power shaft (14), the oscillating table (15) is slidably connected to the rotating work frame (8), a limit spring (34) is mounted on the top surface of the oscillating table (15) and is limited by the rotating work frame (8), a follower wheel (35) is rotatably mounted on the oscillating table (15), the contour of the eccentric wheel (33) is in rolling contact with the wheel surface of the follower wheel (35), and a hollow shaft (36) is rotatably mounted on the rotating work frame (8) The hollow shaft (36) and the power shaft (14) are both provided with front conical teeth, and the two front conical teeth are meshed with each other. A square groove with two ends open is fixedly provided inside the hollow shaft (36). The mounting shaft (16) is rotatably mounted on the oscillation table (15) through a bearing. A connecting groove section is fixedly provided on the mounting shaft (16) and is slidably connected to the square groove. The cross sections of the connecting groove section and the square groove are both regular hexagons. A tail conical tooth is fixedly provided on the tail end of the power shaft (14).
7. A investment casting shell casting system according to claim 5, characterized in that, The fixed-point transmission module includes a fixed frame (37) installed on the casting frame (7), a feed shaft (38) is rotatably installed on the fixed frame (37) and corresponding to the positions of the slurry cylinder (2), the cooling cylinder (4) and the slag collection cylinder (5), a driven gear (39) connected to the transmission gear ring (9) is fixedly installed at the bottom of the feed shaft (38), and a top cone gear meshing with the tail cone gear is fixedly installed at the top of the feed shaft (38).
8. A lost foam mold shell casting system according to claim 2, characterized in that, The mold tube (17) is a hollow tubular structure with two ends open. One end of the mold tube (17) is fixedly provided with a thread. The mounting shaft (16) is fixedly provided with a thread groove adapted to the thread. The length of the first sealing rod (21) is 1.1 to 1.2 times the length of the mold tube (17). The length of the second sealing rod (22) is 0.1 to 0.2 times the length of the mold tube (17). The mounting shaft (16) is internally provided with a heating coil (40), and the inner wall of the flow channel (19) is coated with a high-temperature resistant silicon carbide coating.
9. A investment casting shell casting system according to claim 1, characterized in that, The workpiece mounting unit further includes a cover (41) installed on the rotary station frame (8), and the cover (41) is used for sealing the slurry cylinder (2), the roasting furnace (3), the cooling cylinder (4) and the slag collection cylinder (5).
10. A investment casting shell casting system according to any one of claims 1-9, characterized in that: The sensing and detection module includes a slurry state sensor distributed in the slurry cylinder (2), a multi-zone temperature sensor in the roasting furnace (3), a pressure sensor of the cooling cylinder (4), and a vibration sensor of the slag collection cylinder (5); The execution control module includes a servo drive unit, a heating power adjustment unit, and a cooling flow valve group; The intelligent decision-making module is built with a process database and an adaptive algorithm, and receives sensing data in real time and generates control instructions.
Citation Information
Patent Citations
A mold shell firing device for investment casting
CN117600407B
Cited By
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