Ceramic core additive manufacturing islands and methods of manufacture

Abstract

Ceramic core additive manufacturing island and manufacturing method, relate to the technical field of additive manufacturing, wherein the manufacturing island comprises a ceramic powder buffer area, a ceramic core 3D printing area, a ceramic core powder cleaning area, a ceramic powder recycling area, a ceramic core impregnation area, a ceramic core dip coating area, a ceramic core calcination area, a ceramic core buffer area, a material transfer system and a central control system. The present application can reduce the waste of ceramic powder, shorten the manufacturing cycle of ceramic core, improve the precision and surface quality of ceramic core, and improve the intelligent and digital level of production process. Meanwhile, the present application also discloses a ceramic core additive manufacturing method.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and more particularly to a ceramic core additive manufacturing island and manufacturing method. Background Technology

[0002] Ceramic cores are critical components in the investment casting process of complex parts such as aero-engine turbine blades, and their dimensional accuracy and surface quality directly affect the forming quality of the casting. In recent years, additive manufacturing technology has been applied in the field of ceramic core manufacturing due to its advantage of eliminating the need for molds. This technology eliminates the mold manufacturing process, directly processing ceramic powder, which can shorten the manufacturing cycle, improve the accuracy of complex castings, reduce the weight of blanks, and shorten the new product development cycle. However, when forming ceramic cores using additive manufacturing technology, a large amount of ceramic powder needs to be laid out during the 3D printing process. After forming, the ceramic core blank needs to be removed from the powder. If the excess ceramic powder is discarded directly, it will result in a large waste of raw materials, increase manufacturing costs, and prolong the technology promotion time.

[0003] Furthermore, due to the complexity of aero-turbine blades and outdated casting technology, my country lags significantly behind developed countries in the digitalization and intelligentization of large-scale complex casting. Currently, most enterprises' ceramic core production processes suffer from low levels of automation in core making, powder cleaning, impregnation, coating, and calcination. Some processes still rely on manual operation, and process data is collected manually, failing to form a systematic and intelligent production process. This results in low production efficiency, uncontrolled product quality, and a high scrap rate for ceramic cores. Therefore, there is an urgent need to develop a system integration of automated devices based on additive manufacturing technology for ceramic printing, powder cleaning and recovery, green body impregnation, coating application, and material transfer. This would enable intelligent automation of the entire process in ceramic core production, including core making, strengthening, and calcination, thereby improving the precision and surface quality of ceramic cores and reducing raw material consumption. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a ceramic core additive manufacturing island and manufacturing method, which can reduce ceramic powder waste, shorten the ceramic core manufacturing cycle, improve the precision and surface quality of ceramic cores, and enhance the intelligence and digitalization level of the production process.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] The ceramic core additive manufacturing island includes:

[0007] The ceramic powder buffer area is equipped with a ceramic powder storage rack for storing ceramic powder.

[0008] The ceramic core 3D printing area is equipped with a 3D ceramic printer, which is used to 3D print ceramic powder into ceramic core blanks.

[0009] The ceramic core cleaning area is equipped with post-processing equipment to remove excess ceramic powder from the ceramic core green body and to remove the ceramic core green body.

[0010] The ceramic powder recycling area is equipped with a vibrating screen and powder transfer equipment to recycle the ceramic powder removed from the ceramic core cleaning area. After being screened by the vibrating screen, the powder is transported to the ceramic core 3D printing area through the powder transfer equipment to realize the recycling of ceramic powder.

[0011] The ceramic core impregnation area is equipped with an impregnation liquid storage rack, an impregnation tank and drying equipment, which are used to place the impregnation liquid and to perform impregnation and subsequent drying processes on the cleaned ceramic core green body.

[0012] The ceramic core dip-coating area is equipped with a paint storage rack, dip-coating tank and curing equipment, which are used to place paint, dip-coat the surface of the dried ceramic core blank with paint and perform curing treatment.

[0013] The ceramic core calcination zone is equipped with a high-temperature calcination furnace, which is used to calcine the cured ceramic core green body at high temperature to obtain the ceramic core.

[0014] The ceramic core buffer area is equipped with a ceramic core storage rack for storing calcined ceramic cores according to different sizes and specifications.

[0015] Material transfer system, used to transfer ceramic powder, ceramic core green body and ceramic core between different areas;

[0016] The central control system communicates with each device to control its operation, achieve coordinated operation between devices, and monitor the status of each device.

[0017] Preferably, the material transfer system includes a hydraulic transfer trolley, which can be freely lifted and lowered to realize the transfer of ceramic powder, ceramic core green body and ceramic core between different areas.

[0018] Preferably, the post-processing equipment includes an adjustable pressure air gun and a brush for rapid powder removal of the ceramic core green body.

[0019] Preferably, the drying equipment includes a forced-air drying oven for rapidly drying the impregnated ceramic core green body.

[0020] Preferably, the curing equipment includes a constant temperature and humidity curing chamber for curing the dip-coated ceramic core blanks at a constant temperature and humidity.

[0021] Preferably, the bottom of the dip coating tank is equipped with a stirring paddle for stirring the coating.

[0022] Preferably, the high-temperature calcining furnace is equipped with an exhaust device to discharge the gases generated during the calcination of the ceramic core.

[0023] Preferably, it also includes a ceramic core dimensional accuracy detection system for automatically detecting the calcined ceramic core and feeding the detection information back to the central control system.

[0024] A ceramic core additive manufacturing method, applied to the aforementioned ceramic core additive manufacturing island, includes the following steps:

[0025] Based on the three-dimensional model of the ceramic core, the ceramic powder is 3D printed into a ceramic core green body using a 3D ceramic printer.

[0026] The ceramic core green body is cleaned to remove excess ceramic powder, and then the ceramic core green body is removed.

[0027] The ceramic powder removed during the recycling process is screened by a vibrating screen and then transported to the ceramic core 3D printing area for recycling.

[0028] The ceramic core blanks after powder removal are impregnated and then dried.

[0029] The surface of the dried ceramic core blank is coated with a paint and then cured.

[0030] The cured ceramic core blank is transferred to a high-temperature calcining furnace and calcined at high temperature according to the required calcination parameters to obtain the ceramic core.

[0031] The dimensional accuracy of the calcined ceramic core is checked.

[0032] Preferably, in the high-temperature calcination step, a high-temperature calcination furnace equipped with an exhaust device is used to exhaust the gas generated during the calcination of the ceramic core green body.

[0033] After adopting the above technical solution, the beneficial effects of the present invention are:

[0034] This invention discloses a ceramic core additive manufacturing island and its manufacturing method. The ceramic core additive manufacturing island provided by this invention achieves a closed-loop flow of ceramic powder from storage and printing to cleaning and recycling by setting up a ceramic powder buffer area, a ceramic core 3D printing area, a ceramic core powder cleaning area, and a ceramic powder recycling area. After excess ceramic powder is removed from the ceramic core green body in the ceramic core powder cleaning area, the recycled ceramic powder is sieved by a vibrating screen and transported to the ceramic core 3D printing area by a powder transfer device for recycling. This avoids the waste of raw materials caused by direct disposal of ceramic powder and reduces the manufacturing cost of ceramic cores. Simultaneously, the ceramic powder recycling process is closely integrated with the printing process, eliminating the need for manual collection and transfer, and shortening the ceramic core manufacturing cycle.

[0035] The ceramic core additive manufacturing island is equipped with a ceramic core impregnation zone, a ceramic core coating zone, a ceramic core calcination zone, and a ceramic core buffer zone. This allows the cleaned ceramic core blanks to undergo impregnation, drying, coating, curing, and high-temperature calcination sequentially, reducing manual intervention between processes, ensuring the integrity of the ceramic core blanks during transfer and strengthening, and improving the dimensional accuracy and surface quality of the ceramic cores. The material transfer system transports ceramic powder, ceramic core blanks, and ceramic cores between the zones. The central control system communicates with and coordinates the operation of each piece of equipment, ensuring that each process proceeds in an orderly manner according to the preset flow, thus enhancing the intelligence and digitalization of the ceramic core manufacturing process. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Figure 1 This is a layout diagram of the ceramic core additive manufacturing island in Embodiment 1 of the present invention;

[0038] Figure 2 This is a process flow diagram of the ceramic core additive manufacturing island. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] Example 1

[0041] like Figures 1 to 2 As shown in the figure, this embodiment discloses a ceramic core additive manufacturing island, including:

[0042] The ceramic powder buffer area is equipped with a ceramic powder storage rack for storing ceramic powder.

[0043] The ceramic core 3D printing area is equipped with a 3D ceramic printer, which is used to 3D print ceramic powder into ceramic core blanks.

[0044] The ceramic core cleaning area is equipped with post-processing equipment to remove excess ceramic powder from the ceramic core green body and to remove the ceramic core green body.

[0045] The ceramic powder recycling area is equipped with a vibrating screen and powder transfer equipment to recycle the ceramic powder removed from the ceramic core cleaning area. After being screened by the vibrating screen, the powder is transported to the ceramic core 3D printing area through the powder transfer equipment to realize the recycling of ceramic powder.

[0046] The ceramic core impregnation area is equipped with an impregnation liquid storage rack, an impregnation tank and drying equipment, which are used to place the impregnation liquid and to perform impregnation and subsequent drying processes on the cleaned ceramic core green body.

[0047] The ceramic core dip-coating area is equipped with a paint storage rack, dip-coating tank and curing equipment, which are used to place paint, dip-coat the surface of the dried ceramic core blank with paint and perform curing treatment.

[0048] The ceramic core calcination zone is equipped with a high-temperature calcination furnace, which is used to calcine the cured ceramic core green body at high temperature to obtain the ceramic core.

[0049] The ceramic core buffer area is equipped with a ceramic core storage rack for storing calcined ceramic cores according to different sizes and specifications.

[0050] Material transfer system, used to transfer ceramic powder, ceramic core green body and ceramic core between different areas;

[0051] The central control system communicates with each device to control its operation, achieve coordinated operation between devices, and monitor the status of each device.

[0052] In this embodiment, the ceramic core additive manufacturing island operates by storing ceramic powder in a ceramic powder buffer area. A 3D ceramic printer then 3D prints the ceramic powder into a ceramic core blank. After printing, the ceramic core blank is sent to a ceramic core cleaning area. A post-processing device removes excess ceramic powder from the blank and takes it out. The removed ceramic powder is not discarded but enters a ceramic powder recycling area. After being sieved by a vibrating screen, it is transported back to the ceramic core 3D printing area by a powder transfer device, thus recycling the ceramic powder. This reduces raw material waste and eliminates the need for manual collection and transfer.

[0053] After being cleaned of powder, the ceramic core green body then enters the ceramic core impregnation zone, where it is impregnated in the impregnation tank and dried by drying equipment to improve the strength of the green body and prevent chipping or breakage during subsequent transportation. The dried ceramic core green body is then transferred to the ceramic core coating zone, where it is coated with a coating material and then cured by curing equipment to ensure stable coating adhesion. After curing, the ceramic core green body is sent to the high-temperature calcination furnace in the ceramic core calcination zone for high-temperature calcination according to preset parameters, finally obtaining the ceramic core, which is then stored in the ceramic core buffer area.

[0054] Throughout the process, the material transfer system is responsible for the flow of ceramic powder, ceramic core green body, and ceramic core between various areas. The central control system communicates with each piece of equipment, uniformly schedules the operation of each process, and monitors the status of each piece of equipment, so that each link is connected in an orderly manner, reducing manual intervention, thereby improving the manufacturing efficiency and product consistency of ceramic cores, while making the production process more controllable.

[0055] In this embodiment, the material transfer system includes a hydraulic transfer trolley, which can be freely raised and lowered to facilitate the transfer of ceramic powder, ceramic core green bodies, and ceramic cores between different areas. The hydraulic transfer trolley's ability to adjust the load-bearing platform according to the height of the worktable in each area ensures stable loading and unloading of ceramic core green bodies during transfer, reducing bumps or shaking caused by height mismatches. Since the ceramic core green bodies have low strength after powder cleaning, their stability during transfer directly affects the subsequent impregnation and calcination effects. The lifting function of the hydraulic transfer trolley allows for smooth docking of the green bodies with the equipment in each area during loading and unloading, preventing chipping or breakage due to tilting or impact. Through the orderly transfer of ceramic powder and ceramic core green bodies between areas using the hydraulic transfer trolley, manual handling is no longer required, reducing human interference during transfer, improving the efficiency and accuracy of material flow, and ensuring smooth connection between various processes within the ceramic core manufacturing island.

[0056] The post-processing equipment includes an adjustable-pressure air gun and a brush for rapid powder removal from ceramic core blanks. After 3D printing, a large amount of excess ceramic powder adheres to the surface and internal pores of the ceramic core blank. If not removed promptly, this will affect the effectiveness of subsequent impregnation and coating processes. During powder removal, the adjustable-pressure air gun controls the airflow to blow away loose ceramic powder adhering to the surface and grooves of the ceramic core blank. The airflow pressure can be flexibly adjusted according to the structural strength of the ceramic core blank and the degree of powder adhesion, ensuring effective powder removal while avoiding damage to the ceramic core blank due to excessive air pressure. For localized powder that is difficult to remove with the air gun, a brush is used for auxiliary cleaning. The brush can reach deep into the small gaps and pores of the ceramic core blank to remove residual ceramic powder. Through the combined use of the air gun and brush, the ceramic core blank can be powder-removed in a short time, reducing the interference of powder residue on subsequent processes and improving powder removal efficiency and the surface cleanliness of the ceramic core blank.

[0057] The drying equipment includes a forced-air drying oven for rapidly drying impregnated ceramic core green bodies. After impregnation, the internal pores of the ceramic core green body are filled with the impregnation liquid, making the green body generally damp. If it directly enters subsequent processes, the residual impregnation liquid on the surface will affect the impregnation effect, and the green body's own strength will be insufficient to withstand the shaking during transportation. The forced-air drying oven continuously supplies hot air to maintain a uniform temperature environment inside the oven, promoting the rapid evaporation of the impregnation liquid inside and on the surface of the ceramic core green body. During the drying process, the hot air continuously circulates, removing moisture from the area surrounding the ceramic core green body and avoiding uneven shrinkage caused by localized drying. This allows the impregnated ceramic core green body to dry in a shorter time, significantly improving its strength. The dried ceramic core green body no longer relies on the temporary support of the impregnation liquid, allowing it to enter the impregnation and firing processes more stably. This reduces the risk of chipping and breakage caused by transportation or waiting, while also shortening the overall manufacturing cycle.

[0058] The curing equipment includes a constant temperature and humidity curing chamber for curing ceramic core green bodies after dip coating. After dip coating, the surface coating of the ceramic core green body contains a significant amount of moisture. If placed directly in the natural environment, the surface loses water much faster than the interior, easily causing uneven coating shrinkage, which can lead to cracking or peeling of the ceramic core green body. The constant temperature and humidity curing chamber maintains the temperature and humidity within a set range, placing the ceramic core green body in a relatively stable environment. The moisture in the coating evaporates slowly and evenly, avoiding surface defects caused by excessively rapid local drying. During the curing process, the ceramic core green body is not directly exposed to flowing air, reducing the interference of external environmental fluctuations on its surface condition. The coating can cure smoothly and adhere tightly to the surface of the ceramic core green body, ensuring the uniformity and density of the coating, thereby guaranteeing the dimensional accuracy and surface quality of the ceramic core.

[0059] A stirring paddle is installed at the bottom of the dip-coating tank to agitate the coating material. During the dip-coating process, the ceramic core green body relies on the coating material to form a uniform coverage on its surface. However, after a period of settling, the solid components in the coating material gradually settle downwards, causing the upper layer of coating to become thinner and the lower layer to become thicker, directly affecting the dip-coating effect. The stirring paddle, located at the bottom of the dip-coating tank, continuously or intermittently rotates to drive the flow of the coating material within the tank, ensuring that the components in the coating material are uniformly dispersed and preventing sedimentation and stratification caused by prolonged settling. When the stirring paddle is working, the coating material circulates within the tank, and the solid particles deposited at the bottom are carried back into the upper layer of coating material. This results in a more uniform coating concentration at all locations within the dip-coating tank, ensuring that the surface of the ceramic core green body comes into contact with a uniformly composed coating material after immersion, leading to a more stable coating thickness and density. Through continuous agitation by the stirring paddle, the coating material remains in a usable uniform state throughout the dip-coating process, reducing coating quality fluctuations caused by coating sedimentation and improving the uniformity of the coating on the surface of the ceramic core.

[0060] The high-temperature calcining furnace is equipped with an exhaust system to remove gases generated during the calcination of ceramic cores. During the high-temperature calcination process, residual impregnation liquid, coating components, and organic matter inside the ceramic core green body gradually decompose, releasing gases. If these gases accumulate continuously inside the furnace, they can not only alter the furnace atmosphere but also adversely affect the surface condition of the ceramic core, potentially even posing safety hazards. The exhaust system operates continuously during calcination, promptly removing the generated gases from the furnace and maintaining a stable atmosphere inside the high-temperature calcining furnace. As gases are continuously extracted, localized excessive gas concentrations are prevented, allowing the calcination process to proceed smoothly according to preset temperature parameters. This ensures the full removal of organic matter from the ceramic core green body and the successful growth of inorganic particles, resulting in ceramic cores with improved strength and density, while simultaneously reducing safety risks during the calcination process.

[0061] The ceramic core additive manufacturing island disclosed in this embodiment also includes a ceramic core dimensional accuracy detection system for automated detection of the calcined ceramic core and feedback of the detection information to the central control system. After high-temperature calcination, the dimensions of the ceramic core may deviate due to shrinkage or deformation, directly affecting the accuracy of subsequent castings. The detection system automatically detects the calcined ceramic core, obtains the actual dimensional data of the ceramic core, and feeds the detection information back to the central control system. The central control system determines whether the ceramic core meets the dimensional requirements based on the feedback detection information, facilitating timely adjustment of process parameters in previous processes and reducing the occurrence of similar dimensional deviations in subsequent batches. Through the cooperation of the detection system and the central control system, the dimensional accuracy of the ceramic core is effectively monitored, avoiding the lag and errors caused by manual measurement, improving the closed-loop control capability of the ceramic core manufacturing process, and ensuring greater dimensional consistency of the final ceramic core.

[0062] Example 2

[0063] This embodiment discloses a ceramic core additive manufacturing method, applied to the ceramic core additive manufacturing island of the above embodiment, including the following steps:

[0064] Based on the three-dimensional model of the ceramic core, the ceramic powder is 3D printed into a ceramic core green body using a 3D ceramic printer.

[0065] The ceramic core green body is cleaned to remove excess ceramic powder, and then the ceramic core green body is removed.

[0066] The ceramic powder removed during the recycling process is screened by a vibrating screen and then transported to the ceramic core 3D printing area for recycling.

[0067] The ceramic core blanks after powder removal are impregnated and then dried.

[0068] The surface of the dried ceramic core blank is coated with a paint and then cured.

[0069] The cured ceramic core blank is transferred to a high-temperature calcining furnace and calcined at high temperature according to the required calcination parameters to obtain the ceramic core.

[0070] The dimensional accuracy of the calcined ceramic core is checked.

[0071] The ceramic core additive manufacturing method disclosed in this embodiment ensures a seamless connection between all stages of ceramic core production, from forming to inspection. First, based on the three-dimensional model of the ceramic core, a 3D ceramic printer is used to 3D print ceramic powder into a ceramic core green body. After printing, the ceramic core green body is cleaned to remove excess ceramic powder from its surface, and then removed. The ceramic powder removed during the cleaning process is not discarded directly but is sieved through a vibrating screen and then recycled back to the ceramic core 3D printing area. This reduces raw material consumption and the on-site management burden caused by powder accumulation after cleaning.

[0072] The cleaned ceramic core green body is then impregnated and dried to improve its strength. After drying, the surface of the green body is coated with a paint, cured, and then transferred to a high-temperature calcining furnace for firing at the required parameters, ultimately yielding the ceramic core. Throughout the process, each step is interconnected, reducing manual handling and waiting time, and significantly improving the manufacturing efficiency and dimensional consistency of the ceramic core.

[0073] In this embodiment, a high-temperature calcination furnace equipped with an exhaust system is used in the high-temperature calcination step to remove the gases generated during the calcination of the ceramic core green body. After the ceramic core green body enters the high-temperature calcination furnace, as the furnace temperature gradually increases, the residual impregnation liquid, coating components, and organic matter in the green body begin to decompose and release gases. If these gases are not removed in time, they will accumulate in the furnace, affecting the uniformity of the furnace temperature and potentially interfering with the surface quality of the ceramic core green body. The exhaust system operates continuously during the calcination process, continuously drawing the generated gases out of the furnace, maintaining a stable atmosphere, and allowing the calcination process to proceed smoothly according to the set parameters. Timely gas removal ensures that the organic matter inside the ceramic core green body is fully removed, and inorganic particles grow normally, resulting in a ceramic core with better strength and density. Simultaneously, the safety of the high-temperature calcination process is also improved.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ceramic core additive manufacturing island, characterized in that, include: The ceramic powder buffer area is equipped with a ceramic powder storage rack for storing ceramic powder. The ceramic core 3D printing area is equipped with a 3D ceramic printer, which is used to 3D print ceramic powder into ceramic core blanks. The ceramic core cleaning area is equipped with post-processing equipment to remove excess ceramic powder from the ceramic core green body and to remove the ceramic core green body. The ceramic powder recycling area is equipped with a vibrating screen and powder transfer equipment to recycle the ceramic powder removed from the ceramic core cleaning area. After being screened by the vibrating screen, the powder is transported to the ceramic core 3D printing area through the powder transfer equipment to realize the recycling of ceramic powder. The ceramic core impregnation area is equipped with an impregnation liquid storage rack, an impregnation tank and drying equipment, which are used to place the impregnation liquid and to perform impregnation and subsequent drying of the cleaned ceramic core green body. The ceramic core dip-coating area is equipped with a paint storage rack, dip-coating tank and curing equipment, which are used to place paint, dip-coat the surface of the dried ceramic core blank with paint and perform curing treatment. The ceramic core calcination zone is equipped with a high-temperature calcination furnace, which is used to calcine the cured ceramic core green body at high temperature to obtain the ceramic core. The ceramic core buffer area is equipped with a ceramic core storage rack for storing calcined ceramic cores according to different sizes and specifications. Material transfer system, used to transfer ceramic powder, ceramic core green body and ceramic core between different areas; The central control system communicates with each device to control its operation, achieve coordinated operation between devices, and monitor the status of each device.

2. The ceramic core additive manufacturing island as described in claim 1, characterized in that, The material transfer system includes a hydraulic transfer trolley, which can be freely lifted and lowered to realize the transfer of ceramic powder, ceramic core green body and ceramic core between different areas.

3. The ceramic core additive manufacturing island as described in claim 1, characterized in that, The post-processing equipment includes an adjustable pressure air gun and a brush for rapid powder removal from ceramic core green bodies.

4. The ceramic core additive manufacturing island as described in claim 1, characterized in that, The drying equipment includes a forced-air drying oven, used for rapid drying of impregnated ceramic core green bodies.

5. The ceramic core additive manufacturing island as described in claim 1, characterized in that, The curing equipment includes a constant temperature and humidity curing chamber, which is used to cure the dip-coated ceramic core blanks at a constant temperature and humidity.

6. The ceramic core additive manufacturing island as described in claim 1, characterized in that, The bottom of the dip coating tank is equipped with a stirring paddle for stirring the coating.

7. The ceramic core additive manufacturing island as described in claim 1, characterized in that, The high-temperature calcining furnace is equipped with an exhaust system to remove the gases generated during the calcination of the ceramic core.

8. The ceramic core additive manufacturing island as described in claim 1, characterized in that, It also includes a ceramic core dimensional accuracy detection system, which is used to automatically detect the calcined ceramic core and feed the detection information back to the central control system.

9. A method for additive manufacturing of ceramic cores, characterized in that, The method of applying the ceramic core additive manufacturing island as described in any one of claims 1 to 8 includes the following steps: Based on the three-dimensional model of the ceramic core, the ceramic powder is 3D printed into a ceramic core green body using a 3D ceramic printer. The ceramic core green body is cleaned to remove excess ceramic powder and then removed. The ceramic powder removed during the recycling process is screened by a vibrating screen and then transported to the ceramic core 3D printing area for recycling. The cleaned ceramic core blank is impregnated and then dried. The dried ceramic core blank is coated with a paint and then cured. The cured ceramic core blank is transferred to a high-temperature calcining furnace and calcined at high temperature according to the required calcination parameters to obtain the ceramic core. The dimensional accuracy of the calcined ceramic core is checked.

10. The additive manufacturing method for ceramic cores as described in claim 9, characterized in that, In the high-temperature calcination step, a high-temperature calcination furnace equipped with an exhaust device is used to remove the gas generated during the calcination of the ceramic core green body.

Images