Ceramic cutter string casting mold with chip breaker groove and forming method

Abstract

The invention provides a ceramic cutter string casting mold with chip breaker grooves and a forming method, and belongs to the technical field of ceramic cutter preparation. The mold comprises a plurality of tool pouring modules connected in series through a series pouring pipeline, the series pouring pipeline comprises a pouring pipeline and an exhaust pipeline, each tool pouring module comprises a pouring cavity fixedly connected with the series pouring pipeline, and a tool forming groove is formed in each pouring cavity; the pouring cavity is a cavity with a lateral opening, the lateral opening is used for installing a tool forming groove body, and cavity through holes communicated with the series pouring pipeline are formed in the upper face and the lower face respectively. The cutter forming groove body is a groove body with an upper opening, the bottom is provided with a groove body through hole communicated with the series pouring pipeline, and the bottom of the inner surface of the groove body is provided with a chip breaker groove forming face. By designing the cutter forming groove body, the geometrical characteristics of the cutter chip breaker groove can be accurately regulated and controlled. Dozens of cutter blanks with chip breaker grooves can be formed at a time, the groove profile size and the contour precision are highly consistent, and the micro-crack defect caused by grinding is avoided.

Description

Technical Field

[0001] This invention belongs to the field of ceramic cutting tool preparation technology, and particularly relates to a ceramic cutting tool casting mold with chip breaking groove and a forming method. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] In high-speed cutting, dry cutting, and machining of difficult-to-machine materials, ceramic cutting tools are indispensable key tools in advanced manufacturing technologies due to their superior high-temperature hardness and excellent wear resistance. However, due to the mechanical properties and cutting edge design of ceramic cutting tools, they do not readily incorporate chip breaker grooves during metal cutting. Long, ribbon-like chips tend to entangle on the workpiece or tool, reducing the surface quality of the machined surface, accelerating tool wear, and the sharp chip edges are difficult to clean, potentially interfering with the machining process. Therefore, chip breaker grooves are typically added to ceramic cutting tools to promote chip breakage.

[0004] Current methods for processing chip breaker grooves include first preparing ceramic cutting tools without chip breaker grooves and then preparing chip breaker grooves through machining, and 3D printing. However, these methods have high equipment costs and low production efficiency. Furthermore, machining high-hardness ceramic cutting tools can easily introduce microcracks, while 3D printing can easily leave residual pores or deformation defects that affect density and has low production efficiency, making it difficult to use for large-scale production. Summary of the Invention

[0005] To address the current technical problems, the purpose of this invention is to provide a ceramic cutting tool casting mold with chip breaker grooves and a molding method. By using gel injection molding technology, ceramic cutting tools with chip breaker grooves can be mass-produced, significantly improving production efficiency and reducing costs, while ensuring the consistency of the chip breaker groove precision and mechanical properties. This quickly meets the needs of large-scale industrial processing, achieving a dual guarantee of production capacity and quality.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: In a first aspect, a ceramic tool casting mold with chip breaking grooves includes multiple tool casting modules connected in series via a casting pipe, wherein the casting pipe includes a casting pipe and an venting pipe, and the tool casting module includes a casting cavity fixedly connected to the casting pipe, wherein a tool forming groove is installed in the casting cavity. The casting cavity is a side-opening cavity, which is used to install the tool forming groove. The upper and lower surfaces are respectively provided with cavity through holes that connect to the casting pipe. The tool forming groove is a top-opening groove with a groove through hole at the bottom that connects to the casting pipe. The bottom of the inner surface of the groove is provided with a chip breaking groove forming surface.

[0007] Secondly, a method for casting ceramic tools with chip breaker grooves based on the above-mentioned ceramic tool casting mold with chip breaker grooves includes the following steps: S1. Install the tool forming groove into the casting cavity; S2. Inject ceramic slurry into the casting cavity through the casting pipe and exhaust gas through the venting pipe; allow the ceramic slurry to solidify in the tool forming groove. S3. Remove the tool forming groove from the casting cavity, and remove the solidified ceramic tool blank from the tool forming groove; S4. Dry and sinter the green body to obtain a ceramic cutting tool with chip breaking grooves.

[0008] The beneficial effects of this invention are as follows: 1. This invention combines gel casting with the design of ceramic cutting tools featuring chip-breaking grooves. Gel casting involves filling the mold with a low-viscosity slurry. By designing the tool forming groove, particularly the shape, size parameters, and surface texture of the chip-breaking groove forming surface, the geometric characteristics of the chip-breaking groove can be precisely controlled, thereby producing ceramic cutting tools with different structural forms to meet the needs of diverse cutting conditions. It can achieve high-precision replication of complex three-dimensional structures with high structural accuracy. Using a multi-cavity mold to simultaneously pour a homogeneous slurry with high solid content, dozens of tool blanks with chip-breaking grooves can be formed in one go. The groove dimensions and contour accuracy are highly consistent, eliminating batch deviations common in traditional processes, meeting the high-throughput requirements of industrial production, and reducing equipment costs. After sintering, the chip-breaking grooves do not require further grinding, significantly reducing material waste and process time. Compared to the "cold pressing + sintering followed by grooving" method, near-net-shape forming solves the problems of high cost and easy introduction of microcracks in machining chip-breaking grooves, further improving product lifespan. Compared to 3D printing, this invention is less prone to defects such as pores and deformation, and can directly form complex chip-breaking grooves, taking into account both excellent mechanical properties and large-scale production efficiency.

[0009] 2. The tool string casting method provided by the present invention can be adapted to mainstream tool ceramic materials such as ZTA, Si3N4, and Al2O3-TiC. Only the slurry formula needs to be adjusted to switch product types without changing the mold or core equipment, which can meet the needs of multi-variety and high-throughput production. Attached Figure Description

[0010] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0011] Figure 1 This is a schematic diagram of the structure of the ceramic tool casting mold with chip breaking groove in Embodiment 1 of the present invention.

[0012] Figure 2This is a partial structural schematic diagram of the ceramic cutting tool casting mold with chip breaking groove in Embodiment 1 of the present invention.

[0013] Figure 3 This is a schematic diagram of the tool forming groove in Embodiment 1 of the present invention.

[0014] Figure 4 This is a schematic diagram of the structure of the ceramic tool blank in Embodiment 1 of the present invention.

[0015] Among them: 1. Gating gate; 2. Main gating pipe; 3. Vent; 4. Main venting pipe; 5. Overflow vent; 6. Overflow cavity; 7. Tool forming groove; 8. Gating cavity; 9. Venting pipe; 10. Gating pipe; 29. ​​Pull-out part; 30. Chip breaking groove forming surface; 31. Groove venting through hole; 32. Groove gating through hole; 33. Tool rounded corner forming surface; 34. Inner surface of the groove; 38. Green chip breaking groove; 39. Green rounded corner. Detailed Implementation

[0016] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] One or more embodiments of the present invention provide a ceramic tool casting mold with chip breaking groove, comprising multiple tool casting modules connected in series by a casting pipe, wherein the casting pipe includes a casting pipe and an exhaust pipe, and the tool casting module includes a casting cavity fixedly connected to the casting pipe, wherein a tool forming groove is installed in the casting cavity; The casting cavity is a side-opening cavity, which is used to install the tool forming groove. The upper and lower surfaces are respectively provided with cavity through holes that connect to the casting pipe. The tool forming groove is a top-opening groove with a groove through hole at the bottom that connects to the casting pipe. The bottom of the inner surface of the groove is provided with a chip breaking groove forming surface.

[0019] In the above structure, by designing the tool forming groove, especially the shape, size parameters and surface texture of the chip breaker forming surface, the geometric characteristics of the tool chip breaker can be precisely controlled to meet the needs of diverse cutting conditions. It can achieve high-precision replication of complex three-dimensional structures with high structural accuracy; and multiple blanks can be formed at one time with highly consistent groove size and contour accuracy, meeting the high throughput requirements of industrialization with low equipment cost.

[0020] Optionally, the multiple casting modules connected in series form a module group, and the casting pipes of the multiple module groups are connected in parallel at the upper end to the main casting pipe; the main casting pipe includes a casting main pipe and an exhaust main pipe; the casting main pipe connects to multiple casting pipes, and the exhaust main pipe connects to multiple exhaust pipes, thereby improving the preparation efficiency.

[0021] Optionally, the top of each of the multiple module groups is connected to an overflow cavity, the overflow cavity is provided with an exhaust port, and the overflow cavity is connected to the main pouring pipe; it is used to accommodate excess ceramic slurry and prevent insufficient slurry in the uppermost pouring cavity.

[0022] Optionally, a pouring port is provided at the top of the main pouring pipe, and an exhaust port is provided at the top of the main exhaust pipe; the pouring port is used to pour ceramic slurry from the outside, and the exhaust port is used to discharge the gas squeezed out by the ceramic slurry from the casting mold.

[0023] Optionally, the cavity through hole and the trough through hole are respectively aligned with the cascade pipe; the cavity through hole and the trough through hole respectively include a grouting through hole and an venting through hole, so that the cascade pipe and the cavity through hole and the trough through hole form a vertically connected channel.

[0024] Optionally, the through hole of the tank is located in the center of the bottom of the tank, and the chip breaking groove forming surface is located around the through hole of the tank; so that the ceramic slurry can fully fill the chip breaking groove forming surface and avoid local residual air bubbles causing defects in the green body.

[0025] Optionally, the sidewall of the inner surface of the tank includes a rounded corner forming surface for the cutting tool; the outline size of the blank enclosed by the inner surface of the tank is 15-20% larger than the size of the sintered ceramic cutting tool, so as to facilitate shrinkage to the standard ceramic cutting tool size after sintering; and parameters such as different materials and different solid phase contents of ceramic slurry also have a certain influence on the sintering shrinkage rate of the blank after forming, so it is necessary to adjust the inner wall size of the chip breaking groove pusher according to the shrinkage rate.

[0026] When the green body is pulled out of the casting cavity after the room temperature gelation process, the green body that has just completed the gelation process has not been dried and has low strength and is in a colloidal state. Moreover, the casting cavity is side-opening, and the gel at the upper and lower through holes is subjected to tangential force during the pulling process, thereby removing excess material from the surface of the green body and forming a green body surface that meets the requirements for ceramic tool forming.

[0027] One or more embodiments of the present invention provide a method for casting ceramic tools with chip breaker grooves based on the above-mentioned ceramic tool casting mold with chip breaker grooves, comprising the following steps: S1. Install the tool forming groove into the casting cavity; S2. Inject ceramic slurry into the casting cavity through the casting pipe and exhaust gas through the venting pipe; allow the ceramic slurry to solidify in the tool forming groove. S3. Remove the tool forming groove from the casting cavity, and remove the solidified ceramic tool blank from the tool forming groove; S4. Dry and sinter the green body to obtain a ceramic cutting tool with chip breaking grooves.

[0028] In the above process, the surface of the chip breaker groove does not need to be ground after sintering, which greatly reduces material waste and process time, and avoids the risk of microcrack defects introduced by grinding, thus further improving the service life of the product. This method is applicable to mainstream tool ceramic materials, and only the slurry formula needs to be adjusted to switch product types without changing the mold or core equipment, making it suitable for high-throughput production needs.

[0029] Optionally, in S1, the through holes of the tank and the through holes of the cavity are aligned with the casting pipe to form a vertically connected pipe. The ceramic slurry injected from the casting pipe can fall directly to the bottom casting cavity, thereby improving the casting rate and the venting rate.

[0030] Optionally, in S2, the viscosity of the ceramic slurry is 0.1~1 Pa·s, and the pH is 7~12; this facilitates thorough dispersion of the slurry. A viscosity below 1 Pa·s ensures sufficient fluidity, allowing the slurry to fill the mold smoothly and expel air bubbles, resulting in a defect-free, high-density ceramic body. At a pH of 7~12, the absolute value of the slurry's Zeta potential is large, leading to greater electrostatic repulsion between ceramic particles, smaller van der Waals forces, and less slurry aggregation, resulting in better dispersion. Good dispersion reduces slurry viscosity, which is beneficial for casting slurries with high solid content, reducing aggregation and air bubbles, and making the body uniform and dense, thereby improving the strength of the sintered body.

[0031] Optionally, in S2, the raw materials for preparing the ceramic slurry include ceramic powder, monomers, crosslinking agents, pH adjusters, dispersants, initiators, catalysts, and water. The mass ratio of the ceramic powder, monomers, and dispersants is 100:(2~6):(0.6~0.9), and the mass ratio of the monomers and crosslinking agents is (5~15):1. The organic monomers in the slurry undergo crosslinking reaction and polymerization to form a three-dimensional network structure, thereby solidifying and molding in situ. The slurry is then poured from the pouring port into a chip-breaking groove ceramic tool casting mold to obtain a uniform, dense, and high-strength chip-breaking groove ceramic tool blank.

[0032] Optionally, the ceramic powder includes one or more of ZTA powder, Si3N4 powder, and Al2O3-TiC powder, conforming to the types of mainstream knife ceramic materials; the monomer includes one or more of acrylamide, methacrylamide, and N-hydroxy-methylacrylamide, used to form a cross-linked organic polymer network, so that the ceramic knife blank maintains the same shape as the knife forming groove; the cross-linking agent includes one or more of N,N-methylenebisacrylamide, polyethylene glycol diacrylate, and ethylene glycol dimethacrylate, used to promote the formation of a cross-linked network of monomers; the pH adjuster includes one or more of ammonia, sodium hydroxide, and hydrochloric acid, to facilitate the full dispersion of the slurry; the dispersant includes one or more of ammonium polyacrylate, polyethylene glycol, and tetramethylammonium hydroxide, to facilitate the full dispersion of the slurry; the initiator includes one or more of ammonium persulfate, ammonium bisulfate, and triethylenetetramine, used to initiate the cross-linking polymerization reaction between the monomer and the cross-linking agent, so that the slurry is solidified in situ within the mold; the catalyst includes one or more of tetramethylethylenediamine, triethanolamine, and dimethylaniline.

[0033] Optionally, in S2, the curing method includes: allowing the gel in the casting mold to cure by standing at room temperature for 2-4 hours.

[0034] Optionally, in S3, when the tool forming groove is removed from the casting cavity, the green body that has completed gelation has not been dried, has low strength and is in a colloidal state. The casting cavity is side-opening, and the excess gel at the upper and lower through holes is removed by tangential force during the pulling process, forming a green body surface that meets the requirements for ceramic tool forming.

[0035] Optionally, in S4, the drying method includes: drying at room temperature for 12-24 hours, then drying at 35-45°C for 6-12 hours, and then drying at 45-50°C for 6-12 hours until the green body maintains a constant weight, so as to remove all the moisture from the green body.

[0036] Optionally, in S4, the sintering method includes: pressureless sintering in an air atmosphere, with a heating and cooling rate of 2~4℃ / min to prevent cracking during sintering due to excessively rapid temperature changes; holding at 400~600℃ for 1~3h during heating to remove cross-linked organic polymer networks, residual monomers, and initiators from the green body, avoiding the rapid decomposition of the organic phase during high-temperature sintering and the generation of a large amount of gas, which would lead to porosity in the green body; and holding at 1500~1900℃ for 2~8h to complete the forming process from ceramic powder to ceramic cutting tools. The specific sintering temperature and holding time need to be adjusted according to the material of the cutting tool matrix.

[0037] The present invention will be further described below with reference to specific embodiments.

[0038] Example 1 Ceramic cutting tool casting mold with chip-breaking groove, such as Figure 1 As shown, from top to bottom, it includes a main cascade casting pipe, and the lower branches of the main cascade casting pipe are connected to multiple module groups; each module group includes multiple cutter casting modules connected in series by the cascade casting pipe.

[0039] The main cascade pipeline includes a pouring main pipeline 2 and an exhaust main pipeline 4. The corresponding cascade pipeline also includes a pouring pipeline 10 and an exhaust pipeline 9. The pouring main pipeline 2 is connected to the pouring pipeline 10, and the exhaust main pipeline 4 is connected to the exhaust pipeline 9. The top end of the pouring main pipeline 2 is the pouring port 1, and the top end of the exhaust main pipeline 4 is the exhaust port 3.

[0040] like Figure 2 As shown, the top of the module group is connected to the overflow cavity 6, the overflow cavity is provided with an overflow vent 5, and the overflow cavity 6 is connected to the pouring main pipe 2 through the overflow pipe 35.

[0041] like Figure 1 As shown, the tool casting module includes a casting cavity 8 fixedly connected to the casting pipe. The casting cavity 8 is a side-opening cavity, and the side opening is used to install the tool forming groove 7. The upper and lower surfaces are respectively provided with cavity through holes that connect to the casting pipe, including cavity casting through holes and cavity venting through holes.

[0042] like Figure 3 As shown, the tool forming groove 7 is a groove with an opening at the top and a groove through hole at the bottom that connects to the casting pipe, including a groove casting through hole 32 and a groove venting through hole 31. After the tool forming groove 7 is installed into the casting cavity 8, the groove casting through hole 32, the cavity casting through hole and the casting pipe 10 are aligned vertically, and all three have a diameter of 5mm. The groove venting through hole 31, the cavity venting through hole and the venting pipe 9 are aligned vertically, and all three have a diameter of 2mm.

[0043] The bottom of the inner surface of the tool forming groove 7 is provided with a chip breaker forming surface 30 for forming the chip breaker groove of the ceramic tool blank. A pull-out component 29 is provided on the outer side of the groove for easy installation and removal. A through hole is located in the center of the bottom of the groove, and the chip breaker forming surface 30 is located around the through hole. The sidewall of the inner surface 34 of the groove includes a tool fillet forming surface 33 for forming the sidewall and fillet of the ceramic tool blank. The outline dimensions of the ceramic tool blank enclosed by the inner surface 34 of the groove are designed to be 16mm × 16mm × 6mm. The obtained ceramic tool blank is as follows: Figure 4 As shown, it is a cuboid with a thickness of 6mm. The chip breaking groove 38 of the ceramic tool blank is located on the lower surface. The radius of the tool fillet forming surface 33 is 0.8mm, which is the same as the fillet radius 39 of the ceramic tool blank. The size is 20% larger than the size of the sintered ceramic tool so that it can shrink to the standard ceramic tool size after sintering.

[0044] The side opening of the casting cavity 8 is used for the surface forming of the blank and facilitates the demolding of the tool blank: After the slurry gel is cured, when the tool forming groove 7 is taken out from the casting cavity 8, the gel at the upper and lower through holes is removed by the tangential force during the pulling process, and the blank surface that meets the forming requirements of ceramic tool is formed under the scraping action of the side opening.

[0045] Example 2 A method for casting ceramic cutting tools with chip breaker grooves based on the ceramic cutting tool casting mold of Embodiment 1 includes the following steps: S1. Install the tool forming groove 7 into the casting cavity 8, so that the groove casting through hole 32, the cavity casting through hole and the casting pipe 10 are aligned vertically, and the groove venting through hole 31, the cavity venting through hole and the venting pipe 9 are aligned vertically. S21. Weigh 15g of deionized water, 2g of methacrylamide, and 0.2g of methylenebisacrylamide into a beaker. Place a magnetic stirrer in the beaker and stir magnetically for 5 minutes to obtain a suspension. Add ammonia to the suspension to adjust the pH to 9. Add 1.5g of polyacrylamide dispersant to the suspension. Add alumina, zirconium oxide, and chromium oxide ceramic powders to the suspension to prepare a slurry with a solid content of 54 vol%, wherein the volume ratio of alumina to zirconium oxide is 8:2, and chromium oxide accounts for 0.4 vol%. The particle size of alumina powder is 500nm, the particle size of zirconium oxide powder is 800nm, and the particle size of chromium oxide powder is 1 vol%. μm, pour the prepared slurry into a ball mill jar and ball mill for 6 hours. After ball milling, add two drops of n-octanol defoamer and place it in a self-made vacuum stirring device for vacuum defoaming for 5 minutes. Prepare a 10wt% ammonium persulfate solution and a 10wt% tetramethylethylenediamine solution. Add 0.2g of ammonium persulfate solution and 0.2g of tetramethylethylenediamine solution to the defoamed slurry in sequence, and continue magnetic stirring for 10 minutes to obtain ceramic slurry.

[0046] S22. The ceramic slurry is injected into the ceramic tool casting mold with chip breaking groove through the pouring port 1. The gas is squeezed out from the exhaust pipe 9 by the downward flow of the slurry during injection. After the ceramic slurry fills the overflow cavity 6, it is placed in a drying oven at 40°C for gel curing for 2 hours.

[0047] S3. Remove each tool forming groove 7 from the pouring cavity 8, scrape the surface of the blank exposed from the tool forming groove 7 by the side opening, and perform ultrasonic cleaning on the casting mold to facilitate the next pouring; then demold the ceramic tool blank from the tool forming groove 7 to obtain the chip breaking groove ceramic tool blank.

[0048] S4. Dry the ceramic cutting tool green body with chip breaking groove at room temperature for 24 hours, then at 40℃ for 12 hours, and finally at 50℃ for 12 hours to remove all moisture from the green body and achieve constant weight. Place it in a pressureless sintering furnace and sinter it in an air atmosphere. The heating and cooling rates during sintering are 2℃ / min. Heat to 600℃ and hold for 1 hour to remove the binder. Then heat to 1600℃ and hold for 3 hours to obtain a ceramic cutting tool with chip breaking groove.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A ceramic tool casting mold with chip-breaking grooves, characterized in that, It includes multiple tool casting modules connected in series via a series casting pipe, wherein the series casting pipe includes a casting pipe and an exhaust pipe, and the tool casting module includes a casting cavity fixedly connected to the series casting pipe, wherein a tool forming groove is installed in the casting cavity; The casting cavity is a side-opening cavity, which is used to install the tool forming groove. The upper and lower surfaces are respectively provided with cavity through holes that connect to the casting pipe. The tool forming groove is a top-opening groove with a groove through hole at the bottom that connects to the casting pipe. The bottom of the inner surface of the groove is provided with a chip breaking groove forming surface.

2. The ceramic tool casting mold with chip-breaking groove as described in claim 1, characterized in that, The series of multiple cutting tool casting modules form a module group, and the casting pipes of the multiple module groups are connected in parallel at the upper end to the main casting pipe; the main casting pipe includes a casting main pipe and an exhaust main pipe; the casting main pipe connects to multiple casting pipes, and the exhaust main pipe connects to multiple exhaust pipes.

3. The ceramic tool casting mold with chip-breaking groove as described in claim 1, characterized in that, The tops of the multiple module groups are respectively connected to overflow cavities, the overflow cavities are provided with vents, and the overflow cavities are connected to the main pouring pipe.

4. The ceramic tool casting mold with chip breaking groove as described in claim 3, wherein a casting port is provided at the top end of the main casting pipe and an exhaust port is provided at the top end of the main exhaust pipe.

5. The ceramic tool casting mold with chip-breaking groove as described in claim 1, characterized in that, The cavity through hole and the trough through hole are respectively aligned with the cascade pipe; the cavity through hole and the trough through hole respectively include a grouting through hole and an exhaust through hole, so that the cascade pipe and the cavity through hole and the trough through hole form a vertically connected channel.

6. The ceramic tool casting mold with chip breaking groove as described in claim 1, characterized in that, The through hole of the groove is located in the center of the bottom of the groove, and the chip breaking groove forming surface is located around the through hole of the groove. Alternatively, the sidewall of the inner surface of the groove may include a rounded corner forming surface for the cutting tool.

7. A method for casting ceramic tools with chip breaker grooves based on a ceramic tool casting mold with chip breaker grooves as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Install the tool forming groove into the casting cavity; S2. Inject ceramic slurry into the casting cavity through the casting pipe and exhaust gas through the venting pipe; allow the ceramic slurry to solidify in the tool forming groove. S3. Remove the tool forming groove from the casting cavity, and remove the solidified ceramic tool blank from the tool forming groove; S4. Dry and sinter the green body to obtain a ceramic cutting tool with chip breaking grooves.

8. The method for casting ceramic cutting tools with chip breaker grooves as described in claim 7, characterized in that, In S1, align the through holes of the trough and the through holes of the cavity with the cascading pipes.

9. The method for casting ceramic cutting tools with chip breaker grooves as described in claim 7, characterized in that, In S2, the viscosity of the ceramic slurry is 0.1~1 Pa·s, and the pH is 7~12; Alternatively, in S2, the raw materials for preparing the ceramic slurry include ceramic powder, monomer, crosslinking agent, pH adjuster, dispersant, initiator, catalyst and water, wherein the mass ratio of ceramic powder, monomer and dispersant is 100:(2~6):(0.6~0.9), and the mass ratio of monomer and crosslinking agent is (5~15):1; Alternatively, in S2, the curing method includes: standing at room temperature for 2-4 hours.

10. The method for casting ceramic cutting tools with chip breaker grooves as described in claim 7, characterized in that, In S4, the drying method includes: drying at room temperature for 12-24 hours, then drying at 35-45℃ for 6-12 hours, and then drying at 45-50℃ for 6-12 hours until the green body maintains a constant weight; Alternatively, in S4, the sintering method includes: pressureless sintering in an air atmosphere, with a heating and cooling rate of 2~4℃ / min; holding at 400~600℃ for 1~3h during heating, and holding at 1500~1900℃ for 2~8h.

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