Ceramic mill integrating grinding, curing and sterilization and production process thereof

Abstract

The application belongs to the field of food processing, and discloses a ceramic grinding, curing and sterilizing integrated device and a production process. The technical scheme of the application comprises a fixed grinding disc and a movable grinding disc. The fixed grinding disc and the movable grinding disc are made of silicon carbide. The fixed grinding disc is internally provided with a fixed grinding disc annular groove. The fixed grinding disc annular groove is internally provided with a fixed grinding disc heating tungsten wire. The fixed grinding disc is provided with a fixed grinding disc heating tungsten wire connector. The fixed grinding disc heating tungsten wire connector is connected with the fixed grinding disc heating tungsten wire. The surface of the fixed grinding disc is provided with a fixed grinding disc groove. The device can combine the roasting and grinding of materials, reduce the process flow of food grinding, reduce the cost and process of pre-roasting, eliminate the waste of food, electricity and manpower and the oxidation occurring in the pre-roasting process, realize high-temperature enzyme inactivation and material antibacterial and bacteriostatic purposes in the roasting process, and enable the device to synchronously complete the four processes of grinding, curing, sterilization and enzyme inactivation at one time.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of food processing, and particularly relates to a ceramic mill for flouring, curing and sterilizing in an integrated manner and a production process. BACKGROUND

[0002] At present, in the processing of sesame paste type cereal powder products, the processing process is usually to first perform frying, then to perform flouring on the materials after the frying is completed, and then to perform sterilization on the material powder, which is complicated, easy to be disconnected, and after the frying is completed, the materials are ground, which is easy to cause a lot of waste in the process, and in the food grinding process, the materials are usually ground by using a grinding head, a stone mortar or a flour mill.

[0003] Conventional stone mills are gradually eliminated in modern industrialization due to the disadvantages of large weight, slow rotation speed and easy residue dropping in the grinding process.

[0004] At present, the grinding plates of commonly used food flour mills are mostly cast steel, hard alloy and stainless steel, the metal grinding plate is easy to chemically react with phytic acid and abscisic acid in the cereal, resulting in metal corrosion, in addition, after long-term use, the iron grinding plate is easy to wear, so that during use, the ground cereal powder carries a small amount of metal particles, which is not conducive to the quality of the cereal powder, in addition, the high-speed rotating iron grinding plate will cause iron filings to fall into the cereal powder during rotation, and the grinding plate groove is easy to breed bacteria during long-term use.

[0005] In order to improve the hardness of the grinding plate and reduce the residue dropping in the grinding process, researchers have developed and designed silicon carbide engineering ceramic grinding plates by referring to the sintering technology of precise machine tool ceramic cutters, however, ordinary silicon carbide engineering ceramics have many microcracks on the surface, which are easy to break when impacted at high speed, due to the high hardness and very sharpness of the silicon carbide engineering ceramics, the broken residues mixed in the flour will cause serious safety accidents when eaten by people.

[0006] In addition, due to the high hardness of the silicon carbide engineering ceramics, which is only next to the hardness of diamond, the sintered grinding plate still has the problems of difficulty in carving and high cost in the carving process, although some people use isostatic pressing to produce a blank, and then sinter after carving, however, due to the different stresses on the external parts of the blank during the subsequent sintering process, the blank is easy to crack, resulting in a large number of microcracks, which will break due to stress problems during use.

[0007] In addition, in Japan, researchers have developed a sintering process using a grinding wheel, which mixes silicon carbide particles with a ceramic binder for sintering, however, the density and toughness of the sintered grinding plate are not enough to support it as a grinding plate material, which is easy to break during rotation, and the thermal conductivity efficiency thereof is between 15-18 W·m-1·K-1, which is close to that of stainless steel. SUMMARY

[0008] In order to solve the above problems in the prior art, the present application aims to provide a flour milling, curing and sterilization integrated ceramic mill and production process to solve the problems of debris generated by mill wear, easy breeding of bacteria in mill grooves and enzymatic oxidation reaction during grinding.

[0009] The technical scheme adopted by the flour milling, curing and sterilization integrated ceramic mill and production process to solve the technical problems is as follows:

[0010] The flour milling, curing and sterilization integrated ceramic mill comprises a fixed mill and a moving mill, the fixed mill and the moving mill are made of silicon carbide, the fixed mill is internally provided with a fixed mill annular groove, the fixed mill annular groove is internally provided with a fixed mill heating tungsten wire, the fixed mill is provided with a fixed mill heating tungsten wire connector, the fixed mill heating tungsten wire connector is connected with the fixed mill heating tungsten wire, the surface of the fixed mill is provided with a fixed mill groove, the fixed mill surface is divided into a plurality of fixed mill teeth through the fixed mill groove, the fixed mill groove is in the shape of an inverted cone on the fixed mill, and the fixed mill is provided with a fixed mill opening in the middle.

[0011] The moving mill is located on one side of the fixed mill, the moving mill is internally provided with a moving mill annular groove, the moving mill annular groove is internally provided with a moving mill heating tungsten wire, the moving mill is provided with a moving mill heating tungsten wire connector, the moving mill heating tungsten wire connector is connected with the moving mill heating tungsten wire, the moving mill is provided with a moving mill groove, the surface of the moving mill is divided into a plurality of moving mill teeth through the moving mill groove, the moving mill groove is in the shape of an inverted cone on the surface of the moving mill, and the moving mill is provided with a mounting hole.

[0012] Further, the fixed mill teeth and the moving mill teeth are rectangular splines.

[0013] Further, the fixed mill teeth and the moving mill teeth are provided with trapezoidal chamfers.

[0014] Further, the fixed mill is fixedly provided with a fixed mill mounting plate on the outer periphery.

[0015] Further, the moving mill is fixedly provided with a moving mill mounting plate on the outer periphery.

[0016] Further, the fixed mill mounting plate and the moving mill mounting plate are respectively provided with through holes, and temperature sensors are fixedly installed in the through holes.

[0017] Further, the fixed mill and the moving mill are respectively provided with grooves corresponding to the through holes, and the inner walls of the grooves can be in contact with the contacts of the temperature sensors.

[0018] Further, the fixed mill annular groove and the moving mill annular groove are respectively provided with insulating powder, and the insulating powder is made of silicon nitride powder or aluminum nitride powder.

[0019] In another aspect, a production process for the above-mentioned any one of the flour milling, curing and sterilization integrated ceramic mill is also provided, comprising:

[0020] First step: using isostatic pressing to make the green body of the fixed grinding disc and the movable grinding disc, and the cover plate green body required for sealing the bottom of the fixed grinding disc and the movable grinding disc, the material of the green body is silicon carbide, and 1.8-3% of sintering aid is uniformly doped in the silicon carbide, wherein the sintering aid is alumina and yttrium oxide powder with a diameter of 0.3-0.5 μm;

[0021] Second step: using a three-dimensional carving machine to carve the shapes of the fixed grinding disc groove, the fixed grinding disc annular groove and the movable grinding disc groove, and the movable grinding disc annular groove on the corresponding fixed grinding disc and movable grinding disc green bodies respectively, and reserving a shrinkage of 17-20%;

[0022] Third step: taking out two sets of molds corresponding to the fixed grinding disc and the movable grinding disc, the mold comprising an upper mold and a lower mold, the material of the upper mold and the lower mold is graphite that can withstand 2100° high temperature, the middle part of the bottom surface of the upper mold is provided with an upper mold centering cone surface, and the middle part of the bottom surface of the lower mold is provided with a lower mold centering cone surface;

[0023] Fourth step: laying carbon paper in the upper mold and the lower mold, the thickness of the carbon paper is between 0.5-0.7 mm;

[0024] Fifth step: placing the carved green bodies in the corresponding molds respectively;

[0025] Sixth step: placing the mold in the sintering furnace, pressurizing, oscillating and heating at the same time, the sintering temperature is between 1900-2050°, and the dense fixed grinding disc and the dense movable grinding disc can be obtained;

[0026] Seventh step: filling a layer of insulating powder into the fixed grinding disc annular groove and the movable grinding disc annular groove respectively, placing the fixed grinding disc heating tungsten wire into the fixed grinding disc annular groove, placing the movable grinding disc heating tungsten wire into the movable grinding disc annular groove, and then filling a layer of insulating powder into the fixed grinding disc annular groove and the movable grinding disc annular groove respectively, so that the insulating powder wraps the corresponding fixed grinding disc heating tungsten wire and the movable grinding disc heating tungsten wire and fills the fixed grinding disc annular groove and the movable grinding disc annular groove, respectively using the cover plate to buckle the corresponding fixed grinding disc and movable grinding disc, completing the sealing of the fixed grinding disc annular groove and the movable grinding disc annular groove, and performing secondary sintering in a high temperature and high pressure environment to complete the bonding between the cover plate and the corresponding fixed grinding disc and movable grinding disc, and through the process effect of vacuum thermal diffusion welding, the atomic level combination of the fixed grinding disc and the movable grinding disc with the insulating powder is completed.

[0027] The eighth step is to take out the corresponding fixed grinding disc and movable grinding disc from the corresponding mold, and inlay the fixed grinding disc and movable grinding disc in the corresponding fixed grinding disc mounting plate and movable grinding disc mounting plate respectively, specifically, the inlaying mode is: the corresponding fixed grinding disc shell and movable grinding disc shell are heated to 180-250 DEG, and the upper grinding disc shell and lower grinding disc shell are expanded by heating, the fixed grinding disc and movable grinding disc are pneumatically pressed into the corresponding fixed grinding disc shell and movable grinding disc shell, and after cooling, the fixed grinding disc and movable grinding disc have a shrinkage allowance of 30-50 silk with the corresponding fixed grinding disc shell and movable grinding disc shell.

[0028] Further, after the fourth step is completed, the carbon paper is sprayed with a PET or PE high molecular organic solution.

[0029] Compared with the prior art, the beneficial effects of the present application are:

[0030] 1、The ceramic mill for grinding, curing and sterilizing in one process disclosed by the application has the fixed grinding disc fixed on the outer shell, the movable grinding disc installed on the rotatable working shaft through the mounting hole, the fixed grinding disc groove on the fixed grinding disc opposite to the movable grinding disc groove on the movable grinding disc, and the material fed from the fixed grinding disc opening through direct feeding or screw feeding during use, so that the material on the movable grinding disc rotating surface is subjected to strong shearing, friction, impact and high-frequency oscillation during the high-speed movement of the movable grinding disc, so that the material is crushed, dispersed, ground and refined, and the gap between the fixed grinding disc and the movable grinding disc is controlled to control the particle size and coarseness of the ground powder, and the fixed grinding disc heating tungsten wire and the movable grinding disc heating tungsten wire heat the fixed grinding disc and the movable grinding disc respectively to roast the material during the grinding process, perform high-temperature enzyme inactivation treatment under high temperature to reduce the generation of enzyme oxidation reaction, and the radiant heat energy generated by the heated silicon carbide material can achieve air conduction heating sterilization effect, so that the roasting and grinding of the material can be combined through the device to reduce the process flow of food grinding, reduce the cost and process of pre-roasting, eliminate the waste of food, electricity and labor and the oxidation generated in the pre-roasting process, realize high-temperature enzyme inactivation and material antibacterial and bacteriostatic purposes during the roasting process, and the device can complete the four processes of grinding, curing, sterilization and enzyme inactivation at one time.

[0031] 2、The ceramic mill for grinding, curing and sterilizing in one process disclosed by the application can improve the grinding effect and form high-density, pore-free and sharp grinding particles through the rectangular rack-shaped fixed grinding disc teeth and movable grinding disc teeth during grinding.

[0032] 3、The ceramic mill for grinding, curing and sterilizing in one process disclosed by the application can form fine and smooth paste-like particles during grinding through the trapezoidal chamfer.

[0033] 4. The integrated grinding, curing, and sterilization ceramic mill of the present invention can protect the outer periphery of the fixed grinding disc through the fixed grinding disc mounting plate.

[0034] 5. The integrated grinding, curing, and sterilization ceramic mill of the present invention can protect the moving grinding disc through the moving grinding disc mounting plate.

[0035] 6. The integrated grinding, curing, and sterilization ceramic mill of the present invention can detect the temperature of the fixed grinding disc and the moving grinding disc through a temperature sensor, and can conveniently adjust the temperature of the fixed grinding disc and the moving grinding disc.

[0036] 7. The integrated ceramic mill for grinding, curing, and sterilization in this invention improves the contact area of ​​the temperature sensor by cooperating with the inner wall of the groove and the temperature sensor contact, thus making the temperature sensor detect temperature more accurately.

[0037] 8. In the integrated grinding, curing, and sterilization ceramic mill of the present invention, since the fixed grinding disc and the moving grinding disc are preferably made of silicon carbide, and silicon carbide is a semiconductor material, the annular grooves of the fixed grinding disc and the moving grinding disc are filled with insulating powder to prevent leakage. Nitride fillers have the characteristics of high thermal conductivity, good electrical insulation performance, excellent high temperature resistance and excellent dielectric properties. Therefore, using silicon nitride powder and aluminum nitride powder as insulating powder can quickly transfer heat while preventing leakage.

[0038] 9. The production process of the integrated grinding, curing, and sterilization ceramic mill of this invention involves first carving the unfinished blank and then sintering the fixed and moving grinding discs produced by this process. This reduces the difficulty of subsequent processing. Furthermore, by heating, vibrating, and sintering simultaneously, the produced fixed and moving grinding discs become more dense, preventing the formation of micro-cracks during production. The theoretical density can reach 3.18 grams per cubic centimeter, while its fracture toughness can exceed 6 MPa. 1 / 2 Compared to the current common 4 MPa m 1 / 2 The silicon carbide ceramic material used in the production process has been significantly improved, making the produced grinding discs less prone to breakage. Furthermore, the thermal conductivity of the produced grinding discs reaches 140 W / m·K, eight times that of stainless steel, accelerating heat exchange efficiency and enabling instantaneous heating and curing of powders. By adding sintering aids, densification during sintering is promoted. Allowing for 17-20% shrinkage before sintering ensures that the blank reaches the standard volume after shrinkage during pressure sintering. The addition of insulating powder and heating tungsten wire, followed by a secondary sintering process with a cover plate, facilitates the forming of both fixed and moving grinding discs. The use of carbon paper prevents the blank from sintering with the mold during sintering, making it easier to remove the sintered grinding disc after completion.

[0039] 10. The production process of the integrated grinding, curing and sterilization ceramic mill of the present invention, by spraying PET polymer organic solution on carbon paper, can repair the cracks that appear on the carbon paper during sintering, and can better separate the mold and the green blank. Attached Figure Description

[0040] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0041] Figure 1 This is a schematic diagram of the fixed grinding disc assembly of the present invention;

[0042] Figure 2 This is a front view of the fixed grinding disc;

[0043] Figure 3 This is a top view of the fixed grinding disc;

[0044] Figure 4 It is a cross-sectional view of the stationary grinding disc along the surface where the heating tungsten wires are arranged;

[0045] Figure 5 This is a schematic diagram of the moving grinding disc assembly of the present invention;

[0046] Figure 6 This is a front view of the moving millstone;

[0047] Figure 7 This is a top view of the moving millstone;

[0048] Figure 8 It is a cross-sectional view of the moving grinding disc along the surface where the heating tungsten wires are arranged;

[0049] Figure 9 This is a downward-sloping view of the mold;

[0050] Figure 10 This is an upward angled view of the mold;

[0051] Figure 11 This is a schematic diagram of the upper mold structure;

[0052] Figure 12 This is a schematic diagram of the lower mold structure.

[0053] In the diagram: 101, Upper mold; 102, Centering cone surface of the upper mold; 110, Fixed grinding disc; 111, Fixed grinding disc groove; 112, Fixed grinding disc teeth; 115, Fixed grinding disc annular groove; 118, Fixed grinding disc heating tungsten wire; 119, Fixed grinding disc heating tungsten wire connector; 130, Fixed grinding disc mounting plate; 141, Through hole; 142, Groove; 150, Temperature sensor; 201, Lower mold; 202, Centering cone surface of the lower mold; 210, Moving grinding disc; 211, Moving grinding disc groove; 212, Moving grinding disc teeth; 215, Moving grinding disc annular groove; 216, Insulating powder; 218, Moving grinding disc heating tungsten wire; 219, Moving grinding disc heating tungsten wire connector; 230, Moving grinding disc mounting plate. Detailed Implementation

[0054] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment provides an integrated ceramic mill for grinding, curing, and sterilization, including a fixed grinding disc 110 and a movable grinding disc 210. The fixed grinding disc 110 and the movable grinding disc 210 are made of silicon carbide. The fixed grinding disc 110 has an annular groove 115 inside, and a fixed grinding disc heating tungsten wire 118 is provided in the annular groove 115. The fixed grinding disc 110 has a fixed grinding disc heating tungsten wire connector 119, which is connected to the fixed grinding disc heating tungsten wire 118. A grinding disc groove 111 is opened on the surface of the fixed grinding disc 110, which divides the surface of the fixed grinding disc 110 into several grinding disc teeth 112. The grinding disc groove 111 is in the shape of an inverted cone on the fixed grinding disc 110. A grinding disc opening is provided in the middle of the fixed grinding disc 110, which facilitates feeding during grinding.

[0057] like Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, the moving grinding disc 210 is located on one side of the fixed grinding disc 110. The moving grinding disc 210 has an annular groove 215 inside, and a tungsten heating wire 218 is installed in the annular groove 215. The moving grinding disc 210 has a tungsten heating wire connector 219 connected to the tungsten heating wire 218. The moving grinding disc 210 has a groove 211, which divides the surface of the moving grinding disc 210 into several moving grinding disc teeth 212. The groove 211 is in the shape of an inverted cone on the surface of the moving grinding disc 210. The moving grinding disc 210 has a mounting hole, which allows the moving grinding disc to be easily installed on the working shaft.

[0058] In this embodiment, the fixed grinding disc teeth 112 and the moving grinding disc teeth 212 are rectangular racks.

[0059] In this embodiment, trapezoidal chamfers are provided on both the fixed grinding disc teeth 112 and the moving grinding disc teeth 212.

[0060] In this embodiment, a fixed grinding disc mounting plate 130 is fixedly installed on the outer periphery of the fixed grinding disc 110. Specifically, the fixed grinding disc mounting plate 130 is made of stainless steel.

[0061] In this embodiment, a moving grinding disc mounting plate 230 is fixedly installed on the outer periphery of the moving grinding disc 210. Specifically, the moving grinding disc mounting plate 230 is made of stainless steel.

[0062] In this embodiment, through holes 141 are respectively opened on the fixed grinding disc mounting plate 130 and the moving grinding disc mounting plate 230, and temperature sensors 150 are respectively fixedly installed in the through holes 141.

[0063] In this embodiment, grooves 142 are respectively provided on the fixed grinding disc 110 and the moving grinding disc 210 corresponding to the through hole 141, and the inner wall of the groove 142 can contact and cooperate with the contact of the temperature sensor 150.

[0064] In this embodiment, insulating powder 216 is provided in the annular groove 115 of the fixed grinding disc and the annular groove 215 of the moving grinding disc, respectively. The insulating powder 216 is made of silicon nitride powder or aluminum nitride powder, preferably silicon nitride powder.

[0065] In this embodiment, a production process for any of the above-mentioned integrated grinding, aging, and sterilization ceramic mills is also provided, including:

[0066] Step 1: The blanks of the fixed grinding disc 110 and the moving grinding disc 210, as well as the blanks of the cover plates required for sealing the bottom of the fixed grinding disc 110 and the moving grinding disc 210, are made by isostatic pressing. The blanks are made of silicon carbide, and sintering aids with a content of 1.8-3% are uniformly doped in the silicon carbide. The sintering aids are alumina and yttrium oxide micro powder with a diameter of 0.3-0.5μm.

[0067] Step 2: Using a 3D engraving machine, carve the shapes of the corresponding fixed grinding disc groove 111, fixed grinding disc annular groove 115, and moving grinding disc groove 211 and moving grinding disc annular groove 215 on the corresponding fixed grinding disc 110 and moving grinding disc 210 blanks respectively, and reserve a shrinkage amount between 17-20%.

[0068] Step 3: Take out two sets of molds that correspond to the fixed grinding disc 110 and the moving grinding disc 210 respectively. The molds include an upper mold 101 and a lower mold 201. The upper mold 101 and the lower mold 201 are made of graphite that can withstand a high temperature of 2100°. The upper mold 101 has an upper mold centering cone surface 102 in the middle of its bottom surface, and the lower mold 201 has a lower mold centering cone surface 202 in the middle of its bottom surface.

[0069] Step 4: Place carbon paper inside the upper mold 101 and the lower mold 201. The thickness of the carbon paper should be between 0.5-0.7mm.

[0070] Step 5: Place the carved blanks into their respective molds;

[0071] Step 6: Clamp the mold in the sintering furnace, apply pressure, vibrate and heat at the same time, and the sintering temperature is between 1900-2050° to obtain a dense fixed grinding disc 110 and a moving grinding disc 210.

[0072] Step 7: Fill the annular groove 115 of the fixed grinding disc and the annular groove 215 of the moving grinding disc with a layer of insulating powder 216. Place the heating tungsten wire 118 of the fixed grinding disc into the annular groove 115 of the fixed grinding disc and the heating tungsten wire 218 of the moving grinding disc into the annular groove 215 of the moving grinding disc. Then fill the annular groove 115 of the fixed grinding disc and the annular groove 215 of the moving grinding disc with a layer of insulating powder 216, so that the insulating powder 216 respectively wraps and protects the corresponding heating tungsten wires 118 of the fixed grinding disc and the tungsten wires 218 of the moving grinding disc. The annular groove 115 of the fixed grinding disc and the annular groove 215 of the moving grinding disc are filled. Cover plates are then fastened to the corresponding fixed grinding discs 110 and 210 to seal the bottom of the annular grooves 115 and 215. Secondary sintering is then performed under high temperature and high pressure to bond the cover plates to the corresponding fixed grinding discs 110 and 210. At the same time, the atomic-level bonding between the fixed grinding discs 110 and 210 and the insulating powder 216 is achieved through the vacuum thermal diffusion welding process.

[0073] Step 8: Remove the corresponding fixed grinding disc 110 and moving grinding disc 210 from the corresponding molds. Embed the fixed grinding disc 110 and moving grinding disc 210 into the corresponding fixed grinding disc mounting plate 130 and moving grinding disc mounting plate 230, respectively. Specifically, the embedding method is as follows: After heating the corresponding fixed grinding disc shell 150 and moving grinding disc shell 250 to 180-250°, the upper grinding disc shell 150 and lower grinding disc shell 250 expand due to heat, and the fixed grinding disc 110 and moving grinding disc 210 are pneumatically pressed into the corresponding fixed grinding disc shell 150 and moving grinding disc shell 250. After cooling, the fixed grinding disc 110 and moving grinding disc 210 have a shrinkage allowance of 30-50 microns with the corresponding fixed grinding disc shell 150 and moving grinding disc shell 250, respectively.

[0074] In this embodiment, after completing the fourth step, a PET or PE polymer organic solution is sprayed onto the carbon paper.

[0075] In this device, silicon carbide is currently the world's fastest thermally conductive bio-inert material, with a thermal conductivity eight times that of stainless steel. Utilizing its bio-inert properties, silicon carbide does not chemically react with food, making it safer. Furthermore, silicon carbide is a natural low-temperature infrared material with inherent infrared properties, possessing antibacterial and bacteriostatic effects, enhancing food flavor, and improving its antioxidant properties. Compared to metals, it is more inert and will not react with phytic acid or abscisic acid in food, preventing corrosion of the grinding disc itself. During production, an isostatic pressing method is used to create the blank, which is then carved and placed into a mold. The upper mold 101 and lower mold 201 are aligned via the conical surface of the upper mold. The 102 and lower mold centering cone 202 automatically align during engagement. The mold is then clamped in a sintering furnace for firing. During firing, sintering is performed at a high temperature of 1900-2050 degrees Celsius while simultaneously undergoing high-frequency vibration and frontal pressure. Specifically, the high-frequency vibration employs a vibration mixing process, using mechanical oscillation and mixing at 3000 times per minute, replacing traditional ball mill mixing. This allows for nanoparticle diffusion during oscillating hot-pressing sintering. 3-5% silicon carbide whiskers are mixed with 95% silicon carbide granulated powder using high-frequency oscillation and mixing, ensuring uniform distribution of the silicon carbide whiskers within the granulated powder. After sintering, the silicon carbide whiskers act as bridging elements in the microstructure, much like countless small steel bars in concrete, through carbonization... Silicon whiskers are used to toughen the sintered product, making it denser. By allowing for a shrinkage allowance of 17-20%, the standard-sized grinding disc is obtained after the shrinkage of the green blank during the sintering process. After sintering, the grinding disc undergoes minor machining. A layer of insulating powder 216 is then filled into the annular groove 115 of the fixed grinding disc and the annular groove 215 of the moving grinding disc. The heating tungsten wire 118 of the fixed grinding disc is placed into the annular groove 115, and the heating tungsten wire 218 of the moving grinding disc is placed into the annular groove 215. Another layer of insulating powder 216 is then filled into the annular grooves 115 and 215 of the moving grinding disc. The cover plates corresponding to the green blank are then fastened to seal the bottom of the fixed grinding disc 110 and the moving grinding disc 210. A second sintering process completes the connection between the cover plates and the corresponding fixed grinding discs. The bonding between the stationary grinding disc 110 and the moving grinding disc 210 is achieved through vacuum thermal diffusion welding, resulting in an atomic-level bond between the stationary grinding disc 110, the moving grinding disc 210, and the insulating powder 216. During the firing process, carbon paper with a thickness of 0.5-0.7 mm is placed between the mold and the ceramic grinding disc, and PET or PE polymer organic solvent is sprayed onto the carbon paper. The carbon paper separates the mold and the grinding disc during sintering, and when cracks occur in the carbon paper during sintering, the PET or PE polymer organic solvent can repair the cracks, effectively separating the mold and the grinding disc. The grinding disc produced using this method has a theoretical density of 3.18 g / cm³ and a fracture toughness exceeding 6 MPa.1 / 2 Compared to the current common 4 MPa m 1 / 2The silicon carbide ceramic material used in the production process has been significantly improved, making the produced grinding discs less prone to breakage. Furthermore, the thermal conductivity of the produced grinding discs reaches 140 W / m·K, eight times that of stainless steel. The fixed grinding disc 110 is fixed to the outer casing via a fixed grinding disc mounting plate 130, while the movable grinding disc 210 is mounted on a rotatable working shaft through mounting holes. The fixed grinding disc groove 111 on the fixed grinding disc 110 corresponds to the movable grinding disc groove 211 on the movable grinding disc 210. During use, materials can be fed directly or via a screw conveyor from the opening of the fixed grinding disc. When the movable grinding disc 210 moves at high speed, a velocity gradient is generated on the rotating surface of the movable grinding disc 210. This gradient is achieved through the rectangular rack-shaped teeth 112 of the fixed grinding disc and the teeth 212 of the movable grinding disc. The trapezoidal chamfers on the fixed grinding disc teeth 112 and the moving grinding disc teeth 212 subject the material to intense shearing, friction, impact, and high-frequency oscillation, resulting in crushing, dispersion, grinding, and refinement. Furthermore, by controlling the gap between the fixed grinding disc 110 and the moving grinding disc 210, the particle size and fineness of the output powder can be controlled. Simultaneously, during this process, the heating tungsten wire 118 of the fixed grinding disc heats the fixed grinding disc 110 without leakage through heat conduction from the insulating powder 216, and the heating tungsten wire 218 of the moving grinding disc heats the moving grinding disc 210 without leakage through heat conduction from the insulating powder 216. The temperature of the fixed grinding disc 110 and the moving grinding disc 210 is monitored by a temperature sensor 150, facilitating the control of the heating tungsten wire 118 of the fixed grinding disc and the moving grinding disc. The heating temperature of the tungsten filament 218 is regulated. Utilizing the superconductivity between the semiconductor material silicon carbide and the insulating materials silicon nitride or aluminum nitride, rapid heating is achieved without leakage, reducing heat loss during the heating process and thus saving energy. This device allows for the roasting of materials during grinding, and simultaneously performs high-temperature enzyme inactivation, reducing enzymatic oxidation. Furthermore, the radiant heat generated by heating the silicon carbide material provides air conduction heating and sterilization. This device combines roasting and grinding of materials using the inherently high thermal conductivity of silicon carbide, achieving instant heating and cooking during grinding, reducing the burden on food grinding processes. The process reduces the cost and steps of pre-frying, minimizes waste, and reduces the opportunity and reaction time for food deterioration. This device eliminates waste of ingredients, electricity, and manpower, as well as oxidation that occurs during pre-frying. It achieves high-temperature enzyme inactivation and antibacterial properties during frying, enabling the device to simultaneously complete the four processes of grinding, cooking, sterilization, and enzyme inactivation. From a consumer perspective, this device saves time and effort; simply put the grains into the device to obtain the finished product, making it more attractive to buyers and users. For health-conscious consumers, this device reduces food oxidation and spoilage, resulting in healthier powder while also minimizing waste during processing.

[0076] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0077] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this invention, the other technical features will not be described in detail here.

Claims

1. A ceramic mill integrating grinding, curing, and sterilization, comprising a fixed grinding disc (110) and a movable grinding disc (210), characterized in that, The fixed grinding disc (110) and the moving grinding disc (210) are made of silicon carbide. The fixed grinding disc (110) has an annular groove (115) inside, and a tungsten heating wire (118) is provided in the annular groove (115). A tungsten heating wire connector (119) is provided on the fixed grinding disc (110). The tungsten heating wire connector (119) is connected to the tungsten heating wire (118). A grinding disc groove (111) is opened on the surface of the fixed grinding disc (110). The surface of the fixed grinding disc (110) is divided into several grinding disc teeth (112) through the grinding disc groove (111). The grinding disc groove (111) is in the shape of an inverted cone on the fixed grinding disc (110). A grinding disc opening is provided in the middle of the fixed grinding disc (110). The moving grinding disc (210) is located on one side of the fixed grinding disc (110). The moving grinding disc (210) has an annular groove (215) inside. The annular groove (215) has a tungsten heating wire (218) inside. The moving grinding disc (210) has a tungsten heating wire connector (219) on it. The tungsten heating wire connector (219) is connected to the tungsten heating wire (218). The moving grinding disc (210) has a groove (211) on it. The surface of the moving grinding disc (210) is divided into several teeth (212) through the groove (211). The groove (211) is in the shape of an inverted cone on the surface of the moving grinding disc (210). The moving grinding disc (210) has mounting holes. The fixed grinding disc annular groove (115) and the moving grinding disc annular groove (215) are respectively provided with insulating powder (216), and the insulating powder (216) is made of silicon nitride powder or aluminum nitride powder.

2. The integrated ceramic mill for grinding, ripening, and sterilization according to claim 1, characterized in that, The fixed grinding disc teeth (112) and the moving grinding disc teeth (212) are rectangular racks.

3. The integrated ceramic mill for grinding, ripening, and sterilization according to claim 1, characterized in that, Both the fixed grinding disc teeth (112) and the moving grinding disc teeth (212) have trapezoidal chamfers.

4. The integrated ceramic mill for grinding, ripening, and sterilization according to claim 1, characterized in that, The fixed grinding disc mounting plate (130) is fixedly installed on the outer periphery of the fixed grinding disc (110).

5. The integrated ceramic mill for grinding, ripening, and sterilization according to claim 4, characterized in that, The moving grinding disc (210) is fixedly mounted on the outer periphery of the moving grinding disc (230).

6. The integrated ceramic mill for grinding, ripening, and sterilization according to claim 5, characterized in that, Through holes (141) are respectively opened on the fixed grinding disc mounting plate (130) and the moving grinding disc mounting plate (230), and temperature sensors (150) are respectively fixedly installed in the through holes (141).

7. The integrated ceramic mill for grinding, ripening, and sterilization according to claim 6, characterized in that, The fixed grinding disc (110) and the moving grinding disc (210) respectively have grooves (142) corresponding to the through holes (141), and the inner wall of the groove (142) can contact and cooperate with the contacts of the temperature sensor (150).

8. The production process of the integrated grinding, aging, and sterilization ceramic mill according to any one of claims 1-7, characterized in that, Step 1: The blanks of the fixed grinding disc (110) and the moving grinding disc (210) are made by isostatic pressing, as well as the blanks of the cover plates required for sealing the bottom of the fixed grinding disc (110) and the moving grinding disc (210). The blanks are made of silicon carbide, and sintering aids with a volume fraction of 1.8-3% are uniformly doped in the silicon carbide. The sintering aids are alumina and yttrium oxide micro powder with a diameter of 0.3-0.5μm. Step 2: Using a 3D engraving machine, carve the corresponding fixed grinding disc groove (111), fixed grinding disc annular groove (115) and moving grinding disc groove (211), and moving grinding disc annular groove (215) shapes on the corresponding fixed grinding disc (110) and moving grinding disc (210) blanks respectively, and reserve a shrinkage amount between 17-20%; Step 3: Take out two sets of molds corresponding to the fixed grinding disc (110) and the moving grinding disc (210) respectively. The molds include an upper mold (101) and a lower mold (201). The upper mold (101) and the lower mold (201) are made of graphite that can withstand high temperatures of 2100°. The upper mold (101) has an upper mold centering cone surface (102) in the middle of its bottom surface, and the lower mold (201) has a lower mold centering cone surface (202) in the middle of its bottom surface. Step 4: Place carbon paper inside the upper mold (101) and lower mold (201), with the thickness of the carbon paper between 0.5-0.7mm; Step 5: Place the carved blanks into their respective molds; Step 6: Clamp the mold in the sintering furnace, apply pressure, vibrate and heat at the same time, and the sintering temperature is between 1900-2050° to obtain a dense fixed grinding disc (110) and a moving grinding disc (210). Step 7: Fill the annular groove (115) of the fixed grinding disc and the annular groove (215) of the moving grinding disc with a layer of insulating powder (216). Place the heating tungsten wire (118) of the fixed grinding disc into the annular groove (115) of the fixed grinding disc and the heating tungsten wire (218) of the moving grinding disc into the annular groove (215) of the moving grinding disc. Then fill the annular groove (115) of the fixed grinding disc and the annular groove (215) of the moving grinding disc with a layer of insulating powder (216) respectively, so that the insulating powder (216) wraps the corresponding heating tungsten wire (118) of the fixed grinding disc and the heating tungsten wire (218) of the moving grinding disc respectively. The annular groove (115) of the fixed grinding disc and the annular groove (215) of the moving grinding disc are filled. The cover plates are fastened to the corresponding fixed grinding disc (110) and the moving grinding disc (210) to seal the bottom of the annular groove (115) of the fixed grinding disc and the annular groove (215) of the moving grinding disc. Secondary sintering is carried out under high temperature and high pressure to bond the cover plates to the corresponding fixed grinding disc (110) and the moving grinding disc (210). At the same time, through the process effect of vacuum thermal diffusion welding, the atomic-level bonding between the fixed grinding disc (110) and the moving grinding disc (210) and the insulating powder (216) is completed. Step 8: Take out the corresponding fixed grinding disc (110) and moving grinding disc (210) from the corresponding molds, and embed the fixed grinding disc (110) and moving grinding disc (210) into the corresponding fixed grinding disc mounting plate (130) and moving grinding disc mounting plate (230) respectively. Specifically, the embedding method is as follows: after heating the corresponding fixed grinding disc shell (150) and moving grinding disc shell (250) to 180-250°, the upper grinding disc shell (150) and lower grinding disc shell (250) expand due to heat, and the fixed grinding disc (110) and moving grinding disc (210) are pneumatically pressed into the corresponding fixed grinding disc shell (150) and moving grinding disc shell (250). After cooling, the fixed grinding disc (110) and moving grinding disc (210) have a shrinkage allowance of 30-50 mils with the corresponding fixed grinding disc shell (150) and moving grinding disc shell (250) respectively.

9. The production process of the integrated grinding, aging, and sterilization ceramic mill according to claim 8, characterized in that, After completing the fourth step, a PET or PE polymer organic solution is sprayed onto the carbon paper.

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