Manufacturing method of cookware with function of releasing far infrared rays by heating

Abstract

The invention discloses a method for manufacturing cookware with a function of releasing far infrared rays by heating, and relates to the field of marmite manufacturing, which comprises the following steps: S1, preparing pug: preparing argil, kaolin, quartz and pre-sintered argil particles, and mixing the raw materials in proportion, S2, adding carbon powder: preparing carbon powder, and carrying out granularity sorting on the carbon powder by using a screen, the ceramic pug is pumped into a spray drying tower, slurry liquid drops are dried through hot air, S4, trimming and firing are conducted, specifically, the earthen pot prototype is dried, bound water contained in the earthen pot prototype is removed, trimming and glaze spraying are conducted on the surface of the earthen pot, and finally the earthen pot prototype is sent into a kiln to be subjected to vacuum firing; according to the device, the carbon powder is added on the basis of a traditional argil raw material, the carbon powder can serve as a conducting medium, the pot body can generate induction current to generate heat, the device can be directly applied to an induction cooker, far infrared rays can be released after heating, and the more uniform and faster heating effect is achieved.

Description

Technical Field

[0001] This invention relates to the technology of making casserole dishes, specifically to a method for making a cookware with the function of releasing far-infrared rays when heated. Background Technology

[0002] A clay pot is a traditional cooking utensil made of earthenware or porcelain. It is known for its excellent heat retention and high-temperature resistance. It allows food to be heated evenly and is especially suitable for slow simmering, which better preserves the original flavor and nutrients of the ingredients.

[0003] Since induction cookers heat food by generating eddy currents through electromagnetic induction, the cookware must be magnetic. Traditional earthenware pots are made of clay or ceramic and do not have magnetic properties, so they cannot generate heat. If you want to use them on an induction cooker, you need to put a heat-conducting plate in them to use them indirectly, which makes them less convenient to use. Summary of the Invention

[0004] The purpose of this invention is to provide a method for manufacturing a cookware with the function of releasing far-infrared rays when heated, so as to solve the problem that traditional earthenware pots are made of clay or ceramic, which do not have magnetic properties and cannot generate heat. If they are to be used on an induction cooker, they need to be placed on a heat-conducting plate for indirect use, which makes them inconvenient to use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for manufacturing a cookware with a heating and far-infrared emission function, comprising the following steps:

[0006] S1 Clay Preparation: Prepare clay, kaolin, quartz and pre-fired clay particles. Mix these raw materials in proportion, add water and mix again to form clay slurry. Use ball milling technology to grind the clay slurry. Finally, use a sieve to filter out impurities from the ground clay slurry to obtain the body slurry.

[0007] S2 Carbon Addition: Prepare carbon powder and sort the carbon powder by particle size using a sieve. Use a dry mixing method to uniformly dry mix the carbon powder raw material with the body raw material. Then add water for wet mixing and vacuum mud refining operation to finally obtain ceramic clay. During dry mixing, first convert the mud slurry into a carrier, that is, dehydrate the mud slurry or use mud powder to make it into dry or semi-dry particles. In the dry state, use mechanical force to embed and adhere the carbon powder particles to the surface of the clay particles.

[0008] S3 Die Casting Molding: Ceramic clay is pumped into a spray drying tower, where hot air dries the slurry droplets and forms hollow spherical particles to obtain granulated powder. An automatic feeder then precisely fills the mold cavity with the granulated powder, and a pressure device is activated to die-cast it. Finally, the mold is demolded to obtain the prototype of the casserole. Spray drying atomizes the uniformly mixed clay into tiny droplets, which are then instantly dried in high-temperature hot air. Each droplet contains tiny units of all the components, ensuring that the chemical composition and carbon powder content of each dried spherical particle are completely consistent with the overall formula, thus avoiding uneven composition and ensuring the consistent performance of the carbon powder casserole.

[0009] S4 Finishing and Firing: The original clay pot is dried to remove the bound water inside, and the surface of the clay pot is trimmed and glazed. Finally, it is sent into the kiln for vacuum firing.

[0010] Furthermore, in step S1, during the mud preparation operation, the content of clay is 30%-40%, the content of kaolin is 20%-30%, the content of quartz is 15%-25%, and the content of pre-fired clay particles is 15%-30%.

[0011] Furthermore, in step S1, the sieve used in the mud preparation operation is a 100-mesh sieve.

[0012] Further, in step S2, the carbon powder added accounts for 7%-15% of the total carbon powder content. This range ensures the heat conduction of the pot while preventing the pot from becoming brittle and its thermal shock resistance from decreasing due to excessive carbon powder content. The carbon powder used has a fineness of 300-400 mesh. The dry mixing time between the carbon powder raw material and the raw material is 15-20 minutes. After dehydrating the slurry to obtain mud particles, the semi-dry mud blocks are broken by hand or tools and then passed through a 40-60 mesh sieve to make uniform moist mud particles, thereby increasing the contact surface area with the carbon powder and making the mixing more uniform. The sieved mud particles are spread evenly on the workbench, and the sieved carbon powder is sprinkled evenly on the surface of the mud particles in multiple applications. After each layer is sprinkled, it is stirred from the bottom up with a shovel or by hand, similar to kneading dough, to ensure that the carbon powder covers all the mud particles, so that the carbon powder physically coats the surface of each moist mud particle, forming a sandwich structure. The mixed material is then a uniform gray-black color.

[0013] Further, in step S2, during the carbon powder addition operation, the hard mud cake after pressure filtration and dewatering is first crushed and fed into the feeding port of the vacuum mud mixer. The mud is conveyed forward and initially kneaded by the screw shaft, and then pushed into a sealed vacuum chamber with a vacuum degree of -0.092 to -0.098 MPa. The degassed mud in the vacuum chamber is then sheared, squeezed and kneaded by the screw shaft to make the moisture and particles evenly distributed. Finally, it is squeezed out from the die head mold to form a dense, smooth, bubble-free mud segment. After dry mixing, wet mixing is carried out. A very small amount of atomized water is sprayed into the mixture multiple times using a spray bottle. While spraying, the mixture is quickly turned over and crushed and kneaded. The stickiness of the clay when it comes into contact with water is used to further press the carbon powder on the surface into the mud particles and break up any small carbon powder clumps.

[0014] Furthermore, in step S3, during the die-casting molding operation, the drying temperature of the spray drying tower is 300-400 degrees Celsius, the particle size of the granulated powder is 80-200 micrometers, the pressure of the pressurizing device is 50-150 MPa, and the die-casting time is 5-15 minutes. After drying in the spray drying tower, most of the water in the slurry will be removed. At this time, in order to ensure the normal progress of die-casting, a moisture conditioning process is required. 6%-9% of bound water is added to the dried raw material as a temporary binder, and the particle surface is softened and bonded together under high pressure.

[0015] Furthermore, in step S4, during the finishing and firing operation, the drying temperature of the clay pot prototype is 80-120 degrees Celsius, the drying time is 10-20 minutes, the glaze thickness is 0.2-0.4 mm, the firing temperature in the kiln is 1250-1300 degrees Celsius, and the firing time is 48-72 hours. After firing is completed and the pot body is removed, its size and surface defects are checked, and then the finished product is subjected to thermal shock test, lead and cadmium leaching test, and induction cooker adaptability test.

[0016] Compared with existing technologies, the beneficial effects of the method for manufacturing cookware with the function of releasing far-infrared rays upon heating provided by this invention are:

[0017] (1) This invention adds carbon powder to the traditional clay raw material, while precisely controlling the carbon powder content ratio. It uses multiple mixing methods and granulation, drying and die casting processes to increase the carbon powder content. The thermal conductivity, adsorption and far-infrared radiation effects are significantly improved. At the same time, due to its complex bonding process, the stability of the pot body can be guaranteed, and the pot body will not become too brittle or the thermal shock resistance will decrease. The raw material containing carbon powder is die-cast in one piece and vacuum high temperature firing. The carbon powder can act as a conductive medium, so that the pot body itself generates an induced current and heats up. When the induction cooker is working, its internal coil will generate a high-frequency alternating magnetic field. When the pot containing uniformly dispersed carbon powder is placed on the stove surface, the pot body material becomes a conductor. When the alternating magnetic field passes through this conductive pot body, it will directly generate countless tiny eddy currents, i.e. induced currents. Under the resistance of the pot body material itself, these eddy currents quickly convert electrical energy into heat energy, so that the entire pot body heats up evenly and quickly, realizing the heating effect on the induction cooker.

[0018] (2) This invention uses a process of mixing high-density carbon powder with clay raw materials and then performing integral die casting and vacuum firing. When the carbon powder and ceramic substrate are heated, the molecules and atoms inside the pot will vibrate more intensely due to the increase in energy. This intense vibration will radiate energy outward in the form of electromagnetic waves, which includes a large number of far-infrared rays with wavelengths between 3 micrometers and 1000 micrometers. In particular, carbon material itself, as a highly efficient heat absorption and heat radiation material, can more effectively convert heat energy into far-infrared radiation. Therefore, the casserole made by this method can not only be used directly on an induction cooker through heat conduction, but also directly penetrate part of the food surface through the released far-infrared rays, promoting the internal molecular resonance and heat generation, thereby achieving a more uniform and faster heating effect. Moreover, the overall material is lighter than traditional stainless steel and ceramic. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A flowchart illustrating the manufacturing process provided in an embodiment of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] As attached Figure 1 As shown:

[0023] Example 1:

[0024] This invention provides a method for making cookware with the function of releasing far-infrared rays when heated, including: S1 Clay preparation: preparing clay, kaolin, quartz and pre-fired clay particles, mixing these raw materials in proportion, adding water and mixing again to form a clay slurry, grinding the clay slurry using ball milling technology, and finally filtering out impurities from the ground clay slurry using a sieve to obtain a blank slurry.

[0025] S2 Carbon Addition: Prepare carbon powder and sort the carbon powder by particle size using a sieve. Use a dry mixing method to uniformly dry mix the carbon powder raw material with the body raw material. Then add water for wet mixing and vacuum mud refining operation to finally obtain ceramic clay. During dry mixing, first convert the mud slurry into a carrier, that is, dehydrate the mud slurry or use mud powder to make it into dry or semi-dry particles. In the dry state, use mechanical force to embed and adhere the carbon powder particles to the surface of the clay particles.

[0026] S3 Die Casting Molding: Ceramic clay is pumped into a spray drying tower, where hot air dries the slurry droplets and forms hollow spherical particles to obtain granulated powder. An automatic feeder then precisely fills the mold cavity with the granulated powder, and a pressure device is activated to die-cast it. Finally, the mold is demolded to obtain the prototype of the casserole. Spray drying atomizes the uniformly mixed clay into tiny droplets, which are then instantly dried in high-temperature hot air. Each droplet contains tiny units of all the components, ensuring that the chemical composition and carbon powder content of each dried spherical particle are completely consistent with the overall formula, thus avoiding uneven composition and ensuring the consistent performance of the carbon powder casserole.

[0027] S4 Finishing and Firing: The original clay pot is dried to remove the bound water inside, and the surface of the clay pot is trimmed and glazed. Finally, it is sent into the kiln for vacuum firing.

[0028] Working Principle: This invention adds carbon powder to traditional clay raw materials, precisely controlling the proportion of carbon powder content. Utilizing multiple mixing methods and a process of granulation, drying, and die-casting, the carbon powder content is increased, significantly improving thermal conductivity, adsorption, and far-infrared radiation. Simultaneously, its complex bonding process ensures the stability of the pot body, preventing brittleness and reduced thermal shock resistance. The carbon powder-containing raw material is integrally die-cast and then vacuum-fired at high temperature. The carbon powder acts as a conductive medium, causing the pot body to generate an induced current and heat up. When the induction cooker is working, its internal coil generates a high-frequency alternating magnetic field. When the pot containing uniformly dispersed carbon powder is placed on the cooktop, the pot material becomes conductive. As the alternating magnetic field passes through this conductive pot body, countless tiny eddy currents (induced currents) are directly generated within it. These eddy currents, under the resistance of the pot material itself, rapidly convert electrical energy into heat energy, thus causing the entire pot body to heat up evenly and quickly, achieving the heating effect on the induction cooker.

[0029] Example 2:

[0030] As attached Figure 1 As shown:

[0031] In step S1, during the mud preparation operation, the content of clay is 30%-40%, the content of kaolin is 20%-30%, the content of quartz is 15%-25%, and the content of pre-fired clay particles is 15%-30%.

[0032] Specifically, in step S1, the sieve used in the mud preparation operation is a 100-mesh sieve.

[0033] Specifically, in step S2, the carbon powder added accounts for 7%-15% of the total carbon powder content. This range ensures the heat conduction of the pot while preventing the pot from becoming brittle and reducing its thermal shock resistance due to excessive carbon powder content. The carbon powder used has a fineness of 300-400 mesh. The dry mixing time between the carbon powder raw material and the raw material is 15-20 minutes. After dehydrating the slurry to obtain mud particles, the semi-dry mud blocks are broken by hand or tools and then passed through a 40-60 mesh sieve to make uniform, moist mud particles. This increases the contact surface area with the carbon powder, making the mixing more uniform. The sieved mud particles are spread evenly on the workbench, and the sieved carbon powder is sprinkled evenly on the surface of the mud particles in multiple applications. After each layer is sprinkled, it is stirred from the bottom up with a shovel or by hand, similar to kneading dough, to ensure that the carbon powder covers all the mud particles. This allows the carbon powder to physically coat the surface of each moist mud particle, forming a sandwich structure. The mixed material is then a uniform gray-black color.

[0034] Specifically, in step S2, during the carbon powder addition operation, the hard mud cake after filter pressing and dewatering is first crushed and fed into the feeding port of the vacuum mud mixer. The mud is conveyed forward and initially kneaded by the screw shaft. Then it is pushed into the sealed vacuum chamber, where the vacuum degree is -0.092 to -0.098 MPa. The degassed mud in the vacuum chamber is then sheared, squeezed and kneaded by the screw shaft to make the moisture and particles evenly distributed. Finally, it is squeezed out from the die head mold to form a dense, smooth, bubble-free mud segment. After dry mixing, wet mixing is performed. A very small amount of atomized water is sprayed into the mixture multiple times using a spray bottle. While spraying, the mixture is quickly turned over and crushed and kneaded. The stickiness of the clay when it comes into contact with water is used to further press the carbon powder on the surface into the mud particles and break up any small carbon powder clumps.

[0035] Specifically, in step S3, during the die-casting molding operation, the drying temperature of the spray drying tower is 300-400 degrees Celsius, the particle size of the granulated powder is 80-200 micrometers, the pressure of the pressurizing device is 50-150 MPa, and the die-casting time is 5-15 minutes. After drying in the spray drying tower, most of the water in the slurry will be removed. At this time, in order to ensure the normal progress of die-casting, a moisture conditioning process is required. 6%-9% of bound water is added to the dried raw material as a temporary binder, and the particle surface is softened and bonded together under high pressure.

[0036] Specifically, in step S4, during the finishing and firing operation, the drying temperature of the clay pot prototype is 80-120 degrees Celsius, the drying time is 10-20 minutes, the glaze thickness is 0.2-0.4 mm, the firing temperature in the kiln is 1250-1300 degrees Celsius, and the firing time is 48-72 hours. After firing is completed and the pot body is removed, its size and surface defects are checked, and then the finished product is subjected to thermal shock test, lead and cadmium leaching test, and induction cooker adaptability test.

[0037] Working Principle: This invention employs a process of mixing high-density carbon powder with clay raw materials, followed by integral die casting and vacuum firing. When the carbon powder and ceramic substrate are heated, the molecules and atoms inside the pot vibrate more intensely due to increased energy. This intense vibration radiates energy outward in the form of electromagnetic waves, including a large amount of far-infrared rays with wavelengths between 3 and 1000 micrometers. In particular, carbon itself, as a highly efficient heat-absorbing and heat-radiating material, can more effectively convert heat energy into far-infrared radiation. Therefore, the casserole made by this method can not only be used directly on an induction cooker through heat conduction, but also directly penetrate part of the food surface through the released far-infrared rays, promoting the internal molecular resonance and heat generation, thereby achieving a more uniform and faster heating effect. Furthermore, the overall material is lighter than traditional stainless steel and ceramic.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for manufacturing a cookware with the function of releasing far-infrared rays upon heating, characterized in that, Includes the following steps: S1 Clay Preparation: Prepare clay, kaolin, quartz and pre-fired clay particles. Mix these raw materials in proportion, add water and mix again to form clay slurry. Use ball milling technology to grind the clay slurry. Finally, use a sieve to filter out impurities from the ground clay slurry to obtain the body slurry. S2 Carbon Addition: Prepare carbon powder and sort the carbon powder by particle size using a sieve. Use a dry mixing method to uniformly dry mix the carbon powder raw material with the body raw material. Then add water for wet mixing and vacuum clay refining to finally obtain ceramic clay. During dry mixing, first convert the slurry into a carrier, that is, dehydrate the slurry or use clay powder to make it into dry or semi-dry particles. In the dry state, use mechanical force to embed and adhere the carbon powder particles to the surface of the clay particles. S3 Die Casting Molding: Ceramic clay is pumped into a spray drying tower, where hot air dries the slurry droplets and forms hollow spherical particles to obtain granulated powder. An automatic feeder then precisely fills the mold cavity with the granulated powder, and a pressure device is activated to die-cast it. Finally, the mold is demolded to obtain the prototype of the casserole. Spray drying atomizes the uniformly mixed clay into tiny droplets, which are then instantly dried in high-temperature hot air. Each droplet contains tiny units of all the components, ensuring that the chemical composition and carbon powder content of each dried spherical particle are completely consistent with the overall formula, thus avoiding uneven composition and ensuring the consistent performance of the carbon powder casserole. S4 Finishing and Firing: The original clay pot is dried to remove the bound water inside, and the surface of the clay pot is trimmed and glazed. Finally, it is sent into the kiln for vacuum firing.

2. The method for manufacturing a cookware with a heating and far-infrared emission function according to claim 1, characterized in that, In step S1, during the mud preparation operation, the content of clay is 30%-40%, the content of kaolin is 20%-30%, the content of quartz is 15%-25%, and the content of pre-fired clay particles is 15%-30%.

3. A method for manufacturing a cookware with a far-infrared heating function according to claim 1, characterized in that, In step S1, the sieve used in the mud preparation operation is a 100-mesh sieve.

4. A method for manufacturing a cookware with a far-infrared heating function according to claim 1, characterized in that, In step S2, the carbon powder added accounts for 7%-15% of the total carbon powder content. This range ensures the heat conduction of the pot while preventing the pot from becoming brittle and reducing its thermal shock resistance due to excessive carbon powder content. The carbon powder used has a fineness of 300-400 mesh. The dry mixing time between the carbon powder raw material and the raw material is 15-20 minutes. After dehydrating the slurry to obtain mud particles, the semi-dry mud blocks are broken by hand or tools and then passed through a 40-60 mesh sieve to make uniform, moist mud particles. This increases the contact surface area with the carbon powder, making the mixing more uniform. The sieved mud particles are spread evenly on the workbench, and the sieved carbon powder is sprinkled evenly on the surface of the mud particles in multiple applications. After each layer is sprinkled, it is stirred from the bottom up with a shovel or by hand, similar to kneading dough, to ensure that the carbon powder covers all the mud particles. This allows the carbon powder to physically coat the surface of each moist mud particle, forming a sandwich structure. The mixed material is then a uniform gray-black color.

5. A method for manufacturing a cookware with a far-infrared heating function according to claim 1, characterized in that, In step S2, during the carbon powder addition operation, the hard mud cake after pressure filtration and dewatering is first crushed and fed into the feeding port of the vacuum mud mixer. The mud is conveyed forward by the screw shaft and initially kneaded. Then it is pushed into a sealed vacuum chamber with a vacuum degree of -0.092 to -0.098 MPa. The degassed mud in the vacuum chamber is then sheared, squeezed and kneaded by the screw shaft to make the moisture and particles evenly distributed. Finally, it is squeezed out from the die head mold to form a dense, smooth, bubble-free mud segment. After dry mixing, wet mixing is carried out. A very small amount of atomized water is sprayed into the mixture multiple times using a spray bottle. While spraying, the mixture is quickly turned over and crushed and kneaded. The stickiness of the clay when it comes into contact with water is used to further press the carbon powder on the surface into the mud particles and break up any small carbon powder clumps.

6. A method for manufacturing a cookware with a heating and far-infrared emission function according to claim 1, characterized in that, In step S3, during the die-casting molding operation, the drying temperature of the spray drying tower is 300-400 degrees Celsius, the particle size of the granulated powder is 80-200 micrometers, the pressure of the pressurizing device is 50-150 MPa, and the die-casting time is 5-15 minutes. After drying in the spray drying tower, most of the water in the slurry will be removed. At this time, in order to ensure the normal progress of die-casting, a moisture conditioning process is required. 6%-9% of bound water is added to the dried raw material as a temporary binder, and the particle surface is softened and bonded together under high pressure.

7. A method for manufacturing a cookware with a far-infrared heating function according to claim 1, characterized in that, In step S4, during the finishing and firing operation, the drying temperature of the clay pot prototype is 80-120 degrees Celsius, the drying time is 10-20 minutes, the glaze thickness is 0.2-0.4 mm, the firing temperature in the kiln is 1250-1300 degrees Celsius, and the firing time is 48-72 hours. After firing is completed and the pot body is removed, its size and surface defects are checked, and then the finished product is subjected to thermal shock test, lead and cadmium leaching test, and induction cooker adaptability test.

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