Manufacturing method of a cooking machine

Abstract

This invention provides a method for manufacturing a stir-fry machine, belonging to the field of cookware manufacturing technology. The method includes the following steps: using pure titanium powder as raw material, spraying a titanium layer onto the inner surface of the stir-fry machine's inner pot; using composite powder as raw material, spraying a composite layer onto the surface of the titanium layer; the composite powder, by mass percentage, comprises: Al2O3: 30-50%, TiO2: 25-45%, Fe3O4: 9-15%, and TiC: 1-5%; sequentially grinding, cleaning, and pre-irradiating the composite layer with ultraviolet light to obtain a pretreated composite layer; irradiating the pretreated composite layer with ultraviolet light while simultaneously injecting carbon ions to obtain a non-stick inner pot for the stir-fry machine; assembling the non-stick inner pot into the stir-fry machine via explosive bonding to obtain a non-stick stir-fry machine.

Description

Technical Field

[0001] This invention relates to the field of cookware manufacturing technology, and in particular to a method for manufacturing a stir-fry machine. Background Technology

[0002] In existing commercial cooking machines, stainless steel is commonly used as the inner pot material to ensure long-term automated cooking. However, stainless steel itself has poor non-stick properties, leading to severe food scorching and difficulty in cleaning during automated cooking. Furthermore, it exhibits significant discoloration and yellowing, and develops numerous scratches after prolonged use. Additionally, stainless steel can leach heavy metals over time, posing a health risk. Titanium, on the other hand, is not a heavy metal and possesses antibacterial properties, making it an excellent choice for cookware and tableware. However, titanium has low hardness, poor wear resistance, and poor thermal conductivity. Cookware made from pure titanium is prone to scratches during use and has poor non-stick properties. Moreover, during the manufacturing process of commercial cooking machines, the varying elongation of the layers in the layered composite material makes delamination or breakage highly likely during 180° edge rolling, resulting in low yield and inconsistent quality of the finished products.

[0003] Therefore, how to improve the surface hardness and non-stick properties of cooking machines, while simultaneously enhancing the quality stability of cooking machines, has become a pressing technical problem to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a manufacturing and assembly method for the inner pot of a commercial cooking machine. The cooking machine prepared by the manufacturing and assembly method provided by this invention has the characteristics of good thermal conductivity, high surface hardness, and good non-stick properties. At the same time, a special connection method is adopted to connect and assemble the inner pot with the rotating base, which overcomes the problem that delamination or breakage is easy to occur when the layered composite material has different elongation rates during 180° edge rolling, thus improving the quality stability of the cooking machine.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides a method for manufacturing and assembling the inner pot of a commercial cooking machine, comprising the following steps:

[0007] (1) Using pure titanium powder as raw material, a titanium layer is sprayed on the inner surface of the inner pot of the cooking machine;

[0008] (2) Using composite powder as raw material, a composite layer is sprayed onto the surface of the titanium layer obtained in step (1); the composition of the composite powder by mass percentage includes: Al2O3: 30~50%, TiO2: 25~45%, Fe3O4: 9~15% and TiC: 1~5%;

[0009] (3) The composite layer obtained in step (2) is successively polished, cleaned and pre-irradiated with ultraviolet light to obtain a pre-treated composite layer;

[0010] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation and carbon ions are injected simultaneously to obtain a non-stick inner pot for a cooking machine.

[0011] (5) The non-stick cooking machine inner pot obtained in step (4) is assembled into the cooking machine by explosive bonding to obtain a non-stick cooking machine.

[0012] Preferably, the inner liner of the cooking machine in step (1) is an aluminum inner liner or a steel-aluminum composite inner liner with an aluminum inner surface.

[0013] Preferably, the particle size of the pure titanium powder in step (1) is 100~325 mesh.

[0014] Preferably, the titanium layer is sprayed in step (1) by cold spraying, and the working gas used in cold spraying is nitrogen or helium, and the spraying pressure of cold spraying is 4~6MPa.

[0015] Preferably, the thickness of the titanium layer in step (1) is 0.3~0.6 mm.

[0016] Preferably, the particle size of the composite powder in step (2) is 15~45μm.

[0017] Preferably, the spraying method for the composite layer in step (2) is thermal spraying.

[0018] Preferably, the thickness of the composite layer in step (2) is 150~300μm, and the Vickers hardness of the composite layer is >600HV.

[0019] Preferably, the specific operation of the explosive composite in step (5) is as follows: a metal baffle and a boss structure are spot welded on the outer edge of the non-stick cooking machine inner pot, and a cardboard is used as a paper frame on the inner edge. Then the cooking machine inner pot is placed on the rotating base, and an M-shaped gap support is placed in the middle. Explosives are placed in the gap between the metal baffle and the cardboard, and the explosion is detonated at the boss. After the explosion, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, the overall structure is installed on the cooking machine.

[0020] The present invention provides a non-stick cooking machine prepared by the manufacturing and assembly method of the inner pot of the commercial cooking machine described in the above technical solution.

[0021] This invention provides a method for manufacturing and assembling the inner liner of a commercial cooking machine, comprising the following steps: (1) using pure titanium powder as raw material, spraying a titanium layer onto the inner surface of the inner liner of the cooking machine; (2) using composite powder as raw material, spraying a composite layer onto the surface of the titanium layer obtained in step (1); the composition of the composite powder by mass percentage includes: Al2O3: 30~50%, TiO2: 25~45%, Fe3O4: 9~15% and TiC: 1~5%; (3) grinding, cleaning and ultraviolet pre-irradiation of the composite layer obtained in step (2) in sequence to obtain a pretreated composite layer; (4) irradiating the pretreated composite layer obtained in step (3) with ultraviolet light and injecting carbon ions to obtain a non-stick inner liner of the cooking machine; (5) assembling the non-stick inner liner of the cooking machine obtained in step (4) into the cooking machine by explosive bonding to obtain a non-stick cooking machine. This invention first sprays a titanium layer onto the inner surface of the cooking machine's inner pot. The dense titanium layer isolates the aluminum layer from external contact, preventing corrosion due to oxidation. Next, a composite layer is prepared on the titanium layer surface. The TiO2 in the composite layer has high hardness, improving the wear resistance of the inner surface of the inner pot. Simultaneously, the introduction of TiC further enhances the hardness of the composite layer, achieving a Vickers hardness of over 600 HV. Furthermore, the addition of Al2O3 and Fe3O4 not only reduces the cost of the composite powder but also forms ceramic compounds such as FeAlTiO5, further improving the mechanical properties of the composite layer. By controlling the amount of each component in the composite layer, its color can be adjusted, allowing the inner surface color of the inner pot to be adjustable within the blue and black range. Ion implantation in the composite layer reduces the surface friction coefficient, improving the non-stick effect on food. The inner pot is assembled into the cooking machine using an explosive bonding method, solving the problem in existing technologies where, due to the different elongations of the layers in the layered composite material, delamination or breakage easily occurs during 180° edge rolling when connecting by edge rolling. This improves the quality stability of the cooking machine. The results of the embodiments show that the Vickers hardness HV of the inner surface of the inner pot of the cooking machine provided by the present invention is [missing information]. 0.2 >600HV, coefficient of sliding friction <0.35. Attached Figure Description

[0022] Figure 1 This is an assembly diagram of the cooking machine provided by the present invention;

[0023] In the diagram, 1 is the rotating base, 2 is the M-shaped gap support, 3 is the inner liner, 4 is the explosive, 5 is the paper frame, and 6 is the metal frame and boss.

[0024] Figure 2 This is a front view of the cooking machine provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the overall cooking machine provided by the present invention. Detailed Implementation

[0026] This invention provides a method for manufacturing and assembling the inner pot of a commercial cooking machine, comprising the following steps:

[0027] (1) Using pure titanium powder as raw material, a titanium layer is sprayed on the inner surface of the inner pot of the cooking machine;

[0028] (2) Using composite powder as raw material, a composite layer is sprayed onto the surface of the titanium layer obtained in step (1); the composition of the composite powder by mass percentage includes: Al2O3: 30~50%, TiO2: 25~45%, Fe3O4: 9~15% and TiC: 1~5%;

[0029] (3) The composite layer obtained in step (2) is successively polished, cleaned and pre-irradiated with ultraviolet light to obtain a pre-treated composite layer;

[0030] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation and carbon ions are injected simultaneously to obtain a non-stick inner pot for a cooking machine.

[0031] (5) The non-stick cooking machine inner pot obtained in step (4) is assembled into the cooking machine by explosive bonding to obtain a non-stick cooking machine.

[0032] This invention uses pure titanium powder as raw material to spray a titanium layer onto the inner surface of the inner pot of a cooking machine. Preferably, the titanium layer spraying process is not performed on the outer edge of the inner pot of the cooking machine.

[0033] In this invention, the inner pot of the cooking machine is preferably made of aluminum or a steel-aluminum composite inner pot with an aluminum inner surface. This invention does not impose any specific limitations on the source of the inner pot; commercially available products well-known to those skilled in the art or those prepared in-house are acceptable.

[0034] In this invention, the inner surface of the cooking machine inner pot is preferably sandblasted before use. The specific operation of the sandblasting process is not particularly limited; any process well-known to those skilled in the art can be used. By sandblasting the inner surface of the cooking machine inner pot, the oxide layer on the inner surface can be removed, thereby making the titanium layer more firmly bonded to the inner surface of the cooking machine inner pot.

[0035] In this invention, the particle size of the pure titanium powder is preferably 100-325 mesh, more preferably 125-300 mesh. By controlling the particle size of the pure titanium powder, this invention can improve the density of the titanium layer and further isolate the inner surface of the liner from the outside environment.

[0036] In this invention, the preferred method for applying the titanium layer is cold spraying; the preferred working gas for cold spraying is nitrogen or helium; the preferred spraying pressure is 4-6 MPa; and the preferred preheating temperature is 600-800°C. By using cold spraying to prepare the titanium layer, this invention improves the adhesion between the titanium layer and the inner surface of the liner, allowing the titanium layer to adhere better to the liner and prevent it from easily falling off.

[0037] In this invention, the thickness of the titanium layer is preferably 0.3~0.6 mm, more preferably 0.4~0.5 mm. By controlling the thickness of the titanium layer, this invention can further isolate the inner surface of the liner from contact with the outside environment.

[0038] After obtaining the titanium layer, the present invention uses composite powder as raw material to spray a composite layer onto the surface of the titanium layer. In the present invention, the process of spraying the composite layer is preferably not carried out on the outer edge of the inner pot of the cooking machine.

[0039] In this invention, the composite powder preferably comprises, by mass percentage: Al2O3: 30-50%, TiO2: 25-45%, Fe3O4: 9-15%, and TiC: 1-5%, more preferably: Al2O3: 35-45%, TiO2: 30-40%, Fe3O4: 10-12%, and TiC: 2-4%. In this invention, the particle size of the composite powder is preferably 15-45 μm, more preferably 18-42 μm. By controlling the content of each component in the composite powder, this invention can further improve the hardness and wear resistance of the inner surface of the liner, while also allowing the color of the composite layer to be adjusted within the blue and black range, thus improving product differentiation.

[0040] In this invention, the preferred method for applying the composite layer is thermal spraying. This invention does not impose any specific limitations on the thermal spraying method or process parameters; any thermal spraying method well-known to those skilled in the art can be used to apply the composite layer.

[0041] In this invention, the thickness of the composite layer is preferably 150~300μm; the Vickers hardness of the composite layer is preferably >600HV. By controlling the thickness of the composite layer, this invention can significantly improve the hardness of the inner surface of the liner and increase its wear resistance.

[0042] After obtaining the composite layer, the present invention sequentially performs grinding, cleaning, and ultraviolet pre-irradiation on the composite layer to obtain a pretreated composite layer. In the present invention, the grinding, cleaning, and ultraviolet pre-irradiation processes are preferably not performed on the outer edge of the inner pot of the cooking machine.

[0043] In this invention, the polishing is preferably performed by sequentially using a 400-grit silicon carbide grinding wheel and a 2000-grit silicon carbide grinding wheel. More preferably, the 400-grit silicon carbide grinding wheel is used first to polish the composite layer until the surface roughness reaches Ra3.2 or less, and then the 2000-grit silicon carbide grinding wheel is used to polish the composite layer until the surface roughness reaches Ra1.0 or less. By polishing the composite layer, this invention can process the inner surface of the liner to a near-mirror finish, facilitating subsequent processes and increasing aesthetics.

[0044] This invention does not impose any special limitations on the use of a 400-grit silicon carbide grinding wheel for polishing, as long as the surface roughness of the composite layer reaches Ra3.2 or below. This invention also does not impose any special limitations on the use of a 2000-grit silicon carbide grinding wheel for polishing, as long as the surface roughness of the composite layer reaches Ra1.0 or below.

[0045] In this invention, the preferred cleaning operation is to use an ultrasonic cleaner containing deionized water. This invention does not impose specific limitations on the parameters of the cleaning equipment, as long as it effectively removes impurities. By cleaning the inner pot of the cooking machine, this invention removes residual impurities after polishing, preventing these impurities from affecting the inner surface of the inner pot.

[0046] In this invention, the ultraviolet pre-irradiation operation is preferably performed using ultraviolet light in a vacuum chamber. In this invention, the pressure of the vacuum chamber is preferably 10... -4 Pa~10 2 Pa; the preferred UV pre-irradiation time is 15-25 min. This invention improves the surface activity of the workpiece through UV pre-irradiation.

[0047] After obtaining the pretreated composite layer, the present invention irradiates the pretreated composite layer with ultraviolet light and simultaneously injects carbon ions to obtain a non-stick inner pot for a cooking machine. In the present invention, the carbon ion injection process is preferably not performed on the outer edge of the inner pot of the cooking machine.

[0048] In this invention, the ultraviolet irradiation is preferably performed in a vacuum chamber using ultraviolet light. In this invention, the pressure of the vacuum chamber is preferably 10... -4 Pa~10 2 Pa.

[0049] In this invention, the preferred method for implanting carbon ions is ion implantation. The preferred ion source for this method is an electron cyclotron resonance type; the preferred accelerating voltage for the ions is 7.5~30kV; and the preferred implantation amount of carbon ions is 3×10⁻⁶. 17 / cm 2 ~10×10 17 / cm 2The preferred implantation depth of the carbon ions is 0.3~1.2μm, more preferably 0.5~1.0μm. This invention introduces carbon ions into the composite layer via ion implantation, reducing the coefficient of friction of the composite layer and improving its non-stick properties to food.

[0050] After obtaining the non-stick cooking machine inner pot, the present invention assembles the non-stick cooking machine inner pot into the cooking machine through explosive bonding, thereby obtaining a non-stick cooking machine.

[0051] In this invention, the preferred specific operation of the explosive composite is as follows: a metal baffle and a boss structure are spot-welded to the outer edge of the non-stick inner pot of the cooking machine, and a cardboard is used as the paper frame for the inner edge. Then, the inner pot of the cooking machine is placed on the rotating base, and an M-shaped gap support is placed in the middle. Explosives are placed in the gap between the metal baffle and the cardboard, and the explosion is detonated at the boss. After the explosion, the edge of the inner pot of the cooking machine is tightly connected to the rotating base. After being shaped by a press, the edge part is cut off to obtain the overall structure of the inner pot of the cooking machine connected to the rotating base. Finally, the overall structure is installed on the cooking machine.

[0052] In this invention, the height of the M-type gap support is preferably 4~8mm.

[0053] In this invention, the explosive is preferably an ammonium nitrate oil (ANFO) explosive or a powdered emulsion explosive. In this invention, the composition of the ANFO explosive, by weight percentage, is preferably: raw ANFO explosive: 60-65 wt.%, NaCl: 27.5-31.5 wt.%, wood flour: 7.5-8.5 wt.%; the density of the ANFO explosive is preferably 0.65-0.7 g / cm³. 3 The detonation velocity of the ammonium nitrate explosive is preferably 1950~2150 m / s; the saturation of the ammonium nitrate explosive is preferably 7.0 mm~7.5 mm lead. In this invention, the composition of the powdered emulsion explosive, by mass percentage, is preferably: original powdered emulsion explosive: 62~67 wt.%, stone powder: 26.5~30.5 wt.%, wood powder: 6.5~7.5 wt.%; the density of the powdered emulsion explosive is preferably 0.7~0.75 g / cm³. 3 The detonation velocity of the powdered emulsion explosive is preferably 2000~2200 m / s; the briss of the powdered emulsion explosive is preferably 6.8 mm~7.2 mm lead. This invention does not impose any special limitations on the specific source of the explosive; commercially available products well-known to those skilled in the art can be used.

[0054] In this invention, the preferred laying height of the explosive is 25-40 mm. By controlling the laying height of the explosive, this invention ensures a tight connection between the edge of the inner pot of the cooking machine and the rotating base during the detonation and compounding process.

[0055] This invention first sprays a titanium layer onto the inner surface of the cooking machine's inner pot. The dense titanium layer isolates the aluminum layer from external contact, preventing corrosion due to oxidation. Next, a composite layer is prepared on the titanium layer surface. The TiO2 in the composite layer has high hardness, improving the wear resistance of the inner surface of the inner pot. Simultaneously, the introduction of TiC further enhances the hardness of the composite layer, achieving a Vickers hardness of over 600 HV. Furthermore, the addition of Al2O3 and Fe3O4 not only reduces the cost of the composite powder but also forms ceramic compounds such as FeAlTiO5, further improving the mechanical properties of the composite layer. By controlling the amount of each component in the composite layer, its color can be adjusted, allowing the inner surface color of the inner pot to be adjustable within the blue and black range. Ion implantation in the composite layer reduces the surface friction coefficient, improving the non-stick effect on food. The inner pot is assembled into the cooking machine using an explosive bonding method, solving the problem in existing technologies where, due to the different elongations of the layers in the layered composite material, delamination or breakage easily occurs during 180° edge rolling when connecting by edge rolling. This improves the quality stability of the cooking machine.

[0056] This invention provides a non-stick cooking machine prepared by the manufacturing and assembly method of the inner pot of a commercial cooking machine as described in the above technical solution. The cooking machine prepared by this invention has the characteristics of low coefficient of friction, good non-stick performance, good thermal conductivity and high surface hardness. At the same time, the color of the inner pot of the cooking machine is adjustable, which can increase the customer's choice and improve the product differentiation.

[0057] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0058] Example 1

[0059] A method for manufacturing and assembling the inner pot of a commercial cooking machine comprises the following steps:

[0060] (1) The inner surface of the aluminum inner pot of the cooking machine is sandblasted, and then 200-mesh pure titanium powder is used as raw material to cold spray the inner surface of the aluminum inner pot of the cooking machine to obtain a titanium layer with a thickness of 0.4mm; the working gas used for cold spraying is helium, the spraying pressure of cold spraying is 4MPa, and the preheating temperature of cold spraying is 650℃.

[0061] (2) Using composite powder with a particle size of 45 μm as raw material, a composite layer with a thickness of 250 μm is prepared on the surface of the titanium layer obtained in step (1) by thermal spraying; the composition of the composite powder by mass percentage is: Al2O3: 40%, TiO2: 45%, Fe3O4: 12% and TiC: 3%;

[0062] (3) First, use a 400-grit silicon carbide grinding wheel to polish the composite layer obtained in step (2) until the surface roughness of the composite layer reaches Ra3.2 or less. Then, use a 2000-grit silicon carbide grinding wheel to further polish the composite layer until the surface roughness of the composite layer reaches Ra1.0 or less. Then, use an ultrasonic device with added deionized water for cleaning. Finally, pre-irradiate with ultraviolet light in a vacuum chamber to obtain a pre-treated composite layer. The pressure of the vacuum chamber is 10. 2 Pa; the ultraviolet pre-irradiation time is 15 min;

[0063] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation, and carbon ions are simultaneously implanted into the composite layer using ion implantation to obtain a non-stick inner liner for a cooking machine; the ion source used in the ion implantation method is an electron cyclotron resonance type; the accelerating voltage of the ions in the ion implantation method is 10kV; the amount of carbon ions implanted is 4×10 17 / cm 2 The carbon ion implantation depth is 0.4 μm.

[0064] (5) Weld metal baffles and boss structures to the outer edge of the non-stick cooking machine inner pot obtained in step (4), and use cardboard as the paper frame for the inner edge. Then place the cooking machine inner pot on the rotating base, place an M-shaped gap support with a height of 6mm in the middle, place explosives in the gap between the metal baffles and the cardboard, and detonate at the boss. After detonation, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, install the overall structure on the cooking machine to obtain a non-stick cooking machine.

[0065] The explosive is an ammonium nitrate (ANN) explosive; the composition of the ANN explosive is: raw ANN explosive: 61.5 wt.%, NaCl: 30.5 wt.%, wood flour: 8 wt.%; the density of the ANN explosive is 0.68 g / cm³. 3 The detonation velocity of the ammonium nitrate explosive is 2050 m / s; the saturation of the ammonium nitrate explosive is 7.2 mm lead; and the laying height of the explosive is 25 mm.

[0066] An assembly diagram of the cooking machine prepared in Example 1 is shown below. Figure 1 As shown:

[0067] In the diagram, 1 is the rotating base, 2 is the M-shaped gap support, 3 is the inner liner, 4 is the explosive, 5 is the paper frame, and 6 is the metal frame and boss.

[0068] The front view of the cooking machine prepared in Example 1 is shown below. Figure 2 As shown.

[0069] A schematic diagram of the cooking machine prepared in Example 1 is shown below. Figure 3 As shown.

[0070] Example 2

[0071] A method for manufacturing and assembling the inner pot of a commercial cooking machine comprises the following steps:

[0072] (1) The inner surface of the steel-aluminum composite inner liner of the cooking machine is sandblasted, and then 250 mesh pure titanium powder is used as raw material to cold spray the inner surface of the steel-aluminum composite inner liner of the cooking machine to obtain a titanium layer with a thickness of 0.3 mm; the working gas used for cold spraying is helium, the spraying pressure of cold spraying is 5 MPa, and the preheating temperature of cold spraying is 600℃.

[0073] (2) Using composite powder with a particle size of 30 μm as raw material, a composite layer with a thickness of 300 μm is prepared on the surface of the titanium layer obtained in step (1) by thermal spraying; the composition of the composite powder by mass percentage is: Al2O3: 50%, TiO2: 30%, Fe3O4: 15% and TiC: 5%;

[0074] (3) First, use a 400-grit silicon carbide grinding wheel to polish the composite layer obtained in step (2) until the surface roughness of the composite layer reaches Ra3.2 or less. Then, use a 2000-grit silicon carbide grinding wheel to further polish the composite layer until the surface roughness of the composite layer reaches Ra1.0 or less. Then, use an ultrasonic device with added deionized water for cleaning. Finally, pre-irradiate with ultraviolet light in a vacuum chamber to obtain a pre-treated composite layer. The pressure of the vacuum chamber is 10. -1 Pa; The ultraviolet pre-irradiation time is 25 min;

[0075] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation, and carbon ions are simultaneously implanted into the composite layer using ion implantation to obtain a non-stick inner liner for a cooking machine; the ion source used in the ion implantation method is an electron cyclotron resonance type; the accelerating voltage of the ions in the ion implantation method is 20kV; the amount of carbon ions implanted is 5×10 17 / cm 2 The carbon ion implantation depth is 0.65 μm.

[0076] (5) Weld metal baffles and boss structures to the outer edge of the non-stick cooking machine inner pot obtained in step (4), and use cardboard as the paper frame for the inner edge. Then place the cooking machine inner pot on the rotating base, place an M-shaped gap support with a height of 5mm in the middle, place explosives in the gap between the metal baffle and the cardboard, and detonate at the boss. After detonation, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, install the overall structure on the cooking machine to obtain a non-stick cooking machine.

[0077] The explosive is an ammonium nitrate (ANN) explosive; the composition of the ANN explosive is: raw ANN explosive: 63.5 wt.%, NaCl: 28 wt.%, wood flour: 8.5 wt.%; the density of the ANN explosive is 0.7 g / cm³. 3 The detonation velocity of the ammonium nitrate explosive is 1980 m / s; the saturation of the ammonium nitrate explosive is 7.3 mm lead column; and the laying height of the explosive is 28 mm.

[0078] Example 3

[0079] A method for manufacturing and assembling the inner pot of a commercial cooking machine comprises the following steps:

[0080] (1) The inner surface of the aluminum inner pot of the cooking machine is sandblasted, and then 200-mesh pure titanium powder is used as raw material to cold spray the inner surface of the aluminum inner pot of the cooking machine to obtain a titanium layer with a thickness of 0.6mm; the working gas used for cold spraying is helium, the spraying pressure of cold spraying is 6MPa, and the preheating temperature of cold spraying is 700℃.

[0081] (2) Using composite powder with a particle size of 45 μm as raw material, a composite layer with a thickness of 200 μm is prepared on the surface of the titanium layer obtained in step (1) by thermal spraying. The composition of the composite powder by mass percentage is: Al2O3: 45%, TiO2: 41.5%, Fe3O4: 10% and TiC: 3.5%. (3) First, the composite layer obtained in step (2) is polished with a 400-mesh silicon carbide grinding wheel to make the surface roughness of the composite layer reach Ra3.2 or less. Then, the composite layer is further polished with a 2000-mesh silicon carbide grinding wheel to make the surface roughness of the composite layer reach Ra1.0 or less. Then, it is cleaned with an ultrasonic device containing deionized water. Finally, it is pre-irradiated with ultraviolet light in a vacuum chamber to obtain a pre-treated composite layer. The pressure of the vacuum chamber is 10. 2 Pa; the ultraviolet pre-irradiation time is 15 min;

[0082] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation, and carbon ions are simultaneously implanted into the composite layer using ion implantation to obtain a non-stick inner liner for a cooking machine; the ion source used in the ion implantation method is an electron cyclotron resonance type; the accelerating voltage of the ions in the ion implantation method is 20kV; the amount of carbon ions implanted is 6×10 17 / cm 2 The carbon ion implantation depth is 0.7 μm.

[0083] (5) Weld metal baffles and boss structures to the outer edge of the non-stick cooking machine inner pot obtained in step (4), and use cardboard as the paper frame for the inner edge. Then place the cooking machine inner pot on the rotating base, place an M-shaped gap support with a height of 6mm in the middle, place explosives in the gap between the metal baffles and the cardboard, and detonate at the boss. After detonation, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, install the overall structure on the cooking machine to obtain a non-stick cooking machine.

[0084] The explosive is a powdered emulsion explosive; the composition of the powdered emulsion explosive is: original powdered emulsion explosive: 65 wt.%, stone powder: 27.5 wt.%, wood powder: 7.5 wt.%; the density of the powdered emulsion explosive is 0.7~0.75 g / cm³. 3 The detonation velocity of the powdered emulsion explosive is 2100 m / s; the briss of the powdered emulsion explosive is 7 mm lead; and the laying height of the explosive is 35 mm.

[0085] Example 4

[0086] A method for manufacturing and assembling the inner pot of a commercial cooking machine comprises the following steps:

[0087] (1) The inner surface of the steel-aluminum composite inner liner of the cooking machine is sandblasted, and then 325 mesh pure titanium powder is used as raw material to cold spray the inner surface of the steel-aluminum composite inner liner of the cooking machine to obtain a titanium layer with a thickness of 0.5 mm; the working gas used for cold spraying is helium, the spraying pressure of cold spraying is 5.5 MPa, and the preheating temperature of cold spraying is 680℃.

[0088] (2) Using composite powder with a particle size of 45 μm as raw material, a composite layer with a thickness of 160 μm is prepared on the surface of the titanium layer obtained in step (1) by thermal spraying. The composition of the composite powder by mass percentage is: Al2O3: 35%, TiO2: 45%, Fe3O4: 15% and TiC: 5%. (3) First, the composite layer obtained in step (2) is polished with a 400-mesh silicon carbide grinding wheel to make the surface roughness of the composite layer reach Ra3.2 or less. Then, the composite layer is further polished with a 2000-mesh silicon carbide grinding wheel to make the surface roughness of the composite layer reach Ra1.0 or less. Then, it is cleaned with an ultrasonic device containing deionized water. Finally, it is pre-irradiated with ultraviolet light in a vacuum chamber to obtain a pre-treated composite layer. The pressure of the vacuum chamber is 10. -3 Pa; The ultraviolet pre-irradiation time is 15 min;

[0089] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation, and carbon ions are injected into the composite layer using ion implantation to obtain a non-stick inner pot for a cooking machine; the ion source used in the ion implantation method is an electron cyclotron resonance type; the accelerating voltage of the ions in the ion implantation method is 15kV; the amount of carbon ions implanted is 4×10 17 / cm 2 The carbon ion implantation depth is 0.5 μm.

[0090] (5) Weld metal baffles and boss structures to the outer edge of the non-stick cooking machine inner pot obtained in step (4), and use cardboard as the paper frame for the inner edge. Then place the cooking machine inner pot on the rotating base, place an M-shaped gap support with a height of 7mm in the middle, place explosives in the gap between the metal baffle and the cardboard, and detonate at the boss. After detonation, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, install the overall structure on the cooking machine to obtain a non-stick cooking machine.

[0091] The explosive is a powdered emulsion explosive; the composition of the powdered emulsion explosive is: original powdered emulsion explosive: 65 wt.%, stone powder: 28.5 wt.%, wood powder: 6.5 wt.%; the density of the powdered emulsion explosive is 0.71 g / cm³. 3 The detonation velocity of the powdered emulsion explosive is 2150 m / s; the briss of the powdered emulsion explosive is 6.9 mm lead; and the laying height of the explosive is 38 mm.

[0092] Example 5

[0093] A method for manufacturing and assembling the inner pot of a commercial cooking machine comprises the following steps:

[0094] (1) The inner surface of the steel-aluminum composite inner liner of the cooking machine is sandblasted, and then 200-mesh pure titanium powder is used as raw material to cold spray the inner surface of the steel-aluminum composite inner liner of the cooking machine to obtain a titanium layer with a thickness of 0.3mm; the working gas used for cold spraying is helium, the spraying pressure of cold spraying is 5MPa, and the preheating temperature of cold spraying is 720℃.

[0095] (2) Using composite powder with a particle size of 45 μm as raw material, a composite layer with a thickness of 240 μm is prepared on the surface of the titanium layer obtained in step (1) by thermal spraying. The composition of the composite powder by mass percentage is: Al2O3: 42.5%, TiO2: 44.5%, Fe3O4: 11.5% and TiC: 1.5%. (3) First, the composite layer obtained in step (2) is polished with a 400-mesh silicon carbide grinding wheel to make the surface roughness of the composite layer reach Ra3.2 or less. Then, the composite layer is further polished with a 2000-mesh silicon carbide grinding wheel to make the surface roughness of the composite layer reach Ra1.0 or less. Then, it is cleaned with an ultrasonic device containing deionized water. Finally, it is pre-irradiated with ultraviolet light in a vacuum chamber to obtain a pre-treated composite layer. The pressure of the vacuum chamber is 10. -4 Pa; The ultraviolet pre-irradiation time is 25 min;

[0096] (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation, and carbon ions are simultaneously implanted into the composite layer using ion implantation to obtain a non-stick inner liner for a cooking machine; the ion source used in the ion implantation method is an electron cyclotron resonance type; the accelerating voltage of the ions in the ion implantation method is 25kV; the amount of carbon ions implanted is 9×10 17 / cm 2 The carbon ion implantation depth is 1.0 μm.

[0097] (5) Weld metal baffles and boss structures to the outer edge of the non-stick cooking machine inner pot obtained in step (4), and use cardboard as the paper frame for the inner edge. Then place the cooking machine inner pot on the rotating base, place an M-shaped gap support with a height of 8mm in the middle, place explosives in the gap between the metal baffle and the cardboard, and detonate at the boss. After detonation, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, install the overall structure on the cooking machine to obtain a non-stick cooking machine.

[0098] The explosive is an ammonium nitrate (ANN) explosive; the composition of the ANN explosive is: raw ANN explosive: 60.5 wt.%, NaCl: 31.5 wt.%, wood flour: 8 wt.%; the density of the ANN explosive is 0.66 g / cm³. 3The detonation velocity of the ammonium nitrate explosive is 2100 m / s; the saturation of the ammonium nitrate explosive is 7.0 mm lead column; and the laying height of the explosive is 29 mm.

[0099] Examples 1-5 all yielded an integrated inner pot structure for commercial cooking machines with high wear resistance, high colorfastness, good thermal conductivity, and good food non-stick properties.

[0100] Comparative Example 1

[0101] 304 stainless steel sample

[0102] Comparative Example 2

[0103] TA1 titanium sample

[0104] The performance of the inner surfaces of the cooking machine inner pots prepared in Examples 1-5 and the inner surfaces of existing cooking machine samples were tested, and the results are shown in Table 1:

[0105] Table 1. Performance of the inner surface of the cooking machine inner pot provided in Examples 1-5 and Comparative Examples 1-2

[0106]

[0107] As can be seen from Table 1, the Vickers hardness of the inner surface of the cooking machine inner pot prepared by the present invention is significantly higher than that of the inner surface of the cooking machine inner pot when stainless steel or titanium layer is used in the prior art. At the same time, the sliding friction coefficient is significantly reduced, indicating that the technical solution of the present invention can greatly improve the hardness and wear resistance of the inner surface of the cooking machine inner pot, while giving it excellent non-stick properties.

[0108] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for manufacturing a cooking machine, comprising the following steps: (1) Using pure titanium powder as raw material, a titanium layer is sprayed on the inner surface of the inner pot of the cooking machine; (2) Using composite powder as raw material, a composite layer is sprayed onto the surface of the titanium layer obtained in step (1); The composite powder comprises, by mass percentage: Al2O3: 30-50%, TiO2: 25-45%, Fe3O4: 9-15%, and TiC: 1-5%; (3) The composite layer obtained in step (2) is successively polished, cleaned and pre-irradiated with ultraviolet light to obtain a pre-treated composite layer; (4) The pretreated composite layer obtained in step (3) is subjected to ultraviolet irradiation and carbon ions are injected simultaneously to obtain a non-stick inner pot for a cooking machine. (5) The non-stick cooking machine inner pot obtained in step (4) is assembled into the cooking machine by explosive bonding to obtain a non-stick cooking machine. The specific operation of the explosive composite in step (5) is as follows: spot weld a metal baffle and a boss structure on the outer edge of the non-stick cooking machine inner pot, and use cardboard as a paper frame on the inner edge. Then place the cooking machine inner pot on the rotating base, place an M-shaped gap support in the middle, place explosives in the gap between the metal baffle and the cardboard, and detonate at the boss. After detonation, the edge of the cooking machine inner pot and the rotating base are tightly connected. After being shaped by a press, the edge part is cut off to obtain the overall structure of the cooking machine inner pot connected to the rotating base. Finally, the overall structure is installed on the cooking machine.

2. The method of manufacturing a cooking appliance according to claim 1, wherein The inner liner of the cooking machine in step (1) is an aluminum inner liner or a steel-aluminum composite inner liner with an aluminum inner surface.

3. The method of claim 1, wherein the cooking apparatus is a cooking apparatus of claim 1. The particle size of the pure titanium powder in step (1) is 100~325 mesh.

4. The method for manufacturing a stir-fry machine according to claim 1, characterized in that, In step (1), the titanium layer is sprayed by cold spraying. The working gas used in cold spraying is nitrogen or helium, and the spraying pressure is 4~6MPa.

5. The method for manufacturing a stir-fry machine according to claim 1, characterized in that, The thickness of the titanium layer in step (1) is 0.3~0.6mm.

6. The method for manufacturing a stir-fry machine according to claim 1, characterized in that, The particle size of the composite powder in step (2) is 15~45μm.

7. The method for manufacturing a stir-fry machine according to claim 1, characterized in that, The spraying method for the composite layer in step (2) is thermal spraying.

8. The method for manufacturing a stir-fry machine according to claim 1, characterized in that, In step (2), the thickness of the composite layer is 150~300μm, and the Vickers hardness of the composite layer is >600HV.

9. A non-stick cooking machine prepared by the manufacturing method of any one of claims 1 to 8.

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