Cooker

Abstract

The utility model provides a cooker. The cooker comprises a base body and a titanium oxide layer, at least the bottom wall face of the base body is provided with a concave-convex structure, the concave-convex structure comprises a plurality of protrusions protruding out of the inner surface of the base body and grooves located between the adjacent protrusions, or the concave-convex structure comprises a plurality of grooves and protrusions located between the adjacent grooves; the titanium oxide layer is formed in the groove of the concave-convex structure, and a preset distance is reserved between the titanium oxide layer and the groove opening of the groove. According to the cooker provided by the utility model, the titanium oxide layer is better than a metal material in non-stickiness, is arranged in the groove of the concave-convex structure, is slightly lower than the notch of the groove and keeps a certain preset distance, so that the surface of the titanium oxide layer can be in contact with food materials in the use process of the cooker, and the surface of the titanium oxide layer can be in contact with the food materials due to the fact that a certain distance is kept between the titanium oxide layer and the notch of the groove; the titanium oxide layer can be prevented from being damaged by external force, so that the cooker can have both initial non-stickiness and lasting non-stickiness.

Description

Technical Field

[0001] This utility model relates to the field of kitchen utensils technology, specifically to a cooking utensil. Background Technology

[0002] In this field, fluoropolymer coatings are liquid non-stick coatings. Although non-stick layers made with fluoropolymer coatings have excellent initial non-stick properties, they are easily damaged by spatulas and are prone to aging or decomposition due to high temperatures during use. This severely affects the service life of coatings formed by fluoropolymer coatings, resulting in generally poor long-term non-stick properties.

[0003] Therefore, developing cookware that combines initial non-stick properties with long-lasting non-stick properties remains a problem that needs to be solved. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a cookware that solves the problem that cookware cannot simultaneously possess both initial non-stick and long-lasting non-stick properties.

[0005] According to the present invention, a cooker is provided, wherein the cooker includes a base and a titanium oxide layer, and the base has an uneven structure on at least the bottom wall surface, wherein the uneven structure includes a plurality of protrusions protruding from the inner surface of the base and grooves located between adjacent protrusions, or the uneven structure includes a plurality of grooves and protrusions located between adjacent grooves; the titanium oxide layer is formed in the grooves of the uneven structure and is at a predetermined distance from the opening of the groove.

[0006] According to the cookware provided by this utility model, the titanium oxide layer has better non-stick properties than metal materials. It is set in the groove of the concave-convex structure, slightly lower than the groove opening and maintaining a certain preset distance. In this way, during the use of the cookware, the surface of the titanium oxide layer can come into contact with the food, and because it maintains a certain distance from the groove opening, it can prevent the titanium oxide layer from being damaged by external forces, thus enabling the cookware to have both initial non-stick and long-lasting non-stick properties.

[0007] In some embodiments, the height of the protrusion is H1, wherein 80 micrometers ≤ H1 ≤ 200 micrometers; and / or the width of the protrusion is W1, wherein 0.3 millimeters ≤ W1 ≤ 3 millimeters. If the height and width of the protrusion are too high, the area of ​​the groove will be relatively small, resulting in a smaller titanium oxide layer, which will affect the non-stick performance to some extent. If the height and width of the protrusion are too low, the metallic luster brought by the exposed protrusion will be weakened, affecting the appearance of the cookware. Furthermore, in the subsequent sanding step, because the protrusion is not obvious, it is easy to damage the titanium oxide layer in the groove during operation. And / or, the depth of the groove is H2, where 80 micrometers ≤ H2 ≤ 200 micrometers; and / or, the width of the groove is W2, where 0.3 millimeters ≤ W2 ≤ 3 millimeters. If the width of the groove is too large and the depth is too deep, the food is easy to get stuck in the groove of the uneven structure and is not easy to clean. If the width of the groove is too small and the depth is too shallow, the plasma spraying will easily completely fill the groove or cover the entire surface of the uneven structure, making process control difficult, yielding a low pass rate, and increasing the difficulty of subsequent sanding.

[0008] In some embodiments, the protrusions are metal protrusions, and the upper surfaces of a plurality of the protrusions form part of the inner surface of the cookware. This enhances the gloss of the inner surface of the cookware due to the metallic sheen, ensuring the cookware's aesthetic appeal while also improving its durability.

[0009] In some embodiments, the distance between the upper surface of the titanium oxide layer and the opening of the groove is not less than 20 micrometers. Thus, during use, the surface of the titanium oxide layer can contact the food, and because it maintains a certain distance from the opening of the groove, it can prevent direct damage from external forces, thereby enabling the cookware to possess both initial non-stick and long-lasting non-stick properties.

[0010] In some embodiments, the thickness of the titanium oxide layer is d1, wherein 20 micrometers ≤ d1 ≤ 50 micrometers. If the titanium oxide layer is too thin, it is difficult to control the uniformity of the titanium oxide layer during the preparation process, resulting in localized missed spraying or uneven thickness, affecting the appearance of the cookware and reducing its non-stick effect. If the titanium oxide layer is too thick, it will cover too many protrusions, and may even fill the grooves, which may prevent the desired cookware structure from being obtained, and will also increase the difficulty of the subsequent sanding step.

[0011] In some embodiments, the titanium dioxide layer is formed of black titanium dioxide particles. Black titanium dioxide has an amorphous structure, exhibiting good non-stick properties and stable characteristics, providing better non-stick properties for cookware and preventing discoloration due to high temperatures or chemical reactions during use. Furthermore, the black appearance of titanium dioxide offers a different visual effect, ensuring the cookware's aesthetics and mitigating the impact of discoloration on user experience. And / or, the titanium dioxide layer is a plasma layer, which is dense and uniform, enhancing the cookware's corrosion resistance. And / or, the black titanium dioxide particles have a particle size of 15-45 micrometers; and / or, the amorphous phase volume fraction of the titanium dioxide layer is 30%-55%, optimizing the titanium dioxide layer's properties in terms of non-stickness, corrosion resistance, and other aspects.

[0012] In some embodiments, the ratio of the projected areas of the protrusions and the grooves on the surface of the substrate is (2-3):(7-8). This means that the grooves occupy a relatively large area on the substrate surface, ensuring that the titanium oxide layer filling the grooves has sufficient thickness and uniformity, thus maximizing its non-stick effect. Furthermore, with this distribution, the protrusions are also densely distributed, providing good physical protection for the titanium oxide layer in the grooves. The protrusions have high hardness and wear resistance, resisting scratches and abrasions during cooking (e.g., resisting scratches from a spatula on the titanium oxide in the recesses during use), thereby extending the lifespan of the cookware.

[0013] In some embodiments, the protrusion is at least one of annular, columnar, and conical shapes; and / or the groove is at least one of annular, columnar, and conical shapes, forming a variety of concave-convex structure shapes, so as to ensure that the groove for forming the titanium oxide layer can be enclosed while taking into account a certain degree of aesthetics.

[0014] In some embodiments, the substrate is a titanium substrate, a stainless steel substrate, or a composite substrate. A variety of substrate types are applicable, allowing for selective application based on manufacturing needs to produce cookware with the desired performance. And / or, the substrate is formed by stamping, etching, or laser engraving to create the substrate with the aforementioned uneven structure. This simplifies the cookware manufacturing process and makes it suitable for mass production.

[0015] In some embodiments, the cookware further includes an oily substance located in the groove above the titanium oxide layer, and the oily substance and the protrusions are arranged alternately to form the inner surface of the cookware.

[0016] In these embodiments, the oily substance located in the groove above the titanium oxide layer can form a uniform oil film. The combined effect of the oil film and the titanium oxide layer can further improve the non-stick properties of the cookware. The alternating arrangement of protrusions and oily substances on the inner surface of the cookware can enhance its aesthetics and further improve its non-stick properties. Attached Figure Description

[0017] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 This is a cross-sectional structural schematic diagram of a cooker according to an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 Enlarged structural diagram at point I;

[0020] Figure 3 This is a partial top view of a cooker according to an embodiment of the present invention.

[0021] Figure 4 This is a partial top view of a cooker according to another embodiment of the present invention;

[0022] Figure 5 This is a partial top view of a cooker according to another embodiment of the present invention.

[0023] Symbol Explanation

[0024] 10. Substrate; 11. Protrusion; 12. Groove;

[0025] 20. Titanium oxide layer; 30. Oily substances. Detailed Implementation

[0026] The following detailed descriptions are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be altered as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0027] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus and / or systems described herein, many of which will become clear upon understanding the disclosure of this utility model.

[0028] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0029] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0030] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "mounted to" another element, the element may be directly "on" another element, directly "connected to," or "mounted to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly mounted to" another element, no other elements may be present in between.

[0031] The terminology used herein is for describing various examples only and is not intended to limit the invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0032] The directional terms "upper," "lower," "inner," and "outer" used in this invention are all based on the orientation of the cookware when it is in normal use. This definition method will help ensure that readers or users can clearly understand the relative positional relationships of the various components and functions, and should not be construed as a limitation of this invention.

[0033] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0034] Furthermore, in the description of the examples, detailed descriptions of well-known related components or functions will be omitted when it is believed that such detailed descriptions would lead to a vague interpretation of the present invention.

[0035] The following will combine Figures 1 to 5 The following describes the cooking utensils provided in the embodiments of this utility model.

[0036] According to an embodiment of the present invention, a cooking utensil, specifically a pot, is provided, wherein, as... Figures 1 to 5 As shown, the cookware includes a substrate 10 and a titanium oxide layer 20. At least the bottom wall surface of the substrate 10 has an uneven structure. As an example, the uneven structure includes a plurality of protrusions 11 extending from the inner surface of the substrate 10 and grooves 12 located between adjacent protrusions 11, or the uneven structure includes a plurality of grooves 12 and protrusions 11 located between adjacent grooves 12. The titanium oxide layer 20 is formed in the grooves 12 of the uneven structure and is at a predetermined distance from the opening of the groove 12.

[0037] According to the cookware provided by this utility model, the titanium oxide layer 20 has better non-stick properties than metal materials. It is set in the groove 12 of the concave-convex structure, slightly lower than the groove opening of the groove 12 and maintaining a certain preset distance. In this way, during the use of the cookware, the surface of the titanium oxide layer 20 can come into contact with the food, and because it maintains a certain distance from the groove opening of the groove 12, it can prevent the titanium oxide layer 20 from being damaged by external forces, thereby enabling the cookware to have both initial non-stick and long-term non-stick properties.

[0038] In this embodiment, the substrate 10 has a receiving cavity, and an uneven structure is formed on the inner surface of the substrate 10. The specific location of the uneven structure on the inner surface of the substrate 10 can be selected based on actual needs. As some examples, the uneven structure can be formed on the inner bottom wall of the substrate 10, thus providing a non-stick effect for food during use. As other examples, the uneven structure can also be formed on the entire inner surface of the substrate 10, thereby improving the overall aesthetics and consistency of the cookware while ensuring food non-stick properties and simplifying the manufacturing process. Furthermore, it should be noted that when the cookware requires a non-stick outer wall surface, the uneven structure can also be formed on the outer wall surface of the cookware; this application does not impose further limitations on this.

[0039] In this embodiment, the titanium oxide layer 20 does not fill the entire groove 12; that is, it does not extend from the bottom of the groove to the edge of the groove 12, but is located at a specific depth inside the groove 12. It can be understood that the titanium oxide layer 20 is disposed in the groove 12, and there is a fixed interval of a "preset distance" between its upper surface and the groove 12. This application does not impose excessive limitations on the preset distance, because during use, the unfilled portion of the groove 12 will be covered by oily substances, thus not affecting the cookware's final, durable non-stick performance.

[0040] According to this application, the bottom area of ​​the groove 12 is filled with a titanium oxide layer 20, and the groove opening area of ​​the groove 12 can be filled with other non-stick materials. Here, the titanium oxide layer 20 provides good non-stick properties and also enhances the corrosion resistance and wear resistance of the cookware. The non-stick material can be an oil-based substance (edible oil or animal fat) or a non-stick coating (fluoropolymer coating or ceramic coating). Filling the groove opening area of ​​the groove 12 with non-stick material allows the groove opening area of ​​the groove 12 to store edible oil more effectively than a smooth surface. During cooking, the oil naturally accumulates in the groove, forming an oil film. Furthermore, due to the constraint of the sidewalls of the groove, the non-stick material is not easily lost and can stably adhere to the titanium oxide layer 20, preventing direct contact between food and cookware, thereby further improving the non-stick effect.

[0041] In this embodiment, when the non-stick material is an oil-based substance, the application of the non-stick material can be done during the use of the cookware or before the cookware leaves the factory; this application does not impose any restrictions on this. When the non-stick material is a non-stick coating (fluoropolymer coating or ceramic coating), the application of the non-stick material needs to be completed before the cookware leaves the factory to ensure that the cookware has a suitable appearance and improves the consumer's user experience.

[0042] In these embodiments, oily substances can fill the grooves 12 above the titanium oxide layer 20, thereby further optimizing non-stickiness.

[0043] According to this application, the protrusion 11 is made of metal materials such as stainless steel and titanium, and its surface can exhibit a bright and uniform luster under light, thereby enhancing the overall visual effect of the inner surface of the cookware. In some embodiments, the protrusion 11 is a metal protrusion, and the upper surface of multiple protrusions 11 serves as the inner surface of the cookware, specifically, as part of the inner surface of the cookware. In this way, the gloss of the inner surface of the cookware can be enhanced due to the metallic luster, ensuring the aesthetic appearance of the cookware, while also improving the durability of the cookware.

[0044] According to this application, the concave-convex structure is a structure with protrusions and grooves, and can be regular, irregular, continuous, discontinuous, etc.

[0045] like Figures 3 to 5 As shown, a top view schematic diagram of various cookware structures is illustrated, revealing various protrusions 11 and grooves 12. It should be noted that this application is not limited to this, and those skilled in the art can devise other similar protrusion structures based on the teachings of this application. It should be noted that the protrusion 11 can be a rib or a dot, and its specific form can be regular or irregular.

[0046] As an example, the protrusion 11 is at least one of annular, columnar, and conical, and / or the groove 12 is at least one of annular, columnar, and conical.

[0047] As an example, the cross-section of the protrusion 11 in the concave-convex structure can be a regular geometric shape. In some embodiments, the cross-sectional shape of the protrusion 11 is circular, triangular, quadrilateral or pentagonal.

[0048] In these embodiments, the shapes of the formed concave and convex structures are diverse, so that while ensuring that the groove 12 on which the titanium oxide layer 20 is formed can be enclosed, a certain degree of aesthetics can also be taken into account.

[0049] According to this application, multiple protrusions are distributed on the substrate 10 at predetermined intervals. As an example, adjacent protrusions 11 are connected to form a mesh structure, which enhances the visual effect and aesthetics of the cookware. In addition, such a dense distribution ensures that the spatula does not easily come into contact with every part of the titanium oxide layer during use.

[0050] In some embodiments, the height of the protrusion 11 is H1, wherein 80 micrometers ≤ H1 ≤ 200 micrometers; and / or the width of the protrusion 11 is W1, wherein 0.3 millimeters ≤ W1 ≤ 3 millimeters. If the height of the protrusion 11 is too high and the width is too large, the area ratio of the groove 12 will be relatively small, resulting in a smaller titanium oxide layer, which will affect the non-stick performance to some extent. If the height of the protrusion 11 is too low and the width is too small, the metallic luster brought by the exposed protrusion 11 will be weakened, affecting the appearance of the cookware. Furthermore, in the subsequent sanding step, because the protrusion is not obvious, it is easy to damage the titanium oxide layer 20 in the groove 12 during operation.

[0051] In some embodiments, the depth of the groove 12 is H2, wherein 80 micrometers ≤ H2 ≤ 200 micrometers; and / or the width of the groove 12 is W2, wherein 0.3 millimeters ≤ W2 ≤ 3 millimeters. If the width of the groove 12 is too large and the depth is too deep, food is easily stuck in the groove of the uneven structure and is difficult to clean; if the width of the groove 12 is too small and the depth is too shallow, plasma spraying can easily completely fill the groove or cover the entire surface of the uneven structure, making process control difficult, yielding a low pass rate, and increasing the difficulty of subsequent sanding.

[0052] According to this application, the concave-convex structure can be integrally formed with the substrate 10. In the corresponding method of manufacturing cookware, existing processes can be used to form an integrated structure between the concave-convex structure and the substrate 10. In this way, the concave-convex structure and the substrate 10 are tightly connected and not easily detached. As an example, the concave-convex structure integral with the substrate 10 can be formed on the original substrate by methods such as stamping, etching, or laser engraving. The manufacturing process of the cookware is simple and suitable for mass production. In addition, it should be noted that this application does not limit the concave-convex structure and the substrate 10 to be an integral structure. Those skilled in the art can form the concave-convex structure with the help of a pre-set mold under the guidance of this application, and then connect it to the substrate 10 in a suitable manner. In this way, more types of concave-convex structures can be set, and there is no need to worry about the manufacturing of the concave-convex structure causing damage to the substrate itself.

[0053] According to this application, the titanium oxide layer 20 is at a predetermined distance from the groove opening of the groove 12. For example, the distance between the upper surface of the titanium oxide layer 20 and the groove opening of the groove 12 is not less than 20 micrometers. Preferably, the distance between the upper surface of the titanium oxide layer 20 and the groove opening of the groove 12 is 20 micrometers to 50 micrometers. In this way, during the use of the cookware, the surface of the titanium oxide layer 20 can come into contact with the food, and because it maintains a certain distance from the groove opening of the groove 12, it can prevent the titanium oxide layer 20 from being directly damaged by external forces, thereby enabling the cookware to have both initial non-stick and long-lasting non-stick properties.

[0054] In the embodiments of this application, "groove 12" refers to the opening portion of a groove 12 opened on the surface of an object, which is opposite to the bottom of the groove 12 and located at the top of the groove 12.

[0055] In some embodiments, the thickness of the titanium oxide layer 20 is d1, wherein 20 micrometers ≤ d1 ≤ 50 micrometers. If the thickness of the titanium oxide layer 20 is too thin, it is difficult to control the uniformity of the titanium oxide layer 20 during the preparation process, resulting in local missed spraying or uneven thickness, which affects the appearance of the cookware and reduces its non-stick effect. If the thickness of the titanium oxide layer 20 is too thick, it will cover too many protrusions 11, and may even fill the grooves 12, which may prevent the desired cookware structure from being obtained, and will also increase the difficulty of the subsequent sanding step.

[0056] In some embodiments, the titanium dioxide layer 20 is formed of black titanium dioxide particles. Black titanium dioxide has an amorphous structure, exhibiting good non-stick properties and stable characteristics. This provides better non-stick properties for cookware and prevents discoloration due to high temperatures or chemical reactions during use. Furthermore, the black titanium dioxide has a black appearance, offering a different visual effect and ensuring the cookware's aesthetics, thus mitigating the impact of discoloration on user experience during use.

[0057] In some embodiments, the titanium oxide layer 20 is a plasma layer, which is relatively dense and uniform, and can improve the corrosion resistance of cookware.

[0058] In some embodiments, the particle size of the black titanium dioxide particles is 15-45 micrometers. If the black titanium dioxide particles are too coarse, the resulting coating will be rough with poor gloss, affecting the appearance. If the black titanium dioxide particles are too fine, the plasma deposition efficiency will be low, and over-melted particles will easily be generated, affecting the yield. A particle size of 15-45 micrometers for the black titanium dioxide particles can balance multiple aspects such as the gloss, appearance, and plasma deposition efficiency of the titanium dioxide layer.

[0059] In some embodiments, the volume fraction of the amorphous phase in the titanium oxide layer 20 is 30%-55%, and materials with such a volume fraction of amorphous phase can optimize the properties of the titanium oxide layer 20 in various aspects such as non-stickiness and corrosion resistance.

[0060] In some embodiments, the ratio of the projected areas of the protrusions 11 and the grooves 12 on the surface of the substrate 10 is (2-3):(7-8). This means that the grooves 12 occupy a relatively large area on the surface of the substrate 10, ensuring that the titanium oxide layer 20 filled in the grooves 12 has sufficient thickness and uniformity, thereby fully utilizing its non-stick effect. Furthermore, with this distribution, the protrusions 11 are also densely distributed, providing good physical protection for the titanium oxide layer 20 in the grooves 12. The protrusions 11 have high hardness and wear resistance, resisting scratches and abrasions during cooking (e.g., resisting the scraping of the titanium oxide in the recesses by a spatula during use), thus extending the lifespan of the cookware.

[0061] In these embodiments, by rationally controlling the area ratio of the protrusions 11 and the grooves 12, the distribution of the titanium oxide layer 20 on the cookware surface can be optimized. This distribution ensures both sufficient non-stick area and provides the necessary protective structure, enabling the cookware to maintain excellent non-stick performance during prolonged use.

[0062] In some embodiments, the substrate 10 is a titanium substrate, a stainless steel substrate, or a composite substrate. Here, the titanium substrate and the stainless steel substrate can be respectively formed by stretching the corresponding metal materials to create a basic structure with a receiving cavity. The composite substrate can be formed by combining two or more metal plates with millimeter-level thicknesses of different properties to create a basic structure with a receiving cavity. Thus, the cookware according to this application is suitable for a variety of substrate types, allowing for selective application based on manufacturing needs to produce cookware with the desired performance.

[0063] In some embodiments, the cookware further includes an oil substance 30 located in a groove 12 above the titanium oxide layer 20, and the oil substance 30 and protrusions 11 are arranged alternately to form the inner surface of the cookware.

[0064] In these embodiments, the oil substance 30 located in the groove 12 above the titanium oxide layer 20 can form a uniform oil film. The combined effect of the oil film and the titanium oxide layer can further improve the non-stick properties of the cookware. The protrusions 11 and the oil substance 30 are arranged alternately on the inner surface of the cookware, which can enhance the aesthetics of the cookware and further improve the non-stick properties.

[0065] According to this application, a method for manufacturing a cooker is provided, wherein the method for manufacturing the cooker includes:

[0066] Step S101: Provide a substrate 10 with an uneven structure on its inner surface, wherein the uneven structure includes a plurality of protrusions 11 protruding from the inner surface of the substrate 10 and a groove 12 formed by adjacent protrusions 11.

[0067] Step S102: Spray titanium oxide to form a titanium oxide layer 20 only in the bottom region of the groove 12 of the uneven structure on the substrate 10.

[0068] According to the manufacturing method of the cookware of this application, the titanium oxide layer 20 has better non-stick properties than metal materials. It is disposed in the groove 12 of the concave-convex structure, slightly lower than the groove opening of the groove 12 and maintaining a certain preset distance. In this way, during the use of the cookware, the surface of the titanium oxide layer 20 can come into contact with the food, and because it maintains a certain distance from the groove opening of the groove 12, it can prevent the titanium oxide layer 20 from being directly damaged by the external environment, thereby enabling the cookware to have both initial non-stick and long-lasting non-stick properties.

[0069] The method for manufacturing a cooker according to this application will be described below with reference to specific embodiments.

[0070] Provide matrix

[0071] According to this application, the substrate has a basic structure comprising a receiving cavity, formed by stretching or spinning a metallic material. As an example, the metallic material can be titanium, stainless steel, or a composite material.

[0072] In some embodiments, the thickness of the substrate is 1.2 mm to 2.0 mm, which can reduce the weight of the final manufactured cookware.

[0073] In some embodiments, the surface of the substrate has a rough structure of 3 μm-6 μm. For example, the substrate is sanded to create a rough structure with a surface roughness of 3 μm-6 μm. This roughness enhances the adhesion between the titanium oxide layer 20 and the substrate.

[0074] According to this application, the substrate 10 is a titanium substrate, a stainless steel substrate, or a composite substrate. The applicable substrate types are diverse, and a preference can be made according to manufacturing needs to prepare cookware with the required performance.

[0075] According to the cooking method of this application, the uneven structure on the inner surface of the substrate can be prepared by etching, laser engraving, stamping, etc. For example, a 5000T stamping machine is used to stamp one side of a circular sheet to obtain an uneven structure of a preset size.

[0076] In some embodiments, the height of the protrusion 11 is H1, wherein 80 micrometers ≤ H1 ≤ 200 micrometers; and / or the width of the protrusion 11 is W1, wherein 0.3 millimeters ≤ W1 ≤ 3 millimeters. If the height of the protrusion 11 is too high and the width is too large, the area ratio of the groove 12 will be relatively small, resulting in a smaller titanium oxide layer, which will affect the non-stick performance to some extent. If the height of the protrusion 11 is too low and the width is too small, the metallic luster brought by the exposed protrusion 11 will be weakened, affecting the appearance of the cookware. Furthermore, in the subsequent sanding step, because the protrusion is not obvious, it is easy to damage the titanium oxide layer 20 in the groove 12 during operation.

[0077] In some embodiments, the depth of the groove 12 is H2, wherein 80 micrometers ≤ H2 ≤ 200 micrometers; and / or the width of the groove 12 is W2, wherein 0.3 millimeters ≤ W2 ≤ 3 millimeters. If the width of the groove 12 is too large and the depth is too deep, food is easily stuck in the groove of the uneven structure and is difficult to clean; if the width of the groove 12 is too small and the depth is too shallow, plasma spraying can easily completely fill the groove or cover the entire surface of the uneven structure, making process control difficult, yielding a low pass rate, and increasing the difficulty of subsequent sanding.

[0078] Sprayed titanium oxide layer

[0079] According to this application, titanium oxide particles are sprayed onto the uneven structure, and the titanium oxide particles located on the surface of the protrusion 11 are sanded to form a titanium oxide layer 20 only in the bottom region of the groove 12 of the uneven structure on the substrate 10. Here, the titanium oxide layer 20 is formed in the groove 12 and is slightly lower than the opening of the groove 12.

[0080] According to this application, titanium oxide particles can be sprayed onto the surface of a substrate 10 with an uneven structure using thermal spraying. The spraying method of this application will be briefly described below using plasma spraying as an example.

[0081] According to the cooking utensil manufacturing method of this application, titanium oxide particles can be sprayed onto the uneven structure through the following steps:

[0082] Step S101: Place the outer surface of the substrate 10 in an environment of circulating cooling gas, and control the temperature of the cooling gas between -20°C and -10°C.

[0083] In step S102, titanium oxide particles of 15-45 micrometers are loaded into the powder feeder. The high-pressure plasma flame formed at the nozzle heats the titanium oxide particles to melt, and then cools them at a cooling rate of 180K / s-200K / s and rapidly deposits them on the inner surface of the substrate 10 to form titanium oxide particles.

[0084] As an example, spraying parameters may include a current of 450A-550A; a voltage of 50V-85V; a main gas (argon) flow rate of 1000L / h-1500L / h; a hydrogen flow rate of 80L / h-150L / h; a powder feeding gas flow rate of 35L / h-50L / h; a powder feeding rate of 25g / min-35g / min; a spraying distance (distance between the nozzle and the workpiece) of 140mm-160mm; a spraying angle of 45°-80°; and a workpiece temperature of 15℃-25℃.

[0085] According to this application, titanium oxide particles located on protrusion 11 are removed to obtain a cookware with a titanium oxide layer according to this application.

[0086] Specifically, the inner surface of the substrate 10 is sanded to remove the titanium oxide particles on the protrusion 11, so that the surface of the protrusion 11 is exposed and becomes part of the inner surface of the cookware. Compared with the existing flame-patterned cookware, the inner surface of the obtained cookware can have a certain metallic luster, which improves the overall aesthetics of the cookware.

[0087] In some embodiments, the thickness of the titanium oxide layer is less than the height of the groove 12, and the thickness of the titanium oxide layer 20 is d1, wherein 20 micrometers ≤ d1 ≤ 50 micrometers. If the thickness of the titanium oxide layer 20 is too thin, it is difficult to control the uniformity of the titanium oxide layer 20 during the preparation process, resulting in localized missed spraying or uneven thickness, affecting the appearance of the cookware and reducing its non-stick effect. If the thickness of the titanium oxide layer 20 is too thick, it will cover too many protrusions 11, and may even fill the groove 12, which may prevent the desired cookware structure from being obtained, and will also increase the difficulty of the subsequent sanding step.

[0088] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. However, it should be understood that, in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A cooking utensil, characterized in that, The cooking utensils include: The substrate (10) has a concave-convex structure on at least the bottom wall surface, wherein the concave-convex structure includes a plurality of protrusions (11) and grooves (12) located between adjacent protrusions (11), or the concave-convex structure includes a plurality of grooves (12) and protrusions (11) located between adjacent grooves (12). A titanium oxide layer (20) is formed in the groove (12) of the uneven structure and is at a predetermined distance from the opening of the groove (12).

2. The cookware according to claim 1, characterized in that, The height of the protrusion (11) is H1, wherein 80 micrometers ≤ H1 ≤ 200 micrometers; and / or the width of the protrusion (11) is W1, wherein 0.3 millimeters ≤ W1 ≤ 3 millimeters; and / or the depth of the groove (12) is H2, wherein 80 micrometers ≤ H2 ≤ 200 micrometers; and / or the width of the groove (12) is W2, wherein 0.3 millimeters ≤ W2 ≤ 3 millimeters.

3. The cookware according to claim 1, characterized in that, The protrusion (11) is a metal protrusion, and the upper surface of the plurality of protrusions (11) constitutes part of the inner surface of the cookware.

4. The cookware according to claim 1, characterized in that, The distance between the upper surface of the titanium oxide layer (20) and the opening of the groove (12) is not less than 20 micrometers.

5. The cookware according to claim 4, characterized in that, The thickness of the titanium oxide layer (20) is d1, wherein 20 micrometers ≤ d1 ≤ 50 micrometers.

6. The cookware according to claim 1, characterized in that, The titanium oxide layer (20) is formed of black titanium dioxide particles; and / or, the titanium oxide layer (20) is a plasma layer; and / or, the particle size of the black titanium dioxide particles is 15 micrometers to 45 micrometers; and / or, the volume percentage of the amorphous phase in the titanium oxide layer (20) is 30% to 55%.

7. The cookware according to claim 1, characterized in that, The ratio of the projected areas of the protrusion (11) and the groove (12) on the surface of the substrate (10) is (2-3):(7-8).

8. The cookware according to claim 1, characterized in that, The protrusion (11) is at least one of annular, columnar, and conical shapes; and / or, The groove (12) is at least one of annular, columnar and conical.

9. The cookware according to claim 1, characterized in that, The substrate (10) is a titanium substrate, a stainless steel substrate, or a composite substrate; and / or, the substrate is formed by stamping, etching, or laser engraving to form a substrate (10) having the concave-convex structure; and / or, the substrate (10) has a receiving cavity, and the concave-convex structure is formed on the inner surface of the substrate (10).

10. The cookware according to any one of claims 1 to 9, characterized in that, The cookware also includes an oily substance (30) located in the groove (12) above the titanium oxide layer (20), and the oily substance (30) and the protrusions (11) are arranged alternately to form the inner surface of the cookware.

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