Granular film layer non-stick pan

Abstract

The utility model discloses a particle film layer non-stick pan. Micro-nano concave-convex structures are uniformly distributed on the surface of a pan body; the micro-nano concave-convex structure comprises micro-nano bulges, the micro-nano bulges are particle films formed by particles, the thickness of the particle films is 0.1-0.98 mu m, and the particle size of the formed particle films is 0.02-0.3 mu m; the pot body is also provided with uniformly distributed concave holes; the diameter of the concave holes is 0.1-0.8 mm, the distance between the edges of the concave holes is 0.1-2 mm, the depth of the concave holes is 0.01-0.3 mm, the area of the concave holes accounts for 15-40% of the area of the whole pan body, and the concave holes are round or polygonal; and the concave hole is gradually recessed from the plane.

Description

Technical Field

[0001] This utility model relates to the preparation of a cooking utensil, namely a pot, and more particularly to a non-stick pot with a granular film layer. Background Technology

[0002] Existing non-stick pans with honeycomb mesh structures have relatively large honeycomb holes, with a diameter of over 3 millimeters. The bottom surface of the honeycomb holes is also coated with a coating, and the coating area is generally quite large, reaching about 80-90% of the substrate surface area. Therefore, the contact area between the coating and the food is also large, resulting in a larger friction surface and limiting the use of spatulas.

[0003] Existing technologies also include cookware with nanoscale pores. These nanoscale pores absorb air and grease during actual use, generating hot air and oil mist during heating, while simultaneously lifting the food. Combined with the aforementioned velvety effect achieved by the protruding structure, this reduces friction between the food and the inner surface of the cookware, achieving a non-stick effect through physical means without adding a chemical coating, making food preparation healthier for consumers. If the cookware body is made of titanium, a hardened titanium dioxide layer with a Vickers hardness of at least HV600 will be formed on its surface after micro-arc oxidation; if the cookware body is made of aluminum alloy, a hardened aluminum oxide layer with a Vickers hardness of at least HV1000 will be formed on its surface after micro-arc oxidation. The cookware body can be made of aluminum, titanium, or magnesium; the surface of the cookware with etched or stamped shallow pits is aluminum, magnesium, or titanium. However, this material offers no advantages in application.

[0004] The applicant requests a non-stick pan, comprising an uncoated pan body (1 mm or thicker), and a metal pan body (1 mm or thicker) with uniformly distributed recesses on the food-contact surface of the pan body; the diameter of the recesses is 0.1–0.5 mm, particularly 0.3–0.5 mm, the distance between the edges of the recesses is 0.3–2 mm, the depth of the recesses is 0.1–0.3 mm, particularly 0.1–0.15 mm, and the area of ​​the recesses accounts for 15–40% of the total area of ​​the pan body; the recesses are circular or polygonal; the recesses are gradually recessed from a flat surface. The metal used is iron, stainless steel, etc.

[0005] Existing cookware has an anti-stick structure on its inner wall, consisting of periodically distributed protrusions and / or pits. The size of these protrusions and pits ranges from a few micrometers to tens of micrometers, but this size is too small. These existing technologies cannot effectively achieve both non-toxicity and non-stick properties. Simply applying a physical non-stick layer to the cookware surface is insufficient for long-term non-stick performance because the spatula repeatedly rubs against the surface during cooking, causing wear and tear on the non-stick layer over time, thus compromising the long-lasting non-stick effect. This problem urgently needs to be solved.

[0006] CN2024101740492 A non-stick pan and its preparation method are the prior art of the applicant. The pan body has a concave structure and adopts a plasma carburizing process. The carburizing temperature of stainless steel, titanium or iron is usually required to be 350-900℃. The volume ratio of argon and carbon source gas, and argon and methane gas is 50-95%:50-5%. The processing time is 2-10 hours or more.

[0007] However, the non-stick properties of the pot body not only require macroscopic concave holes (pore diameter of 1 mm or larger), but also nanoscale micro-pores. How to process micro-pores is a problem, and existing technologies have not provided a clear answer.

[0008] Magnetron sputtering coating involves filling a vacuum chamber with argon gas and applying a negative bias voltage to the magnetron sputtering target. Argon ions bombard the target surface under the influence of an electric field. As the sputtered film atoms migrate towards the workpiece, some are ionized and accelerated under the negative bias voltage of the substrate, ultimately depositing a film on the workpiece. Cathodic arc ion plating and multi-arc ion plating are also common surface treatment technologies. They utilize a high-temperature, high-energy ion beam generated by an electric arc discharge to deposit metal ions onto the workpiece surface, thereby altering the workpiece's physical and chemical properties. Multi-arc ion plating, also known as the multi-arc method, is based on the cold cathode discharge theory. Under vacuum conditions, gas discharge evaporates and ionizes the target material to form plasma, which is then deposited onto the substrate surface to form a film.

[0009] Forming a dense metal coating is not what this invention advocates. Multi-arc ion plating can also produce a particulate film coating with tiny particles on the surface, called "microdroplets". Current methods require further processing, while this invention uses this particulate film to form a direct pot surface layer. Utility Model Content

[0010] To address the aforementioned problems, the purpose of this invention is to provide a non-stick pan with a granular film layer, particularly a low-cost pressed non-stick pan.

[0011] To achieve the above objectives, the technical solution of this utility model is a non-stick pan with a granular film layer, wherein micro-nano protrusions are uniformly distributed on the surface of the pan body, the micro-nano protrusions are granular films formed by particles, the thickness of the granular film is 0.1-0.98μm, and the particle size forming the granular film is 0.02-0.3μm.

[0012] The pot body is also provided with evenly distributed recessed holes; the diameter of the recessed holes is 0.1-0.8 mm, the distance between the hole edges is 0.1-2 mm, the hole depth is 0.01-0.3 mm, and the area of ​​the holes accounts for 15-40% of the total area of ​​the pot body. The recessed holes are circular or polygonal; the recessed holes are gradually recessed from the plane. The diameter of the recessed holes is particularly 0.3-0.5 mm.

[0013] The surface of the pot that comes into contact with food has evenly distributed recesses of two different diameters; the first type of recess has a diameter of 0.3-0.8 mm, and the second type of recess has a diameter of 0.05-0.29 mm; the center-to-center distance between the first type of recesses is 0.6-8 mm, and the center-to-center distance between the second type of recesses is 0.1-0.9 mm; the hole depth is 0.01-0.3 mm.

[0014] The pot body can be made of stainless steel, titanium or iron, and the surface of the pot body that comes into contact with the food is also provided with evenly distributed composite multi-sized concave holes.

[0015] The micro / nano bumps employ a particle film coating structure; the particle diameter forming the particle film is preferably achieved using multi-arc ion plating. When the micro / nano bumps employ a particle film coating, the diameter of the micro / nano particles forming the micro / nano particle film is 20-300 nm. A smooth film structure without particles is not required by this invention.

[0016] Beneficial effects: The micro-nano surface treated by this invention has good hardness and toughness. The oil and liquid retained on the surface micro-nano structure evaporate when heated, lifting the food to be heated. The uneven metal particles have good non-stick properties and good adhesion to the pot surface using methods such as ion plating. The micro-nano structure can improve the slipperiness of the inner surface of the pot, reduce the friction between the food and the inner surface of the pot, and make flipping and stirring (using a spatula with a certain hardness) smoother. The non-stick effect is basically at the level of the new PTFE Teflon coating application. The manufacturing cost is low. By superimposing one or two types of concave holes at the millimeter or micrometer level with uniform spacing, when frying or stir-frying general non-flour-based foods, the distribution of the concave holes makes it easier for the gas evaporated when the food is heated to expand, resulting in better physical non-stick function (better effect when the pot or spatula moves). The area of ​​the concave holes accounts for 15% to 40% of the pot body area. These features and advantages of this invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram showing the distribution of concave holes in the pot body according to an embodiment of this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the present invention. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same objects throughout.

[0021] The micro-nano protrusions on the pot surface will adopt a granular film structure, with the particles deposited onto the pot body surface. In particular, multi-arc ion plating is used: by passing a large current through the arc target and igniting the arc with an arc-starting needle, an electric arc is generated on the target surface. The arc temperature is very high, melting the target material. By applying a bias voltage to the product, the melted target material is deposited on the product.

[0022] The thickness of the micro / nanoparticle film is 100-980 nm, especially 150-700 nm. The diameter of the micro / nanoparticles forming the film is 20-300 nm. A multi-arc ion plating method is preferred: by passing a large current to the arc target and igniting the arc with an arc-starting needle, an electric arc is generated on the target surface. The arc temperature is very high, melting the target material. By applying a bias voltage to the product, the melted target material is deposited on the product. In the example, the target material easily produces particles with a diameter of about 100 nm, which form a film on the surface of the material being plated. Particles with a diameter of about 100 nm are the main distribution, while larger particles can reach more than 200 nm, which is related to the target material, current magnitude, temperature, atmosphere control, etc.

[0023] The layer on the pot body that comes into contact with food is made of iron, stainless steel, etc., and the back of the stainless steel can be laminated with an aluminum layer.

[0024] Figure 1 , 2 The surface of the pot body has millimeter-level recessed holes 1; this embodiment relates to a non-stick pot, and it is preferable that the recessed holes are evenly distributed and of consistent depth. The distribution of the recessed holes can also be such that the bottom of the pot is more densely distributed than the edge of the pot; the area between two adjacent recessed holes is a flat surface of the pot body 1. The black dots are micro-nano convex (protruding) particle film 4 structures.

[0025] The surface of the pot that contacts food can also be provided with uniformly distributed concave holes of one, two, or more millimeter-sized diameters; the first type of concave hole 3 has a diameter of 0.3-0.8 mm, especially 0.3-0.5 mm. The second type of concave hole 2 has a diameter of 0.05-0.29 mm; the center-to-center distance between the first type of concave holes is 0.6-8 mm, and the center-to-center distance between the second type of concave holes is 0.1-0.9 mm; the depth of the concave holes is 0.05-0.3 mm. The area of ​​the two types of concave holes accounts for 15-40% of the total area of ​​the pot body. The concave holes are circular or polygonal; the concave holes are gradually recessed from a flat surface. The total area of ​​the concave holes accounts for 15%-40% of the total area: for example, 15%, 20%, 35%, and 40% are all embodiments of this utility model. This ensures both the physical non-stick properties of the entire non-stick pot and its service life.

[0026] The layer on the pot body that comes into contact with food is made of materials such as iron, titanium, or stainless steel, such as titanium or stainless steel with an aluminum composite layer on the back.

[0027] The roughness of a metal surface affects its non-stick properties, and surface modification can be performed to improve these properties.

[0028] First, micro-nano processing is performed on the metal surface. Then, further processing is performed to form a multi-sized micro-nano structure with concave and convex features on the metal surface. After the two-step processing, the non-stick performance of the pot surface is improved, reaching the first-class standard according to the national standard for non-stick cookware GB / T32095.2-2015.

[0029] The method for preparing the uncoated pressed non-stick pan of this application involves creating millimeter-level concave holes by pressing a titanium plate-shaped pan body using a press with a uniformly rounded protrusion (matching the size of the pan body and the concave shape of the pan's interior) through an alloy mold. The uncoated pressed non-stick pan is prepared by forming a concave pan body from austenitic or martensitic titanium plate.

[0030] Even when stir-fried at high temperatures or when the pan is heated dry, the uncoated non-stick pan does not release any toxic substances or gases, and will not contaminate the food being cooked or the kitchen environment, making cooking safer.

[0031] Surface micro-nano processing enables the formation of composite multi-size micro-nano structures on metal surfaces. Based on the above micro-nano processing of metal surfaces, concave holes are then prepared.

[0032] The diameter of the recesses is 200, 300, 400, or 500 micrometers, and the surface width between the recesses is 100 to 400 micrometers. The recesses are formed by pressing or etching with a mold made of hard alloy using a pressure device, resulting in a hardened layer structure for both the recesses and the pot body. The center-to-center distance between the recesses is 0.6 to 2 mm, and the distance between the edges of adjacent recesses is controlled between 0.3 and 1.8 mm. The depth of the recesses is 0.05 to 0.18 mm.

[0033] The concave hole is circular or polygonal, and a polygonal concave hole corresponds to a uniform polygonal protrusion prepared on the mold; the concave hole is formed by a gradual downward concavity from a plane.

[0034] The pot body is concave in shape, formed by pressing a flat plate using a hydraulic press. A handle can be welded onto the pot body.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A non-stick pan with a particulate film layer, characterized in that, The surface of the pot body is uniformly distributed with micro- and nano-protrusions, which are particulate films formed by particles. The thickness of the particulate film is 0.1-0.98µm, and the particle size forming the particulate film is 0.02-0.3µm.

2. The non-stick pan with particulate film layer according to claim 1, characterized in that, The pot body is also provided with evenly distributed concave holes; the diameter of the concave holes is 0.1~0.8mm, the distance between the edge of the holes is 0.1~2mm, the depth of the holes is 0.01-0.3mm, and the area of ​​the holes accounts for 15-40% of the total area of ​​the pot body. The concave holes are circular or polygonal; the concave holes are gradually recessed from the plane.

3. The non-stick pan with particulate film layer according to claim 2, characterized in that, The diameter of the concave hole is 0.3~0.5mm.

4. The non-stick pan with particulate film layer according to claim 2, characterized in that, The pot body has two types of recessed holes evenly distributed on the surface that contacts the food; the first type of recessed hole has a diameter of 0.3-0.8mm, and the second type of recessed hole has a diameter of 0.05-0.29mm; the distance between the centers of the first type of recessed holes is 0.6-8mm, and the distance between the centers of the second type of recessed holes is 0.1-0.9mm; the hole depth is 0.01-0.3mm.

Images