Nonstick pan and manufacturing method therefor

Abstract

A nonstick pan and a manufacturing method therefor. The nonstick pan comprises a pan body. Protrusions are provided on the inner surface of the pan body, the protrusions including a central protrusion and distributed protrusions. The central protrusion is arranged at the center of the inner surface of the pan body. Protrusion circles centered on the central protrusion are arranged radially outward from the central protrusion, each protrusion circle consists of a plurality of distributed protrusions separated from each other, and the height of the central protrusion and each distributed protrusion is H. Recesses of the inner surface of the pan body are formed between the central protrusion and the distributed protrusions and among the distributed protrusions, and a nonstick layer is arranged on the recesses of the inner surface of the pan body. The manufacturing method for the nonstick pan comprises the following steps: S1: preparing a metal sheet, and machining a central protrusion and protrusion circles on the surface of the metal sheet; S2: forming the sheet into a pan body; S3: sandblasting the pan body to remove edges and corners of the central protrusion and distributed protrusions; S4: spraying a nonstick coating on the inner surface of the pan body; and S5: removing the nonstick coating on the surfaces of the protrusions.

Description

Non-stick pan and preparation method thereof Technical Field

[0001] The invention relates to a non-stick pan and a preparation method thereof. Background Art

[0002] The principle of non-stick pan is to use a non-stick coating on the inner surface of the pan. The most common and best non-stick coatings are Teflon coating and ceramic coating.

[0003] However, the non-stick coating is prone to peeling under external forces. To address this technical problem, US20150157160A1 discloses a cooking container and a manufacturing method thereof. The cooking container has multiple concave and convex portions, with the convex portions protruding from the bottom surface of the cooking container in a dotted line shape, thereby maximizing the non-stick effect and preventing food from sticking to the bottom surface of the cooking container. A non-stick coating liquid is applied to the surface of a stainless steel plate to form a coating on the concave and convex portions, and the coating on the convex portions is removed. The convex portions then provide protection, preventing the coating from peeling under external forces. Technical issues

[0004] Another disadvantage of US20150157160A1 is that the protrusions on the bottom surface of the cooking container are arranged in a regular hexagonal pattern to form a honeycomb pattern. Therefore, the non-stick coating in the hexagonal area is still exposed and is easily affected by external forces, causing peeling. To solve this problem, the area enclosed by the hexagon should be as small as possible. If the area enclosed by the hexagon is reduced, another problem will arise: the protrusions will occupy most of the area of ​​the inner surface of the cooking container, resulting in a significant reduction in the area occupied by the non-stick coating. Moreover, the overly dense protrusions are equivalent to solid lines or blocks to a certain extent. When cooking food, more food will adhere to the protrusions without the non-stick layer. When the non-stick coating area is significantly reduced and more food adheres to the protrusions, the non-stick effect of the non-stick pan will be greatly reduced.

[0005] In order to overcome the above-mentioned deficiencies of the existing non-stick pans, the present invention provides a non-stick pan which can ensure the non-stick effect of the non-stick pan and reduce the external force acting on the non-stick layer. Technical Solutions

[0006] The technical solution of the present invention to solve the technical problem is: a non-stick pan, comprising a pan body, wherein convex points are provided on the inner surface of the pan body, and the distribution of the convex points is as follows:

[0007] The convex points include central convex points and sub-convex points;

[0008] The center of the inner surface of the pot body has the central convex point;

[0009] A convex dot circle is provided around the central convex dot from the inside out with the central convex dot as the center. The convex dot circle is composed of a plurality of separate sub-convex dots. The central convex dot and each sub-convex dot have the same convex height, which is H.

[0010] A concave portion on the inner surface of the pot body is formed between the central convex point and the sub-convex points, and between the sub-convex points. The concave portion on the inner surface of the pot body is provided with a non-stick layer, while the central convex point and the sub-convex points do not have a non-stick layer.

[0011] Furthermore, the surface of the protrusion has no sharp corners.

[0012] Furthermore, the surface of the protrusion is arc-shaped.

[0013] Furthermore, the width of the protrusion is preferably 0.2-1 mm, more preferably 0.3-0.5 mm.

[0014] Furthermore, the convex dot circle is circular; the gap distance between the convex dot circle closest to the central convex dot and the central convex dot is L1; the gap distances between adjacent convex dot circles are equal, and the gap distance is L2; ​​the gap distances between the sub-convex dots in each convex dot circle are equal, and the gap distance is L3; wherein, H=0.05-0.2mm (more preferably 0.05-0.1mm), L1=0.5-2.5mm (more preferably 1-1.5mm), L2=0.5-2.5mm (more preferably 1-1.5mm), L3=0.5-2.5mm (more preferably 1-1.5mm).

[0015] Alternatively, the dot circle is a regular polygon; the gap distance between the edge of the dot circle closest to the central dot and the central dot is L1; the gap distances between the edges of adjacent dot circles are equal, and the gap distance is L2; ​​the gap distances between the sub-dots in each dot circle are equal, and the gap distance is L3; wherein, H=0.05-0.2mm (more preferably 0.05-0.1mm), L1=0.5-2.5mm (more preferably 1-1.5mm), L2=0.5-2.5mm (more preferably 1-1.5mm), L3=0.5-2.5mm (more preferably 1-1.5mm).

[0016] A method for preparing the above-mentioned non-stick pan comprises the following steps:

[0017] S1: preparing a metal plate, and processing the central convex dot and the convex dot ring on the surface of the metal plate by laser engraving, machining, die stamping or etching;

[0018] S2: forming the plate into a pot body;

[0019] S3, sandblasting the pot body to remove the central convex point and the sharp corners of the sub-convex points;

[0020] S4: Spray non-stick coating on the inner surface of the pot;

[0021] S5: Remove the non-stick coating on the surface of the bumps.

[0022] Furthermore, in step S5, the non-stick coating on the surface of the bump is removed by grinding. Beneficial effects

[0023] The beneficial effects of the present invention are that the non-stick effect of the non-stick pan can be ensured and external forces acting on the non-stick layer can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a cross-sectional view of the present invention.

[0025] FIG2 is a partial enlarged view of portion A in FIG1 .

[0026] FIG3 is a planar arrangement diagram of the central convex point and the sub-convex points.

[0027] FIG. 4 is another planar arrangement diagram of the central convex dot and the sub-convex dot. Modes for Carrying Out the Invention

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] 1 to 4 , a non-stick pan includes a pan body 1 , wherein convex points are provided on the inner surface of the pan body 1 , and the distribution of the convex points is as follows:

[0030] The convex points include a central convex point 2 and sub-convex points 3.

[0031] The inner surface of the pot body 1 has a central raised point 2 at its center. Surrounding this central raised point 2 is a raised circle, extending from the inside outward, centered on the central raised point 2. This raised circle is composed of a plurality of separate sub-raised points 3. The raised height of the central raised point 2 and each sub-raised point 3 is equal, and this raised height is H. A concave portion of the pot body's inner surface is formed between the central raised point 2 and the sub-raised points 3, and between the sub-raised points 3 and the sub-raised points 3. This concave portion of the pot body's inner surface is provided with a non-stick layer 4. The central raised point 2 and the sub-raised points 3 are not provided with a non-stick layer.

[0032] In the present invention, the convex points are arranged in a circular shape with the central convex point 2 as the center, which can ensure the non-stick effect of the non-stick pan and reduce the external force on the non-stick layer. The principle is:

[0033] The external force on the non-stick pan mainly comes from the spatula hitting the inner surface of the pan. However, no matter what angle the spatula is inserted into the pan, it is generally inserted in the radial direction of the pan. Since the protrusions spread outward in a circle, the protrusion circle naturally receives the radial impact of the spatula. The possibility of the spatula just hitting the concave part between the protrusion circles is extremely small. Therefore, the gap distance between the protrusion circles can be appropriately enlarged, which can also achieve the purpose of reducing the external force on the non-stick layer. By appropriately enlarging the gap distance between the protrusion circles, the area of ​​the non-stick layer in the concave part is not greatly affected, so that the effective cooking area of ​​the non-stick pan is not greatly affected by the provision of the protrusions. The larger area of ​​the non-stick coating also ensures the non-stick property of the non-stick pan.

[0034] At the same time, the gaps between the raised dots are appropriately enlarged so that the raised dots do not gather together. When cooking, the raised dots effectively support the food, while there is not much adhesion between the food and the raised dots. The gaps between the raised dots can also store oil appropriately, further ensuring the non-stick performance of the non-stick pan.

[0035] The surfaces of the protrusions (including the central protrusion 2 and the sub-protrusions 2) are preferably smooth to reduce the obstruction encountered by the spatula when inserting the pot, and also to reduce the force of the spatula on the protrusions, thereby preventing the protrusions from being scraped off. The surface of the protrusions is most preferably curved.

[0036] The width of the protrusions (including the central protrusion 2 and the sub-protrusions 2) is preferably 0.2-1 mm (more preferably 0.3-0.5 mm). "Protrusion width" here refers to the size of the protrusion, meaning the dimension at its widest point. If the protrusions are too large, food may easily stick to them. If they are too small, they may not be able to support food or protect the non-stick layer.

[0037] As a most preferred embodiment, the convex dot circle is circular; the closest gap distance between the convex dot circle closest to the central convex dot and the central convex dot 2 is L1; the gap distances between adjacent convex dot circles are equal, and the gap distance is L2; ​​the gap distances between the sub-convex dots 2 in each convex dot circle are equal, and the gap distance is L3; wherein, H = 0.05-0.2mm (more preferably 0.05-0.1mm), L1 = 0.5-2.5mm (more preferably 1-1.5mm), L2 = 0.5-2.5mm (more preferably 1-1.5mm), L3 = 0.5-2.5mm (more preferably 1-1.5mm).

[0038] As shown in Figure 3, when the convex circle is circular, L1 is the distance between the edge of the central convex point 2 and the inner circle of the convex circle closest to it; L2 is the distance between the outer circle of the convex circle of the inner circle and the inner circle of the convex circle of the outer circle; L3 is the gap distance between two adjacent convex points in the convex circle.

[0039] Of course, as shown in Figure 4, the convex dot circle can also be a regular polygon (a regular hexagon in Figure 4); the gap distance between the edge of the convex dot circle closest to the central convex dot and the central convex dot is L1; the gap distances between the edges of adjacent convex dot circles are equal, and the gap distance is L2; ​​the gap distances between the sub-convex dots in each convex dot circle are equal, and the gap distance is L3; wherein, H=0.05-0.2mm (more preferably 0.05-0.1mm), L1=0.5-2.5mm (more preferably 1-1.5mm), L2=0.5-2.5mm (more preferably 1-1.5mm), L3=0.5-2.5mm (more preferably 1-1.5mm).

[0040] As shown in Figure 4, when the convex circle is a regular polygon, L1 is the distance between the edge of the central convex point 2 and the edge of the sub-convex point of the convex circle closest to it; L2 is the closest gap distance between the sub-convex points of the inner circle convex circle and the sub-convex points of the outer circle convex circle; L3 is the gap distance between two adjacent convex points in the convex circle.

[0041] The value of H should be neither too large nor too small. If H is too large, the height of the protrusions will be too high, making it difficult for the non-stick layer to perform well and thus affecting the non-stick performance of the non-stick pan. If H is too small, the height of the protrusions will be too low, making it difficult to protect the non-stick layer, store oil in the protrusions, and support food. The values ​​of L1, L2, and L3 should be neither too large nor too small. If L1, L2, and L3 are too large, the protrusions will be too large, and a spatula will easily dig into the recesses, thus damaging the non-stick layer. If L1, L2, and L3 are too small, the protrusions will be too dense. When the non-stick coating area is significantly reduced and a large amount of food adheres to the protrusions, the non-stick effect of the non-stick pan will be greatly reduced. The above parameter settings are the parameters obtained by the applicant after extensive research work, and their purpose is to achieve the optimal effect, namely: to ensure that the inner surface of the pan body has a considerable area of ​​non-stick layer; to maximize the non-stick performance of the non-stick pan, while at the same time taking into account the non-stick coating in the recesses to reduce external forces.

[0042] The method for preparing the non-stick pan comprises the following steps:

[0043] S1: preparing a metal plate, and processing the central convex dot and the convex dot ring on the surface of the metal plate by laser engraving, machining, die stamping or etching;

[0044] S2: forming the plate into a pot body 1;

[0045] S3, sandblasting the pot body to remove the sharp corners of the central convex point 2 and the sub-convex points 3;

[0046] S4: spraying a non-stick coating 4 on the inner surface of the pot;

[0047] S5: removing the non-stick coating on the surface of the bump, for example, by grinding.

[0048] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0049] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A non-stick pan, comprising a pan body, wherein the inner surface of the pan body is provided with convex points, characterized in that: The distribution of the convex points is as follows: The convex points include central convex points and sub-convex points; The center of the inner surface of the pot body has the central convex point; Around the central convex point, there is a convex point circle with the central convex point as the center from the inside to the outside, the convex point circle is composed of a plurality of separate sub-convex points, the convex heights of the central convex point and each sub-convex point are equal, and the convex height is H; A concave portion on the inner surface of the pot body is formed between the central convex point and the sub-convex points, and between the sub-convex points. The concave portion on the inner surface of the pot body is provided with a non-stick layer, and the central convex point and the sub-convex point do not have a non-stick layer.

2. The non-stick pan according to claim 1, characterized in that: The surfaces of the protrusions have no edges or corners.

3. The non-stick pan according to claim 2, characterized in that: The surface of the convex point is arc-shaped.

4. The non-stick pan according to claim 1, characterized in that: The width of the protrusion is 0.2-1 mm.

5. The non-stick pan according to any one of claims 1 to 4, characterized in that: The convex dot circle is circular; The gap distance between the convex point circle closest to the central convex point and the central convex point is L1; The gap distances between adjacent convex dot circles are all equal, and the gap distance is L2; The gap distances between the sub-convex points in each convex point circle are equal, and the gap distance is L3; Among them, H=0.05-0.2mm, L1=0.5-2.5mm, L2=0.5-2.5mm, L3=0.5-2.5mm.

6. The non-stick pan according to any one of claims 1 to 4, characterized in that: The convex point circle is a regular polygon; The gap distance between the edge of the convex point circle closest to the central convex point and the central convex point is L1; The gap distances between the edges of adjacent convex dot circles are all equal, and the gap distance is L2; The gap distances between the sub-convex points in each convex point circle are equal, and the gap distance is L3; Among them, H=0.05-0.2mm, L1=0.5-2.5mm, L2=0.5-2.5mm, L3=0.5-2.5mm.

7. A method for preparing a non-stick pan as claimed in any one of claims 1 to 6, comprising the following steps: S1: preparing a metal plate, and processing the central convex point and the convex point ring on the surface of the metal plate by laser engraving, mechanical processing, mold stamping or etching; S2: forming the plate into a pot body; S3, sandblasting the pot body to remove the central convex point and the corners of the sub-convex points; S4: spraying a non-stick coating on the inner surface of the pot; S5: Remove the non-stick coating on the surface of the bumps.

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