Deep surface physical treatment zero-coating non-stick process
Through the deep physical processing process of forming a multi-layer rough structure on the surface of the inner liner of the rice cooker, the problem of sticking the rice cooker and coating falling off is solved, making it easy to clean and evenly transfer heat, improving the user experience.
Patent Information
- Application Number
- CN202510421268.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-07-04
AI Technical Summary
Existing rice cooking utensils are prone to stick to the pan during cooking, which leads to difficulty in cleaning, and the coating is easy to fall off at high temperatures, affecting health.
Deep surface physical treatment process, including multi-layered sandblasting and etching processes, forms a multi-layered rough structure on the surface of the rice cooker inner liner, and combines aluminum alloy and stainless steel materials to form a multi-layered rough structure to improve surface energy and heat transfer.
It realizes that rice is not easy to stick to the pan, is easy to clean, and is evenly transferred to heat, avoids coating shedding and health risks, and improves user experience.
Smart Images
Figure CN120244840A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of metal material processing, and specifically to a deep surface physical treatment 0 coating non-stick process. Background Art
[0002] During the process of cooking rice, the rice cooking utensils will have the phenomenon of sticking to the pan, which makes it difficult to clean the cooking utensils after meals and deteriorates the user experience. In the prior art, in order to achieve the effect of non-sticking rice, a non-stick coating is generally provided on the inner wall of the rice cooking utensils. However, the non-stick coating is prone to peeling off during long-term cooking, especially under high-temperature cooking and dry burning conditions. The non-stick coating is more likely to peel off, which affects its anti-sticking effect and also causes certain impacts on human health.
[0003] With the increasing demand of consumer users for healthy cooking, cooking utensils without coatings are attracting more and more attention, and setting a hydrophobic surface on the inner surface of rice cooking utensils is an important research direction.
[0004] In the prior art, generally, etching, polishing, wire drawing, passivation treatment and other methods are used on the inner surface of the rice cooker inner pot to reduce the contact surface between food and the inner pot, so as to achieve the effect of non-sticking food. However, the traditional etching patterns cannot further make the surface patterns finer, and it is difficult to further meet the requirements of users for non-sticking food. Summary of the Invention
[0005] The purpose of the present disclosure is to provide a deep surface physical treatment 0 coating non-stick process to solve the above problems.
[0006] To achieve the above purpose, the present disclosure provides the following technical solutions:
[0007] According to the first aspect of the embodiments of the present disclosure, a deep surface physical treatment 0 coating non-stick process is provided. The process includes a surface physical treatment process for the inner pot of the rice cooker, and is characterized in that the surface physical treatment process for the inner pot of the rice cooker includes the following steps:
[0008] Step 1: Provide the metal sheet required for the inner pot of the rice cooker;
[0009] Step 2: Subject the metal sheet to a first etching process to obtain a metal sheet with a first surface texture formed thereon;
[0010] Step 3: Subject the metal sheet with the first surface texture formed thereon to a stretching process and a bulging process to obtain a rough inner pot;
[0011] Step 4: Subject the inner surface of the rough inner pot to a second etching process to obtain a rough inner pot with a second surface texture formed thereon;
[0012] Step 5: Subject the inner surface of the rough inner pot with the second surface texture to a first sandblasting treatment to obtain the rough inner pot after the first sandblasting treatment;
[0013] Step 6: Subject the outer surface of the rough inner pot after the first sandblasting treatment to a second sandblasting treatment to obtain the rough inner pot after the second sandblasting treatment;
[0014] Step 7: Subject the rough inner pot after the sandblasting treatment to a post-treatment to obtain the inner pot of the rice cooker.
[0015] In one aspect of the embodiments of the present disclosure, the metal sheet includes a first metal layer serving as the outer surface of the inner pot and a second metal layer serving as the inner surface of the inner pot provided on one surface of the first metal layer; wherein, the material of the first metal layer is selected from aluminum or its alloy, and the material of the second metal layer is selected from 316L stainless steel.
[0016] In one aspect of the embodiments of the present disclosure, the first surface texture is a square or a rhombus; the second surface texture is a square or a rhombus.
[0017] In one aspect of the embodiments of the present disclosure, the first surface texture is a square or a rhombus; the second surface texture is a square or a rhombus.
[0018] In one aspect of the embodiments of the present disclosure, specifically, the first surface texture is a square; the second surface texture is a rhombus.
[0019] In one aspect of the embodiments of the present disclosure, in Step 5, the abrasive types used in the first sandblasting treatment are selected from (1) the single spraying treatment effect of a combination of glass sand with different mesh sizes, (2) the single spraying treatment effect of a combination of ceramic sand with different mesh sizes, and (3) the mixed sandblasting treatment effect of glass sand and ceramic sand with different mesh sizes.
[0020] In one aspect of the embodiments of the present disclosure, in Step 5, the abrasive types used in the first sandblasting treatment include the single treatment of 40-220 mesh glass sand, the single treatment of 100-450 mesh ceramic sand, and the combined treatment process of ceramic sand and glass sand.
[0021] In one aspect of the embodiments of the present disclosure, in Step 5, the abrasive types used in the first sandblasting treatment include 60 mesh glass sand, 80 mesh glass sand, and 205 mesh ceramic sand; wherein, the mass ratio of the 60 mesh glass sand, 80 mesh glass sand, and 205 mesh ceramic sand is selected from 1:1:1.
[0022] In one aspect of the embodiments of the present disclosure, in Step 5, in the first sandblasting treatment, the air source pressure is 15-35 MPa, the distance between the sandblasting nozzle and the inner pot is 3-5 cm, and the diameter of the sandblasting nozzle is 8-12 mm.
[0023] In one aspect of the embodiments of the present disclosure, in step 6, the abrasive types used in the second sandblasting treatment include glass sand with a mesh size of 60 - 220 and ceramic sand with a mesh size of 120 - 400.
[0024] In one aspect of the embodiments of the present disclosure, in step 6, in the second sandblasting treatment, the air source pressure is 1.5 - 3.5 MPa, the distance between the sandblasting gun nozzle and the inner liner is 3 - 5 cm, and the diameter of the sandblasting gun nozzle is 8 - 12 mm.
[0025] According to the second aspect of the embodiments of the present disclosure, there is provided an inner liner for an electric rice cooker, which is obtained by the foregoing physical treatment process for the surface of the inner liner of the electric rice cooker.
[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0027] Through the deep physical treatment technology involved in the present application, a multi-level rough structure is formed on the surface of the inner liner of the electric rice cooker, which better solves the problems of difficult cleaning of the etched lines on the inner liner of the electric rice cooker and sticking to the pot after long-term use; the deep physical sandblasting treatment involved in the present application can change the surface energy of the inner liner, achieving the purpose that the product is easy to clean or even does not need to be cleaned. In addition, through the deep physical treatment technology involved in the present application, local heating can be improved, and local heat transfer can be dispersed, achieving the purpose of uniform heating and the inner wall is not easily yellowed or burnt due to heating. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a partially enlarged schematic view of the surface structure of the inner liner after the deep physical sandblasting treatment provided by the present disclosure;
[0029] Figure 2 It is a partially enlarged schematic view of the surface structure of the inner liner and rice grains after the deep physical sandblasting treatment provided by the present disclosure;
[0030] Figure 3 It is a three-dimensional structure schematic view of a cooking utensil including the surface structure of the inner liner after the deep physical sandblasting treatment provided by the present disclosure;
[0031] Figure 4 It is a front cross-sectional structure schematic view of a cooking utensil including the surface structure of the inner liner after the deep physical sandblasting treatment provided by the present disclosure;
[0032] Figure 5 It is a photograph of a cooking utensil including the surface structure of the inner liner after the deep physical sandblasting treatment provided by the present disclosure before salt spray testing;
[0033] Figure 6The photograph after salt spray test of a cooking appliance including the surface structure of the inner container after the deep physical sandblasting treatment provided by the present disclosure;
[0034] In the figure: 1. Inner container body; 2. Bottom of the inner container; 3. Folded edge; 4. Outer wall of the inner container; 5. Inner wall of the inner container; 6. First heat transfer surface; 7. Heat deposition diffusion groove; 8. Heat transfer transition layer; 9. High-temperature deposition groove; 10. Heat transfer contact point; 11. Rhombic etching groove; 12. Capillary support end. Specific embodiments
[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.
[0037] For the sake of brevity, the present disclosure only specifically discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form a range not explicitly recorded; and any lower limit can be combined with other lower limits to form a range not explicitly recorded. Similarly, any upper limit can be combined with any other upper limit to form a range not explicitly recorded. In addition, each separately disclosed point or single numerical value itself can be used as a lower limit or an upper limit to be combined with any other point or single numerical value or with other lower limits or upper limits to form a range not explicitly recorded.
[0038] In the present disclosure, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.
[0039] In the description of the present disclosure, unless otherwise specified, "above" and "below" include the corresponding number.
[0040] Unless otherwise specified, the terms used in this disclosure have the well-known meanings commonly understood by those skilled in the art. Unless otherwise specified, the numerical values of the various parameters mentioned in this disclosure can be measured by various commonly used measurement methods in the art (for example, they can be tested according to the methods given in the embodiments of this disclosure).
[0041] The term "about" is used to describe and account for small variations. When used in conjunction with an event or circumstance, the term can refer to instances where the event or circumstance occurs precisely and instances where it occurs very nearly. For example, when used in conjunction with a numerical value, the term can refer to a range of variation of ±10% less than or equal to the numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. Additionally, sometimes in this disclosure, quantities, ratios, and other numerical values are presented in a range format. It should be understood that such range formats are for convenience and brevity and should be understood flexibly to include not only the numerical values explicitly specified as range limits but also all individual numerical values or sub-ranges subsumed within the said range as if each numerical value and sub-range were explicitly specified.
[0042] A list of items joined by the terms "at least one of", "at least one in", "at least one kind in", or other similar terms can mean any combination of the listed items. For example, if items A and B are listed, then the phrase "at least one of A and B" means only A; only B; or A and B. In another example, if items A, B, and C are listed, then the phrase "at least one of A, B, and C" means only A; or only B; only C; A and B (excluding C); A and C (excluding B); B and C (excluding A); or all of A, B, and C. Item A can include a single component or multiple components. Item B can include a single component or multiple components. Item C can include a single component or multiple components.
[0043] In this disclosure, the metal sheet used has a double-layer structure, with the outer layer being an aluminum alloy layer for heat conduction transfer and the inner layer being a stainless steel layer in contact with food.
[0044] In this disclosure, the metal sheet used has a double-layer structure, with the outer layer being an aluminum alloy layer for heat conduction transfer and the inner layer being a stainless steel layer in contact with food.
[0045] As Figures 1 to 4 shown, this application provides a surface structure of an inner container after deep physical sandblasting treatment and a cooking appliance including the inner container, which includes: an inner container body 1, a bottom of the inner container body 1 is provided with a bottom 2, and a folding edge 3 is provided outside the top of the inner container body 1;
[0046] Specifically, asFigure 3 and Figure 4 As shown in Figure 4 , the outer wall 4 of the inner container is disposed outside the inner container body 1, and the outer wall 4 of the inner container is integrally connected to the bottom 2 of the inner container.
[0047] A non-stick protection component is disposed inside the inner container body 1, and the non-stick protection component includes the outer wall 4 of the inner container. A first heat transfer surface 6 is disposed outside the outer wall 4 of the inner container, and a heat transfer contact point 10 is disposed inside the outer wall 4 of the inner container. A capillary support end 12 is disposed inside the heat transfer contact point 10. The non-stick protection component is used to improve the anti-sticking effect of the inner container body 1;
[0048] Specifically, as Figure 1 and Figure 2 shown, an inner wall 5 of the inner container is disposed inside the inner container body 1. A high-temperature deposition groove 9 is disposed inside the inner wall 5 of the inner container, and the heat transfer contact point 10 is disposed inside the high-temperature deposition groove 9. The gap surface between the heat transfer contact point 10 and the high-temperature deposition groove 9 is like a net in the pot. After the rice slurry is deposited and shrunk at the bottom, the outer surface is kept at a constant temperature and moves in the mesh gap, so that the rice slurry baked at a constant temperature forms a crust, and under the penetration of heat energy, it breathes and falls off, achieving a non-stick effect.
[0049] Specifically, as Figure 1 and Figure 2 shown, a diamond etching groove 11 is disposed on the top wall of the bottom 2 of the inner container. The capillary support end 12 is disposed inside the diamond etching groove 11. The diamond etching groove 11 is further subjected to deep physical treatment by sandblasting with 80-mesh abrasive + 120-mesh glass sand inside to obtain the capillary support end 12, and the contact area between the bottom 2 of the inner container and the rice is reduced through the capillary support end 12.
[0050] A heat dispersion component is disposed at the bottom end of the inner container body 1, and the heat dispersion component includes a heat deposition diffusion groove 7. A high-temperature deposition groove 9 is disposed inside the heat deposition diffusion groove 7. The heat dispersion component is used for the diffusion of the bottom heating temperature.
[0051] Specifically, as Figure 3 and Figure 4 shown, a groove is disposed at the bottom end of the bottom 2 of the inner container. The groove is used to increase the heating area. The bottom of the bottom 2 of the inner container is slightly convex. Through the arcuate setting, the bottom 2 of the inner container can be prevented from directly contacting the heat source, so that the temperature conduction is more uniform, and the inner wall of the bottom 2 is prevented from turning black and yellow due to local heating and being difficult to clean.
[0052] The present disclosure will be further described below in conjunction with embodiments.
[0053] It should be understood that these embodiments are only used to illustrate the present disclosure and not to limit the scope of the present disclosure.
[0054] Examples and comparative examples:
[0055] Example 1:
[0056] Provide the metal sheet required for the inner pot of the rice cooker; the metal sheet used has a double-layer structure, with an outer layer being an aluminum alloy layer (aluminum alloy 4A01) for heat conduction transfer and an inner layer being a stainless steel layer (316L) in contact with food. The metal sheet is subjected to a first etching process to obtain a metal sheet with a first surface texture formed; the first surface texture is a square, as Figure 1 shown; the square has a side length of 0.5 mm; the distance between the centers of adjacent squares in the horizontal or vertical direction is 0.75 mm; the metal sheet with the first surface texture formed is subjected to a stretching process and a bulging process to obtain a rough inner pot; the inner surface (stainless steel surface) of the rough inner pot is subjected to a second etching process to obtain a rough inner pot with a second surface texture formed; the second surface texture is a rhombus. The inner surface of the rough inner pot with the second surface texture formed is subjected to a first sandblasting treatment to obtain a rough inner pot after the first sandblasting treatment; the abrasive types used in the first sandblasting treatment include 60-mesh glass sand (first glass sand), 80-mesh glass sand (second glass sand), and 205-mesh ceramic sand; among them, the mass ratio of the 60-mesh glass sand, 80-mesh glass sand, and 205-mesh ceramic sand is selected from 1:1:1. In the first sandblasting treatment, the air source pressure is 1.5 - 3.5 MPa, the distance between the sandblasting gun nozzle and the inner pot is 2 - 3 cm, and the diameter of the sandblasting gun nozzle is 8 - 12 mm.
[0057] The outer surface (aluminum alloy surface) of the rough inner pot after the first sandblasting treatment is subjected to a second sandblasting treatment to obtain a rough inner pot after the second sandblasting treatment. Among them, the abrasive types used in the second sandblasting treatment include 60-mesh glass sand and 150-mesh ceramic sand, and the mass ratio is 1:1. In the second sandblasting treatment, the air source pressure is 0.4 - 0.6 MPa, the distance between the sandblasting gun nozzle and the inner pot is 3 - 5 cm, and the diameter of the sandblasting gun nozzle is 8 - 12 mm. Finally, through trimming and curling, the outer shape required for the rice cooker is achieved.
[0058] Examples 2 - 5:
[0059] The steps of Examples 2 - 5 are the same as those in Example 1, the difference being that the mesh numbers of the first glass sand, second glass sand, and third ceramic sand used are different (the mass ratios are all added in equal mass), as specifically shown in Table 1.
[0060] Comparative Examples 1 and 2:
[0061] The steps of Comparative Examples 1 and 2 are the same as those in Example 1, the difference being that Comparative Example 1 only uses ceramic sand, and Comparative Example 2 only uses glass sand, and the specific mesh numbers are shown in Table 1 (the mass ratios are all added in equal mass).
[0062] Table 1
[0063]
[0064] Salt spray test:
[0065] The test standard for the salt spray test is GB / T 10125—2012, and the grading standard for the salt spray test is GB / T 6461—2002; the test duration is 6 hours; the specific results are shown in Table 2:
[0066] Table 2
[0067] Example 1 Example 2 Example 3 Example 4 Example 5 Sodium chloride concentration 5％ 5％ 5％ 5％ 5％ Brine pH value 6.5 6.7 6.9 7.1 7.2 Air pressure 0.2 MPa 0.2 MPa 0.2 MPa 0.2 MPa 0.2 MPa Temperature 25℃ 25℃ 25℃ 25℃ 25℃ Humidity 70％ 70％ 70％ 70％ 70％ Saturation barrel temperature 47℃ 47℃ 47℃ 47℃ 47℃ Test result Passed Passed Passed Passed Passed
[0068] According to the above experimental results and Figure 5 and Figure 6 show that after 6 hours, no rusting problem occurred to the products.
[0069] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.
[0070] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A non-stick process for a deep surface physical treatment 0 coating, the process comprising a surface physical treatment process for the inner pot of an electric rice cooker, characterized in that, The physical treatment process for the surface of the rice cooker inner pot includes the following steps: Step 1: Provide the metal sheet required for the rice cooker inner pot; Step 2: Subject the metal sheet to a first etching process to obtain a metal sheet with a first surface texture formed thereon; Step 3: Subject the metal sheet with the first surface texture formed thereon to a stretching process and a bulging process to obtain a rough inner pot; Step 4: Subject the inner surface of the rough inner pot to a second etching process to obtain a rough inner pot with a second surface texture formed thereon; Step 5: Subject the inner surface of the rough inner pot with the second surface texture formed thereon to a first sandblasting treatment to obtain a rough inner pot after the first sandblasting treatment; Step 6: Subject the outer surface of the rough inner pot after the first sandblasting treatment to a second sandblasting treatment to obtain a rough inner pot after the second sandblasting treatment; Step 7: Subject the rough inner pot after the sandblasting treatment to a post-treatment to obtain the rice cooker inner pot.
2. The deep surface physical treatment 0 coating non-stick process according to claim 1, characterized in that, The metal sheet includes a first metal layer serving as the outer surface of the inner pot and a second metal layer serving as the inner surface of the inner pot provided on one surface of the first metal layer; wherein, the material of the first metal layer is selected from aluminum or its alloy, and the material of the second metal layer is selected from 316L stainless steel.
3. The deep surface physical treatment 0 coating non-stick process according to claim 1, characterized in that, The first surface texture is square or rhombus; the second surface texture is square or rhombus.
4. The deep surface physical treatment 0 coating non-stick process according to claim 1, characterized in that, In Step 5, the abrasive types used in the first sandblasting treatment are selected from (1) the single spraying treatment effect of the combination of glass sand of different mesh sizes, (2) the single spraying treatment effect of the combination of ceramic sand of different mesh sizes, and (3) the mixed sandblasting treatment effect of glass sand and ceramic sand of different mesh sizes.
5. The deep surface physical treatment 0 coating non-sticking process according to claim 4, characterized in that, In Step 5, the abrasive types used in the first sandblasting treatment include the single treatment of glass sand with a mesh size of 40 - 220 and the single treatment of ceramic sand with a mesh size of 100 - 450, as well as the combined treatment process of ceramic sand and glass sand.
6. The deep surface physical treatment 0 coating non-stick process according to claim 5, characterized in that, In Step 5, the abrasive types used in the first sandblasting treatment include 60 - mesh glass sand, 80 - mesh glass sand, and 205 - mesh ceramic sand; wherein, the mass ratio of the 60 - mesh glass sand, 80 - mesh glass sand, and 205 - mesh ceramic sand is selected from 1:1:
1.
7. The deep surface physical treatment 0 coating non-stick process according to claim 4, characterized in that, In Step 5, in the first sandblasting treatment, the air source pressure is 15 - 35 MPa, the distance between the sandblasting gun nozzle and the inner pot is 3 - 5 cm, and the diameter of the sandblasting gun nozzle is 8 - 12 mm.
8. The deep surface physical treatment 0 coating non-stick process according to claim 1, characterized in that, In Step 6, the abrasive types used in the second sandblasting treatment include 60 - 220 - mesh glass sand and 120 - 400 - mesh ceramic sand.
9. The deep surface physical treatment 0 coating non-stick process according to claim 8, characterized in that, In Step 6, in the second sandblasting treatment, the air source pressure is 15 - 35 MPa, the distance between the sandblasting gun nozzle and the inner pot is 3 - 5 cm, and the diameter of the sandblasting gun nozzle is 8 - 12 mm.
10. An inner pot of an electric rice cooker, characterized in that, The rice cooker inner pot is obtained by the deep - layer surface physical treatment 0 - coating non - sticking process according to any one of claims 1 - 9.