Search

CN-121987068-A - Pot, cooking utensil and manufacturing method of pot

CN121987068ACN 121987068 ACN121987068 ACN 121987068ACN-121987068-A

Abstract

The application provides a pot liner, a cooking utensil and a manufacturing method of the pot liner. The pot liner comprises a substrate and a coating film. The substrate has a first surface. The coating comprises a bottom layer, a middle layer and a surface layer. The bottom layer is adhered to the first surface through physical vapor deposition, and the bottom layer is a chromium nitride layer. The middle layer is adhered to the bottom layer through physical vapor deposition, and is a mixed layer of titanium nitride and metallic titanium. The surface layer is adhered to the intermediate layer by physical vapor deposition, and is a chromium nitride layer or a mixed layer of chromium nitride and titanium nitride. The first surface of the substrate provides a basis for attachment of the coating. The bottom layer, the middle layer and the surface layer are sequentially arranged, the tight combination among the layers is realized through a physical vapor deposition technology, the binding force between the coating and the matrix is enhanced, and the problem that the coating falls off or peels off in the use process is avoided. In the scheme, the coating film has a brand new structure through the arrangement of the intermediate layer. The layers can be tightly combined and mutually supported, and the non-tackiness is remarkably improved.

Inventors

  • ZHONG CHENGEN
  • HUANG JIAJIAN
  • Ying Yupeng
  • LI JIANG

Assignees

  • 浙江苏泊尔家电制造有限公司

Dates

Publication Date
20260508
Application Date
20250718
Priority Date
20241105

Claims (14)

  1. 1. A pot liner, which comprises a pot liner, characterized by comprising the following steps: a substrate having a first surface; A plating film, the plating film comprising: the bottom layer is attached to the first surface through physical vapor deposition, and is a chromium nitride layer; the middle layer is attached to the bottom layer through physical vapor deposition, and is a mixed layer of titanium nitride and metallic titanium; and the surface layer is attached to the intermediate layer through physical vapor deposition, and is a chromium nitride layer or a mixed layer of chromium nitride and titanium nitride.
  2. 2. The pot liner according to claim 1, wherein, The thickness of the coating film is 0.5-1.7 mu m, and/or The thickness of the bottom layer is 0.1-0.2 μm, and/or The thickness of the intermediate layer is 0.3-1.0 μm, and/or The thickness of the surface layer is 0.1-0.5 mu m.
  3. 3. The pot liner according to claim 1, wherein the thickness of the coating film is 0.5-2 μm.
  4. 4. The pot liner according to claim 1, wherein the metallic titanium content is 10-50% wt based on the total mass of the intermediate layer.
  5. 5. The pot liner according to claim 1, wherein the content of metallic titanium is less than or equal to 10% wt, and the content of metallic titanium is greater than 0% wt, based on the total mass of the coating film.
  6. 6. The pot liner of claim 1, wherein the substrate comprises a first metal layer, a thermally conductive layer, and a second metal layer that are sequentially joined along a thickness direction thereof.
  7. 7. The pot of any one of claims 1 to 6, wherein the first surface of the base is provided with grooves.
  8. 8. The pot liner according to claim 7, wherein, The grooves being configured as a communicating array structure, and/or The depth of the groove is 0.03mm-0.05mm.
  9. 9. The pot of claim 7, wherein the opening area of the groove is less than or equal to 50% based on the inner surface area of the pot.
  10. 10. The bladder according to claim 1 wherein the outer surface of the skin layer faces the interior of the bladder.
  11. 11. A cooking appliance, characterized in that it comprises a pot according to any one of claims 1 to 10.
  12. 12. The manufacturing method of the pot liner is characterized by comprising the following steps: a step of preparing a matrix, which is to pretreat the matrix and place the matrix in physical vapor deposition equipment; physical vapor deposition step: taking chromium as a target material, reacting gasified chromium with nitrogen to form chromium nitride, and depositing the chromium nitride on the first surface of the matrix to form a bottom layer; taking titanium as a target material, reacting gasified titanium with nitrogen to form titanium nitride, and depositing titanium atoms and titanium nitride on the surface of the bottom layer to form an intermediate layer; Taking chromium as a target material, reacting the gasified chromium with nitrogen to form chromium nitride, and depositing the chromium nitride on the surface of the intermediate layer to form a surface layer.
  13. 13. The method of manufacturing a pot liner according to claim 12, wherein in the physical vapor deposition step: the time for forming the bottom layer is 10-30min; The time for forming the intermediate layer is 30-60min; the time for forming the surface layer is 15-30min.
  14. 14. The method of manufacturing a pot liner according to claim 12, wherein the preparing a substrate step includes: A groove forming step of etching or embossing a groove in the first surface of the substrate; The step of dewaxing, namely adopting talcum powder to dewater the first surface with the groove; Sanding the first surface after the dewaxing treatment; and a cleaning step, namely carrying out ultrasonic cleaning on the first surface after sanding treatment.

Description

Pot, cooking utensil and manufacturing method of pot Technical Field The application relates to the technical field of cooking appliances, in particular to a pot liner, a cooking appliance and a manufacturing method of the pot liner. Background In the prior art, a titanium-containing coating film is arranged on a substrate to realize non-stick performance. Pure metallic titanium in the form of atoms has low adhesion efficiency and seriously affects production efficiency. The titanium-containing plating film needs to have a thickness of 200nm or more to function as a titanium layer. Titanium itself is also unstable and is easily oxidized. Accordingly, there is a need to provide a pot liner, a cooking appliance and a manufacturing method of the pot liner, so as to at least partially solve the above problems. Disclosure of Invention In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the application is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. To at least partially solve the above problems, a first aspect of the present application provides a pot liner, comprising: a substrate having a first surface; A plating film, the plating film comprising: the bottom layer is attached to the first surface through physical vapor deposition, and is a chromium nitride layer; the middle layer is attached to the bottom layer through physical vapor deposition, and is a mixed layer of titanium nitride and metallic titanium; and the surface layer is attached to the intermediate layer through physical vapor deposition, and is a chromium nitride layer or a mixed layer of chromium nitride and titanium nitride. According to the pot liner of the first aspect of the application, the base body is a main body part of the pot liner and is provided with a first surface, so that an attaching basis is provided for coating. The bottom layer, the middle layer and the surface layer are sequentially arranged, the tight combination among the layers is realized through a physical vapor deposition technology, the binding force between the coating and the matrix is enhanced, and the problem that the coating falls off or peels off in the use process is avoided. In the scheme, the coating film is made to have a brand new structure by improving the material of the coating film. The layers can be tightly combined and mutually supported. Through the coating arrangement, the non-tackiness of the substrate is obviously improved. Optionally, the thickness of the coating film is 0.5-1.7 μm, and/or The thickness of the bottom layer is 0.1-0.2 μm, and/or The thickness of the intermediate layer is 0.3-1.0 μm, and/or The thickness of the surface layer is 0.1-0.5 mu m. Optionally, the thickness of the coating film is 0.5-2 μm. According to this solution, the thickness is sufficient to ensure a firm bond between the bottom layer and the matrix, to ensure a uniform distribution of metallic titanium and titanium nitride in the middle layer, to ensure that the surface layer is effectively resistant to external wear and corrosion. The service life of the whole coating film is long. Alternatively, the metallic titanium is present in an amount of 10-50% wt based on the total mass of the intermediate layer. According to the scheme, the toughness of the coating can be improved while the hardness of the coating is ensured by adjusting the proportion of the metallic titanium to the titanium nitride. Alternatively, the metallic titanium is present in an amount of less than or equal to 10 wt% and greater than 0 wt% based on the total mass of the coating. According to the scheme, a proper amount of metallic titanium can ensure the tight combination between the middle layer and the substrate as well as between the middle layer and the bottom layer, so that the risk of falling off or peeling off of the coating film in the use process is reduced. Optionally, the substrate includes a first metal layer, a heat conducting layer, and a second metal layer sequentially connected along a thickness direction thereof. According to the scheme, the heat conduction layer is clamped between the two metal layers, so that a closed heat conduction path can be formed, and uniform distribution and rapid transfer of heat are facilitated. Optionally, the first surface of the substrate is provided with grooves. According to this scheme, reduce the area of contact with food through the recess setting, increase the roughness of first surface simultaneously. In addition, the grooves can also increase the contact area between the substrate and the coating film and improve the binding force. Optionally, the grooves are configured as a communicating array structure. According to the scheme, the communicated grooves can form a continuous heat conduction pa