Coating structure of a ceramic pot with a logo
By using a coating structure of a blank layer, a ceramic base coat and a transparent surface coating on the ceramic pot, the inorganic metal oxides are discolored under high temperature conditions to form a mark, and through high-temperature laser outline, the cumbersome processing methods of the existing cooking utensils and potential harm to human health are solved, and the clear visibility and safety of the mark are achieved.
Patent Information
- Application Number
- CN202323247282.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-30
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2033-11-30
AI Technical Summary
The processing method of the inner liner of the existing cooking utensils is complicated and the clarity is insufficient. The wear of the coating on the back of the ink pad printing will cause the ink to come into contact with food, which is harmful to human health.
The coating structure of a ceramic pot is adopted, including a blank layer, a ceramic basecoat and a transparent surface coating. The ceramic basecoat is equipped with an identification area, and an identification pattern is formed by discoloring inorganic metal oxides under high temperature conditions, and the identification is outlined by high-temperature laser.
It realizes clear visibility of the logo, does not cause harm to human health, simplifies the processing process, increases production capacity and reduces costs.
Smart Images
Figure CN222737713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a cooking utensil, in particular to a coating structure of a ceramic pot with a logo. Background Art
[0002] In various existing cooking utensils, the inner pot is usually marked, such as the amount of water added, the highest water level or the amount of food filled, etc., to facilitate users to view and operate. At present, there are generally two ways to process the inner pot mark: direct stamping and ink pad printing. However, the stamping method can only be used to process metal inner pots, and the stamped mark is unclear, and only simple numbers and letters can be stamped out; although the ink pad printing method can be used to mark metal or ceramic inner pots, and the mark is not limited to numbers and letters, the ink pad printing needs to go through the processes of primer coating, drying and cooling, pad printing water level line, top coating, sintering, line transfer, external spraying, re-sintering and flush packaging. Not only is the process complicated, the pad printing effect is not good, and the clarity is insufficient, but after a period of use, the ink is easily worn out due to the wear of the top coating, causing the ink to directly contact the food in the inner pot and participate in the heating, which is harmful to human health. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a coating structure of a ceramic pot with a mark, the mark on the coating structure is clear, will not cause harm to human health, and is easy to process, which can effectively improve production capacity and reduce costs.
[0004] In order to solve the above technical problems, the technical solutions adopted are as follows:
[0005] A coating structure of a ceramic pot with a logo, including a green body layer, characterized in that it also includes a ceramic base coating and a transparent top coating, the ceramic base coating and the transparent top coating are sequentially coated on the inner side surface of the green body layer; at least one logo area is provided on the ceramic base coating, and the logo area has a logo pattern formed by discoloration of an inorganic metal oxide under high temperature conditions.
[0006] In a preferred embodiment, at least the marking area in the ceramic primer layer is coated with a mixture of silicon dioxide and inorganic metal oxides and sintered at a low temperature, and the sintering temperature is usually 250-400°C.
[0007] In the above coating structure, the blank layer (i.e., the inner blank), the ceramic base coating, and the transparent top coating are stacked from the outside to the inside, and the marking area in the ceramic base coating is coated with a mixture of silicon dioxide and inorganic metal oxides and sintered at low temperature. When processing the marking, the marking area can be irradiated by a high-temperature laser. The high-temperature laser can cause the inorganic metal oxide to undergo irreversible color change, thereby outlining the required logo. Various characters can be outlined at will, not limited to numbers and letters, and the outlined logo is clear and visible. At the same time, the transparent top coating will not be damaged by laser irradiation, and the surface can remain smooth, which protects the logo and ensures that the logo is clearly visible through the transparent layer. The ceramic pot adopts this coating structure. When marking, it only needs to go through the primer, top coating, drying, outer coating, sintering and flush packaging to complete the entire marking process. Compared with the existing ink pad printing, the process is simpler, which can effectively increase production capacity and reduce costs. Even if the transparent top coating is worn after long-term use, the exposed ceramic base coating will not cause harm to human health.
[0008] It is an existing technology that inorganic metal oxides change color under high temperature conditions. The identification pattern is formed by utilizing the principle that inorganic metal oxides change color under high temperature conditions, thereby forming a color difference between the identification pattern and other areas on the ceramic base coating, making the pattern clearly visible.
[0009] In the preferred embodiment, the inorganic metal oxide is titanium dioxide or iron oxide. As needed, lasers of different temperatures can be used to irradiate the area to be marked to ensure that the color of the marked text after irradiation is significantly different from the original color of the ceramic base coating. The irradiation temperature is usually 600-1000°C, so that the inorganic metal oxide can both undergo irreversible color change and avoid melting of silicon dioxide. For example, titanium dioxide is grayish white when irradiated by laser at 700°C and dark gray when irradiated by laser at 900°C; iron oxide is dark red when irradiated by laser at 700°C and dark brown when irradiated by laser at 900°C; these inorganic metal oxides are all non-toxic, and even if the transparent topcoat is worn, causing the base coating to directly contact the food and heat, it will not cause harm to human health.
[0010] In a preferred embodiment, the transparent surface coating is formed by coating and sintering silicon dioxide. Generally, the transparent surface coating has a temperature resistance of at least 1200° C. The use of silicon dioxide can be transparent and will not be affected by laser irradiation.
[0011] The beneficial effects of the utility model are: the markings on the coating structure are clear, no harm is caused to human health, and the processing is convenient, which can effectively improve the production capacity and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of the coating in Example 1 of the utility model. DETAILED DESCRIPTION
[0013] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments: Example
[0014] like Figure 1 The coating structure of a ceramic pot with a logo shown in the figure includes a green body layer 1, a ceramic base coating 2 and a transparent top coating 3, wherein the ceramic base coating 2 and the transparent top coating 3 are sequentially coated on the inner side of the green body layer 1; a logo area 201 is provided on the ceramic base coating 2, and the logo area 201 has a logo pattern formed by discoloration of an inorganic metal oxide under high temperature conditions.
[0015] The marking area 201 in the ceramic primer layer 2 is formed by coating a mixture of silicon dioxide and inorganic metal oxide and sintering at a low temperature. The sintering temperature is 280°C.
[0016] In the above coating structure, the blank layer 1 (i.e., the inner blank), the ceramic base coating 2, and the transparent top coating 3 are stacked from the outside to the inside, and the marking area 201 in the ceramic base coating 2 is coated with a mixture of silicon dioxide and inorganic metal oxides and sintered at low temperature. When processing the marking, the marking area 201 can be irradiated by a high-temperature laser. The high-temperature laser can cause the inorganic metal oxide to undergo irreversible color change, thereby outlining the required mark. Various characters can be drawn at will, not limited to numbers and letters, and the outlined mark is clear and visible. At the same time, the transparent top coating 3 will not be damaged by the irradiation of the laser, and the surface can remain smooth, which protects the mark and ensures that the mark is clearly visible through the transparent layer. The ceramic pot adopts this coating structure. When marking, it only needs to go through the primer, top coating, drying, outer coating, sintering and flush packaging to complete the entire marking process. Compared with the existing ink pad printing, the process is simpler, which can effectively improve production capacity and reduce costs. Even if the transparent top coating 3 is worn after long-term use, the exposed ceramic base coating 2 will not cause harm to human health.
[0017] It is an existing technology that inorganic metal oxides change color under high temperature conditions. The identification pattern is formed by using the principle that inorganic metal oxides change color under high temperature conditions, thereby forming a color difference between the identification pattern and other areas on the ceramic base coating 2, making the pattern clearly visible.
[0018] The inorganic metal oxide is titanium dioxide. As needed, lasers of different temperatures can be used to irradiate the area to be marked to ensure that the color of the marked text after irradiation is significantly different from the original color of the ceramic base coating 2. The irradiation temperature is usually 600-1000°C, so that the inorganic metal oxide can undergo irreversible color change while avoiding the melting of silicon dioxide. For example, titanium dioxide is grayish white when irradiated by a laser at 700°C and dark gray when irradiated by a laser at 900°C. Even if the transparent top coating 3 is worn, causing the base coating to directly contact the food and heat up, it will not cause harm to human health.
[0019] The transparent top coating 3 is formed by coating and sintering silicon dioxide, which can be transparent and not be affected by laser irradiation. Example
[0020] The difference between this embodiment and embodiment 1 is that the inorganic metal oxide is iron oxide.
Claims
1. A coating structure of a ceramic pot with a logo, comprising a green layer, characterized in that: It also includes a ceramic base coating and a transparent top coating, which are sequentially coated on the inner side of the blank layer; at least one identification area is provided on the ceramic base coating, and the identification area has an identification pattern formed by irreversible color change of inorganic metal oxide under high temperature conditions.
2. The coating structure of a ceramic pot with a logo as claimed in claim 1, characterized in that: The inorganic metal oxide is titanium dioxide or iron oxide.
3. The coating structure of a ceramic pot with a logo as claimed in claim 1, characterized in that: The transparent top coating is formed by coating and sintering silicon dioxide.