Cold-pressed bottom cookware

Abstract

This utility model discloses a cold-pressed double-bottomed cookware, which includes a cookware body and a magnetic sheet. The magnetic sheet is fixed to the bottom surface of the cookware body. The magnetic sheet includes a plate and a flange formed by bending upward around the edge of the plate. The plate has a plurality of uniformly distributed first through holes with a diameter of 0.05 to 0.1 mm. The flange has a plurality of second through holes. The magnetic sheet is pressed and embedded in the bottom surface of the cookware body. Part of the material of the cookware body is embedded and filled in the first and second through holes.

Description

Technical Field

[0001] This utility model relates to the field of cooking apparatus technology, and in particular to a cold-bottomed cookware. Background Technology

[0002] Existing cold-pressed multi-layered cookware generally includes a cookware body and a magnetic sheet bonded to the bottom surface of the cookware body. The bottom surface of the cookware body has rivet posts, and the magnetic sheet has folded holes. The magnetic sheet is placed into the bottom surface of the cookware body and pressed together with a pressure of 1000-2500T, riveting the rivet posts and folded holes to fix the magnetic sheet to the cookware body. However, the existing structure of cold-pressed multi-layered cookware requires folded holes in the magnetic sheet, resulting in a smaller effective area of ​​the magnetic sheet, reducing the thermal efficiency during electromagnetic heating. Furthermore, after a period of use, thermal expansion and contraction make the bottom of the cookware more difficult to clean.

[0003] Therefore, there is a need to improve existing cold-pressed bottom cookware. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cold-sealed cookware, which can solve the problems of low electromagnetic heating efficiency and difficulty in cleaning the bottom of the pot in existing cold-sealed cookware, and ensure a firm bond between the magnetic sheet and the cookware body.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a cold-pressed bottom cookware, comprising a cookware body and a magnetic sheet, wherein the magnetic sheet is fixed to the bottom surface of the cookware body, the magnetic sheet comprising a plate and a flange formed by bending upward around the edge of the plate, the plate having a plurality of uniformly distributed first through holes with a diameter of 0.05 to 0.1 mm, the flange having a plurality of second through holes, the magnetic sheet being pressed and embedded in the bottom surface of the cookware body, and a portion of the material of the cookware body being embedded and filled in the first and second through holes.

[0006] Furthermore, the spacing between adjacent first through holes in the same row or column is 1 to 10 mm.

[0007] Furthermore, the thickness of the plate is 0.3 to 1 mm.

[0008] Furthermore, the height of the flange is 0.8–3 mm.

[0009] Furthermore, the diameter of the second through hole is 0.3 to 1.5 mm.

[0010] Furthermore, the second through holes are evenly distributed on the flange, and the distance between adjacent second through holes is 1 to 10 mm.

[0011] Furthermore, the inclination angle between the flange and the plate is 90° to 93°.

[0012] Furthermore, the height of the flange is 2.4 to 3 times the thickness of the plate, and the diameter of the second through hole is 1 to 1.5 times the thickness of the plate.

[0013] Furthermore, the magnetic conductive sheet is made of stainless steel.

[0014] Furthermore, the cookware body is made of aluminum or aluminum alloy.

[0015] The beneficial technical effects of this utility model are as follows: In this cold-bottomed cookware, the diameter of the first through hole formed on the plate of the magnetic sheet is designed to be 0.05-0.1mm. This small hole design has two advantages: First, it has minimal impact on the effective area of ​​the magnetic sheet. When used in an induction cooker, it hardly interferes with the distribution of the magnetic field and the formation of the induced current, enabling high-efficiency electromagnetic heating and meeting the need for rapid heating during use. Second, it allows for the design of a sufficient number of first through holes without significantly reducing the effective area of ​​the magnetic sheet, ensuring sufficient contact points between the cookware body and the plate, increasing the bonding strength between the magnetic sheet and the cookware body. Furthermore, the hole formed on the plate... The design of the first through hole and the second through hole formed on the flange allows part of the cookware body material to be embedded and filled into the first and second through holes through pressing to fix the magnetic sheet. This multi-directional bonding of the magnetic sheet and the cookware body ensures a strong connection between them. The diameter of the first through hole is so small that it is difficult to see with the naked eye, ensuring the consistency of the magnetic sheet's appearance and improving the aesthetics of the cold-pressed bottom cookware. Furthermore, the thermal expansion and contraction during use will not cause significant changes in the gap between the first through hole and the embedded filling material, preventing oil stains from entering and facilitating the cleaning of the bottom of the cold-pressed bottom cookware. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of a cold-pressed double-bottomed cookware.

[0017] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the magnetic conductive sheet.

[0019] Figure 4 yes Figure 3 A magnified view of a portion of the image.

[0020] Figure 5 This is a top view of the magnetic conductive sheet.

[0021] Figure 6 yes Figure 5 A magnified view of a portion of the image. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] It should be understood that, in the description of this utility model, unless otherwise expressly specified and limited, the terms "first," "second," ... are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features; "a plurality of" means two or more, unless otherwise expressly and specifically limited.

[0024] refer to Figures 1 to 6In some of the disclosed embodiments, the cold-pressed bottom cookware includes a cookware body 10 and a magnetic sheet 20 fixed to the bottom surface of the cookware body 10. The magnetic sheet 20 includes a plate 21 and a flange 22 formed by bending upward around the edge of the plate 21. The plate 21 has a plurality of uniformly distributed first through holes 210 with a diameter of 0.05 to 0.1 mm. The flange 22 has a plurality of second through holes 220. The magnetic sheet 20 is pressed and embedded into the bottom surface of the cookware body 10. At the same time, part of the material of the cookware body 10 is embedded and filled into the first through holes 210 and the second through holes 220 to form a joint point between the two, thereby realizing the composite fixation of the magnetic sheet 20 to the bottom surface of the cookware body 10. In this cold-bottomed cookware, the diameter of the first through hole 210 formed on the plate 21 of the magnetic sheet 20 is designed to be 0.05-0.1mm. This small aperture design has two advantages: firstly, it has minimal impact on the effective area of ​​the magnetic sheet 20, and when used in an induction cooker, it hardly interferes with the distribution of the magnetic field and the formation of the induced current, enabling high-efficiency electromagnetic heating and meeting the need for rapid heating during use; secondly, it allows for the design of a sufficient number of first through holes 210 without significantly reducing the effective area of ​​the magnetic sheet 20, ensuring sufficient contact points between the cookware body 10 and the plate 21, increasing the bonding strength between the magnetic sheet 20 and the cookware body 10; and thirdly, the first through hole 210 formed on the plate 20 and the first through hole 210 formed on the plate 20 have a small diameter of 0.05-0.1mm. The design of the second through hole 220 on the flange 22 allows part of the material of the cookware body 10 to be embedded and filled into the first through hole 210 and the second through hole 220 through pressing to fix the magnetic sheet 20. This multi-directional bonding of the magnetic sheet 20 and the cookware body 10 ensures the firmness of the bond between the magnetic sheet 20 and the cookware body 10. The diameter of the first through hole 210 is small, and its existence is difficult to be clearly observed with the naked eye, ensuring the consistency of the appearance of the magnetic sheet 20 and improving the aesthetics of the cold-pressed bottom cookware. Furthermore, the thermal expansion and contraction during use will not cause significant changes in the gap between the first through hole 210 and the embedded filling material, preventing oil stains from entering and facilitating the cleaning of the bottom of the cold-pressed bottom cookware.

[0025] In some embodiments, the spacing D1 between adjacent first through holes 210 in the same row or column is designed to be 1 to 10 mm, so that the number of first through holes 210 formed by the magnetic sheet 20 is kept at an appropriate level. This ensures that sufficient bonding points are formed between the magnetic sheet 20 and the cookware body 10 to ensure the bonding force between the two, while avoiding a significant reduction in the effective area of ​​the magnetic sheet 20 and a reduction in the number of processing steps for the first through holes 210.

[0026] The diameter of the second through hole 220 is larger than that of the first through hole 210. In some embodiments, the diameter of the second through hole 220 can be designed to be 0.3–1.5 mm. Therefore, a larger contact point can be formed between the flange 22 and the cookware body 10, thereby improving the bonding strength between the magnetic sheet 20 and the cookware body 10. In some embodiments, the second through holes 220 are evenly distributed on the flange 22 of the magnetic sheet 20, so that the contact point between the flange 22 and the cookware body 10 is evenly distributed, which helps to improve the stability of the bonding between the magnetic sheet 20 and the cookware body 10. In some embodiments, the spacing D2 between adjacent second through holes 220 is designed to be 1–10 mm.

[0027] In some embodiments, the thickness H1 of the plate 21 of the magnetic sheet 20 is designed to be 0.3 to 1 mm, and the height of the flange 22 is designed to be 0.8 to 3 mm.

[0028] Admittedly, in other embodiments, the thickness of the plate 21 of the magnetic sheet 20, the height of the flange 22, and the diameter of the second through hole 220 can also be designed to other dimensions. Preferably, the height H2 of the flange 22 is designed to be 2.4 to 3 times the thickness H1 of the plate 21 of the magnetic sheet 20, and the diameter of the second through hole 220 is designed to be 1 to 1.5 times the thickness H1 of the plate 21 of the magnetic sheet 20.

[0029] Furthermore, the tilt angle α between the flange 22 and the plate 21 is 90° to 93°. This improves the fusion transition effect between the composite magnetic sheet 20 and the cookware body 10, making the cold-finished cookware more aesthetically pleasing and meeting consumers' requirements for the appearance quality of cookware.

[0030] The magnetic sheet 20 can be made of magnetically conductive materials such as stainless steel. It is formed by stamping with a mold to form a flange 22, and by laser cutting to form a first through hole 210 and a second through hole 220. The cookware body 10 can be made of suitable materials such as aluminum or aluminum alloy, and is made into the preset shape by processing techniques such as stretching and spinning.

[0031] The following describes a method for preparing cold-pressed bottom cookware. However, the following description of the preparation method for cold-pressed bottom cookware is not intended to limit this utility model.

[0032] Step S1: Prepare magnetic sheet 20.

[0033] A 0.5mm thick, 150mm diameter 430 stainless steel disc is selected as the magnetic sheet blank and placed on the worktable of a laser cutting equipment. According to the pre-designed range of plate 21 and flange 22, a first through hole 210 with a diameter of 0.1mm is cut on the plate 21, and the spacing between two adjacent first through holes 210 in the same row or column is 5mm. Then, a second through hole 220 with a diameter of 0.5mm is cut on the outer edge of the magnetic sheet blank, and the spacing between two adjacent first through holes 210 in the same row is 5mm. Then, a stamping die is used to stamp the outer edge of the magnetic sheet blank to form a flange 22 with an inclination angle of 91° and a height of 1.2mm.

[0034] Step S2: Prepare the cookware body 10.

[0035] A 3003 aluminum alloy round plate with a thickness of 3.5mm is selected as the blank material for the cookware body. The blank material is processed into the preset shape of the cookware body through a stretching process. Then, the prepared cookware body 20 can be polished to ensure that the cookware body 20 is smooth and burr-free.

[0036] Step S3: Composite cookware body 10 and magnetic sheet 20.

[0037] The prepared magnetic sheet 20 is aligned with the bottom surface of the cookware body 10 and placed in a pressure device. A pressure of 1200T is applied to press the magnetic sheet 20 and the cookware body 10 together to form a complete cold-pressed bottom cookware. The finished cold-pressed bottom cookware is then subjected to appearance inspection, thermal efficiency testing, bonding strength testing, and cleaning performance testing.

[0038] Admittedly, in other embodiments, the magnetic sheet 20 can be first bonded to the cookware body blank, and then the cookware body blank can be processed into the preset cookware body shape through a stretching process.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments. All equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the present utility model.

Claims

1. A cold bottomed vessel, characterized in that, The cold-sealed cookware includes: The cookware body; A magnetic sheet is fixed to the bottom surface of the cookware body. The magnetic sheet includes a plate and a flange formed by bending upward around the edge of the plate. The plate has a plurality of evenly distributed first through holes with a diameter of 0.05 to 0.1 mm. The flange has a plurality of second through holes. The magnetic sheet is pressed and embedded into the bottom surface of the cookware body. Part of the material of the cookware body is embedded and filled into the first and second through holes.

2. The cold bottomed vessel of claim 1, wherein The spacing between adjacent first through holes in the same row or column is 1 to 10 mm.

3. The cold bottomed vessel of claim 1, wherein, The thickness of the plate is 0.3 to 1 mm.

4. The cold bottomed vessel of claim 1 wherein, The height of the flange is 0.8–3 mm.

5. The cold bottomed vessel of claim 1 wherein, The diameter of the second through hole is 0.3 to 1.5 mm.

6. The cold bottomed vessel of claim 1 wherein, The second through holes are evenly distributed on the flange, and the distance between adjacent second through holes is 1 to 10 mm.

7. The cold bottomed vessel of claim 1 wherein, The angle of inclination between the flange and the plate is 90° to 93°.

8. The cold bottomed vessel of claim 1 wherein, The height of the flange is 2.4 to 3 times the thickness of the plate, and the diameter of the second through hole is 1 to 1.5 times the thickness of the plate.

9. The cold bottomed vessel of claim 1 wherein, The magnetic conductive sheet is made of stainless steel.

10. The cold bottomed vessel of claim 1 wherein, The cookware body is made of aluminum or aluminum alloy.

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