Composite metal pot

Abstract

The utility model discloses a composite metal cookware, which relates to the technical field of cookware, and comprises a cookware body formed by a plurality of layers of metal, the cookware body comprises a bottom wall and a side wall, the side wall comprises a rotary thinning section with the thickness of 0.6-1.6 mm, and the thickness of the rotary thinning section is 30-80% of the thickness of the bottom wall. The utility model has the advantages of light weight and high material utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen utensils, and particularly relates to a composite metal cookware. Background Art

[0002] With the vigorous development of the social economy, people's pursuit of the quality of life is also increasing day by day. Among many materials, metal containers stand out due to their excellent ductility and outstanding durability. Especially metal cookware has become the preferred choice for wide applications.

[0003] In the related art, a composite metal plate is often stretched into a composite metal pot through a stretching process. However, the stretching process can only make a metal pot with a uniform thickness. The resulting composite metal pot is heavier and more waste will be generated during the production process. Summary of the Utility Model

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. For this reason, the utility model provides a composite metal cookware, which has the advantages of light weight and high material utilization rate.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A composite metal cookware, comprising a pot body composed of multiple layers of metal. The pot body includes a bottom wall and a side wall. The side wall includes a rotary thinning section with a thickness of 0.6 - 1.6 mm, and the thickness of the rotary thinning section is 30% - 80% of the thickness of the bottom wall.

[0007] In this application, at least part of the side wall of the pot body gradually deforms and thins under the action of a rotary press wheel during the rotary thinning process to form a rotary thinning section until it reaches a preset thickness. The volume of the resulting metal cookware increases, reducing the use cost of metal consumables, thereby reducing the production cost of the cookware. Before rotary thinning, the thickness of the bottom wall and the side wall is the same. After rotary thinning, the thickness of the rotary thinning section is 30% - 80% of the thickness of the bottom wall that has not been rotary thinned. By controlling the thinning degree of the rotary thinning section, the distribution of thermal stress and mechanical stress can be controlled, enabling the material to maintain a relatively stable state during the processing, and reducing the risk of deformation and cracking. In addition, compared with a conventional metal pot, the thickness of the rotary thinning section obtained by the rotary thinning process is smaller, which can reduce the weight of the pot body and increase the material utilization rate, avoiding material waste.

[0008] Optionally, the pot body includes an inner layer, an intermediate layer, and an outer layer arranged in sequence, and both the inner layer and the outer layer are metallurgically bonded to the intermediate layer.

[0009] Optionally, the inner layer and the intermediate layer are dissimilar metals, and the outer layer and the intermediate layer are dissimilar metals.

[0010] Optionally, the rotary thinning section is located in the middle of the side wall.

[0011] Optionally, an edge portion is formed at one end of the side wall away from the bottom wall, and the thickness of the edge portion is greater than the thickness of the rotationally thinned section.

[0012] Optionally, the edge portion extends in a direction away from the central axis of the cookware body.

[0013] Optionally, the metal cookware further includes an arc transition section disposed between the side wall and the bottom wall, and the side wall, the bottom wall and the arc transition section are integrally formed.

[0014] Optionally, the thickness of the arc transition section is the same as the thickness of the bottom wall.

[0015] Optionally, the cookware body is configured as a cylindrical shape.

[0016] Optionally, a flat unit is provided in the middle of the bottom wall, and the flat unit protrudes towards the inside of the cookware body.

[0017] These features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and the accompanying drawings. The best embodiments or means of the present utility model will be shown in detail in combination with the accompanying drawings, but it is not a limitation to the technical solution of the present utility model. In addition, these features, elements and components appear in multiple in each of the following texts and drawings, and different symbols or numbers are marked for convenience of representation, but all represent components with the same or similar structures or functions. Description of the Drawings

[0018] The present utility model will be further described below with reference to the accompanying drawings:

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0020] Figure 2 is a state change diagram of the composite metal cookware after rotational thinning in the present utility model;

[0021] Figure 3 is a schematic cooperation diagram of the rotational thinning device and the metal cookware.

[0022] Wherein, 1, metal cookware; 11, bottom wall; 111, flat unit; 12, side wall; 121, rotationally thinned section; 122, edge portion; 3, arc transition section; 2, rotational thinning device; 21, lower die; 22, pressure plate; 23, rotational thinning wheel; 24, stripping ring; 25, pressing plate. Detailed Description of the Embodiments

[0023] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the implementation manners, it is intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0024] As used in this specification, the phrase "one embodiment" or "example" or "instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The appearances of the phrase "in one embodiment" in various places in the specification do not necessarily all refer to the same embodiment.

[0025] Embodiment:

[0026] As Figure 1 shown, this embodiment provides a composite metal cookware, which includes a cookware body composed of multiple layers of metal. The cookware body includes a bottom wall 11 and a side wall 12. The side wall 12 includes a rotary thinning section 121 with a thickness of 0.6 - 1.6 mm, and the thickness of the rotary thinning section 121 is 30% - 80% of the thickness of the bottom wall 11.

[0027] In this embodiment, the cookware body of the composite metal cookware 1 is formed by compounding multiple layers of metal, that is, the blank of the metal cookware 1 is composite metal. The obtained composite metal combination combines the advantages of multiple metals, such as good heat conductivity, high durability, high safety, etc. In the related art, generally, a composite metal plate is stretched into the composite metal cookware 1 through a stretching process. However, the stretching process can only make the composite metal plate thinner as a whole and a large amount of waste will be generated during the manufacturing process, resulting in waste of materials. In this embodiment, a rotary thinning process is adopted to thin the side wall 12 of the cookware body, and a composite cookware with lighter weight and higher material utilization rate is obtained. As Figure 2As shown, during the spinning thinning process, the metal blank gradually deforms and thins under the action of the spinning wheel until it reaches the preset thickness. At the same time, the volume of the metal cookware 1 produced increases, reducing the use cost of metal consumables and thus reducing the production cost of the cookware. In this embodiment, the pot body is first formed by stretching a metal plate with a uniform thickness. At this time, the pot body is formed by enclosing a bottom wall 11 and a side wall 12 with the same thickness. At this time, at least part of the side wall 12 is subjected to the spinning thinning process to form a spun-thinning section 121, which reduces the weight of the pot body while increasing the volume of the pot body and reducing the production cost. In addition, during the process of spinning a composite metal plate, it is easy for the produced cookware to crack and wrinkle due to uneven stress distribution. Therefore, the thickness of the spun-thinning section 121 is set to 30% - 80% of the thickness of the bottom wall 11. Before spinning, the thicknesses of the bottom wall 11 and the side wall 12 are the same. After spinning is completed, the thickness of the spun-thinning section 121 is 30% - 80% of the thickness of the bottom wall 11 that has not been spun. Therefore, the thinning rate of the spun-thinning section 121 is 20% - 70%. This thinning rate can reduce the occurrence of cracks and wrinkles in the cookware, taking into account both the performance and stability of the cookware and the cost savings of materials. Controlling the thinning degree of the spun-thinning section 121 can also control the distribution of thermal stress and mechanical stress, keeping the material in a relatively stable state during the processing and reducing the risk of deformation and cracking. And at this thinning rate, when different layers of metal are extruded, they can achieve synchronous deformation, and at this time, metallurgical bonding can occur between different layers of metal, making the bonding force between different metal layers stronger and preventing the separation of multiple metal layers. Specifically, the thickness of the spun-thinning section is 0.6 - 1.6 mm. Compared with conventional metal cookware, the thickness of the spun-thinning section obtained by the spinning thinning process is smaller, which can reduce the weight of the pot body and increase the material utilization rate, avoiding material waste.

[0028] Specifically, when the thickness of the spun-thinning section 121 is less than 30% of the thickness of the bottom wall 11 after spinning is completed, the stability of the cookware is poor, and it is easy to crack and wrinkle; when the thickness of the spun-thinning section 121 is greater than 80% of the thickness of the bottom wall 11 after spinning is completed, there is more waste of cookware raw materials and the production cost is high.

[0029] The pot body includes an inner layer, a middle layer, and an outer layer arranged in sequence, and both the inner layer and the outer layer are metallurgically bonded to the middle layer.

[0030] In this embodiment, the pot body is formed by compounding three layers of metal. The inner layer is used to directly contact the food to be cooked. Therefore, the inner layer should be made of a metal that is corrosion-resistant, high-temperature-resistant, and easy to clean, such as titanium metal, stainless steel, etc.; the middle layer usually uses a material with good heat conduction performance, such as aluminum or copper, etc., so that heat can quickly transfer from the heat source to the inner layer and be evenly distributed throughout the pot body, improving the cooking efficiency; the outer layer material should be selected from metals that are easy to clean and have good corrosion resistance, such as aluminum metal, stainless steel, etc. In this embodiment, the pot body can also be formed by compounding four, five, or six layers.

[0031] The inner layer and the middle layer are made of dissimilar metals, and the outer layer and the middle layer are made of dissimilar metals.

[0032] In this embodiment, the inner layer and the middle layer are made of dissimilar metals, and the outer layer and the middle layer are also made of dissimilar metals. That is, the material of the middle layer is different from that of the inner layer and the outer layer. The metal type of each layer is selected according to its specific function and performance requirements, so as to improve the comprehensive performance of the prepared cookware. In addition, the outer layer and the inner layer can be made of the same material or different materials. In this embodiment, the thickness of the spinning-thinning section 121 is 30% - 80% of the thickness of the bottom wall 11. By controlling the thickness of the spinning-thinning section 121, the material strength and process requirements can be balanced. Even for cookware composed of three layers of dissimilar metals, the stability of the cookware can be improved and its cracking can be prevented.

[0033] The spinning-thinning section 121 is located in the middle of the side wall 12.

[0034] In this embodiment, the spinning-thinning section 121 is located in the middle of the side wall 12, that is, the middle part of the side wall 12 is subjected to a spinning-thinning process to form only the spinning-thinning section 121 in the middle of the side wall 12, ensuring the thickness of the top and bottom of the side wall 12. And the wall thickness is positively correlated with the structural strength. Therefore, this structure can ensure the strength of the top and bottom of the side wall 12 of the pot body, and can reduce the weight of the cookware without significantly reducing the overall strength of the cookware, which not only meets the user's demand for portability, but also ensures the durability and stability of the cookware. In addition, setting the spinning-thinning section 121 in the middle of the side wall 12 can also promote more uniform heat conduction. The thickness of the spinning-thinning section 121 is relatively thin, so it can respond to temperature changes faster, quickly conduct heat from the bottom of the side wall 12 to the upper middle part of the side wall 12, thereby reducing the accumulation of heat at the bottom of the side wall 12 and making the temperature inside the pot more uniform. In other embodiments, the entire side wall 12 can also be constructed as the spinning-thinning section 121, that is, the entire side wall 12 is subjected to a spinning-thinning process.

[0035] An edge portion 122 is formed at one end of the side wall 12 away from the bottom wall 11, and the thickness of the edge portion 122 is greater than the thickness of the spinning-thinning section 121.

[0036] In this embodiment, the edge portion 122 is the edge part of the cookware and is often affected by external forces such as collision and friction. Therefore, increasing the thickness of the edge portion 122 can significantly improve the durability of the cookware and prevent deformation or damage due to collision during use. Since the edge portion 122 has a greater possibility of direct contact with the user's hand, increasing the thickness of the edge portion 122 can reduce the speed of heat conduction to the hand, thereby protecting the user from scalding.

[0037] The edge portion 122 extends in a direction away from the central axis of the pot body.

[0038] In this embodiment, the rim portion 122 extends in a direction away from the central axis of the pot body, that is, the rim portion 122 bends and extends towards the outside of the pot body. Specifically, the rim portion 122 is configured to be horizontal, which can prevent the soup from overflowing, improve the safety during cooking, and is also beneficial to hygiene and cleaning.

[0039] The metal pot 1 further includes an arc transition section 3 provided between the side wall 12 and the bottom wall 11, and the side wall 12, the bottom wall 11 and the arc transition section 3 are integrally formed.

[0040] In this embodiment, the arc transition section 3 is the connecting part between the side wall 12 and the bottom wall 11. This arc transition section 3 can disperse and relieve the stress concentration phenomenon generated when the pot is heated or stressed, preventing the pot from cracking or deforming during long-term use. In addition, the arc transition section 3 makes the overall line of the pot more smooth and natural, enhancing its visual beauty. The integral formation of the side wall 12, the bottom wall 11 and the arc transition section 3 enables a seamless connection between the side wall 12, the bottom wall 11 and the arc transition section 3, improving the anti-deformation ability of the pot, simplifying the production process of the pot, and reducing the production cost. Specifically, the pot body is integrally formed from a metal blank through processes such as stretching. Its bottom has no weld seam, avoiding air leakage. The inner wall of the pot is smooth and has a high aesthetic degree.

[0041] The thickness of the arc transition section 3 is the same as the thickness of the bottom wall 11.

[0042] In this embodiment, the thickness of the arc transition section 3 is the same as the thickness of the bottom wall 11, and the arc transition section 3 has a relatively high strength, which is beneficial to resisting external pressure and internal stress. The integral forming process makes the side wall 12, the bottom wall 11 and the arc transition section 3 closely combined into a whole. When the thickness of the transition section is the same as that of the bottom wall 11, the integrity of the pot is further strengthened. The entire pot can maintain better shape stability when heated and stressed, reducing the risk of deformation and cracking.

[0043] The pot body is configured as a cylindrical shape.

[0044] In this embodiment, the pot body is a cylindrical shape formed by enclosing a vertical side wall 12 and a horizontal bottom wall 11. A cylindrical pot body usually has a relatively large heating area to improve the heat conduction efficiency. Heat can be quickly and evenly transferred to the food in the pot, shortening the cooking time and improving the cooking efficiency. In other embodiments, the pot body can also be configured as a hemispherical shape or a frustum shape, etc., which is not limited here.

[0045] The middle part of the bottom wall 11 has a planar unit 111, and the planar unit 111 protrudes towards the inside of the pot body.

[0046] In this embodiment, the planar unit 111 protruding towards the inside of the pot body can concentrate the heat source and ensure uniform heat transfer to other parts of the pot body, making the cooked food taste better.

[0047] As Figure 3 shown, the manufacturing steps of the metal cookware 1 in this embodiment are as follows:

[0048] S1. Select a surface-cleaned three-layer composite metal plate, and stretch the composite metal plate with a thickness of W into a cylindrical pot body with a pot opening, and the thickness of each part of the pot body remains unchanged before and after stretching.

[0049] S2. Put the pot opening downward on the lower die 21 of the spinning device 2. The pressure plate 25 of the spinning device 2 presses the pot body to ensure that the pot body fits with the lower die 21, and the pressure pad 22 moves downward to make the pot opening bear a certain pulling force.

[0050] S3. Turn on the coolant to spray the pot body. At the same time, at least one spinning wheel 23 on the side of the pot body extrudes the side wall 12 of the pot body, and the spinning wheel 23 performs spinning from top to bottom. The rotation speed of the lower die 21 is 1400 - 3000 rpm, and the feed speed of the spinning wheel from top to bottom is 200 - 600 mm / min. Generally, a spinning device will be provided with multiple spinning wheels arranged around the lower die 21. When the number of spinning wheels is two, the included angle between the two spinning wheels is 180 degrees; when the number of spinning wheels is three, the included angle between adjacent two spinning wheels is 120 degrees; when the number of spinning wheels is four, the included angle between adjacent two spinning wheels is 90 degrees.

[0051] S4. After spinning is completed, the spinning wheel 23 moves away along its own radial direction, the pressure pad 22 moves upward, and the pot body moves upward under the push of the stripping ring 24 of the lower die 21 and is pushed out of the area of the lower die 21.

[0052] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A composite metal cookware, comprising a pot body composed of multiple layers of metal, characterized in that: The pot body comprises a bottom wall (11) and a side wall (12); the side wall (12) comprises a thinned section (121) with a thickness of 0.6 to 1.6 mm; the thickness of the thinned section (121) is 30% to 80% of the thickness of the bottom wall (11).

2. The composite metal cookware according to claim 1, characterized in that: The pot body comprises an inner layer, a middle layer and an outer layer which are arranged in sequence, and the inner layer and the outer layer are metallurgically bonded to the middle layer.

3. The composite metal cookware according to claim 2, characterized in that: The inner layer and the middle layer are heterogeneous metals, and the outer layer and the middle layer are heterogeneous metals.

4. The composite metal cookware according to any one of claims 1 to 3, characterized in that: The spiral thin section (121) is located in the middle of the side wall (12).

5. The composite metal cookware according to any one of claims 1 to 3, characterized in that: A rim portion (122) is formed at one end of the side wall (12) away from the bottom wall (11), and the thickness of the rim portion (122) is greater than the thickness of the thinned section (121).

6. The composite metal cookware according to claim 5, characterized in that: The rim portion (122) extends in a direction away from the central axis of the pot body.

7. The composite metal cookware according to any one of claims 1 to 3, characterized in that: The metal cookware further comprises an arc-shaped transition section (3) arranged between the side wall (12) and the bottom wall (11); the side wall (12), the bottom wall (11) and the arc-shaped transition section (3) are integrally formed.

8. The composite metal cookware according to claim 7, characterized in that: The thickness of the arc-shaped transition section (3) is consistent with the thickness of the bottom wall (11).

9. The composite metal cookware according to any one of claims 1 to 3, characterized in that: The pot body is constructed in a cylindrical shape.

10. The composite metal cookware according to any one of claims 1 to 3, characterized in that: The middle part of the bottom wall (11) is provided with a plane unit (111), and the plane unit (111) protrudes toward the inside of the pot body.

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