Aluminum cap forming method and aluminum cap

Abstract

The application discloses an aluminum cover forming method and an aluminum cover and relates to the technical field of aluminum cover manufacturing. The aluminum cover forming method comprises the following steps: S1, placing an aluminum plate into an initial forming die, and forming a macro-domain large curved surface in the middle of the aluminum plate and an initial foot position with the same height as a required foot position on the circumferential edge of the aluminum plate through the extrusion force of a press machine and the initial forming die; S2, placing the aluminum plate preliminarily formed in S1 into a final forming die, and further forming the macro-domain large curved surface formed in the middle of the aluminum plate into a final shape at room temperature through the final forming extrusion pressure of the press machine, and flowing and filling the edge cavity of the final forming die to form an edge through the extrusion of the final forming die, and forming a final foot position shape through the extrusion of the initial foot position; and S3, opening the die to take out the formed aluminum cover. The production of the large-size foot position height aluminum cover can be realized at room temperature, the energy consumption is low, and the aluminum cover is simple and convenient to manufacture.

Description

Technical Field

[0001] This invention relates to the field of aluminum cap manufacturing technology, and in particular to an aluminum cap forming method and an aluminum cap. Background Technology

[0002] There are generally two methods for manufacturing aluminum caps with feet and edges: traditional extrusion molding and casting. Traditional extrusion molding uses 3003 aluminum alloy (3.0mm or thicker) directly extruded using a 3000T-5000T press. Limited by material properties, the foot height (H) is generally only 2.5-3mm, resulting in a small mating surface with the pot body, unstable fit, and an unattractive appearance. Casting, on the other hand, involves a complex process: raw materials → inspection → smelting → slag removal → pouring → cooling → gate cutting → aging treatment → inspection. While it can achieve larger foot heights, it cannot be done at room temperature, resulting in high energy consumption. Furthermore, the final product may have defects such as oxide inclusions, air bubbles, shrinkage cavities, cracks, and high silicon content, making hard anodizing impossible. Therefore, it is essential to find a simple way to manufacture large-sized aluminum caps with high foot heights at room temperature to improve the overall product quality. Summary of the Invention

[0003] The purpose of this invention is to provide an aluminum cap forming method and an aluminum cap to solve the problems existing in the prior art. It can realize the production of large-size foot height aluminum caps at room temperature, with low energy consumption and simple and convenient manufacturing.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a method for forming an aluminum cap, comprising the following steps:

[0006] S1, place the aluminum sheet into the initial forming mold, and apply initial forming extrusion pressure through a press at room temperature. The extrusion pressure of the press and the initial forming mold form a large curved surface in the middle of the aluminum sheet, while the circumferential edge of the aluminum sheet forms an initial foot position with the same height as the required foot position.

[0007] S2, the aluminum sheet that has been preliminarily shaped in S1 is placed into the final forming mold. At room temperature, the final forming extrusion pressure is applied by a press to further shape the large curved surface formed in the middle of the aluminum sheet into the final shape. The aluminum sheet material at the initial foot position and the middle of the aluminum sheet near the initial foot position flows and fills the edge cavity of the final forming mold under the extrusion of the final forming mold to form the edge. The initial foot position is formed into the final foot position shape after extrusion.

[0008] S3, Open the mold and remove the formed aluminum cap.

[0009] Preferably, before S1, the aluminum sheet is inspected as raw material.

[0010] Preferably, the height of the initial and final foot positions is ≥6mm.

[0011] The present invention also provides an aluminum cap formed based on any of the above aluminum cap forming methods, including a cap body and a foot, wherein the foot is annular and is fixedly disposed below the cap body, the outer diameter of the foot is smaller than the outer diameter of the cap body, and the portion of the cap body located on the side away from the axis of the cap body from the foot forms an edge.

[0012] Preferably, the cover and the foot are integrally formed.

[0013] Preferably, both the cover and the foot are made of 3003 aluminum alloy.

[0014] Preferably, the cover protrudes outward toward the side away from the foot position.

[0015] Preferably, the cover and the foot are subjected to hard anodizing treatment.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The aluminum cap forming method provided by this invention involves initially forming an aluminum sheet at room temperature using a preliminary forming mold, creating a large curved surface in the center and initial foot positions on the circumferential edges. Then, the initial foot positions are further formed by extrusion using a final forming mold, resulting in the final foot position shape and extruded edge structure. The aluminum sheet that has undergone preliminary forming can achieve smoother material flow during the second final forming, improving the deformation resistance of the aluminum sheet and reducing the generation of defects during forming. This method enables the production of aluminum caps with large foot heights and, compared to traditional casting forming methods, has lower energy consumption and is simpler and more convenient to manufacture.

[0018] Furthermore, inspecting raw materials such as surface quality and appearance before extruding aluminum sheets can improve product quality and reduce the number of defective products; it allows for timely processing of defective aluminum sheets, avoiding wasted production time; it can improve the stability and consistency of the production process; it can increase production efficiency, reduce unnecessary rework or maintenance, and improve the product qualification rate.

[0019] Furthermore, the initial and final foot heights can be made larger according to actual needs, making them more stable to fit the pot body, more aesthetically pleasing, and with a better lid fit.

[0020] The present invention also provides an aluminum lid, which extends into the pot body through the foot and fits against the inner side wall of the pot, and the edge is pressed against the top surface of the opening on the pot body, so that it can fit more stably and firmly against the pot body and ensure the sealing effect.

[0021] Furthermore, the cover and feet are integrally molded, resulting in a robust structure that reduces the types of processing equipment and lowers processing costs.

[0022] Furthermore, the material is made of 3003 aluminum alloy, which has excellent thermal conductivity, enabling the pot to maintain a stable temperature; it is also easy to clean, does not easily leave stains, and is convenient for daily use and maintenance; it has good temperature resistance, can be used at higher temperatures, and is not easily deformed or cracked; and the material is non-toxic and environmentally friendly.

[0023] Furthermore, the lid protrudes outwards to the side away from the foot, which increases the lid's own strength and also increases the internal volume of the pot.

[0024] Furthermore, hard anodizing treatment can give aluminum caps better corrosion resistance and wear resistance, allowing them to maintain their aesthetic appeal and safe use for a long time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the final aluminum cap product structure formed by the aluminum cap forming method provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the initial molded product formed by the initial molding mold in the aluminum cap forming method provided by the present invention.

[0028] Figure 3 A schematic diagram of the aluminum sheet forming process via a preliminary forming mold in the aluminum cap forming method provided by the present invention;

[0029] Figure 4 This is a schematic diagram of the aluminum sheet forming process by the final forming mold in the aluminum cover forming method provided by the present invention.

[0030] In the diagram: 100-Aluminum cap; 10-Cap body; 20-Edge; 30-Feet; 40-Initial feet; 50-Final forming mold; 51-Second punch; 52-Second die; 60-Initial forming mold; 61-Pressure ring; 62-Pressure ring pad; 63-First punch; 64-First die; 70-Aluminum sheet; 80-Initial formed product. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The purpose of this invention is to provide an aluminum cap forming method and an aluminum cap to solve the problems existing in the prior art. It can realize the production of large-size foot height aluminum caps at room temperature, with low energy consumption and simple and convenient manufacturing.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] This embodiment provides a method for forming an aluminum cap, such as... Figures 1-4 As shown, it includes the following steps:

[0036] S1, place the aluminum sheet 70 into the initial forming mold 60, such as Figure 2 and Figure 3 As shown, at room temperature, a preliminary forming extrusion pressure is applied by a press. The extrusion pressure of the press and the preliminary forming mold 60 form a large curved surface in the middle of the aluminum sheet 70, while the circumferential edge of the aluminum sheet 70 forms a preliminary foot position 40 with the same height as the required foot position 30.

[0037] S2, place the preliminarily shaped aluminum sheet 70 from S1 into the final forming mold 50, such as... Figure 1 and Figure 4 As shown, at room temperature, the final forming extrusion pressure is applied by a press to further shape the large curved surface formed in the middle of the aluminum sheet 70 into the final shape. The material of the aluminum sheet 70 near the initial foot position 40 and the middle of the aluminum sheet 70 flows and fills the edge cavity of the final forming mold 50 under the extrusion of the final forming mold 50 to form the edge 20. The initial foot position 40 is formed into the final foot position 30 shape after extrusion.

[0038] S3, open the mold and remove the formed aluminum cap 100.

[0039] By initially forming the aluminum sheet 70 at room temperature using the initial forming mold 60, a large curved surface is first formed in the center, and the initial foot position 40 is formed on the circumferential edge. Then, the initial foot position 40 is formed a second time by extrusion using the final forming mold 50, forming the final foot position 30 shape and extruding the edge 20 structure. The aluminum sheet 70 after initial forming can have smoother material flow during the second final forming, which improves the deformation resistance of the aluminum sheet 70 and reduces the generation of defects in forming. It can realize the production of large-size foot position 30 height aluminum cover 100. Compared with the traditional casting forming method, it has low energy consumption and is simple and convenient to manufacture.

[0040] Specifically, the method of forming the aluminum cap 100 through the above two-stage molding can be applied to aluminum sheets 70 with a thickness of 2.0mm or more. Compared with the material thickness of 3.5mm or more used in the traditional one-time extrusion forming of aluminum cap 100, it can form aluminum cap 100 products with a smaller thickness, thus achieving lower manufacturing costs.

[0041] Specifically, it is formed using a 3000T to 5000T press.

[0042] Specifically, the outer shape of the product cavity formed by the initial molding mold 60 is similar to that of... Figure 2 The initial molded product 80 shown has the same shape; and the final molded product cavity of the mold 50 has the same shape as shown. Figure 1 The final aluminum cap 100 product shown has the same shape.

[0043] Specifically, the shape of the initial molding die 60 and the initial molding product 80 are as follows: Figure 3 As shown, the aluminum sheet 70 is fixed by the pressure ring 61 of the initial forming mold 60, and the initial forming product 80 is pressed and released by the first punch 63 and the first die 64 moving closer or further apart; the shape of the final forming mold and the final aluminum cover 100 product are as follows. Figure 4 As shown, the pressing of the final aluminum cap 100 product is completed by the second punch 51 and the second die 52 of the final forming mold approaching or moving away from each other.

[0044] Specifically, a pressure ring pad 62 is also provided below the pressure ring 61.

[0045] Specifically, the dimensions and shapes of the edge 20 and feet 30 on the aluminum cover 100 can be set according to product requirements.

[0046] Specifically, all of the above extrusion molding is carried out at room temperature, which reduces the difficulty of operation; and compared with the casting process, there is no high temperature or exhaust pollution generated by raw material melting during the molding process, which ensures the working environment of the operators.

[0047] In the optional schemes of this embodiment, a preferred approach is to perform raw material inspection on the aluminum sheet 70 before S1. Performing raw material inspection on the aluminum sheet 70 before extrusion forming, such as surface quality and appearance inspection, can improve product quality and reduce the number of defective products; it allows for timely processing of defective aluminum sheets 70, avoiding wasted production time; it can improve the stability and consistency of the production process; it increases production efficiency, reduces unnecessary rework or maintenance, and improves the product qualification rate.

[0048] In the optional solutions of this embodiment, it is more preferred that the height of the initial foot position 40 and the final foot position 30 is ≥6mm. The height of the initial foot position 40 and the final foot position 30 can be made larger according to actual needs, so that they fit more stably with the pot body, have a more beautiful appearance, and a better sealing effect.

[0049] Specifically, the height of the foot 30 of the final aluminum cover 100 product formed by the above aluminum cover forming method can be smaller than 6mm or larger than 6mm. It is mainly used, but not limited to, the production of aluminum cover 100 products with a foot 30 height of 6mm and above.

[0050] Example 2

[0051] This embodiment provides an aluminum cap 100 formed based on Embodiment 1, such as... Figure 1 As shown, the device includes a lid 10 and a foot 30. The foot 30 is annular and is fixedly positioned below the lid 10. The outer diameter of the foot 30 is smaller than the outer diameter of the lid 10. The portion of the lid 10 located on the side of the foot 30 away from the axis of the lid 10 forms an edge 20. The foot 30 extends into the pot body and fits against the inner side wall of the pot, while the edge 20 presses against the top surface of the opening on the pot body. This ensures a more stable and secure fit with the pot body, guaranteeing a proper lid seal.

[0052] Specifically, the edges 20 and the foot 30 can also be ground to avoid sharp edges that could pose a risk of cuts to people.

[0053] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, the cover 10 and the foot 30 are integrally formed. The integral forming of the cover 10 and the foot 30 results in a robust structure and reduces the types of processing equipment required, thereby lowering processing costs.

[0054] In this embodiment, a preferred option is that both the lid 10 and the feet 30 are made of 3003 aluminum alloy. 3003 aluminum alloy has excellent thermal conductivity, ensuring stable temperature inside the pot; it is easy to clean, does not easily retain stains, and is convenient for daily use and maintenance; it has good temperature resistance, allowing it to be used at higher temperatures without easily deforming or cracking; and it is non-toxic and environmentally friendly.

[0055] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, the lid 10 protrudes outward to the side away from the foot position 30. The outward protrusion of the lid 10 to the side away from the foot position 30 can increase the strength of the lid 10 itself and increase the internal volume of the pot body.

[0056] In this embodiment, a preferred option is to perform hard anodizing on the cover 10 and the foot position 30. Hard anodizing gives the aluminum cover 100 good corrosion resistance and wear resistance, allowing it to maintain its aesthetic appeal and safe use for a long time.

[0057] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for forming an aluminum cap, characterized in that: Includes the following steps: S1. Place an aluminum sheet with a thickness of 2.0mm or more into a preliminary forming mold. Apply preliminary forming extrusion pressure through a press at room temperature. The extrusion pressure of the press and the preliminary forming mold form a large curved surface in the middle of the aluminum sheet, while the circumferential edge of the aluminum sheet forms a preliminary foot position with the same height as the required foot position. S2, the aluminum sheet that has been preliminarily shaped in S1 is placed into the final forming mold. At room temperature, the final forming extrusion pressure is applied by a press to further shape the large curved surface formed in the middle of the aluminum sheet into the final shape. The aluminum sheet material at the initial foot position and the middle of the aluminum sheet near the initial foot position flows and fills the edge cavity of the final forming mold under the extrusion of the final forming mold to form the edge. The initial foot position is formed into the final foot position shape after extrusion. The height of the initial and final foot positions is ≥6mm; S3, Open the mold and remove the formed aluminum cap.

2. The aluminum cap forming method according to claim 1, characterized in that: Before S1, the aluminum sheet is inspected as raw material.

3. An aluminum cap formed according to the aluminum cap forming method of any one of claims 1 to 2, characterized in that: It includes a cover and a foot. The foot is annular and is fixedly disposed below the cover. The outer diameter of the foot is smaller than the outer diameter of the cover. The portion of the cover located on the side away from the axis of the cover from the foot forms an edge.

4. The aluminum cap according to claim 3, characterized in that: The cover and the foot are integrally formed.

5. The aluminum cap according to claim 3, characterized in that: Both the cover and the feet are made of 3003 aluminum alloy.

6. The aluminum cap according to claim 3, characterized in that: The cover protrudes outward toward the side away from the foot position.

7. The aluminum cap according to claim 3, characterized in that: The cover and the foot area are subjected to hard anodizing treatment.

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