Composite aluminum foil for cold stamping forming

Abstract

The utility model provides a composite aluminum foil for cold stamping forming, and belongs to the technical field of packaging materials. The composite aluminum foil comprises a first aluminum foil layer and a second aluminum foil layer, a boss is arranged on the first aluminum foil layer, an insertion hole matched with the boss in shape is formed in the second aluminum foil layer, the first aluminum foil layer and the second aluminum foil layer are attached to each other, the boss is clamped in the insertion hole, a first polytetrafluoroethylene layer is arranged on the first aluminum foil layer, and a second polytetrafluoroethylene layer is arranged on the second aluminum foil layer. The first aluminum foil layer and the second aluminum foil layer of the composite aluminum foil form a double-layer structure, the qualified rate of products formed through cold stamping can be increased, and the production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of packaging materials technology and relates to a composite aluminum foil for cold stamping. Background Technology

[0002] Due to its excellent properties, aluminum foil is widely used in daily necessities such as food and pharmaceuticals, and it is commonly used as a packaging material. In existing technologies, composite aluminum foil mostly uses single-layer aluminum foil to protect stored pharmaceuticals from moisture, oxidation, and light. However, single-layer aluminum foil is prone to tearing and damage due to excessive stretching during cold stamping, resulting in a high scrap rate of the finished products. Summary of the Invention

[0003] This utility model addresses the aforementioned problems in the existing technology by providing a composite aluminum foil for cold stamping. The technical problem to be solved by this utility model is: how to improve the product qualification rate.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A composite aluminum foil for cold stamping is characterized in that the composite aluminum foil comprises an aluminum foil layer one and an aluminum foil layer two, the aluminum foil layer one is provided with a boss, the aluminum foil layer two is provided with an insertion hole adapted to the shape of the boss, the aluminum foil layer one and the aluminum foil layer two are attached to each other and the boss is engaged in the insertion hole, the aluminum foil layer one is provided with a polytetrafluoroethylene layer, and the aluminum foil layer two is provided with a polytetrafluoroethylene layer.

[0006] This composite aluminum foil has a double-layer structure consisting of aluminum foil layer one and aluminum foil layer two. When the whole is cold-stamped, if aluminum foil layer one is damaged due to tensile deformation, aluminum foil layer two, which is not damaged, can seal the damaged area of ​​aluminum foil layer one to prevent leaks. Similarly, if aluminum foil layer two is damaged, aluminum foil layer one, which is not damaged, can seal the damaged area of ​​aluminum foil layer two. This improves the yield rate of cold-stamped products and reduces production costs.

[0007] The protrusions on aluminum foil layer one engage with the insertion holes on aluminum foil layer two for easy installation and significantly improved connection stability. Both PTFE layers one and two possess excellent wear resistance, high-temperature resistance, and corrosion resistance, effectively isolating the stored pharmaceuticals from the external environment.

[0008] In the aforementioned composite aluminum foil for cold stamping, the boss is square and has a chamfered top.

[0009] After the square protrusion is fixed in the insertion hole, it can prevent the aluminum foil layer one and aluminum foil layer two from rotating relative to each other, further improving the stability of the connection.

[0010] The top of the boss is chamfered, making it easier to insert into the groove and greatly improving the ease of installation.

[0011] In the aforementioned composite aluminum foil for cold stamping, there are two bosses distributed on one end and the other end of the aluminum foil layer, and there are also two insertion holes corresponding to one boss and the other boss respectively.

[0012] The two protrusions and corresponding insertion holes form two snap-fit ​​structures, further improving the stability of the connection between the two aluminum foil layers.

[0013] In the above-mentioned composite aluminum foil for cold stamping, the first aluminum foil layer has two flanges arranged opposite to each other, and the inner walls of the flanges are respectively provided with steps. The second aluminum foil layer has notches on one edge and the other edge. When the first aluminum foil layer and the second aluminum foil layer are in contact, the second aluminum foil layer is located between the two flanges, and the edge of the second aluminum foil layer is in contact with one flange and the other flange respectively. The steps are respectively against the groove walls of the corresponding notches.

[0014] The two flanges effectively limit the position of the aluminum foil layer, with the flanges abutting against the edge of the aluminum foil layer and the step abutting against the groove wall. This structure can further improve the stability of the connection between the two aluminum foil layers.

[0015] In the aforementioned composite aluminum foil for cold stamping, when the first aluminum foil layer and the second aluminum foil layer are in contact, the top of the flange is flush with the top of the second aluminum foil layer.

[0016] The top of the flange is on the same plane as the top of the second aluminum foil layer, allowing the second PTFE layer to make fuller contact with the second aluminum foil layer and the flange, thus improving the strength of the connection.

[0017] Compared with the prior art, the advantages of this utility model are as follows:

[0018] 1. The composite aluminum foil consists of aluminum foil layer one and aluminum foil layer two forming a double-layer structure. When aluminum foil layer one is damaged due to tensile deformation, aluminum foil layer two, which is not damaged, can seal the damaged area of ​​aluminum foil layer one to prevent leaks. When aluminum foil layer two is damaged, aluminum foil layer one, which is not damaged, can seal the damaged area of ​​aluminum foil layer two, thereby improving the pass rate of cold stamping products and reducing production costs.

[0019] 2. The protrusions on the first aluminum foil layer of this composite aluminum foil are engaged and fixed with the insertion holes on the second aluminum foil layer, which makes installation convenient and greatly improves the stability of the connection between the two. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of composite aluminum foil;

[0021] Figure 2 This is a schematic diagram of the structure of aluminum foil layer one;

[0022] Figure 3 yes Figure 2 Enlarged view of part A in the image;

[0023] Figure 4 This is a schematic diagram of the structure of aluminum foil layer two.

[0024] In the diagram: 1 Aluminum foil layer one, 2 Aluminum foil layer two, 3 Boss, 4 Insertion hole, 5 PTFE layer one, 6 PTFE layer two, 7 Chamfer, 8 Flanged edge, 9 Step, 10 Notch groove. Detailed Implementation

[0025] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1 , 2 As shown in Figure 4, the composite aluminum foil includes aluminum foil layer 1 and aluminum foil layer 2. A boss 3 is provided on aluminum foil layer 1, and an insertion hole 4 adapted to the shape of the boss 3 is provided on aluminum foil layer 2. Aluminum foil layer 1 and aluminum foil layer 2 are close together and the boss 3 is engaged in the insertion hole 4. A polytetrafluoroethylene layer 5 is provided on aluminum foil layer 1, and a polytetrafluoroethylene layer 6 is provided on aluminum foil layer 2.

[0027] The composite aluminum foil consists of a double-layer structure with aluminum foil layer 1 and aluminum foil layer 2. When the entire composite is cold-stamped, if aluminum foil layer 1 is damaged due to tensile deformation, aluminum foil layer 2, which is not damaged, can seal the damaged area of ​​aluminum foil layer 1 to prevent leaks. Similarly, if aluminum foil layer 2 is damaged, aluminum foil layer 1, which is not damaged, can seal the damaged area of ​​aluminum foil layer 2. This improves the yield rate of cold-stamped products and reduces production costs.

[0028] The protrusion 3 on aluminum foil layer 1 engages and is fixed with the insertion hole 4 on aluminum foil layer 2, making installation convenient and greatly improving the stability of the connection between the two. Polytetrafluoroethylene layer 5 and polytetrafluoroethylene layer 6 have good wear resistance, high temperature resistance, and corrosion resistance, isolating them from the external environment and providing better protection for the stored medicines.

[0029] like Figure 2 and 3 As shown, in this embodiment, the boss 3 is square, and the top of the boss 3 has a chamfer 7.

[0030] After the square protrusion 3 is snapped into the insertion hole 4, it can prevent the aluminum foil layer 1 and the aluminum foil layer 2 from rotating relative to each other, thus further improving the stability of the connection.

[0031] The top of the boss 3 is chamfered 7, which makes it easier to insert into the groove 1, greatly improving the ease of installation.

[0032] like Figure 2 and 4 As shown, in this embodiment, there are two bosses 3, which are distributed on one end and the other end of the aluminum foil layer 1. There are also two insertion holes 4, which correspond to one boss 3 and the other boss 3 respectively.

[0033] The two protrusions 3 and the corresponding insertion holes 4 form two snap-fit ​​structures, which further improve the stability of the connection between the two aluminum foil layers.

[0034] like Figure 1 , 2 As shown in Figure 4, in this embodiment, aluminum foil layer 1 has two flanges 8 arranged opposite to each other, and the inner wall of the flanges 8 has a step 9. One edge and the other edge of aluminum foil layer 2 have a notch 10. When aluminum foil layer 1 and aluminum foil layer 2 are in contact, aluminum foil layer 2 is located between the two flanges 8, and the edge of aluminum foil layer 2 is in contact with one flange 8 and the other flange 8 respectively. The step 9 abuts against the groove wall of the corresponding notch 10.

[0035] The two flanges 8 effectively limit the aluminum foil layer 2, with the flanges 8 abutting against the edge of the aluminum foil layer and the step 9 abutting against the groove wall of the notch 10. This structure can further improve the stability of the connection between the two aluminum foil layers.

[0036] Preferably, when aluminum foil layer 1 and aluminum foil layer 2 are in contact, the top of the flange 8 is flush with the top of aluminum foil layer 2.

[0037] The top of the flange 8 is on the same plane as the top of the aluminum foil layer 2, which allows the polytetrafluoroethylene layer 6 to make fuller contact with the aluminum foil layer 2 and the flange 8, thus improving the strength of the connection.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A composite aluminum foil for cold stamping, characterized in that, The composite aluminum foil includes an aluminum foil layer one (1) and an aluminum foil layer two (2). The aluminum foil layer one (1) is provided with a boss (3), and the aluminum foil layer two (2) is provided with an insertion hole (4) adapted to the shape of the boss (3). The aluminum foil layer one (1) and the aluminum foil layer two (2) are close together and the boss (3) is engaged in the insertion hole (4). The aluminum foil layer one (1) is provided with a polytetrafluoroethylene layer one (5), and the aluminum foil layer two (2) is provided with a polytetrafluoroethylene layer two (6).

2. The composite aluminum foil for cold stamping according to claim 1, characterized in that, The boss (3) is square, and the top of the boss (3) has a chamfer (7).

3. The composite aluminum foil for cold stamping according to claim 1, characterized in that, The boss (3) is two and is distributed on one end and the other end of the aluminum foil layer (1). The insertion hole (4) is also two and corresponds to one boss (3) and the other boss (3) respectively.

4. A composite aluminum foil for cold stamping according to claim 1, 2, or 3, characterized in that, The aluminum foil layer one (1) has two flanges (8) arranged opposite to each other. The inner wall of the flanges (8) has a step (9). The aluminum foil layer two (2) has a notch (10) on one edge and the other edge. When the aluminum foil layer one (1) and the aluminum foil layer two (2) are in contact, the aluminum foil layer two (2) is located between the two flanges (8). The edge of the aluminum foil layer two (2) is in contact with one flange (8) and the other flange (8) respectively. The step (9) abuts against the groove wall of the corresponding notch (10).

5. The composite aluminum foil for cold stamping according to claim 4, characterized in that, When the aluminum foil layer one (1) and the aluminum foil layer two (2) are in contact, the top of the flange (8) is flush with the top of the aluminum foil layer two (2).

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