JPH06279888A - Production of aluminum alloy for impact molding and vessel made of aluminum alloy - Google Patents

Abstract

PURPOSE:To promote the recycle of an aluminum allay for impact molding and reduce the production cost of an impact aluminum can. CONSTITUTION:Aluminum stock for impact molding is mixed with spent aluminum alloy for shear spinning and/or spent aluminum alloy for can top stock, and this mixture is melted and regenerated to produce an aluminum alloy for impact molding. By using this aluminum alloy, the improvement of the thinning, lightening and strength of a can barrel and a can bottom can be embodied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an aluminum alloy for impact molding and a container made of an aluminum alloy, and more specifically to an aluminum alloy for impact molding in which the recycling of the aluminum alloy is promoted and the production cost is reduced. The present invention relates to an aluminum alloy container, which has a thin wall and a thin wall and is improved in strength.

[0002]

2. Description of the Related Art In general, aluminum alloys have recently been remarkably expanded in demand for aerosol containers and the like by taking advantage of their beauty and low specific gravity. Along with this, it is necessary to promote recycling of used aluminum alloys. Will help protect resources and reduce manufacturing costs. In particular, all aluminum depends on imports from overseas, so it is important to ensure a stable supply. Regarding the conventional aluminum alloy for squeezed ironing cans (hereinafter referred to as DI cans), the used DI cans or chips produced during the DI can manufacturing process are melted and mixed with the base aluminum material for DI cans. It was being recycled. As applications for recycling such aluminum alloys for DI cans, there are JP-A-3-243730 and JP-A-4-147928.

[0003]

However, with regard to the aluminum alloy for impact molding, an aluminum alloy obtained by mixing such a used aluminum alloy with a base aluminum material for impact molding (pure aluminum) and melting it is conventionally used. No manufacturing method or aluminum alloy container existed. This is because it is difficult to recycle aluminum alloy due to a special process called impact molding.

The present invention has been made in view of such a conventional problem, and promotes the recycling of the aluminum alloy for impact molding and also reduces the manufacturing cost of the impact aluminum container. It is an object of the present invention to provide an aluminum alloy container in which the can body and the can bottom are made thinner, the weight is reduced, and the buckling strength and pressure resistance are improved.

[0005]

In order to solve this problem, the first invention relates to an aluminum material for impact molding,
Used draw ironing aluminum alloy and /
Or mix aluminum alloy for used can lid material,
A method for producing an aluminum alloy for impact molding, which is characterized in that it is melted and regenerated, and as an example thereof, an aluminum material JIS1070 is mixed with a used aluminum alloy JIS3004 and / or a used aluminum alloy JIS5182 and melted. It is characterized by being reproduced. The second invention is the aluminum alloy for impact molding produced by the first invention,
The aluminum alloy container is manufactured by impact molding or impact ironing molding.

[0006]

[Function] With the above structure, the impact molding aluminum material JIS1070 (commonly called pure aluminum) is
The reason for mixing JIS3004 and / or used aluminum alloy JIS5182 as the used aluminum alloy is as follows. That is, JIS1070 has been used for many impact aluminum products such as aerosol cans. JIS1070
Is an aluminum material having a softness and strength sufficiently suitable for impact molding, and JIS3004 is an aluminum alloy often used as a material for DI cans such as beer and juice. Furthermore, JIS5182 is an aluminum alloy that is often used as a lid material for DI cans. Therefore, the amount of scrap of these DI cans or can lids is enormous, and the inventors considered that mixing these used aluminum alloys is the most economical and effective. However, the aluminum alloy alone is not suitable for impact molding (hardness and tensile strength are too large, and therefore cannot be molded by ordinary impact press), and JIS1070 aluminum alloy has good formability by impact press. As described above, there is a drawback that the manufacturing cost is high. Therefore, the present inventors have taken the formability and the manufacturing cost into consideration, and within the range that can be molded by the currently used impact press, the most effective manufacturing method of the used aluminum alloy and the aluminum alloy container are provided. I came up with a plan.

The impact forming aluminum material as the base is not limited to JIS 1070, but other 1000 series materials such as JIS 1 can be used.
050 or JIS1100 may be used, and the used aluminum alloy to be mixed is JIS300.
The material is not limited to 4, but may be other 3000 series materials such as JIS standard or AA standard 3104 or 3105. The used 5000 series aluminum alloy to be further mixed is JIS518
The number is not limited to 2, and may be JIS5082 or JIS5052. The 3000 series and 5000 series aluminum alloys may be mixed at the same time, or only one of them may be mixed. The mixing ratio can be arbitrarily determined. The 1000 series aluminum alloy, 3000 series aluminum alloy, and 5000 series aluminum alloy are concepts that include JIS standard and AA standard aluminum alloys.

[0008]

EXAMPLE An example of a method for producing an aluminum alloy for impact molding according to the first invention will be described. As an example, aluminum material JIS1070 for impact molding
And a used aluminum alloy JIS3004 and a used aluminum alloy JIS5182 having a mixing ratio (weight ratio) of 2: 1 were manufactured, and samples thereof were prepared. The chemical composition and mechanical properties of this sample are shown in Tables 1 and 2 below.

[Table 1]

[Table 2]

[0009] Next, JIS has been conventionally used as a material for aerosol cans as an aluminum material for impact molding.
The chemical composition and mechanical properties of 1070 are shown in Tables 3 and 4.

[Table 3]

[Table 4]

Further, an aerosol can manufactured by impact molding an aluminum material JIS1070 for impact molding, an aluminum material JIS1070 which is an embodiment of the second invention, and a used aluminum alloy JIS3.
004 and used aluminum alloy JIS518
2 is mixed at a weight ratio of 2: 1 and melted, and an aluminum alloy obtained by impact molding is used to sample a test piece from an aerosol can produced by impact molding, the mechanical properties of the test piece are measured, and the seat of the aerosol can is measured. The flexural strength and pressure resistance were measured. The results are shown in Table 5.

[Table 5]

From Table 5, it can be seen that the aerosol cans manufactured by impact molding the aluminum alloy for impact molding according to the second aspect of the present invention have the same tensile strength and hardness as long as the aerosol cans have the same diameter, height and thickness. Was improved by about 40%, and the buckling strength and pressure resistance were improved by about 20%, which proved to be superior to the strength of the conventional aerosol can.
When an aerosol can having the same buckling strength and compressive strength as a conventional aerosol can is manufactured using the aluminum alloy for impact molding according to the present invention, the can body and the can bottom are thinner than the conventional can. By reducing the thickness of this can, the production cost of the aerosol can was reduced. In addition, by arbitrarily changing the mixing ratio (weight ratio) of the aluminum material JIS1070 and the used aluminum alloy JIS3004 and / or the used aluminum alloy JIS5182 in the range of 1: 1 to 4: 1, a desired mechanical property can be obtained. It goes without saying that an aerosol can having characteristics can be obtained and the production cost can be reduced.

Further, the impact alloying aluminum alloy according to the present invention is used to perform ironing (ironing) on the body of an aerosol can once impact-molded. During processing, scratches on the can surface can be erased, the surface of the aerosol can becomes smooth, and the thickness of the can body can be further reduced.

[0013]

As described above, according to the first invention of the present invention, by mixing the used aluminum alloy, the manufacturing cost can be greatly reduced and the second invention can be achieved. According to this, it is possible to reduce the thickness and weight of the aluminum alloy container, and to improve buckling and pressure resistance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Nakano Inventor Hideaki Nakano 6-4 Minamihonmachi, Itami City, Hyogo Prefecture Nihon Rolling Industry Co., Ltd. (72) Inori Inori Yoshimura Tamura 6-6 Minamihonmachi, Itami City, Hyogo Prefecture Address No. 6 in Nihon Rolling Industry Co.

Claims (4)

[Claims] 1. An aluminum material for impact molding,
Used draw ironing aluminum alloy and /
Or mix aluminum alloy for used can lid material,
A method for producing an aluminum alloy for impact molding, which comprises melting and regenerating. 2. The aluminum alloy for impact molding according to claim 1, wherein the aluminum alloy 1000 series is mixed with a used aluminum alloy 3000 series and / or a used aluminum alloy 5000 series and melted to be regenerated. Manufacturing method. 3. The mixing ratio (weight ratio) of the aluminum material JIS1070 and the used aluminum alloy JIS3004 and / or the used aluminum alloy JIS5182 is 1: 1 to 4: 1. Of manufacturing aluminum alloy for impact molding. 4. Claim 1 or claim 2 or claim 3.
An aluminum alloy container manufactured by impact molding or impact ironing molding of the above-described impact molding aluminum alloy.