JP2750509B2 - Manufacturing method of metal container - Google Patents

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 a metal container having an open top, such as a general pot, a camping pot, tableware and the like.

[0002]

2. Description of the Related Art
For example, an aluminum pan or the like is subjected to curl processing in which after press-molding with a molding die, the upper edge of the opening of the molded container is turned outward.

[0003] However, curling can be performed with a thin material, but it is very difficult to form a thick material in consideration of strength and appearance.

[0004] For this reason, conventionally, when manufacturing a thick pot, the upper edge of the molded container has been cut and polished.

In view of this situation, the present invention eliminates the need for cumbersome curling and cutting and polishing, ensures sufficient strength of the body, is more palatable than curling and cutting and polishing, and has a better appearance. It is intended to provide an innovative method for producing a metal container that can provide a very good product.

[0006]

The gist of the present invention will be described with reference to the accompanying drawings.

[0007] mold 1 by forming a molded container body 2 having a lid engaging Godan portion 4 upper opening and pressed into the upper opening, the opening upper edge portion 3 of the forming condition 2 months Lumpur machining The rising portion from the lid engaging step portion 4 is not raised.
Rising to the method of manufacturing a metal container body, which comprises forming a longitudinally thicker wall thickness opening on the edge 3A from pressurized crush processed <br/> barrel periphery of the opening on the edges 3 It is related.

[0008]

This embodiment relates to a method for manufacturing an aluminum container having an open top. The container shown is used as a pot in a camp or the like and can be used as it is as a tableware after heating.

In this embodiment, a sheet material is press-formed by a forming die 1 shown in FIG. 1 to form a formed container 2 shown in FIG. (A plurality of molding dies 1 in which the molded body 2 is gradually formed may be sequentially press-molded to finally form the molded body 2.) The molded body 2 has strength and strength. In consideration of the appearance, it is formed of a thicker material than that of the conventional example (the body circumference is about 1.2 mm thick), and a lid engaging step 4 is formed on the upper edge 3 of the opening. I have.

In this embodiment, the rising edge of the upper edge 3 of the opening of the molded container 2 from the lid engaging step 4 is not curled or cut and polished as in the prior art. The upper edge 3 of the opening is crushed from the state shown in FIG. 3A to the state shown in FIG. The upper edge 3A of the opening is formed (the upper edge 3A of the thicker opening may be further polished).

In this embodiment, a material having a diameter of about 1.2 mm is press-formed to have a body circumference of about 1.2 mm.
The upper edge 3 of the opening having a thickness of about 3 mm is crushed as described above to form an upper edge 3A of a thickness of about 1.7 mm.

[0012] The container thus formed has a shape retention strength similar to curling, and can be easily processed at low cost unlike curling even when the material is thick, and has a good mouthfeel even when used as tableware. Is also better than curling.

As a result, especially in the case of an aluminum container or the like, even if it is formed of a thick material in consideration of the strength and appearance of the container, the upper edge can be easily processed at a low cost and excellent in mass productivity. It is a manufacturing method that has been adopted.

[0014]

As described above, since the present invention does not require curling, it is difficult to curl a thick material.
The upper edge can be easily processed by squeezing, the shape retention strength of the container can be sufficiently secured, and compared to the case of curling, it can be used as tableware and it can provide a good appearance and a good appearance And a method of manufacturing a metal container.

In addition, according to the present invention, a lid engaging step is provided at the upper opening.
To form a molded container having
Crush the rising part and make the upper edge of the opening thicker than the waist
Since it is formed at the upper edge of the thick opening, for example,
As described, from the lid engaging step on the upper edge of the opening of the molding container
Fix the rising part of
Low cost with simple crushing work
Innovative metal volume with excellent practicality that can form the upper edge of the mouth
This is the body manufacturing method.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a step of molding a molded container of the present embodiment.

FIG. 2 is an explanatory cross-sectional view showing a molded container before performing upper edge processing of the present embodiment.

FIG. 3 is an enlarged explanatory view of a main part showing an upper edge processing of the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mold 2 Mold container 3 Upper edge of opening 3A Upper edge of thick opening 4 Lid engaging step

Claims (1)

(57) [Claims] 1. A by press molding by mold open at the top to form a molded container body having a lid engaging Godan portion to the upper opening, without mosquito Lumpur machining an opening upper edge portion of the molding condition, Said
Set the rising part from the lid engaging step to this rising length
Method for producing a metal-made container body, characterized by forming a pressurized crush processed thick thickness opening on the edge from the barrel periphery of the opening on the edge from the direction.