JPS6233581A - Production of metallic vessel - Google Patents

Abstract

PURPOSE:To reduce cost by using a metallic sheet stock ornamented by subjecting the surface of the metallic sheet to various surface treatments and forming vessels having excellent corrosion resistance and beauty with a fully automated forming stage. CONSTITUTION:The metallic sheet stock 3 formed by preliminary subjecting the entire surface of the metallic sheet 1 to the surface treatments 2 such as ornamenting, coating or rust preventive treatment is used and the vessel 4 is formed by a combination of a stage for blanking to a suitable shape and a drawing stage. An open end 5 of the vessel 4 is cut off and formed by an end cutting stage using pressing, etc. to form a finished end face 6. The end faces 6 are arrayed to face a specified direction and while many pieces of such vessels 4 are continuously fed, films 7 of an ornamental material such as heat drying type paint, paint curable by UV rays or paint curable by electron rays are successively coated and formed on the surfaces 6 by a continuous coating stage. The above-mentioned vessels are formed by the fully automated forming stage, by which the cost reduction is made possible.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method of manufacturing a metal container, which uses a raw metal plate whose entire surface has been subjected to various surface treatments, and which has excellent corrosion resistance and aesthetic appearance. The present invention relates to a method of manufacturing a metal container that allows the container to be provided at a low cost.

[Technical Background of the Invention and its Problems] Conventionally, aluminum plates, brass plates, and the like have often been used as materials for metal containers for cosmetics and the like.

In the case of an aluminum plate, this container was formed by press-forming, followed by polishing and alumite treatment. In the case of brass, after press molding, it is pretreated with a surface treatment agent such as Kirinsu, or decorated with plating. However, among these forming processes, although the press forming process has been automated to the maximum extent possible, there is still a need to reduce the cost of this process. However, even though the press forming process has been automated to the limit, it is currently difficult to automate the alumite treatment, surface treatment painting, or plating decoration process, and it is difficult to automate any of the above processes. Work always required human labor.

For example, in the case of alumite treatment, alumite treatment is performed by stacking multiple press-molded containers in a processing box, or by stacking containers alternately between rods and applying electricity. Alternatively, a jig is formed by spirally winding aluminum or titanium wires, and a container is placed between the wires of this jig and electricity is applied to perform alumite treatment. In addition, manual work is inevitably required when placing the container on the jig during the ground surface treatment process or the plating and decoration process.
It was difficult to achieve complete automation.

[Purpose of the Invention] Therefore, in view of the above-mentioned points, the present invention does not use the conventional forming method in which decoration is applied after press forming, but the material metal is decorated by applying various surface treatments to the surface of the metal plate. It was created with the aim of reducing costs by making it possible to mold a container with excellent corrosion resistance and aesthetic appearance using a plate using a fully automated molding process.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention uses a raw metal plate whose entire surface has been previously subjected to a surface treatment such as a decoration process, a coating process, or an anti-corrosion process. , containers are formed by a combination of a punching process into an appropriate shape, a drawing process, and an edge cutting process, and a large number of containers formed in this way are cut in a certain direction with the end face where the raw metal is exposed in the edge cutting process. While continuously feeding the large number of containers, a coating of a decorative material such as a heat-drying paint, an ultraviolet curing paint, or an electron beam curing paint is sequentially applied to the exposed surface in a continuous coating process. It consists in coating and forming.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings.

That is, as shown in FIG. 1(A), a circular raw metal plate 3 with a decorative layer 2 formed on the entire surface of the metal plate 1 is prepared by forming the decorative layer 2 on a disc in advance or by forming a large plate. It is then shaped using a punching process.

For example, when the metal plate 1 is made of aluminum, the decorative layer 2 is formed by applying a decorative process such as alumite treatment, a coating process such as a paint film or plating, or a surface treatment such as anti-corrosion treatment. Form.

The raw metal plate 3 thus formed is formed into a container 4 as shown in FIG. 1(B) by a drawing process such as deep drawing. Then, the open end 5 of this container 4 is connected to the raw metal plate 3.
Due to variations in the elongation during drawing and the wrinkle press during deep drawing, it slightly protrudes laterally in a flange-like manner and the tip surface exhibits a wavy shape.

Therefore, in order to maintain the dimensional accuracy and aesthetic appearance of the container 4, the open end 5 is cut off by an end cutting process such as press working to form a finished end surface 6, as shown in FIG. 1(C).

However, since the finished end surface 6 exposes the metal plate 1, which is the material, it will corrode if left as it is, and the container 4 will not be hygienic, aesthetically pleasing, or even strong. It has a negative impact.

Therefore, as shown in FIG. 1(D), in order to form a coating 7 of a decorative material such as a heat drying type paint, an ultraviolet curing type paint, or an electron beam curing type paint on the finished end surface 6, the following two methods were used. This method automatically and continuously applies and hardens the decorative material.

That is, in the first method, as shown in FIG. 2, a large number of containers 4 are arranged with the finished end surfaces 6 facing upward.

Then, while the arranged containers 4 are sent one after another to the stack, ink pads 8 of a size that can cover the containers 4 are successively pressed onto the entire surface of the finished end surface 6 one by one to apply the decorating material.

Thereafter, if the decorative material is a heat-drying paint, heat rays are applied, if it is an ultraviolet curable paint, an electron beam is applied to the finished end surface 6, and the irradiation device 9 sequentially applies a heat ray to the finished end surface 6. The coating [17] is formed by irradiating and curing.

As a result, the coating 7 of the decorative material can be automatically and continuously formed on the finished end face 6, resulting in a significant cost reduction.

In addition, a second method as another method is as shown in FIG.
and the second belt conveyor 11 is arranged so as to be continuous with the first belt conveyor 10, and the second belt conveyor 11 is arranged at an appropriately lower position than the first belt conveyor 10. Then, the belt 1 of the first belt conveyor 10
The decorative material is always applied to the two surfaces from a paint supply container 13 via a supply roller 14.

Therefore, by rotating the first belt conveyor 10, the belt 12 is moved, and the containers 4 are sequentially placed on the surface of the belt 12 with the finished end surface 6 facing downward. Since the surface of 12 is coated with a decorative material, the decorative material adheres to and is coated on the finished end surface 6. Then, the container 4 with the decorative material applied to the finished end surface 6 is transported to the first belt conveyor 1.
0 to be placed on the second belt conveyor 11. Further, when the container 4 is moved from the first belt conveyor 10 onto the second belt conveyor 11, the container 4 is reversed so that the finished end surface 6 faces upward.
The second belt conveyor 11 is arranged at a lower position with respect to the first belt conveyor 10 so that the container 4 is placed on the container 1, and if necessary, an auxiliary device (not shown) for inverting the container 4 is provided. I will attach it. The container 4 placed on the second belt conveyor 11 with the finished end surface 6 facing upward is moved under the above-mentioned irradiation device 9 by the belt 15 of the second belt conveyor 11, and the finished end surface 6 is coated. The coating 7 is formed by curing the decorative material by irradiating it with heat rays, ultraviolet rays, or electron beams. As a result, similarly to the first method, the finished end face 6 is coated with the decorative material vA.
7 can be formed automatically and continuously, resulting in significant cost reduction.

Note that the step of continuously applying and forming the coating 7 of the decorative material on the finished end surface 6 is not limited to the first method and the second method described above, but can be a continuous and automatic step. Needless to say, any method is fine.

Since the container 4 thus formed uses the raw metal plate 3 that has been decorated in advance, the surfaces other than the finished end surface 6 are elegant and have excellent corrosion resistance. Since the coating 7 of the decorative material is also formed on the finished end face 6, there is no exposed surface of the material metal of the container 4 itself, making it possible to form a container 4 with excellent corrosion resistance. Moreover, by making the color of the coating 7 of the decorative material the same as the color of the surface of the raw metal plate 3, an overall unified beauty can be created. If the color of the coating 7 is different, on the contrary, the finished end surface 6 becomes an accent and creates a very elegant color.

Since this container 4 uses a pre-decorated raw metal plate 3, it is not necessary to decorate the entire body after molding, and only the finished end face 6 needs to be decorated. Since the decoration is performed automatically and continuously, the cost can be reduced, so it can be provided at a very low cost.

[Effects of the Invention] Constructed as described above This invention uses a raw metal plate 3 whose entire surface has been previously subjected to a surface treatment such as a decoration process, a coating process, or an anti-corrosion process. The containers 4 are formed by a combination of a process of punching into an appropriate shape, a drawing process, and an end cutting process, and the end faces of a number of containers thus formed with the raw material gold layer exposed in the end cutting process are While arranging the containers in a certain direction and continuously feeding the containers, heat-drying paint,
A raw metal plate 3 whose surface is decorated before forming a container 4 by sequentially applying and forming a coating 7 of a decorative material such as an ultraviolet curable paint or an electron beam curable paint in a continuous coating process. Because we are using , the decorative material after molding is applied only to the exposed surface due to the edge cutting process, and this surface is lined up in a certain direction and the decorative material is applied one by one in a continuous coating process. Since there is no exposed surface of the material metal and the cost of the coating process can be reduced, an inexpensive container 4 with excellent corrosion resistance can be provided.

Moreover, since the metal plate 3 that has been decorated in advance is used, the color of the surface other than the exposed end surface is very elegant, and this end surface is also coated with a decorative material. Therefore, if the color of the decorative material is the same as that of the material metal plate 3, a unified beauty can be created as a whole, but if the color of the surface of the material metal plate 3 and the color of the decorative material are different. If you do this, on the other hand, this edge part will become an accent and create a very elegant color.

In other words, conventionally, pressing processes such as the process of punching metal sheets, drawing processes, and edge cutting processes have been automated to the maximum level in an effort to reduce costs, but the decoration process and painting process have lagged behind in automation. However, by eliminating these drawbacks, we were able to reduce the overall cost and provide a more elegant container 4. It is what it is.

In addition, the decorative material is not limited to the paint mentioned above,
Needless to say, other paints may also be used.

As explained above, according to the present invention, it becomes possible to automatically and continuously mold containers that are very elegant in color and have excellent corrosion resistance, thereby reducing the cost of container molding and reducing the cost. It has excellent effects such as being able to provide

[Brief explanation of the drawing]

The drawings show examples of the present invention, and FIG. 1 is a process diagram showing the container forming process, FIG. 2 is a schematic diagram of the decorating material application process, and FIG. It is a schematic diagram showing an example. DESCRIPTION OF SYMBOLS 1... Metal plate, 2... Decoration layer, 3... Material metal plate, 4... Container, 5... Open end, 6... Finished end surface, 7... Coating, 8 °... Ink pad, 9... Irradiation device, 10... First belt conveyor, 11... Second
Belt conveyor, 12... Belt, 13... Paint supply container, 14... Supply roller, 15... Belt. Patent applicant: Fukuda Metal Crafts Co., Ltd. (A) (C) (B) CD)

Claims (1)

[Claims] 1. A process of punching and drawing into an appropriate shape using a raw metal plate whose entire surface has been previously subjected to a surface treatment such as decoration, coating, or anti-corrosion treatment. A container is formed by a combination of the step and the edge cutting step, and a large number of containers thus formed are arranged with the end surfaces with exposed metals exposed in the end cutting step facing in a certain direction, and the large number of containers are While continuously feeding the exposed surface,
A method for producing a metal container, comprising sequentially applying and forming a film of a decorative material such as a heat-drying paint, an ultraviolet-curing paint, or an electron beam-curing paint in a continuous coating process. 2. The method of manufacturing a metal container according to claim 1, wherein the coating step includes sequentially applying the decorative material using an ink pad to the exposed surface of the raw metal of the container being sent and curing it. 3. In the coating process, the containers 4 are sequentially placed on the moving belt with the decorative material continuously applied to the surface, with the side with the exposed metal facing downward; The method for manufacturing a metal container according to claim 1, wherein the decorative material attached to the exposed surface is continuously cured.