JPH07308724A - Manufacture of d type container made of thin metallic sheet - Google Patents

Abstract

PURPOSE:To enable the manufacture of a D type container made of a shin material and a small D type container to be carried out by forming the side surface of a part of a first container into a plane shape by crushing after manufacturing the first container in a round type bowl shape. CONSTITUTION:The D type container is manufactured with a shin stainless steel sheet by spinning a main body part 11 and a rolled-up edge part 12. Next, a part of the side surface of a first container lz is crushed toward the center of the container from the lateral direction by using a press device, a crushed part 21 is formed in a plane shape, and the whole is made in a D type bowl shape (second container 2). The rolled-up edge part 22 of the second container 2 is supported by a proper supporting bench, and a projected part 23 is formed to a flat by a forming die to manufacture a specified D type container 2a. Therefore, since spinning for a square type container in which a roundness at a corner is small, and the material of a curved side part is easy to come short, is not necessary, the whole can be manufactured with a material sufficiently thinner than that used for a conventional D type container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a thin metal plate container having a flat peripheral surface and a D-shape in plan view.

[0002]

2. Description of the Related Art A thin metal plate container is a container used as a kitchen utensil such as a bowl or a washing tub, and is mainly made of a stainless steel thin plate, and a round type and a D type are generally known. The round ball-shaped container is a so-called bowl type and is formed by pressing or spatula drawing, but spatula drawing is often used in consideration of the use of a thin material. On the other hand, since the D-shaped container is not symmetrical in shape, it is generally produced by press drawing.

[0003]

By the way, the D-shaped container is more convenient to use in the sink of the kitchen than the round ball-shaped container because the D-shaped container is provided with the flat side wall portion. Since it is an asymmetric type, a material having a certain thickness must be used so that wrinkles and cracks do not occur when forming a container portion by press deep drawing. Therefore, not only the material cost but also the press die becomes complicated,
The cost of pressing is also higher than that of a round ball-shaped container. Therefore, the present invention proposes a means for manufacturing a D-shaped container made of a thin metal plate using a thin material.

[0004]

According to the method of manufacturing a D-shaped container made of a thin metal plate according to the present invention, after a round ball-shaped first container is once produced, a part of its side surface is directed from the lateral direction toward the center. It is characterized in that it is formed into a flat shape by being crushed by a pressing press process.

[0005]

Since the round ball-shaped first container itself is symmetrical, spatula drawing can be performed, and production by pressing using a thin material is easy. Therefore, once a round ball-shaped first container is produced with a thin material, and a side surface of the first container is crushed inward to form a flat surface, a D-shaped container is formed as a whole.

[0006]

EXAMPLES Next, examples of the method of the present invention will be described.
The method of the present invention comprises a first step of producing a round ball-shaped first container, a second step of transforming the round ball-shaped first container into a D-shaped container to form a second container, and a second container. Is composed of a third step of shaping and shaping into a predetermined shape.

In the first step, the first container 1 similar to a normal round ball is produced, and the main body portion 11 is the same as before.
And the rolled edge portion 12 is produced from a thin stainless steel plate by a spatula drawing process. The press drawing process may be adopted instead of the spatula drawing process.

The next second step is the partial side surface 1 of the first container 1.
3 is crushed from the lateral direction toward the center using the press working device A (see FIG. 2), and the crushed portion (side surface of container) 21
To form a D-shaped ball (second container 2) as a whole (see FIG. 3).

Next, the third step is carried out. In the third step, the crushed side surface portion 21 of the second container 2 is used.
However, since this is a drawing process, a part of the shape is projected upward, and the projecting portion 23 is corrected. That is, the winding edge portion 22 of the second container 2 is attached to an appropriate support base B.
The projection portion 23 is flatly shaped by the shaping die C to produce a predetermined D-shaped container 2a.

Therefore, compared with the case where a D-shaped container is produced from a flat plate by deep-drawing press working, there is no need to perform the drawing work for a rectangular container, which has a small roundness at the corners and the material of the curved side is apt to be insufficient. The entire product could be manufactured from a material sufficiently thinner than the conventional D-type container. In addition, since the first container is the target shape, compared to the conventional polishing finish after producing the D-type container, a temporary polishing finish can be easily performed at the time of the first container. The polishing finish after production is simple and has a good advantage. of

The present invention is not limited to the above-mentioned embodiment, and the present invention is not limited to the round ball-shaped first container.
It is only necessary to form a part of the peripheral surface into a flat plate shape by crushing, and the specific configuration of the round ball-shaped first container producing means, the pressing device used in the crushing step, etc. is arbitrarily determined. It is a thing.

[0012]

As described above, according to the present invention, once a round ball-shaped first container is produced, a partial side surface of the first container is crushed to form a flat surface to produce a D-shaped container. Since it does not require the deep drawing of the rectangular container which requires a material of a suitable thickness, it is possible to manufacture a D-shaped container and a small D-shaped container made of a thin material.

[Brief description of drawings]

FIG. 1 is an explanatory view of a manufacturing process of an embodiment of the method of the present invention.

FIG. 2 is an explanatory diagram of the second step.

FIG. 3 is a front view showing the second container (a),
(B) is a plan view.

FIG. 4 is an explanatory diagram of the third step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st container 11 main-body part 12 winding edge part 13 side surface part 2 2nd container 21 crushing part 22 winding edge part 23 protrusion part 2a D type container (product)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B21D 53/00 Z B65D 1/14

Claims (2)

[Claims] 1. A round ball-shaped first container made of a thin metal plate is produced, and then a part of its side surface is crushed by a pressing press working from the lateral direction toward the center to form a flat surface. Method for producing thin metal plate D-shaped container 2. A round ball-shaped first container having a winding edge portion is produced by an ordinary spatula drawing process, and then a side surface of the container is crushed by a pressing press process from the lateral direction toward the center to produce the first container. Manufacture of a D-shaped container made of a thin metal plate, characterized in that a second container having a D-shape in plan view is produced by partially forming a side surface and then the upper edge winding edge is shaped. Method