Why are Toyo Steel boxes pressed from a single piece of steel?
Why are Toyo Steel boxes pressed from a single piece of steel?
At first glance, this is one of those things you can easily overlook about the box. In many Toyo Steel models, the body has no welds or joints at the corners. It is formed from a single piece of sheet steel. This very construction lies at the beginning of the brand's history. In 1969, Toyo Steel developed deep-drawing technology that made it possible to create a seamless steel toolbox from a single sheet. The principle is still used today. And it is not merely a manufacturing detail. It affects the box's strength, shape, and appearance.
TL;DR
Single piece of sheet steel / the body has no welded corners
Deep drawing / the sheet acquires a three-dimensional shape through pressing
Seamless construction / no joints at the body corners
Since 1969 / the technology has been at the very origins of Toyo Steel
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A three-dimensional shape formed from flat sheet metal
The starting material is sheet steel. During deep drawing, its flat section is pulled into the required three-dimensional shape using a tool. The result is not several walls that are subsequently joined together. The bottom, sides, and rounded corners form one continuous piece of material. Toyo Steel describes this construction in its boxes as “pressed from a single steel plate and seamless”.
Models manufactured in this way include:
T-150 · T-152 · T-190 · T-192 · T-320 · T-350 · T-360 · Y-280 · Y-350 · Y-410
Why are there no welds at the corners?
With an assembled construction, the individual parts of the material have to be joined somewhere. Deep drawing makes it possible to create a body without such joints. This has a practical consequence: no weld or other joint is formed at the body corners that would create a separate structural point. The box's strength therefore comes not only from the thickness of the material, but also from the way the steel itself is formed. Toyo Steel lists low weight, durability, and functionality among the characteristics of this construction.
Rounding is not just a matter of appearance
The characteristic soft corners of these boxes are not an additional stylistic element added to a finished case. They result from the way the sheet metal is formed. And that is precisely what we find interesting about Toyo Steel. Appearance is not separate from construction. The rounded corners, pressed details, edges, and overall simplicity of the box arise from the requirements of the material and the manufacturing process. That is why Toyo Steel seems more interesting to us as an industrial product than as a “design storage box”.
A technology older than its current use
Today, Toyo Steel boxes end up on workbenches, in studios, homes, or offices. The brand's origins, however, are significantly more industrial.
Toyo Steel was established in 1969 as a manufacturer of professional industrial products, and the seamless toolbox made from a single piece of sheet steel was one of the technologies on which the company built its position. The manufacturer has been using this construction for more than half a century.
And perhaps that is precisely why these boxes work outside the workshop as well. They were not created as design objects meant to look industrial. Their appearance is a consequence of how they were made. To us, that is considerably more important than the “Made in Japan” label itself.
FAQ
What does it mean that Toyo Steel is seamless?
In seamless models, the body is formed from a single piece of sheet steel and has no welded joints at the corners. Toyo Steel uses the designation seamless for this construction.
What is deep drawing?
Deep drawing is a method of forming sheet metal in which a three-dimensional shape is created from flat material. The development of this technology for the seamless Toyo Steel toolbox dates back to 1969.
Are all Toyo Steel boxes made from a single piece of steel?
No. This construction applies to specific models and their pressed bodies. Toyo Steel also makes more complex boxes assembled from multiple parts.
Even with seamless models, of course, “made from a single piece of steel” does not mean that the entire finished box is made from one piece of material. The body is formed from a single sheet. The box may contain additional parts, such as a hinge, handle, or closing mechanism.
Which Toyo Steel boxes are pressed from a single piece of steel?
In our range, these are the T-150, T-152, T-190, T-192, T-320, T-350, T-360, Y-280, Y-350, Y-410, and Parts Box M-8 models.