Since its establishment in 1958, Matsunaga has been single-minded in its pursuit of deep drawing technology. After almost half a century, we are now at the point where we can handle processing tasks in which materials are drawn out to a length of 500mm or more.
By skillfully combining technologies that improve the capabilities of deep drawing according to the type of material and the product form, our unique expertise makes it possible to manufacture many types of forms that have hitherto been considered impossible to create using industrial processes. These technologies include the multi-stage draw forming, opposed hydraulic forming, warm forming and reverse draw forming methods.
Using the opposed draw forming method, a drawing ratio of 2.8 or more can be aachieved. This method involves using a water tank as an internal mold, applying hydraulic pressure to the material being drawn, then forming by pressing the material using a punch. With hydraulic pressure, the force is applied to the material at right angles to the direction of pressing. So as the material is being pressed down it comes under tension. This results in an increase in frictional force, making possible processing in excess of what the material’s inherent strength can bear.
In addition, this method can be used to apply compression to the material from the punch side direction, which makes it very effective in forming complicated shapes.
For the future, Matsunaga is aiming at further improvement of its deep draw processing technology and proposing smart manufacturing requiring little or no welding.
MATSUNAGA CO., LTD. 
