Profile grinding is a process in which a workpiece is overlayed optically onto a desired shape (a profile) and then ground according to the profile using a fine grinding stone. Also known as “copy grinding”, this process is an extremely powerful technique in the precision machining of molded parts.

It has been said that profile grinding is inferior to form grinding when measured in terms of surface roughness. However, the combination of the most advanced CNC profile grinding machines and our distinctive machining techniques has made possible machine-based mirror surface grinding with a polish-less surface quality of less than Ry0.2μm.

This method prevents the generation of powder and sand-burning at the time of press work as well as enhancing the quality of pressed products and increasing the working life of the molds used.

Furthermore this method contributes to reducing the environmental load on the earth because it does not use blanking oil for presswork and accordingly eliminates the need for cleaning processes using CFCs, etc.

A Thompson punch equipped with a blade of a predetermined shape (usually a Thomson blade) is used for punching and cutting materials such as paper or film, and the mold for punching is generally called a die.

A die is usually created by attaching a Thomson blade to a base made of plywood, etc. Our Thomson punch employs an integrated blade, which is cut out of a baseboard of quenched metal.

With a hardness of HRC56 or more, this blade has a very long life and stays sharp. Also, by using a high-speed machining center, the shape and height of the blade can be machined with micrometer precision.

Using this integrated-type Thomson punch attached to a progressive die, extremely fine punching can be performed.