Precision at high speeds: Quality assurance with PMX
The more precisely powder presses can apply force, the higher the quality of the produced molded parts. The pressure must be accurately measured for exact control. Dorst Technologies has elected to use HBM's PMX amplifier platform which has been specially developed for industrial use, to design a new series of powder presses.
The customers of Dorst Technologies, a leading supplier of machines and systems for the production of ceramic and powder metallurgical products, include automotive suppliers, ceramics producers, tool manufacturers and medical technology companies. The new EP 70 M model, a 70 tonnes strong servo-motor driven powder press, presses iron metal powder, for instance, into a solid product such as a gearwheel.
"It is important in this production process that the individual segments of, for example, a gearwheel - hub, web, tooth - all have the same density. The better this occurs automatically, the higher the quality of the molded part", explained Herbert Gröbl, development head of control technology at Dorst Technologies. The density distribution is important because the parts are only sintered - a special type of heat treatment - after pressing, Cracks may occur in the molded part affecting its function if the density distribution varies.