Method for producing a pellet from powdered material

摘要

The invention relates to a method for producing a pellet from powdered material with the method steps: during a pressing process, a tipping of the upper and/or lower force transmission bridge and/or the upper and/or lower die plate and/or a force causing this tipping is measured; depending on the determined measurement results, the upper drive units and/or the lower drive units are moved asynchronously in relation to each other during the pressing process such that the caused tipping is compensated.

主权项

1. A method for producing a pellet from powdered material in a press, which comprises the following characteristics:
pressing unit arranged in a press frame with at least one upper pressing die arranged on an upper die plate (22) and/or at least one lower pressing die arranged on a lower die plate (24) as well as at least one receiver for powdered material to be pressed by the upper and/or the lower pressing die, at least two upper drive units for moving the upper pressing die in the vertical direction, wherein the upper drive units comprise respectively an upper electric drive motor (30, 31) and an upper spindle drive driven by the respective electric drive motor (30, 31) with an upper spindle (34, 35) and an upper spindle nut (36, 37), and/or at least two lower drive units for moving the lower pressing die and/or the receiver in the vertical direction, wherein the lower drive units comprise respectively a lower electric drive motor (42, 43) and a lower spindle drive driven by the respective electric drive motor (42, 43) with a lower spindle (44, 45) and a lower spindle nut (50, 51), wherein the upper drive units act on the at least one upper pressing die via an upper force transmission bridge (38) extending in the horizontal direction and/or wherein the lower drive units acts laterally offset on the at least one lower pressing die and/or the receiver via a lower force transmission bridge (52) extending in the horizontal direction, and wherein at least one upper compensation element is arranged respectively between the upper spindle nuts (36, 37) and the upper force transmission bridge (38), and/or wherein at least one lower compensation element is arranged respectively between the lower spindle nuts (50, 51) and the lower force transmission bridge (52), characterized by the method steps during a pressing process, a tipping of the upper (38) and/or lower force transmission bridge (52) and/or the upper (22) and/or lower die plate (24) and/or a force causing this tipping is measured, depending on the determined measurement results, the upper drive units and/or the lower drive units are moved asynchronously in relation to each other during the pressing process such that the caused tipping is compensated.