Method for cutting block materials and cutting machine for cutting block materials
AssigneeFecken-Kirfel GmbH & Co. KG
InventorsMichael Tillmann, Helmut Toennes, Ludger Weingaertner
Life of this patent
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Abstract
A method for the cutting of block materials, particularly foamed or expanded materials, wherein a knife element having first and second ends is driven in a translatory manner in longitudinal direction so as to perform a reciprocating movement. The driving force is exerted on the first and second end of the knife element, the driving of the first end of the knife element being performed by conversion of a first rotary movement into a first translatory movement, and the driving of the second end of the knife element being performed by conversion of a second rotary movement into a second translatory movement in a sense opposed to that of the first translatory movement.
Claims16
A method for cutting block materials, wherein a knife element having a first and a second end is driven by a driving force in a translatory manner in a longitudinal direction for performing a reciprocating movement, the driving force being exerted on the first and second ends of the knife element, the driving of the first end of the knife element being performed by conversion of a first rotary movement into a first translatory movement, and the driving of the second end of the knife element being performed by conversion of a second rotary movement into a second translatory movement in a sense opposed to that of the first translatory movement, a first rotational frequency of the first rotary movement with respect to full revolutions being equal to a second rotational frequency of the second rotary movement, it being provided that, per revolution of the first and second rotary movements, the first rotary movement has a higher angular speed in a first and a second partial range of the revolution than the second rotary movement, and in a third and a fourth partial range of the revolution, the second rotary movement has a higher angular speed than the first rotary movement, and that, at the start and respectively the end of a revolution and at the transition between the second and the third partial ranges of the revolution, the first and second rotary movements have an identical angular speed.
A cutting machine for the cutting of block materials, said cutting machine comprising a machine frame, a knife element having a first and a second end, a guide means for guiding the knife element in a longitudinal direction of the knife element, and first and second drive units, the first drive unit being coupled to the first end of the knife element, and the second drive unit being coupled to the second end of the knife element, the first or the second drive unit being arranged on a tensioning means provided for setting the tension of the knife element, wherein the first and second drive unit each comprise a servo motor and an eccentric disk with a pushrod, said disk being coupled to the respective servo motor, and the first and second ends of the knife element having a respective one of said pushrods connected to it, and a common control unit is operative to control the servo motors of the first and second drive units, said control unit being operative to control a rotational frequency of the servo motors synchronously with respect to full revolutions, and, during a revolution of the servo motors, to decelerate and again accelerate at least one of the servo motors in such a manner that, in a first and a second partial range of the revolution, the servo motor of the first drive unit has a larger angular speed than the servo motor of the second drive unit and, in a third and a fourth partial range of the revolution, the servo motor of the second drive unit has a larger angular speed than the servo motor of the first drive unit.
Dependencies are inferred from the claim text.