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.

Abstract: A cutting machine including an endless band knife, the band knife being guided in opposed directions in a revolution zone of the band knife forming a cutting zone, and including a first and a second deflecting device for deflecting and returning the band knife. The first and the second deflecting devices each deflect and return the band knife without a reverse bending cycle.

Abstract: A cutting machine including an endless band knife, the band knife being guided in opposed directions in a revolution zone of the band knife forming a cutting zone, and including a first and a second deflecting device for deflecting and returning the band knife. The first and the second deflecting devices each deflect and return the band knife without a reverse bending cycle.

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.

Abstract: The method provides that, in an initial peeling phase (AP), the material block is started to be peeled in a spiral shape. This is followed by a transition phase (UP) of a fraction of a turn so as to change to the set layer thickness. In the subsequent peeling phase (SP), the work is done with the same spiral pitch as in the initial peeling phase. During each turn of the material block, the knife is sunk further into the material block within a limited angular range and thereafter the turn is completed with the pitch of the initial peeling phase. Advantages are achieved by the fact that the set layer thickness is reached within fractions of a turn. The method can be executed with little expenditure of time and little waste of material.