Importance

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Abstract

The objects is to rapidly position and fix a blade swivel to a knife cylinder in a rotary die cutter and to abate abrasion of the inner end of an extrusion member that is brought into contact with an extruding unit. A wooden pattern 22 in which a punching blade 20 is embedded is installed to a blade swivel 18. A knife cylinder 16 includes first penetrating holes 76 accommodating first extruding pins 74 while the blade swivel 18 includes a second penetrating holes 80 accommodating second extruding rod 82. The first extruding pin 74 can be brought into contact with the second extruding rods 82, and an eccentric cylinder 72 extrudes the first extruding pins 74 to further extrude a punched chip a sandwiched between a punching blade 20. At the inner opening of each second penetrating hole 80, a recess groove 98 is formed along the axis direction of the knife cylinder. This configuration prevents the first extruding pins 74 from hitting the blade swivel when the blade swivel 18 moves along the axis direction of the knife cylinder when the blade swivel 18 is to be installed.

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First Claim