Counter-die for the cylinders of rotary die cutting machines
A counter-die includes a tubular body, divided into several parts ( 1 - 1′ - 1 ″) and joined to each other by tongue and groove joints using twisted edges ( 2 ) at the ends, preferentially three parts, these having an inner sector ( 3 ) which is the largest, of injected plastic, very resistant and light, over the exterior surface of which there is a coating ( 4 ) of polyurethane. The parts are joined to each other by orifices ( 7 ) and grooves ( 8 ) in their ends, more specifically in the area made of injected plastic, through which respective rods or pins ( 11 ) pass.
1. A counter-die for cylinders of a rotary die-cutting machine to cover a cylinder on which the die acts, comprising:
a tubular body, divided into a plurality of parts fitted together using tongue and groove joints, in sets of three, the plurality of parts having an inner sector of injected plastic, which is the largest of the parts; an exterior face of the tubular body is coated in polyurethane, wherein the parts include a quick connection;
said parts having bent edges on ends for connecting the parts to each other, and said quick connection includes through orifices that act on protruding edges formed by a bent edge on one end of an intermediate sector of injected plastic, and “L” shaped grooves having a first section and an elbow in protruding edges of an opposite end, being configured so that when configured for assembly, the grooves are opposed to the orifices;
respective fixing rods passing through the orifices and grooves for coupling.
2. Counter-die for the cylinders of rotary die-cutting machines, according to claim 1 , wherein the intermediate sector, made from injected plastic, has on an inner surface a plurality of sunken areas to make the intermediate sector lighter, the inner surface forming brackets.