Portable machine for cutting pieces of composite material

A portable machine for cutting pieces of composite material, comprising:

• a compression module comprising a top row provided with one or more top rollers and a bottom row provided with two or more bottom rollers, wherein the top rollers are coupled to an actuator operatively coupled to a mechanism configured to vertically move said top rollers, thereby compressing the pieces composite material intended to be cut, and furthermore configured to rotate said rollers, so that, in operation, the piece of composite material is moved tangentially to said rollers,
• a cutting module arranged after the compression module, comprising at least one cutting element configured to cut the compressed piece of composite material,
• said portable machine wherein at least one top roller is vertically offset with respect to a bottom roller adjacent to the same, the offset angle being comprised between 45°±15° at the end of the vertical movement during compression of the pieces intended to be cut, such that the piece of composite material is compressed by the rollers in a direction that is substantially perpendicular to the direction of the fibers, fracturing and breaking the fibers before the cut is made in the cutting module.