System for forming stacks of composite materials

A system for forming stacks of composite material comprising:

• a base with at least one longitudinal mandrel element on its upper face, comprising a shape to be given to a stack of composite material which is arranged on the mandrel element for obtaining a shaped and formed stack of composite material;
• and
• at least one pressure rolling forming device assembled in a supporting device and configured to be placed in at least one position in which it rolls over an unformed stack of composite material thereby pressing the composite material against the mandrel element for simultaneously forming the stack of composite material and shaping the stack of composite material, wherein the pressure rolling forming device comprises a hollow forming cover made of flexible material with a tread, and the hollow forming cover includes air at a fill pressure which allows the tread to elastically adapt to at least part of the mandrel element and exert a controlled pressure on the stack of composite material against the mandrel,
• wherein the hollow forming cover includes a plurality of particles which allow the tread to elastically adapt to at least part of the mandrel element and exert a controlled pressure on the stack of composite material, wherein said particles are sufficiently heavy such that particles act gravitationally on the hollow forming cover and are deposited in the area to be formed, wherein the particles cause the effect of allowing the cover to form the stack as a result of the pressure generated by the actual weight of respective particles.