Multilayer dose having a concave surface, process for making said multilayer dose and device for manufacturing said multilayer dose

Is moulded method for preparing product multi-layer a shaft of symmetry's multiple material, comprising a first synthesized resin and is wrapped, is arranged in the first resin with a horizontal 3 to electronic, wherein the horizontal 3 mm less than the material coil 20%, wherein of the multiple material, the layer (3) is formed a shaft of symmetrically solid of revolution shell, and capable of changing the horizontal to the distance of shaft of symmetrically.