Process for forming the stack of metallic laminations for the stator of an eletric motor and the stack of metallic laminations

A process for forming the stack of metallic laminations for the stator of a linear motor, from a plurality of overlapped metallic laminations (11), which are annular, mutually concentric and each provided with a plurality of orifices (14) axially aligned with respective orifices of the other metallic laminations (11), in order to define axial housings (15) along the height of the lamination stack (10), said process being characterized in that it comprises the steps of:

• a—molding, in each axial housing (15);
• a respective insert (20) in a non-conductive material, occupying the whole volume of said axial housing (15);
• b—heating the lamination stack (10) to a determined minimum temperature for producing the cure of the non-conductive material of the inserts (20);
• and c—hardening each insert (20) molded inside the respective axial housing (15), in order to lock said metallic laminations (10) against rotational and mutually relative displacements parallel and transversal in relation to the longitudinal axis of the lamination stack (10).