Process for manufacturing a headliner for the interior of an automobile and installation for use in the process

The invention refers to a process for manufacturing a headliner for the interior of an automobile and comprises the steps of: introducing at least one layer intended for constituting a support and one lining layer (200) in a press (300); applying pressure and heat on the layers and thus obtaining an assembly of layers joined to one another; cutting the support (100) such that a surplus portion (102) of the support is separated from a main portion (101) of the support; applying a hot fluid on the lining layer in the area in which it is adhered to the surplus portion of the support; separating the surplus portion (102) of the support from the lining layer (200); covering a trimmed edge (101 a) with the lining layer (200). The invention also refers to a machine or installation useful in this type of process.