Multiple-jig foaming apparatus and relative foaming method

A foaming apparatus (S) for products having sandwiched components, comprising:

• a fixed frame (T) on which a first containment jig (1) is supported,
• at least one foaming unit, and
• a loading trolley (20) provided with a controlled conveyor (21) for transferring said components from an inlet line (Li) inside said containment jig (1), and further including
• at least a second containment jig (10) arranged above said first containment jig (1) constrained to the same fixed frame (T),
• a removal trolley (30) arranged on the side opposite said loading trolley (20) with respect to said containment jigs (1, 10), between said containment jigs (1, 10) and an outlet line (Lu), characterized in that
• said loading trolley (20) and removal trolley (30) are vertically independently movable on said fixed frame (T), by means of respective controlled lifters (22, 32), between a lower position and one or more service positions in which they are arranged adjacent to an inlet and outlet side of said jigs (1, 10) respectively.