The system (1) has cartridges (30) arranged parallel to each other, and a mixing space (20) with an outlet opening (22). Each cartridge comprises an opening (40) in a cartridge wall (32). A feed plunger (62) is provided for expelling starting components of a mixing ware out of the cartridges through the openings. A closure (60) is arranged in the mixing space so as to close the openings of the cartridges in an initial position, where the openings are partially opened to the mixing space in an end position of the closure. The closure is shifted from the initial position to the end position.
