The invention relates to a driven mixer (10) comprising a first chamber (12) configured to store a first component and a second chamber (14) configured to store a second component, the first chamber and the second chamber being connected to each other by a passage (16), with the first and second chambers at least in an initial configuration of the driven mixer being separated by a barrier (18), the barrier being arranged to close off a flow path between the first and second chambers, the driven mixer further comprising a mixing member (20), the mixing member being drivable about an axis of rotation, partly extending into the second chamber and having a coupling section (22) disposed outside the second chamber and configured to be drivingly coupled to a motor, wherein the first chamber has an initial storing capacity in the initial configuration of the driven mixer, wherein the driven mixer is configured to be brought into an activated configuration in which the first chamber has a reduced storing capacity smaller than the initial storing capacity, so that when the driven mixer is brought from the initial configuration into the activated configuration at least part of a content of the first chamber overcomes the barrier and is displaced into the second chamber, and wherein, at least in the initial configuration, the second chamber is arranged between the first chamber and the coupling section of the mixing member with respect to the axis of rotation.L'invention concerne un mélangeur entraîné (10) comprenant une première chambre (12) configurée pour stocker un premier composant et une seconde chambre (14) configurée pour stocker un second composant, la première chambre et la seconde chambre étant reliées l'une à l'autre par un passage (16), les première et seconde chambres au moins dans une configuration initiale du mélangeur entraîné étant séparées par une barrière (18), la barrière étant agencée pour fermer un chemin d'écoulement entre les première et seconde chambr
