For saving of time and effort during replacement of soiled filter plate locked onto a seal cover of a core shooter, the filter plate is placed on a gas chamber after releasing the lock and by its lateral outward motion from the core shooter is engaged with a receptacle of a tilting plate holder. A subsequent retraction of the gas chamber without the filter plate into the core shooter clears the path for tilting of the plate holder and with it positioning of a second receptacle carrying a cleaned filter plate into the vacant position. A renewed to-and-fro motion of the gas chamber serves the acceptance of the cleaned filter plate and its retraction to the seal cover of the core shooter, in order to lock the plate to the cover.