Device for the homogenisation of plastics material melts, comprising - a housing, - at least one housing channel (14, 15) for a plastics material melt to be homogenised, -- which is formed in the housing and -- which extends from a feed opening to a discharge opening, - a homogenising element comprising a plurality of flow channels (S 1 to S n) for the plastic material melt to be homogenised, -- wherein each of the flow channels (S 1 to S n) has a length (L 1 to L n) defined in a channel longitudinal direction and a cross sectional area (A 1 to A n) defined transverse to the channel longitudinal direction and a cross sectional shape (Q 1 to Q n), -- wherein the device is configured as a screw machine, - wherein at least one treatment element shaft (16, 17) is arranged in the at least one housing channel (14, 15), the treatment element shaft (16, 17) being rotatably drivable about an associated rotational axis (19, 20), - wherein the at least one treatment element shaft (16, 17) comprises at least one shaft (31, 32) on which treatment elements (33, 34, 35, 36, 39, 40) are non-rotatably arranged consecutively, - wherein the homogenising element is arranged between the feed opening and the discharge opening of the screw machine, - wherein the homogenising element extends in the at least one housing channel (14, 15) and is passed through by the at least one treatment element shaft (16, 17), characterized in that at least some of the flow channels (S 1 to S n) differ with respect to at least one feature from the group length (L 1 to L n) and cross sectional shape (Q 1 to Q n), and that the at least one cross sectional shape of the flow channels (S 1 to S n) is selected from the group round, oval, drop-shaped and polygonal. - a housing, - at least one housing channel (14, 15) for a plastics material melt to be homogenised, -- which is formed in the housing and -- which extends from a feed opening to a discharge opening, -- which is formed in the housing and -- which extends from a feed opening to a discharge opening, - a homogenising element comprising a plurality of flow channels (S 1 to S n) for the plastic material melt to be homogenised, -- wherein each of the flow channels (S 1 to S n) has a length (L 1 to L n) defined in a channel longitudinal direction and a cross sectional area (A 1 to A n) defined transverse to the channel longitudinal direction and a cross sectional shape (Q 1 to Q n), -- wherein the device is configured as a screw machine, -- wherein each of the flow channels (S 1 to S n) has a length (L 1 to L n) defined in a channel longitudinal direction and a cross sectional area (A 1 to A n) defined transverse to the channel longitudinal direction and a cross sectional shape (Q 1 to Q n), -- wherein the device is configured as a screw machine, - wherein at least one treatment element shaft (16, 17) is arranged in the at least one housing channel (14, 15), the treatment element shaft (16, 17) being rotatably drivable about an associated rotational axis (19, 20), - wherein the at least one treatment element shaft (16, 17) comprises at least one shaft (31, 32) on which treatment elements (33, 34, 35, 36, 39, 40) are non-rotatably arranged consecutively, - wherein the homogenising element is arranged between the feed opening and the discharge opening of the screw machine, - wherein the homogenising element extends in the at least one housing channel (14, 15) and is passed through by the at least one treatment element shaft (16, 17), characterized in that at least some of the flow channels (S 1 to S n) differ with respect to at least one feature from the group length (L 1 to L n) and cross sectional shape (Q 1 to Q n), and that the at least one cross sectional shape of the flow channels (S 1 to S n) is selected from the group round, oval, drop-shaped and polygonal.