The invention relates to improvements in the technical field of feeding solid materials to mixing devices. For this purpose, the solid-material feeding device, inter alia, is proposed. The solid-material feeding device comprises the slide, which can be moved between a first end position and a second end position through a conveying connection, which is arranged between a funnel and a solid-material outlet of the solid-material feeding device. By means of the slide, adhesions within the conveying connection can be loosened without having to remove the conveying connection.

There is provided a powder feeder (10, 10′) comprising a main chamber (12, 12′) with a gas inlet (14, 14′) and a powder outlet (16), at least one secondary chamber (20, 20′) configured to receive powder and a shaver element (22, 40, 50), wherein the shaver element (22, 40, 50) is positioned directly above an opening (26, 26′) in the at least one secondary chamber (20, 20′). The secondary chamber (20, 20′) further comprises a piston (28, 28′) movable towards the shaver element (22, 40, 50) so as to urge powder upwards. Examples of a shaver element include a rotatable screw (22), a conveyor belt (40) and a rotating disc (50) with protrusions (54).

The invention relates to improvements in the technical field of feeding solid materials to mixing devices. For this purpose, the solid-material feeding device, inter alia, is proposed. The solid-material feeding device comprises the slide, which can be moved between a first end position and a second end position through a conveying connection, which is arranged between a funnel and a solid-material outlet of the solid-material feeding device. By means of the slide, adhesions within the conveying connection can be loosened without having to remove the conveying connection.