Method and device for impregnating at least one fibre material

An impregnation apparatus for impregnating at least one quasi-continuous fiber material with a plastics material which has been melted at an appropriate process temperature, comprising:

• at least one fiber feed channel with a fiber introduction means to feed the quasi-continuous fiber material to the impregnation apparatus,
• at least one plastics feed channel with a plastics introduction means that is separate from the fiber introduction means to feed the plastics material to the impregnation apparatus separately from the fiber material, wherein the at least one fiber feed channel and the at least one plastics feed channel are separate at least in sections and open into a common impregnation cavity in order to impregnate the quasi-continuous fiber material with the fed and melted plastics material, and
• a backflow-preventing region, in which the at least one fiber feed channel at least in sections has an S-shaped course which is formed by first and second curvatures with opposite directions of curvature, between which the at least one fiber feed channel is brought together with the at least one plastics feed channel, so that a common channel section is then formed,
• wherein the first and second curvatures of the at least one fiber feed channel are configured adjacent to each other such that the fiber material at the first curvature is guided with contact along a first inner side of the at least one fiber feed channel and at the second curvature is guided with contact along a second inner side of the at least one fiber feed channel opposite the first inner side,
• wherein the at least one plastics feed channel opens into the at least one fiber feed channel at the first inner side of the at least one fiber feed channel between the first and second curvatures in order to block the at least one fiber feed channel with the fiber material starting from a junction into the at least one fiber feed channel against the feed direction.