Injection moulding machine for producing fibre-reinforced plastic mouldings

An injection molding machine (1) for producing fiber-reinforced plastic moldings, comprising:

• a closing unit (2);
• an injection unit (3) having a cylinder (4) and a screw (5) that can rotate in the cylinder (4) and be displaced in a longitudinal direction of the cylinder (4), wherein a first opening (8) is provided in the cylinder (4) as a filling opening for feeding in a plastic material to be melted, a second opening (9) is provided in the cylinder (4) downstream from the first opening (8) as a filling opening for feeding in a fiber material, and the screw (5) has a backflow stop (11);
• and
• a mixing part (12) that is connected with the screw (5) in a rotationally fixed manner and co-rotates with the latter, the mixing part (12) being provided downstream from the backflow stop (11) and/or upstream from the backflow stop (11),
• wherein the mixing part (12) has a cylindrical base body (13) with an outer diameter (DM) that is smaller than an inner diameter (Dz) of the cylinder (4), and an annular gap (18) is formed between the base body (13) and an inner cylinder wall (17) of the cylinder (4),
• wherein a plurality of drops (14) as drop-shaped mixing elements (14) are distributed over a periphery of the base body (13) and arranged on a surface of the base body (13) that faces the inner cylinder wall (17), wherein a top view of each drop (14) reveals a longitudinal drop axis (LT), which runs from a pointed end (16) of the drop (14) to an opposing, rounded end (15) of the drop (14), and
• wherein a height (H) of each drop (14) over the base body (13) is smaller than a width (B) of the annular gap (18) between the base body (13) and inner cylinder wall (17).