Filter device for the high-pressure filtration of a plastic melt

A screen wheel filter device for high-pressure filtration of a plastic melt, the screen wheel filter device comprising:

• a housing comprising an inlet plate with at least one inlet channel and an outlet plate with at least one outlet channel;
• at least one spacer element arranged between the inlet plate and the outlet plate;
• a bearing ring on which a screen wheel is rotatably mounted and that is arranged between the inlet plate and the outlet plate;
• at least two screen segments arranged on the screen wheel that each are adapted to be positioned between the inlet and outlet channels and through each of which a flow is adapted to pass;
• a lubrication gap formed between the screen wheel and the inlet plate and between the screen wheel and the outlet plate;
• a funnel mouth formed on each of the inlet channel and the outlet channel, each of the funnel mouths expanding toward the screen wheel, between which is formed a throughflow region;
• at least one radial pressure relief flow path that crosses an inner, annular sealing web of the screen wheel and extends between the throughflow region;
• at least one pressure relief bore formed within at least one lubrication gap;
• and
• at least one pressure relief bore formed in the inlet plate or in the outlet plate, the at least one pressure relief bore terminating at the bearing ring, the pressure relief bore being connected in a fluid-conducting manner to a relief opening on an outside of the housing via a pressure relief channel formed at the housing.