Feeding screw machine for feeding a processing screw machine

A feeding screw machine for feeding a processing screw machine having a housing, at least two housing bores formed in the housing and penetrating each other, a supply opening formed in the housing for supplying material into the at least two housing bores, a feeding opening formed in the housing for feeding the material to a processing screw machine, and at least two screw shafts rotatably arranged in the at least two housing bores for conveying the material a conveying direction from the supply opening to the feeding opening, wherein the at least two housing bores and the at least two screw shafts in a respective cross-sectional plane (E(x)) define a free volume V(x)=A(x)·H(x), wherein

• A(x) describes a free cross-sectional area in the cross-sectional plane (E(x)),
• H(x) describes a pitch of the screw shafts on a basis of an inclination (S(x)) in the cross-section plane (E(x)), and
• x describes a conveying point in the conveying direction;
• and
• wherein for continuous compression of the material, the free volume V(x) decreases monotonically in the conveying direction at least in some regions.