Abstract: An extruder having a housing (1) comprises at least two conveyor shafts (2, 3) having conveyor cross sections mutually wiping each other that can be driven in the same direction and are disposed in at least two housing bores (11, 12) having a cylindrical or conical design, the axes (15, 16) thereof being disposed parallel to or at an angle to each other, the distance (A) between the axes of the two housing bores (11, 12) being greater than D/1.4142, where D is the diameter of the cylindrical bore or the greatest diameter of the conical bore, and a clearance (a?) being provided between the housing bores (11, 12) and the outer diameter (DE) of the conveyor shafts (2, 3). Each conveyor shaft (2, 3) comprises a plurality of conveyor segments (17a through d, 18a through d), wherein the offset angle of at least two adjacent conveyor segments (17a, 17b, 18a, 18b) on each conveyor shaft (2, 3) relative to each other is 180°.

Abstract: An extruder having a housing (1) comprises at least two conveyor shafts (2, 3) having conveyor cross sections mutually wiping each other that can be driven in the same direction and are disposed in at least two housing bores (11, 12) having a cylindrical or conical design, the axes (15, 16) thereof being disposed parallel to or at an angle to each other, the distance (A) between the axes of the two housing bores (11, 12) being greater than D/1.4142, where D is the diameter of the cylindrical bore or the greatest diameter of the conical bore, and a clearance (a?) being provided between the housing bores (11, 12) and the outer diameter (DE) of the conveyor shafts (2, 3). Each conveyor shaft (2, 3) comprises a plurality of conveyor segments (17a through d, 18a through d), wherein the offset angle of at least two adjacent conveyor segments (17a, 17b, 18a, 18b) on each conveyor shaft (2, 3) relative to each other is 180°.

Abstract: A multi-shaft extruder has between an exterior housing (9) and an interior housing (10) at least six worm shafts (4) disposed in a circle (7). The drive (1) of the multi-shaft extruder has two pinion shafts (2) which are partitioned into groups of identical design and disposed on a circle (7), the pinion shafts being radially driven from the inside and from the outside at equal forces and in the same direction and in diametrical opposition and coaxially connected to the worm shafts (4) of the process part (5) via couplings (3), the worm shafts (4) having a feed length (L) of at least six Do and a Do/Di ratio of 1.5 to 1.93, wherein Do is the outside diameter and Di is the inside diameter of the feed screws (11, 12, 13) and the torque density of the extruder is at least 50 Nm/cm3.

Abstract: To drive an extruder (1) which has several axially parallel shafts (3) rotating in the same direction, with conveyor elements (4), arranged around a circle at equal angles with respect to each other, the shafts (3) are attached to the driven shafts (11) of a gear system, wherein each driven shaft (11) has a pinion (19, 20) and each driven pinion (19, 20) engages both with an externally-toothed drive wheel (21, 22) and with an internally-toothed hollow gear wheel (24, 25), and the externally-toothed drive wheel (21, 22) and the internally-toothed hollow gear wheel (24, 25) are driven with the same torque.

Abstract: A multiple-shaft extruder comprises a core (4) with outward leading channels that can be flown through by a cooling liquid. At least two housing segments (16 to 19) are each provided with a cooling circuit with interconnected cooling bore holes (28), which can be flown through by a cooling liquid, are distributed in the peripheral direction and in an axially parallel manner, and which are located on the section of the housing segments (16 to 19) that faces the process chamber (2).

Abstract: An apparatus for dispersing and melting flowable substances has axis-parallel supporting shafts (1, 2) rotatable in the same direction on which screw elements (3, 3?) with the same direction of thread are fitted so as to rotate in unison, with which the shafts mesh. The screw elements (3, 3?) consist of screw portions (11, 12, 13, 14; 11?, 12?, 13?, 14?) that are disposed at a progressive angular offset from each other with the same sense of rotation so as to form faces (15, 16; 15?, 16?).

Abstract: An extruder has parallel, corotating shafts (3) along a circle which are equipped with elements consisting at least partly of screw elements (1) closely intermeshing over their whole circumference. At least one screw element is formed as a passage screw element (6) with recesses (8) in the screw crest, screw core and/or screw flank. Downstream thereof is an element inhibiting the product flow in the flight of the passage screw element (6).

Abstract: In an extruder for continuous working and/or processing of flowable substances having at least two parallel, corotating shafts equipped with intermeshing screw elements whose face is limited by circular arcs corresponding to the outside screw diameter, the screw core diameter and at most the center distance of the screw elements, and guided on circular segments of the extruder housing that are parallel to the shafts, at least one screw element (1) has a plurality of concentric ring portions (8) spaced a distance apart and formed by grooves (12) turned into the screw element (1).

Abstract: The invention is directed to an apparatus for continuous processing of pourable and flowable materials having a plurality of axis-parallel, rotatable shafts disposed at the same central angle distance along a circle in a space in a housing. Each shaft carries a number of processing elements disposed axially one behind the other with which adjacent shafts closely mesh. The housing is provided on the radially inside and outside sides of the space with axis-parallel concave segments of a circle which receive and guide the particular shaft with its processing elements. At least one material supply opening is provided at one end of the housing and at least one material discharge opening is provided at the other end of the house. At least one radial opening is provided along the circle for passage of the material from the radially outside to the radially inside sides of the space.

Abstract: The invention relates to a torque-splitting gear having a driving shaft and axis-parallel driven pinion shafts running in the same sense which are coupled with each other by toothed wheels. The gear is to be designed in such a way that it can be built up in different dimensions and for different powers while maintaining a great number of its components without change. The coupling between the driving shaft and the main driving toothed wheels is realized by a herringbone gearing. For transmitting great torques the main driving toothed wheels and the pinions on the driven pinion shafts are additionally coupled with each other via intermediate pinions and hollow wheels.

Abstract: A worm shaft machine comprises having a longitudinal direction and composed of a plurality of housing portions located near one another in the longitudinal direction, the housing portions having a substantially rectangular outer contour and being provided with longitudinal openings for receiving a worm, the housing portions being assembled with one another so that they abut against one another in the longitudinal diection, a plurality of tensioning rods which tension the housing portions with one another, a closed frame provided at each end of each of the housing portions and forming a pressing piece, the frames having small sides on which they are horizontally exactly slidingly supported.

Abstract: Continuous homogenization and mixing of plastic material using a plurality of elements with worm threads having the same pitch direction. The elements engage one another to form a near fit and can be driven in the same sense. Each worm element is divided into successive disks, which correspond from element to element. The disks of each group of worm elements are turned by the same angle in the same sense. The front side surfaces of the disks which become free during rotation have centric shoulders with heights and widths that permit full movement of the respective frontal sides when the worm elements rotate.