Abstract: To retain elongated removable cutter elements (9, 90) on an axially elongated cylindrical body structure (1, 1'), eccentric holding plugs (27, 30, 300) are directly or indirectly engageable with the cutter elements so that the cutter elements can be clamped in grooves (5) with converging side walls, by engaging the eccentric elements either directly against the cutter elements (FIG. 4) or indirectly via a resiliently deflectable or deformable portion (16) of the tool body (1, 1'). The tool body can be formed as an open cage structure (1') (FIGS. 5-8) to permit granulated plastic material to fall between rods or rails (34) formed with the grooves (5) in which the cutter elements (9, 90) are retained by the eccenters (27).

Abstract: To permit easy replacement of individual cutter elements (13) located on a cylindrical body (1, 1') formed with essentially axially directed, circumferentially uniformly distributed grooves (5) therein, and in which the cutter elements are held by eccentric clamping bodies (40), and to ensure that the cutting edges of the cutter elements operate on a common theoretical circumferential cylinder, the grooves (5) are formed with internal ppositioning abutments (12, 8) which determine, upon engagement with matching engagement positioning surfaces (26) formed on the cutter elements, the positioning surfaces (26) thereby render the position of the cutter elements in the grooves independent of the cutting geometry of the respective elements.

Abstract: To provide for self-holding of cutter elements in grooves of a rotary cutter body (1; 100, 30, 33), which self holding is enhanced by centrifugal forces acting on the cutter elements, the grooves (2) in the body define first and second lateral support surfaces (13, 5), the cutter elements (6, 6a, 6b, 6c) define first and second engagement surfaces (12, 11) and a clamping element (7, 7') is provided defining an engagement surface facing the cutter element, the surfaces being so arranged that at least part of the first support surfaces (13) and at least part of the first engagement surface (12) of the cutter element form, in cross section, a wedge-shaped space which decreases in width towards the circumference of the cylindrical body, and each clamping element, in cross section, likewise is wedge-shaped and dimensioned and shaped to fit the wedge-shaped space. Preferably, the lateral support surfaces (5) define an acute angle with respect to each other.

Abstract: An essentially cylindrical comminuting tool has axially extending cutter bars (8, 8a) having cutting edges (9) at the outer circumference thereof; the cutter bars are located in uniformly distributed position on the circumference of the tool and clamped therein by clamping elements (2, 2a) which are radially moved inwardly, to pull the cutter bars in tightly clamped position, by conical surfaces (18) formed on inwardly projecting portions (16) which engage with conical surfaces formed on clamping disks (19). The clamping disks (19) are drawn together by tension bolts (23). For simple assembly of the cutter bars, two clamping elements (2a) can be joined together into a U-shaped structure (FIG. 4), or all the clamping elements can be assembled in a ring-like structure (FIG. 5). The clamping elements preferably have angled, shallow V-shaped clamping surfaces (5a, 6a) which match similar clamping surfaces (5, 6) on the cutter bars.

Abstract: Feeding of molten plastic strands into a discharge trough. At its upper end the discharge trough includes a slidably movable segment that can be extended behind the fall line of the strands as they emerge from nozzles. In its operating position, the extended segment catches the strands, and can be moved into a fore-running or non-operating position permitting free passage of the strands at the side of the discharge trough. A separational element is associated with the movable segment. As the segment is moved through the fall line of the strands, the separational element acts upon the strands and effects the desired separation. The strands which enter the discharge trough are cooled and ultimately fed to a granulator.

Abstract: A device for the dehydration and drying of solids, especially granulated plastic materials, in the form of a mixture of granulate and water. Water passes through a curved sieve by an air current that flows in the direction in which the water passes through the sieve and also flows along the sieve. The mixture of granulate and water is delivered to the curved sieve through a delivery channel and whirled, by the energy of the air current, over the curved sieve and conveyed to an outlet duct, at the end of the curved sieve. On the curved sieve, an air jet that runs at an angle to the sieve, is directed for the admission of the air current. The mixture of granulate and water that is carried along by the air current, hits the curved sieve at an angle ranging, approximately between 25.degree. to 75.degree. in relation to the curved sieve. In the direction of flow, behind the air jet, is a cover which covers the curved sieve. The cover is adjacent to the rear wall of the air jet, and extends to the outlet passage.

Abstract: The present material transport device for a granulating apparatus includes a plurality of transport pressure rollers arranged in a curved row for cooperation with a transport cylinder of the granulating apparatus. An infeed table extends substantially tangentially relative to the transport cylinder which forms with the first pressure rollr of said row an infeed point. A run-off table extends also substantially tangentially relative to said transport cylinder and forms with its downstream end a counter ledge for a rotary knife. The row of pressure rollers extends around the transport cylinder from said infeed point substantially to said counter ledge.

Abstract: This noise reducing device is arranged in the discharge chute of a material granulating apparatus in which a rapidly rotating knife cuts strips or strands of material into granules. In one embodiment of the device a wing wheel or impeller type of wheel is supported off-center for rotation in a portion of substantially cylindrical cross section of the chute. In another embodiment, angularly arranged plates are positioned substantially oppositely each other in the discharge chute to deflect the granular material so as to follow a zig-zag path.