A pelletizer for plastics a braking unit including has a brake drum disposed on a sleeve for holding a cuttler drive shaft and a diaphragm disposed on a housing. The brakes unit both biasing and axial movement of cutter knives to a die surface through the sleeve by controlling a pressure of the diaphragm, so that a longer life of the cutter knives, ensured cutting of resin, and use of cutter knives made of an inexpensive material can be achieved.

A powder pelletizer having twin shafts which extend axially through an elongated conduit which bounds the pelletizing zone. Each of the shafts has a multiplicity of agitating members affixed thereto at spaced intervals along the length of the shaft and which extend radially outward therefrom. The agitating members of each shaft are arranged to move into and out interdigitating relationship with agitating members of the other shaft upon rotation of both shafts. The longitudinally extending periph...

A pelletizer comprises a knife head, which is mounted by a denture coupling on a rotatably drivable shaft. The denture coupling comprises at least one serrated ring mounted on the knife head and on the shaft, respectively, the serrated rings having a frontal tooth system and intermeshing. Furthermore, a chucking arrangement of the type of a collect chuck is provided for releasably locking the knife head and the shaft in the direction of their axis.

The pelletizer comprises a chamber having a first side and a second side coupled to an extruder. A shaft extends through the first side into the chamber, a rotatable cutter assembly is mounted to the end of the shaft in the chamber and a die assembly is mounted at the second side of the chamber and has a die face facing into the chamber. The cutter assembly is positioned for rotation adjacent the die face. A prime mover is coupled to the shaft for rotating the cutter assembly. Plastic material i...

An apparatus for pelletizing particulate materials comprising a rotating drum journaled on a screw feeder such that the screw feeder feeds into the bottom of the drum below the surface of the pelletizing bed.

A pelletizer of the type of an underwater cutter has its die surface composed of a surface of rotation, e.g., a right circular cylinder, a frustum of a cone, etc., whereby plastic resin materials fed from an extruder under pressure to the outside of the die wall are forced to extrude through a number of die nozzles drilled in the wall of the die to be cut into pellets by a cutter which is rotating in front of the die surface and provided with a plurality of cutter blades the outer edge of each o...

A vertical underwater type pelletizer-cutter apparatus utilizing a hydraulic suction force for pelletization of thermoplastic polymers comprising a nozzle portion having a plurality of nozzles through which a thermoplastic polymer in a melt state is extruded in strands, an injector portion having a plurality of injectors through which the strands are introduced with water, a cooling portion comprising a plurality of guide tubes through which the strands pass together with said water which cools ...

An apparatus for producing particles of essentially uniform size from plastic materials is provided comprising two oppositely rotating drums positioned parallel and adjacent one another to form a nip, one drum being hollow and having uniformly distributed perforations over a portion of its surface area; a scraper assembly which is located inside the hollow perforated drum; and a discharge means which ejects particles from the interior of the hollow drum.

A pelletizing apparatus is provided with a first passage through which a strand of liquified plastic is fed to a die face. A second passage intersects the first at a point closely spaced from the die face and conducts a stream of pressurized fluid. The end of the strand of plastic forms a plug blocking continued passage of the polymer. Build-up of pressure of the fluid overcomes the blocking force of the plug, cutting the strand at the intersection and ejecting the plug as a pellet. Release of t...

An underwater pelletizer driven from a standard foot mounted electric motor having a standard C-flange attachment in which a pelletizer shaft having a hub is keyed to the motor shaft and held in place by a set screw with the key being welded in a slot in the pelletizer shaft hub to facilitate its manufacture. The pelletizer shaft includes a spring loaded cutter hub enabling automatic blade attachment and compensating for misalignment with the spring loaded cutter hub being keyed to the pelletize...