Abstract: A device for producing pellets from a melt material. The device can have a perforated plate with nozzles from which a melt material emerges. Located opposite the perforated plate is a cutting chamber with a motor-driven cutter arrangement having a cutter head with at least one blade, and a cutter shaft. A coolant is introduced into the cutting chamber from an inlet apparatus. The inlet apparatus has a separate inlet chamber that circumferentially encloses the cutting chamber in the area of rotation of the at least one blade, and has an adjustable annular inlet nozzle arrangement. Coolant is introduced into the cutting chamber circumferentially and substantially radially inward from the outside. A substantially centripetal flow of the coolant is produced in the area of rotation, and the coolant and the pellets are conveyed to an outlet of the cutting chamber.

Abstract: A method for making granules from a melt material extruded by being pressed through nozzle openings of a perforated plate in a cutting chamber. In this process, the melt material emerging from the nozzle openings of the perforated plate is cut into molten granules in the cutting chamber by at least one rotating cutting knife that sweeps across the nozzle openings. A first coolant flow of a first coolant medium is delivered through a first coolant inlet to at least one first coolant port, with which the melt material is cooled when emerging and being cut at the perforated plate. Furthermore, a second coolant flow of a second coolant medium different from the first is delivered through a second coolant inlet to at least one second coolant port downstream of the perforated plate, with which the granules are additionally cooled and conveyed to an outlet of the cutting chamber.

Abstract: A device and method for producing pellets from a melt material, the device having a perforated plate with nozzles. Located opposite the perforated plate is a cutter arrangement having a cutter head with at least one blade, wherein the device additionally has a cutting chamber in a housing. A coolant is introduced into the cutting chamber from an inlet apparatus, wherein one or more additional feed opening(s) is/are provided for an additional flow of coolant to the cutting chamber. The additional coolant flows at least in the area of rotation of the at least one blade, circumferentially at least in sections, with an orientation such that this additional flow of coolant differs from the flow of coolant entering through the inlet nozzle arrangement in at least one of the following parameters: physical state, direction, speed, pressure, temperature, density, throughput rate, and/or composition.

Abstract: A method and a device for producing superficially crystalline spherical granules by means of air-cooled hot die face pelletizing in a cutting chamber. A crystallizable plastic material can be melted and then extruded through a perforated plate. During the air-cooled hot die face pelletizing, at least one cutting blade can be moved relative to the perforated plate. The perforated plate can be temperature-controlled while maintaining a viscosity of the plastic material within nozzle openings. A superficial cooling to a crystal nucleation temperature of the dry-cut granules is performed by means of a centripetally inflowing process gas. The crystal nucleation temperature is below an optimum crystal growth temperature and above a glass transition temperature. By controlling the quantity of process gas at an adiabatic temperature, an average granule temperature is maintained in a range of an optimum crystal growth temperature.

Abstract: A granulating device for granulating thermoplastic materials. The device has a die head, a cutting chamber housing, and at least one insulating element comprising thermally insulating material. The insulating element is situated between a die head element and a cutting chamber housing element. At least one tempering device situated between the insulating element and cutting chamber housing element or adjacent to the insulating element is provided. The tempering device acts to remove unwanted heat introduced in its vicinity, or to replenish heat undesirably removed from its vicinity.

Abstract: A device and method for producing pellets from a melt material. The device comprises a perforated plate with nozzles from which a melt material emerges. The device further comprises a cutting chamber in a housing adjoining the perforated plate and enclosing at least a part of a cutter arrangement. A gaseous coolant, cooled through adiabatic expansion by means of a throttling device, flows through the cutting chamber such that pellets of the melt material are solidified. The gaseous coolant is introduced into the cutting chamber from an inlet apparatus and the gaseous coolant and the pellets located therein are conveyed to an outlet of the cutting chamber.

Abstract: A granulating device for granulating thermoplastic materials. The device has a die head, a cutting chamber housing, and at least one insulating element comprising thermally insulating material. The insulating element is situated between a die head element and a cutting chamber housing element. At least one tempering device situated between the insulating element and cutting chamber housing element or adjacent to the insulating element is provided. The tempering device acts to remove unwanted heat introduced in its vicinity, or to replenish heat undesirably removed from its vicinity.

Abstract: A nozzle plate for a granulating device. The nozzle plate has a plurality of nozzles for the passage of melt, wherein the nozzles are arranged such that they lie on a circle about a center axis. Each nozzle has a nozzle channel and at least one nozzle opening. A recess for receiving a melt flow is formed on the surface of the nozzle plate opposite the surface comprising the nozzle opening. The recess can also be centered on the center axis. A plurality of flow channels in fluid communication with the recess and at least one flow channel are formed in the nozzle plate extending radially away from the center. A granulating device having such a nozzle plate.

Abstract: A device for producing pellets from a melt material. The device can have a perforated plate with nozzles from which a melt material emerges. Located opposite the perforated plate is a cutting chamber with a motor-driven cutter arrangement having a cutter head with at least one blade, and a cutter shaft. A coolant is introduced into the cutting chamber from an inlet apparatus. The inlet apparatus has a separate inlet chamber that circumferentially encloses the cutting chamber in the area of rotation of the at least one blade, and has an adjustable annular inlet nozzle arrangement. Coolant is introduced into the cutting chamber circumferentially and substantially radially inward from the outside. A substantially centripetal flow of the coolant is produced in the area of rotation, and the coolant and the pellets are conveyed to an outlet of the cutting chamber.

Abstract: A method for producing pharmaceutical products from a melt material, wherein the melt material emerges from nozzles in a perforated plate, and is then granulated. A motor-driven cutter arrangement having at least one blade is opposite the perforated plate so that it cuts pellets emerging from nozzles in the perforated plate. A gaseous coolant flows through a housing which adjoins the perforated plate and encloses the at least one blade. The pellets of the melt material are then solidified in the coolant. Coolant is introduced from a separate inlet chamber that circumferentially encloses the housing in the area of rotation and from an inlet nozzle arrangement extending circumferentially between the inlet chamber and the housing. Coolant is introduced circumferentially from all sides essentially radially inward. A substantially centripetal flow of the coolant is produced in the area of rotation, and the coolant and pellets are conveyed to an outlet.

Abstract: A perforated plate of a granulating device for thermoplastic plastic material, having nozzle openings, and wherein at least one side of the perforated plate has a functional layer in at least one region. The functional layer is thermally insulating as compared to the base material of the perforated plate, and is more abrasion-resistant than the base material of the perforated plate, and consists of an enamel coating.

Abstract: The invention relates to a device for producing pellets from a plastic melt by extrusion, comprising a perforated plate from which the plastic melt is extruded at a pressure above the ambient pressure; a process chamber into which the plastic melt is extruded; a chopping device for chopping strands of the plastic melt extruded from the perforated plate into individual granules, the process chamber being filled with a process fluid; and a pumping device which supplies the process fluid to the process chamber at a pressure above the ambient pressure, the pressure of the process fluid with the therein contained granules being reduced downstream of the process chamber.

Abstract: The invention relates to a device for producing pellets from a plastic melt by extrusion, comprising a perforated plate from which the plastic melt is extruded at a pressure above the ambient pressure; a process chamber into which the plastic melt is extruded; a chopping device for chopping strands of the plastic melt extruded from the perforated plate into individual granules, the process chamber being filled with a process fluid; and a pumping device which supplies the process fluid to the process chamber at a pressure above the ambient pressure, the pressure of the process fluid with the therein contained granules being reduced downstream of the process chamber.

Abstract: The invention relates to a granulator for producing granulate from molten plastic with a cutter head displaceable over an adjustment range, said cutter head cooperating with a die plate dispensing the plastic strands, said cutter head being connected to a drive shaft of a drive motor containing a stator and a drive rotor and being axially displaceable with respect to the die plate. The drive rotor is axially displaceable over the adjustment range by means of a linear adjustment element and is fixable in said range.

Abstract: The invention relates to a granulator for producing granulate from molten plastic with a cutter head displaceable over an adjustment range, said cutter head cooperating with a die plate dispensing the plastic strands, said cutter head being connected to a drive shaft of a drive motor containing a stator and a drive rotor and being axially displaceable with respect to the die plate. The drive rotor is axially displaceable over the adjustment range by means of a linear adjustment element and is fixable in said range.