Abstract: The invention relates to a method for producing powdery plastic particles having as spherical a structure as possible, wherein a starting product (30) made of plastic, in particular a viscous to solid starting product (30), is brought into contact with a smooth surface (24) of a body (20), which is moved at a speed v of at least 5 m/s relative to the starting product (30). In the contact area (34) between the starting product (30) and the body (20), the starting product (30) is heated locally, and is flung in powdery form out of the contact area in the direction of movement of the body (20).

Abstract: Device for producing pulverulent plastics with a spherical structure comprises: a container delimiting an interior space, a nozzle device disposed in an upper region of the interior space and connected to a supplying conveyor pipe for a hot melt of the product, wherein the melt exits the nozzle device and separates into small droplets that fall downward in the interior space, a supply unit for a cryogas in a predominantly liquid state having several outlet openings, wherein a cryogas flow, which comes into contact with the small droplets, exits into the interior space. The supply unit is located above or at the same level as the nozzle device, and method wherein, the hot melt of the product exits the nozzle device in the shape of a spray cone, the cryogas flow exits the supply unit in the shape of a cone, and the spray cone is located within the cone.

Abstract: A method for shaping a starting material of powdered plastic particles includes the following steps: a) providing powdered plastic particles as a starting material; b) heating the plastic particles in a first treatment space to a first temperature below the melting point of the plastic, the first temperature being determined such that the plastic particles do not yet stick to one another; c) transferring a directed current of the plastic particles thus heated into a second treatment space; d) heating the plastic particles in the second treatment space to a second temperature above the melting point of the plastic; and e) cooling the plastic particles to a temperature below the first temperature.

Abstract: The invention relates to a method for producing powdery plastic particles having as spherical a structure as possible, wherein a starting product (30) made of plastic, in particular a viscous to solid starting product (30), is brought into contact with a smooth surface (24) of a body (20), which is moved at a speed v of at least 5 m/s relative to the starting product (30). In the contact area (34) between the starting product (30) and the body (20), the starting product (30) is heated locally, and is flung in powdery form out of the contact area in the direction of movement of the body (20).

Abstract: Device for producing pulverulent plastics with a spherical structure comprises: a container delimiting an interior space, a nozzle device disposed in an upper region of the interior space and connected to a supplying conveyor pipe for a hot melt of the product, wherein the melt exits the nozzle device and separates into small droplets that fall downward in the interior space, a supply unit for a cryogas in a predominantly liquid state having several outlet openings, wherein a cryogas flow, which comes into contact with the small droplets, exits into the interior space. The supply unit is located above or at the same level as the nozzle device, and method wherein, the hot melt of the product exits the nozzle device in the shape of a spray cone, the cryogas flow exits the supply unit in the shape of a cone, and the spray cone is located within the cone.