Abstract: The invention relates to a crushing tool for plastic materials drivable to a rotary motion, comprising a carrier (1), which can be rotated about a rotational axis (B) centrally located on it and on the surface (3) of which tools (4) for the processing and crushing of the plastic materials are arranged. It is provided according to the present invention, that in the area of the rotational axis (B) of the carrier (1) a deflector (5) is arranged, wherein in an area of the carrier (1) connecting radially to the deflector (5) web- or strip-shaped conveyor wings (6) are arranged and in the area of the carrier (1) connecting to the conveyor wings (6) radially towards the edge (7) the tools (5) are arranged.

Abstract: The invention relates to a filter device for polymer melts, having a filter screen (1), through which the polymer melt to be purified is guided, wherein the filter device comprises at least one scraping element (2), which glides across the upstream surface (4) of the filter screen (1) with its scraping edge (3), or rests on the surface (4) with its end area nearest the scraping edge (3), and lifts off and/or scrapes off the contaminations (6) adhering to the surface (4) and those present in front of the screen orifices (5) in the course of its movement across the surface (4). According to the invention it is provided that the scraping element (2) is embodied in the shape of a disk, in particular comprising parallel, preferably plane large surfaces, i.e. a back face (8) and a front face (9) and is disposed at an inclined pitch (A) of 5 to 60°, preferably 10 to 45°, in particular 20 to 35° toward the surface (4) of the filter screen (1).

Abstract: The invention relates to a filter device for polymer melts, having a filter screen (1), through which the polymer melt to be purified is guided, wherein the filter device comprises at least one scraping element (2), which glides across the upstream surface (4) of the filter screen (1) with its scraping edge (3), or rests on the surface (4) with its end area nearest the scraping edge (3), and lifts off and/or scrapes off the contaminations (6) adhering to the surface (4) and those present in front of the screen orifices (5) in the course of its movement across the surface (4). According to the invention it is provided that the scraping edge (3) has a curvature (7) at least in the end area of the same, leading in the direction of movement (16), the radius (R) of which is less than 90%, preferably less than 50%, in particular less than 20% of the maximum diameter, or of the maximum orifice width of the screen orifices (5).

Abstract: The present invention concerns a method for processing and detoxification of a material, especially a thermoplastic material, and for removal of contaminants or impurities from this material, wherein the material is heated under vacuum in at least one receiving tank, mixed and possibly comminuted, and wherein a rinsing medium is introduced into the receiving tank beneath the material level, conducted through at least a partial region of the material, and the rinsing medium enriched or saturated with contaminants is brought out from the receiving tank once more. According to the invention, the quantity of rinsing medium introduced into the receiving tank is less than 0.1 liter per hour per kilogram of material or material throughput per hour, while at the same time the vacuum in the receiving tank is kept constantly below 100 mbar.

Abstract: The present invention concerns a method for processing and detoxification of a material, especially a thermoplastic material, and for removal of contaminants or impurities from this material, wherein the material is heated under vacuum in at least one receiving tank (1), mixed and possibly comminuted, and wherein a rinsing medium is introduced into the receiving tank (1) beneath the material level, conducted through at least a partial region of the material, and the rinsing medium enriched or saturated with contaminants is brought out from the receiving tank (1) once more.

Abstract: The invention relates to a method and a device for introducing and/or adding non-dry-powder additive materials and/or coating materials with a liquid, solid, semi-solid, or paste-like consistency or in suspended or emulsified form, for example, peroxides, fats, waxes, IV improvers, polymers, or similar materials, to an existing lumpy or particulate material which is moved and mixed, and optionally warmed and reduced to small pieces in a receptacle and/or compressor (1), said material being in particular polymer particles and/or flakes, wood fibers, paper cuttings, or similar materials. According to the invention, the additive material is introduced below the level of the material and/or material particles already in the receptacle (1).

Abstract: Disclosed is a device and a method for processing plastic material with at least one receiving container, wherein at least one mixing and/or comminution tool, rotatable about a rotation axis, is arranged, for mixing and warming the plastic material, and with at least one conveyor for discharging the plastic material from the receiving container, with at least one screw rotating in a housing, where the conveyor is connected, at its material inlet side via an opening which is formed in a side wall of the receiving container, with the interior of the receiving container. An imaginary extension of the central longitudinal axis of the conveyor extends, against the conveyance direction of the conveyor, past the rotation axis of the receiving container, without intersecting this axis, where the longitudinal axis of the conveyor is offset by a separation relative to the radial ray of the receiving container on the discharge side.

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a rotatable mixing and/or comminution implement, where, in a side wall, an aperture is formed, and a conveyor being provided, with a screw rotating in a housing, where the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and wherein the radial distance (mb) between the implement and the inner surface of the side wall of the container is in the range from 15 mm to 120 mm, and complies with the following relationship: mb=k*DB, where DB is the internal diameter of the container in mm and k is a constant in the range from 0.006 to 0.16.

Abstract: Disclosed is an apparatus for the processing of plastics, having a container with a rotatable mixing implement, where a conveyor is provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis and the radial that is parallel to the longitudinal axis, wherein on the internal wall area of the container, there is at least one bar-shaped deflector which is directed into the interior of the container, and the height profile of which decreases in the direction of rotation of the mixing implement, seen from above, and the angle included thereby, over its length, with a plane (E) perpendicular to the axis of rotation of the mixing implements is an acute angle (?).

Abstract: Disclosed is an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation. In a side wall, an aperture is formed, through which the plastics material can be removed, a conveyor being provided, with a screw rotating in a housing. The apparatus is characterized in that the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, there being, on the outflow side, an offset distance between the longitudinal axis and the radius that is parallel to the longitudinal axis, that the L/D ratio of the screw is greater than or equal to 7, and that the compressing format of the screw begins only from a distance (A) of more than 1.5 times the diameter (d) of the screw.

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a rotatable mixing implement, wherein the imaginary continuation of the longitudinal axis of a conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis and the radial parallel to the longitudinal axis, wherein in the wall section that is part of the housing and that immediately follows the intake aperture in the direction of conveying and that completely surrounds the screw, a pocket extends in the direction of conveying, starting at the downstream edge of the intake aperture over a length (L), where 0.8 d?L?9 d, where d is the external diameter or the diameter of the envelope curve of the screw in the wall section.

Abstract: Disclosed in an apparatus for the processing of plastics, with a container with a rotatable mixing implement, wherein a conveyor being provided, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, there being, on the outflow side, an offset distance between the longitudinal axis and the radius that is parallel to the longitudinal axis, and wherein the smallest possible distance (ms) between the implement and screw is described by the following relationship: ms?k*d+K, where d is the diameter of the screw in mm, K is a factor in the range from 20 to 100, more particularly 20 to 80, k is a factor in the range from 0.03 to 0.4, more particularly 0.04 to 0.25.

Abstract: Disclosed is an apparatus for the processing of plastics, with a container with a mixing implement rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, and a conveyor, with a screw rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and wherein the L/D ratio of the screw is ?7, and wherein the setting angle (?) of the radially outermost mixing implement, closest to the base, complies with the following relationship: ?=k*d+K, where d is the diameter of the screw in mm, K is a factor in the range from 15 to 35, k is a factor in the range from 0.08 to 0.2.

Abstract: Disclosed is an apparatus for processing plastics, having a mixing implement rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material is removed, a conveyor being provided, with a screw rotating in a housing wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, and on the outflow side, an offset distance between the longitudinal axis and the radial that is parallel to the longitudinal axis, and the diameter D of the container has the following relationship to the diameter d of the screw: D = 10 · K · d 2 3 , where D is the internal diameter in mm of the container d is the diameter in mm of the screw and K is a constant which is in the range from 60 to 180.

Abstract: Disclosed is an apparatus for processing of plastics, with a container with a mixing implement, and a conveyor provided with a screw rotating in a housing, the housing being divided into two chambers, the frontal chamber having an intake aperture, and the rearward chamber having at least one degassing aperture, the two chambers being connected to one another through a channel having a melt filter, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, wherein the distance from the opening of the channel into the rearward chamber to the degassing aperture is in a range from 1.5 to 15 times the nominal diameter (d) of the screw.

Abstract: Disclosed is a device and a method for processing plastic material with at least one receiving container, wherein at least one mixing and/or comminution tool, rotatable about a rotation axis, is arranged, for mixing and warming the plastic material, and with at least one conveyor for discharging the plastic material from the receiving container, with at least one screw rotating in a housing, where the conveyor is connected, at its material inlet side via an opening which is formed in a side wall of the receiving container, with the interior of the receiving container. An imaginary extension of the central longitudinal axis of the conveyor extends, against the conveyance direction of the conveyor, past the rotation axis of the receiving container, without intersecting this axis, where the longitudinal axis of the conveyor is offset by a separation relative to the radial ray of the receiving container on the discharge side.

Abstract: The invention relates to a rotor disk (1) for inserting into a receiving container (2) for treating polymers, comprising a disk body (3), on the upper face (4) of which mixing and/or comminuting tools (5) can be provided and on the opposite lower face (6) of which a number of conveying ribs (7) extending from the inside out is provided, by means of which conveying ribs polymer particles can be conveyed outward during operation or which conveying ribs exert a force directed outward from the center (8) of the rotor disk (1) on the polymer particles caught by the conveying ribs (7) during operation. According to the invention, the thickness of the disk body (3) is reduced toward the outside.

Abstract: The invention relates to a method and to an assembly for recycling plastic materials, comprising the following processing steps: a) reprocessing the raw material, wherein the material, if necessary, is comminuted and brought into a fluid-like form and heated and permanently mixed, while preserving the lumpiness and pourability thereof, and optionally the viscosity thereof is increased and/or it is degassed, softened, dried and/or crystallized; b) melting the reprocessed material, at least so much that filtration is possible; c) filtering the melt in order to remove impurities; d) homogenizing the filtered melt; e) degassing the homogenized melt; and f) discharging and/or subsequently processing the melt, such as by granulation, blown film processing, with said processing steps being carried out consecutively in the order listed (FIG. 2).

Abstract: An apparatus for granulating hot cut, in particular thermoplastic resin material, the material strands melted by an extruder being knocked off into granule pellets in a granulating housing by rotating knives disposed on a shaft driven by way of a motor, the granule pellets being picked up by a cooling medium flowing in the granulating housing, cooled and discharged out of the granulating housing, characterized in that a flow opening establishing a continuous fluid connection between the inside of the granulating housing and the outside environment is designed between the shaft and the region of the granulating housing in which the shaft penetrates the granulating housing.

Abstract: The invention relates to a method for producing a thermoplastic polymer material that is filled with at least one filler, preferably calcium carbonate CaCO3, sensitive to hydrolytic degradation and optionally hygroscopic, and produced by way of polycondensation, particularly PET, wherein under vacuum conditions, constant stirring or mixing and an increased temperature, a mixture of not yet melted, optionally softened, polymer materials comprising the filler is produced, wherein for this purpose a filler, which at the time of addition has not been predried and has a residual moisture (H2O) of more than 500 ppm, particularly more than 1000 ppm, is used.